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Date: Tue, 9 Dec 1997 18:01:52 -0800 (PST)
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Subject: bin/5263: sh bug (with example)
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>Number:         5263
>Category:       bin
>Synopsis:       sh bug (with example)
>Confidential:   no
>Severity:       non-critical
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Dec  9 18:10:01 PST 1997
>Last-Modified:
>Originator:     Tom
>Organization:
SDF Systems
>Release:        FreeBSD 2.2.5-STABLE i386
>Environment:

FreeBSD 2.2.5-STABLE i386

>Description:

sh has a problem with joining lists within a "for x in list1:list2" construct.
Basically, the last element of list1 gets attached to the remaining elements of
list2, and this thing gets returned as single item.

>How-To-Repeat:

  Sample script:

#! /bin/sh

PATH=/bin:/usr/bin:/sbin

# The whitespace below is a space followed by a tab
IFS="${IFS= 	}"; ac_save_ifs="$IFS"; IFS="${IFS}:"
for ac_dir in $PATH:/usr/local/bin$ac_dummy; do
        echo "ac_dir is $ac_dir"
done


  When run under /bin/sh this script produces:

ac_dir is /bin
ac_dir is /usr/bin
ac_dir is /sbin:/usr/local/bin

  When run under bash this script produces:

ac_dir is /bin
ac_dir is /usr/bin
ac_dir is /sbin
ac_dir is /usr/local/bin


  This is a big problem for ports, as auto-conf configure scripts often use for
loops like this to scan for certain binaries.

>Fix:
	

>Audit-Trail:
>Unformatted: