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- /*
- * Copyright (c) 1988 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
- char copyright[] =
- "@(#) Copyright (c) 1988 Regents of the University of California.\n\
- All rights reserved.\n";
- #endif /* not lint */
-
- #ifndef lint
- static char sccsid[] = "@(#)chown.c 5.18 (Berkeley) 3/9/91";
- #endif /* not lint */
-
- #include <sys/param.h>
- #include <sys/stat.h>
- #include <sys/errno.h>
- #include <dirent.h>
- #include <fts.h>
- #include <pwd.h>
- #include <grp.h>
- #include <unistd.h>
- #include <stdio.h>
- #include <ctype.h>
- #include <stdlib.h>
- #include <string.h>
-
- int ischown, uid, gid, fflag, rflag, retval;
- char *gname, *myname;
-
- main(argc, argv)
- int argc;
- char **argv;
- {
- extern int optind;
- register FTS *fts;
- register FTSENT *p;
- register char *cp;
- int ch;
-
- myname = (cp = rindex(*argv, '/')) ? cp + 1 : *argv;
- ischown = myname[2] == 'o';
-
- while ((ch = getopt(argc, argv, "Rf")) != EOF)
- switch((char)ch) {
- case 'R':
- rflag = 1;
- break;
- case 'f':
- fflag = 1;
- break;
- case '?':
- default:
- usage();
- }
- argv += optind;
- argc -= optind;
-
- if (argc < 2)
- usage();
-
- uid = gid = -1;
- if (ischown) {
- #ifdef SUPPORT_DOT
- if (cp = index(*argv, '.')) {
- *cp++ = '\0';
- a_gid(cp);
- } else
- #endif
- if (cp = index(*argv, ':')) {
- *cp++ = '\0';
- a_gid(cp);
- }
- a_uid(*argv);
- }
- else
- a_gid(*argv);
-
- if (rflag) {
- if (!(fts = fts_open(++argv, FTS_NOSTAT|FTS_PHYSICAL, 0))) {
- (void)fprintf(stderr,
- "%s: %s.\n", myname, strerror(errno));
- exit(1);
- }
- while (p = fts_read(fts)) {
- if (p->fts_info == FTS_D)
- continue;
- if (p->fts_info == FTS_ERR) {
- error(p->fts_path);
- continue;
- }
- if (chown(p->fts_accpath, uid, gid) && !fflag)
- chownerr(p->fts_path);
- }
- exit(retval);
- }
- while (*++argv)
- if (chown(*argv, uid, gid) && !fflag)
- chownerr(*argv);
- exit(retval);
- }
-
- a_gid(s)
- register char *s;
- {
- struct group *gr;
-
- if (!*s) {
- gid = -1; /* argument was "uid." */
- return;
- }
- gname = s;
- if (gr = getgrnam(s))
- gid = gr->gr_gid;
- else {
- for (; *s && isdigit(*s); ++s);
- if (!*s)
- gid = atoi(gname);
- else {
- (void)fprintf(stderr, "%s: unknown group id: %s\n",
- myname, gname);
- exit(1);
- }
- }
- }
-
- a_uid(s)
- register char *s;
- {
- struct passwd *pw;
- char *uname;
-
- if (!*s) {
- uid = -1; /* argument was ".gid" */
- return;
- }
- if (pw = getpwnam(s))
- uid = pw->pw_uid;
- else {
- for (uname = s; *s && isdigit(*s); ++s);
- if (!*s)
- uid = atoi(uname);
- else {
- (void)fprintf(stderr,
- "chown: unknown user id: %s\n", uname);
- exit(1);
- }
- }
- }
-
- chownerr(file)
- char *file;
- {
- static int euid = -1, ngroups = -1;
-
- /* check for chown without being root */
- if (errno != EPERM || uid != -1 && euid == -1 && (euid = geteuid())) {
- if (fflag)
- exit(0);
- error(file);
- exit(1);
- }
- /* check group membership; kernel just returns EPERM */
- if (gid != -1 && ngroups == -1) {
- int groups[NGROUPS];
-
- ngroups = getgroups(NGROUPS, groups);
- while (--ngroups >= 0 && gid != groups[ngroups]);
- if (ngroups < 0) {
- if (fflag)
- exit(0);
- (void)fprintf(stderr,
- "%s: you are not a member of group %s.\n",
- myname, gname);
- exit(1);
- }
- }
- if (!fflag)
- error(file);
- }
-
- error(name)
- char *name;
- {
- (void)fprintf(stderr, "%s: %s: %s\n", myname, name, strerror(errno));
- retval = 1;
- }
-
- usage()
- {
- (void)fprintf(stderr, "usage: %s [-Rf] %s file ...\n", myname,
- ischown ? "[owner][:group]" : "group");
- exit(1);
- }
-