1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
|
/* vi: set sw=4 ts=4: */
/*
* Mini ln implementation for busybox
*
* Copyright (C) 1999,2000 by Lineo, inc.
* Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include "internal.h"
#define BB_DECLARE_EXTERN
#define bb_need_name_too_long
#define bb_need_not_a_directory
#include "messages.c"
#include <stdio.h>
#include <dirent.h>
#include <errno.h>
static const char ln_usage[] =
"ln [OPTION] TARGET... LINK_NAME|DIRECTORY\n"
#ifndef BB_FEATURE_TRIVIAL_HELP
"\nCreate a link named LINK_NAME or DIRECTORY to the specified TARGET\n\n"
"Options:\n"
"\t-s\tmake symbolic links instead of hard links\n"
"\t-f\tremove existing destination files\n"
"\t-n\tno dereference symlinks - treat like normal file\n"
#endif
;
static int symlinkFlag = FALSE;
static int removeoldFlag = FALSE;
static int followLinks = TRUE;
extern int ln_main(int argc, char **argv)
{
char *linkName;
int linkIntoDirFlag;
if (argc < 3) {
usage(ln_usage);
}
argc--;
argv++;
/* Parse any options */
while (**argv == '-') {
while (*++(*argv))
switch (**argv) {
case 's':
symlinkFlag = TRUE;
break;
case 'f':
removeoldFlag = TRUE;
break;
case 'n':
followLinks = FALSE;
break;
default:
usage(ln_usage);
}
argc--;
argv++;
}
linkName = argv[argc - 1];
if (strlen(linkName) > BUFSIZ) {
fprintf(stderr, name_too_long, "ln");
exit FALSE;
}
linkIntoDirFlag = isDirectory(linkName, TRUE, NULL);
if ((argc > 3) && !linkIntoDirFlag) {
fprintf(stderr, not_a_directory, "ln", linkName);
exit FALSE;
}
while (argc-- >= 2) {
char srcName[BUFSIZ + 1];
int nChars, status;
if (strlen(*argv) > BUFSIZ) {
fprintf(stderr, name_too_long, "ln");
exit FALSE;
}
if (followLinks == FALSE) {
strcpy(srcName, *argv);
} else {
/* Warning! This can silently truncate if > BUFSIZ, but
I don't think that there can be one > BUFSIZ anyway. */
nChars = readlink(*argv, srcName, BUFSIZ);
srcName[nChars] = '\0';
}
if (removeoldFlag == TRUE) {
status = (unlink(linkName) && errno != ENOENT);
if (status != 0) {
perror(linkName);
exit FALSE;
}
}
if (symlinkFlag == TRUE)
status = symlink(*argv, linkName);
else
status = link(*argv, linkName);
if (status != 0) {
perror(linkName);
exit FALSE;
}
}
exit TRUE;
}
/*
Local Variables:
c-file-style: "linux"
c-basic-offset: 4
tab-width: 4
End:
*/
|
