Configuration Information [Automatically generated, do not change]:
Machine: i386
OS: linux-gnu
Compiler: i386-redhat-linux-gcc
Compilation CFLAGS: -DPROGRAM='bash' -DCONF_HOSTTYPE='i386'
-DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='i386-redhat-linux-gnu'
-DCONF_VENDOR='redhat' -DLOCALEDIR='/usr/share/locale' -DPACKAGE='bash' -DSHELL
-DHAVE_CONFIG_H -I. -I. -I./include -I./lib -D_GNU_SOURCE
-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -O2 -Wall -g -pipe
-Wp,-D_FORTIFY_SOURCE=2 -m32 -march=i386 -mtune=pentium4
uname output: Linux gene.surrey.redhat.com 2.6.11-1.1176_FC4 #1 Mon Mar 7
02:10:55 EST 2005 i686 i686 i386 GNU/Linux
Machine Type: i386-redhat-linux-gnu
Bash Version: 3.0
Patch Level: 16
Release Status: release
Description:
If PS1 contains '\W' but PWD becomes unset, for instance by
'unset PWD', bash segfaults. This is because the code
handling \W uses the result of get_string_value even if it is
NULL.
However, earlier in the code it does check for NULL and takes
appropriate action, so a guaranteed non-NULL version of the
result is already available. The fix is to use it.
Repeat-By:
PS1='\W'
unset PWD
Fix:
--- bash-3.0/parse.y.pwd 2005-03-15 14:22:36.000000000 +0000
+++ bash-3.0/parse.y 2005-03-15 14:22:37.000000000 +0000
@@ -4103,7 +4103,7 @@
#define ROOT_PATH(x) ((x)[0] == '/' && (x)[1] == 0)
#define DOUBLE_SLASH_ROOT(x) ((x)[0] == '/' && (x)[1] == '/' && (x)[2] == 0)
/* Abbreviate \W as ~ if $PWD == $HOME */
- if (c == 'W' && (((t = get_string_value ("HOME")) == 0) ||
STREQ (t, temp) == 0))
+ if (c == 'W' && (((t = get_string_value ("HOME")) == 0) ||
STREQ (t, t_string) == 0))
{
if (ROOT_PATH (t_string) == 0 && DOUBLE_SLASH_ROOT
(t_string) == 0)
{
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