busybox/coreutils/ls.c

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/* vi: set sw=4 ts=4: */
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/*
* tiny-ls.c version 0.1.0: A minimalist 'ls'
* Copyright (C) 1996 Brian Candler <B.Candler@pobox.com>
*
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* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
* 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
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* 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:
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* 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
*
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* 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 {
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TERMINAL_WIDTH = 80, /* use 79 if terminal has linefold bug */
COLUMN_GAP = 2, /* includes the file type char */
};
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/************************************************************************/
#include <sys/types.h>
#include <sys/stat.h>
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#include <stdio.h>
#include <unistd.h>
#include <dirent.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
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#include <fcntl.h>
#include <signal.h>
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#include <termios.h>
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#include <sys/ioctl.h>
#include "busybox.h"
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#ifdef CONFIG_FEATURE_LS_TIMESTAMPS
#include <time.h>
#endif
#ifndef MAJOR
#define MAJOR(dev) (((dev)>>8)&0xff)
#define MINOR(dev) ((dev)&0xff)
#endif
/* what is the overall style of the listing */
enum {
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STYLE_AUTO = 0,
STYLE_LONG = 1, /* one record per line, extended info */
STYLE_SINGLE = 2, /* one record per line */
STYLE_COLUMNS = 3 /* fill columns */
};
/* 51306 lrwxrwxrwx 1 root root 2 May 11 01:43 /bin/view -> vi* */
/* what file information will be listed */
#define LIST_INO (1<<0)
#define LIST_BLOCKS (1<<1)
#define LIST_MODEBITS (1<<2)
#define LIST_NLINKS (1<<3)
#define LIST_ID_NAME (1<<4)
#define LIST_ID_NUMERIC (1<<5)
#define LIST_SIZE (1<<6)
#define LIST_DEV (1<<7)
#define LIST_DATE_TIME (1<<8)
#define LIST_FULLTIME (1<<9)
#define LIST_FILENAME (1<<10)
#define LIST_SYMLINK (1<<11)
#define LIST_FILETYPE (1<<12)
#define LIST_EXEC (1<<13)
/* what files will be displayed */
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#define DISP_NORMAL (0) /* show normal filenames */
#define DISP_DIRNAME (1<<0) /* 2 or more items? label directories */
#define DISP_HIDDEN (1<<1) /* show filenames starting with . */
#define DISP_DOT (1<<2) /* show . and .. */
#define DISP_NOLIST (1<<3) /* show directory as itself, not contents */
#define DISP_RECURSIVE (1<<4) /* show directory and everything below it */
#define DISP_ROWS (1<<5) /* print across rows */
#ifdef CONFIG_FEATURE_LS_SORTFILES
/* how will the files be sorted */
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static const int SORT_FORWARD = 0; /* sort in reverse order */
static const int SORT_REVERSE = 1; /* sort in reverse order */
static const int SORT_NAME = 2; /* sort by file name */
static const int SORT_SIZE = 3; /* sort by file size */
static const int SORT_ATIME = 4; /* sort by last access time */
static const int SORT_CTIME = 5; /* sort by last change time */
static const int SORT_MTIME = 6; /* sort by last modification time */
static const int SORT_VERSION = 7; /* sort by version */
static const int SORT_EXT = 8; /* sort by file name extension */
static const int SORT_DIR = 9; /* sort by file or directory */
#endif
#ifdef CONFIG_FEATURE_LS_TIMESTAMPS
/* which of the three times will be used */
static const int TIME_MOD = 0;
static const int TIME_CHANGE = 1;
static const int TIME_ACCESS = 2;
#endif
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#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)
static const int SPLIT_DIR = 0;
static const int SPLIT_FILE = 1;
static const int SPLIT_SUBDIR = 2;
#define TYPEINDEX(mode) (((mode) >> 12) & 0x0f)
#define TYPECHAR(mode) ("0pcCd?bB-?l?s???" [TYPEINDEX(mode)])
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#if defined(CONFIG_FEATURE_LS_FILETYPES) || defined(CONFIG_FEATURE_LS_COLOR)
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# define APPCHAR(mode) ("\0|\0\0/\0\0\0\0\0@\0=\0\0\0" [TYPEINDEX(mode)])
#endif
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/* colored LS support by JaWi, janwillem.janssen@lxtreme.nl */
#ifdef CONFIG_FEATURE_LS_COLOR
static int show_color = 0;
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#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
*/
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struct dnode { /* the basic node */
char *name; /* the dir entry name */
char *fullname; /* the dir entry name */
struct stat dstat; /* the file stat info */
struct dnode *next; /* point at the next node */
};
typedef struct dnode dnode_t;
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static struct dnode **list_dir(const char *);
