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ls.c
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/* 'dir', 'vdir' and 'ls' directory listing programs for GNU.
Copyright (C) 1985-2020 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
/* If ls_mode is LS_MULTI_COL,
the multi-column format is the default regardless
of the type of output device.
This is for the 'dir' program.
If ls_mode is LS_LONG_FORMAT,
the long format is the default regardless of the
type of output device.
This is for the 'vdir' program.
If ls_mode is LS_LS,
the output format depends on whether the output
device is a terminal.
This is for the 'ls' program. */
/* Written by Richard Stallman and David MacKenzie. */
/* Color support by Peter Anvin <[email protected]> and Dennis
Flaherty <[email protected]> based on original patches by
Greg Lee <[email protected]>. */
#include <config.h>
#include <sys/types.h>
#include <termios.h>
#if HAVE_STROPTS_H
# include <stropts.h>
#endif
#include <sys/ioctl.h>
#ifdef WINSIZE_IN_PTEM
# include <sys/stream.h>
# include <sys/ptem.h>
#endif
#include <stdio.h>
#include <assert.h>
#include <setjmp.h>
#include <pwd.h>
#include <getopt.h>
#include <signal.h>
#include <selinux/selinux.h>
#include <wchar.h>
#if HAVE_LANGINFO_CODESET
# include <langinfo.h>
#endif
/* Use SA_NOCLDSTOP as a proxy for whether the sigaction machinery is
present. */
#ifndef SA_NOCLDSTOP
# define SA_NOCLDSTOP 0
# define sigprocmask(How, Set, Oset) /* empty */
# define sigset_t int
# if ! HAVE_SIGINTERRUPT
# define siginterrupt(sig, flag) /* empty */
# endif
#endif
/* NonStop circa 2011 lacks both SA_RESTART and siginterrupt, so don't
restart syscalls after a signal handler fires. This may cause
colors to get messed up on the screen if 'ls' is interrupted, but
that's the best we can do on such a platform. */
#ifndef SA_RESTART
# define SA_RESTART 0
#endif
#include "system.h"
#include <fnmatch.h>
#include "acl.h"
#include "argmatch.h"
#include "c-strcase.h"
#include "dev-ino.h"
#include "die.h"
#include "error.h"
#include "filenamecat.h"
#include "hard-locale.h"
#include "hash.h"
#include "human.h"
#include "filemode.h"
#include "filevercmp.h"
#include "idcache.h"
#include "ls.h"
#include "mbswidth.h"
#include "mpsort.h"
#include "obstack.h"
#include "quote.h"
#include "smack.h"
#include "stat-size.h"
#include "stat-time.h"
#include "strftime.h"
#include "xdectoint.h"
#include "xstrtol.h"
#include "xstrtol-error.h"
#include "areadlink.h"
#include "mbsalign.h"
#include "dircolors.h"
#include "xgethostname.h"
#include "c-ctype.h"
#include "canonicalize.h"
#include "statx.h"
/* Include <sys/capability.h> last to avoid a clash of <sys/types.h>
include guards with some premature versions of libcap.
For more details, see <https://bugzilla.redhat.com/483548>. */
#ifdef HAVE_CAP
# include <sys/capability.h>
#endif
#define PROGRAM_NAME (ls_mode == LS_LS ? "ls" \
: (ls_mode == LS_MULTI_COL \
? "dir" : "vdir"))
#define AUTHORS \
proper_name ("Richard M. Stallman"), \
proper_name ("David MacKenzie")
#define obstack_chunk_alloc malloc
#define obstack_chunk_free free
/* Return an int indicating the result of comparing two integers.
