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/* Add a closefrom to a file action list for posix_spawn.
Copyright (C) 2021-2023 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <errno.h>
#include <spawn.h>
#include <unistd.h>
#include <spawn_int.h>
int
__posix_spawn_file_actions_addclosefrom (posix_spawn_file_actions_t
*file_actions, int from)
{
#if __SPAWN_SUPPORT_CLOSEFROM
struct __spawn_action *rec;
if (!__spawn_valid_fd (from))
return EBADF;
/* 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;
/* Add the new value. */
rec = &file_actions->__actions[file_actions->__used];
rec->tag = spawn_do_closefrom;
rec->action.closefrom_action.from = from;
/* Account for the new entry. */
++file_actions->__used;
return 0;
#else
return EINVAL;
#endif
}
weak_alias (__posix_spawn_file_actions_addclosefrom,
posix_spawn_file_actions_addclosefrom_np)
#if !__SPAWN_SUPPORT_CLOSEFROM
stub_warning (posix_spawn_file_actions_addclosefrom_np)
#endif
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