Differences between version 3 and previous revision of getpgid(2).
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| Newer page: | version 3 | Last edited on Tuesday, December 31, 2002 1:20:19 am | by PerryLorier | Revert |
| Older page: | version 2 | Last edited on Tuesday, December 31, 2002 1:15:08 am | by PerryLorier | Revert |
@@ -9,9 +9,9 @@
pid_t getpgid(pid_t__ ''pid''__);
!!DESCRIPTION
getpgid(2) returns the process group ID of the process specified by ''pid''. If ''pid'' is zero, the process ID of the current process is used.
-Process groups are used for distribution of signals, and by terminals to arbitrate requests for their input: Processes that have the same process group as the terminal are foreground and may read, while others will block with a signal if they attempt to read. These calls are thus used by programs such as csh(1) to create process groups in implementing job control. The [TIOCGPGRP] and [TIOCSPGRP] calls described in termios(4
) are used to get/set the process group of the control terminal.
+Process groups are used for distribution of signals, and by terminals to arbitrate requests for their input: Processes that have the same process group as the terminal are foreground and may read, while others will block with a signal if they attempt to read. These calls are thus used by programs such as csh(1) to create process groups in implementing job control. The [TIOCGPGRP] and [TIOCSPGRP] calls described in termios(3
) are used to get/set the process group of the control terminal.
If a session has a controlling terminal, [CLOCAL] is not set and a hangup occurs, then the session leader is sent a [SIGHUP]. If the session leader exits, the [SIGHUP] signal will be sent to each process in the foreground process group of the controlling terminal.
If the exit of the process causes a process group to become orphaned, and if any member of the newly-orphaned process group is stopped, then a [SIGHUP] signal followed by a [SIGCONT] signal will be sent to each process in the newly-orphaned process group.