Subtracting doesn't always work, due to overflow. */
#define longdiff(a, b) ((a) < (b) ? -1 : (a) > (b))
/* Unix-based readdir implementations have historically returned a dirent.d_ino
value that is sometimes not equal to the stat-obtained st_ino value for
that same entry. This error occurs for a readdir entry that refers
to a mount point. readdir's error is to return the inode number of
the underlying directory -- one that typically cannot be stat'ed, as
long as a file system is mounted on that directory. RELIABLE_D_INO
encapsulates whether we can use the more efficient approach of relying
on readdir-supplied d_ino values, or whether we must incur the cost of
calling stat or lstat to obtain each guaranteed-valid inode number. */
#ifndef READDIR_LIES_ABOUT_MOUNTPOINT_D_INO
# define READDIR_LIES_ABOUT_MOUNTPOINT_D_INO 1
#endif
#if READDIR_LIES_ABOUT_MOUNTPOINT_D_INO
# define RELIABLE_D_INO(dp) NOT_AN_INODE_NUMBER
#else
# define RELIABLE_D_INO(dp) D_INO (dp)
#endif
#if ! HAVE_STRUCT_STAT_ST_AUTHOR
# define st_author st_uid
#endif
enum filetype
{
unknown,
fifo,
chardev,
directory,
blockdev,
normal,
symbolic_link,
sock,
whiteout,
arg_directory
};
/* Display letters and indicators for each filetype.
Keep these in sync with enum filetype. */
static char const filetype_letter[] = "?pcdb-lswd";
/* Ensure that filetype and filetype_letter have the same
number of elements. */
verify (sizeof filetype_letter - 1 == arg_directory + 1);
#define FILETYPE_INDICATORS \
{ \
C_ORPHAN, C_FIFO, C_CHR, C_DIR, C_BLK, C_FILE, \
C_LINK, C_SOCK, C_FILE, C_DIR \
}
enum acl_type
{
ACL_T_NONE,
ACL_T_LSM_CONTEXT_ONLY,
ACL_T_YES
};
struct fileinfo
{
/* The file name. */
char *name;
/* For symbolic link, name of the file linked to, otherwise zero. */
char *linkname;
/* For terminal hyperlinks. */
char *absolute_name;
struct stat stat;
enum filetype filetype;
/* For symbolic link and long listing, st_mode of file linked to, otherwise
zero. */
mode_t linkmode;
/* security context. */
char *scontext;
bool stat_ok;
/* For symbolic link and color printing, true if linked-to file
exists, otherwise false. */
bool linkok;
/* For long listings, true if the file has an access control list,
or a security context. */
enum acl_type acl_type;
/* For color listings, true if a regular file has capability info. */
bool has_capability;
/* Whether file name needs quoting. tri-state with -1 == unknown. */
int quoted;
};
#define LEN_STR_PAIR(s) sizeof (s) - 1, s
/* Null is a valid character in a color indicator (think about Epson
printers, for example) so we have to use a length/buffer string
type. */
struct bin_str
{
size_t len; /* Number of bytes */
const char *string; /* Pointer to the same */
};
#if ! HAVE_TCGETPGRP
# define tcgetpgrp(Fd) 0
#endif
static size_t quote_name (char const *name,
struct quoting_options const *options,
int needs_general_quoting,
const struct bin_str *color,
bool allow_pad, struct obstack *stack,
char const *absolute_name);
static size_t quote_name_buf (char **inbuf, size_t bufsize, char *name,
struct quoting_options const *options,
int needs_general_quoting, size_t *width,
bool *pad);
static char *make_link_name (char const *name, char const *linkname);
static int decode_switches (int argc, char **argv);
static bool file_ignored (char const *name);
static uintmax_t gobble_file (char const *name, enum filetype type,
ino_t inode, bool command_line_arg,
char const *dirname);
static const struct bin_str * get_color_indicator (const struct fileinfo *f,
bool symlink_target);
static bool print_color_indicator (const struct bin_str *ind);
static void put_indicator (const struct bin_str *ind);
static void add_ignore_pattern (const char *pattern);
static void attach (char *dest, const char *dirname, const char *name);
static void clear_files (void);
static void extract_dirs_from_files (char const *dirname,
bool command_line_arg);
static void get_link_name (char const *filename, struct fileinfo *f,
bool command_line_arg);
static void indent (size_t from, size_t to);
static size_t calculate_columns (bool by_columns);
static void print_current_files (void);
static void print_dir (char const *name, char const *realname,
bool command_line_arg);
static size_t print_file_name_and_frills (const struct fileinfo *f,
size_t start_col);
static void print_horizontal (void);
static int format_user_width (uid_t u);
static int format_group_width (gid_t g);
static void print_long_format (const struct fileinfo *f);
static void print_many_per_line (void);
static size_t print_name_with_quoting (const struct fileinfo *f,
bool symlink_target,
struct obstack *stack,
size_t start_col);
static void prep_non_filename_text (void);
static bool print_type_indicator (bool stat_ok, mode_t mode,
enum filetype type);
static void print_with_separator (char sep);
static void queue_directory (char const *name, char const *realname,
bool command_line_arg);
static void sort_files (void);
static void parse_ls_color (void);
static void getenv_quoting_style (void);
/* Initial size of hash table.
