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LS.C
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1993-06-23
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/*
* Copyright (c) 1989 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Michael Fischbein.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifdef DF_POSIX /* DF_MSS */
#include <misc.h>
#include <bsdlib.h>
#endif
#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1989 The Regents of the University of California.\n\
All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static char sccsid[] = "@(#)ls.c 5.48 (Berkeley) 4/3/91";
#endif /* not lint */
#ifdef DF_POSIX /* DF_DSC */
#include <sys/cdefs.h>
#else
#include <sys/param.h>
#endif
#include <sys/stat.h>
#ifdef _POSIX_SOURCE /* DF_DSC */
#include <stdlib.h>
#include <unistd.h>
#else
#include <sys/ioctl.h>
#endif
#include <dirent.h>
#include <string.h>
#include <errno.h>
#include <stdio.h>
#include "ls.h"
int (*sortfcn) __P((LS *, LS *));
void (*printfcn) __P((LS *, register int));
#ifndef _POSIX_SOURCE
int lstat();
#endif
extern char *emalloc __P((u_int));
#if WIN_NT
extern int acccmp __P((LS *, LS *)), modcmp __P((LS *, LS *));
extern int namecmp __P((LS *, LS *));
extern void prcopy __P((register char *, register char *, int));
extern void printcol __P((LS *, register int));
extern void printlong __P((LS *, register int));
extern void printscol __P((register LS *, register int));
extern int revacccmp __P((LS *, LS *)), revmodcmp __P((LS *, LS *));
extern int revnamecmp __P((LS *, LS *)), revstatcmp __P((LS *, LS *));
extern int statcmp __P((LS *, LS *));
extern void nomem __P((void));
extern void usage __P((void));
extern int globulate __P((int, int, char **));
extern void deglobulate __P((void));
extern int globulated_argc;
extern char **globulated_argv;
pid_t ppid;
int globulation;
#endif
int termwidth = 80; /* default terminal width */
/* flags */
int f_accesstime; /* use time of last access */
int f_column; /* columnated format */
int f_group; /* show group ownership of a file */
int f_ignorelink; /* indirect through symbolic link operands */
int f_inode; /* print inode */
int f_kblocks; /* print size in kilobytes */
int f_listalldot; /* list . and .. as well */
int f_listdir; /* list actual directory, not contents */
int f_listdot; /* list files beginning with . */
int f_longform; /* long listing format */
int f_needstat; /* if need to stat files */
int f_newline; /* if precede with newline */
int f_nonprint; /* show unprintables as ? */
int f_nosort; /* don't sort output */
int f_recursive; /* ls subdirectories also */
int f_reversesort; /* reverse whatever sort is used */
int f_sectime; /* print the real time for all files */
int f_singlecol; /* use single column output */
int f_size; /* list size in short listing */
int f_statustime; /* use time of last mode change */
int f_dirname; /* if precede with directory name */
int f_timesort; /* sort by time vice name */
int f_total; /* if precede with "total" line */
int f_type; /* add type character for non-regular files */
#if _POSIX_SOURCE
int (*statfcn) __P((const char *, struct stat *));
#else
int (*statfcn)(), stat(), lstat();
#endif
#if WIN_NT
void doargs __P((int, char **));
void displaydir __P((LS *, register int));
void subdir __P((LS *));
int tabdir __P((LS *, LS **, char **));
#endif
int
#if __STDC__
main (int argc, char **argv)
#else
main(argc, argv)
int argc;
char **argv;
#endif
{
#ifdef _POSIX_SOURCE /* DF_DSC */
extern int optind;
#else
extern int optind, stat();
struct winsize win;
#endif
int ch;
#if !WIN_NT
char *p, *getenv();
int acccmp(), modcmp(), namecmp(), prcopy(), printcol();
