1 | /* |
---|
2 | * link() - POSIX 1003.1b - 5.3.4 - Create a new link |
---|
3 | * |
---|
4 | * COPYRIGHT (c) 1989-1999. |
---|
5 | * On-Line Applications Research Corporation (OAR). |
---|
6 | * |
---|
7 | * The license and distribution terms for this file may be |
---|
8 | * found in the file LICENSE in this distribution or at |
---|
9 | * http://www.rtems.com/license/LICENSE. |
---|
10 | */ |
---|
11 | |
---|
12 | #if HAVE_CONFIG_H |
---|
13 | #include "config.h" |
---|
14 | #endif |
---|
15 | |
---|
16 | #include <unistd.h> |
---|
17 | |
---|
18 | #include <rtems/libio_.h> |
---|
19 | |
---|
20 | int link( const char *path1, const char *path2 ) |
---|
21 | { |
---|
22 | int rv = 0; |
---|
23 | rtems_filesystem_eval_path_context_t ctx_1; |
---|
24 | rtems_filesystem_eval_path_context_t ctx_2; |
---|
25 | int eval_flags_1 = RTEMS_FS_FOLLOW_LINK; |
---|
26 | int eval_flags_2 = RTEMS_FS_FOLLOW_LINK |
---|
27 | | RTEMS_FS_MAKE |
---|
28 | | RTEMS_FS_EXCLUSIVE; |
---|
29 | const rtems_filesystem_location_info_t *currentloc_1 = |
---|
30 | rtems_filesystem_eval_path_start( &ctx_1, path1, eval_flags_1 ); |
---|
31 | const rtems_filesystem_location_info_t *currentloc_2 = |
---|
32 | rtems_filesystem_eval_path_start( &ctx_2, path2, eval_flags_2 ); |
---|
33 | |
---|
34 | rv = rtems_filesystem_location_exists_in_same_fs_instance_as( |
---|
35 | currentloc_1, |
---|
36 | currentloc_2 |
---|
37 | ); |
---|
38 | if ( rv == 0 ) { |
---|
39 | rv = (*currentloc_2->mt_entry->ops->link_h)( |
---|
40 | currentloc_2, |
---|
41 | currentloc_1, |
---|
42 | rtems_filesystem_eval_path_get_token( &ctx_2 ), |
---|
43 | rtems_filesystem_eval_path_get_tokenlen( &ctx_2 ) |
---|
44 | ); |
---|
45 | } |
---|
46 | |
---|
47 | rtems_filesystem_eval_path_cleanup( &ctx_1 ); |
---|
48 | rtems_filesystem_eval_path_cleanup( &ctx_2 ); |
---|
49 | |
---|
50 | return rv; |
---|
51 | } |
---|
52 | |
---|
53 | /* |
---|
54 | * _link_r |
---|
55 | * |
---|
56 | * This is the Newlib dependent reentrant version of link(). |
---|
57 | */ |
---|
58 | |
---|
59 | #if defined(RTEMS_NEWLIB) |
---|
60 | |
---|
61 | #include <reent.h> |
---|
62 | |
---|
63 | int _link_r( |
---|
64 | struct _reent *ptr __attribute__((unused)), |
---|
65 | const char *path1, |
---|
66 | const char *path2 |
---|
67 | ) |
---|
68 | { |
---|
69 | return link( path1, path2 ); |
---|
70 | } |
---|
71 | #endif |
---|