Date: Thu, 1 Nov 2007 19:18:20 GMT From: Richard Seay <rick.seay@yahoo.ca> To: freebsd-gnats-submit@FreeBSD.org Subject: bin/117748: /bin/sh: Backslash quote fails in pattern for substring processing. Message-ID: <200711011918.lA1JIKHL019308@www.freebsd.org> Resent-Message-ID: <200711011920.lA1JK15Y033031@freefall.freebsd.org>
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>Number: 117748
>Category: bin
>Synopsis: /bin/sh: Backslash quote fails in pattern for substring processing.
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Thu Nov 01 19:20:01 UTC 2007
>Closed-Date:
>Last-Modified:
>Originator: Richard Seay
>Release: 6.2-RELEASE-p5
>Organization:
>Environment:
$ uname -a
FreeBSD 78NVNXM 6.2-RELEASE-p5 FreeBSD 6.2-RELEASE-p5 #0: Fri Jun 22 13:02:29 EDT 2007 root@78NVNXM:/usr/obj/usr/src/sys/KERNEL i386
>Description:
Trying to match a literal question mark in a string for substring processing, the question mark (?) in the pattern cannot be quoted.
This is what I would expect (using ksh93):
$ echo $SHELL
/usr/local/bin/ksh93
$ export s=foo?bar
$ echo $s
foo?bar
$ echo ${s%\?*}
foo
$ echo ${s#*\?}
bar
This is what happens (using sh):
$ /bin/sh
$ echo $s
foo?bar
$ echo ${s%\?*}
foo?ba
$ echo ${s#*\?}
oo?bar
Bash shows the same behaviour as ksh93.
>How-To-Repeat:
See above.
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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