int printlong(), printscol(), revacccmp(), revmodcmp(), revnamecmp();
int revstatcmp(), statcmp();
#endif
#if WIN_NT
ppid = getppid();
if (ppid == (pid_t) 1) /* if parent is CMD.EXE */
{
globulation = globulate(1, argc, argv);
if (globulation == 0)
{
argc = globulated_argc;
argv = globulated_argv;
}
}
#endif
/* terminal defaults to -Cq, non-terminal defaults to -1 */
if (isatty(1)) {
f_nonprint = 1;
#ifndef _POSIX_SOURCE /* DF_MSS */
if (ioctl(1, TIOCGWINSZ, &win) == -1 || !win.ws_col) {
if (p = getenv("COLUMNS"))
termwidth = atoi(p);
}
else
termwidth = win.ws_col;
#endif
f_column = 1;
} else
f_singlecol = 1;
/* root is -A automatically */
if (!getuid())
f_listdot = 1;
#if _POSIX_SOURCE
while ((ch = getopt(argc, argv, "1ACFLRTacdfiklqrstu")) != EOF) {
#else
while ((ch = getopt(argc, argv, "1ACFLRTacdfgiklqrstu")) != EOF) {
#endif
switch (ch) {
/*
* -1, -C and -l all override each other
* so shell aliasing works right
*/
case '1':
f_singlecol = 1;
f_column = f_longform = 0;
#if _POSIX_SOURCE
f_group = 0;
#endif
break;
case 'C':
f_column = 1;
f_longform = f_singlecol = 0;
#if _POSIX_SOURCE
f_group = 0;
#endif
break;
case 'l':
f_longform = 1;
#if _POSIX_SOURCE
f_group = 1;
#endif
f_column = f_singlecol = 0;
break;
/* -c and -u override each other */
case 'c':
f_statustime = 1;
f_accesstime = 0;
break;
case 'u':
f_accesstime = 1;
f_statustime = 0;
break;
case 'F':
f_type = 1;
break;
case 'L':
f_ignorelink = 1;
break;
case 'R':
f_recursive = 1;
break;
case 'a':
f_listalldot = 1;
/* FALLTHROUGH */
case 'A':
f_listdot = 1;
break;
case 'd':
f_listdir = 1;
break;
case 'f':
f_nosort = 1;
break;
#if !_POSIX_SOURCE
case 'g':
f_group = 1;
break;
#endif
case 'i':
f_inode = 1;
break;
case 'k':
f_kblocks = 1;
break;
case 'q':
f_nonprint = 1;
break;
case 'r':
f_reversesort = 1;
break;
case 's':
f_size = 1;
break;
case 'T':
f_sectime = 1;
break;
case 't':
f_timesort = 1;
break;
default:
case '?':
usage();
}
}
argc -= optind;
argv += optind;
/* -d turns off -R */
if (f_listdir)
f_recursive = 0;
/* if need to stat files */
f_needstat = f_longform || f_recursive || f_timesort ||
f_size || f_type;
/* select a sort function */
if (f_reversesort) {
if (!f_timesort)
sortfcn = revnamecmp;
else if (f_accesstime)
sortfcn = revacccmp;
else if (f_statustime)
sortfcn = revstatcmp;
else /* use modification time */
sortfcn = revmodcmp;
} else {
if (!f_timesort)
sortfcn = namecmp;
else if (f_accesstime)
sortfcn = acccmp;
else if (f_statustime)
sortfcn = statcmp;
else /* use modification time */
sortfcn = modcmp;
}
/* select a print function */
if (f_singlecol)
printfcn = printscol;
else if (f_longform)
printfcn = printlong;
else
printfcn = printcol;
#if _POSIX_SOURCE
statfcn = stat;
#else
/* if -l, -d or -F, and not ignoring the link, use lstat() */
statfcn =
(f_longform || f_listdir || f_type) && !f_ignorelink ? lstat : stat;
#endif
if (!argc) {
static char dot[] = ".";
argc = 1;
argv[0] = dot;
argv[1] = NULL;
}
doargs(argc, argv);
#ifndef _POSIX_SOURCE /* DF_MSS: fclosing not working in POSIX */
fflush (stderr);
fflush (stdout);
fclose (stderr);
fclose (stdout);
fclose (stdin);
#endif
#if WIN_NT
if (ppid == (pid_t) 1 && globulation == 0)
deglobulate();
#endif
return EXIT_SUCCESS;
}
static char path[MAXPATHLEN + 1];
static char *endofpath = path;
void
#if __STDC__
doargs (int argc, char **argv)
#else
doargs(argc, argv)
int argc;
char **argv;
#endif
{
register LS *dstatp, *rstatp;
register int cnt, dircnt, maxlen, regcnt;
LS *dstats, *rstats;
struct stat sb;
char top[MAXPATHLEN + 1];
u_long blocks;
/*
* walk through the operands, building separate arrays of LS
* structures for directory and non-directory files.
