1124 lines
30 KiB
C
1124 lines
30 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* tiny-ls.c version 0.1.0: A minimalist 'ls'
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* Copyright (C) 1996 Brian Candler <B.Candler@pobox.com>
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*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*/
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/* [date unknown. Perhaps before year 2000]
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* To achieve a small memory footprint, this version of 'ls' doesn't do any
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* file sorting, and only has the most essential command line switches
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* (i.e., the ones I couldn't live without :-) All features which involve
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* linking in substantial chunks of libc can be disabled.
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*
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* Although I don't really want to add new features to this program to
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* keep it small, I *am* interested to receive bug fixes and ways to make
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* it more portable.
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*
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* KNOWN BUGS:
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* 1. hidden files can make column width too large
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*
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* NON-OPTIMAL BEHAVIOUR:
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* 1. autowidth reads directories twice
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* 2. if you do a short directory listing without filetype characters
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* appended, there's no need to stat each one
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* PORTABILITY:
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* 1. requires lstat (BSD) - how do you do it without?
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*
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* [2009-03]
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* ls sorts listing now, and supports almost all options.
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*/
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#include "libbb.h"
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#include "unicode.h"
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/* This is a NOEXEC applet. Be very careful! */
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#if ENABLE_FTPD
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/* ftpd uses ls, and without timestamps Mozilla won't understand
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* ftpd's LIST output.
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*/
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# undef CONFIG_FEATURE_LS_TIMESTAMPS
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# undef ENABLE_FEATURE_LS_TIMESTAMPS
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# undef IF_FEATURE_LS_TIMESTAMPS
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# undef IF_NOT_FEATURE_LS_TIMESTAMPS
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# define CONFIG_FEATURE_LS_TIMESTAMPS 1
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# define ENABLE_FEATURE_LS_TIMESTAMPS 1
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# define IF_FEATURE_LS_TIMESTAMPS(...) __VA_ARGS__
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# define IF_NOT_FEATURE_LS_TIMESTAMPS(...)
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#endif
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enum {
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TERMINAL_WIDTH = 80, /* use 79 if terminal has linefold bug */
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COLUMN_GAP = 2, /* includes the file type char */
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/* what is the overall style of the listing */
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STYLE_COLUMNS = 1 << 21, /* fill columns */
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STYLE_LONG = 2 << 21, /* one record per line, extended info */
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STYLE_SINGLE = 3 << 21, /* one record per line */
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STYLE_MASK = STYLE_SINGLE,
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/* 51306 lrwxrwxrwx 1 root root 2 May 11 01:43 /bin/view -> vi* */
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/* what file information will be listed */
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LIST_INO = 1 << 0,
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LIST_BLOCKS = 1 << 1,
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LIST_MODEBITS = 1 << 2,
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LIST_NLINKS = 1 << 3,
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LIST_ID_NAME = 1 << 4,
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LIST_ID_NUMERIC = 1 << 5,
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LIST_CONTEXT = 1 << 6,
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LIST_SIZE = 1 << 7,
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//LIST_DEV = 1 << 8, - unused, synonym to LIST_SIZE
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LIST_DATE_TIME = 1 << 9,
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LIST_FULLTIME = 1 << 10,
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LIST_FILENAME = 1 << 11,
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LIST_SYMLINK = 1 << 12,
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LIST_FILETYPE = 1 << 13,
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LIST_EXEC = 1 << 14,
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LIST_MASK = (LIST_EXEC << 1) - 1,
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/* what files will be displayed */
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DISP_DIRNAME = 1 << 15, /* 2 or more items? label directories */
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DISP_HIDDEN = 1 << 16, /* show filenames starting with . */
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DISP_DOT = 1 << 17, /* show . and .. */
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DISP_NOLIST = 1 << 18, /* show directory as itself, not contents */
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DISP_RECURSIVE = 1 << 19, /* show directory and everything below it */
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DISP_ROWS = 1 << 20, /* print across rows */
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DISP_MASK = ((DISP_ROWS << 1) - 1) & ~(DISP_DIRNAME - 1),
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/* how will the files be sorted (CONFIG_FEATURE_LS_SORTFILES) */
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SORT_FORWARD = 0, /* sort in reverse order */
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SORT_REVERSE = 1 << 27, /* sort in reverse order */
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SORT_NAME = 0, /* sort by file name */
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SORT_SIZE = 1 << 28, /* sort by file size */
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SORT_ATIME = 2 << 28, /* sort by last access time */
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SORT_CTIME = 3 << 28, /* sort by last change time */
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SORT_MTIME = 4 << 28, /* sort by last modification time */
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SORT_VERSION = 5 << 28, /* sort by version */
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SORT_EXT = 6 << 28, /* sort by file name extension */
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SORT_DIR = 7 << 28, /* sort by file or directory */
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SORT_MASK = (7 << 28) * ENABLE_FEATURE_LS_SORTFILES,
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/* which of the three times will be used */
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TIME_CHANGE = (1 << 23) * ENABLE_FEATURE_LS_TIMESTAMPS,
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TIME_ACCESS = (1 << 24) * ENABLE_FEATURE_LS_TIMESTAMPS,
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TIME_MASK = (3 << 23) * ENABLE_FEATURE_LS_TIMESTAMPS,
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FOLLOW_LINKS = (1 << 25) * ENABLE_FEATURE_LS_FOLLOWLINKS,
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LS_DISP_HR = (1 << 26) * ENABLE_FEATURE_HUMAN_READABLE,
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LIST_SHORT = LIST_FILENAME,
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LIST_LONG = LIST_MODEBITS | LIST_NLINKS | LIST_ID_NAME | LIST_SIZE | \
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LIST_DATE_TIME | LIST_FILENAME | LIST_SYMLINK,
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SPLIT_DIR = 1,
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SPLIT_FILE = 0,
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SPLIT_SUBDIR = 2,
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};
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/* "[-]Cadil1", POSIX mandated options, busybox always supports */
