/* vi: set sw=4 ts=4: */ /* * Copyright (C) 1996 Brian Candler * * Licensed under GPLv2 or later, see file LICENSE in this source tree. */ /* [date unknown. Perhaps before year 2000] * To achieve a small memory footprint, this version of 'ls' doesn't do any * file sorting, and only has the most essential command line switches * (i.e., the ones I couldn't live without :-) All features which involve * linking in substantial chunks of libc can be disabled. * * Although I don't really want to add new features to this program to * keep it small, I *am* interested to receive bug fixes and ways to make * it more portable. * * KNOWN BUGS: * 1. hidden files can make column width too large * * NON-OPTIMAL BEHAVIOUR: * 1. autowidth reads directories twice * 2. if you do a short directory listing without filetype characters * appended, there's no need to stat each one * PORTABILITY: * 1. requires lstat (BSD) - how do you do it without? * * [2009-03] * ls sorts listing now, and supports almost all options. */ //config:config LS //config: bool "ls" //config: default y //config: help //config: ls is used to list the contents of directories. //config: //config:config FEATURE_LS_FILETYPES //config: bool "Enable filetyping options (-p and -F)" //config: default y //config: depends on LS //config: //config:config FEATURE_LS_FOLLOWLINKS //config: bool "Enable symlinks dereferencing (-L)" //config: default y //config: depends on LS //config: //config:config FEATURE_LS_RECURSIVE //config: bool "Enable recursion (-R)" //config: default y //config: depends on LS //config: //config:config FEATURE_LS_WIDTH //config: bool "Enable -w WIDTH and window size autodetection" //config: default y //config: depends on LS //config: //config:config FEATURE_LS_SORTFILES //config: bool "Sort the file names" //config: default y //config: depends on LS //config: help //config: Allow ls to sort file names alphabetically. //config: //config:config FEATURE_LS_TIMESTAMPS //config: bool "Show file timestamps" //config: default y //config: depends on LS //config: help //config: Allow ls to display timestamps for files. //config: //config:config FEATURE_LS_USERNAME //config: bool "Show username/groupnames" //config: default y //config: depends on LS //config: help //config: Allow ls to display username/groupname for files. //config: //config:config FEATURE_LS_COLOR //config: bool "Allow use of color to identify file types" //config: default y //config: depends on LS && LONG_OPTS //config: help //config: This enables the --color option to ls. //config: //config:config FEATURE_LS_COLOR_IS_DEFAULT //config: bool "Produce colored ls output by default" //config: default y //config: depends on FEATURE_LS_COLOR //config: help //config: Saying yes here will turn coloring on by default, //config: even if no "--color" option is given to the ls command. //config: This is not recommended, since the colors are not //config: configurable, and the output may not be legible on //config: many output screens. //applet:IF_LS(APPLET_NOEXEC(ls, ls, BB_DIR_BIN, BB_SUID_DROP, ls)) //kbuild:lib-$(CONFIG_LS) += ls.o //usage:#define ls_trivial_usage //usage: "[-1AaCxd" //usage: IF_FEATURE_LS_FOLLOWLINKS("LH") //usage: IF_FEATURE_LS_RECURSIVE("R") //usage: IF_FEATURE_LS_FILETYPES("Fp") "lins" //usage: IF_FEATURE_LS_TIMESTAMPS("e") //usage: IF_FEATURE_HUMAN_READABLE("h") //usage: IF_FEATURE_LS_SORTFILES("rSXv") //usage: IF_FEATURE_LS_TIMESTAMPS("ctu") //usage: IF_SELINUX("kKZ") "]" //usage: IF_FEATURE_LS_WIDTH(" [-w WIDTH]") " [FILE]..." //usage:#define ls_full_usage "\n\n" //usage: "List directory contents\n" //usage: "\n -1 One column output" //usage: "\n -a Include entries which start with ." //usage: "\n -A Like -a, but exclude . and .." //usage: "\n -C List by columns" //usage: "\n -x List by lines" //usage: "\n -d List directory entries instead of contents" //usage: IF_FEATURE_LS_FOLLOWLINKS( //usage: "\n -L Follow symlinks" //usage: "\n -H Follow symlinks