*/
dstats = rstats = NULL;
for (dircnt = regcnt = 0; *argv; ++argv) {
#if BETA
printf("doargs - before stat; *argv: \"%s\"\n", *argv);
#endif
#if _POSIX_SOURCE
if (statfcn(*argv, &sb)) {
# if BETA
printf("doargs - after non-zero stat\n");
# endif
#else
if (statfcn(*argv, &sb) &&
(statfcn == lstat || lstat(*argv, &sb))) {
#endif
(void)fprintf(stderr,
"ls: %s: %s\n", *argv, strerror(errno));
if (errno == ENOENT)
continue;
#if WIN_NT
if (ppid == (pid_t) 1 && globulation == 0)
deglobulate();
#endif
exit(EXIT_FAILURE);
}
#if BETA
printf("*argv: \"%s\"; S_ISDIR: %d; sb.st_size: %ld\n",
*argv, S_ISDIR(sb.st_mode), (long) sb.st_size);
#endif
#if DF_POSIX
if (S_ISDIR(sb.st_mode))
sb.st_size = (off_t) 0;
#endif
if (S_ISDIR(sb.st_mode) && !f_listdir) {
if (!dstats)
dstatp = dstats = (LS *)emalloc((u_int)argc *
(sizeof(LS)));
dstatp->name = *argv;
dstatp->lstat = sb;
++dstatp;
++dircnt;
}
else {
if (!rstats) {
rstatp = rstats = (LS *)emalloc((u_int)argc *
(sizeof(LS)));
blocks = 0;
maxlen = -1;
}
rstatp->name = *argv;
rstatp->lstat = sb;
/* save name length for -C format */
rstatp->len = strlen(*argv);
if (f_nonprint)
prcopy(*argv, *argv, rstatp->len);
/* calculate number of blocks if -l/-s formats */
if (f_longform || f_size)
#ifdef _POSIX_SOURCE /* DF_MSS */
blocks += (sb.st_size/BLOCK_SIZE) + 1;
#else
blocks += sb.st_blocks;
#endif
/* save max length if -C format */
if (f_column && maxlen < rstatp->len)
maxlen = rstatp->len;
++rstatp;
++regcnt;
}
}
/* display regular files */
if (regcnt) {
#ifndef _POSIX_SOURCE /* DF_MSS */
rstats[0].lstat.st_btotal = blocks;
rstats[0].lstat.st_maxlen = maxlen;
#endif
displaydir(rstats, regcnt);
f_newline = f_dirname = 1;
}
/* display directories */
if (dircnt) {
register char *p;
f_total = 1;
if (dircnt > 1) {
#if _POSIX_SOURCE
(void)getcwd(top, sizeof top - 1);
#else
(void)getwd(top);
#endif
#if __STDC__
qsort((void *)dstats, (size_t)dircnt, sizeof(LS), (int (*)(const void *, const void *))sortfcn);
#else
qsort((char *)dstats, dircnt, sizeof(LS), sortfcn);
#endif
f_dirname = 1;
}
for (cnt = 0; cnt < dircnt; ++dstats) {
for (endofpath = path, p = dstats->name;
(*endofpath = *p++) != '\0'; ++endofpath);
#if BETA
puts("before subdir(dstats)");
#endif
subdir(dstats);
f_newline = 1;
if (++cnt < dircnt && chdir(top)) {
(void)fprintf(stderr, "ls: %s: %s\n",
top, strerror(errno));
#if WIN_NT
if (ppid == (pid_t) 1 && globulation == 0)
deglobulate();
#endif
exit(EXIT_FAILURE);
}
}
}
}
void
#if __STDC__
displaydir (LS *stats, register int num)