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/* "[-]gnsx", POSIX non-mandated options, busybox always supports */
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/* "[-]Q" GNU option? busybox always supports */
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/* "[-]Ak" GNU options, busybox always supports */
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/* "[-]FLRctur", POSIX mandated options, busybox optionally supports */
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/* "[-]p", POSIX non-mandated options, busybox optionally supports */
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/* "[-]SXvThw", GNU options, busybox optionally supports */
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/* "[-]K", SELinux mandated options, busybox optionally supports */
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/* "[-]e", I think we made this one up */
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static const char ls_options[] ALIGN1 =
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"Cadil1gnsxQAk" /* 13 opts, total 13 */
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IF_FEATURE_LS_TIMESTAMPS("cetu") /* 4, 17 */
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IF_FEATURE_LS_SORTFILES("SXrv") /* 4, 21 */
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IF_FEATURE_LS_FILETYPES("Fp") /* 2, 23 */
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IF_FEATURE_LS_FOLLOWLINKS("L") /* 1, 24 */
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IF_FEATURE_LS_RECURSIVE("R") /* 1, 25 */
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IF_FEATURE_HUMAN_READABLE("h") /* 1, 26 */
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IF_SELINUX("KZ") /* 2, 28 */
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IF_FEATURE_AUTOWIDTH("T:w:") /* 2, 30 */
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;
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enum {
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//OPT_C = (1 << 0),
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//OPT_a = (1 << 1),
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//OPT_d = (1 << 2),
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//OPT_i = (1 << 3),
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//OPT_l = (1 << 4),
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//OPT_1 = (1 << 5),
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OPT_g = (1 << 6),
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//OPT_n = (1 << 7),
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//OPT_s = (1 << 8),
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//OPT_x = (1 << 9),
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OPT_Q = (1 << 10),
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//OPT_A = (1 << 11),
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//OPT_k = (1 << 12),
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OPTBIT_color = 13
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+ 4 * ENABLE_FEATURE_LS_TIMESTAMPS
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+ 4 * ENABLE_FEATURE_LS_SORTFILES
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+ 2 * ENABLE_FEATURE_LS_FILETYPES
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+ 1 * ENABLE_FEATURE_LS_FOLLOWLINKS
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+ 1 * ENABLE_FEATURE_LS_RECURSIVE
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+ 1 * ENABLE_FEATURE_HUMAN_READABLE
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+ 2 * ENABLE_SELINUX
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+ 2 * ENABLE_FEATURE_AUTOWIDTH,
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OPT_color = 1 << OPTBIT_color,
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};
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enum {
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LIST_MASK_TRIGGER = 0,
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STYLE_MASK_TRIGGER = STYLE_MASK,
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DISP_MASK_TRIGGER = DISP_ROWS,
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SORT_MASK_TRIGGER = SORT_MASK,
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};
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/* TODO: simple toggles may be stored as OPT_xxx bits instead */
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static const unsigned opt_flags[] = {
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LIST_SHORT | STYLE_COLUMNS, /* C */
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DISP_HIDDEN | DISP_DOT, /* a */
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DISP_NOLIST, /* d */
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LIST_INO, /* i */
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LIST_LONG | STYLE_LONG, /* l - remember LS_DISP_HR in mask! */
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LIST_SHORT | STYLE_SINGLE, /* 1 */
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0, /* g (don't show group) - handled via OPT_g */
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LIST_ID_NUMERIC, /* n */
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LIST_BLOCKS, /* s */
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DISP_ROWS, /* x */
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0, /* Q (quote filename) - handled via OPT_Q */
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DISP_HIDDEN, /* A */
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ENABLE_SELINUX * LIST_CONTEXT, /* k (ignored if !SELINUX) */
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#if ENABLE_FEATURE_LS_TIMESTAMPS
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TIME_CHANGE | (ENABLE_FEATURE_LS_SORTFILES * SORT_CTIME), /* c */
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LIST_FULLTIME, /* e */
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ENABLE_FEATURE_LS_SORTFILES * SORT_MTIME, /* t */
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TIME_ACCESS | (ENABLE_FEATURE_LS_SORTFILES * SORT_ATIME), /* u */
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#endif
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#if ENABLE_FEATURE_LS_SORTFILES
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SORT_SIZE, /* S */
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SORT_EXT, /* X */
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SORT_REVERSE, /* r */
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SORT_VERSION, /* v */
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#endif
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#if ENABLE_FEATURE_LS_FILETYPES
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LIST_FILETYPE | LIST_EXEC, /* F */
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LIST_FILETYPE, /* p */
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#endif
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#if ENABLE_FEATURE_LS_FOLLOWLINKS
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FOLLOW_LINKS, /* L */
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#endif
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#if ENABLE_FEATURE_LS_RECURSIVE
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DISP_RECURSIVE, /* R */
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#endif
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#if ENABLE_FEATURE_HUMAN_READABLE
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LS_DISP_HR, /* h */
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#endif
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#if ENABLE_SELINUX
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LIST_MODEBITS|LIST_NLINKS|LIST_CONTEXT|LIST_SIZE|LIST_DATE_TIME, /* K */
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#endif
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#if ENABLE_SELINUX
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LIST_MODEBITS|LIST_ID_NAME|LIST_CONTEXT, /* Z */
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#endif
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(1U<<31)
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/* options after Z are not processed through opt_flags:
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* T, w - ignored
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*/
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};
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/*
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* a directory entry and its stat info are stored here
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*/
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struct dnode {
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const char *name; /* the dir entry name */
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const char *fullname; /* the dir entry name */
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struct dnode *next; /* point at the next node */
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smallint fname_allocated;
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struct stat dstat; /* the file stat info */
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IF_SELINUX(security_context_t sid;)
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};
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struct globals {
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#if ENABLE_FEATURE_LS_COLOR
