blob: e35bf7a033769ffc4ba2ca57943e89cdda9cf611 [file] [log] [blame]
Erik Andersene49d5ec2000-02-08 19:58:47 +00001/* vi: set sw=4 ts=4: */
Eric Andersenf6be9441999-10-13 21:12:06 +00002/*
3 * Mini ln implementation for busybox
4 *
Eric Andersen8ec10a92001-01-27 09:33:39 +00005 * Copyright (C) 1999,2000,2001 by Lineo, inc.
Eric Andersenc4996011999-10-20 22:08:37 +00006 * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
Eric Andersenf6be9441999-10-13 21:12:06 +00007 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 *
22 */
23
Eric Andersen3570a342000-09-25 21:45:58 +000024#include "busybox.h"
Erik Andersenfac10d72000-02-07 05:29:42 +000025#define BB_DECLARE_EXTERN
Erik Andersenfac10d72000-02-07 05:29:42 +000026#define bb_need_not_a_directory
27#include "messages.c"
28
Eric Andersencc8ed391999-10-05 16:24:54 +000029#include <stdio.h>
Eric Andersenf6be9441999-10-13 21:12:06 +000030#include <dirent.h>
Eric Andersened3ef502001-01-27 08:24:39 +000031#include <string.h>
32#include <stdlib.h>
Eric Andersencc8ed391999-10-05 16:24:54 +000033#include <errno.h>
Eric Andersened3ef502001-01-27 08:24:39 +000034#include <unistd.h>
Eric Andersencc8ed391999-10-05 16:24:54 +000035
Mark Whitley59ab0252001-01-23 22:30:04 +000036static const int LN_SYMLINK = 1;
37static const int LN_FORCE = 2;
38static const int LN_NODEREFERENCE = 4;
Glenn L McGrathaa3908d2000-10-04 09:34:35 +000039
40/*
41 * linkDestName is where the link points to,
42 * linkSrcName is the name of the link to be created.
43 */
Eric Andersend69d2da2001-02-15 20:12:05 +000044static int fs_link(const char *link_destname, const char *link_srcname,
45 const int flag)
Glenn L McGrathaa3908d2000-10-04 09:34:35 +000046{
47 int status;
Eric Andersend69d2da2001-02-15 20:12:05 +000048 int src_is_dir;
49 char *src_name;
Glenn L McGrathaa3908d2000-10-04 09:34:35 +000050
Eric Andersend69d2da2001-02-15 20:12:05 +000051 if (link_destname==NULL)
Glenn L McGrathaa3908d2000-10-04 09:34:35 +000052 return(FALSE);
53
Eric Andersend69d2da2001-02-15 20:12:05 +000054 src_name = (char *) xmalloc(strlen(link_srcname)+strlen(link_destname)+1);
Glenn L McGrathaa3908d2000-10-04 09:34:35 +000055
Eric Andersend69d2da2001-02-15 20:12:05 +000056 if (link_srcname==NULL)
57 strcpy(src_name, link_destname);
Glenn L McGrathaa3908d2000-10-04 09:34:35 +000058 else
Eric Andersend69d2da2001-02-15 20:12:05 +000059 strcpy(src_name, link_srcname);
Glenn L McGrathaa3908d2000-10-04 09:34:35 +000060
61 if (flag&LN_NODEREFERENCE)
Eric Andersend69d2da2001-02-15 20:12:05 +000062 src_is_dir = is_directory(src_name, TRUE, NULL);
Glenn L McGrathaa3908d2000-10-04 09:34:35 +000063 else
Eric Andersend69d2da2001-02-15 20:12:05 +000064 src_is_dir = is_directory(src_name, FALSE, NULL);
Glenn L McGrathaa3908d2000-10-04 09:34:35 +000065
Eric Andersend69d2da2001-02-15 20:12:05 +000066 if ((src_is_dir==TRUE)&&((flag&LN_NODEREFERENCE)==0)) {
67 char* srcdir_name;
68
69 srcdir_name = xstrdup(link_destname);
70 strcat(src_name, "/");
71 strcat(src_name, get_last_path_component(srcdir_name));
72 free(srcdir_name);
Glenn L McGrathaa3908d2000-10-04 09:34:35 +000073 }
74
75 if (flag&LN_FORCE)
Eric Andersend69d2da2001-02-15 20:12:05 +000076 unlink(src_name);
Glenn L McGrathaa3908d2000-10-04 09:34:35 +000077
78 if (flag&LN_SYMLINK)
Eric Andersend69d2da2001-02-15 20:12:05 +000079 status = symlink(link_destname, src_name);
Glenn L McGrathaa3908d2000-10-04 09:34:35 +000080 else
Eric Andersend69d2da2001-02-15 20:12:05 +000081 status = link(link_destname, src_name);
Glenn L McGrathaa3908d2000-10-04 09:34:35 +000082
83 if (status != 0) {
Eric Andersend69d2da2001-02-15 20:12:05 +000084 perror_msg(src_name);
Glenn L McGrathaa3908d2000-10-04 09:34:35 +000085 return(FALSE);
86 }
87 return(TRUE);
88}
Eric Andersenf6be9441999-10-13 21:12:06 +000089
90extern int ln_main(int argc, char **argv)
Eric Andersencc8ed391999-10-05 16:24:54 +000091{
Eric Andersen13241df2000-10-04 16:02:53 +000092 int status = EXIT_SUCCESS;
Glenn L McGrathaa3908d2000-10-04 09:34:35 +000093 int flag = 0;
94 int opt;
95
Erik Andersene49d5ec2000-02-08 19:58:47 +000096 /* Parse any options */
Glenn L McGrathaa3908d2000-10-04 09:34:35 +000097 while ((opt=getopt(argc, argv, "sfn")) != -1) {
98 switch(opt) {
99 case 's':
100 flag |= LN_SYMLINK;
101 break;
102 case 'f':
103 flag |= LN_FORCE;
104 break;
105 case 'n':
106 flag |= LN_NODEREFERENCE;
107 break;
108 default:
Eric Andersen67991cf2001-02-14 21:23:06 +0000109 show_usage();
Eric Andersen815e9042000-06-06 16:15:23 +0000110 }
Erik Andersenfac10d72000-02-07 05:29:42 +0000111 }
Eric Andersend69d2da2001-02-15 20:12:05 +0000112 if (optind > (argc-1)) {
113 show_usage();
114 }
115 if (optind == (argc-1)) {
116 if (fs_link(argv[optind],
117 get_last_path_component(argv[optind]), flag)==FALSE)
118 status = EXIT_FAILURE;
119 }
Glenn L McGrathaa3908d2000-10-04 09:34:35 +0000120 while(optind<(argc-1)) {
121 if (fs_link(argv[optind], argv[argc-1], flag)==FALSE)
Eric Andersen13241df2000-10-04 16:02:53 +0000122 status = EXIT_FAILURE;
Glenn L McGrathaa3908d2000-10-04 09:34:35 +0000123 optind++;
Eric Andersen815e9042000-06-06 16:15:23 +0000124 }
Eric Andersend69d2da2001-02-15 20:12:05 +0000125 exit(status);
Eric Andersencc8ed391999-10-05 16:24:54 +0000126}
Erik Andersen029011b2000-03-04 21:19:32 +0000127
128/*
129Local Variables:
130c-file-style: "linux"
131c-basic-offset: 4
132tab-width: 4
133End:
134*/