#else
displaydir(stats, num)
LS *stats;
register int num;
#endif
{
register char *p, *savedpath;
LS *lp;
if (num > 1 && !f_nosort) {
#ifndef _POSIX_SOURCE /* DF_MSS */
u_long save1, save2;
save1 = stats[0].lstat.st_btotal;
save2 = stats[0].lstat.st_maxlen;
#endif
#if __STDC__
qsort((void *)stats, (size_t)num, sizeof(LS), (int (*)(const void *, const void *))sortfcn);
#else
qsort((char *)stats, num, sizeof(LS), sortfcn);
#endif
#ifndef _POSIX_SOURCE /* DF_MSS */
stats[0].lstat.st_btotal = save1;
stats[0].lstat.st_maxlen = save2;
#endif
}
printfcn(stats, num);
if (f_recursive) {
savedpath = endofpath;
for (lp = stats; num--; ++lp) {
if (!S_ISDIR(lp->lstat.st_mode))
continue;
p = lp->name;
if (p[0] == '.' && (!p[1] || p[1] == '.' && !p[2]))
continue;
if (endofpath != path && endofpath[-1] != '/')
*endofpath++ = '/';
for (; (*endofpath = *p++) != '\0'; ++endofpath);
f_newline = f_dirname = f_total = 1;
#if BETA
puts("before subdir(lp)");
#endif
subdir(lp);
*(endofpath = savedpath) = '\0';
}
}
}
void
#if __STDC__
subdir (LS *lp)
#else
subdir(lp)
LS *lp;
#endif
{
LS *stats;
int num;
char *names;
if (f_newline)
(void)putchar('\n');
if (f_dirname)
(void)printf("%s:\n", path);
if (chdir(lp->name)) {
(void)fprintf(stderr, "ls: %s: %s\n", lp->name,
strerror(errno));
return;
}
if ((num = tabdir(lp, &stats, &names)) != 0) {
displaydir(stats, num);
(void)free((char *)stats);
(void)free((char *)names);
}
if (chdir("..")) {
(void)fprintf(stderr, "ls: ..: %s\n", strerror(errno));
#if WIN_NT
if (ppid == (pid_t) 1 && globulation == 0)
deglobulate();
#endif
exit(EXIT_FAILURE);
}
}
int
#if __STDC__
tabdir (LS *lp, LS **s_stats, char **s_names)
#else
tabdir(lp, s_stats, s_names)
LS *lp, **s_stats;
char **s_names;
#endif
{
register DIR *dirp;
register int cnt, maxentry, maxlen;
register char *p, *names;
struct dirent *dp;
u_long blocks;
LS *stats;
if (!(dirp = opendir("."))) {
(void)fprintf(stderr, "ls: %s: %s\n", lp->name,
strerror(errno));
return(0);
}
#if BETA
printf("a opendir; f_needstat: %d\n", f_needstat);
#endif
blocks = maxentry = maxlen = 0;
stats = NULL;
for (cnt = 0; (dp = readdir(dirp)) != NULL;) {
/* this does -A and -a */
p = dp->d_name;
#if BETA
printf("a readdir; file: \"%s\"\n", p);
#endif
if (p[0] == '.') {
if (!f_listdot)
continue;
if (!f_listalldot && (!p[1] || p[1] == '.' && !p[2]))
continue;
}
#if BETA
puts("after dot check");
#endif
if (cnt == maxentry) {
if (!maxentry) {
#if BETA
int err;
#endif
#ifdef _POSIX_SOURCE /* DF_MSS */
if( lp->lstat.st_size == (off_t) 0 )
