/* * 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. * * @(#) Copyright (c) 1988, 1993, 1994 The Regents of the University of California. All rights reserved. * @(#)chown.c 8.8 (Berkeley) 4/4/94 * $FreeBSD: src/usr.sbin/chown/chown.c,v 1.15.2.3 2002/08/07 21:24:33 schweikh Exp $ * $DragonFly: src/usr.sbin/chown/chown.c,v 1.8 2004/12/18 22:48:02 swildner Exp $ */ #include #include #include #include #include #include #include #include #include #include #include #include #include static void a_gid(char *); static void a_uid(char *); static void chownerr(const char *); static uid_t id(const char *, const char *); static void usage(void); static uid_t uid; static gid_t gid; static int Rflag, ischown, fflag, vflag; static char *gname, *myname; int main(int argc, char **argv) { FTS *ftsp; FTSENT *p; int Hflag, Lflag, Pflag, ch, fts_options, hflag, rval; char *cp; myname = (cp = strrchr(*argv, '/')) ? cp + 1 : *argv; ischown = myname[2] == 'o'; Hflag = Lflag = Pflag = hflag = vflag = 0; while ((ch = getopt(argc, argv, "HLPRfhv")) != -1) 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; case 'v': vflag++; break; default: usage(); } argv += optind; argc -= optind; if (argc < 2) usage(); fts_options = FTS_PHYSICAL; if (Rflag) { if (hflag && (Lflag || 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) { 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 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: /* Change it at FTS_DP. */ if (!Rflag) fts_set(ftsp, p, FTS_SKIP); continue; 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. */ if (hflag) break; else continue; default: break; } if ((uid == (uid_t)(-1) || uid == p->fts_statp->st_uid) && (gid == (gid_t)(-1) || gid == p->fts_statp->st_gid)) continue; if (hflag) { if (lchown(p->fts_accpath, uid, gid) && !fflag) { chownerr(p->fts_path); rval = 1; } else { if (vflag) printf("%s\n", p->fts_accpath); } } else { if (chown(p->fts_accpath, uid, gid) && !fflag) { chownerr(p->fts_path); rval = 1; } else { if (vflag) { printf("%s", p->fts_accpath); if (vflag > 1) { if (ischown) { printf(": %d:%d -> %d:%d", (int)p->fts_statp->st_uid, (int)p->fts_statp->st_gid, (uid == (uid_t)-1) ? (int)p->fts_statp->st_uid : (int)uid, (gid == (gid_t)-1) ? (int) p->fts_statp->st_gid : (int)gid); } else { printf(": %d -> %d", (int)p->fts_statp->st_gid, (gid == (gid_t)-1) ? (int)p->fts_statp->st_gid : (int)gid); } } printf("\n"); } } } } if (errno) err(1, "fts_read"); exit(rval); } static void a_gid(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; } static void a_uid(char *s) { struct passwd *pw; if (*s == '\0') /* Argument was "[:.]gid". */ return; uid = ((pw = getpwnam(s)) == NULL) ? id(s, "user") : pw->pw_uid; } static uid_t id(const char *name, const char *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); } static void chownerr(const char *file) { static uid_t euid = -1; static int ngroups = -1; gid_t groups[NGROUPS]; /* Check for chown without being root. */ if (errno != EPERM || (uid != (uid_t)(-1) && euid == (uid_t)(-1) && (euid = geteuid()) != 0)) err(1, "%s", file); /* Check group membership; kernel just returns EPERM. */ if (gid != (gid_t)(-1) && ngroups == -1 && euid == (uid_t)(-1) && (euid = geteuid()) != 0) { ngroups = getgroups(NGROUPS, groups); while (--ngroups >= 0 && gid != groups[ngroups]); if (ngroups < 0) errx(1, "you are not a member of group %s", gname); } warn("%s", file); } static void usage(void) { fprintf(stderr, "%s\n%s\n%s\n", "usage: chown [-R [-H | -L | -P]] [-f] [-h] [-v] owner[:group] file ...", " chown [-R [-H | -L | -P]] [-f] [-h] [-v] :group file ...", " chgrp [-R [-H | -L | -P]] [-f] [-h] [-v] group file ..."); exit(1); }