Most hierarchies are likely to be shallower than this. */
#define INITIAL_TABLE_SIZE 30
/* The set of 'active' directories, from the current command-line argument
to the level in the hierarchy at which files are being listed.
A directory is represented by its device and inode numbers (struct dev_ino).
A directory is added to this set when ls begins listing it or its
entries, and it is removed from the set just after ls has finished
processing it. This set is used solely to detect loops, e.g., with
mkdir loop; cd loop; ln -s ../loop sub; ls -RL */
static Hash_table *active_dir_set;
#define LOOP_DETECT (!!active_dir_set)
/* The table of files in the current directory:
'cwd_file' points to a vector of 'struct fileinfo', one per file.
'cwd_n_alloc' is the number of elements space has been allocated for.
'cwd_n_used' is the number actually in use. */
/* Address of block containing the files that are described. */
static struct fileinfo *cwd_file;
/* Length of block that 'cwd_file' points to, measured in files. */
static size_t cwd_n_alloc;
/* Index of first unused slot in 'cwd_file'. */
static size_t cwd_n_used;
/* Whether files needs may need padding due to quoting. */
static bool cwd_some_quoted;
/* Whether quoting style _may_ add outer quotes,
and whether aligning those is useful. */
static bool align_variable_outer_quotes;
/* Vector of pointers to files, in proper sorted order, and the number
of entries allocated for it. */
static void **sorted_file;
static size_t sorted_file_alloc;
/* When true, in a color listing, color each symlink name according to the
type of file it points to. Otherwise, color them according to the 'ln'
directive in LS_COLORS. Dangling (orphan) symlinks are treated specially,
regardless. This is set when 'ln=target' appears in LS_COLORS. */
static bool color_symlink_as_referent;
static char const *hostname;
/* mode of appropriate file for colorization */
#define FILE_OR_LINK_MODE(File) \
((color_symlink_as_referent && (File)->linkok) \
? (File)->linkmode : (File)->stat.st_mode)
/* Record of one pending directory waiting to be listed. */
struct pending
{
char *name;
/* If the directory is actually the file pointed to by a symbolic link we
were told to list, 'realname' will contain the name of the symbolic
link, otherwise zero. */
char *realname;
bool command_line_arg;
struct pending *next;
};
static struct pending *pending_dirs;
/* Current time in seconds and nanoseconds since 1970, updated as
needed when deciding whether a file is recent. */
static struct timespec current_time;
static bool print_scontext;
static char UNKNOWN_SECURITY_CONTEXT[] = "?";
/* Whether any of the files has an ACL. This affects the width of the
mode column. */
static bool any_has_acl;
/* The number of columns to use for columns containing inode numbers,
block sizes, link counts, owners, groups, authors, major device
numbers, minor device numbers, and file sizes, respectively. */
static int inode_number_width;
static int block_size_width;
static int nlink_width;
static int scontext_width;
static int owner_width;
static int group_width;
static int author_width;
static int major_device_number_width;
static int minor_device_number_width;
static int file_size_width;
/* Option flags */
/* long_format for lots of info, one per line.
one_per_line for just names, one per line.
many_per_line for just names, many per line, sorted vertically.
horizontal for just names, many per line, sorted horizontally.
with_commas for just names, many per line, separated by commas.
