302 lines
7.1 KiB
C
302 lines
7.1 KiB
C
/* $NetBSD: chown.c,v 1.8 2012/10/24 01:12:51 enami Exp $ */
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/*
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* Copyright (c) 1988, 1993, 1994, 2003
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT("@(#) Copyright (c) 1988, 1993, 1994, 2003\
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The Regents of the University of California. All rights reserved.");
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)chown.c 8.8 (Berkeley) 4/4/94";
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#else
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__RCSID("$NetBSD: chown.c,v 1.8 2012/10/24 01:12:51 enami Exp $");
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#endif
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <ctype.h>
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#include <dirent.h>
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#include <err.h>
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#include <errno.h>
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#include <locale.h>
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#include <fts.h>
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#include <grp.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <getopt.h>
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static void a_gid(const char *);
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static void a_uid(const char *);
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static id_t id(const char *, const char *);
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__dead static void usage(void);
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static uid_t uid;
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static gid_t gid;
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static int ischown;
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static const char *myname;
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struct option chown_longopts[] = {
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{ "reference", required_argument, 0,
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1 },
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{ NULL, 0, 0,
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0 },
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};
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int
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chown_main(int argc, char **argv)
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{
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FTS *ftsp;
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FTSENT *p;
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int Hflag, Lflag, Rflag, ch, fflag, fts_options, hflag, rval, vflag;
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char *cp, *reference;
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int (*change_owner)(const char *, uid_t, gid_t);
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setprogname(*argv);
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(void)setlocale(LC_ALL, "");
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myname = getprogname();
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ischown = (myname[2] == 'o');
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reference = NULL;
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Hflag = Lflag = Rflag = fflag = hflag = vflag = 0;
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while ((ch = getopt_long(argc, argv, "HLPRfhv",
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chown_longopts, NULL)) != -1)
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switch (ch) {
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case 1:
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reference = optarg;
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break;
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case 'H':
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Hflag = 1;
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Lflag = 0;
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break;
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case 'L':
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Lflag = 1;
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Hflag = 0;
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break;
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case 'P':
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Hflag = Lflag = 0;
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break;
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case 'R':
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Rflag = 1;
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break;
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case 'f':
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fflag = 1;
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break;
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case 'h':
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/*
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* In System V the -h option causes chown/chgrp to
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* change the owner/group of the symbolic link.
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* 4.4BSD's symbolic links didn't have owners/groups,
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* so it was an undocumented noop.
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* In NetBSD 1.3, lchown(2) is introduced.
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*/
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hflag = 1;
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break;
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case 'v':
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vflag = 1;
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break;
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case '?':
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default:
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usage();
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}
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argv += optind;
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argc -= optind;
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if (argc == 0 || (argc == 1 && reference == NULL))
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usage();
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fts_options = FTS_PHYSICAL;
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if (Rflag) {
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if (Hflag)
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fts_options |= FTS_COMFOLLOW;
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if (Lflag) {
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if (hflag)
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errx(EXIT_FAILURE,
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"the -L and -h options "
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"may not be specified together.");
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fts_options &= ~FTS_PHYSICAL;
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fts_options |= FTS_LOGICAL;
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}
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} else if (!hflag)
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fts_options |= FTS_COMFOLLOW;
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uid = (uid_t)-1;
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gid = (gid_t)-1;
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if (reference == NULL) {
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if (ischown) {
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if ((cp = strchr(*argv, ':')) != NULL) {
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*cp++ = '\0';
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a_gid(cp);
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}
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#ifdef SUPPORT_DOT
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else if ((cp = strrchr(*argv, '.')) != NULL) {
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if (uid_from_user(*argv, &uid) == -1) {
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*cp++ = '\0';
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a_gid(cp);
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}
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}
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#endif
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a_uid(*argv);
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} else
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a_gid(*argv);
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argv++;
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} else {
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struct stat st;
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if (stat(reference, &st) == -1)
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err(EXIT_FAILURE, "Cannot stat `%s'", reference);
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if (ischown)
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uid = st.st_uid;
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gid = st.st_gid;
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}
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if ((ftsp = fts_open(argv, fts_options, NULL)) == NULL)
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err(EXIT_FAILURE, "fts_open");
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for (rval = EXIT_SUCCESS; (p = fts_read(ftsp)) != NULL;) {
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change_owner = chown;
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switch (p->fts_info) {
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case FTS_D:
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if (!Rflag) /* Change it at FTS_DP. */
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fts_set(ftsp, p, FTS_SKIP);
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continue;
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case FTS_DNR: /* Warn, chown, continue. */
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warnx("%s: %s", p->fts_path, strerror(p->fts_errno));
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rval = EXIT_FAILURE;
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break;
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case FTS_ERR: /* Warn, continue. */
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case FTS_NS:
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warnx("%s: %s", p->fts_path, strerror(p->fts_errno));
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rval = EXIT_FAILURE;
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continue;
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case FTS_SL: /* Ignore unless -h. */
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/*
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* All symlinks we found while doing a physical
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* walk end up here.
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*/
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if (!hflag)
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continue;
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/*
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* Note that if we follow a symlink, fts_info is
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* not FTS_SL but FTS_F or whatever. And we should
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* use lchown only for FTS_SL and should use chown
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* for others.
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*/
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change_owner = lchown;
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break;
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case FTS_SLNONE: /* Ignore. */
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/*
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* The only symlinks that end up here are ones that
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* don't point to anything. Note that if we are
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* doing a phisycal walk, we never reach here unless
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* we asked to follow explicitly.
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*/
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continue;
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default:
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break;
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}
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if ((*change_owner)(p->fts_accpath, uid, gid) && !fflag) {
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warn("%s", p->fts_path);
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rval = EXIT_FAILURE;
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} else {
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if (vflag)
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printf("%s\n", p->fts_path);
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}
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}
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if (errno)
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err(EXIT_FAILURE, "fts_read");
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exit(rval);
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/* NOTREACHED */
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}
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static void
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a_gid(const char *s)
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{
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struct group *gr;
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if (*s == '\0') /* Argument was "uid[:.]". */
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return;
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gr = *s == '#' ? NULL : getgrnam(s);
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if (gr == NULL)
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gid = id(s, "group");
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else
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gid = gr->gr_gid;
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return;
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}
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static void
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a_uid(const char *s)
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{
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if (*s == '\0') /* Argument was "[:.]gid". */
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return;
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if (*s == '#' || uid_from_user(s, &uid) == -1) {
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uid = id(s, "user");
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}
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return;
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}
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static id_t
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id(const char *name, const char *type)
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{
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id_t val;
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char *ep;
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errno = 0;
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if (*name == '#')
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name++;
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val = (id_t)strtoul(name, &ep, 10);
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if (errno)
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err(EXIT_FAILURE, "%s", name);
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if (*ep != '\0')
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errx(EXIT_FAILURE, "%s: invalid %s name", name, type);
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return (val);
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}
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static void
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usage(void)
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{
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(void)fprintf(stderr,
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"Usage: %s [-R [-H | -L | -P]] [-fhv] %s file ...\n"
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"\t%s [-R [-H | -L | -P]] [-fhv] --reference=rfile file ...\n",
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myname, ischown ? "owner:group|owner|:group" : "group",
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myname);
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exit(EXIT_FAILURE);
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}
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