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NetBSD/bin/ls/ls.c

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/* $NetBSD: ls.c,v 1.66 2009/02/14 08:02:04 lukem Exp $ */
/*
* Copyright (c) 1989, 1993, 1994
* 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. 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.
*/
#include <sys/cdefs.h>
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1989, 1993, 1994\
The Regents of the University of California. All rights reserved.");
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)ls.c 8.7 (Berkeley) 8/5/94";
#else
__RCSID("$NetBSD: ls.c,v 1.66 2009/02/14 08:02:04 lukem Exp $");
#endif
#endif /* not lint */
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <dirent.h>
#include <err.h>
#include <errno.h>
#include <fts.h>
#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <termios.h>
#include <pwd.h>
#include <grp.h>
#include <util.h>
#include "ls.h"
#include "extern.h"
static void display(FTSENT *, FTSENT *);
static int mastercmp(const FTSENT **, const FTSENT **);
static void traverse(int, char **, int);
static void (*printfcn)(DISPLAY *);
static int (*sortfcn)(const FTSENT *, const FTSENT *);
#define BY_NAME 0
#define BY_SIZE 1
#define BY_TIME 2
long blocksize; /* block size units */
int termwidth = 80; /* default terminal width */
int sortkey = BY_NAME;
int rval = EXIT_SUCCESS; /* exit value - set if error encountered */
/* flags */
int f_accesstime; /* use time of last access */
int f_column; /* columnated format */
int f_columnacross; /* columnated format, sorted across */
int f_flags; /* show flags associated with a file */
int f_grouponly; /* long listing without owner */
int f_humanize; /* humanize the size field */
int f_inode; /* print inode */
int f_listdir; /* list actual directory, not contents */
int f_listdot; /* list files beginning with . */
int f_longform; /* long listing format */
int f_nonprint; /* show unprintables as ? */
int f_nosort; /* don't sort output */
int f_numericonly; /* don't convert uid/gid to name */
int f_octal; /* print octal escapes for nongraphic characters */
int f_octal_escape; /* like f_octal but use C escapes if possible */
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_stream; /* stream format */
int f_type; /* add type character for non-regular files */
int f_typedir; /* add type character for directories */
int f_whiteout; /* show whiteout entries */
int
ls_main(int argc, char *argv[])
{
static char dot[] = ".", *dotav[] = { dot, NULL };
struct winsize win;
int ch, fts_options;
int kflag = 0;
const char *p;
setprogname(argv[0]);
(void)setlocale(LC_ALL, "");
/* Terminal defaults to -Cq, non-terminal defaults to -1. */
if (isatty(STDOUT_FILENO)) {
if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &win) == 0 &&
win.ws_col > 0)
termwidth = win.ws_col;
f_column = f_nonprint = 1;
} else
f_singlecol = 1;
/* Root is -A automatically. */
if (!getuid())
f_listdot = 1;
fts_options = FTS_PHYSICAL;
while ((ch = getopt(argc, argv, "1ABCFLRSTWabcdfghiklmnopqrstuwx")) != -1) {
switch (ch) {
/*
* The -1, -C, -l, -m and -x options all override each other so
* shell aliasing works correctly.
