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)
