source:
rtems/c/src/lib/libc/link.c
@
3ba74c73
Last change on this file since 3ba74c73 was 3ba74c73, checked in by Joel Sherrill <joel.sherrill@…>, on 11/01/00 at 21:08:14 | |
---|---|
|
|
File size: 2.3 KB |
Line | |
---|---|
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.OARcorp.com/rtems/license.html. |
10 | * |
11 | * $Id$ |
12 | */ |
13 | |
14 | #include <rtems.h> |
15 | #include <rtems/libio.h> |
16 | #include <errno.h> |
17 | |
18 | #include <rtems/libio_.h> |
19 | |
20 | int link( |
21 | const char *existing, |
22 | const char *new |
23 | ) |
24 | { |
25 | rtems_filesystem_location_info_t existing_loc; |
26 | rtems_filesystem_location_info_t parent_loc; |
27 | int i; |
28 | int result; |
29 | const char *name_start; |
30 | |
31 | /* |
32 | * Get the node we are linking to. |
33 | */ |
34 | |
35 | result = rtems_filesystem_evaluate_path( existing, 0, &existing_loc, TRUE ); |
36 | if ( result != 0 ) |
37 | return -1; |
38 | |
39 | /* |
40 | * Get the parent of the node we are creating. |
41 | */ |
42 | |
43 | rtems_filesystem_get_start_loc( new, &i, &parent_loc ); |
44 | |
45 | if ( !parent_loc.ops->evalformake_h ) { |
46 | rtems_filesystem_freenode( &existing_loc ); |
47 | rtems_filesystem_freenode( &parent_loc ); |
48 | set_errno_and_return_minus_one( ENOTSUP ); |
49 | } |
50 | |
51 | result = (*parent_loc.ops->evalformake_h)( &new[i], &parent_loc, &name_start ); |
52 | if ( result != 0 ) { |
53 | rtems_filesystem_freenode( &existing_loc ); |
54 | rtems_filesystem_freenode( &parent_loc ); |
55 | set_errno_and_return_minus_one( result ); |
56 | } |
57 | |
58 | /* |
59 | * Check to see if the caller is trying to link across file system |
60 | * boundaries. |
61 | */ |
62 | |
63 | if ( parent_loc.mt_entry != existing_loc.mt_entry ) { |
64 | rtems_filesystem_freenode( &existing_loc ); |
65 | rtems_filesystem_freenode( &parent_loc ); |
66 | set_errno_and_return_minus_one( EXDEV ); |
67 | } |
68 | |
69 | if ( !parent_loc.ops->link_h ) { |
70 | rtems_filesystem_freenode( &existing_loc ); |
71 | rtems_filesystem_freenode( &parent_loc ); |
72 | set_errno_and_return_minus_one( ENOTSUP ); |
73 | } |
74 | |
75 | result = (*parent_loc.ops->link_h)( &existing_loc, &parent_loc, name_start ); |
76 | |
77 | rtems_filesystem_freenode( &existing_loc ); |
78 | rtems_filesystem_freenode( &parent_loc ); |
79 | |
80 | return result; |
81 | } |
82 | |
83 | /* |
84 | * _link_r |
85 | * |
86 | * This is the Newlib dependent reentrant version of link(). |
87 | */ |
88 | |
89 | #if defined(RTEMS_NEWLIB) |
90 | |
91 | #include <reent.h> |
92 | |
93 | int _link_r( |
94 | struct _reent *ptr, |
95 | const char *existing, |
96 | const char *new |
97 | ) |
98 | { |
99 | return link( existing, new ); |
100 | } |
101 | #endif |
102 |
Note: See TracBrowser
for help on using the repository browser.