[apple/file_cmds.git] / chown / chown.c

/*
 * Copyright (c) 1988, 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. 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.
 */

#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1988, 1993, 1994\n\
	The Regents of the University of California.  All rights reserved.\n";
#endif /* not lint */

#ifndef lint
#if 0
static char sccsid[] = "@(#)chown.c	8.8 (Berkeley) 4/4/94";
#endif
#endif /* not lint */

#include <sys/cdefs.h>
__RCSID("$FreeBSD: src/usr.sbin/chown/chown.c,v 1.24 2002/07/17 16:22:24 dwmalone Exp $");

#include <sys/param.h>
#include <sys/stat.h>

#include <err.h>
#include <errno.h>
#include <fts.h>
#include <grp.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

void	a_gid(const char *);
void	a_uid(const char *);
void	chownerr(const char *);
u_long	id(const char *, const char *);
void	usage(void);

uid_t uid;
gid_t gid;
int ischown;
const char *gname;

int
main(int argc, char **argv)
{
	FTS *ftsp;
	FTSENT *p;
	int Hflag, Lflag, Rflag, fflag, hflag, vflag;
	int ch, fts_options, rval;
	char *cp;

	cp = strrchr(argv[0], '/');
	cp = (cp != NULL) ? cp + 1 : argv[0];
	ischown = (strcmp(cp, "chown") == 0);

	Hflag = Lflag = Rflag = fflag = hflag = vflag = 0;
	while ((ch = getopt(argc, argv, "HLPRfhv")) != -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':
			fflag = 1;
			break;
		case 'h':
			hflag = 1;
	 		break;
		case 'v':
			vflag = 1;
			break;
		case '?':
		default:
			usage();
		}
	argv += optind;
	argc -= optind;

	if (argc < 2)
		usage();

	if (Rflag) {
		fts_options = FTS_PHYSICAL;
		if (hflag && (Hflag || Lflag))
			errx(1, "the -R%c and -h options may not be "
			    "specified together", Hflag ? 'H' : 'L');
		if (Hflag)
			fts_options |= FTS_COMFOLLOW;
		else if (Lflag) {
			fts_options &= ~FTS_PHYSICAL;
			fts_options |= FTS_LOGICAL;
		}
	} else
		fts_options = hflag ? FTS_PHYSICAL : FTS_LOGICAL;

	uid = (uid_t)-1;
	gid = (gid_t)-1;
	if (ischown) {
		if ((cp = strchr(*argv, ':')) != NULL) {
			*cp++ = '\0';
			a_gid(cp);
		}
#ifdef SUPPORT_DOT
		else if ((cp = strchr(*argv, '.')) != NULL) {
			warnx("separation of user and group with a period is deprecated");
			*cp++ = '\0';
			a_gid(cp);
		}
#endif
		a_uid(*argv);
	} else
		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:			/* Change it at FTS_DP. */
			if (!Rflag)
				fts_set(ftsp, p, FTS_SKIP);
			continue;
		case FTS_DNR:			/* Warn, chown. */
			warnx("%s: %s", p->fts_path, strerror(p->fts_errno));
			rval = 1;
			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:
		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 (hflag)
				break;
			else
				continue;
		default:
			break;
		}
		if ((uid == (uid_t)-1 || uid == p->fts_statp->st_uid) &&
		    (gid == (gid_t)-1 || gid == p->fts_statp->st_gid))
			continue;
		if ((hflag ? lchown : chown)(p->fts_accpath, uid, gid) == -1) {
			if (!fflag) {
				chownerr(p->fts_path);
				rval = 1;
			}
		} else {
			if (vflag)
				printf("%s\n", p->fts_path);
		}
	}
	if (errno)
		err(1, "fts_read");
	exit(rval);
}

void
a_gid(const char *s)
{
	struct group *gr;

	if (*s == '\0')			/* Argument was "uid[:.]". */
		return;
	gname = s;
	gid = ((gr = getgrnam(s)) != NULL) ? gr->gr_gid : id(s, "group");
}

void
a_uid(const char *s)
{
	struct passwd *pw;

	if (*s == '\0')			/* Argument was "[:.]gid". */
		return;
	uid = ((pw = getpwnam(s)) != NULL) ? pw->pw_uid : id(s, "user");
}

u_long
id(const char *name, const char *type)
{
	u_long val;
	char *ep;

