PATCH: horror in zexecve

[Peter Stephenson <pws@xxxxxxx>]

I finally installed valgrind on my Debian laptop and it immediately
found this problem.  If "_" is not in the environment, it replaces the
NULL at then end of the environment with that, and adds a NULL at the
next memory location.  Yuk.

Index: Src/exec.c
===================================================================
RCS file: /cvsroot/zsh/zsh/Src/exec.c,v
retrieving revision 1.61
diff -u -r1.61 exec.c
--- Src/exec.c	23 Apr 2004 11:17:15 -0000	1.61
+++ Src/exec.c	21 May 2004 11:08:28 -0000
@@ -352,18 +352,13 @@
     for (eep = argv; *eep; eep++)
 	if (*eep != pth)
 	    unmetafy(*eep, NULL);
-    for (eep = environ; *eep; eep++)
-	if (**eep == '_' && (*eep)[1] == '=')
-	    break;
     buf[0] = '_';
     buf[1] = '=';
     if (*pth == '/')
 	strcpy(buf + 2, pth);
     else
 	sprintf(buf + 2, "%s/%s", pwd, pth);
-    if (!*eep)
-	eep[1] = NULL;
-    *eep = buf;
+    zputenv(buf);
     closedumps();
     execve(pth, argv, environ);
 
Index: Src/params.c
===================================================================
RCS file: /cvsroot/zsh/zsh/Src/params.c,v
retrieving revision 1.81
diff -u -r1.81 params.c
--- Src/params.c	6 Apr 2004 13:01:10 -0000	1.81
+++ Src/params.c	21 May 2004 11:08:29 -0000
@@ -3297,7 +3297,8 @@
 }
 
 
-static int
+/**/
+int
 zputenv(char *str)
 {
 #ifdef HAVE_PUTENV

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


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