Penguin

Differences between version 2 and previous revision of ProcessGroup.

Other diffs: Previous Major Revision, Previous Author, or view the Annotated Edit History

Newer page: version 2 Last edited on Tuesday, December 31, 2002 1:32:19 am by PerryLorier Revert
Older page: version 1 Last edited on Tuesday, December 31, 2002 1:16:27 am by PerryLorier Revert
@@ -1 +1,5 @@
 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. 
+  
+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.