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