Configuration Information [Automatically generated, do not change]:
Machine: i586
OS: linux-gnu
Compiler: gcc -I/usr/src/packages/BUILD/bash-3.2
-L/usr/src/packages/BUILD/bash-3.2/../readline-5.2
Compilation CFLAGS: -DPROGRAM='bash' -DCONF_HOSTTYPE='i586'
-DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='i586-suse-linux-gnu'
-DCONF_VENDOR='suse' -DLOCALEDIR='/usr/share/locale' -DPACKAGE='bash' -DSHELL
-DHAVE_CONFIG_H -I. -I. -I./include -I./lib -O2 -march=i586 -mtune=i686
-fmessage-length=0 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector -g -D_GNU_SOURCE
-DRECYCLES_PIDS -Wall -pipe -g -fPIE -fprofile-use
uname output: Linux bow 2.6.22.13-0.3-default #1 SMP 2007/11/19 15:02:58 UTC
i686 i686 i386 GNU/Linux
Machine Type: i586-suse-linux-gnu
Bash Version: 3.2
Patch Level: 25
Release Status: release
Description:
If CDPATH is set, whenever bash changes directories to a
non-absolute path it reports the new directory to stdout.
This is done even if bash is running in non-interactive mode,
such as in a script. That breaks scripts that do things like
this:
(cd /foo/bar; do-something; cd foo; echo Important information) > bar
or, more commmonly, ones that do this:
cd /foo/bar; do-something; cd foo; echo Important information
when their output is redirected.
Repeat-By:
export CDPATH=.:..
cd /
(cd etc) > /tmp/bashcdpath
cat /tmp/bashcdpath
# /etc is shown
cat > /tmp/bashcdpathbug << EOF
#!/bin/bash
cd /etc
echo This should be the only output
cd tmp
EOF
chmod +x /tmp/bashcdpathbug
/tmp/bashcdpathbug > /tmp/bashcdpath2
wc -l /tmp/bashcdpath2
# File contains two lines when it should have only one
rm -f /tmp/bashcdpath*
Fix:
Bash should only report CDPATH status in interactive mode.
Furthermore, CDPATH status (like all such human-interest
information) should be reported to stderr, not stdout.
I would also argue that CDPATH should only be respected in
interactive mode. Otherwise, there's a potential security
hole with respect to scripts that use relative directory
changes (and potential bugs in other scripts, which is how
this problem as discovered).