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smallint show_color;
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#endif
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smallint exit_code;
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unsigned all_fmt;
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#if ENABLE_FEATURE_AUTOWIDTH
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unsigned tabstops; // = COLUMN_GAP;
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unsigned terminal_width; // = TERMINAL_WIDTH;
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#endif
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#if ENABLE_FEATURE_LS_TIMESTAMPS
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/* Do time() just once. Saves one syscall per file for "ls -l" */
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time_t current_time_t;
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#endif
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} FIX_ALIASING;
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#define G (*(struct globals*)&bb_common_bufsiz1)
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#if ENABLE_FEATURE_LS_COLOR
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# define show_color (G.show_color )
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#else
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enum { show_color = 0 };
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#endif
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#define exit_code (G.exit_code )
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#define all_fmt (G.all_fmt )
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#if ENABLE_FEATURE_AUTOWIDTH
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# define tabstops (G.tabstops )
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# define terminal_width (G.terminal_width)
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#else
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enum {
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tabstops = COLUMN_GAP,
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terminal_width = TERMINAL_WIDTH,
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};
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#endif
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#define current_time_t (G.current_time_t)
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#define INIT_G() do { \
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/* we have to zero it out because of NOEXEC */ \
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memset(&G, 0, sizeof(G)); \
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IF_FEATURE_AUTOWIDTH(tabstops = COLUMN_GAP;) \
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IF_FEATURE_AUTOWIDTH(terminal_width = TERMINAL_WIDTH;) \
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IF_FEATURE_LS_TIMESTAMPS(time(¤t_time_t);) \
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} while (0)
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static struct dnode *my_stat(const char *fullname, const char *name, int force_follow)
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{
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struct stat dstat;
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struct dnode *cur;
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IF_SELINUX(security_context_t sid = NULL;)
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if ((all_fmt & FOLLOW_LINKS) || force_follow) {
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#if ENABLE_SELINUX
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if (is_selinux_enabled()) {
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getfilecon(fullname, &sid);
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}
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#endif
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if (stat(fullname, &dstat)) {
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bb_simple_perror_msg(fullname);
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exit_code = EXIT_FAILURE;
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return 0;
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}
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} else {
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#if ENABLE_SELINUX
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if (is_selinux_enabled()) {
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lgetfilecon(fullname, &sid);
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}
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#endif
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if (lstat(fullname, &dstat)) {
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bb_simple_perror_msg(fullname);
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exit_code = EXIT_FAILURE;
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return 0;
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}
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}
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cur = xmalloc(sizeof(*cur));
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cur->fullname = fullname;
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cur->name = name;
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cur->dstat = dstat;
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IF_SELINUX(cur->sid = sid;)
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return cur;
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}
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/* FYI type values: 1:fifo 2:char 4:dir 6:blk 8:file 10:link 12:socket
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* (various wacky OSes: 13:Sun door 14:BSD whiteout 5:XENIX named file
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* 3/7:multiplexed char/block device)
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* and we use 0 for unknown and 15 for executables (see below) */
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#define TYPEINDEX(mode) (((mode) >> 12) & 0x0f)
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#define TYPECHAR(mode) ("0pcCd?bB-?l?s???" [TYPEINDEX(mode)])
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#define APPCHAR(mode) ("\0|\0\0/\0\0\0\0\0@\0=\0\0\0" [TYPEINDEX(mode)])
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/* 036 black foreground 050 black background
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037 red foreground 051 red background
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040 green foreground 052 green background
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041 brown foreground 053 brown background
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042 blue foreground 054 blue background
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043 magenta (purple) foreground 055 magenta background
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044 cyan (light blue) foreground 056 cyan background
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045 gray foreground 057 white background
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*/
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#define COLOR(mode) ( \
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/*un fi chr dir blk file link sock exe */ \
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"\037\043\043\045\042\045\043\043\000\045\044\045\043\045\045\040" \
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[TYPEINDEX(mode)])
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/* Select normal (0) [actually "reset all"] or bold (1)
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* (other attributes are 2:dim 4:underline 5:blink 7:reverse,
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* let's use 7 for "impossible" types, just for fun)
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* Note: coreutils 6.9 uses inverted red for setuid binaries.
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*/
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#define ATTR(mode) ( \
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/*un fi chr dir blk file link sock exe */ \
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"\01\00\01\07\01\07\01\07\00\07\01\07\01\07\07\01" \
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[TYPEINDEX(mode)])
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#if ENABLE_FEATURE_LS_COLOR
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/* mode of zero is interpreted as "unknown" (stat failed) */
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static char fgcolor(mode_t mode)
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{
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if (S_ISREG(mode) && (mode & (S_IXUSR | S_IXGRP | S_IXOTH)))
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return COLOR(0xF000); /* File is executable ... */
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return COLOR(mode);
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}
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static char bold(mode_t mode)
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{
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if (S_ISREG(mode) && (mode & (S_IXUSR | S_IXGRP | S_IXOTH)))
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return ATTR(0xF000); /* File is executable ... */
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return ATTR(mode);
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}
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#endif
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#if ENABLE_FEATURE_LS_FILETYPES || ENABLE_FEATURE_LS_COLOR
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static char append_char(mode_t mode)
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{
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if (!(all_fmt & LIST_FILETYPE))
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return '\0';
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if (S_ISDIR(mode))
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return '/';
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if (!(all_fmt & LIST_EXEC))
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return '\0';
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if (S_ISREG(mode) && (mode & (S_IXUSR | S_IXGRP | S_IXOTH)))
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return '*';
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return APPCHAR(mode);
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}
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#endif
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static unsigned count_dirs(struct dnode **dn, int which)
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{
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unsigned dirs, all;
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if (!dn)
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return 0;
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dirs = all = 0;
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for (; *dn; dn++) {
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const char *name;
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all++;
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if (!S_ISDIR((*dn)->dstat.st_mode))
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continue;
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name = (*dn)->name;
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if (which != SPLIT_SUBDIR /* if not requested to skip . / .. */
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/* or if it's not . or .. */
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|| name[0] != '.' || (name[1] && (name[1] != '.' || name[2]))
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) {
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dirs++;
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}
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}
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return which != SPLIT_FILE ? dirs : all - dirs;
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}
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/* get memory to hold an array of pointers */
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static struct dnode **dnalloc(unsigned num)
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{
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if (num < 1)
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return NULL;
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num++; /* so that we have terminating NULL */
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return xzalloc(num * sizeof(struct dnode *));
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}
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#if ENABLE_FEATURE_LS_RECURSIVE
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static void dfree(struct dnode **dnp)
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{
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unsigned i;
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if (dnp == NULL)
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return;
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for (i = 0; dnp[i]; i++) {
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struct dnode *cur = dnp[i];
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if (cur->fname_allocated)
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free((char*)cur->fullname);
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free(cur);
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}
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free(dnp);
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}
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#else
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#define dfree(...) ((void)0)
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#endif
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/* Returns NULL-terminated malloced vector of pointers (or NULL) */
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static struct dnode **splitdnarray(struct dnode **dn, int which)
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{
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unsigned dncnt, d;
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struct dnode **dnp;
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if (dn == NULL)
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return NULL;
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/* count how many dirs or files there are */
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dncnt = count_dirs(dn, which);
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/* allocate a file array and a dir array */
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dnp = dnalloc(dncnt);
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/* copy the entrys into the file or dir array */
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for (d = 0; *dn; dn++) {
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if (S_ISDIR((*dn)->dstat.st_mode)) {
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const char *name;
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if (!(which & (SPLIT_DIR|SPLIT_SUBDIR)))
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continue;
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name = (*dn)->name;
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if ((which & SPLIT_DIR)
|
|
|| name[0]!='.' || (name[1] && (name[1]!='.' || name[2]))
|
|
) {
|
|
dnp[d++] = *dn;
|
|
}
|
|
} else if (!(which & (SPLIT_DIR|SPLIT_SUBDIR))) {
|
|
dnp[d++] = *dn;
|
|
}
|
|
}
|
|
return dnp;
|
|
}
|
|
|
|
#if ENABLE_FEATURE_LS_SORTFILES
|
|
static int sortcmp(const void *a, const void *b)
|
|
{
|
|
struct dnode *d1 = *(struct dnode **)a;
|
|
struct dnode *d2 = *(struct dnode **)b;
|
|
unsigned sort_opts = all_fmt & SORT_MASK;
|
|
off_t dif;
|
|
|
|
dif = 0; /* assume SORT_NAME */
|
|
// TODO: use pre-initialized function pointer
|
|
// instead of branch forest
|
|
if (sort_opts == SORT_SIZE) {
|
|
dif = (d2->dstat.st_size - d1->dstat.st_size);
|
|
} else if (sort_opts == SORT_ATIME) {
|
|
dif = (d2->dstat.st_atime - d1->dstat.st_atime);
|
|
} else if (sort_opts == SORT_CTIME) {
|
|
dif = (d2->dstat.st_ctime - d1->dstat.st_ctime);
|
|
} else if (sort_opts == SORT_MTIME) {
|
|
dif = (d2->dstat.st_mtime - d1->dstat.st_mtime);
|
|
} else if (sort_opts == SORT_DIR) {
|
|
dif = S_ISDIR(d2->dstat.st_mode) - S_ISDIR(d1->dstat.st_mode);
|
|
/* } else if (sort_opts == SORT_VERSION) { */
|
|
/* } else if (sort_opts == SORT_EXT) { */
|
|
}
|
|
if (dif == 0) {
|
|
/* sort by name, or tie_breaker for other sorts */
|
|
if (ENABLE_LOCALE_SUPPORT)
|
|
dif = strcoll(d1->name, d2->name);
|
|
else
|
|
dif = strcmp(d1->name, d2->name);
|
|
}
|
|
|
|
/* Make dif fit into an int */
|
|
if (sizeof(dif) > sizeof(int)) {
|
|
enum { BITS_TO_SHIFT = 8 * (sizeof(dif) - sizeof(int)) };
|
|
/* shift leaving only "int" worth of bits */
|
|
if (dif != 0) {
|
|
dif = 1 | (int)((uoff_t)dif >> BITS_TO_SHIFT);
|
|
}
|
|
}
|
|
|
|
return (all_fmt & SORT_REVERSE) ? -(int)dif : (int)dif;
|
|
}
|
|
|
|
static void dnsort(struct dnode **dn, int size)
|
|
{
|
|
qsort(dn, size, sizeof(*dn), sortcmp);
|
|
}
|
|
#else
|
|
#define dnsort(dn, size) ((void)0)
|
|
#endif
|
|
|
|
|
|
static unsigned calc_name_len(const char *name)
|
|
{
|
|
unsigned len;
|
|
uni_stat_t uni_stat;
|
|
|
|
// TODO: quote tab as \t, etc, if -Q
|
|
name = printable_string(&uni_stat, name);
|
|
|
|
if (!(option_mask32 & OPT_Q)) {
|
|
return uni_stat.unicode_width;
|
|
}
|
|
|
|
len = 2 + uni_stat.unicode_width;
|
|
while (*name) {
|
|
if (*name == '"' || *name == '\\') {
|
|
len++;
|
|
}
|
|
name++;
|
|
}
|
|
return len;
|
|
}
|
|
|
|
|
|
/* Return the number of used columns.
|
|
* Note that only STYLE_COLUMNS uses return value.
|
|
* STYLE_SINGLE and STYLE_LONG don't care.
|
|
* coreutils 7.2 also supports:
|
|
* ls -b (--escape) = octal escapes (although it doesn't look like working)
|
|
* ls -N (--literal) = not escape at all
|
|
*/
|
|
static unsigned print_name(const char *name)
|
|
{
|
|
unsigned len;
|
|
uni_stat_t uni_stat;
|
|
|
|
// TODO: quote tab as \t, etc, if -Q
|
|
name = printable_string(&uni_stat, name);
|
|
|
|
if (!(option_mask32 & OPT_Q)) {
|
|
fputs(name, stdout);
|
|
return uni_stat.unicode_width;
|
|
}
|
|
|
|
len = 2 + uni_stat.unicode_width;
|
|
putchar('"');
|
|
while (*name) {
|
|
if (*name == '"' || *name == '\\') {
|
|
putchar('\\');
|
|
len++;
|
|
}
|
|
putchar(*name++);
|
|
}
|
|
putchar('"');
|
|
return len;
|
|
}
|
|
|
|
/* Return the number of used columns.