on command line" //usage: ) //usage: IF_FEATURE_LS_RECURSIVE( //usage: "\n -R Recurse" //usage: ) //usage: IF_FEATURE_LS_FILETYPES( //usage: "\n -p Append / to dir entries" //usage: "\n -F Append indicator (one of */=@|) to entries" //usage: ) //usage: "\n -l Long listing format" //usage: "\n -i List inode numbers" //usage: "\n -n List numeric UIDs and GIDs instead of names" //usage: "\n -s List allocated blocks" //usage: IF_FEATURE_LS_TIMESTAMPS(IF_LONG_OPTS( //usage: "\n --full-time List full date and time" //usage: )) //usage: IF_FEATURE_HUMAN_READABLE( //usage: "\n -h List sizes in human readable format (1K 243M 2G)" //usage: ) //usage: IF_FEATURE_LS_SORTFILES( //usage: IF_LONG_OPTS( //usage: "\n --group-directories-first" //usage: ) //usage: "\n -S Sort by size" //usage: "\n -X Sort by extension" //usage: "\n -v Sort by version" //usage: "\n -r Reverse sort order" //usage: ) //usage: IF_FEATURE_LS_TIMESTAMPS( //usage: "\n -c With -l: sort by ctime" //usage: "\n -t With -l: sort by mtime" //usage: "\n -u With -l: sort by atime" //usage: ) //usage: IF_SELINUX( //usage: "\n -k List security context" //usage: "\n -Z List security context and permission" //usage: ) //usage: IF_FEATURE_LS_WIDTH( //usage: "\n -w N Assume the terminal is N columns wide" //usage: ) //usage: IF_FEATURE_LS_COLOR( //usage: "\n --color[={always,never,auto}] Control coloring" //usage: ) #include "libbb.h" #include "common_bufsiz.h" #include "unicode.h" /* This is a NOEXEC applet. Be very careful! */ #if ENABLE_FTPD /* ftpd uses ls, and without timestamps Mozilla won't understand * ftpd's LIST output. */ # undef CONFIG_FEATURE_LS_TIMESTAMPS # undef ENABLE_FEATURE_LS_TIMESTAMPS # undef IF_FEATURE_LS_TIMESTAMPS # undef IF_NOT_FEATURE_LS_TIMESTAMPS # define CONFIG_FEATURE_LS_TIMESTAMPS 1 # define ENABLE_FEATURE_LS_TIMESTAMPS 1 # define IF_FEATURE_LS_TIMESTAMPS(...) __VA_ARGS__ # define IF_NOT_FEATURE_LS_TIMESTAMPS(...) #endif enum { TERMINAL_WIDTH = 80, /* use 79 if terminal has linefold bug */ SPLIT_FILE = 0, SPLIT_DIR = 1, SPLIT_SUBDIR = 2, /* Bits in G.all_fmt: */ /* 51306 lrwxrwxrwx 1 root root 2 May 11 01:43 /bin/view -> vi* */ /* what file information will be listed */ LIST_INO = 1 << 0, LIST_BLOCKS = 1 << 1, LIST_MODEBITS = 1 << 2, LIST_NLINKS = 1 << 3, LIST_ID_NAME = 1 << 4, LIST_ID_NUMERIC = 1 << 5, LIST_CONTEXT = 1 << 6, LIST_SIZE = 1 << 7, LIST_DATE_TIME = 1 << 8, LIST_FULLTIME = 1 << 9, LIST_SYMLINK = 1 << 10, LIST_FILETYPE = 1 << 11, /* show / suffix for dirs */ LIST_CLASSIFY = 1 << 12, /* requires LIST_FILETYPE, also show *,|,@,= suffixes */ LIST_MASK = (LIST_CLASSIFY << 1) - 1, /* what files will be displayed */ DISP_DIRNAME = 1 << 13, /* 2 or more items? label directories */ DISP_HIDDEN = 1 << 14, /* show filenames starting with . */ DISP_DOT = 1 << 15, /* show . and .. */ DISP_NOLIST = 1 << 16, /* show directory as itself, not contents */ DISP_RECURSIVE = 1 << 17, /* show directory and everything below it */ DISP_ROWS = 1 << 18, /* print across rows */ DISP_MASK = ((DISP_ROWS << 1) - 1) & ~(DISP_DIRNAME - 1), /* what is the overall style of the listing */ STYLE_COLUMNAR = 1 << 19, /* many records per line */ STYLE_LONG = 2 << 19, /* one record per line, extended info */ STYLE_SINGLE = 3 << 19, /* one record per line */ STYLE_MASK = STYLE_SINGLE, /* which of the three times will be used */ TIME_CHANGE = (1 << 21) * ENABLE_FEATURE_LS_TIMESTAMPS, TIME_ACCESS = (2 << 21) * ENABLE_FEATURE_LS_TIMESTAMPS, TIME_MASK = (3 << 21) * ENABLE_FEATURE_LS_TIMESTAMPS, /* how will the files be sorted (CONFIG_FEATURE_LS_SORTFILES) */ SORT_REVERSE = 1 << 23, SORT_DIRS_FIRST = 1 << 24, SORT_NAME = 0, /* sort by file name */ SORT_SIZE = 1 << 25, /* sort by file size */ SORT_ATIME = 2 << 25, /* sort by last access time */ SORT_CTIME = 3 << 25, /* sort by last change time */ SORT_MTIME = 4 << 25, /* sort by last modification time */ SORT_VERSION = 5 << 25, /* sort by version */ SORT_EXT = 6 << 25, /* sort by file name