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:
- PROCMGR_SESSION_TCSETSID
- PROCMGR_SESSION_SETSID
- PROCMGR_SESSION_SETPGRP
- PROCMGR_SESSION_SIGNAL_PID
- PROCMGR_SESSION_SIGNAL_PGRP
- PROCMGR_SESSION_SIGNAL_LEADER
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; some of these events require certain abilities (see procmgr_ability() ) be enabled:
- 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.
Required ability: PROCMGR_AID_PGRP
- 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.
Required ability: PROCMGR_AID_SESSION
- 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.
Required ability: PROCMGR_AID_SESSION
Returns:
- 0
- Success.
- -1
- Failure (errno is set).
Classification:
Safety: | |
---|---|
Cancellation point | No |
Interrupt handler | No |
Signal handler | No |
Thread | Yes |