|
|
* Note that only STYLE_COLUMNS uses return value,
|
|
* STYLE_SINGLE and STYLE_LONG don't care.
|
|
*/
|
|
static NOINLINE unsigned list_single(const struct dnode *dn)
|
|
{
|
|
unsigned column = 0;
|
|
char *lpath = lpath; /* for compiler */
|
|
#if ENABLE_FEATURE_LS_FILETYPES || ENABLE_FEATURE_LS_COLOR
|
|
struct stat info;
|
|
char append;
|
|
#endif
|
|
|
|
/* Never happens:
|
|
if (dn->fullname == NULL)
|
|
return 0;
|
|
*/
|
|
|
|
#if ENABLE_FEATURE_LS_FILETYPES
|
|
append = append_char(dn->dstat.st_mode);
|
|
#endif
|
|
|
|
/* Do readlink early, so that if it fails, error message
|
|
* does not appear *inside* the "ls -l" line */
|
|
if (all_fmt & LIST_SYMLINK)
|
|
if (S_ISLNK(dn->dstat.st_mode))
|
|
lpath = xmalloc_readlink_or_warn(dn->fullname);
|
|
|
|
if (all_fmt & LIST_INO)
|
|
column += printf("%7llu ", (long long) dn->dstat.st_ino);
|
|
if (all_fmt & LIST_BLOCKS)
|
|
column += printf("%4"OFF_FMT"u ", (off_t) (dn->dstat.st_blocks >> 1));
|
|
if (all_fmt & LIST_MODEBITS)
|
|
column += printf("%-10s ", (char *) bb_mode_string(dn->dstat.st_mode));
|
|
if (all_fmt & LIST_NLINKS)
|
|
column += printf("%4lu ", (long) dn->dstat.st_nlink);
|
|
#if ENABLE_FEATURE_LS_USERNAME
|
|
if (all_fmt & LIST_ID_NAME) {
|
|
if (option_mask32 & OPT_g) {
|
|
column += printf("%-8.8s ",
|
|
get_cached_username(dn->dstat.st_uid));
|
|
} else {
|
|
column += printf("%-8.8s %-8.8s ",
|
|
get_cached_username(dn->dstat.st_uid),
|
|
get_cached_groupname(dn->dstat.st_gid));
|
|
}
|
|
}
|
|
#endif
|
|
if (all_fmt & LIST_ID_NUMERIC) {
|
|
if (option_mask32 & OPT_g)
|
|
column += printf("%-8u ", (int) dn->dstat.st_uid);
|
|
else
|
|
column += printf("%-8u %-8u ",
|
|
(int) dn->dstat.st_uid,
|
|
(int) dn->dstat.st_gid);
|
|
}
|
|
if (all_fmt & (LIST_SIZE /*|LIST_DEV*/ )) {
|
|
if (S_ISBLK(dn->dstat.st_mode) || S_ISCHR(dn->dstat.st_mode)) {
|
|
column += printf("%4u, %3u ",
|
|
(int) major(dn->dstat.st_rdev),
|
|
(int) minor(dn->dstat.st_rdev));
|
|
} else {
|
|
if (all_fmt & LS_DISP_HR) {
|
|
column += printf("%"HUMAN_READABLE_MAX_WIDTH_STR"s ",
|
|
/* print st_size, show one fractional, use suffixes */
|
|
make_human_readable_str(dn->dstat.st_size, 1, 0)
|
|
);
|
|
} else {
|
|
column += printf("%9"OFF_FMT"u ", (off_t) dn->dstat.st_size);
|
|
}
|
|
}
|
|
}
|
|
#if ENABLE_FEATURE_LS_TIMESTAMPS
|
|
if (all_fmt & (LIST_FULLTIME|LIST_DATE_TIME)) {
|
|
char *filetime;
|
|
time_t ttime = dn->dstat.st_mtime;
|
|
if (all_fmt & TIME_ACCESS)
|
|
ttime = dn->dstat.st_atime;
|
|
if (all_fmt & TIME_CHANGE)
|
|
ttime = dn->dstat.st_ctime;
|
|
filetime = ctime(&ttime);
|
|
/* filetime's format: "Wed Jun 30 21:49:08 1993\n" */
|
|
if (all_fmt & LIST_FULLTIME)
|
|
column += printf("%.24s ", filetime);
|
|
else { /* LIST_DATE_TIME */
|
|
/* current_time_t ~== time(NULL) */
|
|
time_t age = current_time_t - ttime;
|
|
printf("%.6s ", filetime + 4); /* "Jun 30" */
|
|
if (age < 3600L * 24 * 365 / 2 && age > -15 * 60) {
|
|
/* hh:mm if less than 6 months old */
|
|
printf("%.5s ", filetime + 11);
|
|
} else { /* year. buggy if year > 9999 ;) */
|
|
printf(" %.4s ", filetime + 20);
|
|
}
|
|
column += 13;
|
|
}
|
|
}
|
|
#endif
|
|
#if ENABLE_SELINUX
|
|
if (all_fmt & LIST_CONTEXT) {
|
|