-l (and other options that imply -l), -1, -C, -x and -m control
this parameter. */
enum format
{
long_format, /* -l and other options that imply -l */
one_per_line, /* -1 */
many_per_line, /* -C */
horizontal, /* -x */
with_commas /* -m */
};
static enum format format;
/* 'full-iso' uses full ISO-style dates and times. 'long-iso' uses longer
ISO-style timestamps, though shorter than 'full-iso'. 'iso' uses shorter
ISO-style timestamps. 'locale' uses locale-dependent timestamps. */
enum time_style
{
full_iso_time_style, /* --time-style=full-iso */
long_iso_time_style, /* --time-style=long-iso */
iso_time_style, /* --time-style=iso */
locale_time_style /* --time-style=locale */
};
static char const *const time_style_args[] =
{
"full-iso", "long-iso", "iso", "locale", NULL
};
static enum time_style const time_style_types[] =
{
full_iso_time_style, long_iso_time_style, iso_time_style,
locale_time_style
};
ARGMATCH_VERIFY (time_style_args, time_style_types);
/* Type of time to print or sort by. Controlled by -c and -u.
The values of each item of this enum are important since they are
used as indices in the sort functions array (see sort_files()). */
enum time_type
{
time_mtime, /* default */
time_ctime, /* -c */
time_atime, /* -u */
time_btime, /* birth time */
time_numtypes /* the number of elements of this enum */
};
static enum time_type time_type;
/* The file characteristic to sort by. Controlled by -t, -S, -U, -X, -v.
The values of each item of this enum are important since they are
used as indices in the sort functions array (see sort_files()). */
enum sort_type
{
sort_none = -1, /* -U */
sort_name, /* default */
sort_extension, /* -X */
sort_size, /* -S */
sort_version, /* -v */
sort_time, /* -t */
sort_numtypes /* the number of elements of this enum */
};
static enum sort_type sort_type;
/* Direction of sort.
false means highest first if numeric,
lowest first if alphabetic;
these are the defaults.
true means the opposite order in each case. -r */
static bool sort_reverse;
/* True means to display owner information. -g turns this off. */
static bool print_owner = true;
/* True means to display author information. */
static bool print_author;
/* True means to display group information. -G and -o turn this off. */
static bool print_group = true;
/* True means print the user and group id's as numbers rather
than as names. -n */
static bool numeric_ids;
/* True means mention the size in blocks of each file. -s */
static bool print_block_size;
/* Human-readable options for output, when printing block counts. */
static int human_output_opts;
/* The units to use when printing block counts. */
static uintmax_t output_block_size;
/* Likewise, but for file sizes. */
static int file_human_output_opts;
static uintmax_t file_output_block_size = 1;
/* Follow the output with a special string. Using this format,
Emacs' dired mode starts up twice as fast, and can handle all
strange characters in file names. */
static bool dired;
/* 'none' means don't mention the type of files.
'slash' means mention directories only, with a '/'.
'file_type' means mention file types.
'classify' means mention file types and mark executables.
Controlled by -F, -p, and --indicator-style. */
enum indicator_style
{
none, /* --indicator-style=none */
slash, /* -p, --indicator-style=slash */
file_type, /* --indicator-style=file-type */
classify /* -F, --indicator-style=classify */
};
static enum indicator_style indicator_style;
/* Names of indicator styles. */
static char const *const indicator_style_args[] =
{
"none", "slash", "file-type", "classify", NULL
};
static enum indicator_style const indicator_style_types[] =
{
none, slash, file_type, classify
};
ARGMATCH_VERIFY (indicator_style_args, indicator_style_types);
/* True means use colors to mark types. Also define the different
colors as well as the stuff for the LS_COLORS environment variable.
