NetBSD/usr.sbin/chown/chown.c

225 lines
5.1 KiB
C

/*
* Copyright (c) 1988 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
char copyright[] =
"@(#) Copyright (c) 1988 Regents of the University of California.\n\
All rights reserved.\n";
#endif /* not lint */
#ifndef lint
/*static char sccsid[] = "from: @(#)chown.c 5.18 (Berkeley) 3/9/91";*/
static char rcsid[] = "$Id: chown.c,v 1.4 1994/04/01 01:19:08 jtc Exp $";
#endif /* not lint */
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/errno.h>
#include <dirent.h>
#include <fts.h>
#include <pwd.h>
#include <grp.h>
#include <unistd.h>
#include <stdio.h>
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
int ischown, uid, gid, fflag, rflag, retval;
char *gname, *myname;
main(argc, argv)
int argc;
char **argv;
{
extern int optind;
register FTS *fts;
register FTSENT *p;
register char *cp;
int ch;
myname = (cp = rindex(*argv, '/')) ? cp + 1 : *argv;
ischown = myname[2] == 'o';
while ((ch = getopt(argc, argv, "Rf")) != -1)
switch((char)ch) {
case 'R':
rflag = 1;
break;
case 'f':
fflag = 1;
break;
case '?':
default:
usage();
}
argv += optind;
argc -= optind;
if (argc < 2)
usage();
uid = gid = -1;
if (ischown) {
#ifdef SUPPORT_DOT
if (cp = index(*argv, '.')) {
*cp++ = '\0';
a_gid(cp);
} else
#endif
if (cp = index(*argv, ':')) {
*cp++ = '\0';
a_gid(cp);
}
a_uid(*argv);
}
else
a_gid(*argv);
if (rflag) {
if (!(fts = fts_open(++argv, FTS_NOSTAT|FTS_PHYSICAL, 0))) {
(void)fprintf(stderr,
"%s: %s.\n", myname, strerror(errno));
exit(1);
}
while (p = fts_read(fts)) {
if (p->fts_info == FTS_D)
continue;
if (p->fts_info == FTS_ERR) {
error(p->fts_path);
continue;
}
if (chown(p->fts_accpath, uid, gid) && !fflag)
chownerr(p->fts_path);
}
exit(retval);
}
while (*++argv)
if (chown(*argv, uid, gid) && !fflag)
chownerr(*argv);
exit(retval);
}
a_gid(s)
register char *s;
{
struct group *gr;
if (!*s) {
gid = -1; /* argument was "uid." */
return;
}
gname = s;
if (gr = getgrnam(s))
gid = gr->gr_gid;
else {
for (; *s && isdigit(*s); ++s);
if (!*s)
gid = atoi(gname);
else {
(void)fprintf(stderr, "%s: unknown group id: %s\n",
myname, gname);
exit(1);
}
}
}
a_uid(s)
register char *s;
{
struct passwd *pw;
char *uname;
if (!*s) {
uid = -1; /* argument was ".gid" */
return;
}
if (pw = getpwnam(s))
uid = pw->pw_uid;
else {
for (uname = s; *s && isdigit(*s); ++s);
if (!*s)
uid = atoi(uname);
else {
(void)fprintf(stderr,
"chown: unknown user id: %s\n", uname);
exit(1);
}
}
}
chownerr(file)
char *file;
{
static int euid = -1, ngroups = -1;
/* check for chown without being root */
if (errno != EPERM || uid != -1 && euid == -1 && (euid = geteuid())) {
if (fflag)
exit(0);
error(file);
exit(1);
}
/* check group membership; kernel just returns EPERM */
if (gid != -1 && ngroups == -1) {
gid_t groups[NGROUPS];
ngroups = getgroups(NGROUPS, groups);
while (--ngroups >= 0 && gid != groups[ngroups]);
if (ngroups < 0) {
if (fflag)
exit(0);
(void)fprintf(stderr,
"%s: you are not a member of group %s.\n",
myname, gname);
exit(1);
}
}
if (!fflag)
error(file);
}
error(name)
char *name;
{
(void)fprintf(stderr, "%s: %s: %s\n", myname, name, strerror(errno));
retval = 1;
}
usage()
{
(void)fprintf(stderr, "usage: %s [-Rf] %s file ...\n", myname,
ischown ? "[owner][:group]" : "group");
exit(1);
}