column += printf("%-32s ", dn->sid ? dn->sid : "unknown");
|
|
freecon(dn->sid);
|
|
}
|
|
#endif
|
|
if (all_fmt & LIST_FILENAME) {
|
|
#if ENABLE_FEATURE_LS_COLOR
|
|
if (show_color) {
|
|
info.st_mode = 0; /* for fgcolor() */
|
|
lstat(dn->fullname, &info);
|
|
printf("\033[%u;%um", bold(info.st_mode),
|
|
fgcolor(info.st_mode));
|
|
}
|
|
#endif
|
|
column += print_name(dn->name);
|
|
if (show_color) {
|
|
printf("\033[0m");
|
|
}
|
|
}
|
|
if (all_fmt & LIST_SYMLINK) {
|
|
if (S_ISLNK(dn->dstat.st_mode) && lpath) {
|
|
printf(" -> ");
|
|
#if ENABLE_FEATURE_LS_FILETYPES || ENABLE_FEATURE_LS_COLOR
|
|
#if ENABLE_FEATURE_LS_COLOR
|
|
info.st_mode = 0; /* for fgcolor() */
|
|
#endif
|
|
if (stat(dn->fullname, &info) == 0) {
|
|
append = append_char(info.st_mode);
|
|
}
|
|
#endif
|
|
#if ENABLE_FEATURE_LS_COLOR
|
|
if (show_color) {
|
|
printf("\033[%u;%um", bold(info.st_mode),
|
|
fgcolor(info.st_mode));
|
|
}
|
|
#endif
|
|
column += print_name(lpath) + 4;
|
|
if (show_color) {
|
|
printf("\033[0m");
|
|
}
|
|
free(lpath);
|
|
}
|
|
}
|
|
#if ENABLE_FEATURE_LS_FILETYPES
|
|
if (all_fmt & LIST_FILETYPE) {
|
|
if (append) {
|
|
putchar(append);
|
|
column++;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
return column;
|
|
}
|
|
|
|
static void showfiles(struct dnode **dn, unsigned nfiles)
|
|
{
|
|
unsigned i, ncols, nrows, row, nc;
|
|
unsigned column = 0;
|
|
unsigned nexttab = 0;
|
|
unsigned column_width = 0; /* used only by STYLE_COLUMNS */
|
|
|
|
if (all_fmt & STYLE_LONG) { /* STYLE_LONG or STYLE_SINGLE */
|
|
ncols = 1;
|
|
} else {
|
|
/* find the longest file name, use that as the column width */
|
|
for (i = 0; dn[i]; i++) {
|
|
int len = calc_name_len(dn[i]->name);
|
|
if (column_width < len)
|
|
column_width = len;
|
|
}
|
|
column_width += tabstops +
|
|
IF_SELINUX( ((all_fmt & LIST_CONTEXT) ? 33 : 0) + )
|
|
((all_fmt & LIST_INO) ? 8 : 0) +
|
|
((all_fmt & LIST_BLOCKS) ? 5 : 0);
|
|
ncols = (int) (terminal_width / column_width);
|
|
}
|
|
|
|
if (ncols > 1) {
|
|
nrows = nfiles / ncols;
|
|
if (nrows * ncols < nfiles)
|
|
nrows++; /* round up fractionals */
|
|
} else {
|
|
nrows = nfiles;
|
|
ncols = 1;
|
|
}
|
|
|
|
for (row = 0; row < nrows; row++) {
|
|
for (nc = 0; nc < ncols; nc++) {
|
|
/* reach into the array based on the column and row */
|
|
if (all_fmt & DISP_ROWS)
|
|
i = (row * ncols) + nc; /* display across row */
|
|
else
|
|
i = (nc * nrows) + row; /* display by column */
|
|
if (i < nfiles) {
|
|
if (column > 0) {
|
|
nexttab -= column;
|
|
printf("%*s", nexttab, "");
|
|
column += nexttab;
|
|
}
|
|
nexttab = column + column_width;
|
|
column += list_single(dn[i]);
|
|
}
|
|
}
|
|
putchar('\n');
|
|
column = 0;
|
|
}
|
|
}
|
|
|
|
|
|
#if ENABLE_DESKTOP
|
|
/* http://www.opengroup.org/onlinepubs/9699919799/utilities/ls.html
|
|
* If any of the -l, -n, -s options is specified, each list
|
|
* of files within the directory shall be preceded by a
|
|
* status line indicating the number of file system blocks
|
|
* occupied by files in the directory in 512-byte units if
|
|
* the -k option is not specified, or 1024-byte units if the
|
|
* -k option is specified, rounded up to the next integral
|
|
* number of units.
