Annotation of src/usr.bin/readlink/readlink.c, Revision 1.9
1.3 kstailey 1: /*
1.9 ! kstailey 2: * $OpenBSD: readlink.c,v 1.8 1997/07/01 15:09:36 kstailey Exp $
1.3 kstailey 3: *
4: * Copyright (c) 1997
5: * Kenneth Stailey (hereinafter referred to as the author)
6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
15: * 3. The name of the author may not be used to endorse or promote products
16: * derived from this software without specific prior written permission.
17: *
18: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28: */
29:
1.9 ! kstailey 30: #include <limits.h>
1.1 kstailey 31: #include <stdio.h>
32: #include <unistd.h>
33:
34: int
35: main(argc, argv)
36: int argc;
37: char **argv;
38: {
39: char buf[PATH_MAX];
1.8 kstailey 40: int n, ch, nflag = 0;
41: extern int optind;
1.1 kstailey 42:
1.8 kstailey 43: while ((ch = getopt(argc, argv, "n")) != -1)
44: switch (ch) {
45: case 'n':
46: nflag = 1;
47: break;
48: default:
49: (void)fprintf(stderr,
50: "usage: readlink [-n] symlink\n");
51: exit(1);
52: }
53: argc -= optind;
54: argv += optind;
55:
56: if (argc != 1) {
57: fprintf(stderr, "usage: readlink [-n] symlink\n");
1.5 deraadt 58: exit(1);
59: }
1.1 kstailey 60:
1.8 kstailey 61: if ((n = readlink(argv[0], buf, PATH_MAX)) < 0)
1.1 kstailey 62: exit(1);
1.4 grr 63:
64: buf[n] = '\0';
65: printf("%s", buf);
1.8 kstailey 66: if (!nflag)
67: putchar('\n');
1.1 kstailey 68: exit(0);
69: }