static struct dnode **dnalloc(int);
static int list_single(struct dnode *);
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static unsigned int disp_opts;
static unsigned int style_fmt;
static unsigned int list_fmt;
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#ifdef CONFIG_FEATURE_LS_SORTFILES
static unsigned int sort_opts;
static unsigned int sort_order;
#endif
#ifdef CONFIG_FEATURE_LS_TIMESTAMPS
static unsigned int time_fmt;
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#endif
#ifdef CONFIG_FEATURE_LS_FOLLOWLINKS
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static unsigned int follow_links = FALSE;
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#endif
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#ifdef CONFIG_FEATURE_AUTOWIDTH
static unsigned short terminal_width = TERMINAL_WIDTH;
static unsigned short tabstops = COLUMN_GAP;
#else
#define tabstops COLUMN_GAP
#define terminal_width TERMINAL_WIDTH
#endif
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static int status = EXIT_SUCCESS;
#ifdef CONFIG_FEATURE_HUMAN_READABLE
static unsigned long ls_disp_hr = 0;
#endif
static struct dnode *my_stat(char *fullname, char *name)
{
struct stat dstat;
struct dnode *cur;
#ifdef CONFIG_FEATURE_LS_FOLLOWLINKS
if (follow_links) {
if (stat(fullname, &dstat)) {
perror_msg("%s", fullname);
status = EXIT_FAILURE;
return 0;
}
} else
#endif
if (lstat(fullname, &dstat)) {
perror_msg("%s", fullname);
status = EXIT_FAILURE;
return 0;
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}
cur = (struct dnode *) xmalloc(sizeof(struct dnode));
cur->fullname = fullname;
cur->name = name;
cur->dstat = dstat;
return cur;
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}
/*----------------------------------------------------------------------*/
#ifdef CONFIG_FEATURE_LS_COLOR
static char fgcolor(mode_t mode)
{
/* Check wheter the file is existing (if so, color it red!) */
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if (errno == ENOENT) {
return '\037';
}
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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)
{
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if (LIST_EXEC && S_ISREG(mode)
&& (mode & (S_IXUSR | S_IXGRP | S_IXOTH)))
return ATTR(0xF000); /* File is executable ... */
return ATTR(mode);
}
#endif
/*----------------------------------------------------------------------*/
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#if defined(CONFIG_FEATURE_LS_FILETYPES) || defined(CONFIG_FEATURE_LS_COLOR)
static char append_char(mode_t mode)
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{
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if (!(list_fmt & LIST_FILETYPE))
return '\0';
if ((list_fmt & LIST_EXEC) && S_ISREG(mode)
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&& (mode & (S_IXUSR | S_IXGRP | S_IXOTH)))
return '*';
return APPCHAR(mode);
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}
#endif
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/*----------------------------------------------------------------------*/
static int is_subdir(struct dnode *dn)
{
return (S_ISDIR(dn->dstat.st_mode) && strcmp(dn->name, ".") != 0 &&
strcmp(dn->name, "..") != 0);
}
static int countdirs(struct dnode **dn, int nfiles)
{
int i, dirs;
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if (dn == NULL || nfiles < 1)
return (0);
dirs = 0;
for (i = 0; i < nfiles; i++) {
if (S_ISDIR(dn[i]->dstat.st_mode))
dirs++;
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}
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return (dirs);
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}
static int countsubdirs(struct dnode **dn, int nfiles)
{
int i, subdirs;
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if (dn == NULL || nfiles < 1)
return 0;
subdirs = 0;
for (i = 0; i < nfiles; i++)
if (is_subdir(dn[i]))
subdirs++;
return subdirs;
}
static int countfiles(struct dnode **dnp)
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{
int nfiles;
struct dnode *cur;
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if (dnp == NULL)
return (0);
nfiles = 0;
for (cur = dnp[0]; cur->next != NULL; cur = cur->next)
nfiles++;
nfiles++;
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return (nfiles);
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}
/* get memory to hold an array of pointers */
static struct dnode **dnalloc(int num)
{
struct dnode **p;
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if (num < 1)
return (NULL);
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p = (struct dnode **) xcalloc((size_t) num,
(size_t) (sizeof(struct dnode *)));
return (p);
}
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#ifdef CONFIG_FEATURE_LS_RECURSIVE
static void dfree(struct dnode **dnp)
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{
struct dnode *cur, *next;
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if (dnp == NULL)
return;
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cur = dnp[0];
while (cur != NULL) {
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free(cur->fullname); /* free the filename */