*/
case '1':
f_singlecol = 1;
f_column = f_columnacross = f_longform = f_stream = 0;
break;
case 'C':
f_column = 1;
f_columnacross = f_longform = f_singlecol = f_stream =
0;
break;
case 'g':
if (f_grouponly != -1)
f_grouponly = 1;
f_longform = 1;
f_column = f_columnacross = f_singlecol = f_stream = 0;
break;
case 'l':
f_longform = 1;
f_column = f_columnacross = f_singlecol = f_stream = 0;
/* Never let -g take precedence over -l. */
f_grouponly = -1;
break;
case 'm':
f_stream = 1;
f_column = f_columnacross = f_longform = f_singlecol =
0;
break;
case 'x':
f_columnacross = 1;
f_column = f_longform = f_singlecol = f_stream = 0;
break;
/* The -c and -u options 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':
fts_options &= ~FTS_PHYSICAL;
fts_options |= FTS_LOGICAL;
break;
case 'R':
f_recursive = 1;
break;
case 'a':
fts_options |= FTS_SEEDOT;
/* FALLTHROUGH */
case 'A':
f_listdot = 1;
break;
/* The -B option turns off the -b, -q and -w options. */
case 'B':
f_nonprint = 0;
f_octal = 1;
f_octal_escape = 0;
break;
/* The -b option turns off the -B, -q and -w options. */
case 'b':
f_nonprint = 0;
f_octal = 0;
f_octal_escape = 1;
break;
/* The -d option turns off the -R option. */
case 'd':
f_listdir = 1;
f_recursive = 0;
break;
case 'f':
f_nosort = 1;
break;
case 'i':
f_inode = 1;
break;
case 'k':
blocksize = 1024;
kflag = 1;
f_humanize = 0;
break;
/* The -h option forces all sizes to be measured in bytes. */
case 'h':
f_humanize = 1;
kflag = 0;
break;
case 'n':
f_numericonly = 1;
f_longform = 1;
f_column = f_columnacross = f_singlecol = f_stream = 0;
break;
case 'o':
f_flags = 1;
break;
case 'p':
f_typedir = 1;
break;
/* The -q option turns off the -B, -b and -w options. */
case 'q':
f_nonprint = 1;
f_octal = 0;
f_octal_escape = 0;
break;
case 'r':
f_reversesort = 1;
break;
case 'S':
sortkey = BY_SIZE;
break;
case 's':
f_size = 1;
break;
case 'T':
f_sectime = 1;
break;
case 't':
sortkey = BY_TIME;
break;
case 'W':
f_whiteout = 1;
break;
/* The -w option turns off the -B, -b and -q options. */
case 'w':
f_nonprint = 0;
f_octal = 0;
f_octal_escape = 0;
break;
default:
case '?':
usage();
}
}
argc -= optind;
argv += optind;
if (f_column || f_columnacross || f_stream) {
if ((p = getenv("COLUMNS")) != NULL)
termwidth = atoi(p);
}
/*
* If both -g and -l options, let -l take precedence.
*/
if (f_grouponly == -1)
f_grouponly = 0;
/*
* If not -F, -i, -l, -p, -S, -s or -t options, don't require stat
* information.
*/
if (!f_inode && !f_longform && !f_size && !f_type && !f_typedir &&
sortkey == BY_NAME)
fts_options |= FTS_NOSTAT;
/*
* If not -F, -d or -l options, follow any symbolic links listed on
* the command line.
*/
if (!f_longform && !f_listdir && !f_type)
fts_options |= FTS_COMFOLLOW;
/*
* If -W, show whiteout entries
*/
#ifdef FTS_WHITEOUT
if (f_whiteout)
fts_options |= FTS_WHITEOUT;
#endif
/* If -l or -s, figure out block size. */
if (f_inode || f_longform || f_size) {
if (!kflag)
(void)getbsize(NULL, &blocksize);
blocksize /= 512;
}
/* Select a sort function. */
if (f_reversesort) {
switch (sortkey) {
case BY_NAME:
sortfcn = revnamecmp;
break;
case BY_SIZE:
sortfcn = revsizecmp;
break;
case BY_TIME:
if (f_accesstime)
sortfcn = revacccmp;
else if (f_statustime)
sortfcn = revstatcmp;
else /* Use modification time. */
sortfcn = revmodcmp;
break;
}
} else {
switch (sortkey) {
case BY_NAME:
sortfcn = namecmp;
break;
case BY_SIZE:
sortfcn = sizecmp;
break;
case BY_TIME:
if (f_accesstime)
sortfcn = acccmp;
else if (f_statustime)
sortfcn = statcmp;
else /* Use modification time. */
sortfcn = modcmp;
break;
}
}
/* Select a print function. */
if (f_singlecol)
printfcn = printscol;
else if (f_columnacross)
printfcn = printacol;
else if (f_longform)
printfcn = printlong;
else if (f_stream)
printfcn = printstream;
else
printfcn = printcol;
if (argc)
traverse(argc, argv, fts_options);
else
traverse(1, dotav, fts_options);
return rval;
/* NOTREACHED */
}
static int output; /* If anything output. */
/*
* Traverse() walks the logical directory structure specified by the argv list
* in the order specified by the mastercmp() comparison function. During the
* traversal it passes linked lists of structures to display() which represent
* a superset (may be exact set) of the files to be displayed.
