Version 1.22

Backport of 2e5c767d4c

.gitignore

@@ -16,7 +16,6 @@ missing
 *.o
 stamp-h1
 ncdu
-ncdu.1
 *~
 *.swp
 static/*

COPYING

@@ -1,4 +1,4 @@
-Copyright (c) 2007-2020 Yoran Heling
+Copyright (c) Yorhel
 
 Permission is hereby granted, free of charge, to any person obtaining
 a copy of this software and associated documentation files (the

ChangeLog

@@ -1,3 +1,60 @@
+1.22 - 2025-03-05
+	- Add support for @-prefixed lines to ignore errors in config file (from 2.8)
+	- List all supported options in `--help` (from 2.8)
+	- Use `kB` instead of `KB` in `--si` mode (from 2.8)
+	- Add `--graph-style` option (from 2.1)
+	- Fix supported range of uid/gid numbers
+
+1.21 - 2024-11-19
+	- Perform tilde expansion on paths in the config file (from 2.7)
+	- Fix JSON import of escaped UTF-16 surrogate pairs (from 2.7)
+	- Fix displaying and exporting zero values when extended info is not
+	  available (from 2.6)
+	- Fix JSON export and import of the “other filesystem” flag (from 2.5)
+
+1.20 - 2024-04-21
+	- Revert default color scheme back to 'off'
+	- Rewrite man page in mdoc, drop pod2man dependency
+
+1.19 - 2023-09-11
+	- Fix typo in --exclude-from argument
+	- Add --(enable|disable)-natsort options
+	- Add indicator to apparent size/disk usage selection in the footer
+
+1.18.1 - 2023-02-12
+	- Fix build on non-Linux platforms
+
+1.18 - 2022-12-06
+	- Fix 'dark-bg' color scheme to actually have a dark background
+	- Backport configuration file support from 2.x
+	- Backport many new CLI options from 2.x
+	- Negation of existing flags: --no-si, --no-confirm-quit, --no-follow-symlinks, --include-caches, --include-kernfs
+	- --[no-]extended in addition to -e
+	- --one-file-system and --cross-file-system in addition to -x
+	- --slow-ui-updates, --fast-ui-updates in addition to -q
+	- Column visibility options: --(show|hide)-(hidden|itemcount|mtime|graph|percent)
+	- Sorting: --sort, --[no-]group-directories-first
+	- Feature selection: --(enable|disable)-(shell|delete|refresh)
+	- Deletion confirmation: --[no-]confirm-delete
+	- Hidden file visibility: --show-hidden, --hide-hidden
+	- Size display: --apparent-size, --disk-usage
+
+1.17 - 2022-04-28
+	- Add 'dark-bg' color scheme and use that by default
+	- Use natural sort order when sorting by file name
+	- Improve compatibility with C89 environments
+	- Fix wrong assumption about errno not being set by realloc()
+
+1.16 - 2021-07-02
+	- Increase width of size bar depending on terminal size (Christian Göttsche)
+	- Set/increment $NCDU_LEVEL variable when spawning a shell
+	- Indicate whether apparent size or disk usage is being displayed
+	- Display setuid, setgid and sticky bits in file flags in extended mode
+	- Fix error handling while reading --exclude-from file
+	- Improve JSON import to allow for several future extensions to the format
+	- Export link count in JSON dumps
+	- Don't export inode in JSON dumps for non-hardlinks
+
 1.15.1 - 2020-06-10
 	- (Linux) Fix build on older Linux systems (Christian Göttsche)
 	- (MacOS) Revert "Exclude firmlinks by default" behavior (until we have a better solution)

Makefile.am

@@ -16,11 +16,13 @@ ncdu_SOURCES=\
 	src/quit.c\
 	src/main.c\
 	src/path.c\
-	src/util.c
+	src/util.c\
+	deps/strnatcmp.c
+
 
 noinst_HEADERS=\
-	deps/yopt.h\
 	deps/khashl.h\
+	deps/strnatcmp.h\
 	src/browser.h\
 	src/delete.h\
 	src/dir.h\
@@ -35,13 +37,11 @@ noinst_HEADERS=\
 
 
 man_MANS=ncdu.1
-EXTRA_DIST=ncdu.1 doc/ncdu.pod
-
-# Don't "clean" ncdu.1, it should be in the tarball so that pod2man isn't a
-# build dependency for those who use the tarball.
-ncdu.1: $(srcdir)/doc/ncdu.pod
-	pod2man --center "ncdu manual" --release "@PACKAGE@-@VERSION@" "$(srcdir)/doc/ncdu.pod" >ncdu.1
+EXTRA_DIST=ncdu.1
 
+# This target exists more for documentation purposes than actual use; some
+# dependencies have minor ncdu-specific changes.
 update-deps:
 	wget -q https://raw.github.com/attractivechaos/klib/master/khashl.h -O "$(srcdir)/deps/khashl.h"
-	wget -q http://g.blicky.net/ylib.git/plain/yopt.h -O "$(srcdir)/deps/yopt.h"
+	wget -q https://raw.githubusercontent.com/sourcefrog/natsort/master/strnatcmp.h -O "$(srcdir)/deps/strnatcmp.h"
+	wget -q https://raw.githubusercontent.com/sourcefrog/natsort/master/strnatcmp.c -O "$(srcdir)/deps/strnatcmp.c"

README

@@ -1,5 +1,5 @@
-ncdu 1.15.1
-===========
+ncdu 1.22
+=========
 
 DESCRIPTION
 
@@ -25,15 +25,14 @@ INSTALL
     make
     make install
 
-  If you're building directly from the git repository, make sure you have perl
-  (or rather, pod2man), pkg-config and GNU autoconf/automake installed, then
-  run 'autoreconf -i', and you're ready to continue with the usual ./configure
-  and make route.
+  If you're building directly from the git repository, make sure you have
+  pkg-config and GNU autoconf/automake installed, then run 'autoreconf -i',
+  and you're ready to continue with the usual ./configure and make route.
 
 
 COPYING
 
-  Copyright (c) 2007-2020 Yoran Heling
+  Copyright (c) Yorhel
 
   Permission is hereby granted, free of charge, to any person obtaining
   a copy of this software and associated documentation files (the

configure.ac

@@ -1,10 +1,11 @@
 
-AC_INIT([ncdu],[1.15.1],[projects@yorhel.nl])
+AC_INIT([ncdu],[1.22],[projects@yorhel.nl])
 AC_CONFIG_SRCDIR([src/global.h])
-AC_CONFIG_HEADER([config.h])
+AC_CONFIG_HEADERS([config.h])
 AM_INIT_AUTOMAKE([foreign std-options subdir-objects])
 
 # Check for programs.
+AC_USE_SYSTEM_EXTENSIONS
 AC_PROG_CC
 AC_PROG_INSTALL
 AC_PROG_RANLIB
@@ -22,6 +23,8 @@ AC_TYPE_INT64_T
 AC_TYPE_UINT64_T
 AC_SYS_LARGEFILE
 AC_STRUCT_ST_BLOCKS
+AC_C_INLINE
+AC_C_FLEXIBLE_ARRAY_MEMBER
 
 # Check for library functions.
 AC_CHECK_FUNCS(

deps/strnatcmp.c

@@ -0,0 +1,164 @@
+/* -*- mode: c; c-file-style: "k&r" -*-
+
+  strnatcmp.c -- Perform 'natural order' comparisons of strings in C.
+  Copyright (C) 2000, 2004 by Martin Pool <mbp sourcefrog net>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+
+/* partial change history:
+ *
+ * 2004-10-10 mbp: Lift out character type dependencies into macros.
+ *
+ * Eric Sosman pointed out that ctype functions take a parameter whose
+ * value must be that of an unsigned int, even on platforms that have
+ * negative chars in their default char type.
+ *
+ * ncdu edits:
+ * - static inline -> #define for better compatibility
+ * - don't use ctype.h, for more predictable results
+ */
+
+#include <stddef.h>	/* size_t */
+
+#include "strnatcmp.h"
+
+
+/* These are defined as macros to make it easier to adapt this code to
+ * different characters types or comparison functions. */
+#define nat_isdigit(a) ((a) >= '0' && (a) <= '9')
+#define nat_isspace(a) ((a) == ' ' || (a) == '\t' || (a) == '\r' || (a) == '\n')
+#define nat_toupper(a) (a)
+
+
+static int
+compare_right(nat_char const *a, nat_char const *b)
+{
+     int bias = 0;
+     
+     /* The longest run of digits wins.  That aside, the greatest
+	value wins, but we can't know that it will until we've scanned
+	both numbers to know that they have the same magnitude, so we
+	remember it in BIAS. */
+     for (;; a++, b++) {
+	  if (!nat_isdigit(*a)  &&  !nat_isdigit(*b))
+	       return bias;
+	  if (!nat_isdigit(*a))
+	       return -1;
+	  if (!nat_isdigit(*b))
+	       return +1;
+	  if (*a < *b) {
+	       if (!bias)
+		    bias = -1;
+	  } else if (*a > *b) {
+	       if (!bias)
+		    bias = +1;
+	  } else if (!*a  &&  !*b)
+	       return bias;
+     }
+
+     return 0;
+}
+
+
+static int
+compare_left(nat_char const *a, nat_char const *b)
+{
+     /* Compare two left-aligned numbers: the first to have a
+        different value wins. */
+     for (;; a++, b++) {
+	  if (!nat_isdigit(*a)  &&  !nat_isdigit(*b))
+	       return 0;
+	  if (!nat_isdigit(*a))
+	       return -1;
+	  if (!nat_isdigit(*b))
+	       return +1;
+	  if (*a < *b)
+	       return -1;
+	  if (*a > *b)
+	       return +1;
+     }
+
+     return 0;
+}
+
+
+static int
+strnatcmp0(nat_char const *a, nat_char const *b, int fold_case)
+{
+     int ai, bi;
+     nat_char ca, cb;
+     int fractional, result;
+
+     ai = bi = 0;
+     while (1) {
+	  ca = a[ai]; cb = b[bi];
+
+	  /* skip over leading spaces or zeros */
+	  while (nat_isspace(ca))
+	       ca = a[++ai];
+
+	  while (nat_isspace(cb))
+	       cb = b[++bi];
+
+	  /* process run of digits */
+	  if (nat_isdigit(ca)  &&  nat_isdigit(cb)) {
+	       fractional = (ca == '0' || cb == '0');
+
+	       if (fractional) {
+		    if ((result = compare_left(a+ai, b+bi)) != 0)
+			 return result;
+	       } else {
+		    if ((result = compare_right(a+ai, b+bi)) != 0)
+			 return result;
+	       }
+	  }
+
+	  if (!ca && !cb) {
+	       /* The strings compare the same.  Perhaps the caller
+                  will want to call strcmp to break the tie. */
+	       return 0;
+	  }
+
+	  if (fold_case) {
+	       ca = nat_toupper(ca);
+	       cb = nat_toupper(cb);
+	  }
+
+	  if (ca < cb)
+	       return -1;
+
+	  if (ca > cb)
+	       return +1;
+
+	  ++ai; ++bi;
+     }
+}
+
+
+int
+strnatcmp(nat_char const *a, nat_char const *b) {
+     return strnatcmp0(a, b, 0);
+}
+
+
+/* Compare, recognizing numeric string and ignoring case. */
+int
+strnatcasecmp(nat_char const *a, nat_char const *b) {
+     return strnatcmp0(a, b, 1);
+}

deps/strnatcmp.h

@@ -0,0 +1,31 @@
+/* -*- mode: c; c-file-style: "k&r" -*-
+
+  strnatcmp.c -- Perform 'natural order' comparisons of strings in C.
+  Copyright (C) 2000, 2004 by Martin Pool <mbp sourcefrog net>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+
+/* CUSTOMIZATION SECTION
+ *
+ * You can change this typedef, but must then also change the inline
+ * functions in strnatcmp.c */
+typedef char nat_char;
+
+int strnatcmp(nat_char const *a, nat_char const *b);
+int strnatcasecmp(nat_char const *a, nat_char const *b);

deps/yopt.h

@@ -1,198 +0,0 @@
-/* Copyright (c) 2012-2013 Yoran Heling
-
-  Permission is hereby granted, free of charge, to any person obtaining
-  a copy of this software and associated documentation files (the
-  "Software"), to deal in the Software without restriction, including
-  without limitation the rights to use, copy, modify, merge, publish,
-  distribute, sublicense, and/or sell copies of the Software, and to
-  permit persons to whom the Software is furnished to do so, subject to
-  the following conditions:
-
-  The above copyright notice and this permission notice shall be included
-  in all copies or substantial portions of the Software.
-
-  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
-  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
-  CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
-  TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
-  SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-*/
-
-/* This is a simple command-line option parser. Operation is similar to
- * getopt_long(), except with a cleaner API.
- *
- * This is implemented in a single header file, as it's pretty small and you
- * generally only use an option parser in a single .c file in your program.
- *
- * Supports (examples from GNU tar(1)):
- *   "--gzip"
- *   "--file <arg>"
- *   "--file=<arg>"
- *   "-z"
- *   "-f <arg>"
- *   "-f<arg>"
- *   "-zf <arg>"
- *   "-zf<arg>"
- *   "--" (To stop looking for further options)
- *   "<arg>" (Non-option arguments)
- *
- * Issues/non-features:
- * - An option either requires an argument or it doesn't.
- * - No way to specify how often an option can/should be used.
- * - No way to specify the type of an argument (filename/integer/enum/whatever)
- */
-
-
-#ifndef YOPT_H
-#define YOPT_H
-
-
-#include <string.h>
-#include <stdarg.h>
-#include <stdlib.h>
-#include <stdio.h>
-
-
-typedef struct {
-	/* Value yopt_next() will return for this option */
-	int val;
-	/* Whether this option needs an argument */
-	int needarg;
-	/* Name(s) of this option, prefixed with '-' or '--' and separated by a
-	 * comma. E.g. "-z", "--gzip", "-z,--gzip".
-	 * An option can have any number of aliases.
-	 */
-	const char *name;
-} yopt_opt_t;
-
-
-typedef struct {
-	int argc;
-	int cur;
-	int argsep; /* '--' found */
-	char **argv;
-	char *sh;
-	const yopt_opt_t *opts;
-	char errbuf[128];
-} yopt_t;
-
-
-/* opts must be an array of options, terminated with an option with val=0 */
-static inline void yopt_init(yopt_t *o, int argc, char **argv, const yopt_opt_t *opts) {
-	o->argc = argc;
-	o->argv = argv;
-	o->opts = opts;
-	o->cur = 0;
-	o->argsep = 0;
-	o->sh = NULL;
-}
-
-
-static inline const yopt_opt_t *_yopt_find(const yopt_opt_t *o, const char *v) {
-	const char *tn, *tv;
-
-	for(; o->val; o++) {
-		tn = o->name;
-		while(*tn) {
-			tv = v;
-			while(*tn && *tn != ',' && *tv && *tv != '=' && *tn == *tv) {
-				tn++;
-				tv++;
-			}
-			if(!(*tn && *tn != ',') && !(*tv && *tv != '='))
-				return o;
-			while(*tn && *tn != ',')
-				tn++;
-			while(*tn == ',')
-				tn++;
-		}
-	}
-
-	return NULL;
-}
-
-
-static inline int _yopt_err(yopt_t *o, char **val, const char *fmt, ...) {
-	va_list va;
-	va_start(va, fmt);
-	vsnprintf(o->errbuf, sizeof(o->errbuf), fmt, va);
-	va_end(va);
-	*val = o->errbuf;
-	return -2;
-}
-
-
-/* Return values:
- *  0 -> Non-option argument, val is its value
- * -1 -> Last argument has been processed
- * -2 -> Error, val will contain the error message.
- *  x -> Option with val = x found. If the option requires an argument, its
- *       value will be in val.
- */
-static inline int yopt_next(yopt_t *o, char **val) {
-	const yopt_opt_t *opt;
-	char sh[3];
-
-	*val = NULL;
-	if(o->sh)
-		goto inshort;
-
-	if(++o->cur >= o->argc)
-		return -1;
-
-	if(!o->argsep && o->argv[o->cur][0] == '-' && o->argv[o->cur][1] == '-' && o->argv[o->cur][2] == 0) {
-		o->argsep = 1;
-		if(++o->cur >= o->argc)
-			return -1;
-	}
-
-	if(o->argsep || *o->argv[o->cur] != '-') {
-		*val = o->argv[o->cur];
-		return 0;
-	}
-
-	if(o->argv[o->cur][1] != '-') {
-		o->sh = o->argv[o->cur]+1;
-		goto inshort;
-	}
-
-	/* Now we're supposed to have a long option */
-	if(!(opt = _yopt_find(o->opts, o->argv[o->cur])))
-		return _yopt_err(o, val, "Unknown option '%s'", o->argv[o->cur]);
-	if((*val = strchr(o->argv[o->cur], '=')) != NULL)
-		(*val)++;
-	if(!opt->needarg && *val)
-		return _yopt_err(o, val, "Option '%s' does not accept an argument", o->argv[o->cur]);
-	if(opt->needarg && !*val) {
-		if(o->cur+1 >= o->argc)
-			return _yopt_err(o, val, "Option '%s' requires an argument", o->argv[o->cur]);
-		*val = o->argv[++o->cur];
-	}
-	return opt->val;
-
-	/* And here we're supposed to have a short option */
-inshort:
-	sh[0] = '-';
-	sh[1] = *o->sh;
-	sh[2] = 0;
-	if(!(opt = _yopt_find(o->opts, sh)))
-		return _yopt_err(o, val, "Unknown option '%s'", sh);
-	o->sh++;
-	if(opt->needarg && *o->sh)
-		*val = o->sh;
-	else if(opt->needarg) {
-		if(++o->cur >= o->argc)
-			return _yopt_err(o, val, "Option '%s' requires an argument", sh);
-		*val = o->argv[o->cur];
-	}
-	if(!*o->sh || opt->needarg)
-		o->sh = NULL;
-	return opt->val;
-}
-
-
-#endif
-
-/* vim: set noet sw=4 ts=4: */

