/* * 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 char copyright[] = "@(#) Copyright (c) 1988, 1993, 1994\n\ The Regents of the University of California. All rights reserved.\n"; #endif /* not lint */ #ifndef lint /* from: static char sccsid[] = "@(#)chown.c 8.8 (Berkeley) 4/4/94"; */ static char *rcsid = "$Id: chown.c,v 1.5 1994/06/18 20:55:58 cgd Exp $"; #endif /* not lint */ #include #include #include #include #include #include #include #include #include #include #include #include #include void a_gid __P((char *)); void a_uid __P((char *)); void chownerr __P((char *)); u_long id __P((char *, char *)); void usage __P((void)); uid_t uid; gid_t gid; int Rflag, ischown, fflag; char *gname, *myname; int main(argc, argv) int argc; char *argv[]; { FTS *ftsp; FTSENT *p; int Hflag, Lflag, Pflag, ch, fts_options, hflag, rval; char *cp; myname = (cp = rindex(*argv, '/')) ? cp + 1 : *argv; ischown = myname[2] == 'o'; Hflag = Lflag = Pflag = hflag = 0; while ((ch = getopt(argc, argv, "HLPRfh")) != EOF) 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': /* * In System V (and probably POSIX.2) the -h option * causes chown/chgrp to change the owner/group of * the symbolic link. 4.4BSD's symbolic links don't * have owners/groups, so it's an undocumented noop. * Do syntax checking, though. */ hflag = 1; break; case '?': default: usage(); } argv += optind; argc -= optind; if (argc < 2) usage(); fts_options = FTS_PHYSICAL; if (Rflag) { if (hflag) errx(1, "the -R and -h options may not be specified together."); if (Hflag) fts_options |= FTS_COMFOLLOW; if (Lflag) { fts_options &= ~FTS_PHYSICAL; fts_options |= FTS_LOGICAL; } } uid = gid = -1; if (ischown) { #ifdef SUPPORT_DOT if ((cp = strchr(*argv, '.')) != NULL) { *cp++ = '\0'; a_gid(cp); } else #endif if ((cp = strchr(*argv, ':')) != NULL) { *cp++ = '\0'; a_gid(cp); } 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: if (Rflag) /* Change it at FTS_DP. */ continue; fts_set(ftsp, p, FTS_SKIP); break; case FTS_DNR: /* Warn, chown, continue. */ 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: /* Ignore. */ 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. */ continue; default: break; } if (chown(p->fts_accpath, uid, gid) && !fflag) { chownerr(p->fts_path); rval = 1; } } if (errno) err(1, "fts_read"); exit(rval); } void a_gid(s) char *s; { struct group *gr; if (*s == '\0') /* Argument was "uid[:.]". */ return; gname = s; gid = ((gr = getgrnam(s)) == NULL) ? id(s, "group") : gr->gr_gid; } void a_uid(s) char *s; { struct passwd *pw; if (*s == '\0') /* Argument was "[:.]gid". */ return; uid = ((pw = getpwnam(s)) == NULL) ? id(s, "user") : pw->pw_uid; } u_long id(name, type) char *name, *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(file) char *file; { static int euid = -1, ngroups = -1; gid_t groups[NGROUPS]; /* Check for chown without being root. */ if (errno != EPERM || uid != -1 && euid == -1 && (euid = geteuid()) != 0) { if (fflag) exit(0); err(1, "%s", file); } /* Check group membership; kernel just returns EPERM. */ if (gid != -1 && ngroups == -1) { ngroups = getgroups(NGROUPS, groups); while (--ngroups >= 0 && gid != groups[ngroups]); if (ngroups < 0) { if (fflag) exit(0); errx(1, "you are not a member of group %s", gname); } } if (!fflag) warn("%s", file); } void usage() { (void)fprintf(stderr, "usage: %s [-R [-H | -L | -P]] [-f] %s file ...\n", myname, ischown ? "[owner][:group]" : "group"); exit(1); }