/* vi: set sw=4 ts=4: */ /* * tiny-ls.c version 0.1.0: A minimalist 'ls' * Copyright (C) 1996 Brian Candler <B.Candler@pobox.com> * * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. */ /* * 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. ls -l of a directory doesn't give "total <blocks>" header * 2. ls of a symlink to a directory doesn't list directory contents * 3. 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? */ enum { TERMINAL_WIDTH = 80, /* use 79 if terminal has linefold bug */ COLUMN_GAP = 2, /* includes the file type char */ }; /************************************************************************/ #include <sys/types.h> #include <sys/stat.h> #include <stdio.h> #include <unistd.h> #include <dirent.h> #include <errno.h> #include <stdio.h> #include <string.h> #include <stdlib.h> #include <fcntl.h> #include <signal.h> #include <termios.h> #include <getopt.h> /* struct option */ #include <sys/ioctl.h> #include <sys/sysmacros.h> /* major() and minor() */ #include "busybox.h" #ifdef CONFIG_SELINUX #include <selinux/selinux.h> /* for is_selinux_enabled() */ #endif #ifdef CONFIG_FEATURE_LS_TIMESTAMPS #include <time.h> #endif /* what is the overall style of the listing */ #define STYLE_AUTO (0) #define STYLE_COLUMNS (1U<<21) /* fill columns */ #define STYLE_LONG (2U<<21) /* one record per line, extended info */ #define STYLE_SINGLE (3U<<21) /* one record per line */ #define STYLE_MASK STYLE_SINGLE #define STYLE_ONE_RECORD_FLAG STYLE_LONG /* 51306 lrwxrwxrwx 1 root root 2 May 11 01:43 /bin/view -> vi* */ /* what file information will be listed */ #define LIST_INO (1U<<0) #define LIST_BLOCKS (1U<<1) #define LIST_MODEBITS (1U<<2) #define LIST_NLINKS (1U<<3) #define LIST_ID_NAME (1U<<4) #define LIST_ID_NUMERIC (1U<<5) #define LIST_CONTEXT (1U<<6) #define LIST_SIZE (1U<<7) #define LIST_DEV (1U<<8) #define LIST_DATE_TIME (1U<<9) #define LIST_FULLTIME (1U<<10) #define LIST_FILENAME (1U<<11) #define LIST_SYMLINK (1U<<12) #define LIST_FILETYPE (1U<<13) #define LIST_EXEC (1U<<14) #define LIST_MASK ((LIST_EXEC << 1) - 1) /* what files will be displayed */ /* TODO -- We may be able to make DISP_NORMAL 0 to save a bit slot. */ #define DISP_NORMAL (1U<<14) /* show normal filenames */ #define DISP_DIRNAME (1U<<15) /* 2 or more items? label directories */ #define DISP_HIDDEN (1U<<16) /* show filenames starting with . */ #define DISP_DOT (1U<<17) /* show . and .. */ #define DISP_NOLIST (1U<<18) /* show directory as itself, not contents */ #define DISP_RECURSIVE (1U<<19) /* show directory and everything below it */ #define DISP_ROWS (1U<<20) /* print across rows */ #define DISP_MASK (((DISP_ROWS << 1) - 1) & ~(DISP_NORMAL - 1)) #ifdef CONFIG_FEATURE_LS_SORTFILES /* how will the files be sorted */ #define SORT_ORDER_FORWARD 0 /* sort in reverse order */ #define SORT_ORDER_REVERSE (1U<<27) /* sort in reverse order */ #define SORT_NAME 0 /* sort by file name */ #define SORT_SIZE (1U<<28) /* sort by file size */ #define SORT_ATIME (2U<<28) /* sort by last access time */ #define SORT_CTIME (3U<<28) /* sort by last change time */ #define SORT_MTIME (4U<<28) /* sort by last modification time */ #define SORT_VERSION (5U<<28) /* sort by version */ #define SORT_EXT (6U<<28) /* sort by file name extension */ #define SORT_DIR (7U<<28) /* sort by file or directory */ #define SORT_MASK (7U<<28) #endif #ifdef CONFIG_FEATURE_LS_TIMESTAMPS /* which of the three times will be used */ #define TIME_MOD 0 #define TIME_CHANGE (1U<<23) #define TIME_ACCESS (1U<<24) #define TIME_MASK (3U<<23) #endif #ifdef CONFIG_FEATURE_LS_FOLLOWLINKS #define FOLLOW_LINKS (1U<<25) #endif #ifdef CONFIG_FEATURE_HUMAN_READABLE #define LS_DISP_HR (1U<<26) #endif #define LIST_SHORT (LIST_FILENAME) #define LIST_ISHORT (LIST_INO | LIST_FILENAME) #define LIST_LONG (LIST_MODEBITS | LIST_NLINKS | LIST_ID_NAME | LIST_SIZE | \ LIST_DATE_TIME | LIST_FILENAME | LIST_SYMLINK) #define LIST_ILONG (LIST_INO | LIST_LONG) #define SPLIT_DIR 1 #define SPLIT_FILE 0 #define SPLIT_SUBDIR 2 #define TYPEINDEX(mode) (((mode) >> 12) & 0x0f) #define TYPECHAR(mode) ("0pcCd?bB-?l?s???" [TYPEINDEX(mode)]) #if defined(CONFIG_FEATURE_LS_FILETYPES) || defined(CONFIG_FEATURE_LS_COLOR) # define APPCHAR(mode) ("\0|\0\0/\0\0\0\0\0@\0=\0\0\0" [TYPEINDEX(mode)]) #endif /* colored LS support by JaWi, janwillem.janssen@lxtreme.nl */ #ifdef CONFIG_FEATURE_LS_COLOR static int show_color = 0; /* long option entry used only for --color, which has no short option * equivalent. */ static const struct option ls_color_opt[] = { {"color", optional_argument, NULL, 1}, {NULL, 0, NULL, 0} }; #define COLOR(mode) ("\000\043\043\043\042\000\043\043"\ "\000\000\044\000\043\000\000\040" [TYPEINDEX(mode)]) #define ATTR(mode) ("\00\00\01\00\01\00\01\00"\ "\00\00\01\00\01\00\00\01" [TYPEINDEX(mode)]) #endif /* * a directory entry and its stat info are stored here */ struct dnode { /* the basic node */ char *name; /* the dir entry name */ char *fullname; /* the dir entry name */ int allocated; struct stat dstat; /* the file stat info */ #ifdef CONFIG_SELINUX security_context_t sid; #endif struct dnode *next; /* point at the next node */ }; typedef struct dnode dnode_t; static struct dnode **list_dir(const char *); static struct dnode **dnalloc(int); static int list_single(struct dnode *); static unsigned int all_fmt; #ifdef CONFIG_FEATURE_AUTOWIDTH static int terminal_width = TERMINAL_WIDTH; static unsigned short tabstops = COLUMN_GAP; #else #define tabstops COLUMN_GAP #define terminal_width TERMINAL_WIDTH #endif static int status = EXIT_SUCCESS; static struct dnode *my_stat(char *fullname, char *name) { struct stat dstat; struct dnode *cur; #ifdef CONFIG_SELINUX security_context_t sid=NULL; #endif int rc; #ifdef CONFIG_FEATURE_LS_FOLLOWLINKS if (all_fmt & FOLLOW_LINKS) { #ifdef CONFIG_SELINUX if (is_selinux_enabled()) { rc=0; /* Set the number which means success before hand. */ rc = getfilecon(fullname,&sid); } #endif rc = stat(fullname, &dstat); if(rc) { bb_perror_msg("%s", fullname); status = EXIT_FAILURE; return 0; } } else #endif { #ifdef CONFIG_SELINUX if (is_selinux_enabled()) { rc=0; /* Set the number which means success before hand. */ rc = lgetfilecon(fullname,&sid); } #endif rc = lstat(fullname, &dstat); if(rc) { bb_perror_msg("%s", fullname); status = EXIT_FAILURE; return 0; } } cur = (struct dnode *) xmalloc(sizeof(struct dnode)); cur->fullname = fullname; cur->name = name; cur->dstat = dstat; #ifdef CONFIG_SELINUX cur->sid = sid; #endif return cur; } /*----------------------------------------------------------------------*/ #ifdef