doc/ncdu.pod

@@ -1,445 +0,0 @@
-=head1 NAME
-
-B<ncdu> - NCurses Disk Usage
-
-
-=head1 SYNOPSIS
-
-B<ncdu> [I<options>] I<dir>
-
-
-=head1 DESCRIPTION
-
-ncdu (NCurses Disk Usage) is a curses-based version of the well-known 'du', and
-provides a fast way to see what directories are using your disk space.
-
-
-=head1 OPTIONS
-
-=head2 Mode Selection
-
-=over
-
-=item -h, --help
-
-Print a short help message and quit.
-
-=item -v, -V, --version
-
-Print ncdu version and quit.
-
-=item -f I<FILE>
-
-Load the given file, which has earlier been created with the C<-o> option. If
-I<FILE> is equivalent to C<->, the file is read from standard input.
-
-For the sake of preventing a screw-up, the current version of ncdu will assume
-that the directory information in the imported file does not represent the
-filesystem on which the file is being imported. That is, the refresh, file
-deletion and shell spawning options in the browser will be disabled.
-
-=item I<dir>
-
-Scan the given directory.
-
-=item -o I<FILE>
-
-Export all necessary information to I<FILE> instead of opening the browser
-interface. If I<FILE> is C<->, the data is written to standard output.  See the
-examples section below for some handy use cases.
-
-Be warned that the exported data may grow quite large when exporting a
-directory with many files. 10.000 files will get you an export in the order of
-600 to 700 KiB uncompressed, or a little over 100 KiB when compressed with
-gzip. This scales linearly, so be prepared to handle a few tens of megabytes
-when dealing with millions of files.
-
-=item -e
-
-Enable extended information mode. This will, in addition to the usual file
-information, also read the ownership, permissions and last modification time
-for each file. This will result in higher memory usage (by roughly ~30%) and in
-a larger output file when exporting.
-
-When using the file export/import function, this flag will need to be added
-both when exporting (to make sure the information is added to the export), and
-when importing (to read this extra information in memory). This flag has no
-effect when importing a file that has been exported without the extended
-information.
-
-This enables viewing and sorting by the latest child mtime, or modified time,
-using 'm' and 'M', respectively.
-
-=back
-
-=head2 Interface options
-
-=over
-
-=item -0
-
-Don't give any feedback while scanning a directory or importing a file, other
-than when a fatal error occurs. Ncurses will not be initialized until the scan
-is complete. When exporting the data with C<-o>, ncurses will not be
-initialized at all. This option is the default when exporting to standard
-output.
-
-=item -1
-
-Similar to C<-0>, but does give feedback on the scanning progress with a single
-line of output. This option is the default when exporting to a file.
-
-In some cases, the ncurses browser interface which you'll see after the
-scan/import is complete may look garbled when using this option. If you're not
-exporting to a file, C<-2> is probably a better choice.
-
-=item -2
-
-Provide a full-screen ncurses interface while scanning a directory or importing
-a file. This is the only interface that provides feedback on any non-fatal
-errors while scanning.
-
-=item -q
-
-Quiet mode. While scanning or importing the directory, ncdu will update the
-screen 10 times a second by default, this will be decreased to once every 2
-seconds in quiet mode. Use this feature to save bandwidth over remote
-connections. This option has no effect when C<-0> is used.
-
-=item -r
-
-Read-only mode. This will disable the built-in file deletion feature. This
-option has no effect when C<-o> is used, because there will not be a browser
-interface in that case. It has no effect when C<-f> is used, either, because
-the deletion feature is disabled in that case anyway.
-
-WARNING: This option will only prevent deletion through the file browser. It is
-still possible to spawn a shell from ncdu and delete or modify files from
-there. To disable that feature as well, pass the C<-r> option twice (see
-C<-rr>).
-
-=item -rr
-
-In addition to C<-r>, this will also disable the shell spawning feature of the
-file browser.
-
-=item --si
-
-List sizes using base 10 prefixes, that is, powers of 1000 (KB, MB, etc), as
-defined in the International System of Units (SI), instead of the usual base 2
-prefixes, that is, powers of 1024 (KiB, MiB, etc).
-
-=item --confirm-quit
-
-Requires a confirmation before quitting ncdu. Very helpful when you
-accidentally press 'q' during or after a very long scan.
-
-=item --color I<SCHEME>
-
-Select a color scheme. Currently only two schemes are recognized: I<off> to
-disable colors (the default) and I<dark> for a color scheme intended for dark
-backgrounds.
-
-=back
-
-=head2 Scan Options
-
-These options affect the scanning progress, and have no effect when importing
-directory information from a file.
-
-=over
-
-=item -x
-
-Do not cross filesystem boundaries, i.e. only count files and directories on
-the same filesystem as the directory being scanned.
-
-=item --exclude I<PATTERN>
-
-Exclude files that match I<PATTERN>. The files will still be displayed by
-default, but are not counted towards the disk usage statistics. This argument
-can be added multiple times to add more patterns.
-
-=item -X I<FILE>, --exclude-from I<FILE>
-
-Exclude files that match any pattern in I<FILE>. Patterns should be separated
-by a newline.
-
-=item --exclude-caches
-
-Exclude directories containing CACHEDIR.TAG.  The directories will still be
-displayed, but not their content, and they are not counted towards the disk
-usage statistics.
-See http://www.brynosaurus.com/cachedir/
-
-=item -L, --follow-symlinks
-
-Follow symlinks and count the size of the file they point to. As of ncdu 1.14,
-this option will not follow symlinks to directories and will count each
-symlinked file as a unique file (i.e. unlike how hard links are handled). This
-is subject to change in later versions.
-
-=item --exclude-firmlinks
-
-(MacOS only) Exclude firmlinks.
-
-=item --exclude-kernfs
-
-(Linux only) Exclude Linux pseudo filesystems, e.g. /proc (procfs), /sys (sysfs).
-
-The complete list of currently known pseudo filesystems is: binfmt, bpf, cgroup,
-cgroup2, debug, devpts, proc, pstore, security, selinux, sys, trace.
-
-=back
-
-
-=head1 KEYS
-
-=over
-
-=item ?
-
-Show help + keys + about screen
-
-=item up, down j, k
-
-Cycle through the items
-
-=item right, enter, l
-
-Open selected directory
-
-=item left, <, h
-
-Go to parent directory
-
-=item n
-
-Order by filename (press again for descending order)
-
-=item s
-
-Order by filesize (press again for descending order)
-
-=item C
-
-Order by number of items (press again for descending order)
-
-=item a
-
-Toggle between showing disk usage and showing apparent size.
-
-=item M
-
-Order by latest child mtime, or modified time. (press again for descending order)
-Requires the -e flag.
-
-=item d
-
-Delete the selected file or directory. An error message will be shown when the
-contents of the directory do not match or do not exist anymore on the
-filesystem.
-
-=item t
-
-Toggle dirs before files when sorting.
-
-=item g
-
-Toggle between showing percentage, graph, both, or none. Percentage is relative
-to the size of the current directory, graph is relative to the largest item in
-the current directory.
-
-=item c
-
-Toggle display of child item counts.
-
-=item m
-
-Toggle display of latest child mtime, or modified time. Requires the -e flag.
-
-=item e
-
-Show/hide 'hidden' or 'excluded' files and directories. Please note that even
-though you can't see the hidden files and directories, they are still there and
-they are still included in the directory sizes. If you suspect that the totals
-shown at the bottom of the screen are not correct, make sure you haven't
-enabled this option.
-
-=item i
-
-Show information about the current selected item.
-
-=item r
-
-Refresh/recalculate the current directory.
-
-=item b
-
-Spawn shell in current directory.
-
-Ncdu will determine your preferred shell from the C<NCDU_SHELL> or C<SHELL>
-variable (in that order), or will call C</bin/sh> if neither are set.  This
-allows you to also configure another command to be run when he 'b' key is
-pressed. For example, to spawn the L<vifm(1)> file manager instead of a shell,
-run ncdu as follows:
-
-  export NCDU_SHELL=vifm
-  ncdu
-
-=item q
-
-Quit
-
-=back
-
-
-=head1 FILE FLAGS
-
-Entries in the browser interface may be prefixed by a one-character flag. These
-flags have the following meaning:
-
-=over
-
-=item !
-
-An error occurred while reading this directory.
-
-=item .
-
-An error occurred while reading a subdirectory, so the indicated size may not be
-correct.
-
-=item <
-
-File or directory is excluded from the statistics by using exclude patterns.
-
-=item >
-
-Directory is on another filesystem.
-
-=item ^
-
-Directory is excluded from the statistics due to being a Linux pseudo filesystem.
-
-=item @
-
-This is neither a file nor a folder (symlink, socket, ...).
-
-=item H
-
-Same file was already counted (hard link).
-
-=item e
-
-Empty directory.
-
-=back
-
-
-=head1 EXAMPLES
-
-To scan and browse the directory you're currently in, all you need is a simple:
-
-  ncdu
-
-If you want to scan a full filesystem, your root filesystem, for example, then
-you'll want to use C<-x>:
-
-  ncdu -x /
-
-Since scanning a large directory may take a while, you can scan a directory and
-export the results for later viewing:
-
-  ncdu -1xo- / | gzip >export.gz
-  # ...some time later:
-  zcat export.gz | ncdu -f-
-
-To export from a cron job, make sure to replace C<-1> with C<-0> to suppress
-any unnecessary output.
-
-You can also export a directory and browse it once scanning is done:
-
-  ncdu -o- | tee export.file | ./ncdu -f-
-
-The same is possible with gzip compression, but is a bit kludgey:
-
-  ncdu -o- | gzip | tee export.gz | gunzip | ./ncdu -f-
-
-To scan a system remotely, but browse through the files locally:
-
-  ssh -C user@system ncdu -o- / | ./ncdu -f-
-
-The C<-C> option to ssh enables compression, which will be very useful over
-slow links. Remote scanning and local viewing has two major advantages when
-compared to running ncdu directly on the remote system: You can browse through
-the scanned directory on the local system without any network latency, and ncdu
-does not keep the entire directory structure in memory when exporting, so you
-won't consume much memory on the remote system.
-
-
-=head1 HARD LINKS
-
-Every disk usage analysis utility has its own way of (not) counting hard links.
-There does not seem to be any universally agreed method of handling hard links,
-and it is even inconsistent among different versions of ncdu. This section
-explains what each version of ncdu does.
-
-ncdu 1.5 and below does not support any hard link detection at all: each link
-is considered a separate inode and its size is counted for every link. This
-means that the displayed directory sizes are incorrect when analyzing
-directories which contain hard links.
-
-ncdu 1.6 has basic hard link detection: When a link to a previously encountered
-inode is detected, the link is considered to have a file size of zero bytes.
-Its size is not counted again, and the link is indicated in the browser
-interface with a 'H' mark. The displayed directory sizes are only correct when
-all links to an inode reside within that directory. When this is not the case,
-the sizes may or may not be correct, depending on which links were considered
-as "duplicate" and which as "original". The indicated size of the topmost
-directory (that is, the one specified on the command line upon starting ncdu)
-is always correct.
-
-ncdu 1.7 and later has improved hard link detection. Each file that has more
-than two links has the "H" mark visible in the browser interface. Each hard
-link is counted exactly once for every directory it appears in. The indicated
-size of each directory is therefore, correctly, the sum of the sizes of all
-unique inodes that can be found in that directory. Note, however, that this may
-not always be same as the space that will be reclaimed after deleting the
-directory, as some inodes may still be accessible from hard links outside it.
-
-
-=head1 BUGS
-
-Directory hard links are not supported. They will not be detected as being hard
-links, and will thus be scanned and counted multiple times.
-
-Some minor glitches may appear when displaying filenames that contain multibyte
-or multicolumn characters.
-
-All sizes are internally represented as a signed 64bit integer. If you have a
-directory larger than 8 EiB minus one byte, ncdu will clip its size to 8 EiB
-minus one byte. When deleting items in a directory with a clipped size, the
-resulting sizes will be incorrect.
-
-Item counts are stored in a signed 32-bit integer without overflow detection.
-If you have a directory with more than 2 billion files, quite literally
-anything can happen.
-
-On macOS 10.15 and later, running ncdu on the root directory without
-`--exclude-firmlinks` may cause directories to be scanned and counted multiple
-times. Firmlink cycles are currently (1.15.1) not detected, so it may also
-cause ncdu to get stuck in an infinite loop and eventually run out of memory.
-
-Please report any other bugs you may find at the bug tracker, which can be
-found on the web site at https://dev.yorhel.nl/ncdu
-
-
-=head1 AUTHOR
-
-Written by Yoran Heling <projects@yorhel.nl>.
-
-
-=head1 SEE ALSO
-
-L<du(1)>

