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busybox/coreutils/ls.c
Rob Landley 2631486f1b Patch from Shaun Jackman: 
ls has an ugly bug. ls uses an array of pointers, the elements of
which are all in a linked list. To free the elements, instead of
freeing all the elements in the array, array[0..nelements], it frees
by iterating the linked list starting at array[0], which it assumes is
the head of the list. Unfortunately, ls also sorts the array! So,
array[0] is no longer the head, but somewhere in the middle of the
linked list. This patch fixes this bug, and also adds an
ENABLE_FEATURE_CLEAN_UP stanza.
2006-05-02 19:46:52 +00:00

1168 lines
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/* 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, int nfiles)
{
int i;
if (dnp == NULL)
return;
for (i = 0; i < nfiles; i++) {
struct dnode *cur = dnp[i];
if(cur->allocated)
free(cur->fullname); /* free the filename */
free(cur); /* free the dnode */
}
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, nfiles); /* 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 (ENABLE_FEATURE_CLEAN_UP)
free(dnf);
}
if (dndirs > 0) {
#ifdef CONFIG_FEATURE_LS_SORTFILES
shellsort(dnd, dndirs);
#endif
showdirs(dnd, dndirs, dnfiles == 0);
if (ENABLE_FEATURE_CLEAN_UP)
free(dnd);
}
}
if (ENABLE_FEATURE_CLEAN_UP)
dfree(dnp, nfiles);
return (status);
}
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