Re: setting resource limits

[Peter Stephenson <pws@csr.com>]

Oliver Kiddle wrote:
> Basically, the suggestion is that it should be possible to set resource
> limits numerically with e.g. `ulimit 4 1024'. I can see how this could
> be worth a lot to anyone implementing a new resource limit. Is that
> difficult to implement? Would it be vaguely portable?

It's easy if you impose limitations: e.g. `ulimit <number>' is treated
as setting RLIMIT_FSIZE, so you couldn't query limits like that (without an
extra option).  For example, the following (undocumented).

By the way, `ulimit -a' doesn't list the options applying to each limit
as it does in bash, so you're left guessing how to set the limit you
want.

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 13:07:16 -0000
@@ -555,7 +555,9 @@
 		}
 	    }
 	}
-	if (!*argv || **argv == '-') {
+	if (res < 0 && *argv && idigit(**argv) && argv[1])
+	    res = (int)zstrtol(*argv++, NULL, 10);
+	else if (!*argv || **argv == '-') {
 	    if (res < 0) {
 		if (*argv || nres)
 		    continue;


-- 
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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