ncdu.1

@@ -0,0 +1,513 @@
+.\" SPDX-FileCopyrightText: Yorhel <projects@yorhel.nl>
+.\" SPDX-License-Identifier: MIT
+.Dd March 5, 2025
+.Dt NCDU 1
+.Os
+.Sh NAME
+.Nm ncdu
+.Nd NCurses Disk Usage
+.
+.Sh SYNOPSIS
+.Nm
+.Op Fl f Ar file
+.Op Fl o Ar file
+.Op Fl e , \-extended , \-no\-extended
+.Op Fl \-ignore\-config
+.Op Fl x , \-one\-file\-system , \-cross\-file\-system
+.Op Fl \-exclude Ar pattern
+.Op Fl X , \-exclude\-from Ar file
+.Op Fl \-include\-caches , \-exclude\-caches
+.Op Fl L , \-follow\-symlinks , \-no\-follow\-symlinks
+.Op Fl \-include\-kernfs , \-exclude\-kernfs
+.Op Fl \-exclude\-firmlinks , \-follow\-firmlinks
+.Op Fl 0 , 1 , 2
+.Op Fl q , \-slow\-ui\-updates , \-fast\-ui\-updates
+.Op Fl \-enable\-shell , \-disable\-shell
+.Op Fl \-enable\-delete , \-disable\-delete
+.Op Fl \-enable\-refresh , \-disable\-refresh
+.Op Fl r
+.Op Fl \-si , \-no\-si
+.Op Fl \-disk\-usage , \-apparent\-size
+.Op Fl \-show\-hidden , \-hide\-hidden
+.Op Fl \-show\-itemcount , \-hide\-itemcount
+.Op Fl \-show\-mtime , \-hide\-mtime
+.Op Fl \-show\-graph , \-hide\-graph
+.Op Fl \-show\-percent , \-hide\-percent
+.Op Fl \-graph\-style Ar hash | half\-block | eighth\-block
+.Op Fl \-sort Ar column
+.Op Fl \-enable\-natsort , \-disable\-natsort
+.Op Fl \-group\-directories\-first , \-no\-group\-directories\-first
+.Op Fl \-confirm\-quit , \-no\-confirm\-quit
+.Op Fl \-confirm\-delete , \-no\-confirm\-delete
+.Op Fl \-color Ar off | dark | dark-bg
+.Op Ar path
+.Nm
+.Op Fl h , \-help
+.Nm
+.Op Fl v , V , \-version
+.
+.Sh DESCRIPTION
+.Nm
+(NCurses Disk Usage) is an interactive curses-based version of the well-known
+.Xr du 1 ,
+and provides a fast way to see what directories are using your disk space.
+.
+.Sh OPTIONS
+.Ss Mode Selection
+.Bl -tag -width Ds
+.It Fl h , \-help
+Print a short help message and quit.
+.It Fl v , V , \-version
+Print version and quit.
+.It Fl f Ar file
+Load the given file, which has earlier been created with the
+.Fl o
+flag.
+If
+.Ar file
+is equivalent to '\-', the file is read from standard input.
+.Pp
+For the sake of preventing a screw-up, the current version of
+.Nm
+will assume that the directory information in the imported file does not
+represent the filesystem on which the file is being imported.
+That is, the refresh, file deletion and shell spawning options in the browser
+will be disabled.
+.It Ar dir
+Scan the given directory.
+.It Fl o Ar file
+Export all necessary information to
+.Ar file
+instead of opening the browser interface.
+If
+.Ar file
+is '\-', the data is written to standard output.
+See the examples section below for some handy use cases.
+.Pp
+Be warned that the exported data may grow quite large when exporting a
+directory with many files.
+10.000 files will get you an export in the order of 600 to 700 KiB
+uncompressed, or a little over 100 KiB when compressed with gzip.
+This scales linearly, so be prepared to handle a few tens of megabytes when
+dealing with millions of files.
+.It Fl e , \-extended , \-no\-extended
+Enable/disable extended information mode.
+This will, in addition to the usual file information, also read the ownership,
+permissions and last modification time for each file.
+This will result in higher memory usage (by roughly ~30%) and in a larger
+output file when exporting.
+.Pp
+When using the file export/import function, this flag should be added both when
+exporting (to make sure the information is added to the export) and when
+importing (to read this extra information in memory).
+This flag has no effect when importing a file that has been exported without
+the extended information.
+.Pp
+This enables viewing and sorting by the latest child mtime, or modified time,
+using 'm' and 'M', respectively.
+.It Fl \-ignore\-config
+Do not attempt to load any configuration files.
+.El
+.
+.Ss Scan Options
+These options affect the scanning progress, they have no effect when importing
+directory information from a file.
+.Bl -tag -width Ds
+.It Fl x , \-one\-file\-system
+Do not cross filesystem boundaries, i.e. only count files and directories on
+the same filesystem as the directory being scanned.
+.It Fl \-cross\-file\-system
+Do cross filesystem boundaries.
+This is the default, but can be specified to overrule a previously configured
+.Fl x .
+.It Fl \-exclude Ar pattern
+Exclude files that match
+.Ar pattern .
+The files are still displayed by default, but are not counted towards the disk
+usage statistics.
+This argument can be added multiple times to add more patterns.
+.It Fl X , \-exclude\-from Ar file
+Exclude files that match any pattern in
+.Ar file .
+Patterns should be separated by a newline.
+.It Fl \-include\-caches , \-exclude\-caches
+Include (default) or exclude directories containing
+.Pa CACHEDIR.TAG .
+Excluded cache directories are still displayed, but their contents will not be
+scanned or counted towards the disk usage statistics.
+.Lk https://bford.info/cachedir/
+.It Fl L , \-follow\-symlinks , \-no\-follow\-symlinks
+Follow (or not) symlinks and count the size of the file they point to.
+This option does not follow symlinks to directories and will cause each
+symlinked file to count as a unique file.
+This is different from how hard links are handled.
+The exact counting behavior of this flag is subject to change in the future.
+.It Fl \-include\-kernfs , \-exclude\-kernfs
+(Linux only) Include (default) or exclude Linux pseudo filesystems such as
+.Pa /proc
+(procfs) and
+.Pa /sys
+(sysfs).
+.Pp
+The complete list of currently known pseudo filesystems is: binfmt, bpf, cgroup,
+cgroup2, debug, devpts, proc, pstore, security, selinux, sys, trace.
+.It Fl \-exclude\-firmlinks , \-follow\-firmlinks
+(MacOS only) Exclude or follow firmlinks.
+.El
+.Ss Interface Options
+.Bl -tag -width Ds
+.It Fl 0
+Don't give any feedback while scanning a directory or importing a file, except
+when a fatal error occurs.
+Ncurses will not be initialized until the scan is complete.
+When exporting the data with
+.Fl o ,
+ncurses will not be initialized at all.
+This option is the default when exporting to standard output.
+.It Fl 1
+Write progress information to the terminal, but don't open a full-screen
+ncurses interface.
+This option is the default when exporting to a file.
+.Pp
+In some cases, the ncurses browser interface which you'll see after the
+scan/import is complete may look garbled when using this option.
+If you're not exporting to a file,
+.Fl 2
+is usually a better choice.
+.It Fl 2
+Show a full-screen ncurses interface while scanning a directory or importing
+a file.
+This is the only interface that provides feedback on any non-fatal errors while
+scanning.
+.It Fl q , \-slow\-ui\-updates , \-fast\-ui\-updates
+Change the UI update interval while scanning or importing.
+.Nm
+updates the screen 10 times a second by default (with
+.Fl \-fast\-ui\-updates
+), this can be decreased to once every 2 seconds with
+.Fl q
+or
+.Fl \-slow\-ui\-updates .
+This option can be used to save bandwidth over remote connections.
+This option has no effect in combination with
+.Fl 0 .
+.It Fl \-enable\-shell , \-disable\-shell
+Enable or disable shell spawning from the file browser.
+This feature is enabled by default when scanning a live directory and disabled
+when importing from file.
+.It Fl \-enable\-delete , \-disable\-delete
+Enable or disable the built-in file deletion feature.
+This feature is enabled by default when scanning a live directory and disabled
+when importing from file.
+Explicitly disabling the deletion feature can work as a safeguard to prevent
+accidental data loss.
+.It Fl \-enable\-refresh , \-disable\-refresh
+Enable or disable directory refreshing from the file browser.
+This feature is enabled by default when scanning a live directory and disabled
+when importing from file.
+.It Fl r
+Read-only mode.
+When given once, this is an alias for
+.Fl \-disable\-delete ,
+when given twice it will also add
+.Fl \-disable\-shell ,
+thus ensuring that there is no way to modify the file system from within
+.Nm .
+.It Fl \-si , \-no\-si
+List sizes using base 10 prefixes, that is, powers of 1000 (kB, MB, etc), as
+defined in the International System of Units (SI), instead of the usual base 2
+prefixes (KiB, MiB, etc).
+.It Fl \-disk\-usage , \-apparent\-size
+Select whether to display disk usage (default) or apparent sizes.
+Can also be toggled in the file browser with the 'a' key.
+.It Fl \-show\-hidden , \-hide\-hidden
+Show (default) or hide "hidden" and excluded files.
+Can also be toggled in the file browser with the 'e' key.
+.It Fl \-show\-itemcount , \-hide\-itemcount
+Show or hide (default) the item counts column.
+Can also be toggled in the file browser with the 'c' key.
+.It Fl \-show\-mtime , \-hide\-mtime
+Show or hide (default) the last modification time column.
+Can also be toggled in the file browser with the 'm' key.
+This option is ignored when not in extended mode, see
+.Fl e .
+.It Fl \-show\-graph , \-hide\-graph
+Show (default) or hide the relative size bar column.
+Can also be toggled in the file browser with the 'g' key.
+.It Fl \-show\-percent , \-hide\-percent
+Show (default) or hide the relative size percent column.
+Can also be toggled in the file browser with the 'g' key.
+.It Fl \-graph\-style Ar hash | half\-block | eighth\-block
+Change the way that the relative size bar column is drawn.
+Recognized values are
+.Ar hash
+to draw ASCII '#' characters (default and most portable),
+.Ar half\-block
+to use half-block drawing characters or
+.Ar eighth\-block
+to use eighth-block drawing characters.
+Eighth-block characters are the most precise but may not render correctly in
+all terminals.
+.It Fl \-sort Ar column
+Change the default column to sort on.
+Accepted values are
+.Ar disk\-usage
+(the default),
+.Ar name , apparent\-size , itemcount
+or
+.Ar mtime .
+The latter only makes sense in extended mode, see
+.Fl e .
+.Pp
+The column name can be suffixed with
+.Li \-asc
+or
+.Li \-desc
+to change the order to ascending or descending, respectively.
+For example,
+.Li \-\-sort=name\-desc
+to sort by name in descending order.
+.It Fl \-enable\-natsort , \-disable\-natsort
+Enable (default) or disable natural sort when sorting by file name.
+.It Fl \-group\-directories\-first , \-no\-group\-directories\-first
+Sort (or not) directories before files.
+.It Fl \-confirm\-quit , \-no\-confirm\-quit
+Require a confirmation before quitting ncdu.
+Can be helpful when you accidentally press 'q' during or after a very long scan.
+.It Fl \-confirm\-delete , \-no\-confirm\-delete
+Require a confirmation before deleting a file or directory.
+Enabled by default, but can be disabled if you're absolutely sure you won't
+accidentally press 'd'.
+.It Fl \-color Ar off | dark | dark-bg
+Set the color scheme.
+The following schemes are recognized:
+.Ar off
+to disable colors,
+.Ar dark
+for a color scheme intended for dark backgrounds and
+.Ar dark\-bg
+for a variation of the
+.Ar dark
+color scheme that also works in terminals with a light background.
+.Pp
+The default is
+.Ar off .
+.El
+.
+.Sh CONFIGURATION
+.Nm
+can be configured by placing command-line options in
+.Pa /etc/ncdu.conf
+or
+.Pa $HOME/.config/ncdu/config .
+If both files exist, the system configuration will be loaded before the user
+configuration, allowing users to override options set in the system
+configuration.
+Options given on the command line will override options set in the
+configuration files.
+The files will not be read at all when
+.Fl \-ignore\-config
+is given on the command line.
+.Pp
+The configuration file format is simply one command line option per line.
+Lines starting with '#' are ignored.
+A line can be prefixed with '@' to suppress errors while parsing the option.
+Example configuration file:
+.Bd -literal -offset indent
+# Always enable extended mode
+\-e
+
+# Disable file deletion
+\-\-disable\-delete
+
+# Exclude .git directories
+\-\-exclude .git
+
+# Read excludes from ~/.ncduexcludes, ignore error if the file does not exist
+@--exclude-from ~/.ncduexcludes
+.Ed
+.
+.Sh KEYS
+.Bl -tag -width Ds
+.It ?
+Open help + keys + about screen
+.It up , down , j , k
+Cycle through the items
+.It right, enter, l
+Open selected directory
+.It left, <, h
+Go to parent directory
+.It n
+Order by filename (press again for descending order)
+.It s
+Order by filesize (press again for descending order)
+.It C
+Order by number of items (press again for descending order)
+.It a
+Toggle between showing disk usage and showing apparent size.
+.It M
+Order by latest child mtime, or modified time (press again for descending
+order).
+Requires the
+.Fl e
+flag.
+.It d
+Delete the selected file or directory.
+An error message will be shown when the contents of the directory do not match
+or do not exist anymore on the filesystem.
+.It t
+Toggle dirs before files when sorting.
+.It g
+Toggle between showing percentage, graph, both, or none.
+Percentage is relative to the size of the current directory, graph is relative
+to the largest item in the current directory.
+.It c
+Toggle display of child item counts.
+.It m
+Toggle display of latest child mtime, or modified time.
+Requires the
+.Fl e
+flag.
+.It e
+Show/hide 'hidden' or 'excluded' files and directories.
+Be aware that even if you can't see the hidden files and directories, they are
+still there and they are still included in the directory sizes.
+If you suspect that the totals shown at the bottom of the screen are not
+correct, make sure you haven't enabled this option.
+.It i
+Show information about the current selected item.
+.It r
+Refresh/recalculate the current directory.
+.It b
+Spawn shell in current directory.
+.Pp
+.Nm
+determines your preferred shell from the
+.Ev NCDU_SHELL
+or
+.Ev SHELL
+environment variable (in that order), or calls
+.Pa /bin/sh
+if neither are set.
+This allows you to also configure another command to be run when he 'b' key is
+pressed.
+For example, to spawn the
+.Xr vifm 1
+file manager instead of a shell, run
+.Nm
+as follows:
+.Dl NCDU_SHELL=vifm ncdu
+The
+.Ev NCDU_LEVEL
+environment variable is set or incremented before spawning the shell, allowing
+you to detect if your shell is running from within
+.Nm .
+This can be useful to avoid nesting multiple instances, although
+.Nm
+itself does not (currently) warn about or prevent this situation.
+.It q
+Quit
+.El
+.
+.Sh FILE FLAGS
+Entries in the browser interface may be prefixed by a one\-character flag.
+These flags have the following meaning:
+.Bl -tag -width Ds
+.It !
+An error occurred while reading this directory.
+.It \.
+An error occurred while reading a subdirectory, so the indicated size may not
+be correct.
+.It <
+File or directory is excluded from the statistics by using exclude patterns.
+.It >
+Directory is on another filesystem.
+.It ^
+Directory is excluded from the statistics due to being a Linux pseudo
+filesystem.
+.It @
+This is neither a file nor a folder (symlink, socket, ...).
+.It H
+Same file was already counted (hard link).
+.It e
+Empty directory.
+.El
+.
+.Sh EXAMPLES
+To scan and browse the directory you're currently in, all you need is a simple:
+.Dl ncdu
+To scan a full filesystem, for example your root filesystem, you'll want to use
+.Fl x :
+.Dl ncdu \-x /
+.Pp
+Since scanning a large directory may take a while, you can scan a directory and
+export the results for later viewing:
+.Bd -literal -offset indent
+ncdu \-1xo\- / | gzip >export.gz
+# ...some time later:
+zcat export.gz | ncdu \-f\-
+.Ed
+To export from a cron job, make sure to replace
+.Fl 1
+with
+.Fl 0
+to suppress unnecessary progress output.
+.Pp
+You can also export a directory and browse it once scanning is done:
+.Dl ncdu \-o\- | tee export.file | ./ncdu \-f\-
+The same is possible with gzip compression, but is a bit kludgey:
+.Dl ncdu \-o\- | gzip | tee export.gz | gunzip | ./ncdu \-f\-
+.Pp
+To scan a system remotely, but browse through the files locally:
+.Dl ssh \-C user@system ncdu \-o\- / | ./ncdu \-f\-
+The
+.Fl C
+option to ssh enables compression, which will be very useful over slow links.
+Remote scanning and local viewing has two major advantages when
+compared to running
+.Nm
+directly on the remote system: You can browse through the scanned directory on
+the local system without any network latency, and
+.Nm
+does not keep the entire directory structure in memory when exporting, so this
+won't consume much memory on the remote system.
+.
+.Sh SEE ALSO
+.Xr du 1 ,
+.Xr tree 1 .
+.Pp
+.Nm
+has a website:
+.Lk https://dev.yorhel.nl/ncdu
+.
+.Sh AUTHORS
+Written by
+.An Yorhel Aq Mt projects@yorhel.nl
+.
+.Sh BUGS
+Directory hard links are not supported.
+They are not detected as being hard links, and will thus get scanned and
+counted multiple times.
+.Pp
+Some minor glitches may appear when displaying filenames that contain multibyte
+or multicolumn characters.
+.Pp
+All sizes are internally represented as a signed 64bit integer.
+If you have a directory larger than 8 EiB minus one byte, ncdu will clip its
+size to 8 EiB minus one byte.
+When deleting or refreshing items in a directory with a clipped size, the
+resulting sizes will be incorrect.
+Item counts are stored in a 32-bit integer without overflow detection.
+If you have a directory with more than 2 billion files, quite literally
+anything can happen.
+.Pp
+On macOS 10.15 and later, running ncdu on the root directory without
+.Fl \-exclude\-firmlinks
+may cause directories to be scanned and counted multiple times.
+Firmlink cycles are not detected, so it may also cause
+.Nm
+to get stuck in an infinite loop and eventually run out of memory.
+.Pp
+Please report any other bugs you may find at the bug tracker, which can be
+found on the web site at
+.Lk https://dev.yorhel.nl/ncdu

src/browser.c

@@ -1,6 +1,6 @@
 /* ncdu - NCurses Disk Usage
 
-  Copyright (c) 2007-2020 Yoran Heling
+  Copyright (c) Yorhel
 
   Permission is hereby granted, free of charge, to any person obtaining
   a copy of this software and associated documentation files (the
@@ -31,7 +31,7 @@
 #include <time.h>
 
 
-static int graph = 1, show_as = 0, info_show = 0, info_page = 0, info_start = 0, show_items = 0, show_mtime = 0;
+static int info_show = 0, info_page = 0, info_start = 0;
 static const char *message = NULL;
 
 
@@ -68,15 +68,21 @@ static void browse_draw_info(struct dir *dr) {
 
     ncaddstr(2,  9, cropstr(dr->name, 49));
     ncaddstr(3,  9, cropstr(getpath(dr->parent), 49));
-    ncaddstr(4,  9, dr->flags & FF_DIR ? "Directory" : dr->flags & FF_FILE ? "File" : "Other");
 
-    if(e) {
-      ncaddstr(4, 9, fmtmode(e->mode));
-      ncprint(4, 26, "%d", e->uid);
-      ncprint(4, 38, "%d", e->gid);
+    if(!e)
+      ncaddstr(4,  9, dr->flags & FF_DIR ? "Directory" : dr->flags & FF_FILE ? "File" : "Other");
+    else {
       time_t t = (time_t)e->mtime;
-      strftime(mbuf, sizeof(mbuf), "%Y-%m-%d %H:%M:%S %z", localtime(&t));
-      ncaddstr(5, 18, mbuf);
+      if(e->flags & FFE_MODE) ncaddstr(4, 9, fmtmode(e->mode));
+      else ncaddstr(4, 9, "N/A");
+      if(e->flags & FFE_UID) ncprint(4, 26, "%u", e->uid);
+      else ncaddstr(4, 26, "N/A");
+      if(e->flags & FFE_GID) ncprint(4, 38, "%u", e->gid);
+      else ncaddstr(4, 38, "N/A");
+      if(e->flags & FFE_MTIME) {
+        strftime(mbuf, sizeof(mbuf), "%Y-%m-%d %H:%M:%S %z", localtime(&t));
+        ncaddstr(5, 18, mbuf);
+      } else ncaddstr(5, 18, "N/A");
     }
 
     ncmove(6, 18);
@@ -130,9 +136,16 @@ static void browse_draw_flag(struct dir *n, int *x) {
 }
 
