summaryrefslogtreecommitdiffstats
path: root/file_cmds/chown/chown.c
diff options
context:
space:
mode:
Diffstat (limited to 'file_cmds/chown/chown.c')
-rw-r--r--file_cmds/chown/chown.c345
1 files changed, 345 insertions, 0 deletions
diff --git a/file_cmds/chown/chown.c b/file_cmds/chown/chown.c
new file mode 100644
index 0000000..708a6c5
--- /dev/null
+++ b/file_cmds/chown/chown.c
@@ -0,0 +1,345 @@
+/*
+ * 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.
+ */
+
+#include <sys/cdefs.h>
+#ifndef lint
+__used 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>
+#include <sys/time.h>
+
+#ifdef __APPLE__
+#include <get_compat.h>
+#else
+#define COMPAT_MODE(a,b) (1)
+#endif /* __APPLE__ */
+
+void a_gid(const char *);
+void a_uid(const char *);
+void chownerr(const char *);
+static uid_t id(const char *, const char *);
+void usage(void);
+
+uid_t uid;
+gid_t gid;
+int ischown;
+#ifdef __APPLE__
+int isnumeric = 0;
+#endif
+const char *gname;
+
+int
+main(int argc, char **argv)
+{
+ FTS *ftsp;
+ FTSENT *p;
+ int Hflag, Lflag, Pflag, Rflag, fflag, hflag, vflag;
+ int ch, fts_options, rval;
+ char *cp;
+ int unix2003_compat = 0;
+ int symlink_found = 0;
+
+ if (argc < 1)
+ usage();
+ cp = strrchr(argv[0], '/');
+ cp = (cp != NULL) ? cp + 1 : argv[0];
+ ischown = (strcmp(cp, "chown") == 0);
+
+ Hflag = Lflag = Pflag = Rflag = fflag = hflag = vflag = 0;
+#ifdef __APPLE__
+ while ((ch = getopt(argc, argv, "HLPRfhnv")) != -1)
+#else
+ while ((ch = getopt(argc, argv, "HLPRfhv")) != -1)
+#endif
+ switch (ch) {
+ case 'H':
+ Hflag = 1;
+ Lflag = Pflag = 0;
+ break;
+ case 'L':
+ Lflag = 1;
+ Hflag = Pflag = 0;
+ break;
+ case 'P':
+ Pflag = 1;
+ Hflag = Lflag = 0;
+ break;
+ case 'R':
+ Rflag = 1;
+ break;
+ case 'f':
+ fflag = 1;
+ break;
+ case 'h':
+ hflag = 1;
+ break;
+#ifdef __APPLE__
+ case 'n':
+ isnumeric = 1;
+ break;
+#endif
+ case 'v':
+ vflag = 1;
+ break;
+ case '?':
+ default:
+ usage();
+ }
+ argv += optind;
+ argc -= optind;
+
+ if (argc < 2)
+ usage();
+ if (!Rflag && (Hflag || Lflag || Pflag))
+ warnx("options -H, -L, -P only useful with -R");
+
+ 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) {
+ unix2003_compat = COMPAT_MODE("bin/chown", "Unix2003");
+ 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 {
+ unix2003_compat = COMPAT_MODE("bin/chgrp", "Unix2003");
+ a_gid(*argv);
+ }
+
+ if ((ftsp = fts_open(++argv, fts_options, 0)) == NULL)
+ err(1, NULL);
+
+ for (rval = 0; (p = fts_read(ftsp)) != NULL;) {
+ symlink_found = 0;
+ 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 {
+ symlink_found = 1;
+ if (unix2003_compat) {
+ if (Hflag || Lflag) { /* -H or -L was specified */
+ if (p->fts_errno) {
+ warnx("%s: %s", p->fts_name, strerror(p->fts_errno));
+ rval = 1;
+ continue;
+ }
+ }
+ break; /* Otherwise symlinks keep going */
+ }
+ continue;
+ }
+ default:
+ break;
+ }
+ if (unix2003_compat) {
+ /* Can only avoid updating times if both uid and gid are -1 */
+ if ((uid == (uid_t)-1) && (gid == (gid_t)-1))
+ continue;
+ } else {
+ if ((uid == (uid_t)-1 || uid == p->fts_statp->st_uid) &&
+ (gid == (gid_t)-1 || gid == p->fts_statp->st_gid))
+ continue;
+ }
+ if (((hflag || symlink_found) ? 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;
+#ifdef __APPLE__
+ gid = (!isnumeric && ((gr = getgrnam(s)) != NULL)) ? gr->gr_gid : id(s, "group");
+#else
+ gid = ((gr = getgrnam(s)) != NULL) ? gr->gr_gid : id(s, "group");
+#endif
+}
+
+void
+a_uid(const char *s)
+{
+ struct passwd *pw;
+
+ if (*s == '\0') /* Argument was "[:.]gid". */
+ return;
+#ifdef __APPLE__
+ uid = (!isnumeric && ((pw = getpwnam(s)) != NULL)) ? pw->pw_uid : id(s, "user");
+#else
+ uid = ((pw = getpwnam(s)) != NULL) ? pw->pw_uid : id(s, "user");
+#endif
+}
+
+static uid_t
+id(const char *name, const char *type)
+{
+ unsigned long val;
+ char *ep;
+
+ errno = 0;
+ val = strtoul(name, &ep, 10);
+ if (errno || *ep != '\0' || val > UID_MAX)
+ errx(1, "%s: illegal %s name", name, type);
+ return (uid_t)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",
+#ifdef __APPLE__
+ "usage: chown [-fhnv] [-R [-H | -L | -P]] owner[:group]"
+ " file ...",
+ " chown [-fhnv] [-R [-H | -L | -P]] :group file ...");
+#else
+ "usage: chown [-fhv] [-R [-H | -L | -P]] owner[:group]"
+ " file ...",
+ " chown [-fhv] [-R [-H | -L | -P]] :group file ...");
+#endif
+ else
+ (void)fprintf(stderr, "%s\n",
+#ifdef __APPLE__
+ "usage: chgrp [-fhnv] [-R [-H | -L | -P]] group file ...");
+#else
+ "usage: chgrp [-fhv] [-R [-H | -L | -P]] group file ...");
+#endif
+ exit(1);
+}
generated by cgit v1.2.3-56-ge451 (git 2.39.0) at 2024-05-18 01:48:22 +0000