busybox/ls.c
Eric Andersen 958c78f9a1 Apply a patch from Matt Kraai:
"The -L option to ls doesn't behave correctly for files listed explicitly
    on the command line, only those in directories that are listed.  The
    appended patch fixes this problem.  Would someone please commit it?"
 -Erik
2000-10-09 17:51:25 +00:00

855 lines
23 KiB
C

/* 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>
*
* 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
* 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?
*/
#define TERMINAL_WIDTH 80 /* use 79 if your terminal has linefold bug */
#define COLUMN_WIDTH 14 /* default if AUTOWIDTH not defined */
#define COLUMN_GAP 2 /* includes the file type char, if present */
/************************************************************************/
#include "busybox.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
#include <unistd.h>
#include <dirent.h>
#include <errno.h>
#include <stdio.h>
#ifdef BB_FEATURE_LS_TIMESTAMPS
#include <time.h>
#endif
#include <string.h>
#ifndef NAJOR
#define MAJOR(dev) (((dev)>>8)&0xff)
#define MINOR(dev) ((dev)&0xff)
#endif
/* what is the overall style of the listing */
#define STYLE_AUTO 0
#define STYLE_LONG 1 /* one record per line, extended info */
#define STYLE_SINGLE 2 /* one record per line */
#define 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 */
#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 BB_FEATURE_LS_SORTFILES
/* how will the files be sorted */
#define SORT_FORWARD 0 /* sort in reverse order */
#define SORT_REVERSE 1 /* sort in reverse order */
#define SORT_NAME 2 /* sort by file name */
#define SORT_SIZE 3 /* sort by file size */
#define SORT_ATIME 4 /* sort by last access time */
#define SORT_CTIME 5 /* sort by last change time */
#define SORT_MTIME 6 /* sort by last modification time */
#define SORT_VERSION 7 /* sort by version */
#define SORT_EXT 8 /* sort by file name extension */
#define SORT_DIR 9 /* sort by file or directory */
#endif
#ifdef BB_FEATURE_LS_TIMESTAMPS
/* which of the three times will be used */
#define TIME_MOD 0
#define TIME_CHANGE 1
#define TIME_ACCESS 2
#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 0
#define SPLIT_FILE 1
#define TYPEINDEX(mode) (((mode) >> 12) & 0x0f)
#define TYPECHAR(mode) ("0pcCd?bB-?l?s???" [TYPEINDEX(mode)])
#ifdef BB_FEATURE_LS_FILETYPES
#define APPCHAR(mode) ("\0|\0\0/\0\0\0\0\0@\0=\0\0\0" [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 */
struct stat dstat; /* the file stat info */
struct dnode *next; /* point at the next node */
};
typedef struct dnode dnode_t;
struct dnode **list_dir(char *);
struct dnode **dnalloc(int);
int list_single(struct dnode *);
static unsigned int disp_opts= DISP_NORMAL;
static unsigned int style_fmt= STYLE_AUTO ;
static unsigned int list_fmt= LIST_SHORT ;
#ifdef BB_FEATURE_LS_SORTFILES
static unsigned int sort_opts= SORT_FORWARD;
static unsigned int sort_order= SORT_FORWARD;
#endif
#ifdef BB_FEATURE_LS_TIMESTAMPS
static unsigned int time_fmt= TIME_MOD;
#endif
#ifdef BB_FEATURE_LS_FOLLOWLINKS
static unsigned int follow_links=FALSE;
#endif
static unsigned short column = 0;
#ifdef BB_FEATURE_AUTOWIDTH
static unsigned short terminal_width = TERMINAL_WIDTH;
static unsigned short column_width = COLUMN_WIDTH;
