Differences between version 4 and predecessor to the previous major change of ProcessGroup.
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| Newer page: | version 4 | Last edited on Monday, March 10, 2003 10:43:40 pm | by PerryLorier | Revert |
| Older page: | version 2 | Last edited on Tuesday, December 31, 2002 1:32:19 am | by PerryLorier | Revert |
@@ -1,5 +1,7 @@
-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 and output
: 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 a ProcessGroup
has a controlling terminal, [CLOCAL] is not set and a hangup occurs, then the ProcessGroup
is sent a [SIGHUP].
+
+
If a ProcessGroup Leader
exits, all children processes are sent a
[SIGHUP]
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.
