OpenBSD-4.6/bin/chmod/chmod.c
/* $OpenBSD: chmod.c,v 1.24 2009/01/21 16:05:39 sobrado Exp $ */
/* $NetBSD: chmod.c,v 1.12 1995/03/21 09:02:09 cgd Exp $ */
/*
* Copyright (c) 1989, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* 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.
*/
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1989, 1993, 1994\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)chmod.c 8.8 (Berkeley) 4/1/94";
#else
static const char rcsid[] = "$OpenBSD: chmod.c,v 1.24 2009/01/21 16:05:39 sobrado Exp $";
#endif
#endif /* not lint */
#include <sys/param.h>
#include <sys/stat.h>
#include <err.h>
#include <errno.h>
#include <fts.h>
#include <grp.h>
#include <limits.h>
#include <locale.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
int ischflags, ischown, ischgrp, ischmod;
extern char *__progname;
gid_t a_gid(const char *);
uid_t a_uid(const char *, int);
__dead void usage(void);
int
main(int argc, char *argv[])
{
FTS *ftsp;
FTSENT *p;
void *set;
long val;
int oct;
mode_t omode;
int Hflag, Lflag, Rflag, ch, fflag, fts_options, hflag, rval;
uid_t uid;
gid_t gid;
u_int32_t fclear, fset;
char *ep, *mode, *cp, *flags;
#ifdef lint
set = NULL;
oct = omode = 0;
#endif
setlocale(LC_ALL, "");
ischown = __progname[2] == 'o';
ischgrp = __progname[2] == 'g';
ischmod = __progname[2] == 'm';
ischflags = __progname[2] == 'f';
uid = (uid_t)-1;
gid = (gid_t)-1;
Hflag = Lflag = Rflag = fflag = hflag = 0;
while ((ch = getopt(argc, argv, "HLPRXfghorstuwx")) != -1)
switch (ch) {
case 'H':
Hflag = 1;
Lflag = 0;
break;
case 'L':
Lflag = 1;
Hflag = 0;
break;
case 'P':
Hflag = Lflag = 0;
break;
case 'R':
Rflag = 1;
break;
case 'f': /* XXX: undocumented. */
fflag = 1;
break;
case 'h':
/*
* In System V (and probably POSIX.2) the -h option
* causes chmod to change the mode of the symbolic
* link. 4.4BSD's symbolic links don't have modes,
* so it's an undocumented noop. Do syntax checking,
* though.
*/
hflag = 1;
break;
/*
* XXX
* "-[rwx]" are valid mode commands. If they are the entire
* argument, getopt has moved past them, so decrement optind.
* Regardless, we're done argument processing.
*/
case 'g': case 'o': case 'r': case 's':
case 't': case 'u': case 'w': case 'X': case 'x':
if (!ischmod)
usage();
if (argv[optind - 1][0] == '-' &&
argv[optind - 1][1] == ch &&
argv[optind - 1][2] == '\0')
--optind;
goto done;
default:
usage();
}
done:
argv += optind;
argc -= optind;
if (argc < 2)
usage();
fts_options = FTS_PHYSICAL;
if (Rflag) {
if (hflag)
errx(1,
"the -R and -h options may not be specified together.");
if (Hflag)
fts_options |= FTS_COMFOLLOW;
if (Lflag) {
fts_options &= ~FTS_PHYSICAL;
fts_options |= FTS_LOGICAL;
}
}
if (ischflags) {
flags = *argv;
if (*flags >= '0' && *flags <= '7') {
errno = 0;
val = strtoul(flags, &ep, 8);
if (val > UINT_MAX)
errno = ERANGE;
if (errno)
err(1, "invalid flags: %s", flags);
if (*ep)
errx(1, "invalid flags: %s", flags);
fset = val;
oct = 1;
} else {
if (strtofflags(&flags, &fset, &fclear))
errx(1, "invalid flag: %s", flags);
fclear = ~fclear;
oct = 0;
}
} else if (ischmod) {
mode = *argv;
if (*mode >= '0' && *mode <= '7') {
errno = 0;
val = strtol(mode, &ep, 8);
if (val > INT_MAX || val < 0)
errno = ERANGE;
if (errno)
err(1, "invalid file mode: %s", mode);
if (*ep)
errx(1, "invalid file mode: %s", mode);
omode = val;
oct = 1;
} else {
