sbase/chown.c
2013-10-07 16:44:22 +01:00

75 lines
1.3 KiB
C

/* See LICENSE file for copyright and license details. */
#include <errno.h>
#include <grp.h>
#include <pwd.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "util.h"
static void chownpwgr(const char *);
static bool rflag = false;
static struct passwd *pw = NULL;
static struct group *gr = NULL;
static void
usage(void)
{
eprintf("usage: %s [-r] [owner][:[group]] file...\n", argv0);
}
int
main(int argc, char *argv[])
{
char *owner, *group;
ARGBEGIN {
case 'r':
rflag = true;
break;
default:
usage();
} ARGEND;
if(argc == 0)
usage();
owner = argv[0];
argv++;
if((group = strchr(owner, ':')))
*group++ = '\0';
if(owner && *owner) {
errno = 0;
pw = getpwnam(owner);
if(errno != 0)
eprintf("getpwnam %s:", owner);
else if(!pw)
eprintf("getpwnam %s: no such user\n", owner);
}
if(group && *group) {
errno = 0;
gr = getgrnam(group);
if(errno != 0)
eprintf("getgrnam %s:", group);
else if(!gr)
eprintf("getgrnam %s: no such group\n", group);
}
for(; argc > 0; argc--, argv++)
chownpwgr(argv[0]);
return EXIT_SUCCESS;
}
void
chownpwgr(const char *path)
{
if(chown(path, pw ? pw->pw_uid : (uid_t)-1,
gr ? gr->gr_gid : (gid_t)-1) == -1)
eprintf("chown %s:", path);
if(rflag)
recurse(path, chownpwgr);
}