diff options
Diffstat (limited to 'usr.sbin/chown/chown.c')
| -rw-r--r-- | usr.sbin/chown/chown.c | 273 |
1 files changed, 273 insertions, 0 deletions
diff --git a/usr.sbin/chown/chown.c b/usr.sbin/chown/chown.c new file mode 100644 index 0000000..9121777 --- /dev/null +++ b/usr.sbin/chown/chown.c @@ -0,0 +1,273 @@ +/* + * 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 +static char sccsid[] = "@(#)chown.c 8.8 (Berkeley) 4/4/94"; +#endif /* not lint */ + +#include <sys/param.h> +#include <sys/stat.h> + +#include <ctype.h> +#include <dirent.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> + +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; + int 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); +} |