*/
static void
traverse(int argc, char *argv[], int options)
{
FTS *ftsp;
FTSENT *p, *chp;
int ch_options, error;
if ((ftsp =
fts_open(argv, options, f_nosort ? NULL : mastercmp)) == NULL)
err(EXIT_FAILURE, NULL);
display(NULL, fts_children(ftsp, 0));
if (f_listdir) {
(void)fts_close(ftsp);
return;
}
/*
* If not recursing down this tree and don't need stat info, just get
* the names.
*/
ch_options = !f_recursive && options & FTS_NOSTAT ? FTS_NAMEONLY : 0;
while ((p = fts_read(ftsp)) != NULL)
switch (p->fts_info) {
case FTS_DC:
warnx("%s: directory causes a cycle", p->fts_name);
break;
case FTS_DNR:
case FTS_ERR:
warnx("%s: %s", p->fts_name, strerror(p->fts_errno));
rval = EXIT_FAILURE;
break;
case FTS_D:
if (p->fts_level != FTS_ROOTLEVEL &&
p->fts_name[0] == '.' && !f_listdot)
break;
/*
* If already output something, put out a newline as
* a separator. If multiple arguments, precede each
* directory with its name.
*/
if (output)
(void)printf("\n%s:\n", p->fts_path);
else if (argc > 1) {
(void)printf("%s:\n", p->fts_path);
output = 1;
}
chp = fts_children(ftsp, ch_options);
display(p, chp);
if (!f_recursive && chp != NULL)
(void)fts_set(ftsp, p, FTS_SKIP);
break;
}
error = errno;
(void)fts_close(ftsp);
errno = error;
if (errno)
err(EXIT_FAILURE, "fts_read");
}
/*
* Display() takes a linked list of FTSENT structures and passes the list
* along with any other necessary information to the print function. P
* points to the parent directory of the display list.
*/
static void
display(FTSENT *p, FTSENT *list)
{
struct stat *sp;
DISPLAY d;
FTSENT *cur;
NAMES *np;
u_int64_t btotal, stotal;
off_t maxsize;
blkcnt_t maxblock;
ino_t maxinode;
int maxmajor, maxminor;
uint32_t maxnlink;
int bcfile, entries, flen, glen, ulen, maxflags, maxgroup;
unsigned int maxlen;
int maxuser, needstats;
const char *user, *group;
char buf[21]; /* 64 bits == 20 digits, +1 for NUL */
char nuser[12], ngroup[12];
char *flags = NULL;
/*
* If list is NULL there are two possibilities: that the parent
* directory p has no children, or that fts_children() returned an
* error. We ignore the error case since it will be replicated
* on the next call to fts_read() on the post-order visit to the
* directory p, and will be signalled in traverse().
*/
if (list == NULL)
return;
needstats = f_inode || f_longform || f_size;
flen = 0;
maxinode = maxnlink = 0;
bcfile = 0;
maxuser = maxgroup = maxflags = maxlen = 0;
btotal = stotal = maxblock = maxsize = 0;
maxmajor = maxminor = 0;
for (cur = list, entries = 0; cur; cur = cur->fts_link) {
if (cur->fts_info == FTS_ERR || cur->fts_info == FTS_NS) {
warnx("%s: %s",
cur->fts_name, strerror(cur->fts_errno));
cur->fts_number = NO_PRINT;
rval = EXIT_FAILURE;
continue;
}
/*
* P is NULL if list is the argv list, to which different rules
* apply.
