1 | /* Copyright (C) 2000-2016 Free Software Foundation, Inc. |
---|---|
2 | This file is part of the GNU C Library. |
3 | |
4 | The GNU C Library is free software; you can redistribute it and/or |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either |
7 | version 2.1 of the License, or (at your option) any later version. |
8 | |
9 | The GNU C Library is distributed in the hope that it will be useful, |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 | Lesser General Public License for more details. |
13 | |
14 | You should have received a copy of the GNU Lesser General Public |
15 | License along with the GNU C Library; if not, see |
16 | <http://www.gnu.org/licenses/>. */ |
17 | |
18 | #include <errno.h> |
19 | #include <spawn.h> |
20 | #include <unistd.h> |
21 | #include <stdlib.h> |
22 | #include <string.h> |
23 | |
24 | #include "spawn_int.h" |
25 | |
26 | /* Add an action to FILE-ACTIONS which tells the implementation to call |
27 | `open' for the given file during the `spawn' call. */ |
28 | int |
29 | posix_spawn_file_actions_addopen (posix_spawn_file_actions_t *file_actions, |
30 | int fd, const char *path, int oflag, |
31 | mode_t mode) |
32 | { |
33 | int maxfd = __sysconf (_SC_OPEN_MAX); |
34 | struct __spawn_action *rec; |
35 | |
36 | /* Test for the validity of the file descriptor. */ |
37 | if (fd < 0 || fd >= maxfd) |
38 | return EBADF; |
39 | |
40 | char *path_copy = strdup (path); |
41 | if (path_copy == NULL) |
42 | return ENOMEM; |
43 | |
44 | /* Allocate more memory if needed. */ |
45 | if (file_actions->__used == file_actions->__allocated |
46 | && __posix_spawn_file_actions_realloc (file_actions) != 0) |
47 | { |
48 | /* This can only mean we ran out of memory. */ |
49 | free (path_copy); |
50 | return ENOMEM; |
51 | } |
52 | |
53 | /* Add the new value. */ |
54 | rec = &file_actions->__actions[file_actions->__used]; |
55 | rec->tag = spawn_do_open; |
56 | rec->action.open_action.fd = fd; |
57 | rec->action.open_action.path = path_copy; |
58 | rec->action.open_action.oflag = oflag; |
59 | rec->action.open_action.mode = mode; |
60 | |
61 | /* Account for the new entry. */ |
62 | ++file_actions->__used; |
63 | |
64 | return 0; |
65 | } |
66 |