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Re: CVS update: MODIFIED: src ...


From: Derek Robert Price
Subject: Re: CVS update: MODIFIED: src ...
Date: Tue, 25 Feb 2003 11:24:03 -0500
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.0.2) Gecko/20021120 Netscape/7.01

Larry Jones wrote:

Derek Robert Price writes:
Maybe. I don't recall precisely and I might be recalling my regexp syntax. I'm going through a few other man pages now, but I can't find any good examples of either case. Can you name a few good examples or some standard I could look at?

On my system (one of the BSDs), the synopses for ar and tar are:

        ar [-]{dmpqrtx}[abcilosuvV] [membername] archive files...

        tar [-]{crtux}[befmopvwBHLPX] [tarfile] [blocksize] file1 [file2...]

and the man page for lpc uses {} extensively in the syntax of the
subcommands.  The Single Unix Specification's Utility Conventions don't
seem to mention the issue, the only option they provide is to have a
separate syntax line for each required option and that is what they do
for their ar and pax (their replacement for tar) man pages.  I don't
recall ever seeing parentheses used instead.

I think what I was probably thinking of as BNF, my usual fallback for usage specs. For lack of other input - I've been through at least a hundred man and info pages now without finding any examples, I'm using {}. We can change it later if anything else comes to light.

Incidentally, usages specifications do not seem to be addressed by the GNU coding standards, either. I did find an lpc man page on the net similar to what you described, but even the tar, pax, ar, and lpc on my system only use the multiple invocation list descriptions. That might be the way to go, but I think even that would get messy in this instance.

Derek

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