Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Document kill 0, ... #707

Closed
p5pRT opened this issue Oct 12, 1999 · 1 comment
Closed

Document kill 0, ... #707

p5pRT opened this issue Oct 12, 1999 · 1 comment

Comments

@p5pRT
Copy link

@p5pRT p5pRT commented Oct 12, 1999

Migrated from rt.perl.org#1609 (status was 'resolved')

Searchable as RT1609$

@p5pRT
Copy link
Author

@p5pRT p5pRT commented Oct 12, 1999

From mjtg@cus.cam.ac.uk

Patch is for perl5.005_03.

The remarks about Win32 are second-hand, and need checking by someone
who knows what they are talking about.

Mike Guy

Inline Patch
--- ./pod/perlport.pod.orig	Fri Feb 12 00:06:09 1999
+++ ./pod/perlport.pod	Wed Oct 13 04:09:31 1999
@@ -1321,13 +1321,15 @@
 
 Available only for socket handles. (S<RISC OS>)
 
-=item kill LIST
+=item kill SIGNAL, LIST
 
 Not implemented, hence not useful for taint checking. (S<Mac OS>,
 S<RISC OS>)
 
 Available only for process handles returned by the C<system(1, ...)>
 method of spawning a process. (Win32)
+ 
+C<kill 0, ...> kills the process. (Win32)
 
 =item link OLDFILE,NEWFILE
 
--- ./README.win32.orig	Sun Mar 28 23:36:42 1999
+++ ./README.win32	Wed Oct 13 04:02:45 1999
@@ -697,7 +697,8 @@
 C<raise()>, i.e. it doesn't send a signal to the identified process
 like it does on Unix platforms.  Instead it immediately calls
 C<TerminateProcess(process,signal)>.  Thus the signal argument is
-used to set the exit-status of the terminated process.  This behavior
+used to set the exit-status of the terminated process.  In particular,
+unlike on Unix, C<kill 0, ...> will kill the process.  This behavior
 may change in future.
 
 =item *
--- ./pod/perlfunc.pod.orig	Wed Oct 13 03:58:52 1999
+++ ./pod/perlfunc.pod	Wed Oct 13 03:54:14 1999
@@ -2066,20 +2066,22 @@
 
 See also C<each()>, C<values()> and C<sort()>.
 
-=item kill LIST
+=item kill SIGNAL, LIST
 
-Sends a signal to a list of processes.  The first element of
-the list must be the signal to send.  Returns the number of
-processes successfully signaled.
+Sends a signal to a list of processes.  Returns the number of processes
+successfully signaled.
 
     $cnt = kill 1, $child1, $child2;
     kill 9, @goners;
 
-Unlike in the shell, in Perl if the I<SIGNAL> is negative, it kills
-process groups instead of processes.  (On System V, a negative I<PROCESS>
+Unlike in the shell, in Perl if the SIGNAL is negative, it kills
+process groups instead of processes.  (On System V, a negative PROCESS
 number will also kill process groups, but that's not portable.)  That
 means you usually want to use positive not negative signals.  You may also
 use a signal name in quotes.  See L<perlipc/"Signals"> for details.
+
+If the SIGNAL is zero, no signal is sent to the process; it just checks
+that the process is alive and hasn't changed its UID.
 
 =item last LABEL
 

End of patch
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Projects
None yet
Linked pull requests

Successfully merging a pull request may close this issue.

None yet
1 participant