 
+const char *graph_styles[3][9] = {
+  { " ", " ", " ", " ", " ", " ", " ", " ", "#" },
+  { " ", " ", " ", " ", "▌", "▌", "▌", "▌", "█" },
+  { " ", "▏", "▎", "▍", "▌", "▋", "▊", "▉", "█" },
+};
+
 static void browse_draw_graph(struct dir *n, int *x) {
   float pc = 0.0f;
-  int o, i, bar_size = wincols/7 > 10 ? wincols/7 : 10;
+  int64_t max, num, perblock, frac;
+  int i, bar_size = wincols/7 > 10 ? wincols/7 : 10;
   enum ui_coltype c = n->flags & FF_BSEL ? UIC_SEL : UIC_DEFAULT;
 
   if(!graph)
@@ -160,9 +173,21 @@ static void browse_draw_graph(struct dir *n, int *x) {
   /* graph (10+ columns) */
   if(graph == 1 || graph == 3) {
     uic_set(c == UIC_SEL ? UIC_GRAPH_SEL : UIC_GRAPH);
-    o = (int)((float)bar_size*(float)(show_as ? n->asize : n->size) / (float)(show_as ? dirlist_maxa : dirlist_maxs));
-    for(i=0; i<bar_size; i++)
-      addch(i < o ? '#' : ' ');
+    max = show_as ? dirlist_maxa : dirlist_maxs;
+    num = show_as ? n->asize : n->size;
+    if (max < bar_size) {
+        max *= bar_size;
+        num *= bar_size;
+    } else if (max > ((int64_t)1)<<56) { /* Prevent overflow in calculation below */
+        max <<= 5;
+        num <<= 5;
+    }
+    perblock = max / bar_size;
+    for(i=0; i<bar_size; i++) {
+      frac = (num * 8) / (perblock < 1 ? 1 : perblock);
+      addstr(graph_styles[graph_style][frac > 8 ? 8 : frac < 0 ? 0 : frac]);
+      num -= perblock;
+    }
   }
 
   addchc(c, ']');
@@ -256,7 +281,7 @@ static void browse_draw_item(struct dir *n, int row) {
 }
 
 
-void browse_draw() {
+void browse_draw(void) {
   struct dir *t;
   const char *tmp;
   int selected = 0, i;
@@ -272,7 +297,7 @@ void browse_draw() {
   addstrc(UIC_HD, " for help");
   if(dir_import_active)
     mvaddstr(0, wincols-10, "[imported]");
-  else if(read_only)
+  else if(!can_delete)
     mvaddstr(0, wincols-11, "[read-only]");
 
   /* second line - the path */
@@ -288,12 +313,19 @@ void browse_draw() {
   uic_set(UIC_HD);
   mvhline(winrows-1, 0, ' ', wincols);
   if(t) {
-    mvaddstr(winrows-1, 0, " Total disk usage: ");
+    if(!show_as) attron(A_BOLD);
+    mvaddchc(UIC_HD, winrows-1, 0, show_as ? ' ' : '*');
+    addstr("Total disk usage: ");
+    if(!show_as) attroff(A_BOLD);
     printsize(UIC_HD, t->parent->size);
-    addstrc(UIC_HD, "  Apparent size: ");
+    if(show_as) attron(A_BOLD);
+    addstrc(UIC_HD, "  ");
+    addchc(UIC_HD, show_as ? '*' : ' ');
+    addstrc(UIC_HD, "Apparent size: ");
+    if(show_as) attroff(A_BOLD);
     uic_set(UIC_NUM_HD);
     printsize(UIC_HD, t->parent->asize);
-    addstrc(UIC_HD, "  Items: ");
+    addstrc(UIC_HD, "   Items: ");
     uic_set(UIC_NUM_HD);
     printw("%d", t->parent->items);
   } else
@@ -319,7 +351,7 @@ void browse_draw() {
   if(message) {
     nccreate(6, 60, "Message");
     ncaddstr(2, 2, message);
-    ncaddstr(4, 34, "Press any key to continue");
+    ncaddstr(4, 33, "Press any key to continue");
   }
 
   /* draw information window */
@@ -484,8 +516,8 @@ int browse_key(int ch) {
 
     /* and other stuff */
     case 'r':
-      if(dir_import_active) {
-        message = "Directory imported from file, won't refresh.";
+      if(!can_refresh) {
+        message = "Directory refresh feature disabled.";
         break;
       }
       if(dirlist_par) {
@@ -523,14 +555,12 @@ int browse_key(int ch) {
       info_show = 0;
       break;
     case 'd':
-      if(read_only >= 1 || dir_import_active) {
-        message = read_only >= 1
-          ? "File deletion disabled in read-only mode."
-          : "File deletion not available for imported directories.";
-        break;
-      }
       if(sel == NULL || sel == dirlist_parent)
         break;
+      if(!can_delete) {
+        message = "Deletion feature disabled.";
+        break;
+      }
       info_show = 0;
       if((t = dirlist_get(1)) == sel)
         if((t = dirlist_get(-1)) == sel || t == dirlist_parent)
@@ -538,10 +568,8 @@ int browse_key(int ch) {
       delete_init(sel, t);
       break;
      case 'b':
-      if(read_only >= 2 || dir_import_active) {
-        message = read_only >= 2
-          ? "Shell feature disabled in read-only mode."
-          : "Shell feature not available for imported directories.";
+      if(!can_shell) {
+        message = "Shell feature disabled.";
         break;
       }
       shell_init();

src/browser.h

@@ -1,6 +1,6 @@
 /* ncdu - NCurses Disk Usage
 
-  Copyright (c) 2007-2020 Yoran Heling
+  Copyright (c) Yorhel
 
   Permission is hereby granted, free of charge, to any person obtaining
   a copy of this software and associated documentation files (the

src/delete.c

@@ -1,6 +1,6 @@
 /* ncdu - NCurses Disk Usage
 
-  Copyright (c) 2007-2020 Yoran Heling
+  Copyright (c) Yorhel
 
   Permission is hereby granted, free of charge, to any person obtaining
   a copy of this software and associated documentation files (the
@@ -35,9 +35,10 @@
 #define DS_PROGRESS 1
 #define DS_FAILED   2
 
+int delete_confirm = 1;
 
 static struct dir *root, *nextsel, *curdir;
-static char noconfirm = 0, ignoreerr = 0, state;
+static char ignoreerr = 0, state;
 static signed char seloption;
 static int lasterrno;
 
@@ -98,7 +99,7 @@ static void delete_draw_error(void) {
 }
 
 
-void delete_draw() {
+void delete_draw(void) {
   browse_draw();
   switch(state) {
     case DS_CONFIRM:  delete_draw_confirm();  break;
@@ -126,7 +127,7 @@ int delete_key(int ch) {
         if(seloption == 1)
           return 1;
         if(seloption == 2)
-          noconfirm++;
+          delete_confirm = 0;
         state = DS_PROGRESS;
         break;
       case 'q':
@@ -211,12 +212,12 @@ delete_nxt:
 }
 
 
-void delete_process() {
+void delete_process(void) {
   struct dir *par;
 
   /* confirm */
   seloption = 1;
-  while(state == DS_CONFIRM && !noconfirm)
+  while(state == DS_CONFIRM && delete_confirm)
     if(input_handle(0)) {
       browse_init(root->parent);
       return;

src/delete.h

@@ -1,6 +1,6 @@
 /* ncdu - NCurses Disk Usage
 
-  Copyright (c) 2007-2020 Yoran Heling
+  Copyright (c) Yorhel
 
   Permission is hereby granted, free of charge, to any person obtaining
   a copy of this software and associated documentation files (the
@@ -28,6 +28,8 @@
 
 #include "global.h"
 
+extern int delete_confirm;
+
 void delete_process(void);
 int  delete_key(int);
 void delete_draw(void);

src/dir.h

@@ -1,6 +1,6 @@
 /* ncdu - NCurses Disk Usage
 
-  Copyright (c) 2007-2020 Yoran Heling
+  Copyright (c) Yorhel
 
   Permission is hereby granted, free of charge, to any person obtaining
   a copy of this software and associated documentation files (the
@@ -69,7 +69,7 @@ struct dir_output {
    * The function should return non-zero on error, at which point errno is
    * assumed to be set to something sensible.
    */
-  int (*item)(struct dir *, const char *, struct dir_ext *);
+  int (*item)(struct dir *, const char *, struct dir_ext *, unsigned int);
 
   /* Finalizes the output to go to the next program state or exit ncdu. Called
    * after item(NULL) has been called for the root item or before any item()
@@ -107,16 +107,13 @@ extern int (*dir_process)(void);
 
 /* Scanning a live directory */
 extern int dir_scan_smfs;
+extern int exclude_kernfs;
 void dir_scan_init(const char *path);
 
 /* Importing a file */
 extern int dir_import_active;
 int dir_import_init(const char *fn);
 
-#if HAVE_LINUX_MAGIC_H && HAVE_SYS_STATFS_H && HAVE_STATFS
-extern int exclude_kernfs;
-#endif
-
 
 /* The currently configured output functions. */
 extern struct dir_output dir_output;

src/dir_common.c

@@ -1,6 +1,6 @@
 /* ncdu - NCurses Disk Usage
 
-  Copyright (c) 2007-2020 Yoran Heling
+  Copyright (c) Yorhel
 
   Permission is hereby granted, free of charge, to any person obtaining
   a copy of this software and associated documentation files (the
@@ -35,7 +35,7 @@ int (*dir_process)(void);
 char *dir_curpath;   /* Full path of the last seen item. */
 struct dir_output dir_output;
 char *dir_fatalerr; /* Error message on a fatal error. (NULL if there was no fatal error) */
-int dir_ui;         /* User interface to use */
+int dir_ui = -1;    /* User interface to use */
 static int confirm_quit_while_scanning_stage_1_passed; /* Additional check before quitting */
 static char *lasterr; /* Path where the last error occurred. */
 static int curpathl; /* Allocated length of dir_curpath */
@@ -65,7 +65,7 @@ void dir_curpath_enter(const char *name) {
 
 
 /* removes last component from dir_curpath */
-void dir_curpath_leave() {
+void dir_curpath_leave(void) {
   char *tmp;
   if((tmp = strrchr(dir_curpath, '/')) == NULL)
     strcpy(dir_curpath, "/");
@@ -77,13 +77,14 @@ void dir_curpath_leave() {
 
 
 void dir_setlasterr(const char *path) {
+  int req;
   if(!path) {
     free(lasterr);
     lasterr = NULL;
     lasterrl = 0;
     return;
   }
-  int req = strlen(path)+1;
+  req = strlen(path)+1;
   if(lasterrl < req) {
     lasterrl = req;
     lasterr = xrealloc(lasterr, lasterrl);
@@ -93,12 +94,12 @@ void dir_setlasterr(const char *path) {
 
 
 void dir_seterr(const char *fmt, ...) {
+  va_list va;
   free(dir_fatalerr);
   dir_fatalerr = NULL;
   if(!fmt)
     return;
 
-  va_list va;
   va_start(va, fmt);
   dir_fatalerr = xmalloc(1024); /* Should be enough for everything... */
   vsnprintf(dir_fatalerr, 1023, fmt, va);
@@ -179,7 +180,7 @@ static void draw_error(char *cur, char *msg) {
 }
 
 
-void dir_draw() {
+void dir_draw(void) {
   float f;
   const char *unit;
 

src/dir_export.c

@@ -1,6 +1,6 @@
 /* ncdu - NCurses Disk Usage
 
-  Copyright (c) 2007-2020 Yoran Heling
+  Copyright (c) Yorhel
 
   Permission is hereby granted, free of charge, to any person obtaining
   a copy of this software and associated documentation files (the
@@ -74,7 +74,7 @@ static void output_int(uint64_t n) {
 }
 
 
-static void output_info(struct dir *d, const char *name, struct dir_ext *e) {
+static void output_info(struct dir *d, const char *name, struct dir_ext *e, unsigned int nlink) {
   if(!extended_info || !(d->flags & FF_EXT))
     e = NULL;
 
@@ -96,23 +96,32 @@ static void output_info(struct dir *d, const char *name, struct dir_ext *e) {
     fputs(",\"dev\":", stream);
     output_int(d->dev);
   }
-  fputs(",\"ino\":", stream);
-  output_int(d->ino);
 
   if(e) {
-    fputs(",\"uid\":", stream);
-    output_int(e->uid);
-    fputs(",\"gid\":", stream);
-    output_int(e->gid);
-    fputs(",\"mode\":", stream);
-    output_int(e->mode);
-    fputs(",\"mtime\":", stream);
-    output_int(e->mtime);
+    if(e->flags & FFE_UID) {
+      fputs(",\"uid\":", stream);
+      output_int(e->uid);
+    }
+    if(e->flags & FFE_GID) {
+      fputs(",\"gid\":", stream);
+      output_int(e->gid);
+    }
+    if(e->flags & FFE_MODE) {
+      fputs(",\"mode\":", stream);
+      output_int(e->mode);
+    }
+    if(e->flags & FFE_MTIME) {
+      fputs(",\"mtime\":", stream);
+      output_int(e->mtime);
+    }
   }
 
-  /* TODO: Including the actual number of links would be nicer. */
-  if(d->flags & FF_HLNKC)
-    fputs(",\"hlnkc\":true", stream);
+  if(d->flags & FF_HLNKC) {
+    fputs(",\"ino\":", stream);
+    output_int(d->ino);
+    fputs(",\"hlnkc\":true,\"nlink\":", stream);
+    output_int(nlink);
+  }
   if(d->flags & FF_ERR)
     fputs(",\"read_error\":true", stream);
   /* excluded/error'd files are "unknown" with respect to the "notreg" field. */
@@ -121,7 +130,7 @@ static void output_info(struct dir *d, const char *name, struct dir_ext *e) {
   if(d->flags & FF_EXL)
     fputs(",\"excluded\":\"pattern\"", stream);
   else if(d->flags & FF_OTHFS)
-    fputs(",\"excluded\":\"othfs\"", stream);
+    fputs(",\"excluded\":\"otherfs\"", stream);
   else if(d->flags & FF_KERNFS)
     fputs(",\"excluded\":\"kernfs\"", stream);
   else if(d->flags & FF_FRMLNK)
@@ -136,7 +145,7 @@ static void output_info(struct dir *d, const char *name, struct dir_ext *e) {
  * item() call do we check for ferror(). This greatly simplifies the code, but
  * assumes that calls to fwrite()/fput./etc don't do any weird stuff when
  * called with a stream that's in an error state. */
-static int item(struct dir *item, const char *name, struct dir_ext *ext) {
+static int item(struct dir *item, const char *name, struct dir_ext *ext, unsigned int nlink) {
   if(!item) {
     nstack_pop(&stack);
     if(!stack.top) { /* closing of the root item */
@@ -152,7 +161,7 @@ static int item(struct dir *item, const char *name, struct dir_ext *ext) {
   /* File header.
    * TODO: Add scan options? */
   if(!stack.top) {
-    fputs("[1,1,{\"progname\":\""PACKAGE"\",\"progver\":\""PACKAGE_VERSION"\",\"timestamp\":", stream);
+    fputs("[1,2,{\"progname\":\""PACKAGE"\",\"progver\":\""PACKAGE_VERSION"\",\"timestamp\":", stream);
     output_int((uint64_t)time(NULL));
     fputc('}', stream);
   }
@@ -161,7 +170,7 @@ static int item(struct dir *item, const char *name, struct dir_ext *ext) {
   if(item->flags & FF_DIR)
     fputc('[', stream);
 
-  output_info(item, name, ext);
+  output_info(item, name, ext, nlink);
 
   if(item->flags & FF_DIR)
     nstack_push(&stack, item->dev);

src/dir_import.c

@@ -1,6 +1,6 @@
 /* ncdu - NCurses Disk Usage
 
-  Copyright (c) 2007-2020 Yoran Heling
+  Copyright (c) Yorhel
 
   Permission is hereby granted, free of charge, to any person obtaining
   a copy of this software and associated documentation files (the
@@ -72,6 +72,7 @@ static struct ctx {
   /* scratch space */
   struct dir    *buf_dir;
   struct dir_ext buf_ext[1];
+  unsigned int nlink;
 
   char buf_name[MAX_VAL];
   char val[MAX_VAL];
@@ -186,7 +187,7 @@ static int cons(void) {
 
 
 static int rstring_esc(char **dest, int *destlen) {
-  unsigned int n;
+  unsigned int n, s;
 
   C(rfill1);
 
