Skip site navigation (1)Skip section navigation (2)
Date:      12 Jun 2002 18:08:27 -0000
From:      Joe Kelsey <joek@mail.flyingcroc.net>
To:        FreeBSD-gnats-submit@FreeBSD.org
Subject:   bin/39198: sh aborts on variables with periods
Message-ID:  <20020612180827.82491.qmail@unx48.staff.flyingcroc.net>

next in thread | raw e-mail | index | archive | help

>Number:         39198
>Category:       bin
>Synopsis:       sh aborts on variables with periods
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Jun 12 11:10:01 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator:     Joe Kelsey
>Release:        FreeBSD 4.6-RC i386
>Organization:
>Environment:
System: FreeBSD unx48.staff.flyingcroc.net 4.6-RC FreeBSD 4.6-RC #11: Wed Jun 12 08:37:42 PDT 2002 joek@unx48.staff.flyingcroc.net:/usr/obj/usr/src/sys/UNX48 i386

>Description:
	/bin/sh does not gracefully accept variables with periods.

	ksh93 has a new feature of structured variables.  These are
	variables that behave like C structures.  Along with this new
	feature, where sub-variables are separated by periods, ksh also
	allows variables to begin with periods.

	This causes a problem in compatibility.  If your login shell is
	ksh93, and you set ENV=~/.ksh93, then when you su, /bin/sh will
	try to process your ENV file and issue the error message:
Syntax error: Bad substitution.
	when it tries to process the following line:

	if [ -n "$KSH_VERSION"] || [ -n "${.sh.version}" ]
	then
	  # ksh-only stuff
	fi

	Either /bin/sh has to allow parameters to contain periods or it
	has to provide a reliable method of detecting /bin/sh versus
	ksh.

>How-To-Repeat:
	See above
>Fix:

	Change the is_name and is_in_name macros to allow periods in
	addition to underscores.



>Release-Note:
>Audit-Trail:
>Unformatted:

To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-bugs" in the body of the message




Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20020612180827.82491.qmail>