CONFIG_FEATURE_LS_COLOR static char fgcolor(mode_t mode) { /* Check wheter the file is existing (if so, color it red!) */ if (errno == ENOENT) { return '\037'; } if (LIST_EXEC && S_ISREG(mode) && (mode & (S_IXUSR | S_IXGRP | S_IXOTH))) return COLOR(0xF000); /* File is executable ... */ return COLOR(mode); } /*----------------------------------------------------------------------*/ static char bgcolor(mode_t mode) { if (LIST_EXEC && S_ISREG(mode) && (mode & (S_IXUSR | S_IXGRP | S_IXOTH))) return ATTR(0xF000); /* File is executable ... */ return ATTR(mode); } #endif /*----------------------------------------------------------------------*/ #if defined(CONFIG_FEATURE_LS_FILETYPES) || defined(CONFIG_FEATURE_LS_COLOR) static char append_char(mode_t mode) { if (!(all_fmt & LIST_FILETYPE)) return '\0'; if ((all_fmt & LIST_EXEC) && S_ISREG(mode) && (mode & (S_IXUSR | S_IXGRP | S_IXOTH))) return '*'; return APPCHAR(mode); } #endif /*----------------------------------------------------------------------*/ #define countdirs(A,B) count_dirs((A), (B), 1) #define countsubdirs(A,B) count_dirs((A), (B), 0) static int count_dirs(struct dnode **dn, int nfiles, int notsubdirs) { int i, dirs; if (dn == NULL || nfiles < 1) return (0); dirs = 0; for (i = 0; i < nfiles; i++) { if (S_ISDIR(dn[i]->dstat.st_mode) && (notsubdirs || ((dn[i]->name[0] != '.') || (dn[i]->name[1] && ((dn[i]->name[1] != '.') || dn[i]->name[2]))))) dirs++; } return (dirs); } static int countfiles(struct dnode **dnp) { int nfiles; struct dnode *cur; if (dnp == NULL) return (0); nfiles = 0; for (cur = dnp[0]; cur->next != NULL; cur = cur->next) nfiles++; nfiles++; return (nfiles); } /* get memory to hold an array of pointers */ static struct dnode **dnalloc(int num) { struct dnode **p; if (num < 1) return (NULL); p = (struct dnode **) xcalloc((size_t) num, (size_t) (sizeof(struct dnode *))); return (p); } #ifdef CONFIG_FEATURE_LS_RECURSIVE static void dfree(struct dnode **dnp) { struct dnode *cur, *next; if (dnp == NULL) return; cur = dnp[0]; while (cur != NULL) { if(cur->allocated) free(cur->fullname); /* free the filename */ next = cur->next; free(cur); /* free the dnode */ cur = next; } free(dnp); /* free the array holding the dnode pointers */ } #endif static struct dnode **splitdnarray(struct dnode **dn, int nfiles, int which) { int dncnt, i, d; struct dnode **dnp; if (dn == NULL || nfiles < 1) return (NULL); /* count how many dirs and regular files there are */ if (which == SPLIT_SUBDIR) dncnt = countsubdirs(dn, nfiles); else { dncnt = countdirs(dn, nfiles); /* assume we are looking for dirs */ if (which == SPLIT_FILE) dncnt = nfiles - dncnt; /* looking for files */ } /* allocate a file array and a dir array */ dnp = dnalloc(dncnt); /* copy the entrys into the file or dir array */ for (d = i = 0; i < nfiles; i++) { if (S_ISDIR(dn[i]->dstat.st_mode)) { if (which & (SPLIT_DIR|SPLIT_SUBDIR)) { if ((which & SPLIT_DIR) || ((dn[i]->name[0] != '.') || (dn[i]->name[1] && ((dn[i]->name[1] != '.') || dn[i]->name[2])))) { dnp[d++] = dn[i]; } } } else if (!