sbase/chown.c

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C
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/* See LICENSE file for copyright and license details. */
#include <errno.h>
#include <grp.h>
#include <pwd.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
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#include "util.h"
static void chownpwgr(const char *);
static int rflag = 0;
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static uid_t uid = -1;
static gid_t gid = -1;
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static int ret = 0;
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static void
usage(void)
{
eprintf("usage: %s [-Rr] [owner][:[group]] file...\n", argv0);
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}
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int
main(int argc, char *argv[])
{
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char *owner, *group, *end;
struct passwd *pw;
struct group *gr;
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ARGBEGIN {
case 'R':
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case 'r':
rflag = 1;
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break;
default:
usage();
} ARGEND;
if (argc == 0)
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usage();
owner = argv[0];
argv++;
argc--;
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 != 0)
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eprintf("getpwnam %s:", owner);
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uid = strtoul(owner, &end, 10);
if (*end != '\0')
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eprintf("getpwnam %s: no such user\n", owner);
}
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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 != 0)
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eprintf("getgrnam %s:", group);
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gid = strtoul(group, &end, 10);
if (*end != '\0')
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eprintf("getgrnam %s: no such group\n", group);
}
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}
for (; argc > 0; argc--, argv++)
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chownpwgr(argv[0]);
return ret;
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}
void
chownpwgr(const char *path)
{
if (chown(path, uid, gid) == -1) {
weprintf("chown %s:", path);
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ret = 1;
}
if (rflag)
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recurse(path, chownpwgr);
}