	/*
	 * XXX
	 * We know that uid_t's and gid_t's are unsigned longs.
	 */
	errno = 0;
	val = strtoul(name, &ep, 10);
	if (errno)
		err(1, "%s", name);
	if (*ep != '\0')
		errx(1, "%s: illegal %s name", name, type);
	return (val);
}

void
chownerr(const char *file)
{
	static uid_t euid = -1;
	static int ngroups = -1;
	gid_t groups[NGROUPS_MAX];

	/* Check for chown without being root. */
	if (errno != EPERM || (uid != (uid_t)-1 &&
	    euid == (uid_t)-1 && (euid = geteuid()) != 0)) {
		warn("%s", file);
		return;
	}

	/* Check group membership; kernel just returns EPERM. */
	if (gid != (gid_t)-1 && ngroups == -1 &&
	    euid == (uid_t)-1 && (euid = geteuid()) != 0) {
		ngroups = getgroups(NGROUPS_MAX, groups);
		while (--ngroups >= 0 && gid != groups[ngroups]);
		if (ngroups < 0) {
			warnx("you are not a member of group %s", gname);
			return;
		}
	}
	warn("%s", file);
}

void
usage(void)
{

	if (ischown)
		(void)fprintf(stderr, "%s\n%s\n",
		    "usage: chown [-fhv] [-R [-H | -L | -P]] owner[:group]"
		    " file ...",
		    "       chown [-fhv] [-R [-H | -L | -P]] :group file ...");
	else
		(void)fprintf(stderr, "%s\n",
		    "usage: chgrp [-fhv] [-R [-H | -L | -P]] group file ...");
	exit(1);
}
Commit	Line	Data
44a7a5ab A	1	/*
	2	* Copyright (c) 1988, 1993, 1994
	3	* The Regents of the University of California. All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
	13	* 3. All advertising materials mentioning features or use of this software
	14	* must display the following acknowledgement:
	15	* This product includes software developed by the University of
	16	* California, Berkeley and its contributors.
	17	* 4. Neither the name of the University nor the names of its contributors
	18	* may be used to endorse or promote products derived from this software
	19	* without specific prior written permission.
	20	*
	21	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	22	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	23	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	24	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	25	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	26	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	27	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	28	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	29	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	30	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	31	* SUCH DAMAGE.
	32	*/
	33
44a7a5ab	34	#ifndef lint
6c780a1f A	35	static const char copyright[] =
	36	"@(#) Copyright (c) 1988, 1993, 1994\n\
	37	The Regents of the University of California. All rights reserved.\n";
44a7a5ab A	38	#endif /* not lint */
	39
	40	#ifndef lint
	41	#if 0
	42	static char sccsid[] = "@(#)chown.c 8.8 (Berkeley) 4/4/94";
44a7a5ab A	43	#endif
	44	#endif /* not lint */
	45
6c780a1f A	46	#include <sys/cdefs.h>
	47	__RCSID("$FreeBSD: src/usr.sbin/chown/chown.c,v 1.24 2002/07/17 16:22:24 dwmalone Exp $");
	48
44a7a5ab A	49	#include <sys/param.h>
	50	#include <sys/stat.h>
	51
44a7a5ab A	52	#include <err.h>
