Re: setting resource limits

[Peter Stephenson <pws@csr.com>]

A much nicer way of doing it is with an explicit option to give the
number of the limit.  This is more consistent with normal ulimit
behaviour.

Index: Doc/Zsh/builtins.yo
===================================================================
RCS file: /cvsroot/zsh/zsh/Doc/Zsh/builtins.yo,v
retrieving revision 1.68
diff -u -r1.68 builtins.yo
--- Doc/Zsh/builtins.yo	21 May 2004 20:04:59 -0000	1.68
+++ Doc/Zsh/builtins.yo	14 Jun 2004 15:19:24 -0000
@@ -1406,7 +1406,7 @@
 findex(ulimit)
 cindex(resource limits)
 cindex(limits, resource)
-item(tt(ulimit) [ tt(-SHacdflmnpstv) [ var(limit) ] ... ])(
+item(tt(ulimit) [ tt(-SHacdflmnpstv) [ tt(-N) var(type) ] [ var(limit) ] ... ])(
 Set or display resource limits of the shell and the processes started by
 the shell.  The value of var(limit) can be a number in the unit specified
 below or the value `tt(unlimited)'.  By default, only soft limits are
@@ -1432,6 +1432,11 @@
 sitem(tt(-v))(K-bytes on the size of virtual memory.  On some systems this
 refers to the limit called `address space'.)
 endsitem()
+
+Alternatively, the limit can be given by number using tt(-N) var(limit).
+This can be used to set a limit known to the operating system, but
+not to the shell.  Limits are typically given in the file
+tt(/usr/include/sys/resource.h), or a file included from there.
 )
 findex(umask)
 cindex(umask)
Index: Src/Builtins/rlimits.c
===================================================================
RCS file: /cvsroot/zsh/zsh/Src/Builtins/rlimits.c,v
retrieving revision 1.11
diff -u -r1.11 rlimits.c
--- Src/Builtins/rlimits.c	2 Jun 2004 22:14:47 -0000	1.11
+++ Src/Builtins/rlimits.c	14 Jun 2004 15:19:24 -0000
@@ -485,6 +485,23 @@
 		case 'S':
 		    soft = 1;
 		    continue;
+		case 'N':
+		    if (options[1]) {
+			res = (int)zstrtol(options+1, NULL, 10);
+			argv++;
+		    } else if (*argv) {
+			res = (int)zstrtol(*argv++, NULL, 10);
+		    } else {
+			zwarnnam(name, "number required after -N",
+				 NULL, 0);
+			return 1;
+		    }
+		    /*
+		     * fake it so it looks like we just finished an option...
+		     */
+		    while (options[1])
+			options++;
+		    break;
 		case 'a':
 		    if (resmask) {
 			zwarnnam(name, "no limits allowed with -a",


-- 
Peter Stephenson <pws@csr.com>                  Software Engineer
CSR Ltd., Science Park, Milton Road,
Cambridge, CB4 0WH, UK                          Tel: +44 (0)1223 692070


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