sbase/chown.c

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/* See LICENSE file for copyright and license details. */
#include <errno.h>
#include <grp.h>
#include <limits.h>
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#include <pwd.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
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#include "util.h"
static int hflag = 0;
static int Rflag = 0;
static uid_t uid = -1;
static gid_t gid = -1;
static int ret = 0;
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static void
chownpwgr(const char *path, int depth)
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{
char *chownf_name;
int (*chownf)(const char *, uid_t, gid_t);
if (recurse_follow == 'P' || (recurse_follow == 'H' && depth) || (hflag && !depth)) {
chownf_name = "lchown";
chownf = lchown;
} else {
chownf_name = "chown";
chownf = chown;
}
if (chownf(path, uid, gid) < 0) {
weprintf("%s %s:", chownf_name, path);
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ret = 1;
} else if (Rflag) {
recurse(path, chownpwgr, depth);
}
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}
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static void
usage(void)
{
eprintf("usage: %s [-h] [-R [-H | -L | -P]] [owner][:[group]] file ...\n", argv0);
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}
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int
main(int argc, char *argv[])
{
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struct passwd *pw;
struct group *gr;
char *owner, *group;
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ARGBEGIN {
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case 'h':
hflag = 1;
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break;
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case 'r':
case 'R':
Rflag = 1;
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break;
case 'H':
case 'L':
case 'P':
recurse_follow = ARGC();
break;
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default:
usage();
} ARGEND;
if (argc < 2)
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usage();
owner = argv[0];
if ((group = strchr(owner, ':')))
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*group++ = '\0';
if (owner && *owner) {
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errno = 0;
pw = getpwnam(owner);
if (pw) {
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uid = pw->pw_uid;
} else {
if (errno)
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eprintf("getpwnam %s:", owner);
uid = estrtonum(owner, 0, UINT_MAX);
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}
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}
if (group && *group) {
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errno = 0;
gr = getgrnam(group);
if (gr) {
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gid = gr->gr_gid;
} else {
if (errno)
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eprintf("getgrnam %s:", group);
gid = estrtonum(group, 0, UINT_MAX);
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}
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}
for (argc--, argv++; *argv; argc--, argv++)
chownpwgr(*argv, 0);
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return ret;
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}