static unsigned short tabstops = 8;
#else
#define terminal_width TERMINAL_WIDTH
#define column_width COLUMN_WIDTH
#endif
static void newline(void)
{
if (column > 0) {
fprintf(stdout, "\n");
column = 0;
}
}
/*----------------------------------------------------------------------*/
#ifdef BB_FEATURE_LS_FILETYPES
static char append_char(mode_t mode)
{
if ( !(list_fmt & LIST_FILETYPE))
return '\0';
if ((list_fmt & LIST_EXEC) && S_ISREG(mode)
&& (mode & (S_IXUSR | S_IXGRP | S_IXOTH))) return '*';
return APPCHAR(mode);
}
#endif
/*----------------------------------------------------------------------*/
static void nexttabstop( void )
{
static short nexttab= 0;
int n=0;
if (column > 0) {
n= nexttab - column;
if (n < 1) n= 1;
while (n--) {
fprintf(stdout, " ");
column++;
}
}
nexttab= column + column_width + COLUMN_GAP ;
}
/*----------------------------------------------------------------------*/
int countdirs(struct dnode **dn, int nfiles)
{
int i, dirs;
/* count how many dirs and regular files there are */
if (dn==NULL || nfiles < 1) return(0);
dirs= 0;
for (i=0; i<nfiles; i++) {
if (S_ISDIR(dn[i]->dstat.st_mode)) dirs++;
}
return(dirs);
}
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 */
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);
}
void dfree(struct dnode **dnp)
{
struct dnode *cur, *next;
if(dnp == NULL) return;
cur=dnp[0];
while (cur != NULL) {
if (cur->fullname != NULL) 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 */
}
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 */
dncnt= countdirs(dn, nfiles); /* assume we are looking for dirs */
if (which != SPLIT_DIR)
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 (which == SPLIT_DIR) {
if (S_ISDIR(dn[i]->dstat.st_mode)) {
dnp[d++]= dn[i];
} /* else skip the file */
} else {
if (!(S_ISDIR(dn[i]->dstat.st_mode))) {
dnp[d++]= dn[i];
} /* else skip the dir */
}
}
return(dnp);
}
/*----------------------------------------------------------------------*/
#ifdef BB_FEATURE_LS_SORTFILES
int sortcmp(struct dnode *d1, struct dnode *d2)
{
int cmp, dif;
cmp= 0;
if (sort_opts == SORT_SIZE) {
dif= (int)(d1->dstat.st_size - d2->dstat.st_size);
} else if (sort_opts == SORT_ATIME) {
dif= (int)(d1->dstat.st_atime - d2->dstat.st_atime);
} else if (sort_opts == SORT_CTIME) {
dif= (int)(d1->dstat.st_ctime - d2->dstat.st_ctime);
} else if (sort_opts == SORT_MTIME) {
dif= (int)(d1->dstat.st_mtime - d2->dstat.st_mtime);
} else if (sort_opts == SORT_DIR) {
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;
}
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 */
dif= strcmp(d1->name, d2->name);
if (dif > 0) cmp= 1;
if (dif < 0) cmp= -1;
}
if (sort_order == SORT_REVERSE) {
cmp= -1 * cmp;
}
return(cmp);
}
/*----------------------------------------------------------------------*/
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
/*----------------------------------------------------------------------*/
void showfiles(struct dnode **dn, int nfiles)
{
int i, ncols, nrows, row, nc;
#ifdef BB_FEATURE_AUTOWIDTH
int len;
#endif
if(dn==NULL || nfiles < 1) return;
#ifdef BB_FEATURE_AUTOWIDTH
/* find the longest file name- use that as the column width */
column_width= 0;
for (i=0; i<nfiles; i++) {
len= strlen(dn[i]->name) +
((list_fmt & LIST_INO) ? 8 : 0) +