The LS_COLORS variable is now in a termcap-like format. */
static bool print_with_color;
static bool print_hyperlink;
/* Whether we used any colors in the output so far. If so, we will
need to restore the default color later. If not, we will need to
call prep_non_filename_text before using color for the first time. */
static bool used_color = false;
enum when_type
{
when_never, /* 0: default or --color=never */
when_always, /* 1: --color=always */
when_if_tty /* 2: --color=tty */
};
enum Dereference_symlink
{
DEREF_UNDEFINED = 1,
DEREF_NEVER,
DEREF_COMMAND_LINE_ARGUMENTS, /* -H */
DEREF_COMMAND_LINE_SYMLINK_TO_DIR, /* the default, in certain cases */
DEREF_ALWAYS /* -L */
};
enum indicator_no
{
C_LEFT, C_RIGHT, C_END, C_RESET, C_NORM, C_FILE, C_DIR, C_LINK,
C_FIFO, C_SOCK,
C_BLK, C_CHR, C_MISSING, C_ORPHAN, C_EXEC, C_DOOR, C_SETUID, C_SETGID,
C_STICKY, C_OTHER_WRITABLE, C_STICKY_OTHER_WRITABLE, C_CAP, C_MULTIHARDLINK,
C_CLR_TO_EOL
};
static const char *const indicator_name[]=
{
"lc", "rc", "ec", "rs", "no", "fi", "di", "ln", "pi", "so",
"bd", "cd", "mi", "or", "ex", "do", "su", "sg", "st",
"ow", "tw", "ca", "mh", "cl", NULL
};
struct color_ext_type
{
struct bin_str ext; /* The extension we're looking for */
struct bin_str seq; /* The sequence to output when we do */
struct color_ext_type *next; /* Next in list */
};
static struct bin_str color_indicator[] =
{
{ LEN_STR_PAIR ("\033[") }, /* lc: Left of color sequence */
{ LEN_STR_PAIR ("m") }, /* rc: Right of color sequence */
{ 0, NULL }, /* ec: End color (replaces lc+rs+rc) */
{ LEN_STR_PAIR ("0") }, /* rs: Reset to ordinary colors */
{ 0, NULL }, /* no: Normal */
{ 0, NULL }, /* fi: File: default */
{ LEN_STR_PAIR ("01;34") }, /* di: Directory: bright blue */
{ LEN_STR_PAIR ("01;36") }, /* ln: Symlink: bright cyan */
{ LEN_STR_PAIR ("33") }, /* pi: Pipe: yellow/brown */
{ LEN_STR_PAIR ("01;35") }, /* so: Socket: bright magenta */
{ LEN_STR_PAIR ("01;33") }, /* bd: Block device: bright yellow */
{ LEN_STR_PAIR ("01;33") }, /* cd: Char device: bright yellow */
{ 0, NULL }, /* mi: Missing file: undefined */
{ 0, NULL }, /* or: Orphaned symlink: undefined */
{ LEN_STR_PAIR ("01;32") }, /* ex: Executable: bright green */
{ LEN_STR_PAIR ("01;35") }, /* do: Door: bright magenta */
{ LEN_STR_PAIR ("37;41") }, /* su: setuid: white on red */
{ LEN_STR_PAIR ("30;43") }, /* sg: setgid: black on yellow */
{ LEN_STR_PAIR ("37;44") }, /* st: sticky: black on blue */
{ LEN_STR_PAIR ("34;42") }, /* ow: other-writable: blue on green */
{ LEN_STR_PAIR ("30;42") }, /* tw: ow w/ sticky: black on green */
{ LEN_STR_PAIR ("30;41") }, /* ca: black on red */
{ 0, NULL }, /* mh: disabled by default */
{ LEN_STR_PAIR ("\033[K") }, /* cl: clear to end of line */
};
/* FIXME: comment */
static struct color_ext_type *color_ext_list = NULL;
/* Buffer for color sequences */
static char *color_buf;
/* True means to check for orphaned symbolic link, for displaying
colors, or to group symlink to directories with other dirs. */
static bool check_symlink_mode;
/* True means mention the inode number of each file. -i */
static bool print_inode;
/* What to do with symbolic links. Affected by -d, -F, -H, -l (and
other options that imply -l), and -L. */
static enum Dereference_symlink dereference;
/* True means when a directory is found, display info on its
contents. -R */
static bool recursive;
/* True means when an argument is a directory name, display info
on it itself. -d */
static bool immediate_dirs;
/* True means that directories are grouped before files. */
static bool directories_first;
/* Which files to ignore. */
static enum
{
/* Ignore files whose names start with '.', and files specified by
--hide and --ignore. */
IGNORE_DEFAULT,
/* Ignore '.', '..', and files specified by --ignore. */
IGNORE_DOT_AND_DOTDOT,
/* Ignore only files specified by --ignore. */
IGNORE_MINIMAL
} ignore_mode;
/* A linked list of shell-style globbing patterns. If a non-argument
file name matches any of these patterns, it is ignored.