if ((set = setmode(mode)) == NULL)
errx(1, "invalid file mode: %s", mode);
oct = 0;
}
} else if (ischown) {
/* Both UID and GID are given. */
if ((cp = strchr(*argv, ':')) != NULL) {
*cp++ = '\0';
gid = a_gid(cp);
}
#ifdef SUPPORT_DOT
/* UID and GID are separated by a dot and UID exists. */
else if ((cp = strchr(*argv, '.')) != NULL &&
(uid = a_uid(*argv, 1)) == (uid_t)-1) {
*cp++ = '\0';
gid = a_gid(cp);
}
#endif
if (uid == (uid_t)-1)
uid = a_uid(*argv, 0);
} else
gid = a_gid(*argv);
if ((ftsp = fts_open(++argv, fts_options, 0)) == NULL)
err(1, NULL);
for (rval = 0; (p = fts_read(ftsp)) != NULL;) {
switch (p->fts_info) {
case FTS_D:
if (!Rflag)
fts_set(ftsp, p, FTS_SKIP);
if (ischmod)
break;
else
continue;
case FTS_DNR: /* Warn, chmod, continue. */
warnx("%s: %s", p->fts_path, strerror(p->fts_errno));
rval = 1;
break;
case FTS_DP: /* Already changed at FTS_D. */
if (ischmod)
continue;
else
break;
case FTS_ERR: /* Warn, continue. */
case FTS_NS:
warnx("%s: %s", p->fts_path, strerror(p->fts_errno));
rval = 1;
continue;
case FTS_SL: /* Ignore. */
case FTS_SLNONE:
/*
* The only symlinks that end up here are ones that
* don't point to anything and ones that we found
* doing a physical walk.
*/
if (ischflags || ischmod || !hflag)
continue;
break;
default:
break;
}
if (ischflags) {
if (oct) {
if (!chflags(p->fts_accpath, fset))
continue;
} else {
p->fts_statp->st_flags |= fset;
p->fts_statp->st_flags &= fclear;
if (!chflags(p->fts_accpath, p->fts_statp->st_flags))
continue;
}
warn("%s", p->fts_path);
rval = 1;
} else if (ischmod && chmod(p->fts_accpath, oct ? omode :
getmode(set, p->fts_statp->st_mode)) && !fflag) {
warn("%s", p->fts_path);
rval = 1;
} else if (!ischmod && !ischflags &&
(hflag ? lchown(p->fts_accpath, uid, gid) :
chown(p->fts_accpath, uid, gid)) && !fflag) {
warn("%s", p->fts_path);
rval = 1;
}
}
if (errno)
err(1, "fts_read");
exit(rval);
}
/*
* Given a UID or user name in a string, return the UID. If an empty string
* was given, returns -1. If silent is 0, exits on invalid user names/UIDs;
* otherwise, returns -1.
*/
uid_t
a_uid(const char *s, int silent)
{
struct passwd *pw;
const char *errstr;
uid_t uid;
if (*s == '\0') /* Argument was "[:.]gid". */
return ((uid_t)-1);
/* User name was given. */
if ((pw = getpwnam(s)) != NULL)
return (pw->pw_uid);
/* UID was given. */
uid = (uid_t)strtonum(s, 0, UID_MAX, &errstr);
if (errstr) {
if (silent)
return ((uid_t)-1);
else
errx(1, "user is %s: %s", errstr, s);
}
return (uid);
}
/*
* Given a GID or group name in a string, return the GID. If an empty string
* was given, returns -1. Exits on invalid user names/UIDs.
*/
gid_t
a_gid(const char *s)
{
struct group *gr;
const char *errstr;
gid_t gid;
if (*s == '\0') /* Argument was "uid[:.]". */
return ((gid_t)-1);
/* Group name was given. */
if ((gr = getgrnam(s)) != NULL)
return (gr->gr_gid);
/* GID was given. */
gid = (gid_t)strtonum(s, 0, GID_MAX, &errstr);
if (errstr)
errx(1, "group is %s: %s", errstr, s);
return (gid);
}
void
usage(void)
{
if (ischmod || ischflags)
fprintf(stderr,
"usage: %s [-R [-H | -L | -P]] %s file ...\n",
__progname, ischmod ? "mode" : "flags");
else
fprintf(stderr,
"usage: %s [-fh] [-R [-H | -L | -P]] %s file ...\n",
__progname, ischown ? "owner[:group]" : "group");
if (ischown)
fprintf(stderr,
" %s [-fh] [-R [-H | -L | -P]] :group file ...\n",
__progname);
exit(1);
}