|
|
*/
|
|
/* by Jorgen Overgaard (jorgen AT antistaten.se) */
|
|
static off_t calculate_blocks(struct dnode **dn)
|
|
{
|
|
uoff_t blocks = 1;
|
|
if (dn) {
|
|
while (*dn) {
|
|
/* st_blocks is in 512 byte blocks */
|
|
blocks += (*dn)->dstat.st_blocks;
|
|
dn++;
|
|
}
|
|
}
|
|
|
|
/* Even though standard says use 512 byte blocks, coreutils use 1k */
|
|
/* Actually, we round up by calculating (blocks + 1) / 2,
|
|
* "+ 1" was done when we initialized blocks to 1 */
|
|
return blocks >> 1;
|
|
}
|
|
#endif
|
|
|
|
|
|
static struct dnode **list_dir(const char *, unsigned *);
|
|
|
|
static void showdirs(struct dnode **dn, int first)
|
|
{
|
|
unsigned nfiles;
|
|
unsigned dndirs;
|
|
struct dnode **subdnp;
|
|
struct dnode **dnd;
|
|
|
|
/* Never happens:
|
|
if (dn == NULL || ndirs < 1) {
|
|
return;
|
|
}
|
|
*/
|
|
|
|
for (; *dn; dn++) {
|
|
if (all_fmt & (DISP_DIRNAME | DISP_RECURSIVE)) {
|
|
if (!first)
|
|
bb_putchar('\n');
|
|
first = 0;
|
|
printf("%s:\n", (*dn)->fullname);
|
|
}
|
|
subdnp = list_dir((*dn)->fullname, &nfiles);
|
|
#if ENABLE_DESKTOP
|
|
if ((all_fmt & STYLE_MASK) == STYLE_LONG)
|
|
printf("total %"OFF_FMT"u\n", calculate_blocks(subdnp));
|
|
#endif
|
|
if (nfiles > 0) {
|
|
/* list all files at this level */
|
|
dnsort(subdnp, nfiles);
|
|
showfiles(subdnp, nfiles);
|
|
if (ENABLE_FEATURE_LS_RECURSIVE
|
|
&& (all_fmt & DISP_RECURSIVE)
|
|
) {
|
|
/* recursive - list the sub-dirs */
|
|
dnd = splitdnarray(subdnp, SPLIT_SUBDIR);
|
|
dndirs = count_dirs(subdnp, SPLIT_SUBDIR);
|
|
if (dndirs > 0) {
|
|
dnsort(dnd, dndirs);
|
|
showdirs(dnd, 0);
|
|
/* free the array of dnode pointers to the dirs */
|
|
free(dnd);
|
|
}
|
|
}
|
|
/* free the dnodes and the fullname mem */
|
|
dfree(subdnp);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/* Returns NULL-terminated malloced vector of pointers (or NULL) */
|
|
static struct dnode **list_dir(const char *path, unsigned *nfiles_p)
|
|
{
|
|
struct dnode *dn, *cur, **dnp;
|
|
struct dirent *entry;
|
|
DIR *dir;
|
|
unsigned i, nfiles;
|
|
|
|
/* Never happens:
|
|
if (path == NULL)
|
|
return NULL;
|
|
*/
|
|
|
|
*nfiles_p = 0;
|
|
dir = warn_opendir(path);
|
|
if (dir == NULL) {
|
|
exit_code = EXIT_FAILURE;
|
|
return NULL; /* could not open the dir */
|
|
}
|
|
dn = NULL;
|
|
nfiles = 0;
|
|
while ((entry = readdir(dir)) != NULL) {
|
|
char *fullname;
|
|
|
|
/* are we going to list the file- it may be . or .. or a hidden file */
|
|
if (entry->d_name[0] == '.') {
|
|
if ((!entry->d_name[1] || (entry->d_name[1] == '.' && !entry->d_name[2]))
|
|
&& !(all_fmt & DISP_DOT)
|
|
) {
|
|
continue;
|
|
}
|
|
if (!(all_fmt & DISP_HIDDEN))
|
|
continue;
|
|
}
|
|
fullname = concat_path_file(path, entry->d_name);
|
|
cur = my_stat(fullname, bb_basename(fullname), 0);
|
|
if (!cur) {
|
|
free(fullname);
|
|
continue;
|
|
}
|
|
cur->fname_allocated = 1;
|
|
cur->next = dn;
|
|
dn = cur;
|
|
nfiles++;
|
|
}
|
|
closedir(dir);
|
|
|
|
if (dn == NULL)
|
|
return NULL;
|
|
|
|
/* now that we know how many files there are
|
|
* allocate memory for an array to hold dnode pointers
|
|
*/
|
|
*nfiles_p = nfiles;
|
|
dnp = dnalloc(nfiles);
|
|
for (i = 0; /* i < nfiles - detected via !dn below */; i++) {
|
|
dnp[i] = dn; /* save pointer to node in array */
|
|
dn = dn->next;
|
|
if (!dn)
|
|
break;
|
|
}
|
|
|
|
return dnp;
|
|
}
|
|
|
|
|
|
int ls_main(int argc UNUSED_PARAM, char **argv)
|
|
{
|
|
struct dnode **dnd;
|
|
struct dnode **dnf;
|
|
struct dnode **dnp;
|
|
struct dnode *dn;
|
|
struct dnode *cur;
|
|
unsigned opt;
|
|
unsigned nfiles;
|
|
unsigned dnfiles;
|
|
unsigned dndirs;
|
|
unsigned i;
|
|
#if ENABLE_FEATURE_LS_COLOR
|
|
/* colored LS support by JaWi, janwillem.janssen@lxtreme.nl */
|
|
/* coreutils 6.10:
|
|
* # ls --color=BOGUS
|
|
* ls: invalid argument 'BOGUS' for '--color'
|
|
* Valid arguments are:
|
|
* 'always', 'yes', 'force'
|
|
* 'never', 'no', 'none'
|
|
* 'auto', 'tty', 'if-tty'
|
|
* (and substrings: "--color=alwa" work too)
|
|
*/
|
|
static const char ls_longopts[] ALIGN1 =
|
|
"color\0" Optional_argument "\xff"; /* no short equivalent */
|
|
static const char color_str[] ALIGN1 =
|
|
"always\0""yes\0""force\0"
|
|
"auto\0""tty\0""if-tty\0";
|
|
/* need to initialize since --color has _an optional_ argument */
|
|
const char *color_opt = color_str; /* "always" */
|
|
#endif
|
|
|
|
INIT_G();
|
|
|
|
init_unicode();
|
|