Controlled by -I. Multiple -I options accumulate.
The -B option adds '*~' and '.*~' to this list. */
struct ignore_pattern
{
const char *pattern;
struct ignore_pattern *next;
};
static struct ignore_pattern *ignore_patterns;
/* Similar to IGNORE_PATTERNS, except that -a or -A causes this
variable itself to be ignored. */
static struct ignore_pattern *hide_patterns;
/* True means output nongraphic chars in file names as '?'.
(-q, --hide-control-chars)
qmark_funny_chars and the quoting style (-Q, --quoting-style=WORD) are
independent. The algorithm is: first, obey the quoting style to get a
string representing the file name; then, if qmark_funny_chars is set,
replace all nonprintable chars in that string with '?'. It's necessary
to replace nonprintable chars even in quoted strings, because we don't
want to mess up the terminal if control chars get sent to it, and some
quoting methods pass through control chars as-is. */
static bool qmark_funny_chars;
/* Quoting options for file and dir name output. */
static struct quoting_options *filename_quoting_options;
static struct quoting_options *dirname_quoting_options;
/* The number of chars per hardware tab stop. Setting this to zero
inhibits the use of TAB characters for separating columns. -T */
static size_t tabsize;
/* True means print each directory name before listing it. */
static bool print_dir_name;
/* The line length to use for breaking lines in many-per-line format.
Can be set with -w. */
static size_t line_length;
/* The local time zone rules, as per the TZ environment variable. */
static timezone_t localtz;
/* If true, the file listing format requires that stat be called on
each file. */
static bool format_needs_stat;
/* Similar to 'format_needs_stat', but set if only the file type is
needed. */
static bool format_needs_type;
/* An arbitrary limit on the number of bytes in a printed timestamp.
This is set to a relatively small value to avoid the need to worry
about denial-of-service attacks on servers that run "ls" on behalf
of remote clients. 1000 bytes should be enough for any practical
timestamp format. */
enum { TIME_STAMP_LEN_MAXIMUM = MAX (1000, INT_STRLEN_BOUND (time_t)) };
/* strftime formats for non-recent and recent files, respectively, in
-l output. */
static char const *long_time_format[2] =
{
/* strftime format for non-recent files (older than 6 months), in
-l output. This should contain the year, month and day (at
least), in an order that is understood by people in your
locale's territory. Please try to keep the number of used
screen columns small, because many people work in windows with
only 80 columns. But make this as wide as the other string
below, for recent files. */
/* TRANSLATORS: ls output needs to be aligned for ease of reading,
so be wary of using variable width fields from the locale.
Note %b is handled specially by ls and aligned correctly.
Note also that specifying a width as in %5b is erroneous as strftime
will count bytes rather than characters in multibyte locales. */
N_("%b %e %Y"),
/* strftime format for recent files (younger than 6 months), in -l
output. This should contain the month, day and time (at
least), in an order that is understood by people in your
locale's territory. Please try to keep the number of used
screen columns small, because many people work in windows with
only 80 columns. But make this as wide as the other string
above, for non-recent files. */
/* TRANSLATORS: ls output needs to be aligned for ease of reading,
so be wary of using variable width fields from the locale.