extension */ SORT_MASK = (7 << 25) * ENABLE_FEATURE_LS_SORTFILES, LIST_LONG = LIST_MODEBITS | LIST_NLINKS | LIST_ID_NAME | LIST_SIZE | \ LIST_DATE_TIME | LIST_SYMLINK, }; /* -Cadil1 Std options, busybox always supports */ /* -gnsxA Std options, busybox always supports */ /* -Q GNU option, busybox always supports */ /* -k SELinux option, busybox always supports (ignores if !SELinux) */ /* Std has -k which means "for -s, show sizes in kbytes" */ /* Seems to only affect "POSIXLY_CORRECT=1 ls -sk" */ /* since otherwise -s shows kbytes anyway */ /* -LHRctur Std options, busybox optionally supports */ /* -Fp Std options, busybox optionally supports */ /* -SXvhTw GNU options, busybox optionally supports */ /* -T WIDTH Ignored (we don't use tabs on output) */ /* -Z SELinux mandated option, busybox optionally supports */ static const char ls_options[] ALIGN1 = "Cadil1gnsxQAk" /* 13 opts, total 13 */ IF_FEATURE_LS_TIMESTAMPS("ctu") /* 3, 16 */ IF_FEATURE_LS_SORTFILES("SXrv") /* 4, 20 */ IF_FEATURE_LS_FILETYPES("Fp") /* 2, 22 */ IF_FEATURE_LS_RECURSIVE("R") /* 1, 23 */ IF_SELINUX("Z") /* 1, 24 */ IF_FEATURE_LS_FOLLOWLINKS("LH") /* 2, 26 */ IF_FEATURE_HUMAN_READABLE("h") /* 1, 27 */ IF_FEATURE_LS_WIDTH("T:w:") /* 2, 29 */ /* with --color, we use all 32 bits */; enum { //OPT_C = (1 << 0), //OPT_a = (1 << 1), //OPT_d = (1 << 2), //OPT_i = (1 << 3), //OPT_l = (1 << 4), //OPT_1 = (1 << 5), OPT_g = (1 << 6), //OPT_n = (1 << 7), //OPT_s = (1 << 8), //OPT_x = (1 << 9), OPT_Q = (1 << 10), //OPT_A = (1 << 11), //OPT_k = (1 << 12), OPTBIT_c = 13, OPTBIT_t, OPTBIT_u, OPTBIT_S = OPTBIT_c + 3 * ENABLE_FEATURE_LS_TIMESTAMPS, OPTBIT_X, /* 17 */ OPTBIT_r, OPTBIT_v, OPTBIT_F = OPTBIT_S + 4 * ENABLE_FEATURE_LS_SORTFILES, OPTBIT_p, /* 21 */ OPTBIT_R = OPTBIT_F + 2 * ENABLE_FEATURE_LS_FILETYPES, OPTBIT_Z = OPTBIT_R + 1 * ENABLE_FEATURE_LS_RECURSIVE, OPTBIT_L = OPTBIT_Z + 2 * ENABLE_SELINUX, OPTBIT_H, /* 25 */ OPTBIT_h = OPTBIT_L + 2 * ENABLE_FEATURE_LS_FOLLOWLINKS, OPTBIT_T = OPTBIT_h + 1 * ENABLE_FEATURE_HUMAN_READABLE, OPTBIT_w, /* 28 */ OPTBIT_color = OPTBIT_T + 2 * ENABLE_FEATURE_LS_WIDTH, OPTBIT_dirs_first = OPTBIT_color + 1 * ENABLE_FEATURE_LS_COLOR, OPTBIT_full_time, OPT_c = (1 << OPTBIT_c) * ENABLE_FEATURE_LS_TIMESTAMPS, OPT_t = (1 << OPTBIT_t) * ENABLE_FEATURE_LS_TIMESTAMPS, OPT_u = (1 << OPTBIT_u) * ENABLE_FEATURE_LS_TIMESTAMPS, OPT_S = (1 << OPTBIT_S) * ENABLE_FEATURE_LS_SORTFILES, OPT_X = (1 << OPTBIT_X) * ENABLE_FEATURE_LS_SORTFILES, OPT_r = (1 << OPTBIT_r) * ENABLE_FEATURE_LS_SORTFILES, OPT_v = (1 << OPTBIT_v) * ENABLE_FEATURE_LS_SORTFILES, OPT_F = (1 << OPTBIT_F) * ENABLE_FEATURE_LS_FILETYPES, OPT_p = (1 << OPTBIT_p) * ENABLE_FEATURE_LS_FILETYPES, OPT_R = (1 << OPTBIT_R) * ENABLE_FEATURE_LS_RECURSIVE, OPT_Z = (1 << OPTBIT_Z) * ENABLE_SELINUX, OPT_L = (1 << OPTBIT_L) * ENABLE_FEATURE_LS_FOLLOWLINKS, OPT_H = (1 << OPTBIT_H) * ENABLE_FEATURE_LS_FOLLOWLINKS, OPT_h = (1 << OPTBIT_h) * ENABLE_FEATURE_HUMAN_READABLE, OPT_T = (1 << OPTBIT_T) * ENABLE_FEATURE_LS_WIDTH, OPT_w = (1 << OPTBIT_w) * ENABLE_FEATURE_LS_WIDTH, OPT_color = (1 << OPTBIT_color ) * ENABLE_FEATURE_LS_COLOR, OPT_dirs_first = (1 << OPTBIT_dirs_first) * ENABLE_LONG_OPTS, OPT_full_time = (1 << OPTBIT_full_time ) * ENABLE_LONG_OPTS, }; /* TODO: simple toggles may be stored as OPT_xxx bits instead */ static const uint32_t opt_flags[] = { STYLE_COLUMNAR, /* C */ DISP_HIDDEN | DISP_DOT, /* a */ DISP_NOLIST, /* d */ LIST_INO, /* i */ LIST_LONG | STYLE_LONG, /* l */ STYLE_SINGLE, /* 1 */ LIST_LONG | STYLE_LONG, /* g (don't show owner) - handled via OPT_g. assumes l */ LIST_ID_NUMERIC | LIST_LONG | STYLE_LONG, /* n (assumes l) */ LIST_BLOCKS, /* s */ DISP_ROWS | STYLE_COLUMNAR, /* x */ 0, /* Q (quote filename) - handled via OPT_Q */ DISP_HIDDEN, /* A */ ENABLE_SELINUX * (LIST_CONTEXT|STYLE_SINGLE), /* k (ignored if !SELINUX) */ #if ENABLE_FEATURE_LS_TIMESTAMPS TIME_CHANGE | (ENABLE_FEATURE_LS_SORTFILES * SORT_CTIME), /* c */ ENABLE_FEATURE_LS_SORTFILES * SORT_MTIME, /* t */ TIME_ACCESS | (ENABLE_FEATURE_LS_SORTFILES * SORT_ATIME), /* u */ #endif #if ENABLE_FEATURE_LS_SORTFILES SORT_SIZE, /* S */ SORT_EXT, /* X */ SORT_REVERSE, /* r */ SORT_VERSION, /* v */ #endif #if ENABLE_FEATURE_LS_FILETYPES LIST_FILETYPE | LIST_CLASSIFY, /* F */ LIST_FILETYPE, /* p */ #endif #if ENABLE_FEATURE_LS_RECURSIVE DISP_RECURSIVE, /* R */ #endif #if ENABLE_SELINUX LIST_MODEBITS|LIST_ID_NAME|LIST_CONTEXT|STYLE_SINGLE, /* Z */ #endif (1U << 31) /* options after Z are not processed through opt_flags */ }; /* * a directory entry and its stat info */ struct dnode { const char *name; /* usually basename, but think "ls -l dir/file" */ const char *fullname; /* full name (usable for stat etc) */ struct dnode *dn_next; /* for linked list */ IF_SELINUX(security_context_t sid;) smallint fname_allocated; /* Used to avoid re-doing [l]stat at printout stage * if we already collected needed data in scan stage: */ mode_t dn_mode_lstat; /* obtained with lstat, or 0 */ mode_t dn_mode_stat; /* obtained with stat, or 0 */ // struct stat dstat; // struct stat is huge. We don't need it in full. // At least we don't need st_dev and st_blksize, // but there are invisible fields as well // (such as nanosecond-resolution timespamps) // and padding, which we also don't want to store. // We also can pre-parse dev_t dn_rdev (in glibc, it's huge). // On 32-bit uclibc: dnode size went from 112 to 84 bytes. // /* Same names as in struct stat, but with dn_ instead of st_ pfx: */ mode_t dn_mode; /* obtained with lstat OR stat, depending on -L etc */ off_t dn_size; #if ENABLE_FEATURE_LS_TIMESTAMPS || ENABLE_FEATURE_LS_SORTFILES time_t dn_atime; time_t dn_mtime; time_t dn_ctime; #endif ino_t dn_ino; blkcnt_t dn_blocks; nlink_t dn_nlink; uid_t dn_uid; gid_t dn_gid; int dn_rdev_maj; int dn_rdev_min; // dev_t dn_dev; // blksize_t dn_blksize; }; struct globals { #if ENABLE_FEATURE_LS_COLOR smallint show_color; # define G_show_color (G.show_color) #else # define G_show_color 0 #endif smallint exit_code; unsigned all_fmt; #if ENABLE_FEATURE_LS_WIDTH unsigned terminal_width; # define G_terminal_width (G.terminal_width) #else # define G_terminal_width TERMINAL_WIDTH #endif #if ENABLE_FEATURE_LS_TIMESTAMPS /* Do time() just once. Saves one syscall per file for "ls -l" */ time_t current_time_t; #endif } FIX_ALIASING; #define G (*(struct globals*)bb_common_bufsiz1) #define INIT_G() do { \ setup_common_bufsiz(); \ /* we have to zero it out because of NOEXEC */ \ memset(&G, 0, sizeof(G)); \ IF_FEATURE_LS_WIDTH(G_terminal_width = TERMINAL_WIDTH;) \ IF_FEATURE_LS_TIMESTAMPS(time(&G.current_time_t);) \ } while (0) /*** Output code ***/ /* FYI type values: 1:fifo 2:char 4:dir 6:blk 8:file 10:link 12:socket * (various wacky OSes: 13:Sun door 14:BSD whiteout 5:XENIX named file * 3/7:multiplexed char/block device) * and we use 0 for unknown and 15 for executables (see below) */ #define TYPEINDEX(mode) (((mode) >> 12) & 0x0f) /* un fi chr - dir - blk - file - link - sock - - exe */ #define APPCHAR(mode) ("\0""|""\0""\0""/""\0""\0""\0""\0""\0""@""\0""=""\0""\0""\0" [TYPEINDEX(mode)]) /* 036 black foreground 050 black background 037 red foreground 051 red background 040 green foreground 052 green background 041 brown foreground 053 brown background 042 blue foreground 054 blue background 043 magenta (purple) foreground 055 magenta background 044 cyan (light blue) foreground 056 cyan background 045 gray foreground 057 white background */ #define COLOR(mode) ( \ /*un fi chr - dir - blk - file - link - sock - - exe */ \ "\037\043\043\045\042\045\043\043\000\045\044\045\043\045\045\040" \ [TYPEINDEX(mode)]) /* Select normal (0) [actually "reset all"] or bold (1) * (other attributes are 2:dim 4:underline 5:blink 7:reverse, * let's use 7 for "impossible" types, just for fun) * Note: coreutils 6.9 uses inverted red for setuid binaries. */ #define ATTR(mode) ( \ /*un fi chr - dir - blk - file- link- sock- - exe */ \ "\01\00\01\07\01\07\01\07\00\07\01\07\01\07\07\01" \ [TYPEINDEX(mode)]) #if ENABLE_FEATURE_LS_COLOR /* mode of zero is interpreted as "unknown" (stat failed) */ static char fgcolor(mode_t mode) { if (S_ISREG(mode) && (mode & (S_IXUSR | S_IXGRP | S_IXOTH))) return COLOR(0xF000); /* File is executable ... */ return COLOR(mode); } static char bold(mode_t mode) { if (S_ISREG(mode) && (mode & (S_IXUSR | S_IXGRP | S_IXOTH))) return ATTR(0xF000); /* File is executable ... */ return ATTR(mode); } #endif #if ENABLE_FEATURE_LS_FILETYPES static char append_char(mode_t mode) { if (!