Date: Wed, 26 Jan 2000 18:37:59 -0800 (PST) From: ryand@amazon.com To: freebsd-gnats-submit@FreeBSD.org Subject: bin/16393: /bin/sh doesn't strip comments on shebang line Message-ID: <20000127023759.19A7214E20@hub.freebsd.org>
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>Number: 16393
>Category: bin
>Synopsis: /bin/sh doesn't strip comments on shebang line
>Confidential: no
>Severity: critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Wed Jan 26 18:40:01 PST 2000
>Closed-Date:
>Last-Modified:
>Originator: Ryan Davis
>Release: 3.3-STABLE (with latest /bin/sh)
>Organization:
Amazon.com
>Environment:
FreeBSD qa-tools.amazon.com 3.3-STABLE FreeBSD 3.3-STABLE #0: Tue Jan 11 12:50:31 PST 2000 root@qa-tools.amazon.com:/usr/src/sys/compile/RWD_BSD_v3 i386
>Description:
Basically, if I follow the suggestions in the perl book to make
portably executable scripts, I must use a shebang hack where the
perl script starts being executed as a sh script. sh will pass it off
to perl. Currently sh chokes on the # after -- as the executable.
[503] x.pl
#: Can't open #
What should be happening is sh strips everything including and after
the #. With no args the file should be executed in the same sh. Then
the eval/exec will transfer responsibility to perl. This works on
DEC UNIX, linux, and several others.
>How-To-Repeat:
Run the following script:
#!/bin/sh -- # -*- perl -*-
eval "exec perl $0 -S ${1+'$@'}"
if 0;
print "1+1=", (1+1), "\n";
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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