((list_fmt & LIST_BLOCKS) ? 5 : 0)
;
if (column_width < len) column_width= len;
}
#endif
ncols= (int)(terminal_width / (column_width + COLUMN_GAP));
switch (style_fmt) {
case STYLE_LONG: /* one record per line, extended info */
case STYLE_SINGLE: /* one record per line */
ncols= 1;
break;
}
nrows= nfiles / ncols;
if ((nrows * ncols) < nfiles) nrows++; /* round up fractionals */
if (nrows > nfiles) nrows= nfiles;
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 (disp_opts & DISP_ROWS)
i= (row * ncols) + nc; /* display across row */
if (i < nfiles) {
nexttabstop();
list_single(dn[i]);
}
}
newline();
}
}
/*----------------------------------------------------------------------*/
void showdirs(struct dnode **dn, int ndirs)
{
int i, nfiles;
struct dnode **subdnp;
#ifdef BB_FEATURE_LS_SORTFILES
int dndirs;
struct dnode **dnd;
#endif
if (dn==NULL || ndirs < 1) return;
for (i=0; i<ndirs; i++) {
if (disp_opts & (DISP_DIRNAME | DISP_RECURSIVE)) {
fprintf(stdout, "\n%s:\n", dn[i]->fullname);
}
subdnp= list_dir(dn[i]->fullname);
nfiles= countfiles(subdnp);
if (nfiles > 0) {
/* list all files at this level */
#ifdef BB_FEATURE_LS_SORTFILES
shellsort(subdnp, nfiles);
#endif
showfiles(subdnp, nfiles);
#ifdef BB_FEATURE_LS_RECURSIVE
if (disp_opts & DISP_RECURSIVE) {
/* recursive- list the sub-dirs */
dnd= splitdnarray(subdnp, nfiles, SPLIT_DIR);
dndirs= countdirs(subdnp, nfiles);
if (dndirs > 0) {
shellsort(dnd, dndirs);
showdirs(dnd, dndirs);
free(dnd); /* free the array of dnode pointers to the dirs */
}
}
dfree(subdnp); /* free the dnodes and the fullname mem */
#endif
}
}
}
/*----------------------------------------------------------------------*/
struct dnode **list_dir(char *path)
{
struct dnode *dn, *cur, **dnp;
struct dirent *entry;
DIR *dir;
char *fnend, fullname[BUFSIZ+1] ;
int i, nfiles;
if (path==NULL) return(NULL);
strcpy(fullname, path);
fnend = fullname + strlen(fullname);
if (fnend[-1] != '/') {
strcat(fullname, "/");
fnend++;
}
dn= NULL;
nfiles= 0;
dir = opendir(fullname);
if (dir == NULL) {
errorMsg("%s: %s\n", fullname, strerror(errno));
return(NULL); /* could not open the dir */
}
while ((entry = readdir(dir)) != NULL) {
/* are we going to list the file- it may be . or .. or a hidden file */
strcpy(fnend, entry->d_name);
if ((strcmp(fnend, ".")==0) && !(disp_opts & DISP_DOT)) continue;
if ((strcmp(fnend, "..")==0) && !(disp_opts & DISP_DOT)) continue;
if ((fnend[0] == '.') && !(disp_opts & DISP_HIDDEN)) continue;
cur= (struct dnode *)xmalloc(sizeof(struct dnode));
cur->fullname= xstrdup(fullname);
cur->name= cur->fullname + (int)(fnend - fullname) ;
#ifdef BB_FEATURE_LS_FOLLOWLINKS
if (follow_links == TRUE) {
if (stat(fullname, &cur->dstat)) {
errorMsg("%s: %s\n", fullname, strerror(errno));
free(cur->fullname);
free(cur);
continue;
}
} else
#endif
if (lstat(fullname, &cur->dstat)) { /* get file stat info into node */
errorMsg("%s: %s\n", fullname, strerror(errno));
free(cur->fullname);
free(cur);
continue;
}
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 (nfiles < 1) 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);
}
/*----------------------------------------------------------------------*/
int list_single(struct dnode *dn)
{
int i, len;
char scratch[BUFSIZ + 1];
#ifdef BB_FEATURE_LS_TIMESTAMPS
