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procmgr_session()

Provide process manager session support

Synopsis:

#include <sys/procmgr.h>

int procmgr_session( uint32_t nd,
                     pid_t sid,
                     int id,
                     unsigned event);

Arguments:

The interpretation of the arguments depends on the event.

nd
A node descriptor.
sid
A session ID.
id
A file descriptor, process group, or signal, depending on the event.
event
The event; one of:

For more information, see below.

Library:

libc

Use the -l c option to qcc to link against this library. This library is usually included automatically.

Description:

The procmgr_session() function provides session support to character device terminal drivers in their resource managers, C library functions, and session management applications.

The arguments that you provide need to match the event:

PROCMGR_SESSION_TCSETSID
Used by the tcsetsid() function to set the file descriptor, id, to be the controlling terminal for the session headed by the session leader, sid.
PROCMGR_SESSION_SETSID
Used by the setsid() function to create a new session with the calling process becoming the session leader. Pass zero for both sid and id arguments.
PROCMGR_SESSION_SETPGRP
Used by a character device resource manager to change the process group upon the request of a client calling the tcsetpgrp() function. Set the sid argument to the client's current session and the id argument to the new target process group for the client.
PROCMGR_SESSION_SIGNAL_PID, PROCMGR_SESSION_SIGNAL_PGRP, PROCMGR_SESSION_SIGNAL_LEADER
Used by a character device resource manager to drop a signal of the type specified as the id argument (generally a terminal/job control signal) on the appropriate member of the session specified by the sid argument.

Returns:

0
Success.
-1
Failure.

Classification:

QNX Neutrino

Safety:
Cancellation point No
Interrupt handler No
Signal handler No
Thread Yes

See also:

setsid(), tcsetpgrp(), tcsetsid()


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