*/
if (p == NULL) {
/* Directories will be displayed later. */
if (cur->fts_info == FTS_D && !f_listdir) {
cur->fts_number = NO_PRINT;
continue;
}
} else {
/* Only display dot file if -a/-A set. */
if (cur->fts_name[0] == '.' && !f_listdot) {
cur->fts_number = NO_PRINT;
continue;
}
}
if (cur->fts_namelen > maxlen)
maxlen = cur->fts_namelen;
if (needstats) {
sp = cur->fts_statp;
if (sp->st_blocks > maxblock)
maxblock = sp->st_blocks;
if (sp->st_ino > maxinode)
maxinode = sp->st_ino;
if (sp->st_nlink > maxnlink)
maxnlink = sp->st_nlink;
if (sp->st_size > maxsize)
maxsize = sp->st_size;
if (S_ISCHR(sp->st_mode) || S_ISBLK(sp->st_mode)) {
bcfile = 1;
if (major(sp->st_rdev) > maxmajor)
maxmajor = major(sp->st_rdev);
if (minor(sp->st_rdev) > maxminor)
maxminor = minor(sp->st_rdev);
}
btotal += sp->st_blocks;
stotal += sp->st_size;
if (f_longform) {
if (f_numericonly ||
(user = user_from_uid(sp->st_uid, 0)) ==
NULL) {
(void)snprintf(nuser, sizeof(nuser),
"%u", sp->st_uid);
user = nuser;
}
if (f_numericonly ||
(group = group_from_gid(sp->st_gid, 0)) ==
NULL) {
(void)snprintf(ngroup, sizeof(ngroup),
"%u", sp->st_gid);
group = ngroup;
}
if ((ulen = strlen(user)) > maxuser)
maxuser = ulen;
if ((glen = strlen(group)) > maxgroup)
maxgroup = glen;
if (f_flags) {
flags =
flags_to_string((u_long)sp->st_flags, "-");
if ((flen = strlen(flags)) > maxflags)
maxflags = flen;
} else
flen = 0;
if ((np = malloc(sizeof(NAMES) +
ulen + glen + flen + 2)) == NULL)
err(EXIT_FAILURE, NULL);
np->user = &np->data[0];
(void)strcpy(np->user, user);
np->group = &np->data[ulen + 1];
(void)strcpy(np->group, group);
if (f_flags) {
np->flags = &np->data[ulen + glen + 2];
(void)strcpy(np->flags, flags);
free(flags);
}
cur->fts_pointer = np;
}
}
++entries;
}
if (!entries)
return;
d.list = list;
d.entries = entries;
d.maxlen = maxlen;
if (needstats) {
d.btotal = btotal;
d.stotal = stotal;
if (f_humanize) {
d.s_block = 4; /* min buf length for humanize_number */
} else {
(void)snprintf(buf, sizeof(buf), "%llu",
(long long)howmany(maxblock, blocksize));
d.s_block = strlen(buf);
}
d.s_flags = maxflags;
d.s_group = maxgroup;
(void)snprintf(buf, sizeof(buf), "%llu",
(unsigned long long)maxinode);
d.s_inode = strlen(buf);
(void)snprintf(buf, sizeof(buf), "%u", maxnlink);
d.s_nlink = strlen(buf);
if (f_humanize) {
d.s_size = 4; /* min buf length for humanize_number */
} else {
(void)snprintf(buf, sizeof(buf), "%llu",
(long long)maxsize);
d.s_size = strlen(buf);
}
d.s_user = maxuser;
if (bcfile) {
(void)snprintf(buf, sizeof(buf), "%u", maxmajor);
d.s_major = strlen(buf);
(void)snprintf(buf, sizeof(buf), "%u", maxminor);
d.s_minor = strlen(buf);
if (d.s_major + d.s_minor + 2 > d.s_size)
d.s_size = d.s_major + d.s_minor + 2;
else if (d.s_size - d.s_minor - 2 > d.s_major)
d.s_major = d.s_size - d.s_minor - 2;
} else {
d.s_major = 0;
d.s_minor = 0;
}
}
printfcn(&d);
output = 1;
if (f_longform)
for (cur = list; cur; cur = cur->fts_link)
free(cur->fts_pointer);
}
/*
* Ordering for mastercmp:
* If ordering the argv (fts_level = FTS_ROOTLEVEL) return non-directories
* as larger than directories. Within either group, use the sort function.
* All other levels use the sort function. Error entries remain unsorted.
*/
static int
mastercmp(const FTSENT **a, const FTSENT **b)
{
int a_info, b_info;
a_info = (*a)->fts_info;
if (a_info == FTS_ERR)
return (0);
b_info = (*b)->fts_info;
if (b_info == FTS_ERR)
return (0);
if (a_info == FTS_NS || b_info == FTS_NS) {
if (b_info != FTS_NS)
return (1);
else if (a_info != FTS_NS)
return (-1);
else
return (namecmp(*a, *b));
}
if (a_info != b_info && !f_listdir &&
(*a)->fts_level == FTS_ROOTLEVEL) {
if (a_info == FTS_D)
return (1);
else if (b_info == FTS_D)
return (-1);
}
return (sortfcn(*a, *b));
}
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