char *filetime;
time_t ttime, age;
#endif
#ifdef BB_FEATURE_LS_FILETYPES
struct stat info;
char append;
#endif
if (dn==NULL || dn->fullname==NULL) return(0);
#ifdef BB_FEATURE_LS_TIMESTAMPS
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 BB_FEATURE_LS_FILETYPES
append = append_char(dn->dstat.st_mode);
#endif
for (i=0; i<=31; i++) {
switch (list_fmt & (1<<i)) {
case LIST_INO:
fprintf(stdout, "%7ld ", dn->dstat.st_ino);
column += 8;
break;
case LIST_BLOCKS:
#if _FILE_OFFSET_BITS == 64
fprintf(stdout, "%4lld ", dn->dstat.st_blocks>>1);
#else
fprintf(stdout, "%4ld ", dn->dstat.st_blocks>>1);
#endif
column += 5;
break;
case LIST_MODEBITS:
fprintf(stdout, "%10s", (char *)modeString(dn->dstat.st_mode));
column += 10;
break;
case LIST_NLINKS:
fprintf(stdout, "%4d ", dn->dstat.st_nlink);
column += 10;
break;
case LIST_ID_NAME:
#ifdef BB_FEATURE_LS_USERNAME
{
memset(&info, 0, sizeof(struct stat));
memset(scratch, 0, sizeof(scratch));
if (!stat(dn->fullname, &info)) {
my_getpwuid(scratch, info.st_uid);
}
if (*scratch) {
fprintf(stdout, "%-8.8s ", scratch);
} else {
fprintf(stdout, "%-8d ", dn->dstat.st_uid);
}
memset(scratch, 0, sizeof(scratch));
if (info.st_ctime != 0) {
my_getgrgid(scratch, info.st_gid);
}
if (*scratch) {
fprintf(stdout, "%-8.8s", scratch);
} else {
fprintf(stdout, "%-8d", dn->dstat.st_gid);
}
column += 17;
}
break;
#endif
case LIST_ID_NUMERIC:
fprintf(stdout, "%-8d %-8d", dn->dstat.st_uid, dn->dstat.st_gid);
column += 17;
break;
case LIST_SIZE:
case LIST_DEV:
if (S_ISBLK(dn->dstat.st_mode) || S_ISCHR(dn->dstat.st_mode)) {
fprintf(stdout, "%4d, %3d ", (int)MAJOR(dn->dstat.st_rdev), (int)MINOR(dn->dstat.st_rdev));
} else {
#if _FILE_OFFSET_BITS == 64
fprintf(stdout, "%9lld ", dn->dstat.st_size);
#else
fprintf(stdout, "%9ld ", dn->dstat.st_size);
#endif
}
column += 10;
break;
#ifdef BB_FEATURE_LS_TIMESTAMPS
case LIST_FULLTIME:
case LIST_DATE_TIME:
if (list_fmt & LIST_FULLTIME) {
fprintf(stdout, "%24.24s ", filetime);
column += 25;
break;
}
age = time(NULL) - ttime;
fprintf(stdout, "%6.6s ", filetime+4);
if (age < 3600L * 24 * 365 / 2 && age > -15 * 60) {
/* hh:mm if less than 6 months old */
fprintf(stdout, "%5.5s ", filetime+11);
} else {
fprintf(stdout, " %4.4s ", filetime+20);
}
column += 13;
break;
#endif
case LIST_FILENAME:
fprintf(stdout, "%s", dn->name);
column += strlen(dn->name);
break;
case LIST_SYMLINK:
if (S_ISLNK(dn->dstat.st_mode)) {
len= readlink(dn->fullname, scratch, (sizeof scratch)-1);
if (len > 0) {
scratch[len]= '\0';
fprintf(stdout, " -> %s", scratch);
#ifdef BB_FEATURE_LS_FILETYPES
if (!stat(dn->fullname, &info)) {
append = append_char(info.st_mode);
}
#endif
column += len+4;
}
}
break;
#ifdef BB_FEATURE_LS_FILETYPES
case LIST_FILETYPE:
if (append != '\0') {
fprintf(stdout, "%1c", append);
column++;
}
break;
#endif
}
}
return(0);
}
/*----------------------------------------------------------------------*/
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;
disp_opts= DISP_NORMAL;
style_fmt= STYLE_AUTO;
list_fmt= LIST_SHORT;
#ifdef BB_FEATURE_LS_SORTFILES
sort_opts= SORT_NAME;
#endif
#ifdef BB_FEATURE_LS_TIMESTAMPS
time_fmt= TIME_MOD;
#endif
nfiles=0;
applet_name= argv[0];
/* process options */
while ((opt = getopt(argc, argv, "1AaCdgilnsx"
#ifdef BB_FEATURE_AUTOWIDTH