|
|
all_fmt = LIST_SHORT |
|
|
(ENABLE_FEATURE_LS_SORTFILES * (SORT_NAME | SORT_FORWARD));
|
|
|
|
#if ENABLE_FEATURE_AUTOWIDTH
|
|
/* obtain the terminal width */
|
|
get_terminal_width_height(STDIN_FILENO, &terminal_width, NULL);
|
|
/* go one less... */
|
|
terminal_width--;
|
|
#endif
|
|
|
|
/* process options */
|
|
IF_FEATURE_LS_COLOR(applet_long_options = ls_longopts;)
|
|
#if ENABLE_FEATURE_AUTOWIDTH
|
|
opt_complementary = "T+:w+"; /* -T N, -w N */
|
|
opt = getopt32(argv, ls_options, &tabstops, &terminal_width
|
|
IF_FEATURE_LS_COLOR(, &color_opt));
|
|
#else
|
|
opt = getopt32(argv, ls_options IF_FEATURE_LS_COLOR(, &color_opt));
|
|
#endif
|
|
for (i = 0; opt_flags[i] != (1U<<31); i++) {
|
|
if (opt & (1 << i)) {
|
|
unsigned flags = opt_flags[i];
|
|
|
|
if (flags & LIST_MASK_TRIGGER)
|
|
all_fmt &= ~LIST_MASK;
|
|
if (flags & STYLE_MASK_TRIGGER)
|
|
all_fmt &= ~STYLE_MASK;
|
|
if (flags & SORT_MASK_TRIGGER)
|
|
all_fmt &= ~SORT_MASK;
|
|
if (flags & DISP_MASK_TRIGGER)
|
|
all_fmt &= ~DISP_MASK;
|
|
if (flags & TIME_MASK)
|
|
all_fmt &= ~TIME_MASK;
|
|
if (flags & LIST_CONTEXT)
|
|
all_fmt |= STYLE_SINGLE;
|
|
/* huh?? opt cannot be 'l' */
|
|
//if (LS_DISP_HR && opt == 'l')
|
|
// all_fmt &= ~LS_DISP_HR;
|
|
all_fmt |= flags;
|
|
}
|
|
}
|
|
|
|
#if ENABLE_FEATURE_LS_COLOR
|
|
/* find color bit value - last position for short getopt */
|
|
if (ENABLE_FEATURE_LS_COLOR_IS_DEFAULT && isatty(STDOUT_FILENO)) {
|
|
char *p = getenv("LS_COLORS");
|
|
/* LS_COLORS is unset, or (not empty && not "none") ? */
|
|
if (!p || (p[0] && strcmp(p, "none") != 0))
|
|
show_color = 1;
|
|
}
|
|
if (opt & OPT_color) {
|
|
if (color_opt[0] == 'n')
|
|
show_color = 0;
|
|
else switch (index_in_substrings(color_str, color_opt)) {
|
|
case 3:
|
|
case 4:
|
|
case 5:
|
|
if (isatty(STDOUT_FILENO)) {
|
|
case 0:
|
|
case 1:
|
|
case 2:
|
|
show_color = 1;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/* sort out which command line options take precedence */
|
|
if (ENABLE_FEATURE_LS_RECURSIVE && (all_fmt & DISP_NOLIST))
|
|
all_fmt &= ~DISP_RECURSIVE; /* no recurse if listing only dir */
|
|
if (ENABLE_FEATURE_LS_TIMESTAMPS && ENABLE_FEATURE_LS_SORTFILES) {
|
|
if (all_fmt & TIME_CHANGE)
|
|
all_fmt = (all_fmt & ~SORT_MASK) | SORT_CTIME;
|
|
if (all_fmt & TIME_ACCESS)
|
|
all_fmt = (all_fmt & ~SORT_MASK) | SORT_ATIME;
|
|
}
|
|
if ((all_fmt & STYLE_MASK) != STYLE_LONG) /* only for long list */
|
|
all_fmt &= ~(LIST_ID_NUMERIC|LIST_FULLTIME|LIST_ID_NAME|LIST_ID_NUMERIC);
|
|
if (ENABLE_FEATURE_LS_USERNAME)
|
|
if ((all_fmt & STYLE_MASK) == STYLE_LONG && (all_fmt & LIST_ID_NUMERIC))
|
|
all_fmt &= ~LIST_ID_NAME; /* don't list names if numeric uid */
|
|
|
|
/* choose a display format */
|
|
if (!(all_fmt & STYLE_MASK))
|
|
all_fmt |= (isatty(STDOUT_FILENO) ? STYLE_COLUMNS : STYLE_SINGLE);
|
|
|
|
argv += optind;
|
|
if (!argv[0])
|
|
*--argv = (char*)".";
|
|
|
|
if (argv[1])
|
|
all_fmt |= DISP_DIRNAME; /* 2 or more items? label directories */
|
|
|
|
/* stuff the command line file names into a dnode array */
|
|
dn = NULL;
|
|
nfiles = 0;
|
|
do {
|
|
/* NB: follow links on command line unless -l or -s */
|
|
cur = my_stat(*argv, *argv, !(all_fmt & (STYLE_LONG|LIST_BLOCKS)));
|
|
argv++;
|
|
if (!cur)
|
|
continue;
|
|
cur->fname_allocated = 0;
|
|
cur->next = dn;
|
|
dn = cur;
|
|
nfiles++;
|
|
} while (*argv);
|
|
|
|
/* nfiles _may_ be 0 here - try "ls doesnt_exist" */
|
|
if (nfiles == 0)
|
|
return exit_code;
|
|
|
|
/* now that we know how many files there are
|
|
* allocate memory for an array to hold dnode pointers
|
|
*/
|
|
dnp = dnalloc(nfiles);
|
|
for (i = 0; /* i < nfiles - detected via !dn below */; i++) {
|
|
dnp[i] = dn; /* save pointer to node in array */
|
|
dn = dn->next;
|
|
if (!dn)
|
|
break;
|
|
}
|
|
|
|
if (all_fmt & DISP_NOLIST) {
|
|
dnsort(dnp, nfiles);
|
|
showfiles(dnp, nfiles);
|
|
} else {
|
|
dnd = splitdnarray(dnp, SPLIT_DIR);
|
|
dnf = splitdnarray(dnp, SPLIT_FILE);
|
|
dndirs = count_dirs(dnp, SPLIT_DIR);
|
|
dnfiles = nfiles - dndirs;
|
|
if (dnfiles > 0) {
|
|
dnsort(dnf, dnfiles);
|
|
showfiles(dnf, dnfiles);
|
|
if (ENABLE_FEATURE_CLEAN_UP)
|
|
free(dnf);
|
|
}
|
|
if (dndirs > 0) {
|
|
dnsort(dnd, dndirs);
|
|
showdirs(dnd, dnfiles == 0);
|
|
if (ENABLE_FEATURE_CLEAN_UP)
|
|
free(dnd);
|
|
}
|
|
}
|
|
if (ENABLE_FEATURE_CLEAN_UP)
|
|
dfree(dnp);
|
|
return exit_code;
|
|
}
|