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Provide process manager session support
#include <sys/procmgr.h>
int procmgr_session( uint32_t nd,
pid_t sid,
int id,
unsigned event);
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.
libc
Use the -l c option to
qcc
to link against this library.
This library is usually included automatically.
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.
- 0
- Success.
- -1
- Failure.
QNX Neutrino
Safety: | |
Cancellation point |
No |
Interrupt handler |
No |
Signal handler |
No |
Thread |
Yes |
setsid(),
tcsetpgrp(),
tcsetsid()
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