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From: | Eric Blake |
Subject: | Re: New flag option request |
Date: | Thu, 20 Oct 2011 09:03:13 -0600 |
User-agent: | Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.23) Gecko/20110928 Fedora/3.1.15-1.fc14 Lightning/1.0b3pre Mnenhy/0.8.4 Thunderbird/3.1.15 |
On 10/20/2011 08:48 AM, Bruce Korb wrote:
You may have this in the queue already, but just in case: POSIX now specifies that if a standard utility has extended options, then you accomplish it with ``-W option-name[=opt-arg]''.
Not quite. POSIX specifies only that -W is reserved for implementation-defined extensions. glibc's getopt_long _happens_ to have the implementation-defined extension that '-W foo' is equivalent to '--foo', so it would make sense that bash support the same extension as glibc for consistency among GNU programs, but that is _not_ a POSIX requirement.
I wouldn't care, but I wanted to add ``--noprofile --norc'' to the command line and, for debugging purposes, I aliased "bash" to "bash -x". Oops. Two issues: 1. I'd be nice to be able to interleave short and long options, and 2. "bash -x -W noprofile -W norc" should also work.
Bash currently doesn't use getopt_long for option parsing, but rolls its own parser. A patch to make the bash parser support mixed long and short options would also be welcome in my mind.
-- Eric Blake eblake@redhat.com +1-801-349-2682 Libvirt virtualization library http://libvirt.org
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