Date: Fri, 22 Nov 2002 18:22:22 +0900 (JST) From: Hideo Kogoe <Hideo.Kogoe@Sun.COM> To: FreeBSD-gnats-submit@FreeBSD.org Cc: Hideo Kogoe <Hideo.Kogoe@Sun.COM> Subject: bin/45584: read builtin function of sh does not read standard input Message-ID: <200211220922.gAM9MMcw095649@vaio.Japan.Sun.COM>
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>Number: 45584
>Category: bin
>Synopsis: read builtin function of sh does not read standard input
>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: Fri Nov 22 01:30:01 PST 2002
>Closed-Date:
>Last-Modified:
>Originator: Hideo Kogoe
>Release: FreeBSD 4.7-RELEASE i386
>Organization:
Sun Microsystems K.K.
>Environment:
System: FreeBSD vaio.Japan.Sun.COM 4.7-RELEASE FreeBSD 4.7-RELEASE #0: Mon Nov 18 14:46:18 JST 2002 root@vaio.Japan.Sun.COM:/usr/src/sys/compile/VAIO i386
SONY VAIO PCG-R505R/GK running a customer kernel
>Description:
The read builtin function of /bin/sh does not read the
standard input correctly. Refer to the How-To-Repeat
section.
>How-To-Repeat:
$ echo Hello | read line; echo $line
$ echo Hello | while read line; do echo $line; done
Hello
$
Just for reference, on Solaris, for example,
$ echo Hello | read line; echo $line
Hello
$ echo Hello | while read line; do echo $line; done
Hello
$
Accroding to the specification of POSIX shell, the read
function doesn't behave correctly.
>Fix:
Putting them into a sub-shell seems to work fine.
$ echo Hello | (read line; echo $line)
Hello
$
>Release-Note:
>Audit-Trail:
>Unformatted:
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