mirror of https://gitee.com/openkylin/wget.git
70 lines
2.0 KiB
C
70 lines
2.0 KiB
C
|
/* Copyright (C) 2000, 2009-2019 Free Software Foundation, Inc.
|
||
|
|
This file is part of the GNU C Library.
|
||
|
|
|
||
|
|
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 3 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, see <https://www.gnu.org/licenses/>. */
|
||
|
|
|
||
|
|
#include <config.h>
|
||
|
|
|
||
|
|
/* Specification. */
|
||
|
|
#include <spawn.h>
|
||
|
|
|
||
|
|
#include <errno.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
|
||
|
|
#if !_LIBC
|
||
|
|
# define __sysconf(open_max) getdtablesize ()
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if REPLACE_POSIX_SPAWN
|
||
|
|
# include "spawn_int.h"
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* Add an action to FILE-ACTIONS which tells the implementation to call
|
||
|
|
'close' for the given file descriptor during the 'spawn' call. */
|
||
|
|
int
|
||
|
|
posix_spawn_file_actions_addclose (posix_spawn_file_actions_t *file_actions,
|
||
|
|
int fd)
|
||
|
|
#undef posix_spawn_file_actions_addclose
|
||
|
|
{
|
||
|
|
int maxfd = __sysconf (_SC_OPEN_MAX);
|
||
|
|
|
||
|
|
/* Test for the validity of the file descriptor. */
|
||
|
|
if (fd < 0 || fd >= maxfd)
|
||
|
|
return EBADF;
|
||
|
|
|
||
|
|
#if !REPLACE_POSIX_SPAWN
|
||
|
|
return posix_spawn_file_actions_addclose (file_actions, fd);
|
||
|
|
#else
|
||
|
|
/* Allocate more memory if needed. */
|
||
|
|
if (file_actions->_used == file_actions->_allocated
|
||
|
|
&& __posix_spawn_file_actions_realloc (file_actions) != 0)
|
||
|
|
/* This can only mean we ran out of memory. */
|
||
|
|
return ENOMEM;
|
||
|
|
|
||
|
|
{
|
||
|
|
struct __spawn_action *rec;
|
||
|
|
|
||
|
|
/* Add the new value. */
|
||
|
|
rec = &file_actions->_actions[file_actions->_used];
|
||
|
|
rec->tag = spawn_do_close;
|
||
|
|
rec->action.open_action.fd = fd;
|
||
|
|
|
||
|
|
/* Account for the new entry. */
|
||
|
|
++file_actions->_used;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
}
|