Note %b is handled specially by ls and aligned correctly.
Note also that specifying a width as in %5b is erroneous as strftime
will count bytes rather than characters in multibyte locales. */
N_("%b %e %H:%M")
};
/* The set of signals that are caught. */
static sigset_t caught_signals;
/* If nonzero, the value of the pending fatal signal. */
static sig_atomic_t volatile interrupt_signal;
/* A count of the number of pending stop signals that have been received. */
static sig_atomic_t volatile stop_signal_count;
/* Desired exit status. */
static int exit_status;
/* Exit statuses. */
enum
{
/* "ls" had a minor problem. E.g., while processing a directory,
ls obtained the name of an entry via readdir, yet was later
unable to stat that name. This happens when listing a directory
in which entries are actively being removed or renamed. */
LS_MINOR_PROBLEM = 1,
/* "ls" had more serious trouble (e.g., memory exhausted, invalid
option or failure to stat a command line argument. */
LS_FAILURE = 2
};
/* For long options that have no equivalent short option, use a
non-character as a pseudo short option, starting with CHAR_MAX + 1. */
enum
{
AUTHOR_OPTION = CHAR_MAX + 1,
BLOCK_SIZE_OPTION,
COLOR_OPTION,
DEREFERENCE_COMMAND_LINE_SYMLINK_TO_DIR_OPTION,
FILE_TYPE_INDICATOR_OPTION,
FORMAT_OPTION,
FULL_TIME_OPTION,
GROUP_DIRECTORIES_FIRST_OPTION,
HIDE_OPTION,
HYPERLINK_OPTION,
INDICATOR_STYLE_OPTION,
QUOTING_STYLE_OPTION,
SHOW_CONTROL_CHARS_OPTION,
SI_OPTION,
SORT_OPTION,
TIME_OPTION,
TIME_STYLE_OPTION
};
static struct option const long_options[] =
{
{"all", no_argument, NULL, 'a'},
{"escape", no_argument, NULL, 'b'},
{"directory", no_argument, NULL, 'd'},
{"dired", no_argument, NULL, 'D'},
{"full-time", no_argument, NULL, FULL_TIME_OPTION},
{"group-directories-first", no_argument, NULL,
GROUP_DIRECTORIES_FIRST_OPTION},
{"human-readable", no_argument, NULL, 'h'},
{"inode", no_argument, NULL, 'i'},
{"kibibytes", no_argument, NULL, 'k'},
{"numeric-uid-gid", no_argument, NULL, 'n'},
{"no-group", no_argument, NULL, 'G'},
{"hide-control-chars", no_argument, NULL, 'q'},
{"reverse", no_argument, NULL, 'r'},
{"size", no_argument, NULL, 's'},
{"width", required_argument, NULL, 'w'},
{"almost-all", no_argument, NULL, 'A'},
{"ignore-backups", no_argument, NULL, 'B'},
{"classify", no_argument, NULL, 'F'},
{"file-type", no_argument, NULL, FILE_TYPE_INDICATOR_OPTION},
{"si", no_argument, NULL, SI_OPTION},
{"dereference-command-line", no_argument, NULL, 'H'},
{"dereference-command-line-symlink-to-dir", no_argument, NULL,
DEREFERENCE_COMMAND_LINE_SYMLINK_TO_DIR_OPTION},
{"hide", required_argument, NULL, HIDE_OPTION},
{"ignore", required_argument, NULL, 'I'},
{"indicator-style", required_argument, NULL, INDICATOR_STYLE_OPTION},
{"dereference", no_argument, NULL, 'L'},
{"literal", no_argument, NULL, 'N'},
{"quote-name", no_argument, NULL, 'Q'},
{"quoting-style", required_argument, NULL, QUOTING_STYLE_OPTION},
{"recursive", no_argument, NULL, 'R'},
{"format", required_argument, NULL, FORMAT_OPTION},
{"show-control-chars", no_argument, NULL, SHOW_CONTROL_CHARS_OPTION},
{"sort", required_argument, NULL, SORT_OPTION},
{"tabsize", required_argument, NULL, 'T'},
{"time", required_argument, NULL, TIME_OPTION},
{"time-style", required_argument, NULL, TIME_STYLE_OPTION},
{"color", optional_argument, NULL, COLOR_OPTION},