@@ -203,8 +204,22 @@ static int rstring_esc(char **dest, int *destlen) {
   case 'u':
     C(rfill(5));
 #define hn(n) (n >= '0' && n <= '9' ? n-'0' : n >= 'A' && n <= 'F' ? n-'A'+10 : n >= 'a' && n <= 'f' ? n-'a'+10 : 1<<16)
-    n = (hn(ctx->buf[1])<<12) + (hn(ctx->buf[2])<<8) + (hn(ctx->buf[3])<<4) + hn(ctx->buf[4]);
-#undef hn
+#define h4(b) (hn((b)[0])<<12) + (hn((b)[1])<<8) + (hn((b)[2])<<4) + hn((b)[3])
+    n = h4(ctx->buf+1);
+    con(5);
+    E(n >= (1<<16), "Invalid \\u escape");
+    E((n & 0xfc00) == 0xdc00, "Unexpected low surrogate");
+    if((n & 0xfc00) == 0xd800) { /* high surrogate */
+      C(rfill(7));
+      E(ctx->buf[0] != '\\', "Expected low surrogate");
+      E(ctx->buf[1] != 'u', "Expected low surrogate");
+      s = h4(ctx->buf+2);
+      con(6);
+      E(s >= (1<<16), "Invalid \\u escape");
+      E((s & 0xfc00) != 0xdc00, "Expected low surrogate");
+      n = 0x10000 + (((n & 0x03ff) << 10) | (s & 0x03ff));
+    }
+
     if(n <= 0x007F) {
       ap(n);
     } else if(n <= 0x07FF) {
@@ -214,9 +229,14 @@ static int rstring_esc(char **dest, int *destlen) {
       ap(0xE0 | (n>>12));
       ap(0x80 | ((n>>6) & 0x3F));
       ap(0x80 | (n & 0x3F));
-    } else /* this happens if there was an invalid character (n >= (1<<16)) */
-      E(1, "Invalid character in \\u escape");
-    con(5);
+    } else {
+      ap(0xF0 | (n>>18));\
+      ap(0x80 | ((n>>12) & 0x3F));
+      ap(0x80 | ((n>>6) & 0x3F));
+      ap(0x80 | (n & 0x3F));
+    }
+#undef hn
+#undef h4
     break;
   default:
     E(1, "Invalid escape sequence");
@@ -421,7 +441,7 @@ static int itemdir(uint64_t dev) {
 
 
 /* Reads a JSON object representing a struct dir/dir_ext item. Writes to
- * ctx->buf_dir, ctx->buf_ext and ctx->buf_name. */
+ * ctx->buf_dir, ctx->buf_ext, ctx->buf_name and ctx->nlink. */
 static int iteminfo(void) {
   uint64_t iv;
 
@@ -449,27 +469,42 @@ static int iteminfo(void) {
       C(rint64(&iv, UINT64_MAX));
       ctx->buf_dir->ino = iv;
     } else if(strcmp(ctx->val, "uid") == 0) {        /* uid */
-      C(rint64(&iv, INT32_MAX));
+      C(rint64(&iv, UINT32_MAX));
       ctx->buf_dir->flags |= FF_EXT;
+      ctx->buf_ext->flags |= FFE_UID;
       ctx->buf_ext->uid = iv;
     } else if(strcmp(ctx->val, "gid") == 0) {        /* gid */
-      C(rint64(&iv, INT32_MAX));
+      C(rint64(&iv, UINT32_MAX));
       ctx->buf_dir->flags |= FF_EXT;
+      ctx->buf_ext->flags |= FFE_GID;
       ctx->buf_ext->gid = iv;
     } else if(strcmp(ctx->val, "mode") == 0) {       /* mode */
       C(rint64(&iv, UINT16_MAX));
       ctx->buf_dir->flags |= FF_EXT;
+      ctx->buf_ext->flags |= FFE_MODE;
       ctx->buf_ext->mode = iv;
     } else if(strcmp(ctx->val, "mtime") == 0) {      /* mtime */
       C(rint64(&iv, UINT64_MAX));
       ctx->buf_dir->flags |= FF_EXT;
+      ctx->buf_ext->flags |= FFE_MTIME;
       ctx->buf_ext->mtime = iv;
+      /* Accept decimal numbers, but discard the fractional part because our data model doesn't support it. */
+      if(*ctx->buf == '.') {
+          con(1);
+          while(*ctx->buf >= '0' && *ctx->buf <= '9')
+              con(1);
+      }
     } else if(strcmp(ctx->val, "hlnkc") == 0) {      /* hlnkc */
       if(*ctx->buf == 't') {
         C(rlit("true", 4));
         ctx->buf_dir->flags |= FF_HLNKC;
       } else
         C(rlit("false", 5));
+    } else if(strcmp(ctx->val, "nlink") == 0) {      /* nlink */
+      C(rint64(&iv, UINT32_MAX));
+      if(iv > 1)
+        ctx->buf_dir->flags |= FF_HLNKC;
+      ctx->nlink = iv;
     } else if(strcmp(ctx->val, "read_error") == 0) { /* read_error */
       if(*ctx->buf == 't') {
         C(rlit("true", 4));
@@ -478,7 +513,7 @@ static int iteminfo(void) {
         C(rlit("false", 5));
     } else if(strcmp(ctx->val, "excluded") == 0) {   /* excluded */
       C(rstring(ctx->val, 8));
-      if(strcmp(ctx->val, "otherfs") == 0)
+      if(strcmp(ctx->val, "otherfs") == 0 || strcmp(ctx->val, "othfs") == 0)
         ctx->buf_dir->flags |= FF_OTHFS;
       else if(strcmp(ctx->val, "kernfs") == 0)
         ctx->buf_dir->flags |= FF_KERNFS;
@@ -526,6 +561,7 @@ static int item(uint64_t dev) {
 
   memset(ctx->buf_dir, 0, offsetof(struct dir, name));
   memset(ctx->buf_ext, 0, sizeof(struct dir_ext));
+  ctx->nlink = 0;
   *ctx->buf_name = 0;
   ctx->buf_dir->flags |= isdir ? FF_DIR : FF_FILE;
   ctx->buf_dir->dev = dev;
@@ -539,16 +575,16 @@ static int item(uint64_t dev) {
     dir_curpath_enter(ctx->buf_name);
 
   if(isdir) {
-    if(dir_output.item(ctx->buf_dir, ctx->buf_name, ctx->buf_ext)) {
+    if(dir_output.item(ctx->buf_dir, ctx->buf_name, ctx->buf_ext, ctx->nlink)) {
       dir_seterr("Output error: %s", strerror(errno));
       return 1;
     }
     C(itemdir(dev));
-    if(dir_output.item(NULL, 0, NULL)) {
+    if(dir_output.item(NULL, 0, NULL, 0)) {
       dir_seterr("Output error: %s", strerror(errno));
       return 1;
     }
-  } else if(dir_output.item(ctx->buf_dir, ctx->buf_name, ctx->buf_ext)) {
+  } else if(dir_output.item(ctx->buf_dir, ctx->buf_name, ctx->buf_ext, ctx->nlink)) {
     dir_seterr("Output error: %s", strerror(errno));
     return 1;
   }
@@ -561,8 +597,14 @@ static int item(uint64_t dev) {
 
 
 static int footer(void) {
-  C(cons());
-  E(*ctx->buf != ']', "Expected ']'");
+  while(1) {
+    C(cons());
+    if(*ctx->buf == ']')
+      break;
+    E(*ctx->buf != ',', "Expected ',' or ']'");
+    con(1);
+    C(cons() || rval());
+  }
   con(1);
   C(cons());
   E(*ctx->buf, "Trailing garbage");

src/dir_mem.c

@@ -1,6 +1,6 @@
 /* ncdu - NCurses Disk Usage
 
-  Copyright (c) 2007-2020 Yoran Heling
+  Copyright (c) Yorhel
 
   Permission is hereby granted, free of charge, to any person obtaining
   a copy of this software and associated documentation files (the
@@ -45,13 +45,13 @@ static hl_t *links = NULL;
 /* recursively checks a dir structure for hard links and fills the lookup array */
 static void hlink_init(struct dir *d) {
   struct dir *t;
+  int r;
 
   for(t=d->sub; t!=NULL; t=t->next)
     hlink_init(t);
 
   if(!(d->flags & FF_HLNKC))
     return;
-  int r;
   hl_put(links, d, &r);
 }
 
@@ -109,8 +109,9 @@ static void item_add(struct dir *item) {
 }
 
 
-static int item(struct dir *dir, const char *name, struct dir_ext *ext) {
+static int item(struct dir *dir, const char *name, struct dir_ext *ext, unsigned int nlink) {
   struct dir *t, *item;
+  (void)nlink;
 
   /* Go back to parent dir */
   if(!dir) {
@@ -126,7 +127,7 @@ static int item(struct dir *dir, const char *name, struct dir_ext *ext) {
   item = xmalloc(dir->flags & FF_EXT ? dir_ext_memsize(name) : dir_memsize(name));
   memcpy(item, dir, offsetof(struct dir, name));
   strcpy(item->name, name);
-  if(dir->flags & FF_EXT)
+  if(item->flags & FF_EXT)
     memcpy(dir_ext_ptr(item), ext, sizeof(struct dir_ext));
 
   item_add(item);

src/dir_scan.c

@@ -1,6 +1,6 @@
 /* ncdu - NCurses Disk Usage
 
-  Copyright (c) 2007-2020 Yoran Heling
+  Copyright (c) Yorhel
 
   Permission is hereby granted, free of charge, to any person obtaining
   a copy of this software and associated documentation files (the
@@ -51,16 +51,17 @@
 
 
 int dir_scan_smfs; /* Stay on the same filesystem */
+int exclude_kernfs; /* Exclude Linux pseudo filesystems */
 
 static uint64_t curdev;   /* current device we're scanning on */
 
 /* scratch space */
 static struct dir    *buf_dir;
 static struct dir_ext buf_ext[1];
+static unsigned int buf_nlink;
 
 
 #if HAVE_LINUX_MAGIC_H && HAVE_SYS_STATFS_H && HAVE_STATFS
-int exclude_kernfs; /* Exclude Linux pseudo filesystems */
 
 static int is_kernfs(unsigned long type) {
   if(
@@ -120,8 +121,11 @@ static void stat_to_dir(struct stat *fs) {
   else if(S_ISDIR(fs->st_mode))
     buf_dir->flags |= FF_DIR;
 
-  if(!S_ISDIR(fs->st_mode) && fs->st_nlink > 1)
+  if(!S_ISDIR(fs->st_mode) && fs->st_nlink > 1) {
     buf_dir->flags |= FF_HLNKC;
+    buf_nlink = fs->st_nlink;
+  } else
+    buf_nlink = 0;
 
   if(dir_scan_smfs && curdev != buf_dir->dev)
     buf_dir->flags |= FF_OTHFS;
@@ -133,8 +137,9 @@ static void stat_to_dir(struct stat *fs) {
 
   buf_ext->mode  = fs->st_mode;
   buf_ext->mtime = fs->st_mtime;
-  buf_ext->uid   = (int)fs->st_uid;
-  buf_ext->gid   = (int)fs->st_gid;
+  buf_ext->uid   = (unsigned int)fs->st_uid;
+  buf_ext->gid   = (unsigned int)fs->st_gid;
+  buf_ext->flags = FFE_MTIME | FFE_UID | FFE_GID | FFE_MODE;
 }
 
 
@@ -158,21 +163,26 @@ static char *dir_read(int *err) {
   }
 
   buf = xmalloc(buflen);
-  errno = 0;
 
-  while((item = readdir(dir)) != NULL) {
+  while(1) {
+    size_t len, req;
+    errno = 0;
+    if ((item = readdir(dir)) == NULL) {
+      if(errno)
+        *err = 1;
+      break;
+    }
     if(item->d_name[0] == '.' && (item->d_name[1] == 0 || (item->d_name[1] == '.' && item->d_name[2] == 0)))
       continue;
-    size_t req = off+3+strlen(item->d_name);
+    len = strlen(item->d_name);
+    req = off+3+len;
     if(req > buflen) {
       buflen = req < buflen*2 ? buflen*2 : req;
       buf = xrealloc(buf, buflen);
     }
     strcpy(buf+off, item->d_name);
-    off += strlen(item->d_name)+1;
+    off += len+1;
   }
-  if(errno)
-    *err = 1;
   if(closedir(dir) < 0)
     *err = 1;
 
@@ -193,7 +203,7 @@ static int dir_scan_recurse(const char *name) {
   if(chdir(name)) {
     dir_setlasterr(dir_curpath);
     buf_dir->flags |= FF_ERR;
-    if(dir_output.item(buf_dir, name, buf_ext) || dir_output.item(NULL, 0, NULL)) {
+    if(dir_output.item(buf_dir, name, buf_ext, buf_nlink) || dir_output.item(NULL, 0, NULL, 0)) {
       dir_seterr("Output error: %s", strerror(errno));
       return 1;
     }
@@ -203,7 +213,7 @@ static int dir_scan_recurse(const char *name) {
   if((dir = dir_read(&fail)) == NULL) {
     dir_setlasterr(dir_curpath);
     buf_dir->flags |= FF_ERR;
-    if(dir_output.item(buf_dir, name, buf_ext) || dir_output.item(NULL, 0, NULL)) {
+    if(dir_output.item(buf_dir, name, buf_ext, buf_nlink) || dir_output.item(NULL, 0, NULL, 0)) {
       dir_seterr("Output error: %s", strerror(errno));
       return 1;
     }
@@ -218,12 +228,12 @@ static int dir_scan_recurse(const char *name) {
   if(fail)
     buf_dir->flags |= FF_ERR;
 
-  if(dir_output.item(buf_dir, name, buf_ext)) {
+  if(dir_output.item(buf_dir, name, buf_ext, buf_nlink)) {
     dir_seterr("Output error: %s", strerror(errno));
     return 1;
   }
   fail = dir_walk(dir);
-  if(dir_output.item(NULL, 0, NULL)) {
+  if(dir_output.item(NULL, 0, NULL, 0)) {
     dir_seterr("Output error: %s", strerror(errno));
     return 1;
   }
@@ -308,11 +318,11 @@ static int dir_scan_item(const char *name) {
   if(buf_dir->flags & FF_DIR && !(buf_dir->flags & (FF_ERR|FF_EXL|FF_OTHFS|FF_KERNFS|FF_FRMLNK)))
     fail = dir_scan_recurse(name);
   else if(buf_dir->flags & FF_DIR) {
-    if(dir_output.item(buf_dir, name, buf_ext) || dir_output.item(NULL, 0, NULL)) {
+    if(dir_output.item(buf_dir, name, buf_ext, 0) || dir_output.item(NULL, 0, NULL, 0)) {
       dir_seterr("Output error: %s", strerror(errno));
       fail = 1;
     }
-  } else if(dir_output.item(buf_dir, name, buf_ext)) {
+  } else if(dir_output.item(buf_dir, name, buf_ext, buf_nlink)) {
     dir_seterr("Output error: %s", strerror(errno));
     fail = 1;
   }
@@ -333,6 +343,7 @@ static int dir_walk(char *dir) {
     dir_curpath_enter(cur);
     memset(buf_dir, 0, offsetof(struct dir, name));
     memset(buf_ext, 0, sizeof(struct dir_ext));
+    buf_nlink = 0;
     fail = dir_scan_item(cur);
     dir_curpath_leave();
   }
@@ -350,6 +361,7 @@ static int process(void) {
 
   memset(buf_dir, 0, offsetof(struct dir, name));
   memset(buf_ext, 0, sizeof(struct dir_ext));
+  buf_nlink = 0;
 
   if((path = path_real(dir_curpath)) == NULL)
     dir_seterr("Error obtaining full path: %s", strerror(errno));
@@ -376,13 +388,13 @@ static int process(void) {
       buf_dir->flags |= FF_ERR;
     stat_to_dir(&fs);
 
-    if(dir_output.item(buf_dir, dir_curpath, buf_ext)) {
+    if(dir_output.item(buf_dir, dir_curpath, buf_ext, buf_nlink)) {
       dir_seterr("Output error: %s", strerror(errno));
       fail = 1;
     }
     if(!fail)
       fail = dir_walk(dir);
-    if(!fail && dir_output.item(NULL, 0, NULL)) {
+    if(!fail && dir_output.item(NULL, 0, NULL, 0)) {
       dir_seterr("Output error: %s", strerror(errno));
       fail = 1;
     }

src/dirlist.c

@@ -1,6 +1,6 @@
 /* ncdu - NCurses Disk Usage
 
-  Copyright (c) 2007-2020 Yoran Heling
+  Copyright (c) Yorhel
 
   Permission is hereby granted, free of charge, to any person obtaining
   a copy of this software and associated documentation files (the
@@ -24,6 +24,7 @@
 */
 
 #include "global.h"
+#include "strnatcmp.h"
 
 #include <string.h>
 #include <stdlib.h>
@@ -38,7 +39,8 @@ int64_t dirlist_maxs       = 0,
 int    dirlist_sort_desc   = 1,
        dirlist_sort_col    = DL_COL_SIZE,
        dirlist_sort_df     = 0,
-       dirlist_hidden      = 0;
+       dirlist_hidden      = 0,
+       dirlist_natsort     = 1;
 
 /* private state vars */
 static struct dir *parent_alloc, *head, *head_real, *selected, *top = NULL;
@@ -79,7 +81,7 @@ static int dirlist_cmp(struct dir *x, struct dir *y) {
    *
    * Note that the method used below is supposed to be fast, not readable :-)
    */
-#define CMP_NAME  strcmp(x->name, y->name)
+#define CMP_NAME  (dirlist_natsort ? strnatcmp(x->name, y->name) : strcmp(x->name, y->name))
 #define CMP_SIZE  (x->size  > y->size  ? 1 : (x->size  == y->size  ? 0 : -1))
 #define CMP_ASIZE (x->asize > y->asize ? 1 : (x->asize == y->asize ? 0 : -1))
 #define CMP_ITEMS (x->items > y->items ? 1 : (x->items == y->items ? 0 : -1))
@@ -395,4 +397,3 @@ void dirlist_set_hidden(int hidden) {
   dirlist_fixup();
   dirlist_top(-5);
 }
-

src/dirlist.h

@@ -1,6 +1,6 @@
 /* ncdu - NCurses Disk Usage
 
-  Copyright (c) 2007-2020 Yoran Heling
+  Copyright (c) Yorhel
 
   Permission is hereby granted, free of charge, to any person obtaining
   a copy of this software and associated documentation files (the
@@ -78,6 +78,8 @@ extern int dirlist_sort_desc, dirlist_sort_col, dirlist_sort_df;
 /* set with dirlist_set_hidden() */
 extern int dirlist_hidden;
 
