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-a is not -e ?! wrong entry in "man bash" ?
From: |
Martin Willner |
Subject: |
-a is not -e ?! wrong entry in "man bash" ? |
Date: |
Tue, 04 Mar 2003 12:01:54 +0100 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.2) Gecko/20021126 |
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Hash: SHA1
Configuration Information [Automatically generated, do not change]:
Machine: i686
OS: linux-gnu
Compiler: gcc
Compilation CFLAGS: -DPROGRAM='bash' -DCONF_HOSTTYPE='i686'
- -DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='i686-pc-linux-gnu'
- -DCONF_VENDOR='pc' -DSHELL -DHAVE_CONFIG_H -I. -I. -I./include -I./lib
~ -g -O2
uname output: Linux SoL16e 2.4.20 #10 SMP Thu Feb 20 18:01:36 CET 2003
i686 unknown
Machine Type: i686-pc-linux-gnu
Bash Version: 2.05b
Patch Level: 0
Release Status: release
Description:
We have found a very strange entry in the man-page:
line 1748:
~ -a file
~ True if file exists.
line 1756:
~ -e file
~ True if file exists.
- -a and -e should do the same according to the man-page, but they dont!
if [ -a /bin/bash ] is TRUE if /bin/bash exists.
if [ ! -a /bin/bash ] should be FALSE if /bin/bash exists, BUT it
returns TRUE.
if [ -e /bin/bash ] is TRUE if /bin/bash exists.
if [ ! -e /bin/bash ] is FLASE if /bin/bash exists.
So -a is not -e as the man-page says. So what does -a really do ? Is
this a bash bug or a man-page "bug" ?
Repeat-By:
~ Using -a does not do the same as -e, even is the manpage says so.
Fix:
~ Never use -a :)
- --
MfG
~ Martin Willner
~ antitachyon - Manalo & Willner OEG
~ --------------------------------------------------------------
~ Hugogasse 1/2, 1110 Wien http://www.antitachyon.com
~ Tel: +43 (0)1 920 23 93 Fax: +43 (0)1 920 84 27
- ------------------------------------------------------------------
~ SoL - Server optimized Linux R E L E A S E D !
~ checkout http://www.sol-linux.com
- ------------------------------------------------------------------
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- -a is not -e ?! wrong entry in "man bash" ?,
Martin Willner <=