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next = cur->next;
free(cur); /* free the dnode */
cur = next;
}
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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;
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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 {
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dncnt = countdirs(dn, nfiles); /* assume we are looking for dirs */
if (which == SPLIT_FILE)
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dncnt = nfiles - dncnt; /* looking for files */
}
/* allocate a file array and a dir array */
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dnp = dnalloc(dncnt);
/* copy the entrys into the file or dir array */
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for (d = i = 0; i < nfiles; i++) {
if (which == SPLIT_DIR) {
if (S_ISDIR(dn[i]->dstat.st_mode)) {
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dnp[d++] = dn[i];
} /* else skip the file */
} else if (which == SPLIT_SUBDIR) {
if (is_subdir(dn[i])) {
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dnp[d++] = dn[i];
} /* else skip the file or dir */
} else {
if (!(S_ISDIR(dn[i]->dstat.st_mode))) {
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dnp[d++] = dn[i];
} /* else skip the dir */
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}
}
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return (dnp);
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}
/*----------------------------------------------------------------------*/
#ifdef CONFIG_FEATURE_LS_SORTFILES
static int sortcmp(struct dnode *d1, struct dnode *d2)
{
int cmp, dif;
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cmp = 0;
if (sort_opts == SORT_SIZE) {
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dif = (int) (d1->dstat.st_size - d2->dstat.st_size);
} else if (sort_opts == SORT_ATIME) {
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dif = (int) (d1->dstat.st_atime - d2->dstat.st_atime);
} else if (sort_opts == SORT_CTIME) {
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dif = (int) (d1->dstat.st_ctime - d2->dstat.st_ctime);
} else if (sort_opts == SORT_MTIME) {
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dif = (int) (d1->dstat.st_mtime - d2->dstat.st_mtime);
} else if (sort_opts == SORT_DIR) {
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dif = S_ISDIR(d1->dstat.st_mode) - S_ISDIR(d2->dstat.st_mode);
/* } else if (sort_opts == SORT_VERSION) { */
/* } else if (sort_opts == SORT_EXT) { */
} else { /* assume SORT_NAME */
dif = 0;
}
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if (dif > 0)
cmp = -1;
if (dif < 0)
cmp = 1;
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
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dif = strcmp(d1->name, d2->name);
#endif
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if (dif > 0)
cmp = 1;
if (dif < 0)
cmp = -1;
}
if (sort_order == SORT_REVERSE) {
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cmp = -1 * cmp;
}
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return (cmp);
}
/*----------------------------------------------------------------------*/
static void shellsort(struct dnode **dn, int size)
{
struct dnode *temp;
int gap, i, j;
/* shell short the array */
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if (dn == NULL || size < 2)
return;
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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 */
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temp = dn[j];
dn[j] = dn[j + gap];
dn[j + gap] = temp;
}
}
}
}
#endif
/*----------------------------------------------------------------------*/
static void showfiles(struct dnode **dn, int nfiles)
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{
int i, ncols, nrows, row, nc;
int column = 0;
int nexttab = 0;
int column_width = 0; /* for STYLE_LONG and STYLE_SINGLE not used */
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if (dn == NULL || nfiles < 1)
return;
switch (style_fmt) {
case STYLE_LONG: /* one record per line, extended info */
case STYLE_SINGLE: /* one record per line */
ncols = 1;
break;
default:
/* find the longest file name- use that as the column width */
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for (i = 0; i < nfiles; i++) {
int len = strlen(dn[i]->name) +
((list_fmt & LIST_INO) ? 8 : 0) +
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((list_fmt & LIST_BLOCKS) ? 5 : 0);
if (column_width < len)
column_width = len;
}
column_width += tabstops;
ncols = (int) (terminal_width / column_width);
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}
if (ncols > 1) {
nrows = nfiles / ncols;
if ((nrows * ncols) < nfiles)
nrows++; /* round up fractionals */
} else {
nrows = nfiles;
ncols = 1;
}
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for (row = 0; row < nrows; row++) {
for (nc = 0; nc < ncols; nc++) {
/* reach into the array based on the column and row */
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i = (nc * nrows) + row; /* assume display by column */
if (disp_opts & DISP_ROWS)