+extern int dirlist_natsort;
+
 /* maximum size of an item in the opened dir */
 extern int64_t dirlist_maxs, dirlist_maxa;
 

src/exclude.c

@@ -1,6 +1,6 @@
 /* ncdu - NCurses Disk Usage
 
-  Copyright (c) 2007-2020 Yoran Heling
+  Copyright (c) Yorhel
 
   Permission is hereby granted, free of charge, to any person obtaining
   a copy of this software and associated documentation files (the
@@ -46,8 +46,7 @@ void exclude_add(char *pat) {
     n = &((*n)->next);
 
   *n = (struct exclude *) xcalloc(1, sizeof(struct exclude));
-  (*n)->pattern = (char *) xmalloc(strlen(pat)+1);
-  strcpy((*n)->pattern, pat);
+  (*n)->pattern = xstrdup(pat);
 }
 
 
@@ -89,7 +88,7 @@ int exclude_match(char *path) {
 }
 
 
-void exclude_clear() {
+void exclude_clear(void) {
   struct exclude *n, *l;
 
   for(n=excludes; n!=NULL; n=l) {

src/exclude.h

@@ -1,6 +1,6 @@
 /* ncdu - NCurses Disk Usage
 
-  Copyright (c) 2007-2020 Yoran Heling
+  Copyright (c) Yorhel
 
   Permission is hereby granted, free of charge, to any person obtaining
   a copy of this software and associated documentation files (the

src/global.h

@@ -1,6 +1,6 @@
 /* ncdu - NCurses Disk Usage
 
-  Copyright (c) 2007-2020 Yoran Heling
+  Copyright (c) Yorhel
 
   Permission is hereby granted, free of charge, to any person obtaining
   a copy of this software and associated documentation files (the
@@ -54,6 +54,12 @@
 #define FF_KERNFS 0x200 /* excluded because it was a Linux pseudo filesystem */
 #define FF_FRMLNK 0x400 /* excluded because it was a firmlink */
 
+/* Ext mode flags (struct dir_ext -> flags) */
+#define FFE_MTIME 0x01
+#define FFE_UID   0x02
+#define FFE_GID   0x04
+#define FFE_MODE  0x08
+
 /* Program states */
 #define ST_CALC   0
 #define ST_BROWSE 1
@@ -70,7 +76,7 @@ struct dir {
   struct dir *parent, *next, *prev, *sub, *hlnk;
   int items;
   unsigned short flags;
-  char name[];
+  char name[FLEXIBLE_ARRAY_MEMBER];
 };
 
 /* A note on the ino and dev fields above: ino is usually represented as ino_t,
@@ -88,15 +94,18 @@ struct dir {
  * macros to help manage this. */
 struct dir_ext {
   uint64_t mtime;
-  int uid, gid;
+  unsigned int uid, gid;
   unsigned short mode;
+  unsigned char flags;
 };
 
 
 /* program state */
 extern int pstate;
-/* read-only flag, 1+ = disable deletion, 2+ = also disable shell */
-extern int read_only;
+/* enabled features */
+extern int can_delete;
+extern int can_shell;
+extern int can_refresh;
 /* minimum screen update interval when calculating, in ms */
 extern long update_delay;
 /* filter directories with CACHEDIR.TAG */
@@ -109,6 +118,17 @@ extern int extended_info;
 extern int follow_symlinks;
 /* flag whether we want to follow firmlinks */
 extern int follow_firmlinks;
+/* display SI units */
+extern int si;
+/* show apparent sizes */
+extern int show_as;
+/* graph display setting */
+extern int graph;
+extern int graph_style;
+/* column visibility */
+extern int show_items;
+extern int show_mtime;
+
 
 /* handle input from keyboard and update display */
 int input_handle(int);

src/help.c

@@ -1,6 +1,6 @@
 /* ncdu - NCurses Disk Usage
 
-  Copyright (c) 2007-2020 Yoran Heling
+  Copyright (c) Yorhel
 
   Permission is hereby granted, free of charge, to any person obtaining
   a copy of this software and associated documentation files (the
@@ -70,7 +70,7 @@ static const char *flags[FLAGS*2] = {
     "F", "Excluded firmlink",
 };
 
-void help_draw() {
+void help_draw(void) {
   int i, line;
 
   browse_draw();
@@ -156,7 +156,7 @@ void help_draw() {
       ncaddstr(y+1, x+30, "Disk");
       ncaddstr(y+2, x+30, "Usage");
       ncprint( y+4, x+30, "%s", PACKAGE_VERSION);
-      ncaddstr( 9,  7, "Written by Yoran Heling <projects@yorhel.nl>");
+      ncaddstr( 9, 11, "Written by Yorhel <projects@yorhel.nl>");
       ncaddstr(10, 16, "https://dev.yorhel.nl/ncdu/");
       break;
   }
@@ -203,7 +203,7 @@ int help_key(int ch) {
 }
 
 
-void help_init() {
+void help_init(void) {
   page = 1;
   start = 0;
   pstate = ST_HELP;

src/help.h

@@ -1,6 +1,6 @@
 /* ncdu - NCurses Disk Usage
 
-  Copyright (c) 2007-2020 Yoran Heling
+  Copyright (c) Yorhel
 
   Permission is hereby granted, free of charge, to any person obtaining
   a copy of this software and associated documentation files (the

src/main.c

@@ -1,6 +1,6 @@
 /* ncdu - NCurses Disk Usage
 
-  Copyright (c) 2007-2020 Yoran Heling
+  Copyright (c) Yorhel
 
   Permission is hereby granted, free of charge, to any person obtaining
   a copy of this software and associated documentation files (the
@@ -33,17 +33,23 @@
 #include <unistd.h>
 #include <sys/time.h>
 
-#include <yopt.h>
-
 
 int pstate;
-int read_only = 0;
+int can_delete = -1;
+int can_shell = -1;
+int can_refresh = -1;
 long update_delay = 100;
 int cachedir_tags = 0;
 int extended_info = 0;
 int follow_symlinks = 0;
 int follow_firmlinks = 1;
 int confirm_quit = 0;
+int si = 0;
+int show_as = 0;
+int graph = 1;
+int graph_style = 0;
+int show_items = 0;
+int show_mtime = 0;
 
 static int min_rows = 17, min_cols = 60;
 static int ncurses_init = 0;
@@ -113,150 +119,341 @@ int input_handle(int wait) {
 }
 
 
-/* parse command line */
+/* This is a backport of the argument parser in the Zig version.
+ * Minor differences in that this implementation can modify argv in-place and has a slightly different API. */
+struct argparser {
+  int argc;
+  char **argv;
+  char *shortopt;
+  char *last;
+  char *last_arg;
+  char shortbuf[2];
+  char argsep;
+  char ignerror;
+} argparser_state;
+
+static char *argparser_pop(struct argparser *p) {
+  char *a;
+  if(p->argc == 0) return NULL;
+  a = *p->argv;
+  p->argv++;
+  p->argc--;
+  return a;
+}
+
+static int argparser_shortopt(struct argparser *p, char *buf) {
+  p->shortbuf[0] = '-';
+  p->shortbuf[1] = *buf;
+  p->shortopt = buf[1] ? buf+1 : NULL;
+  p->last = p->shortbuf;
+  return 1;
+}
+
+/* Returns -1 on error (only when ignerror), 0 when done, 1 if there's an option, 2 if there's a positional argument. */
+static int argparser_next(struct argparser *p) {
+  if(p->last_arg) { if(p->ignerror) return -1; die("Option '%s' does not expect an argument.\n", p->last); }
+  if(p->shortopt) return argparser_shortopt(p, p->shortopt);
+  p->last = argparser_pop(p);
+  if(!p->last) return 0;
+  if(p->argsep || !*p->last || *p->last != '-') return 2;
+  if(!p->last[1]) { if(p->ignerror) return -1; die("Invalid option '-'.\n"); }
+  if(p->last[1] == '-' && !p->last[2]) { /* '--' argument separator */
+    p->argsep = 1;
+    return argparser_next(p);
+  }
+  if(p->last[1] == '-') { /* long option */
+    p->last_arg = strchr(p->last, '=');
+    if(p->last_arg) {
+      *p->last_arg = 0;
+      p->last_arg++;
+    }
+    return 1;
+  }
+  /* otherwise: short option */
+  return argparser_shortopt(p, p->last+1);
+}
+
+static char *argparser_arg(struct argparser *p) {
+  char *tmp;
+  if(p->shortopt) {
+    tmp = p->shortopt;
+    p->shortopt = NULL;
+    return tmp;
+  }
+  if(p->last_arg) {
+    tmp = p->last_arg;
+    p->last_arg = NULL;
+    return tmp;
+  }
+  tmp = argparser_pop(p);
+  if(!tmp) { if(p->ignerror) return NULL; die("Option '%s' requires an argument.\n", p->last); }
+  return tmp;
+}
+
+#define OPT(_s) (strcmp(argparser_state.last, (_s)) == 0)
+#define ARG (argparser_arg(&argparser_state))
+
+static int arg_option(int infile) {
+  char *arg, *tmp;
+  if(OPT("-q") || OPT("--slow-ui-updates")) update_delay = 2000;
+  else if(OPT("--fast-ui-updates")) update_delay = 100;
+  else if(OPT("-x") || OPT("--one-file-system")) dir_scan_smfs = 1;
+  else if(OPT("--cross-file-system")) dir_scan_smfs = 0;
+  else if(OPT("-e") || OPT("--extended")) extended_info = 1;
+  else if(OPT("--no-extended")) extended_info = 0;
+  else if(OPT("-r") && !can_delete) can_shell = 0;
+  else if(OPT("-r")) can_delete = 0;
+  else if(OPT("--enable-shell")) can_shell = 1;
+  else if(OPT("--disable-shell")) can_shell = 0;
+  else if(OPT("--enable-delete")) can_delete = 1;
+  else if(OPT("--disable-delete")) can_delete = 0;
+  else if(OPT("--enable-refresh")) can_refresh = 1;
+  else if(OPT("--disable-refresh")) can_refresh = 0;
+  else if(OPT("--show-hidden")) dirlist_hidden = 0;
+  else if(OPT("--hide-hidden")) dirlist_hidden = 1;
+  else if(OPT("--show-itemcount")) show_items = 1;
+  else if(OPT("--hide-itemcount")) show_items = 0;
+  else if(OPT("--show-mtime")) show_mtime = 1;
+  else if(OPT("--hide-mtime")) show_mtime = 0;
+  else if(OPT("--show-graph")) graph |= 1;
+  else if(OPT("--hide-graph")) graph &= 2;
+  else if(OPT("--show-percent")) graph |= 2;
+  else if(OPT("--hide-percent")) graph &= 1;
+  else if(OPT("--group-directories-first")) dirlist_sort_df = 1;
+  else if(OPT("--no-group-directories-first")) dirlist_sort_df = 0;
+  else if(OPT("--enable-natsort")) dirlist_natsort = 1;
+  else if(OPT("--disable-natsort")) dirlist_natsort = 0;
+  else if(OPT("--graph-style")) {
+    arg = ARG;
+    if (!arg) return 1;
+    else if (strcmp(arg, "hash") == 0) graph_style = 0;
+    else if (strcmp(arg, "half-block") == 0) graph_style = 1;
+    else if (strcmp(arg, "eighth-block") == 0 || strcmp(arg, "eigth-block") == 0) graph_style = 2;
+    else if (!argparser_state.ignerror) die("Unknown --graph-style option: %s.\n", arg);
+  } else if(OPT("--sort")) {
+    arg = ARG;
+    if (!arg) return 1;
+    tmp = strrchr(arg, '-');
+    if(tmp && (strcmp(tmp, "-asc") == 0 || strcmp(tmp, "-desc") == 0)) *tmp = 0;
+
+    if(strcmp(arg, "name") == 0) {
+      dirlist_sort_col = DL_COL_NAME;
+      dirlist_sort_desc = 0;
+    } else if(strcmp(arg, "disk-usage") == 0) {
+      dirlist_sort_col = DL_COL_SIZE;
+      dirlist_sort_desc = 1;
+    } else if(strcmp(arg, "apparent-size") == 0) {
+      dirlist_sort_col = DL_COL_ASIZE;
+      dirlist_sort_desc = 1;
+    } else if(strcmp(arg, "itemcount") == 0) {
+      dirlist_sort_col = DL_COL_ITEMS;
+      dirlist_sort_desc = 1;
+    } else if(strcmp(arg, "mtime") == 0) {
+      dirlist_sort_col = DL_COL_MTIME;
+      dirlist_sort_desc = 0;
+    } else if(argparser_state.ignerror) return 1;
+    else die("Invalid argument to --sort: '%s'.\n", arg);
+
+    if(tmp && !*tmp) dirlist_sort_desc = tmp[1] == 'd';
+  } else if(OPT("--apparent-size")) show_as = 1;
+  else if(OPT("--disk-usage")) show_as = 0;
+  else if(OPT("-0")) dir_ui = 0;
+  else if(OPT("-1")) dir_ui = 1;
+  else if(OPT("-2")) dir_ui = 2;
+  else if(OPT("--si")) si = 1;
+  else if(OPT("--no-si")) si = 0;
+  else if(OPT("-L") || OPT("--follow-symlinks")) follow_symlinks = 1;
+  else if(OPT("--no-follow-symlinks")) follow_symlinks = 0;
+  else if(OPT("--exclude")) {
+    arg = ARG;
+    if(!arg) return 1;
+    if(infile) arg = expanduser(arg);
+    exclude_add(arg);
+    if(infile) free(arg);
+  } else if(OPT("-X") || OPT("--exclude-from")) {
+    arg = ARG;
+    if(!arg) return 1;
+    if(infile) arg = expanduser(arg);
+    if(exclude_addfile(arg)) { if (argparser_state.ignerror) return 1; die("Can't open %s: %s\n", arg, strerror(errno)); }
+    if(infile) free(arg);
+  } else if(OPT("--exclude-caches")) cachedir_tags = 1;
+  else if(OPT("--include-caches")) cachedir_tags = 0;
+  else if(OPT("--exclude-kernfs")) exclude_kernfs = 1;
+  else if(OPT("--include-kernfs")) exclude_kernfs = 0;
+  else if(OPT("--follow-firmlinks")) follow_firmlinks = 1;
+  else if(OPT("--exclude-firmlinks")) follow_firmlinks = 0;
+  else if(OPT("--confirm-quit")) confirm_quit = 1;
+  else if(OPT("--no-confirm-quit")) confirm_quit = 0;
+  else if(OPT("--confirm-delete")) delete_confirm = 1;
+  else if(OPT("--no-confirm-delete")) delete_confirm = 0;
+  else if(OPT("--color")) {
+    arg = ARG;
+    if (!arg) return 1;
+    else if(strcmp(arg, "off") == 0) uic_theme = 0;
+    else if(strcmp(arg, "dark") == 0) uic_theme = 1;
+    else if(strcmp(arg, "dark-bg") == 0) uic_theme = 2;
+    else if (!argparser_state.ignerror) die("Unknown --color option: %s\n", arg);
+  } else return 0;
+  return 1;
+}
+
+static void arg_help(void) {
+  printf(
+  "ncdu <options> <directory>\n"
+  "\n"
+  "Mode selection:\n"
+  "  -h, --help                 This help message\n"
+  "  -v, -V, --version          Print version\n"
+  "  -f FILE                    Import scanned directory from FILE\n"
+  "  -o FILE                    Export scanned directory to FILE in JSON format\n"
+  "  -e, --extended             Enable extended information\n"
+  "  --ignore-config            Don't load config files\n"
+  "\n"
+  "Scan options:\n"
+  "  -x, --one-file-system      Stay on the same filesystem\n"
+  "  --exclude PATTERN          Exclude files that match PATTERN\n"
+  "  -X, --exclude-from FILE    Exclude files that match any pattern in FILE\n"
+  "  --exclude-caches           Exclude directories containing CACHEDIR.TAG\n"
+  "  -L, --follow-symlinks      Follow symbolic links (excluding directories)\n"
+#if HAVE_LINUX_MAGIC_H && HAVE_SYS_STATFS_H && HAVE_STATFS
+  "  --exclude-kernfs           Exclude Linux pseudo filesystems (procfs,sysfs,cgroup,...)\n"
+#endif
+#if HAVE_SYS_ATTR_H && HAVE_GETATTRLIST && HAVE_DECL_ATTR_CMNEXT_NOFIRMLINKPATH
+  "  --exclude-firmlinks        Exclude firmlinks on macOS\n"
+#endif
+  "\n"
+  "Interface options:\n"
+  "  -0, -1, -2                 UI to use when scanning (0=none,2=full ncurses)\n"
+  "  -q, --slow-ui-updates      \"Quiet\" mode, refresh interval 2 seconds\n"
+  "  --enable-shell             Enable/disable shell spawning feature\n"
+  "  --enable-delete            Enable/disable file deletion feature\n"
+  "  --enable-refresh           Enable/disable directory refresh feature\n"
+  "  -r                         Read only (--disable-delete)\n"
+  "  -rr                        Read only++ (--disable-delete & --disable-shell)\n"
+  "  --si                       Use base 10 (SI) prefixes instead of base 2\n"
+  "  --apparent-size            Show apparent size instead of disk usage by default\n"
+  "  --hide-hidden              Hide \"hidden\" or excluded files by default\n"
+  "  --show-itemcount           Show item count column by default\n"
+  "  --show-mtime               Show mtime column by default (requires `-e`)\n"
+  "  --show-graph               Show graph column by default\n"
+  "  --show-percent             Show percent column by default\n"
+  "  --graph-style STYLE        hash / half-block / eighth-block\n"
+  "  --sort COLUMN-(asc/desc)   disk-usage / name / apparent-size / itemcount / mtime\n"
+  "  --enable-natsort           Use natural order when sorting by name\n"
+  "  --group-directories-first  Sort directories before files\n"
+  "  --confirm-quit             Ask confirmation before quitting ncdu\n"
+  "  --no-confirm-delete        Don't ask confirmation before deletion\n"
+  "  --color SCHEME             off / dark / dark-bg\n"
+  "\n"
+  "Refer to `man ncdu` for more information.\n");
+  exit(0);
+}
+
+
+static void config_read(const char *fn) {
+  FILE *f;
+  char buf[1024], *line, *tmp, *args[3];
+  int r, len;
+
+  if((f = fopen(fn, "r")) == NULL) {
+    if(errno == ENOENT || errno == ENOTDIR) return;
+    die("Error opening %s: %s.\nRun with --ignore-config to skip reading config files.\n", fn, strerror(errno));
+  }
+
+  while(fgets(buf, 1024, f) != NULL) {
+    line = buf;
+    while(*line == ' ' || *line == '\t') line++;
+    len = strlen(line);
+    while(len > 0 && (line[len-1] == ' ' || line[len-1] == '\t' || line[len-1] == '\r' || line[len-1] == '\n')) len -= 1;
+    line[len] = 0;
+    if(len == 0 || *line == '#') continue;
+
+    memset(&argparser_state, 0, sizeof(struct argparser));
+    argparser_state.argv = args;
+
+    if (*line == '@') {
+        argparser_state.ignerror = 1;
+        line++;
+        if (!*line || *line == '#') continue;
+    }
+    args[argparser_state.argc++] = line;
+
+    for(tmp=line; *tmp && *tmp != ' ' && *tmp != '\t'; tmp++);
+    while(*tmp && (*tmp == ' ' || *tmp == '\t')) {
+      *tmp = 0;
+      tmp++;
+    }
+    if(*tmp) args[argparser_state.argc++] = tmp;
+    args[argparser_state.argc] = NULL;
+
+    while((r = argparser_next(&argparser_state)) > 0) {
+      if(r == 2 || !arg_option(1)) {
+        if (argparser_state.ignerror) break;
+        die("Unknown option in config file '%s': %s.\nRun with --ignore-config to skip reading config files.\n", fn, argparser_state.last);
+      }
+    }
+  }
+  if(ferror(f))
+    die("Error reading from %s: %s\nRun with --ignore-config to skip reading config files.\n", fn, strerror(errno));
+  fclose(f);
+}
+
+
+static void config_load(int argc, char **argv) {
+  char *env, buf[1024];
+  int r;
+
+  for(r=0; r<argc; r++)
+    if(strcmp(argv[r], "--ignore-config") == 0) return;
+
+  config_read("/etc/ncdu.conf");
+
+  if((env = getenv("XDG_CONFIG_HOME")) != NULL) {
+    r = snprintf(buf, 1024, "%s/ncdu/config", env);
+    if(r > 0 && r < 1024) config_read(buf);
+  } else if((env = getenv("HOME")) != NULL) {
+    r = snprintf(buf, 1024, "%s/.config/ncdu/config", env);
+    if(r > 0 && r < 1024) config_read(buf);
+  }
+}
+
+
 static void argv_parse(int argc, char **argv) {
-  yopt_t yopt;
-  int v;
-  char *val;
+  int r;
   char *export = NULL;
   char *import = NULL;
   char *dir = NULL;
 
