sbase/chgrp.c
2013-06-09 15:20:55 +02:00

73 lines
1.0 KiB
C

#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <ftw.h>
#include <errno.h>
#include <grp.h>
#include <sys/types.h>
#include "util.h"
int gid;
int failures = 0;
static void
usage(void)
{
eprintf("usage: chgrp [-R] groupname file...\n");
}
static int
chgrp(const char *path, const struct stat *st, int f)
{
(void)f;
if(chown(path, st->st_uid, gid) == -1) {
fprintf(stderr, "chgrp: '%s': %s\n", path, strerror(errno));
failures++;
}
return 0;
}
int
main(int argc, char **argv)
{
int rflag = 0;
struct group *gr;
struct stat st;
ARGBEGIN {
case 'R':
rflag = 1;
break;
default:
usage();
} ARGEND;
if(argc<2)
usage();
gr = getgrnam(argv[0]);
if(!gr)
eprintf("chgrp: '%s': No such group\n", argv[0]);
gid = gr->gr_gid;
if(rflag) {
while(*++argv)
ftw(*argv, chgrp, FOPEN_MAX);
return 0;
}
while(*++argv) {
if(stat(*argv, &st) == -1) {
fprintf(stderr, "chgrp: '%s': %s\n", *argv,
strerror(errno));
failures++;
continue;
}
chgrp(*argv, &st, 0);
}
return failures;
}