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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;
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}
}
/*----------------------------------------------------------------------*/
static void showdirs(struct dnode **dn, int ndirs)
{
int i, nfiles;
struct dnode **subdnp;
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#ifdef CONFIG_FEATURE_LS_RECURSIVE
int dndirs;
struct dnode **dnd;
#endif
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if (dn == NULL || ndirs < 1)
return;
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for (i = 0; i < ndirs; i++) {
if (disp_opts & (DISP_DIRNAME | DISP_RECURSIVE)) {
printf("\n%s:\n", dn[i]->fullname);
}
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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 (disp_opts & DISP_RECURSIVE) {
/* recursive- list the sub-dirs */
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dnd = splitdnarray(subdnp, nfiles, SPLIT_SUBDIR);
dndirs = countsubdirs(subdnp, nfiles);
if (dndirs > 0) {
#ifdef CONFIG_FEATURE_LS_SORTFILES
shellsort(dnd, dndirs);
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#endif
showdirs(dnd, dndirs);
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free(dnd); /* free the array of dnode pointers to the dirs */
}
}
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dfree(subdnp); /* free the dnodes and the fullname mem */
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#endif
}
}
}
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/*----------------------------------------------------------------------*/
static struct dnode **list_dir(const char *path)
{
struct dnode *dn, *cur, **dnp;
struct dirent *entry;
DIR *dir;
int i, nfiles;
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if (path == NULL)
return (NULL);
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dn = NULL;
nfiles = 0;
dir = opendir(path);
if (dir == NULL) {
perror_msg("%s", path);
status = EXIT_FAILURE;
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return (NULL); /* could not open the dir */
}
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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))
&& !(disp_opts & DISP_DOT))
continue;
if (!(disp_opts & DISP_HIDDEN))
continue;
}
fullname = concat_path_file(path, entry->d_name);
cur = my_stat(fullname, strrchr(fullname, '/') + 1);
if (!cur)
continue;
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cur->next = dn;
dn = cur;
nfiles++;
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}
closedir(dir);
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/* now that we know how many files there are
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** allocate memory for an array to hold dnode pointers
*/
if (dn == NULL)
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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;
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}
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return (dnp);
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}
/*----------------------------------------------------------------------*/
static int list_single(struct dnode *dn)
{
int i, column = 0;
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#ifdef CONFIG_FEATURE_LS_USERNAME
char scratch[16];
#endif
#ifdef CONFIG_FEATURE_LS_TIMESTAMPS
char *filetime;
time_t ttime, age;
#endif
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#if defined(CONFIG_FEATURE_LS_FILETYPES) || defined (CONFIG_FEATURE_LS_COLOR)
struct stat info;
char append;
#endif
if (dn->fullname == NULL)
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return (0);
#ifdef CONFIG_FEATURE_LS_TIMESTAMPS
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ttime = dn->dstat.st_mtime; /* the default time */
if (time_fmt & TIME_ACCESS)
ttime = dn->dstat.st_atime;
if (time_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
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for (i = 0; i <= 31; i++) {
switch (list_fmt & (1 << i)) {
case LIST_INO:
column += printf("%7ld ", (long int) dn->dstat.st_ino);
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break;
case LIST_BLOCKS:
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#if _FILE_OFFSET_BITS == 64
column += printf("%4lld ", dn->dstat.st_blocks >> 1);
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#else
column += printf("%4ld ", dn->dstat.st_blocks >> 1);
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#endif
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break;
case LIST_MODEBITS:
column += printf("%-10s ", (char *) mode_string(dn->dstat.st_mode));
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break;
case LIST_NLINKS:
column += printf("%4ld ", (long) dn->dstat.st_nlink);
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break;
case LIST_ID_NAME:
#ifdef CONFIG_FEATURE_LS_USERNAME
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my_getpwuid(scratch, dn->dstat.st_uid);
printf("%-8.8s ", scratch);
my_getgrgid(scratch, dn->dstat.st_gid);
printf("%-8.8s", scratch);
column += 17;
break;
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#endif
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case LIST_ID_NUMERIC:
column += printf("%-8d %-8d", dn->dstat.st_uid, dn->dstat.st_gid);
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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),
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(int) MINOR(dn->dstat.st_rdev));
} else {
#ifdef CONFIG_FEATURE_HUMAN_READABLE
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if (ls_disp_hr == TRUE) {
column += printf("%9s ",
make_human_readable_str(dn->dstat.st_size, 1, 0));
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} else
#endif
{
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#if _FILE_OFFSET_BITS == 64
column += printf("%9lld ", (long long) dn->dstat.st_size);
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#else
column += printf("%9ld ", dn->dstat.st_size);
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#endif
}
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}
break;
#ifdef CONFIG_FEATURE_LS_TIMESTAMPS
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case LIST_FULLTIME:
case LIST_DATE_TIME:
if (list_fmt & LIST_FULLTIME) {
printf("%24.24s ", filetime);
column += 25;
break;
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}
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
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case LIST_FILENAME:
#ifdef CONFIG_FEATURE_LS_COLOR
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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
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if (show_color) {
printf("\033[0m");
}
#endif
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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
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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
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if (show_color) {
printf("\033[0m");
}
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#endif
free(lpath);
}
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}
break;
#ifdef CONFIG_FEATURE_LS_FILETYPES
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case LIST_FILETYPE:
if (append != '\0') {
printf("%1c", append);
column++;
}
break;
#endif
}
}
return column;
}
/*----------------------------------------------------------------------*/
extern int ls_main(int argc, char **argv)
{
struct dnode **dnf, **dnd;
int dnfiles, dndirs;
struct dnode *dn, *cur, **dnp;
int i, nfiles;
int opt;
int oi, ac;
char **av;
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#ifdef CONFIG_FEATURE_AUTOWIDTH
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struct winsize win = { 0, 0, 0, 0 };
#endif
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disp_opts = DISP_NORMAL;
style_fmt = STYLE_AUTO;
list_fmt = LIST_SHORT;
#ifdef CONFIG_FEATURE_LS_SORTFILES
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sort_opts = SORT_NAME;
sort_order = SORT_FORWARD;
#endif
#ifdef CONFIG_FEATURE_LS_TIMESTAMPS
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time_fmt = TIME_MOD;
#endif
#ifdef CONFIG_FEATURE_AUTOWIDTH
ioctl(fileno(stdout), TIOCGWINSZ, &win);
if (win.ws_col > 0)
terminal_width = win.ws_col - 1;
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#endif
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nfiles = 0;
#ifdef CONFIG_FEATURE_LS_COLOR
if (isatty(fileno(stdout)))
show_color = 1;
#endif
/* process options */
while ((opt = getopt(argc, argv, "1AaCdgilnsx"
#ifdef CONFIG_FEATURE_AUTOWIDTH
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"T:w:"
#endif
#ifdef CONFIG_FEATURE_LS_FILETYPES
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"Fp"
#endif
#ifdef CONFIG_FEATURE_LS_RECURSIVE
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"R"
#endif
#ifdef CONFIG_FEATURE_LS_SORTFILES
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"rSvX"
#endif
#ifdef CONFIG_FEATURE_LS_TIMESTAMPS
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"cetu"
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#endif
#ifdef CONFIG_FEATURE_LS_FOLLOWLINKS
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"L"
#endif
#ifdef CONFIG_FEATURE_HUMAN_READABLE
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"h"
#endif
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"k")) > 0) {
switch (opt) {
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case '1':
style_fmt = STYLE_SINGLE;
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list_fmt = LIST_SHORT;
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break;
case 'A':
disp_opts |= DISP_HIDDEN;
break;
case 'a':
disp_opts |= DISP_HIDDEN | DISP_DOT;
break;
case 'C':
style_fmt = STYLE_COLUMNS;
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list_fmt = LIST_SHORT;
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break;
case 'd':
disp_opts |= DISP_NOLIST;
break;
case 'g': /* ignore -- for ftp servers */
break;
case 'i':
list_fmt |= LIST_INO;
break;
case 'l':
style_fmt = STYLE_LONG;
list_fmt |= LIST_LONG;
#ifdef CONFIG_FEATURE_HUMAN_READABLE
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ls_disp_hr = FALSE;
#endif
break;
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case 'n':
list_fmt |= LIST_ID_NUMERIC;
break;
case 's':
