/* * 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 #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 __RCSID("$FreeBSD: src/usr.sbin/chown/chown.c,v 1.24 2002/07/17 16:22:24 dwmalone Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #ifdef __APPLE__ #include #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); }