-  static yopt_opt_t opts[] = {
-    { 'h', 0, "-h,-?,--help" },
-    { 'q', 0, "-q" },
-    { 'v', 0, "-v,-V,--version" },
-    { 'x', 0, "-x" },
-    { 'e', 0, "-e" },
-    { 'r', 0, "-r" },
-    { 'o', 1, "-o" },
-    { 'f', 1, "-f" },
-    { '0', 0, "-0" },
-    { '1', 0, "-1" },
-    { '2', 0, "-2" },
-    {  1,  1, "--exclude" },
-    { 'X', 1, "-X,--exclude-from" },
-    { 'L', 0, "-L,--follow-symlinks" },
-    { 'C', 0, "--exclude-caches" },
-    {  2,  0, "--exclude-kernfs" },
-    {  3,  0, "--follow-firmlinks" }, /* undocumented, this behavior is the current default */
-    {  4,  0, "--exclude-firmlinks" },
-    { 's', 0, "--si" },
-    { 'Q', 0, "--confirm-quit" },
-    { 'c', 1, "--color" },
-    {0,0,NULL}
-  };
+  memset(&argparser_state, 0, sizeof(struct argparser));
+  argparser_state.argv = argv;
+  argparser_state.argc = argc;
+  argparser_next(&argparser_state); /* skip program name */
 
-  dir_ui = -1;
-  si = 0;
-
-  yopt_init(&yopt, argc, argv, opts);
-  while((v = yopt_next(&yopt, &val)) != -1) {
-    switch(v) {
-    case  0 : dir = val; break;
-    case 'h':
-      printf("ncdu <options> <directory>\n\n");
-      printf("  -h,--help                  This help message\n");
-      printf("  -q                         Quiet mode, refresh interval 2 seconds\n");
-      printf("  -v,-V,--version            Print version\n");
-      printf("  -x                         Same filesystem\n");
-      printf("  -e                         Enable extended information\n");
-      printf("  -r                         Read only\n");
-      printf("  -o FILE                    Export scanned directory to FILE\n");
-      printf("  -f FILE                    Import scanned directory from FILE\n");
-      printf("  -0,-1,-2                   UI to use when scanning (0=none,2=full ncurses)\n");
-      printf("  --si                       Use base 10 (SI) prefixes instead of base 2\n");
-      printf("  --exclude PATTERN          Exclude files that match PATTERN\n");
-      printf("  -X, --exclude-from FILE    Exclude files that match any pattern in FILE\n");
-      printf("  -L, --follow-symlinks      Follow symbolic links (excluding directories)\n");
-      printf("  --exclude-caches           Exclude directories containing CACHEDIR.TAG\n");
-#if HAVE_LINUX_MAGIC_H && HAVE_SYS_STATFS_H && HAVE_STATFS
-      printf("  --exclude-kernfs           Exclude Linux pseudo filesystems (procfs,sysfs,cgroup,...)\n");
-#endif
-#if HAVE_SYS_ATTR_H && HAVE_GETATTRLIST && HAVE_DECL_ATTR_CMNEXT_NOFIRMLINKPATH
-      printf("  --exclude-firmlinks        Exclude firmlinks on macOS\n");
-#endif
-      printf("  --confirm-quit             Confirm quitting ncdu\n");
-      printf("  --color SCHEME             Set color scheme (off/dark)\n");
-      exit(0);
-    case 'q': update_delay = 2000; break;
-    case 'v':
+  while((r = argparser_next(&argparser_state)) > 0) {
+    if(r == 2) dir = argparser_state.last;
+    else if(OPT("-v") || OPT("-V") || OPT("--version")) {
       printf("ncdu %s\n", PACKAGE_VERSION);
       exit(0);
-    case 'x': dir_scan_smfs = 1; break;
-    case 'e': extended_info = 1; break;
-    case 'r': read_only++; break;
-    case 's': si = 1; break;
-    case 'o': export = val; break;
-    case 'f': import = val; break;
-    case '0': dir_ui = 0; break;
-    case '1': dir_ui = 1; break;
-    case '2': dir_ui = 2; break;
-    case 'Q': confirm_quit = 1; break;
-    case  1 : exclude_add(val); break; /* --exclude */
-    case 'X':
-      if(exclude_addfile(val)) {
-        fprintf(stderr, "Can't open %s: %s\n", val, strerror(errno));
-        exit(1);
-      }
-      break;
-    case 'L': follow_symlinks = 1; break;
-    case 'C':
-      cachedir_tags = 1;
-      break;
-
-    case  2 : /* --exclude-kernfs */
-#if HAVE_LINUX_MAGIC_H && HAVE_SYS_STATFS_H && HAVE_STATFS
-      exclude_kernfs = 1; break;
-#else
-      fprintf(stderr, "This feature is not supported on your platform\n");
-      exit(1);
-#endif
-    case  3 : /* --follow-firmlinks */
-#if HAVE_SYS_ATTR_H && HAVE_GETATTRLIST && HAVE_DECL_ATTR_CMNEXT_NOFIRMLINKPATH
-      follow_firmlinks = 1; break;
-#else
-      fprintf(stderr, "This feature is not supported on your platform\n");
-      exit(1);
-#endif
-    case  4 : /* --exclude-firmlinks */
-#if HAVE_SYS_ATTR_H && HAVE_GETATTRLIST && HAVE_DECL_ATTR_CMNEXT_NOFIRMLINKPATH
-      follow_firmlinks = 0; break;
-#else
-      fprintf(stderr, "This feature is not supported on your platform\n");
-      exit(1);
-#endif
-    case 'c':
-      if(strcmp(val, "off") == 0)  { uic_theme = 0; }
-      else if(strcmp(val, "dark") == 0) { uic_theme = 1; }
-      else {
-        fprintf(stderr, "Unknown --color option: %s\n", val);
-        exit(1);
-      }
-      break;
-    case -2:
-      fprintf(stderr, "ncdu: %s.\n", val);
-      exit(1);
-    }
+    } else if(OPT("-h") || OPT("-?") || OPT("--help")) arg_help();
+    else if(OPT("-o")) export = ARG;
+    else if(OPT("-f")) import = ARG;
+    else if(OPT("--ignore-config")) {}
+    else if(!arg_option(0)) die("Unknown option '%s'.\n", argparser_state.last);
   }
 
+#if !(HAVE_LINUX_MAGIC_H && HAVE_SYS_STATFS_H && HAVE_STATFS)
+  if(exclude_kernfs) die("The --exclude-kernfs flag is currently only supported on Linux.\n");
+#endif
+
   if(export) {
-    if(dir_export_init(export)) {
-      fprintf(stderr, "Can't open %s: %s\n", export, strerror(errno));
-      exit(1);
-    }
-    if(strcmp(export, "-") == 0)
-      ncurses_tty = 1;
+    if(dir_export_init(export)) die("Can't open %s: %s\n", export, strerror(errno));
+    if(strcmp(export, "-") == 0) ncurses_tty = 1;
   } else
     dir_mem_init(NULL);
 
   if(import) {
-    if(dir_import_init(import)) {
-      fprintf(stderr, "Can't open %s: %s\n", import, strerror(errno));
-      exit(1);
-    }
-    if(strcmp(import, "-") == 0)
-      ncurses_tty = 1;
+    if(dir_import_init(import)) die("Can't open %s: %s\n", import, strerror(errno));
+    if(strcmp(import, "-") == 0) ncurses_tty = 1;
   } else
     dir_scan_init(dir ? dir : ".");
 
@@ -264,6 +461,10 @@ static void argv_parse(int argc, char **argv) {
    * feedback when exporting to stdout. */
   if(dir_ui == -1)
     dir_ui = export && strcmp(export, "-") == 0 ? 0 : export ? 1 : 2;
+
+  if(can_delete == -1)  can_delete  = import ? 0 : 1;
+  if(can_shell == -1)   can_shell   = import ? 0 : 1;
+  if(can_refresh == -1) can_refresh = import ? 0 : 1;
 }
 
 
@@ -279,10 +480,7 @@ static void init_nc(void) {
 
   if(ncurses_tty) {
     tty = fopen("/dev/tty", "r+");
-    if(!tty) {
-      fprintf(stderr, "Error opening /dev/tty: %s\n", strerror(errno));
-      exit(1);
-    }
+    if(!tty) die("Error opening /dev/tty: %s\n", strerror(errno));
     term = newterm(NULL, tty, tty);
     if(term)
       set_term(term);
@@ -291,29 +489,24 @@ static void init_nc(void) {
     /* Make sure the user doesn't accidentally pipe in data to ncdu's standard
      * input without using "-f -". An annoying input sequence could result in
      * the deletion of your files, which we want to prevent at all costs. */
-    if(!isatty(0)) {
-      fprintf(stderr, "Standard input is not a TTY. Did you mean to import a file using '-f -'?\n");
-      exit(1);
-    }
+    if(!isatty(0)) die("Standard input is not a TTY. Did you mean to import a file using '-f -'?\n");
     ok = !!initscr();
   }
 
-  if(!ok) {
-    fprintf(stderr, "Error while initializing ncurses.\n");
-    exit(1);
-  }
+  if(!ok) die("Error while initializing ncurses.\n");
 
   uic_init();
   cbreak();
   noecho();
   curs_set(0);
   keypad(stdscr, TRUE);
+  bkgd(COLOR_PAIR(UIC_DEFAULT+1));
   if(ncresize(min_rows, min_cols))
     min_rows = min_cols = 0;
 }
 
 
-void close_nc() {
+void close_nc(void) {
   if(ncurses_init) {
     erase();
     refresh();
@@ -322,9 +515,9 @@ void close_nc() {
 }
 
 
-/* main program */
 int main(int argc, char **argv) {
   read_locale();
+  config_load(argc, argv);
   argv_parse(argc, argv);
 
   if(dir_ui == 2)

src/path.c

@@ -1,6 +1,6 @@
 /* ncdu - NCurses Disk Usage
 
-  Copyright (c) 2007-2020 Yoran Heling
+  Copyright (c) Yorhel
 
   Permission is hereby granted, free of charge, to any person obtaining
   a copy of this software and associated documentation files (the

src/path.h

@@ -1,6 +1,6 @@
 /* ncdu - NCurses Disk Usage
 
-  Copyright (c) 2007-2020 Yoran Heling
+  Copyright (c) Yorhel
 
   Permission is hereby granted, free of charge, to any person obtaining
   a copy of this software and associated documentation files (the

src/quit.c

@@ -1,6 +1,6 @@
 /* ncdu - NCurses Disk Usage
 
-  Copyright (c) 2015-2020 Yoran Heling
+  Copyright (c) Yorhel
 
   Permission is hereby granted, free of charge, to any person obtaining
   a copy of this software and associated documentation files (the
@@ -38,13 +38,13 @@ int quit_key(int ch) {
   return 0;
 }
 
-void quit_draw() {
+void quit_draw(void) {
   browse_draw();
 
   nccreate(4,30, "ncdu confirm quit");
   ncaddstr(2,2, "Really quit? (y/N)");
 }
 
-void quit_init() {
+void quit_init(void) {
   pstate = ST_QUIT;
 }

src/quit.h

@@ -1,6 +1,6 @@
 /* ncdu - NCurses Disk Usage
 
-  Copyright (c) 2015-2020 Yoran Heling
+  Copyright (c) Yorhel
 
   Permission is hereby granted, free of charge, to any person obtaining
   a copy of this software and associated documentation files (the

src/shell.c

@@ -1,6 +1,6 @@
 /* ncdu - NCurses Disk Usage
 
-  Copyright (c) 2007-2020 Yoran Heling
+  Copyright (c) Yorhel
   Shell support: Copyright (c) 2014 Thomas Jarosch
 
   Permission is hereby granted, free of charge, to any person obtaining
@@ -34,7 +34,24 @@
 #include <unistd.h>
 #include <sys/wait.h>
 
-void shell_draw() {
+static void set_level(void) {
+  static int done = 0;
+  const char *lvl;
+  char nlvl[2];
+  if(done)
+    return;
+  lvl = getenv("NCDU_LEVEL");
+  /* too lazy to count beyond 9 */
+  if(lvl && *lvl >= '1' && *lvl < '9' && lvl[1] == 0) {
+    nlvl[0] = 1 + *lvl;
+    nlvl[1] = 0;
+    setenv("NCDU_LEVEL", nlvl, 1);
+  } else
+    setenv("NCDU_LEVEL", "1", 1);
+  done++;
+}
+
+void shell_draw(void) {
   const char *full_path;
   int res;
 
@@ -59,6 +76,7 @@ void shell_draw() {
         shell = DEFAULT_SHELL;
     }
 
+    set_level();
     res = system(shell);
 
     /* resume ncurses mode */
@@ -77,6 +95,6 @@ void shell_draw() {
   pstate = ST_BROWSE;
 }
 
-void shell_init() {
+void shell_init(void) {
   pstate = ST_SHELL;
 }

src/shell.h

@@ -1,6 +1,6 @@
 /* ncdu - NCurses Disk Usage
 
-  Copyright (c) 2007-2020 Yoran Heling
+  Copyright (c) Yorhel
   Shell support: Copyright (c) 2014 Thomas Jarosch
 
