blob: cd3cb4e450f86e12caa3b1ca48f183c8e29e8df2 [file] [log] [blame]
Eric Andersenf6be9441999-10-13 21:12:06 +00001/*
2 * Mini ln implementation for busybox
3 *
4 * Copyright (C) 1998 by Erik Andersen <andersee@debian.org>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
Eric Andersencc8ed391999-10-05 16:24:54 +000022#include "internal.h"
23#include <stdio.h>
Eric Andersenf6be9441999-10-13 21:12:06 +000024#include <dirent.h>
Eric Andersencc8ed391999-10-05 16:24:54 +000025#include <errno.h>
26
Eric Andersenf6be9441999-10-13 21:12:06 +000027
28static const char ln_usage[] = "ln [-s] [-f] original-name additional-name\n"
Eric Andersencc8ed391999-10-05 16:24:54 +000029"\n"
30"\tAdd a new name that refers to the same file as \"original-name\"\n"
31"\n"
32"\t-s:\tUse a \"symbolic\" link, instead of a \"hard\" link.\n"
33"\t-f:\tRemove existing destination files.\n";
34
Eric Andersenf6be9441999-10-13 21:12:06 +000035
36static int symlinkFlag = FALSE;
37static int removeoldFlag = FALSE;
38static const char *destName;
39
40
41extern int ln_main(int argc, char **argv)
Eric Andersencc8ed391999-10-05 16:24:54 +000042{
Eric Andersenf6be9441999-10-13 21:12:06 +000043 int status;
44 char newdestName[NAME_MAX];
Eric Andersencc8ed391999-10-05 16:24:54 +000045
Eric Andersenf6be9441999-10-13 21:12:06 +000046 if (argc < 3) {
47 fprintf(stderr, "Usage: %s", ln_usage);
48 exit (FALSE);
49 }
50 argc--;
51 argv++;
52
53 /* Parse any options */
54 while (**argv == '-') {
55 while (*++(*argv))
56 switch (**argv) {
57 case 's':
58 symlinkFlag = TRUE;
59 break;
60 case 'f':
61 removeoldFlag = TRUE;
62 break;
63 default:
64 fprintf(stderr, "Usage: %s\n", ln_usage);
65 exit(FALSE);
66 }
67 argc--;
68 argv++;
69 }
70
71
72 destName = argv[argc - 1];
73
74 if ((argc > 3) && !(isDirectory(destName))) {
75 fprintf(stderr, "%s: not a directory\n", destName);
76 exit (FALSE);
77 }
78
79 while (argc-- >= 2) {
80 strcpy(newdestName, destName);
81 strcat(newdestName, (*argv)+(strlen(*(++argv))));
82
83 if (removeoldFlag==TRUE ) {
84 status = ( unlink(newdestName) && errno != ENOENT );
85 if ( status != 0 ) {
86 perror(newdestName);
87 exit( FALSE);
88 }
Eric Andersencc8ed391999-10-05 16:24:54 +000089 }
Eric Andersenf6be9441999-10-13 21:12:06 +000090 if ( symlinkFlag==TRUE)
91 status = symlink(*argv, newdestName);
Eric Andersencc8ed391999-10-05 16:24:54 +000092 else
Eric Andersenf6be9441999-10-13 21:12:06 +000093 status = link(*argv, newdestName);
94 if ( status != 0 ) {
95 perror(newdestName);
96 exit( FALSE);
97 }
98 }
99 exit( TRUE);
Eric Andersencc8ed391999-10-05 16:24:54 +0000100}