lp->lstat.st_size = (off_t) 7000;
#if BETA
printf("st_size: %u\n", (u_int)lp->lstat.st_size);
#endif
#endif
*s_names = names =
emalloc((u_int)lp->lstat.st_size);
#if BETA
err = errno;
if (names == NULL) {
printf("errno: %d\n", err);
nomem();
}
#endif
}
#define DEFNUM 256
maxentry += DEFNUM;
if (!(*s_stats = stats = (LS *)realloc((char *)stats,
(u_int)maxentry * sizeof(LS))))
nomem();
}
#if BETA
puts("after maxentry check");
#endif
if (f_needstat && statfcn(dp->d_name, &stats[cnt].lstat) &&
#if _POSIX_SOURCE
statfcn == stat ) {
#else
statfcn == stat && lstat(dp->d_name, &stats[cnt].lstat)) {
#endif
/*
* don't exit -- this could be an NFS mount that has
* gone away. Flush stdout so the messages line up.
*/
(void)fflush(stdout);
(void)fprintf(stderr,
"ls: %s: %s\n", dp->d_name, strerror(errno));
continue;
}
stats[cnt].name = names;
#if BETA
printf("after f_needstat check; dp->d_name: \"%s\"; names: %p; len: %u\n",
dp->d_name, names, (unsigned int) strlen(dp->d_name));
#endif
if (f_nonprint)
#ifdef _POSIX_SOURCE /* DF_MSS */
prcopy(dp->d_name, names, (int)strlen(dp->d_name));
else
bcopy(dp->d_name, names, (int)strlen(dp->d_name));
#if BETA
puts("after nonprint check");
#endif
names += strlen(dp->d_name);
#else
prcopy(dp->d_name, names, (int)dp->d_namlen);
else
bcopy(dp->d_name, names, (int)dp->d_namlen);
names += dp->d_namlen;
#endif
*names++ = '\0';
#if BETA
puts("after names mucking");
#endif
/*
* get the inode from the directory, so the -f flag
* works right.
*/
#ifndef _POSIX_SOURCE /* DF_MSS */
stats[cnt].lstat.st_ino = dp->d_ino;
#endif
/* save name length for -C format */
#ifdef _POSIX_SOURCE /* DF_MSS */
stats[cnt].len = strlen(dp->d_name);
#else
stats[cnt].len = dp->d_namlen;
#endif
/* calculate number of blocks if -l/-s formats */
if (f_longform || f_size)
#ifdef _POSIX_SOURCE /* DF_MSS: POSIX does not support st_blocks defaulting to 10 */
blocks += (stats[cnt].lstat.st_size/BLOCK_SIZE) + 1;
#else
blocks += stats[cnt].lstat.st_blocks;
#endif
/* save max length if -C format */
#ifdef _POSIX_SOURCE /* DF_MSS */
if (f_column && maxlen < (int)strlen(dp->d_name))
maxlen = strlen(dp->d_name);
#else
if (f_column && maxlen < (int)dp->d_namlen)
maxlen = dp->d_namlen;
#endif
++cnt;
#if BETA
puts("end-o-loop");
#endif
}
(void)closedir(dirp);
if (cnt) {
#ifndef _POSIX_SOURCE /* DF_MSS */
stats[0].lstat.st_btotal = blocks;
stats[0].lstat.st_maxlen = maxlen;
#endif
} else if (stats) {
(void)free((char *)stats);
(void)free((char *)names);
}
return(cnt);
}