list_fmt |= LIST_BLOCKS;
break;
case 'x':
disp_opts = DISP_ROWS;
break;
#ifdef CONFIG_FEATURE_LS_FILETYPES
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case 'F':
list_fmt |= LIST_FILETYPE | LIST_EXEC;
break;
case 'p':
list_fmt |= LIST_FILETYPE;
break;
#endif
#ifdef CONFIG_FEATURE_LS_RECURSIVE
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case 'R':
disp_opts |= DISP_RECURSIVE;
break;
#endif
#ifdef CONFIG_FEATURE_LS_SORTFILES
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case 'r':
sort_order |= SORT_REVERSE;
break;
case 'S':
sort_opts = SORT_SIZE;
break;
case 'v':
sort_opts = SORT_VERSION;
break;
case 'X':
sort_opts = SORT_EXT;
break;
#endif
#ifdef CONFIG_FEATURE_LS_TIMESTAMPS
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case 'e':
list_fmt |= LIST_FULLTIME;
break;
case 'c':
time_fmt = TIME_CHANGE;
#ifdef CONFIG_FEATURE_LS_SORTFILES
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sort_opts = SORT_CTIME;
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#endif
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break;
case 'u':
time_fmt = TIME_ACCESS;
#ifdef CONFIG_FEATURE_LS_SORTFILES
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sort_opts = SORT_ATIME;
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#endif
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break;
case 't':
#ifdef CONFIG_FEATURE_LS_SORTFILES
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sort_opts = SORT_MTIME;
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#endif
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break;
#endif
#ifdef CONFIG_FEATURE_LS_FOLLOWLINKS
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case 'L':
follow_links = TRUE;
break;
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#endif
#ifdef CONFIG_FEATURE_AUTOWIDTH
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case 'T':
tabstops = atoi(optarg);
break;
case 'w':
terminal_width = atoi(optarg);
break;
#endif
#ifdef CONFIG_FEATURE_HUMAN_READABLE
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case 'h':
ls_disp_hr = TRUE;
break;
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#endif
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case 'k':
break;
default:
goto print_usage_message;
}
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}
/* sort out which command line options take precedence */
#ifdef CONFIG_FEATURE_LS_RECURSIVE
if (disp_opts & DISP_NOLIST)
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disp_opts &= ~DISP_RECURSIVE; /* no recurse if listing only dir */
#endif
#if defined (CONFIG_FEATURE_LS_TIMESTAMPS) && defined (CONFIG_FEATURE_LS_SORTFILES)
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if (time_fmt & TIME_CHANGE)
sort_opts = SORT_CTIME;
if (time_fmt & TIME_ACCESS)
sort_opts = SORT_ATIME;
#endif
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if (style_fmt != STYLE_LONG) /* only for long list */
list_fmt &= ~(LIST_ID_NUMERIC|LIST_FULLTIME|LIST_ID_NAME|LIST_ID_NUMERIC);
#ifdef CONFIG_FEATURE_LS_USERNAME
if (style_fmt == STYLE_LONG && (list_fmt & LIST_ID_NUMERIC))
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list_fmt &= ~LIST_ID_NAME; /* don't list names if numeric uid */
#endif
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/* choose a display format */
if (style_fmt == STYLE_AUTO)
style_fmt = isatty(fileno(stdout)) ? STYLE_COLUMNS : STYLE_SINGLE;
/*
* 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.
*/
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ac = argc - optind; /* how many cmd line args are left */
if (ac < 1) {
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av = (char **) xcalloc((size_t) 1, (size_t) (sizeof(char *)));
av[0] = xstrdup(".");
ac = 1;
} else {
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av = (char **) xcalloc((size_t) ac, (size_t) (sizeof(char *)));
for (oi = 0; oi < ac; oi++) {
av[oi] = argv[optind++]; /* copy pointer to real cmd line arg */
}
}
/* now, everything is in the av array */
if (ac > 1)
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disp_opts |= DISP_DIRNAME; /* 2 or more items? label directories */
/* stuff the command line file names into an dnode array */
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dn = NULL;
for (oi = 0; oi < ac; oi++) {
char *fullname = xstrdup(av[oi]);
cur = my_stat(fullname, fullname);
if (!cur)
continue;
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cur->next = dn;
dn = cur;
nfiles++;
}
/* now that we know how many files there are
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** 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;
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}
if (disp_opts & DISP_NOLIST) {
#ifdef CONFIG_FEATURE_LS_SORTFILES
shellsort(dnp, nfiles);
#endif
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if (nfiles > 0)
showfiles(dnp, nfiles);
} else {
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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);
}
}
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return (status);
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print_usage_message:
show_usage();
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}