87 lines
1.7 KiB
C
87 lines
1.7 KiB
C
/* See LICENSE file for copyright and license details. */
|
|
#include <sys/stat.h>
|
|
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <libgen.h>
|
|
#include <unistd.h>
|
|
|
|
#include "util.h"
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
eprintf("usage: %s [-f] [-L | -P | -s] target [name]\n"
|
|
" %s [-f] [-L | -P | -s] target ... dir\n", argv0, argv0);
|
|
}
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
char *fname, *to;
|
|
int sflag = 0, fflag = 0, hasto = 0, dirfd = AT_FDCWD, flags = AT_SYMLINK_FOLLOW;
|
|
struct stat st, tost;
|
|
|
|
ARGBEGIN {
|
|
case 'f':
|
|
fflag = 1;
|
|
break;
|
|
case 'L':
|
|
flags |= AT_SYMLINK_FOLLOW;
|
|
break;
|
|
case 'P':
|
|
flags &= ~AT_SYMLINK_FOLLOW;
|
|
break;
|
|
case 's':
|
|
sflag = 1;
|
|
break;
|
|
default:
|
|
usage();
|
|
} ARGEND;
|
|
|
|
if (!argc)
|
|
usage();
|
|
|
|
fname = sflag ? "symlink" : "link";
|
|
|
|
if (argc >= 2) {
|
|
if (!stat(argv[argc - 1], &st) && S_ISDIR(st.st_mode)) {
|
|
if ((dirfd = open(argv[argc - 1], O_RDONLY)) < 0)
|
|
eprintf("open %s:", argv[argc - 1]);
|
|
} else if (argc == 2) {
|
|
to = argv[argc - 1];
|
|
hasto = 1;
|
|
} else {
|
|
eprintf("%s: not a directory\n", argv[argc - 1]);
|
|
}
|
|
argv[argc - 1] = NULL;
|
|
argc--;
|
|
}
|
|
|
|
for (; *argv; argc--, argv++) {
|
|
if (!hasto)
|
|
to = basename(*argv);
|
|
if (fflag) {
|
|
if (stat(*argv, &st) < 0) {
|
|
weprintf("stat %s:", *argv);
|
|
continue;
|
|
} else if (fstatat(dirfd, to, &tost, AT_SYMLINK_NOFOLLOW) < 0) {
|
|
if (errno != ENOENT)
|
|
eprintf("stat %s:", to);
|
|
} else {
|
|
if (st.st_dev == tost.st_dev && st.st_ino == tost.st_ino) {
|
|
weprintf("%s and %s are the same file\n", *argv, *argv);
|
|
continue;
|
|
}
|
|
unlinkat(dirfd, to, 0);
|
|
}
|
|
}
|
|
if ((!sflag ? linkat(AT_FDCWD, *argv, dirfd, to, flags)
|
|
: symlinkat(*argv, dirfd, to)) < 0) {
|
|
weprintf("%s %s <- %s:", fname, *argv, to);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|