(G.all_fmt & LIST_FILETYPE)) return '\0'; if (S_ISDIR(mode)) return '/'; if (!(G.all_fmt & LIST_CLASSIFY)) return '\0'; if (S_ISREG(mode) && (mode & (S_IXUSR | S_IXGRP | S_IXOTH))) return '*'; return APPCHAR(mode); } #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_COLUMNAR 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); name++; } putchar('"'); return len; } /* Return the number of used columns. * Note that only STYLE_COLUMNAR uses return value, * STYLE_SINGLE and STYLE_LONG don't care. */ static NOINLINE unsigned display_single(const struct dnode *dn) { unsigned column = 0; char *lpath; #if ENABLE_FEATURE_LS_FILETYPES || ENABLE_FEATURE_LS_COLOR struct stat statbuf; char append; #endif #if ENABLE_FEATURE_LS_FILETYPES append = append_char(dn->dn_mode); #endif /* Do readlink early, so that if it fails, error message * does not appear *inside* the "ls -l" line */ lpath = NULL; if (G.all_fmt & LIST_SYMLINK) if (S_ISLNK(dn->dn_mode)) lpath = xmalloc_readlink_or_warn(dn->fullname); if (G.all_fmt & LIST_INO) column += printf("%7llu ", (long long) dn->dn_ino); //TODO: -h should affect -s too: if (G.all_fmt & LIST_BLOCKS) column += printf("%6"OFF_FMT"u ", (off_t) (dn->dn_blocks >> 1)); if (G.all_fmt & LIST_MODEBITS) column += printf("%-10s ", (char *) bb_mode_string(dn->dn_mode)); if (G.all_fmt & LIST_NLINKS) column += printf("%4lu ", (long) dn->dn_nlink); if (G.all_fmt & LIST_ID_NUMERIC) { if (option_mask32 & OPT_g) column += printf("%-8u ", (int) dn->dn_gid); else column += printf("%-8u %-8u ", (int) dn->dn_uid, (int) dn->dn_gid); } #if ENABLE_FEATURE_LS_USERNAME else if (G.all_fmt & LIST_ID_NAME) { if (option_mask32 & OPT_g) { column += printf("%-8.8s ", get_cached_groupname(dn->dn_gid)); } else { column += printf("%-8.8s %-8.8s ", get_cached_username(dn->dn_uid), get_cached_groupname(dn->dn_gid)); } } #endif if (G.all_fmt & LIST_SIZE) { if (S_ISBLK(dn->dn_mode) || S_ISCHR(dn->dn_mode)) { column += printf("%4u, %3u ", dn->dn_rdev_maj, dn->dn_rdev_min); } else { if (option_mask32 & OPT_h) { column += printf("%"HUMAN_READABLE_MAX_WIDTH_STR"s ", /* print size, show one fractional, use suffixes */ make_human_readable_str(dn->dn_size, 1, 0) ); } else { column += printf("%9"OFF_FMT"u ", dn->dn_size); } } } #if ENABLE_FEATURE_LS_TIMESTAMPS if (G.all_fmt & (LIST_FULLTIME|LIST_DATE_TIME)) { const time_t *ttime = &dn->dn_mtime; if (G.all_fmt & TIME_ACCESS) ttime = &dn->dn_atime; if (G.all_fmt & TIME_CHANGE) ttime = &dn->dn_ctime; if (G.all_fmt & LIST_FULLTIME) { /* --full-time */ /* coreutils 8.4 ls --full-time prints: * 2009-07-13 17:49:27.000000000 +0200 */ char buf[sizeof("YYYY-mm-dd HH:MM:SS TIMEZONE")]; strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S %z", localtime(ttime)); column += printf("%s ", buf); } else { /* LIST_DATE_TIME */ /* G.current_time_t is ~== time(NULL) */ char *filetime = ctime(ttime); /* filetime's format: "Wed Jun 30 21:49:08 1993\n" */ time_t age = G.current_time_t - *ttime; if (age < 3600L * 24 * 365 / 2 && age > -15 * 60) { /* less than 6 months old */ /* "mmm dd hh:mm " */ printf("%.12s ", filetime + 4); } else { /* "mmm dd yyyy " */ /* "mmm dd yyyyy " after year 9999 :) */ strchr(filetime + 20, '\n')[0] = ' '; printf("%.7s%6s", filetime + 4, filetime + 20); } column += 13; } } #endif #if ENABLE_SELINUX if (G.all_fmt & LIST_CONTEXT) { column += printf("%-32s ", dn->sid ? dn->sid : "unknown"); freecon(dn->sid); } #endif #if ENABLE_FEATURE_LS_COLOR if (G_show_color) { mode_t mode = dn->dn_mode_lstat; if (!mode) if (lstat(dn->fullname, &statbuf) == 0) mode = statbuf.st_mode; printf("\033[%u;%um", bold(mode), fgcolor(mode)); } #endif column += print_name(dn->name); if (G_show_color) { printf("\033[0m"); } if (lpath) { printf(" -> "); #if ENABLE_FEATURE_LS_FILETYPES || ENABLE_FEATURE_LS_COLOR if ((G.all_fmt & LIST_FILETYPE) || G_show_color) { mode_t mode = dn->dn_mode_stat; if (!mode) if (stat(dn->fullname, &statbuf) == 0) mode = statbuf.st_mode; # if ENABLE_FEATURE_LS_FILETYPES append = append_char(mode); # endif # if ENABLE_FEATURE_LS_COLOR if (G_show_color) { printf("\033[%u;%um", bold(mode), fgcolor(mode)); } # endif } #endif column += print_name(lpath) + 4; free(lpath); if (G_show_color) { printf("\033[0m"); } } #if ENABLE_FEATURE_LS_FILETYPES if (G.all_fmt & LIST_FILETYPE) { if (append) { putchar(append); column++; } } #endif return column; } static void display_files(struct dnode **dn, unsigned nfiles) { unsigned i, ncols, nrows, row, nc; unsigned column; unsigned nexttab; unsigned column_width = 0; /* used only by STYLE_COLUMNAR */ if (G.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 += 2 + IF_SELINUX( ((G.all_fmt & LIST_CONTEXT) ? 33 : 0) + ) ((G.all_fmt & LIST_INO) ? 8 : 0) + ((G.all_fmt & LIST_BLOCKS) ? 5 : 0); ncols = (unsigned)G_terminal_width / column_width; } if (ncols > 1) { nrows = nfiles / ncols; if (nrows * ncols < nfiles) nrows++; /* round up fractionals */ } else { nrows = nfiles; ncols = 1; } column = 0; nexttab = 0; for (row = 0; row < nrows; row++) { for (nc = 0; nc < ncols; nc++) { /* reach into the array based on the column and row */ if (G.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 += display_single(dn[i]); } } putchar('\n'); column = 0; } } /*** Dir scanning code ***/ static struct dnode *my_stat(const char *fullname, const char *name, int force_follow) { struct stat statbuf; struct dnode *cur; cur = xzalloc(sizeof(*cur)); cur->fullname = fullname; cur->name = name; if ((option_mask32 & OPT_L) || force_follow) { #if ENABLE_SELINUX if (is_selinux_enabled()) { getfilecon(fullname, &cur->sid); } #endif if (stat(fullname, &statbuf)) { bb_simple_perror_msg(fullname); G.exit_code = EXIT_FAILURE; free(cur); return NULL; } cur->dn_mode_stat = statbuf.st_mode; } else { #if ENABLE_SELINUX if (is_selinux_enabled()) { lgetfilecon(fullname, &cur->sid); } #endif if (lstat(fullname, &statbuf)) { bb_simple_perror_msg(fullname); G.exit_code = EXIT_FAILURE; free(cur); return NULL; } cur->dn_mode_lstat = statbuf.st_mode; } /* cur->dstat = statbuf: */ cur->dn_mode = statbuf.st_mode ; cur->dn_size = statbuf.st_size ; #if ENABLE_FEATURE_LS_TIMESTAMPS || ENABLE_FEATURE_LS_SORTFILES cur->dn_atime = statbuf.st_atime ; cur->dn_mtime = statbuf.st_mtime ; cur->dn_ctime = statbuf.st_ctime ; #endif cur->dn_ino = statbuf.st_ino ; cur->dn_blocks = statbuf.st_blocks; cur->dn_nlink = statbuf.st_nlink ; cur->dn_uid = statbuf.st_uid ; cur->dn_gid = statbuf.st_gid ; cur->dn_rdev_maj = major(statbuf.st_rdev); cur->dn_rdev_min = minor(statbuf.st_rdev); return cur; } static unsigned count_dirs(struct dnode **dn, int which) { unsigned dirs, all; if (!dn) return 0; dirs = all = 0; for (; *dn; dn++) { const char *name; all++; if (!S_ISDIR((*dn)->dn_mode)) continue; name = (*dn)->name; if (which != SPLIT_SUBDIR /* if not requested to skip . / .. */ /* or if it's not . or .. */ || name[0] != '.' || (name[1] && (name[1] != '.' || name[2])) ) { dirs++; } } return which != SPLIT_FILE ? dirs : all - dirs; } /* get memory to hold an array of pointers */ static struct dnode **dnalloc(unsigned num) { if (num < 1) return NULL; num++; /* so that we have terminating NULL */ return xzalloc(num * sizeof(struct dnode *)); } #if ENABLE_FEATURE_LS_RECURSIVE static void dfree(struct dnode **dnp) { unsigned i; if (dnp == NULL) return; for (i = 0; dnp[i]; i++) { struct dnode *cur = dnp[i]; if (cur->fname_allocated) free((char*)cur->fullname); free(cur); } free(dnp); } #else #define dfree(...) ((void)0) #endif /* Returns NULL-terminated malloced vector of pointers (or NULL) */ static struct dnode **splitdnarray(struct dnode **dn, int which) { unsigned dncnt, d; struct dnode **dnp; if (dn == NULL) return NULL; /* count how many dirs or files there are */ dncnt = count_dirs(dn, which); /* allocate a file array and a dir array */ dnp = dnalloc(dncnt); /* copy the entrys into the file or dir array */ for (d = 0; *dn; dn++) { if (S_ISDIR((*dn)->dn_mode)) { const char *name; if (which == SPLIT_FILE) continue; name = (*dn)->name; if ((which & SPLIT_DIR) /* any dir... */ /* ... or not . or .. */ || name[0] != '.' || (name[1] && (name[1] != '.' || name[2])) ) { dnp[d++] = *dn; } } else if (which == SPLIT_FILE) { 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 = G.all_fmt & SORT_MASK; off_t dif; dif = 0; /* assume SORT_NAME */ // TODO: use pre-initialized function pointer // instead of branch forest if (G.all_fmt & SORT_DIRS_FIRST) { dif = S_ISDIR(d2->dn_mode) - S_ISDIR(d1->dn_mode); if (dif != 0) goto maybe_invert_and_ret; } if (sort_opts == SORT_SIZE) { dif = (d2->dn_size - d1->dn_size); } else if (sort_opts == SORT_ATIME) { dif = (d2->dn_atime - d1->dn_atime); } else if (sort_opts == SORT_CTIME) { dif = (d2->dn_ctime - d1->dn_ctime); } else if (sort_opts == SORT_MTIME) { dif = (d2->dn_mtime - d1->dn_mtime); } else #if defined(HAVE_STRVERSCMP) && HAVE_STRVERSCMP == 1 if (sort_opts == SORT_VERSION) { dif = strverscmp(d1->name, d2->name); } else #endif if (sort_opts == SORT_EXT) { dif = strcmp(strchrnul(d1->name, '.'), strchrnul(d2->name, '.')); } if (dif == 0) { /* sort by name, use as 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); } } maybe_invert_and_ret: return (G.all_fmt & SORT_REVERSE) ? -(int)dif : (int)dif; } static void dnsort(struct dnode **dn, int size) { qsort(dn, size, sizeof(*dn), sortcmp); } static void sort_and_display_files(struct dnode **dn, unsigned nfiles) { dnsort(dn, nfiles); display_files(dn, nfiles); } #else # define dnsort(dn, size) ((void)0) # define sort_and_display_files(dn, nfiles) display_files(dn, nfiles) #endif /* Returns NULL-terminated malloced vector of pointers (or NULL) */ static struct dnode **scan_one_dir(const char *path, unsigned *nfiles_p) { struct dnode *dn, *cur, **dnp; struct dirent *entry; DIR *dir; unsigned i, nfiles; *nfiles_p = 0; dir = warn_opendir(path); if (dir == NULL) { G.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])) && !(G.all_fmt & DISP_DOT) ) { continue; } if (!(G.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->dn_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->dn_next; if (!dn) break; } return dnp; } #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)->dn_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 void scan_and_display_dirs_recur(struct dnode **dn, int first) { unsigned nfiles; struct dnode **subdnp; for (; *dn; dn++) { if (G.all_fmt & (DISP_DIRNAME | DISP_RECURSIVE)) { if (!first) bb_putchar('\n'); first = 0; printf("%s:\n", (*dn)->fullname); } subdnp = scan_one_dir((*dn)->fullname, &nfiles); #if ENABLE_DESKTOP if ((G.all_fmt & STYLE_MASK) == STYLE_LONG || (G.all_fmt & LIST_BLOCKS)) printf("total %"OFF_FMT"u\n", calculate_blocks(subdnp)); #endif if (nfiles > 0) { /* list all files at this level */ sort_and_display_files(subdnp, nfiles); if (ENABLE_FEATURE_LS_RECURSIVE && (G.all_fmt & DISP_RECURSIVE) ) { struct dnode **dnd; unsigned dndirs; /* recursive - list the sub-dirs */ dnd = splitdnarray(subdnp, SPLIT_SUBDIR); dndirs = count_dirs(subdnp, SPLIT_SUBDIR); if (dndirs > 0) { dnsort(dnd, dndirs); scan_and_display_dirs_recur(dnd, 0); /* free the array of dnode pointers to the dirs */ free(dnd); } } /* free the dnodes and the fullname mem */ dfree(subdnp); } } } 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 */ "group-directories-first\0" No_argument "\xfe" "full-time\0" No_argument "\xfd" ; 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(); if (ENABLE_FEATURE_LS_SORTFILES) G.all_fmt = SORT_NAME; #if ENABLE_FEATURE_LS_WIDTH /* obtain the terminal width */ G_terminal_width = get_terminal_width(STDIN_FILENO); /* go one less... */ G_terminal_width--; #endif /* process options */ IF_FEATURE_LS_COLOR(applet_long_options = ls_longopts;) opt_complementary = /* --full-time implies -l */ IF_FEATURE_LS_TIMESTAMPS(IF_LONG_OPTS("\xfd""l")) /* http://pubs.opengroup.org/onlinepubs/9699919799/utilities/ls.html: * in some pairs of opts, only last one takes effect: */ IF_FEATURE_LS_TIMESTAMPS(IF_FEATURE_LS_SORTFILES(":t-S:S-t")) /* time/size */ // ":m-l:l-m" - we don't have -m IF_FEATURE_LS_FOLLOWLINKS(":H-L:L-H") ":C-xl:x-Cl:l-xC" /* bycols/bylines/long */ ":C-1:1-C" /* bycols/oneline */ ":x-1:1-x" /* bylines/oneline (not in SuS, but in GNU coreutils 8.4) */ IF_FEATURE_LS_TIMESTAMPS(":c-u:u-c") /* mtime/atime */ /* -w NUM: */ IF_FEATURE_LS_WIDTH(":w+"); opt = getopt32(argv, ls_options IF_FEATURE_LS_WIDTH(, NULL, &G_terminal_width) IF_FEATURE_LS_COLOR(, &color_opt) ); #if 0 /* option bits debug */ bb_error_msg("opt:0x%08x H:%x color:%x dirs:%x", opt, OPT_H, OPT_color, OPT_dirs_first); if (opt & OPT_c ) bb_error_msg("-c"); if (opt & OPT_H ) bb_error_msg("-H"); if (opt & OPT_color ) bb_error_msg("--color"); if (opt & OPT_dirs_first) bb_error_msg("--group-directories-first"); if (opt & OPT_full_time ) bb_error_msg("--full-time"); exit(0); #endif for (i = 0; opt_flags[i] != (1U << 31); i++) { if (opt & (1 << i)) { uint32_t flags = opt_flags[i]; if (flags & STYLE_MASK) G.all_fmt &= ~STYLE_MASK; if (flags & SORT_MASK) G.all_fmt &= ~SORT_MASK; if (flags & TIME_MASK) G.all_fmt &= ~TIME_MASK; G.all_fmt |= flags; } } #if ENABLE_FEATURE_LS_COLOR /* set G_show_color = 1/0 */ 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)) G_show_color = 1; } if (opt & OPT_color) { if (color_opt[0] == 'n') G_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: G_show_color = 1; } } } #endif if (opt & OPT_dirs_first) G.all_fmt |= SORT_DIRS_FIRST; if (opt & OPT_full_time) G.all_fmt |= LIST_FULLTIME; /* sort out which command line options take precedence */ if (ENABLE_FEATURE_LS_RECURSIVE && (G.all_fmt & DISP_NOLIST)) G.all_fmt &= ~DISP_RECURSIVE; /* no recurse if listing only dir */ if (ENABLE_FEATURE_LS_TIMESTAMPS && ENABLE_FEATURE_LS_SORTFILES) { if (G.all_fmt & TIME_CHANGE) G.all_fmt = (G.all_fmt & ~SORT_MASK) | SORT_CTIME; if (G.all_fmt & TIME_ACCESS) G.all_fmt = (G.all_fmt & ~SORT_MASK) | SORT_ATIME; } if ((G.all_fmt & STYLE_MASK) != STYLE_LONG) /* not -l? */ G.all_fmt &= ~(LIST_ID_NUMERIC|LIST_ID_NAME|LIST_FULLTIME); /* choose a display format if one was not already specified by an option */ if (!(G.all_fmt & STYLE_MASK)) G.all_fmt |= (isatty(STDOUT_FILENO) ? STYLE_COLUMNAR : STYLE_SINGLE); argv += optind; if (!argv[0]) *--argv = (char*)"."; if (argv[1]) G.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 { cur = my_stat(*argv, *argv, /* follow links on command line unless -l, -s or -F: */ !((G.all_fmt & STYLE_MASK) == STYLE_LONG || (G.all_fmt & LIST_BLOCKS) || (option_mask32 & OPT_F) ) /* ... or if -H: */ || (option_mask32 & OPT_H) /* ... or if -L, but my_stat always follows links if -L */ ); argv++; if (!cur) continue; /*cur->fname_allocated = 0; - already is */ cur->dn_next = dn; dn = cur; nfiles++; } while (*argv); /* nfiles _may_ be 0 here - try "ls doesnt_exist" */ if (nfiles == 0) return G.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->dn_next; if (!dn) break; } if (G.all_fmt & DISP_NOLIST) { sort_and_display_files(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) { sort_and_display_files(dnf, dnfiles); if (ENABLE_FEATURE_CLEAN_UP) free(dnf); } if (dndirs > 0) { dnsort(dnd, dndirs); scan_and_display_dirs_recur(dnd, dnfiles == 0); if (ENABLE_FEATURE_CLEAN_UP) free(dnd); } } if (ENABLE_FEATURE_CLEAN_UP) dfree(dnp); return G.exit_code; }