44a7a5ab A	53	#include <errno.h>
44a7a5ab A	54	#include <fts.h>
	55	#include <grp.h>
	56	#include <pwd.h>
	57	#include <stdio.h>
	58	#include <stdlib.h>
	59	#include <string.h>
	60	#include <unistd.h>
	61
6c780a1f A	62	void a_gid(const char *);
	63	void a_uid(const char *);
	64	void chownerr(const char *);
	65	u_long id(const char , const char );
	66	void usage(void);
44a7a5ab A	67
	68	uid_t uid;
	69	gid_t gid;
6c780a1f A	70	int ischown;
6c780a1f A	71	const char *gname;
44a7a5ab A	72
44a7a5ab A	73	int
6c780a1f	74	main(int argc, char **argv)
44a7a5ab A	75	{
	76	FTS *ftsp;
	77	FTSENT *p;
6c780a1f A	78	int Hflag, Lflag, Rflag, fflag, hflag, vflag;
6c780a1f A	79	int ch, fts_options, rval;
44a7a5ab	80	char *cp;
44a7a5ab	81
6c780a1f A	82	cp = strrchr(argv[0], '/');
	83	cp = (cp != NULL) ? cp + 1 : argv[0];
	84	ischown = (strcmp(cp, "chown") == 0);
	85
	86	Hflag = Lflag = Rflag = fflag = hflag = vflag = 0;
	87	while ((ch = getopt(argc, argv, "HLPRfhv")) != -1)
44a7a5ab A	88	switch (ch) {
	89	case 'H':
	90	Hflag = 1;
6c780a1f	91	Lflag = 0;
44a7a5ab A	92	break;
	93	case 'L':
	94	Lflag = 1;
6c780a1f	95	Hflag = 0;
44a7a5ab A	96	break;
44a7a5ab A	97	case 'P':
44a7a5ab A	98	Hflag = Lflag = 0;
	99	break;
	100	case 'R':
	101	Rflag = 1;
	102	break;
	103	case 'f':
	104	fflag = 1;
	105	break;
	106	case 'h':
44a7a5ab	107	hflag = 1;
f383e97b	108	break;
6c780a1f A	109	case 'v':
	110	vflag = 1;
	111	break;
44a7a5ab A	112	case '?':
	113	default:
	114	usage();
	115	}
	116	argv += optind;
	117	argc -= optind;
	118
	119	if (argc < 2)
	120	usage();
	121
44a7a5ab	122	if (Rflag) {
6c780a1f A	123	fts_options = FTS_PHYSICAL;
	124	if (hflag && (Hflag \|\| Lflag))
	125	errx(1, "the -R%c and -h options may not be "
	126	"specified together", Hflag ? 'H' : 'L');
44a7a5ab A	127	if (Hflag)
44a7a5ab A	128	fts_options \|= FTS_COMFOLLOW;
6c780a1f	129	else if (Lflag) {
44a7a5ab A	130	fts_options &= ~FTS_PHYSICAL;
	131	fts_options \|= FTS_LOGICAL;
	132	}
6c780a1f A	133	} else
6c780a1f A	134	fts_options = hflag ? FTS_PHYSICAL : FTS_LOGICAL;
44a7a5ab	135
6c780a1f A	136	uid = (uid_t)-1;
6c780a1f A	137	gid = (gid_t)-1;
44a7a5ab	138	if (ischown) {
440bd198	139	if ((cp = strchr(*argv, ':')) != NULL) {
44a7a5ab A	140	*cp++ = '\0';
44a7a5ab A	141	a_gid(cp);
440bd198 A	142	}
	143	#ifdef SUPPORT_DOT
	144	else if ((cp = strchr(*argv, '.')) != NULL) {
6c780a1f	145	warnx("separation of user and group with a period is deprecated");
44a7a5ab A	146	*cp++ = '\0';
44a7a5ab A	147	a_gid(cp);
440bd198 A	148	}
440bd198 A	149	#endif
44a7a5ab	150	a_uid(*argv);
6c780a1f	151	} else
44a7a5ab A	152	a_gid(*argv);
	153
	154	if ((ftsp = fts_open(++argv, fts_options, 0)) == NULL)
6c780a1f	155	err(1, NULL);
44a7a5ab A	156
	157	for (rval = 0; (p = fts_read(ftsp)) != NULL;) {
	158	switch (p->fts_info) {
6c780a1f A	159	case FTS_D: /* Change it at FTS_DP. */
6c780a1f A	160	if (!Rflag)
44a7a5ab A	161	fts_set(ftsp, p, FTS_SKIP);
44a7a5ab A	162	continue;
6c780a1f	163	case FTS_DNR: /* Warn, chown. */
44a7a5ab A	164	warnx("%s: %s", p->fts_path, strerror(p->fts_errno));
