Re: "ulimit -c junk" silently treated as "ulimit -c 0"

[Peter Stephenson <pws@csr.com>]

> "ulimit -c junk" silently treated as "ulimit -c 0"

Yes, that's quite poor.

Index: Src/Builtins/rlimits.c
===================================================================
RCS file: /cvsroot/zsh/zsh/Src/Builtins/rlimits.c,v
retrieving revision 1.20
diff -u -r1.20 rlimits.c
--- Src/Builtins/rlimits.c	6 Jul 2007 21:52:40 -0000	1.20
+++ Src/Builtins/rlimits.c	5 Jan 2010 15:49:59 -0000
@@ -680,7 +680,7 @@
 bin_ulimit(char *name, char **argv, UNUSED(Options ops), UNUSED(int func))
 {
     int res, resmask = 0, hard = 0, soft = 0, nres = 0, all = 0, ret = 0;
-    char *options;
+    char *options, *eptr, *number;
 
     do {
 	options = *argv;
@@ -704,13 +704,18 @@
 		    continue;
 		case 'N':
 		    if (options[1]) {
-			res = (int)zstrtol(options+1, NULL, 10);
+			number = options + 1;
 		    } else if (*argv) {
-			res = (int)zstrtol(*argv++, NULL, 10);
+			number = *argv++;
 		    } else {
 			zwarnnam(name, "number required after -N");
 			return 1;
 		    }
+		    res = (int)zstrtol(number, &eptr, 10);
+		    if (*eptr) {
+			zwarnnam(name, "invalid number: %s", number);
+			return 1;
+		    }
 		    /*
 		     * fake it so it looks like we just finished an option...
 		     */
@@ -831,38 +836,43 @@
 	    /* set limit to specified value */
 	    rlim_t limit;
 
-	    limit = zstrtorlimt(*argv, NULL, 10);
-	    /* scale appropriately */
-	    switch (res) {
-	    case RLIMIT_FSIZE:
-	    case RLIMIT_CORE:
-		limit *= 512;
-		break;
-	    case RLIMIT_DATA:
-	    case RLIMIT_STACK:
+	    limit = zstrtorlimt(*argv, &eptr, 10);
+	    if (*eptr) {
+		zwarnnam(name, "invalid number: %s", *argv);
+		ret++;
+	    } else {
+		/* scale appropriately */
+		switch (res) {
+		case RLIMIT_FSIZE:
+		case RLIMIT_CORE:
+		    limit *= 512;
+		    break;
+		case RLIMIT_DATA:
+		case RLIMIT_STACK:
 # ifdef HAVE_RLIMIT_RSS
-	    case RLIMIT_RSS:
+		case RLIMIT_RSS:
 # endif /* HAVE_RLIMIT_RSS */
 # ifdef HAVE_RLIMIT_MEMLOCK
-	    case RLIMIT_MEMLOCK:
+		case RLIMIT_MEMLOCK:
 # endif /* HAVE_RLIMIT_MEMLOCK */
 /* If RLIMIT_VMEM and RLIMIT_RSS are defined and equal, avoid *
  * duplicate case statement.  Observed on QNX Neutrino 6.1.0. */
 # if defined(HAVE_RLIMIT_VMEM) && !defined(RLIMIT_VMEM_IS_RSS)
-	    case RLIMIT_VMEM:
+		case RLIMIT_VMEM:
 # endif /* HAVE_RLIMIT_VMEM */
 /* ditto RLIMIT_VMEM and RLIMIT_AS */
 # if defined(HAVE_RLIMIT_AS) && !defined(RLIMIT_VMEM_IS_AS) && !defined(RLIMIT_RSS_IS_AS)
-	    case RLIMIT_AS:
+		case RLIMIT_AS:
 # endif /* HAVE_RLIMIT_AS */
 # ifdef HAVE_RLIMIT_AIO_MEM
-	    case RLIMIT_AIO_MEM:
+		case RLIMIT_AIO_MEM:
 # endif /* HAVE_RLIMIT_AIO_MEM */
-		limit *= 1024;
-		break;
+		    limit *= 1024;
+		    break;
+		}
+		if (do_limit(name, res, limit, hard, soft, 1))
+		    ret++;
 	    }
-	    if (do_limit(name, res, limit, hard, soft, 1))
-		ret++;
 	} else {
 	    if (do_unlimit(name, res, hard, soft, 1, geteuid()))
 		ret++;

-- 
Peter Stephenson <pws@csr.com>            Software Engineer
Tel: +44 (0)1223 692070                   Cambridge Silicon Radio Limited
Churchill House, Cambridge Business Park, Cowley Road, Cambridge, CB4 0WZ, UK


Member of the CSR plc group of companies. CSR plc registered in England and Wales, registered number 4187346, registered office Churchill House, Cambridge Business Park, Cowley Road, Cambridge, CB4 0WZ, United Kingdom