(which & (SPLIT_DIR|SPLIT_SUBDIR))) { dnp[d++] = dn[i]; } } return (dnp); } /*----------------------------------------------------------------------*/ #ifdef CONFIG_FEATURE_LS_SORTFILES static int sortcmp(struct dnode *d1, struct dnode *d2) { unsigned int sort_opts = all_fmt & SORT_MASK; int dif; dif = 0; /* assume SORT_NAME */ if (sort_opts == SORT_SIZE) { dif = (int) (d2->dstat.st_size - d1->dstat.st_size); } else if (sort_opts == SORT_ATIME) { dif = (int) (d2->dstat.st_atime - d1->dstat.st_atime); } else if (sort_opts == SORT_CTIME) { dif = (int) (d2->dstat.st_ctime - d1->dstat.st_ctime); } else if (sort_opts == SORT_MTIME) { dif = (int) (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- may be a tie_breaker for time or size cmp */ #ifdef CONFIG_LOCALE_SUPPORT dif = strcoll(d1->name, d2->name); #else dif = strcmp(d1->name, d2->name); #endif } if (all_fmt & SORT_ORDER_REVERSE) { dif = -dif; } return (dif); } /*----------------------------------------------------------------------*/ static void shellsort(struct dnode **dn, int size) { struct dnode *temp; int gap, i, j; /* shell short the array */ if (dn == NULL || size < 2) return; for (gap = size / 2; gap > 0; gap /= 2) { for (i = gap; i < size; i++) { for (j = i - gap; j >= 0; j -= gap) { if (sortcmp(dn[j], dn[j + gap]) <= 0) break; /* they are out of order, swap them */ temp = dn[j]; dn[j] = dn[j + gap]; dn[j + gap] = temp; } } } } #endif /*----------------------------------------------------------------------*/ static void showfiles(struct dnode **dn, int nfiles) { int i, ncols, nrows, row, nc; int column = 0; int nexttab = 0; int column_width = 0; /* for STYLE_LONG and STYLE_SINGLE not used */ if (dn == NULL || nfiles < 1) return; if (all_fmt & STYLE_ONE_RECORD_FLAG) { ncols = 1; } else { /* find the longest file name- use that as the column width */ for (i = 0; i < nfiles; i++) { int len = strlen(dn[i]->name) + #ifdef CONFIG_SELINUX ((all_fmt & LIST_CONTEXT) ? 33 : 0) + #endif ((all_fmt & LIST_INO) ? 8 : 0) + ((all_fmt & LIST_BLOCKS) ? 5 : 0); if (column_width < len) column_width = len; } column_width += tabstops; 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 */ i = (nc * nrows) + row; /* assume display by column */ if (all_fmt & DISP_ROWS) i = (row * ncols) + nc; /* display across row */ if (i < nfiles) { if (column > 0) { nexttab -= column; while (nexttab--) { putchar(' '); column++; } } nexttab = column + column_width; column += list_single(dn[i]); } } putchar('\n'); column = 0; } } /*----------------------------------------------------------------------*/ static void showdirs(struct dnode **dn, int ndirs, int first) { int i, nfiles; struct dnode **subdnp; #ifdef CONFIG_FEATURE_LS_RECURSIVE int dndirs; struct dnode **dnd; #endif if (dn == NULL || ndirs < 1) return; for (i = 0; i < ndirs; i++) { if (all_fmt & (DISP_DIRNAME | DISP_RECURSIVE)) { if (!first) printf("\n"); first = 0; printf("%s:\n", dn[i]->fullname); } subdnp = list_dir(dn[i]->fullname); nfiles = countfiles(subdnp); if (nfiles > 0) { /* list all files at this level */ #ifdef CONFIG_FEATURE_LS_SORTFILES shellsort(subdnp, nfiles); #endif showfiles(subdnp, nfiles); #ifdef CONFIG_FEATURE_LS_RECURSIVE if (all_fmt & DISP_RECURSIVE) { /* recursive- list the sub-dirs */ dnd = splitdnarray(subdnp, nfiles, SPLIT_SUBDIR); dndirs = countsubdirs(subdnp, nfiles); if (dndirs > 0) { #ifdef CONFIG_FEATURE_LS_SORTFILES shellsort(dnd, dndirs); #endif showdirs(dnd, dndirs, 0); free(dnd); /* free the array of dnode pointers to the dirs */ } } dfree(subdnp); /* free the dnodes and the fullname mem */ #endif } } } /*----------------------------------------------------------------------*/ static struct dnode **list_dir(const char *path) { struct dnode *dn, *cur, **dnp; struct dirent *entry; DIR *dir; int i, nfiles; if (path == NULL) return (NULL); dn = NULL; nfiles = 0; dir = bb_opendir(path); if (dir == NULL) { status = EXIT_FAILURE; return (NULL); /* could not open the dir */ } 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] == 0 || ( entry->d_name[1] == '.' && entry->d_name[2] == 0)) && !(all_fmt & DISP_DOT)) continue; if (!(all_fmt & DISP_HIDDEN)) continue; } fullname = concat_path_file(path, entry->d_name); cur = my_stat(fullname, strrchr(fullname, '/') + 1); if (!cur) continue; cur->allocated = 1; cur->next = dn; dn = cur; nfiles++; } closedir(dir); /* now that we know how many files there are ** allocate memory for an array to hold dnode pointers */ if (dn == NULL) return (NULL); dnp = dnalloc(nfiles); for (i = 0, cur = dn; i < nfiles; i++) { dnp[i] = cur; /* save pointer to node in array */ cur = cur->next; } return (dnp); } /*----------------------------------------------------------------------*/ static int list_single(struct dnode *dn) { int i, column = 0; #ifdef CONFIG_FEATURE_LS_USERNAME char scratch[16]; #endif #ifdef CONFIG_FEATURE_LS_TIMESTAMPS char *filetime; time_t ttime, age; #endif #if defined(CONFIG_FEATURE_LS_FILETYPES) || defined (CONFIG_FEATURE_LS_COLOR) struct stat info; char append; #endif if (dn->fullname == NULL) return (0); #ifdef CONFIG_FEATURE_LS_TIMESTAMPS ttime = dn->dstat.st_mtime; /* the default time */ if (all_fmt & TIME_ACCESS) ttime = dn->dstat.st_atime; if (all_fmt & TIME_CHANGE) ttime = dn->dstat.st_ctime; filetime = ctime(&ttime); #endif #ifdef CONFIG_FEATURE_LS_FILETYPES append = append_char(dn->dstat.st_mode); #endif for (i = 0; i <= 31; i++) { switch (all_fmt & (1 << i)) { case LIST_INO: column += printf("%7ld ", (long int) dn->dstat.st_ino); break; case LIST_BLOCKS: #if _FILE_OFFSET_BITS == 64 column += printf("%4lld ", (long long)dn->dstat.st_blocks >> 1); #else column += printf("%4ld ", dn->dstat.st_blocks >> 1); #endif break; case LIST_MODEBITS: column += printf("%-10s ", (char *) bb_mode_string(dn->dstat.st_mode)); break; case LIST_NLINKS: column += printf("%4ld ", (long) dn->dstat.st_nlink); break; case LIST_ID_NAME: #ifdef CONFIG_FEATURE_LS_USERNAME bb_getpwuid(scratch, dn->dstat.st_uid, sizeof(scratch)); printf("%-8.8s ", scratch); bb_getgrgid(scratch, dn->dstat.st_gid, sizeof(scratch)); printf("%-8.8s", scratch); column += 17; break; #endif case LIST_ID_NUMERIC: column += printf("%-8d %-8d", dn->dstat.st_uid, dn->dstat.st_gid); break; case LIST_SIZE: case LIST_DEV: if (S_ISBLK(dn->dstat.st_mode) || S_ISCHR(dn->dstat.st_mode)) { column += printf("%4d, %3d ", (int) major(dn->dstat.st_rdev), (int) minor(dn->dstat.st_rdev)); } else { #ifdef CONFIG_FEATURE_HUMAN_READABLE if (all_fmt & LS_DISP_HR) { column += printf("%9s ", make_human_readable_str(dn->dstat.st_size, 1, 0)); } else #endif { #if _FILE_OFFSET_BITS == 64 column += printf("%9lld ", (long long) dn->dstat.st_size); #else column += printf("%9ld ", dn->dstat.st_size); #endif } } break; #ifdef CONFIG_FEATURE_LS_TIMESTAMPS case LIST_FULLTIME: printf("%24.24s ", filetime); column += 25; break; case LIST_DATE_TIME: if ((all_fmt & LIST_FULLTIME) == 0) { age = time(NULL) - ttime; printf("%6.6s ", filetime + 4); if (age < 3600L * 24 * 365 / 2 && age > -15 * 60) { /* hh:mm if less than 6 months old */ printf("%5.5s ", filetime + 11); } else { printf(" %4.4s ", filetime + 20); } column += 13; } break; #endif #ifdef CONFIG_SELINUX case LIST_CONTEXT: { char context[80]; int len = 0; if (dn->sid) { /* I assume sid initilized with NULL */ len = strlen(dn->sid)+1; safe_strncpy(context, dn->sid, len); freecon(dn->sid); }else { safe_strncpy(context, "unknown", 8); } printf("%-32s ", context); column += MAX(33, len); } break; #endif case LIST_FILENAME: #ifdef CONFIG_FEATURE_LS_COLOR errno = 0; if (show_color && !lstat(dn->fullname, &info)) { printf("\033[%d;%dm", bgcolor(info.st_mode), fgcolor(info.st_mode)); } #endif column += printf("%s", dn->name); #ifdef CONFIG_FEATURE_LS_COLOR if (show_color) { printf("\033[0m"); } #endif break; case LIST_SYMLINK: if (S_ISLNK(dn->dstat.st_mode)) { char *lpath = xreadlink(dn->fullname); if (lpath) { printf(" -> "); #if defined(CONFIG_FEATURE_LS_FILETYPES) || defined (CONFIG_FEATURE_LS_COLOR) if (!stat(dn->fullname, &info)) { append = append_char(info.st_mode); } #endif #ifdef CONFIG_FEATURE_LS_COLOR if (show_color) { errno = 0; printf("\033[%d;%dm", bgcolor(info.st_mode), fgcolor(info.st_mode)); } #endif column += printf("%s", lpath) + 4; #ifdef CONFIG_FEATURE_LS_COLOR if (show_color) { printf("\033[0m"); } #endif free(lpath); } } break; #ifdef CONFIG_FEATURE_LS_FILETYPES case LIST_FILETYPE: if (append != '\0') { printf("%1c", append); column++; } break; #endif } } return column; } /*----------------------------------------------------------------------*/ /* "[-]Cadil1", POSIX mandated options, busybox always supports */ /* "[-]gnsx", POSIX non-mandated options, busybox always supports */ /* "[-]Ak" GNU options, busybox always supports */ /* "[-]FLRctur", POSIX mandated options, busybox optionally supports */ /* "[-]p", POSIX non-mandated options, busybox optionally supports */ /* "[-]SXvThw", GNU options, busybox optionally supports */ /* "[-]K", SELinux mandated options, busybox optionally supports */ /* "[-]e", I think we made this one up */ #ifdef CONFIG_FEATURE_LS_TIMESTAMPS # define LS_STR_TIMESTAMPS "cetu" #else # define LS_STR_TIMESTAMPS "" #endif #ifdef CONFIG_FEATURE_LS_SORTFILES # define LS_STR_SORTFILES "SXrv" #else # define LS_STR_SORTFILES "" #endif #ifdef CONFIG_FEATURE_LS_FILETYPES # define LS_STR_FILETYPES "Fp" #else # define LS_STR_FILETYPES "" #endif #ifdef CONFIG_FEATURE_LS_FOLLOWLINKS # define LS_STR_FOLLOW_LINKS "L" #else # define LS_STR_FOLLOW_LINKS "" #endif #ifdef CONFIG_FEATURE_LS_RECURSIVE # define LS_STR_RECURSIVE "R" #else # define LS_STR_RECURSIVE "" #endif #ifdef CONFIG_FEATURE_HUMAN_READABLE # define LS_STR_HUMAN_READABLE "h" #else # define LS_STR_HUMAN_READABLE "" #endif #ifdef CONFIG_SELINUX # define LS_STR_SELINUX "K" #else # define LS_STR_SELINUX "" #endif #ifdef CONFIG_FEATURE_AUTOWIDTH # define LS_STR_AUTOWIDTH "T:w:" #else # define LS_STR_AUTOWIDTH "" #endif static const char ls_options[]="Cadil1gnsxAk" \ LS_STR_TIMESTAMPS \ LS_STR_SORTFILES \ LS_STR_FILETYPES \ LS_STR_FOLLOW_LINKS \ LS_STR_RECURSIVE \ LS_STR_HUMAN_READABLE \ LS_STR_SELINUX \ LS_STR_AUTOWIDTH; #define LIST_MASK_TRIGGER 0 #define STYLE_MASK_TRIGGER STYLE_MASK #define SORT_MASK_TRIGGER SORT_MASK #define DISP_MASK_TRIGGER DISP_ROWS #define TIME_MASK_TRIGGER TIME_MASK static const unsigned opt_flags[] = { LIST_SHORT | STYLE_COLUMNS, /* C */ DISP_HIDDEN | DISP_DOT, /* a */ DISP_NOLIST, /* d */ LIST_INO, /* i */ LIST_LONG | STYLE_LONG, /* l - remember LS_DISP_HR in mask! */ LIST_SHORT | STYLE_SINGLE, /* 1 */ 0, /* g - ingored */ LIST_ID_NUMERIC, /* n */ LIST_BLOCKS, /* s */ DISP_ROWS, /* x */ DISP_HIDDEN, /* A */ #ifdef CONFIG_SELINUX LIST_CONTEXT, /* k */ #else 0, /* k - ingored */ #endif #ifdef CONFIG_FEATURE_LS_TIMESTAMPS # ifdef CONFIG_FEATURE_LS_SORTFILES TIME_CHANGE | SORT_CTIME, /* c */ # else TIME_CHANGE, /* c */ # endif LIST_FULLTIME, /* e */ # ifdef CONFIG_FEATURE_LS_SORTFILES SORT_MTIME, /* t */ # else 0, /* t - ignored -- is this correct? */ # endif # ifdef CONFIG_FEATURE_LS_SORTFILES TIME_ACCESS | SORT_ATIME, /* u */ # else TIME_ACCESS, /* u */ # endif #endif #ifdef CONFIG_FEATURE_LS_SORTFILES SORT_SIZE, /* S */ SORT_EXT, /* X */ SORT_ORDER_REVERSE, /* r */ SORT_VERSION, /* v */ #endif #ifdef CONFIG_FEATURE_LS_FILETYPES LIST_FILETYPE | LIST_EXEC, /* F */ LIST_FILETYPE, /* p */ #endif #ifdef CONFIG_FEATURE_LS_FOLLOWLINKS FOLLOW_LINKS, /* L */ #endif #ifdef CONFIG_FEATURE_LS_RECURSIVE DISP_RECURSIVE, /* R */ #endif #ifdef CONFIG_FEATURE_HUMAN_READABLE LS_DISP_HR, /* h */ #endif #ifdef CONFIG_SELINUX LIST_MODEBITS|LIST_NLINKS|LIST_CONTEXT|LIST_SIZE|LIST_DATE_TIME, /* K */ #endif #ifdef CONFIG_FEATURE_AUTOWIDTH 0, 0, /* T, w - ignored */ #endif (1U<<31) }; /*----------------------------------------------------------------------*/ int ls_main(int argc, char **argv) { struct dnode **dnd; struct dnode **dnf; struct dnode **dnp; struct dnode *dn; struct dnode *cur; long opt; int nfiles = 0; int dnfiles; int dndirs; int oi; int ac; int i; char **av; #ifdef CONFIG_FEATURE_AUTOWIDTH char *tabstops_str = NULL; char *terminal_width_str = NULL; #endif #ifdef CONFIG_FEATURE_LS_COLOR char *color_opt; #endif all_fmt = LIST_SHORT | DISP_NORMAL | STYLE_AUTO #ifdef CONFIG_FEATURE_LS_TIMESTAMPS | TIME_MOD #endif #ifdef CONFIG_FEATURE_LS_SORTFILES | SORT_NAME | SORT_ORDER_FORWARD #endif ; #ifdef CONFIG_FEATURE_AUTOWIDTH /* Obtain the terminal width. */ get_terminal_width_height(STDOUT_FILENO, &terminal_width, NULL); /* Go one less... */ terminal_width--; #endif #ifdef CONFIG_FEATURE_LS_COLOR bb_applet_long_options = ls_color_opt; #endif /* process options */ #ifdef CONFIG_FEATURE_AUTOWIDTH opt = bb_getopt_ulflags(argc, argv, ls_options, &tabstops_str, &terminal_width_str #ifdef CONFIG_FEATURE_LS_COLOR , &color_opt #endif ); if (tabstops_str) { tabstops = atoi(tabstops_str); } if (terminal_width_str) { terminal_width = atoi(terminal_width_str); } #else opt = bb_getopt_ulflags(argc, argv, ls_options #ifdef CONFIG_FEATURE_LS_COLOR , &color_opt #endif ); #endif for (i = 0; opt_flags[i] != (1U<<31); i++) { if (opt & (1 << i)) { unsigned int flags = opt_flags[i]; if (flags & LIST_MASK_TRIGGER) { all_fmt &= ~LIST_MASK; } if (flags & STYLE_MASK_TRIGGER) { all_fmt &= ~STYLE_MASK; } #ifdef CONFIG_FEATURE_LS_SORTFILES if (flags & SORT_MASK_TRIGGER) { all_fmt &= ~SORT_MASK; } #endif if (flags & DISP_MASK_TRIGGER) { all_fmt &= ~DISP_MASK; } #ifdef CONFIG_FEATURE_LS_TIMESTAMPS if (flags & TIME_MASK_TRIGGER) { all_fmt &= ~TIME_MASK; } #endif if (flags & LIST_CONTEXT) { all_fmt |= STYLE_SINGLE; } #ifdef CONFIG_FEATURE_HUMAN_READABLE if (opt == 'l') { all_fmt &= ~LS_DISP_HR; } #endif all_fmt |= flags; } } #ifdef CONFIG_FEATURE_LS_COLOR { /* find color bit value - last position for short getopt */ #if CONFIG_FEATURE_LS_COLOR_IS_DEFAULT char *p; if ((p = getenv ("LS_COLORS")) != NULL && (*p == '\0' || (strcmp(p, "none") == 0))) { ; } else if (isatty(STDOUT_FILENO)) { show_color = 1; } #endif if((opt & (1 << i))) { /* next flag after short options */ if (color_opt == NULL || strcmp("always", color_opt) == 0) show_color = 1; else if (color_opt != NULL && strcmp("never", color_opt) == 0) show_color = 0; else if (color_opt != NULL && strcmp("auto", color_opt) == 0 && isatty(STDOUT_FILENO)) show_color = 1; } } #endif /* sort out which command line options take precedence */ #ifdef CONFIG_FEATURE_LS_RECURSIVE if (all_fmt & DISP_NOLIST) all_fmt &= ~DISP_RECURSIVE; /* no recurse if listing only dir */ #endif #if defined (CONFIG_FEATURE_LS_TIMESTAMPS) && defined (CONFIG_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; #endif if ((all_fmt & STYLE_MASK) != STYLE_LONG) /* only for long list */ all_fmt &= ~(LIST_ID_NUMERIC|LIST_FULLTIME|LIST_ID_NAME|LIST_ID_NUMERIC); #ifdef CONFIG_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 */ #endif /* choose a display format */ if ((all_fmt & STYLE_MASK) == STYLE_AUTO) #if STYLE_AUTO != 0 all_fmt = (all_fmt & ~STYLE_MASK) | (isatty(STDOUT_FILENO) ? STYLE_COLUMNS : STYLE_SINGLE); #else all_fmt |= (isatty(STDOUT_FILENO) ? STYLE_COLUMNS : STYLE_SINGLE); #endif /* * when there are no cmd line args we have to supply a default "." arg. * we will create a second argv array, "av" that will hold either * our created "." arg, or the real cmd line args. The av array * just holds the pointers- we don't move the date the pointers * point to. */ ac = argc - optind; /* how many cmd line args are left */ if (ac < 1) { static const char * const dotdir[] = { "." }; av = (char **) dotdir; ac = 1; } else { av = argv + optind; } /* now, everything is in the av array */ if (ac > 1) all_fmt |= DISP_DIRNAME; /* 2 or more items? label directories */ /* stuff the command line file names into an dnode array */ dn = NULL; for (oi = 0; oi < ac; oi++) { cur = my_stat(av[oi], av[oi]); if (!cur) continue; cur->allocated = 0; cur->next = dn; dn = cur; nfiles++; } /* now that we know how many files there are ** allocate memory for an array to hold dnode pointers */ dnp = dnalloc(nfiles); for (i = 0, cur = dn; i < nfiles; i++) { dnp[i] = cur; /* save pointer to node in array */ cur = cur->next; } if (all_fmt & DISP_NOLIST) { #ifdef CONFIG_FEATURE_LS_SORTFILES shellsort(dnp, nfiles); #endif if (nfiles > 0) showfiles(dnp, nfiles); } else { dnd = splitdnarray(dnp, nfiles, SPLIT_DIR); dnf = splitdnarray(dnp, nfiles, SPLIT_FILE); dndirs = countdirs(dnp, nfiles); dnfiles = nfiles - dndirs; if (dnfiles > 0) { #ifdef CONFIG_FEATURE_LS_SORTFILES shellsort(dnf, dnfiles); #endif showfiles(dnf, dnfiles); } if (dndirs > 0) { #ifdef CONFIG_FEATURE_LS_SORTFILES shellsort(dnd, dndirs); #endif showdirs(dnd, dndirs, dnfiles == 0); } } return (status); }