Configuration Information [Automatically generated, do not change]:
Machine: i386
OS: linux-gnu
Compiler: gcc
Compilation CFLAGS: -DPROGRAM='bash' -DCONF_HOSTTYPE='i386'
-DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='i386-redhat-linux-gnu'
-DCONF_VENDOR='redhat' -DSHELL -DHAVE_CONFIG_H -D_GNU_SOURCE
-D_FILE_OFFSET_BITS=64 -I. -I. -I./include -I./lib -I/usr/include -O2
-march=i386 -mcpu=i686
uname output: Linux grass 2.4.29 #1 Wed Mar 23 09:00:50 EST 2005 i686 unknown
Machine Type: i386-redhat-linux-gnu
Bash Version: 2.05
Patch Level: 8
Release Status: release
Description:
Empty elements in PATH (leading, trailing, or double ":"
characters have always meant "current directory". The
bash manpage makes no mention of this behavior, and the
examples given all use ":.:" to represent current
directory, leading to the impression that this is the
only way current directory can enter the command search.
The traditional behavior should be well-documented, both
to reduce confusion and to enhance security.
Repeat-By:
Fix:
The following patch is a possibility:
--- bash.1.orig Wed Aug 31 10:27:35 2005
+++ bash.1 Wed Aug 31 10:37:22 2005
@@ -1679,6 +1679,16 @@
A common value is
.if t \f(CW/usr/gnu/bin:/usr/local/bin:/usr/ucb:/bin:/usr/bin:.\fP.
.if n ``/usr/gnu/bin:/usr/local/bin:/usr/ucb:/bin:/usr/bin:.''.
+Note that empty entries in PATH (i.e. a double colon pair, or
+leading or trailing colon characters) are treated as representing
+the current directory. Thus
+.if t \f(CW:/usr/local/bin::/bin:/usr/bin:\fP
+.if n ``:/usr/local/bin::/bin:/usr/bin:''
+is equivalent to
+.if t \f(CW.:/usr/local/bin:.:/bin:/usr/bin:.\fP.
+.if n ``.:/usr/local/bin:.:/bin:/usr/bin:.''.
+(This historic behavior can be surprising, and can have security
+consequences.)
.TP
.B POSIXLY_CORRECT
If this variable is in the environment when \fBbash\fP starts, the shell
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