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/* $MidnightBSD$ */ |
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/* |
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* Copyright (c) 1988, 1993, 1994 |
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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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* 4. 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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|
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#if 0 |
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#ifndef lint |
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static const char copyright[] = |
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"@(#) Copyright (c) 1988, 1993, 1994\n\ |
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The Regents of the University of California. All rights reserved.\n"; |
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#endif /* not lint */ |
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|
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#ifndef lint |
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static char sccsid[] = "@(#)chown.c 8.8 (Berkeley) 4/4/94"; |
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#endif /* not lint */ |
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#endif |
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|
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#include <sys/cdefs.h> |
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__FBSDID("$FreeBSD: stable/10/usr.sbin/chown/chown.c 283875 2015-06-01 09:04:57Z smh $"); |
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|
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#include <sys/param.h> |
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#include <sys/stat.h> |
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|
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#include <err.h> |
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#include <errno.h> |
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#include <fcntl.h> |
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#include <fts.h> |
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#include <grp.h> |
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#include <libgen.h> |
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#include <pwd.h> |
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#include <stdint.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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|
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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 void chownerr(const char *); |
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static uid_t id(const char *, const char *); |
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static void usage(void); |
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|
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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 *gname; |
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|
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int |
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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, fflag, hflag, vflag, xflag; |
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int ch, fts_options, rval; |
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char *cp; |
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|
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ischown = (strcmp(basename(argv[0]), "chown") == 0); |
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|
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Hflag = Lflag = Rflag = fflag = hflag = vflag = xflag = 0; |
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while ((ch = getopt(argc, argv, "HLPRfhvx")) != -1) |
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switch (ch) { |
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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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hflag = 1; |
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break; |
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case 'v': |
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vflag++; |
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break; |
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case 'x': |
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xflag = 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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|
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if (argc < 2) |
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usage(); |
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|
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if (Rflag) { |
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if (hflag && (Hflag || Lflag)) |
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errx(1, "the -R%c and -h options may not be " |
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"specified together", Hflag ? 'H' : 'L'); |
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if (Lflag) { |
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fts_options = FTS_LOGICAL; |
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} else { |
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fts_options = FTS_PHYSICAL; |
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|
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if (Hflag) { |
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fts_options |= FTS_COMFOLLOW; |
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} |
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} |
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} else if (hflag) { |
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fts_options = FTS_PHYSICAL; |
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} else { |
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fts_options = FTS_LOGICAL; |
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} |
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|
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if (xflag) |
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fts_options |= FTS_XDEV; |
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|
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uid = (uid_t)-1; |
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gid = (gid_t)-1; |
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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 = strchr(*argv, '.')) != NULL) { |
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warnx("separation of user and group with a period is deprecated"); |
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*cp++ = '\0'; |
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a_gid(cp); |
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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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|
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if ((ftsp = fts_open(++argv, fts_options, 0)) == NULL) |
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err(1, NULL); |
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|
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for (rval = 0; (p = fts_read(ftsp)) != NULL;) { |
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int atflag; |
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|
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if ((fts_options & FTS_LOGICAL) || |
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((fts_options & FTS_COMFOLLOW) && |
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p->fts_level == FTS_ROOTLEVEL)) |
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atflag = 0; |
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else |
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atflag = AT_SYMLINK_NOFOLLOW; |
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|
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switch (p->fts_info) { |
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case FTS_D: /* Change it at FTS_DP. */ |
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if (!Rflag) |
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fts_set(ftsp, p, FTS_SKIP); |
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continue; |
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case FTS_DNR: /* Warn, chown. */ |
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warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); |
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rval = 1; |
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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 = 1; |
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continue; |
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default: |
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break; |
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} |
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if ((uid == (uid_t)-1 || uid == p->fts_statp->st_uid) && |
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(gid == (gid_t)-1 || gid == p->fts_statp->st_gid)) |
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continue; |
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if (fchownat(AT_FDCWD, p->fts_accpath, uid, gid, atflag) |
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== -1 && !fflag) { |
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chownerr(p->fts_path); |
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rval = 1; |
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} else if (vflag) { |
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printf("%s", p->fts_path); |
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if (vflag > 1) { |
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if (ischown) { |
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printf(": %ju:%ju -> %ju:%ju", |
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(uintmax_t) |
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p->fts_statp->st_uid, |
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(uintmax_t) |
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p->fts_statp->st_gid, |
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(uid == (uid_t)-1) ? |
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(uintmax_t) |
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p->fts_statp->st_uid : |
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(uintmax_t)uid, |
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(gid == (gid_t)-1) ? |
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(uintmax_t) |
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p->fts_statp->st_gid : |
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(uintmax_t)gid); |
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} else { |
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printf(": %ju -> %ju", |
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(uintmax_t) |
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p->fts_statp->st_gid, |
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(gid == (gid_t)-1) ? |
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(uintmax_t) |
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p->fts_statp->st_gid : |
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(uintmax_t)gid); |
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} |
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} |
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printf("\n"); |
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} |
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} |
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if (errno) |
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err(1, "fts_read"); |
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exit(rval); |
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} |
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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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|
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if (*s == '\0') /* Argument was "uid[:.]". */ |
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return; |
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gname = s; |
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gid = ((gr = getgrnam(s)) != NULL) ? gr->gr_gid : id(s, "group"); |
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} |
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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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struct passwd *pw; |
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|
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if (*s == '\0') /* Argument was "[:.]gid". */ |
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return; |
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uid = ((pw = getpwnam(s)) != NULL) ? pw->pw_uid : id(s, "user"); |
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} |
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|
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static uid_t |
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id(const char *name, const char *type) |
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{ |
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uid_t val; |
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char *ep; |
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|
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/* |
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* XXX |
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* We know that uid_t's and gid_t's are unsigned longs. |
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*/ |
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errno = 0; |
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val = strtoul(name, &ep, 10); |
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if (errno || *ep != '\0') |
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errx(1, "%s: illegal %s name", name, type); |
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return (val); |
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} |
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|
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static void |
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chownerr(const char *file) |
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{ |
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static uid_t euid = -1; |
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static int ngroups = -1; |
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static long ngroups_max; |
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gid_t *groups; |
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|
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/* Check for chown without being root. */ |
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if (errno != EPERM || (uid != (uid_t)-1 && |
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euid == (uid_t)-1 && (euid = geteuid()) != 0)) { |
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warn("%s", file); |
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return; |
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} |
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|
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/* Check group membership; kernel just returns EPERM. */ |
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if (gid != (gid_t)-1 && ngroups == -1 && |
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euid == (uid_t)-1 && (euid = geteuid()) != 0) { |
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ngroups_max = sysconf(_SC_NGROUPS_MAX) + 1; |
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if ((groups = malloc(sizeof(gid_t) * ngroups_max)) == NULL) |
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err(1, "malloc"); |
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ngroups = getgroups(ngroups_max, groups); |
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while (--ngroups >= 0 && gid != groups[ngroups]); |
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free(groups); |
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if (ngroups < 0) { |
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warnx("you are not a member of group %s", gname); |
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return; |
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} |
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} |
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warn("%s", file); |
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} |
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|
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static void |
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usage(void) |
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{ |
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|
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if (ischown) |
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(void)fprintf(stderr, "%s\n%s\n", |
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"usage: chown [-fhvx] [-R [-H | -L | -P]] owner[:group]" |
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" file ...", |
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" chown [-fhvx] [-R [-H | -L | -P]] :group file ..."); |
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else |
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(void)fprintf(stderr, "%s\n", |
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"usage: chgrp [-fhvx] [-R [-H | -L | -P]] group file ..."); |
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exit(1); |
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} |
