From: Jim Meyering <jim@meyering.net>
Date: Thu, 16 Jan 2003 17:33:52 +0000 (+0000)
Subject: The `regex' struct is both input and output.
X-Git-Tag: v4.5.5~186
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ba53003e9f27f5638c89d9a34325daad9f4e8a8c;p=thirdparty%2Fcoreutils.git

The `regex' struct is both input and output.
Initialize it before each use.  Patch by Tim Waugh.
---

diff --git a/m4/regex.m4 b/m4/regex.m4
index 0017507edf..3e9f866e65 100644
--- a/m4/regex.m4
+++ b/m4/regex.m4
@@ -1,4 +1,4 @@
-#serial 12
+#serial 13
 
 dnl Initially derived from code in GNU grep.
 dnl Mostly written by Jim Meyering.
@@ -22,6 +22,7 @@ AC_DEFUN([jm_INCLUDED_REGEX],
 		   jm_cv_func_working_re_compile_pattern,
       AC_TRY_RUN(
 [#include <stdio.h>
+#include <string.h>
 #include <regex.h>
 	  int
 	  main ()
@@ -30,12 +31,14 @@ AC_DEFUN([jm_INCLUDED_REGEX],
 	    const char *s;
 	    struct re_registers regs;
 	    re_set_syntax (RE_SYNTAX_POSIX_EGREP);
+	    memset (&regex, 0, sizeof (regex));
 	    [s = re_compile_pattern ("a[[:@:>@:]]b\n", 9, &regex);]
 	    /* This should fail with _Invalid character class name_ error.  */
 	    if (!s)
 	      exit (1);
 
 	    /* This should succeed, but doesn't for e.g. glibc-2.1.3.  */
+	    memset (&regex, 0, sizeof (regex));
 	    s = re_compile_pattern ("{1", 2, &regex);
 
 	    if (s)
@@ -43,6 +46,7 @@ AC_DEFUN([jm_INCLUDED_REGEX],
 
 	    /* The following example is derived from a problem report
                against gawk from Jorge Stolfi <stolfi@ic.unicamp.br>.  */
+	    memset (&regex, 0, sizeof (regex));
 	    s = re_compile_pattern ("[[anù]]*n", 7, &regex);
 	    if (s)
 	      exit (1);