POSIX_SPAWN_FILE_ACTIONS_ADDDUP2(3C) Standard C Library Functions

NAME

posix_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 descriptor
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 indicate
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) operation.

ATTRIBUTES

See attributes(7) for descriptions of the following attributes:


+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Interface Stability | Standard |
+--------------------+-----------------+
|MT-Level | MT-Safe |
+--------------------+-----------------+

SEE ALSO

dup2(3C), posix_spawn(3C), posix_spawn_file_actions_addclose(3C),
posix_spawn_file_actions_destroy(3C), attributes(7), standards(7)

January 30, 2004
POSIX_SPAWN_FILE_ACTIONS_ADDDUP2(3C)