POSIX_SPAWN_FILE_ACTIONS_ADDDUP2(3C)POSIX_SPAWN_FILE_ACTIONS_ADDDUP2(3C)NAMEposix_spawn_file_actions_adddup2 - add dup2 action to spawn file
actions object
SYNOPSIS
#include <spawn.h>
int posix_spawn_file_actions_adddup2(
posix_spawn_file_actions_t *file_actions, int fildes,
int newfildes);
DESCRIPTION
The posix_spawn_file_actions_adddup2() function adds a dup2(3C) action
to the object referenced by file_actions that causes the file descrip‐
tor fildes to be duplicated as newfildes (as if dup2(fildes, newfildes)
had been called) when a new process is spawned using this file actions
object.
A spawn file actions object is as defined in
posix_spawn_file_actions_addclose(3C).
RETURN VALUES
Upon successful completion, the posix_spawn_file_actions_adddup2()
function returns 0. Otherwise, an error number is be returned to indi‐
cate the error.
ERRORS
The posix_spawn_file_actions_adddup2() function will fail if:
EBADF
The value specified by fildes or newfildes is negative or
greater than or equal to {OPEN_MAX}.
ENOMEM
Insufficient memory exists to add to the spawn file actions
object.
The posix_spawn_file_actions_adddup2() function may fail if:
EINVAL
The value specified by file_actions is invalid.
It is not considered an error for the fildes argument passed to
posix_spawn_file_actions_adddup2() to specify a file descriptor for
which the specified operation could not be performed at the time of the
call. Any such error will be detected when the associated file actions
object is later used during a posix_spawn(3C) or posix_spawnp(3C) oper‐
ation.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌────────────────────┬─────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├────────────────────┼─────────────────┤
│Interface Stability │ Standard │
├────────────────────┼─────────────────┤
│MT-Level │ MT-Safe │
└────────────────────┴─────────────────┘
SEE ALSOdup2(3C), posix_spawn(3C), posix_spawn_file_actions_addclose(3C),
posix_spawn_file_actions_destroy(3C), attributes(5), standards(5)
Jan 30, 2POSIX_SPAWN_FILE_ACTIONS_ADDDUP2(3C)