"T:w:"
#endif
#ifdef BB_FEATURE_LS_FILETYPES
"Fp"
#endif
#ifdef BB_FEATURE_LS_RECURSIVE
"R"
#endif
#ifdef BB_FEATURE_LS_SORTFILES
"rSvX"
#endif
#ifdef BB_FEATURE_LS_TIMESTAMPS
"cetu"
#endif
#ifdef BB_FEATURE_LS_FOLLOWLINKS
"L"
#endif
)) > 0) {
switch (opt) {
case '1': style_fmt = STYLE_SINGLE; break;
case 'A': disp_opts |= DISP_HIDDEN; break;
case 'a': disp_opts |= DISP_HIDDEN | DISP_DOT; break;
case 'C': style_fmt = STYLE_COLUMNS; break;
case 'd': disp_opts |= DISP_NOLIST; break;
case 'e': list_fmt |= LIST_FULLTIME; 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; break;
case 'n': list_fmt |= LIST_ID_NUMERIC; break;
case 's': list_fmt |= LIST_BLOCKS; break;
case 'x': disp_opts = DISP_ROWS; break;
#ifdef BB_FEATURE_LS_FILETYPES
case 'F': list_fmt |= LIST_FILETYPE | LIST_EXEC; break;
case 'p': list_fmt |= LIST_FILETYPE; break;
#endif
#ifdef BB_FEATURE_LS_RECURSIVE
case 'R': disp_opts |= DISP_RECURSIVE; break;
#endif
#ifdef BB_FEATURE_LS_SORTFILES
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 BB_FEATURE_LS_TIMESTAMPS
case 'c': time_fmt = TIME_CHANGE; sort_opts= SORT_CTIME; break;
case 't': sort_opts= SORT_MTIME; break;
case 'u': time_fmt = TIME_ACCESS; sort_opts= SORT_ATIME; break;
#endif
#ifdef BB_FEATURE_LS_FOLLOWLINKS
case 'L': follow_links= TRUE; break;
#endif
#ifdef BB_FEATURE_AUTOWIDTH
case 'T': tabstops= atoi(optarg); break;
case 'w': terminal_width= atoi(optarg); break;
#endif
default:
goto print_usage_message;
}
}
/* sort out which command line options take precedence */
#ifdef BB_FEATURE_LS_RECURSIVE
if (disp_opts & DISP_NOLIST)
disp_opts &= ~DISP_RECURSIVE; /* no recurse if listing only dir */
#endif
#ifdef BB_FEATURE_LS_TIMESTAMPS
if (time_fmt & TIME_CHANGE) sort_opts= SORT_CTIME;
if (time_fmt & TIME_ACCESS) sort_opts= SORT_ATIME;
#endif
if (style_fmt != STYLE_LONG)
list_fmt &= ~LIST_ID_NUMERIC; /* numeric uid only for long list */
#ifdef BB_FEATURE_LS_USERNAME
if (style_fmt == STYLE_LONG && (list_fmt & LIST_ID_NUMERIC))
list_fmt &= ~LIST_ID_NAME; /* don't list names if numeric uid */
#endif
/* 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.
*/
ac= argc - optind; /* how many cmd line args are left */
if (ac < 1) {
av= (char **)xcalloc((size_t)1, (size_t)(sizeof(char *)));
av[0]= xstrdup(".");
ac=1;
} else {
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)
disp_opts |= 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= (struct dnode *)xmalloc(sizeof(struct dnode));
cur->fullname= xstrdup(av[oi]);
cur->name= cur->fullname;
#ifdef BB_FEATURE_LS_FOLLOWLINKS
if (follow_links == TRUE) {
if (stat(av[oi], &cur->dstat)) {
errorMsg("%s: %s\n", av[oi], strerror(errno));
free(cur->fullname);
free(cur);
continue;
}
} else
#endif
if (lstat(av[oi], &cur->dstat)) { /* get file info into node */
errorMsg("%s: %s\n", av[oi], strerror(errno));
free(cur->fullname);
free(cur);
continue;
}
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 (disp_opts & DISP_NOLIST) {
#ifdef BB_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 BB_FEATURE_LS_SORTFILES
shellsort(dnf, dnfiles);
#endif
showfiles(dnf, dnfiles);
}
if (dndirs > 0) {
#ifdef BB_FEATURE_LS_SORTFILES
shellsort(dnd, dndirs);
#endif
showdirs(dnd, dndirs);
}
}
return(0);
print_usage_message:
usage(ls_usage);
return(FALSE);
}