   Permission is hereby granted, free of charge, to any person obtaining

src/util.c

@@ -1,6 +1,6 @@
 /* ncdu - NCurses Disk Usage
 
-  Copyright (c) 2007-2020 Yoran Heling
+  Copyright (c) Yorhel
 
   Permission is hereby granted, free of charge, to any person obtaining
   a copy of this software and associated documentation files (the
@@ -30,17 +30,27 @@
 #include <ncurses.h>
 #include <stdarg.h>
 #include <unistd.h>
+#include <pwd.h>
+
 #ifdef HAVE_LOCALE_H
 #include <locale.h>
 #endif
 
-int uic_theme;
+int uic_theme = 0;
 int winrows, wincols;
 int subwinr, subwinc;
-int si;
 static char thou_sep;
 
 
+void die(const char *fmt, ...) {
+  va_list arg;
+  va_start(arg, fmt);
+  vfprintf(stderr, fmt, arg);
+  va_end(arg);
+  exit(1);
+}
+
+
 char *cropstr(const char *from, int s) {
   static char dat[4096];
   int i, j, o = strlen(from);
@@ -66,7 +76,7 @@ float formatsize(int64_t from, const char **unit) {
   float r = from;
   if (si) {
     if(r < 1000.0f)   { *unit = " B"; }
-    else if(r < 1e6f) { *unit = "KB"; r/=1e3f; }
+    else if(r < 1e6f) { *unit = "kB"; r/=1e3f; }
     else if(r < 1e9f) { *unit = "MB"; r/=1e6f; }
     else if(r < 1e12f){ *unit = "GB"; r/=1e9f; }
     else if(r < 1e15f){ *unit = "TB"; r/=1e12f; }
@@ -134,23 +144,26 @@ char *fmtmode(unsigned short mode) {
          : ft == S_IFBLK  ? 'b' : '?';
   buf[1] = mode & 0400 ? 'r' : '-';
   buf[2] = mode & 0200 ? 'w' : '-';
-  buf[3] = mode & 0100 ? 'x' : '-';
+  buf[3] = mode &04000 ? 's' : mode & 0100 ? 'x' : '-';
   buf[4] = mode & 0040 ? 'r' : '-';
   buf[5] = mode & 0020 ? 'w' : '-';
-  buf[6] = mode & 0010 ? 'x' : '-';
+  buf[6] = mode &02000 ? 's' : mode & 0010 ? 'x' : '-';
   buf[7] = mode & 0004 ? 'r' : '-';
   buf[8] = mode & 0002 ? 'w' : '-';
-  buf[9] = mode & 0001 ? 'x' : '-';
+  buf[9] = mode &01000 ? (S_ISDIR(mode) ? 't' : 'T') : mode & 0001 ? 'x' : '-';
   buf[10] = 0;
   return buf;
 }
 
 
-void read_locale() {
+void read_locale(void) {
+#ifdef HAVE_LOCALE_H
+  char *locale_thou_sep;
+#endif
   thou_sep = '.';
 #ifdef HAVE_LOCALE_H
   setlocale(LC_ALL, "");
-  char *locale_thou_sep = localeconv()->thousands_sep;
+  locale_thou_sep = localeconv()->thousands_sep;
   if(locale_thou_sep && 1 == strlen(locale_thou_sep))
     thou_sep = locale_thou_sep[0];
 #endif
@@ -250,21 +263,27 @@ static const struct {
   short fg, bg;
   int attr;
 } color_defs[] = {
-#define C(name, off_fg, off_bg, off_a, dark_fg, dark_bg, dark_a) \
-  {off_fg,  off_bg,  off_a}, \
-  {dark_fg, dark_bg, dark_a},
+#define COLOR__ -1
+#define B A_BOLD
+#define R A_REVERSE
+#define C(name, off_fg, off_bg, off_a, dark_fg, dark_bg, dark_a, darkbg_fg, darkbg_bg, darkbg_a) \
+  {COLOR_##off_fg,    COLOR_##off_bg,    off_a}, \
+  {COLOR_##dark_fg,   COLOR_##dark_bg,   dark_a}, \
+  {COLOR_##darkbg_fg, COLOR_##darkbg_bg, darkbg_a},
   UI_COLORS
+#undef B
+#undef R
 #undef C
   {0,0,0}
 };
 
-void uic_init() {
+void uic_init(void) {
   size_t i, j;
 
   start_color();
   use_default_colors();
   for(i=0; i<sizeof(colors)/sizeof(*colors)-1; i++) {
-    j = i*2 + uic_theme;
+    j = i*3 + uic_theme;
     init_pair(i+1, color_defs[j].fg, color_defs[j].bg);
     colors[i] = color_defs[j].attr | COLOR_PAIR(i+1);
   }
@@ -424,7 +443,7 @@ void addparentstats(struct dir *d, int64_t size, int64_t asize, uint64_t mtime,
   char buf[128];\
   while((ptr = f) == NULL) {\
     close_nc();\
-    write(2, oom_msg, sizeof(oom_msg));\
+    write(2, oom_msg, sizeof(oom_msg)-1);\
     read(0, buf, sizeof(buf));\
   }\
   return ptr;
@@ -432,3 +451,47 @@ void addparentstats(struct dir *d, int64_t size, int64_t asize, uint64_t mtime,
 void *xmalloc(size_t size) { wrap_oom(malloc(size)) }
 void *xcalloc(size_t n, size_t size) { wrap_oom(calloc(n, size)) }
 void *xrealloc(void *mem, size_t size) { wrap_oom(realloc(mem, size)) }
+
+char *xstrdup(const char *str) {
+  char *r = xmalloc(strlen(str)+1);
+  strcpy(r, str);
+  return r;
+}
+
+
+/* Expands '~' and '~user' */
+char *expanduser(const char *path) {
+  size_t len, size;
+  struct passwd *pwd;
+  char *home = NULL, *tmp;
+
+  if(path[0] != '~') return xstrdup(path);
+  len = strcspn(path+1, "/");
+
+  if(len == 0) {
+    home = getenv("HOME");
+    if(!home) {
+      pwd = getpwuid(getuid());
+      if(pwd) home = pwd->pw_dir;
+    }
+  } else {
+    tmp = xmalloc(len+1);
+    memcpy(tmp, path+1, len);
+    tmp[len] = 0;
+    pwd = getpwnam(tmp);
+    free(tmp);
+    if(pwd) home = pwd->pw_dir;
+  }
+  if(!home) return xstrdup(path);
+
+  size = strlen(home);
+  while(size > 0 && home[size-1] == '/') size--;
+  home[size] = 0;
+
+  if(size == 0 && path[len+1] == 0) return xstrdup("/");
+
+  size += strlen(path) - len;
+  tmp = xmalloc(size);
+  snprintf(tmp, size, "%s%s", home, path+1+len);
+  return tmp;
+}

src/util.h

@@ -1,6 +1,6 @@
 /* ncdu - NCurses Disk Usage
 
-  Copyright (c) 2007-2020 Yoran Heling
+  Copyright (c) Yorhel
 
   Permission is hereby granted, free of charge, to any person obtaining
   a copy of this software and associated documentation files (the
@@ -30,25 +30,27 @@
 #include <ncurses.h>
 
 
+void die(const char *, ...);
+
+
 /* UI colors: (foreground, background, attrs)
- *  NAME         OFF                        DARK
- */
+ *  NAME         OFF         DARK                DARK-BG   */
 #define UI_COLORS \
-  C(DEFAULT,     -1,-1,0               ,    -1,           -1,         0     )\
-  C(BOX_TITLE,   -1,-1,A_BOLD          ,    COLOR_BLUE,   -1,         A_BOLD)\
-  C(HD,          -1,-1,A_REVERSE       ,    COLOR_BLACK,  COLOR_CYAN, 0     )    /* header & footer */\
-  C(SEL,         -1,-1,A_REVERSE       ,    COLOR_WHITE,  COLOR_GREEN,A_BOLD)\
-  C(NUM,         -1,-1,0               ,    COLOR_YELLOW, -1,         A_BOLD)\
-  C(NUM_HD,      -1,-1,A_REVERSE       ,    COLOR_YELLOW, COLOR_CYAN, A_BOLD)\
-  C(NUM_SEL,     -1,-1,A_REVERSE       ,    COLOR_YELLOW, COLOR_GREEN,A_BOLD)\
-  C(KEY,         -1,-1,A_BOLD          ,    COLOR_YELLOW, -1,         A_BOLD)\
-  C(KEY_HD,      -1,-1,A_BOLD|A_REVERSE,    COLOR_YELLOW, COLOR_CYAN, A_BOLD)\
-  C(DIR,         -1,-1,0               ,    COLOR_BLUE,   -1,         A_BOLD)\
-  C(DIR_SEL,     -1,-1,A_REVERSE       ,    COLOR_BLUE,   COLOR_GREEN,A_BOLD)\
-  C(FLAG,        -1,-1,0               ,    COLOR_RED,    -1,         0     )\
-  C(FLAG_SEL,    -1,-1,A_REVERSE       ,    COLOR_RED,    COLOR_GREEN,0     )\
-  C(GRAPH,       -1,-1,0               ,    COLOR_MAGENTA,-1,         0     )\
-  C(GRAPH_SEL,   -1,-1,A_REVERSE       ,    COLOR_MAGENTA,COLOR_GREEN,0     )
+  C(DEFAULT,     _,_,0  ,    _,      _,    0,    WHITE,  BLACK,0)\
+  C(BOX_TITLE,   _,_,B  ,    BLUE,   _,    B,    BLUE,   BLACK,B)\
+  C(HD,          _,_,R  ,    BLACK,  CYAN, 0,    BLACK,  CYAN, 0)    /* header & footer */\
+  C(SEL,         _,_,R  ,    WHITE,  GREEN,B,    WHITE,  GREEN,B)\
+  C(NUM,         _,_,0  ,    YELLOW, _,    B,    YELLOW, BLACK,B)\
+  C(NUM_HD,      _,_,R  ,    YELLOW, CYAN, B,    YELLOW, CYAN, B)\
+  C(NUM_SEL,     _,_,R  ,    YELLOW, GREEN,B,    YELLOW, GREEN,B)\
+  C(KEY,         _,_,B  ,    YELLOW, _,    B,    YELLOW, BLACK,B)\
+  C(KEY_HD,      _,_,B|R,    YELLOW, CYAN, B,    YELLOW, CYAN, B)\
+  C(DIR,         _,_,0  ,    BLUE,   _,    B,    BLUE,   BLACK,B)\
+  C(DIR_SEL,     _,_,R  ,    BLUE,   GREEN,B,    BLUE,   GREEN,B)\
+  C(FLAG,        _,_,0  ,    RED,    _,    0,    RED,    BLACK,0)\
+  C(FLAG_SEL,    _,_,R  ,    RED,    GREEN,0,    RED,    GREEN,0)\
+  C(GRAPH,       _,_,0  ,    MAGENTA,_,    0,    MAGENTA,BLACK,0)\
+  C(GRAPH_SEL,   _,_,R  ,    MAGENTA,GREEN,0,    MAGENTA,GREEN,0)
 
 enum ui_coltype {
 #define C(name, ...) UIC_##name,
@@ -74,17 +76,12 @@ extern int subwinr, subwinc;
 extern int si;
 
 
-/* Macros/functions for managing struct dir and struct dir_ext */
+/* Macros for managing struct dir and struct dir_ext */
 
 #define dir_memsize(n)     (offsetof(struct dir, name)+1+strlen(n))
 #define dir_ext_offset(n)  ((dir_memsize(n) + 7) & ~7)
 #define dir_ext_memsize(n) (dir_ext_offset(n) + sizeof(struct dir_ext))
-
-static inline struct dir_ext *dir_ext_ptr(struct dir *d) {
-  return d->flags & FF_EXT
-    ? (struct dir_ext *) ( ((char *)d) + dir_ext_offset(d->name) )
-    : NULL;
-}
+#define dir_ext_ptr(d)     ((d)->flags & FF_EXT ? (struct dir_ext *) ( ((char *)(d)) + dir_ext_offset((d)->name) ) : NULL)
 
 
 /* Instead of using several ncurses windows, we only draw to stdscr.
@@ -191,5 +188,9 @@ void *xmalloc(size_t);
 void *xcalloc(size_t, size_t);
 void *xrealloc(void *, size_t);
 
+char *xstrdup(const char *);
+
+char *expanduser(const char *);
+
 #endif
 

static/build.sh

@@ -1,130 +0,0 @@
-#!/bin/sh
-
-# This script is based on static/build.sh from the ncdc git repo.
-# Only i486 and arm arches are supported. i486 should perform well enough, so
-# x86_64 isn't really necessary. I can't test any other arches.
-#
-# This script assumes that you have the musl-cross cross compilers installed in
-# $MUSL_CROSS_PATH.
-#
-# Usage:
-#   ./build.sh $arch
-#   where $arch = 'arm', 'i486' or 'x86_64'
-
-MUSL_CROSS_PATH=/opt/cross
-NCURSES_VERSION=6.0
-
-export CFLAGS="-O3 -g -static"
-
-# (The variables below are automatically set by the functions, they're defined
-# here to make sure they have global scope and for documentation purposes.)
-
-# This is the arch we're compiling for, e.g. arm/mipsel.
-TARGET=
-# This is the name of the toolchain we're using, and thus the value we should
-# pass to autoconf's --host argument.
-HOST=
-# Installation prefix.
-PREFIX=
-# Path of the extracted source code of the package we're currently building.
-srcdir=
-
-mkdir -p tarballs
-
-
-# "Fetch, Extract, Move"
-fem() { # base-url name targerdir extractdir
-  echo "====== Fetching and extracting $1 $2"
-  cd tarballs
-  if [ -n "$4" ]; then
-    EDIR="$4"
-  else
-    EDIR=$(basename $(basename $(basename $2 .tar.bz2) .tar.gz) .tar.xz)
-  fi
-  if [ ! -e "$2" ]; then
-    wget "$1$2" || exit
-  fi
-  if [ ! -d "$3" ]; then
-    tar -xvf "$2" || exit
-    mv "$EDIR" "$3"
-  fi
-  cd ..
-}
-
-
-prebuild() { # dirname
-  if [ -e "$TARGET/$1/_built" ]; then
-    echo "====== Skipping build for $TARGET/$1 (assumed to be done)"
-    return 1
-  fi
-  echo "====== Starting build for $TARGET/$1"
-  rm -rf "$TARGET/$1"
-  mkdir -p "$TARGET/$1"
-  cd "$TARGET/$1"
-  srcdir="../../tarballs/$1"
-  return 0
-}
-
-
-postbuild() {
-  touch _built
-  cd ../..
-}
-
-
-getncurses() {
-  fem http://ftp.gnu.org/pub/gnu/ncurses/ ncurses-$NCURSES_VERSION.tar.gz ncurses
-  prebuild ncurses || return
-  $srcdir/configure --prefix=$PREFIX\
-    --without-cxx --without-cxx-binding --without-ada --without-manpages --without-progs\
-    --without-tests --without-curses-h --without-pkg-config --without-shared --without-debug\
-    --without-gpm --without-sysmouse --enable-widec --with-default-terminfo-dir=/usr/share/terminfo\
-    --with-terminfo-dirs=/usr/share/terminfo:/lib/terminfo:/usr/local/share/terminfo\
-    --with-fallbacks="screen linux vt100 xterm xterm-256color" --host=$HOST\
-    CPPFLAGS=-D_GNU_SOURCE || exit
-  make || exit
-  make install.libs || exit
-  postbuild
-}
-
-
-getncdu() {
-  prebuild ncdu || return
-  srcdir=../../..
-  $srcdir/configure --host=$HOST --with-ncursesw PKG_CONFIG=false\
-    CPPFLAGS="-I$PREFIX/include -I$PREFIX/include/ncursesw"\
-    LDFLAGS="-static -L$PREFIX/lib -lncursesw" CFLAGS="$CFLAGS -Wall -Wextra" || exit
-  make || exit
-
-  VER=`cd '../../..' && git describe --abbrev=5 --dirty= | sed s/^v//`
-  tar -czf ../../ncdu-linux-$TARGET-$VER-unstripped.tar.gz ncdu
-  $HOST-strip ncdu
-  tar -czf ../../ncdu-linux-$TARGET-$VER.tar.gz ncdu
-  echo "====== ncdu-linux-$TARGET-$VER.tar.gz and -unstripped created."
-
-  postbuild
-}
-
-
-buildarch() {
-  TARGET=$1
-  case $TARGET in
-    arm)    HOST=arm-linux-musleabi  DIR=arm-linux-musleabi ;;
-    aarch64)HOST=aarch64-linux-musl  DIR=aarch64-linux-musl ;;
-    i486)   HOST=i486-linux-musl     DIR=i486-linux-musl    ;;
-    x86_64) HOST=x86_64-linux-musl   DIR=x86_64-linux-musl  ;;
-    *)      echo "Unknown target: $TARGET" ;;
-  esac
-  PREFIX="`pwd`/$TARGET/inst"
-  mkdir -p $TARGET $PREFIX
-  ln -s lib $PREFIX/lib64
-
-  OLDPATH="$PATH"
-  export PATH="$PATH:$MUSL_CROSS_PATH/$DIR/bin"
-  getncurses
-  getncdu
-  PATH="$OLDPATH"
-}
-
-
-buildarch $1