	165	rval = 1;
	166	break;
	167	case FTS_ERR: /* Warn, continue. */
	168	case FTS_NS:
	169	warnx("%s: %s", p->fts_path, strerror(p->fts_errno));
	170	rval = 1;
	171	continue;
6c780a1f	172	case FTS_SL:
44a7a5ab A	173	case FTS_SLNONE:
	174	/*
	175	* The only symlinks that end up here are ones that
	176	* don't point to anything and ones that we found
	177	* doing a physical walk.
	178	*/
6c780a1f A	179	if (hflag)
	180	break;
	181	else
	182	continue;
44a7a5ab A	183	default:
	184	break;
	185	}
6c780a1f A	186	if ((uid == (uid_t)-1 \|\| uid == p->fts_statp->st_uid) &&
	187	(gid == (gid_t)-1 \|\| gid == p->fts_statp->st_gid))
	188	continue;
6c780a1f	189	if ((hflag ? lchown : chown)(p->fts_accpath, uid, gid) == -1) {
6c780a1f A	190	if (!fflag) {
	191	chownerr(p->fts_path);
	192	rval = 1;
	193	}
	194	} else {
	195	if (vflag)
	196	printf("%s\n", p->fts_path);
44a7a5ab A	197	}
	198	}
	199	if (errno)
	200	err(1, "fts_read");
	201	exit(rval);
	202	}
	203
	204	void
6c780a1f	205	a_gid(const char *s)
44a7a5ab A	206	{
	207	struct group *gr;
	208
	209	if (s == '\0') / Argument was "uid[:.]". */
	210	return;
	211	gname = s;
6c780a1f	212	gid = ((gr = getgrnam(s)) != NULL) ? gr->gr_gid : id(s, "group");
44a7a5ab A	213	}
	214
	215	void
6c780a1f	216	a_uid(const char *s)
44a7a5ab A	217	{
	218	struct passwd *pw;
	219
	220	if (s == '\0') / Argument was "[:.]gid". */
	221	return;
6c780a1f	222	uid = ((pw = getpwnam(s)) != NULL) ? pw->pw_uid : id(s, "user");
44a7a5ab A	223	}
	224
	225	u_long
6c780a1f	226	id(const char name, const char type)
44a7a5ab A	227	{
	228	u_long val;
	229	char *ep;
	230
	231	/*
	232	* XXX
	233	* We know that uid_t's and gid_t's are unsigned longs.
	234	*/
	235	errno = 0;
	236	val = strtoul(name, &ep, 10);
	237	if (errno)
	238	err(1, "%s", name);
	239	if (*ep != '\0')
6c780a1f	240	errx(1, "%s: illegal %s name", name, type);
44a7a5ab A	241	return (val);
	242	}
	243
	244	void
6c780a1f	245	chownerr(const char *file)
44a7a5ab	246	{
6c780a1f A	247	static uid_t euid = -1;
	248	static int ngroups = -1;
	249	gid_t groups[NGROUPS_MAX];
	250
	251	/* Check for chown without being root. */
	252	if (errno != EPERM \|\| (uid != (uid_t)-1 &&
	253	euid == (uid_t)-1 && (euid = geteuid()) != 0)) {
	254	warn("%s", file);
	255	return;
	256	}
	257
	258	/* Check group membership; kernel just returns EPERM. */
	259	if (gid != (gid_t)-1 && ngroups == -1 &&
	260	euid == (uid_t)-1 && (euid = geteuid()) != 0) {
	261	ngroups = getgroups(NGROUPS_MAX, groups);
	262	while (--ngroups >= 0 && gid != groups[ngroups]);
	263	if (ngroups < 0) {
	264	warnx("you are not a member of group %s", gname);
	265	return;
	266	}
	267	}
	268	warn("%s", file);
	269	}
	270
	271	void
	272	usage(void)
	273	{
	274
	275	if (ischown)
	276	(void)fprintf(stderr, "%s\n%s\n",
	277	"usage: chown [-fhv] [-R [-H \| -L \| -P]] owner[:group]"
	278	" file ...",
	279	" chown [-fhv] [-R [-H \| -L \| -P]] :group file ...");
	280	else
	281	(void)fprintf(stderr, "%s\n",
	282	"usage: chgrp [-fhv] [-R [-H \| -L \| -P]] group file ...");
44a7a5ab A	283	exit(1);
44a7a5ab A	284	}