{"hyperlink", optional_argument, NULL, HYPERLINK_OPTION},
{"block-size", required_argument, NULL, BLOCK_SIZE_OPTION},
{"context", no_argument, 0, 'Z'},
{"author", no_argument, NULL, AUTHOR_OPTION},
{GETOPT_HELP_OPTION_DECL},
{GETOPT_VERSION_OPTION_DECL},
{NULL, 0, NULL, 0}
};
static char const *const format_args[] =
{
"verbose", "long", "commas", "horizontal", "across",
"vertical", "single-column", NULL
};
static enum format const format_types[] =
{
long_format, long_format, with_commas, horizontal, horizontal,
many_per_line, one_per_line
};
ARGMATCH_VERIFY (format_args, format_types);
static char const *const sort_args[] =
{
"none", "time", "size", "extension", "version", NULL
};
static enum sort_type const sort_types[] =
{
sort_none, sort_time, sort_size, sort_extension, sort_version
};
ARGMATCH_VERIFY (sort_args, sort_types);
static char const *const time_args[] =
{
"atime", "access", "use",
"ctime", "status",
"birth", "creation",
NULL
};
static enum time_type const time_types[] =
{
time_atime, time_atime, time_atime,
time_ctime, time_ctime,
time_btime, time_btime,
};
ARGMATCH_VERIFY (time_args, time_types);
static char const *const when_args[] =
{
/* force and none are for compatibility with another color-ls version */
"always", "yes", "force",
"never", "no", "none",
"auto", "tty", "if-tty", NULL
};
static enum when_type const when_types[] =
{
when_always, when_always, when_always,
when_never, when_never, when_never,
when_if_tty, when_if_tty, when_if_tty
};
ARGMATCH_VERIFY (when_args, when_types);
/* Information about filling a column. */
struct column_info
{
bool valid_len;
size_t line_len;
size_t *col_arr;
};
/* Array with information about column filledness. */
static struct column_info *column_info;
/* Maximum number of columns ever possible for this display. */
static size_t max_idx;
/* The minimum width of a column is 3: 1 character for the name and 2
for the separating white space. */
#define MIN_COLUMN_WIDTH 3
/* This zero-based index is used solely with the --dired option.
When that option is in effect, this counter is incremented for each
byte of output generated by this program so that the beginning
and ending indices (in that output) of every file name can be recorded
and later output themselves. */
static size_t dired_pos;
#define DIRED_PUTCHAR(c) do {putchar ((c)); ++dired_pos;} while (0)
/* Write S to STREAM and increment DIRED_POS by S_LEN. */
#define DIRED_FPUTS(s, stream, s_len) \
do {fputs (s, stream); dired_pos += s_len;} while (0)
/* Like DIRED_FPUTS, but for use when S is a literal string. */
#define DIRED_FPUTS_LITERAL(s, stream) \
do {fputs (s, stream); dired_pos += sizeof (s) - 1;} while (0)
#define DIRED_INDENT() \
do \
{ \
if (dired) \
DIRED_FPUTS_LITERAL (" ", stdout); \
} \
while (0)
/* With --dired, store pairs of beginning and ending indices of file names. */
static struct obstack dired_obstack;
/* With --dired, store pairs of beginning and ending indices of any
directory names that appear as headers (just before 'total' line)
for lists of directory entries. Such directory names are seen when
listing hierarchies using -R and when a directory is listed with at
least one other command line argument. */
static struct obstack subdired_obstack;
/* Save the current index on the specified obstack, OBS. */
#define PUSH_CURRENT_DIRED_POS(obs) \
do \