Re: Command line arguments

From	glen herrmannsfeldt <gah@ugcs.caltech.edu>
Newsgroups	comp.lang.c
Subject	Re: Command line arguments
Date	2013-01-12 01:38 +0000
Organization	Aioe.org NNTP Server
Message-ID	<kcqerj$9nt$1@speranza.aioe.org> (permalink)
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Ben Bacarisse <ben.usenet@bsb.me.uk> wrote:

(snip, someone wrote)
>>>> I don't think anyone is arguing that globbing is not helpful - in many
>>>> cases it is, but it's the wrong thing sometimes, and *nix has no good
>>>> way for a program to bypass it (and turning it off in the shell
>>>> doesn't count).

> Shells do all sorts of special processing before executing a program.
> Are you making a special case for file globing, or would you like a
> program to be able to "reach out" and bypass all or any of the others
> (IO redirection, parameter expansion, command substitution, the various
> quotes and word splitting, and so on)?

Well, with many shells I can type

!!

and run the previous command again. I certainly don't expect 
the program to see the !! and know what the previous arguments
were.

Even more, I can type

ls !*

So, some processing has to be done before the program is run.

>>>>  You can't even access the raw command line to roll
>>>> your own if you wanted.

(snip)
>> While it might be difficult to do at this late date, requiring a shell
>> to support that wouldn't be a big deal.

> You'd have to decide what constitutes the raw command.  If you say it's
> just what was typed, a program would need a complex parser just to work
> out what it's first argument is!  If you mean the command just before
> file globing is done, then I'd ask again what makes globing the special
> case?

Yes, one of the fun things about unix are programs that recognize the
name that they are called with and do things differently.

On my system, gzip, gunzip, and gzcat are all the same program.
With either a hard or symbolic link, argv[0] is the name actually
types, but aliases are replaced before argv[0] is generated.

Some (not unix) command line parsers upper case the whole line
before processing it. Many programs need the line in the original
case.

-- glen

Thread

Command line arguments "BartC" <bc@freeuk.com> - 2013-01-10 20:58 +0000
  Re: Command line arguments pu <uselpa.list@gmail.com> - 2013-01-10 22:02 +0100
    Re: Command line arguments pu <uselpa.list@gmail.com> - 2013-01-11 14:43 +0100
      Re: Command line arguments glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2013-01-11 19:10 +0000
  Re: Command line arguments Willem <willem@turtle.stack.nl> - 2013-01-10 21:02 +0000
    Re: Command line arguments "BartC" <bc@freeuk.com> - 2013-01-10 21:34 +0000
      Re: Command line arguments Jorgen Grahn <grahn+nntp@snipabacken.se> - 2013-01-10 22:02 +0000
      Re: Command line arguments Greg Martin <greg@softsprocket.com> - 2013-01-10 14:13 -0800
        Re: Command line arguments "BartC" <bc@freeuk.com> - 2013-01-10 22:32 +0000
          Re: Command line arguments Lew Pitcher <lpitcher@teksavvy.com> - 2013-01-10 17:49 -0500
            Re: Command line arguments BruceS <bruces42@hotmail.com> - 2013-01-10 16:05 -0700
              Re: Command line arguments Lew Pitcher <lpitcher@teksavvy.com> - 2013-01-10 18:15 -0500
              Re: Command line arguments JohnF <john@please.see.sig.for.email.com> - 2013-01-11 06:54 +0000
                Re: Command line arguments Shao Miller <sha0.miller@gmail.com> - 2013-01-11 02:26 -0500
                Re: Command line arguments glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2013-01-11 09:02 +0000
                Re: Command line arguments Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2013-01-11 11:17 -0700
                Re: Command line arguments Shao Miller <sha0.miller@gmail.com> - 2013-01-11 13:20 -0500
                Re: Command line arguments Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2013-01-11 13:13 -0700
                Re: Command line arguments glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2013-01-11 19:22 +0000
                Re: Command line arguments Fred K <fred.l.kleinschmidt@gmail.com> - 2013-01-11 14:42 -0800
                Re: Command line arguments glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2013-01-12 01:22 +0000
                Re: Command line arguments Ben Bacarisse <ben.usenet@bsb.me.uk> - 2013-01-12 01:39 +0000
                Re: Command line arguments glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2013-01-12 03:16 +0000
                Re: Command line arguments Keith Thompson <kst-u@mib.org> - 2013-01-12 09:49 -0800
                Re: Command line arguments JohnF <john@please.see.sig.for.email.com> - 2013-01-12 04:14 +0000
                Re: Command line arguments Phil Carmody <thefatphil_demunged@yahoo.co.uk> - 2013-01-13 20:19 +0200
                Re: Command line arguments JohnF <john@please.see.sig.for.email.com> - 2013-01-14 04:56 +0000
                Re: Command line arguments Ken Brody <kenbrody@spamcop.net> - 2013-01-22 15:32 -0500
              Re: Command line arguments Ken Brody <kenbrody@spamcop.net> - 2013-01-22 15:25 -0500
          Re: Command line arguments Fred K <fred.l.kleinschmidt@gmail.com> - 2013-01-10 14:49 -0800
          Re: Command line arguments glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2013-01-11 00:11 +0000
          Re: Command line arguments James Kuyper <jameskuyper@verizon.net> - 2013-01-10 21:16 -0500
          Re: Command line arguments Les Cargill <lcargill99@comcast.com> - 2013-01-11 21:25 -0600
      Re: Command line arguments James Kuyper <jameskuyper@verizon.net> - 2013-01-10 21:05 -0500
        Re: Command line arguments Shao Miller <sha0.miller@gmail.com> - 2013-01-10 21:15 -0500
          Re: Command line arguments 88888 Dihedral <dihedral88888@googlemail.com> - 2013-01-11 01:36 -0800
            Re: Command line arguments glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2013-01-11 19:33 +0000
              Re: Command line arguments Shao Miller <sha0.miller@gmail.com> - 2013-01-11 14:57 -0500
              Re: Command line arguments Robert Wessel <robertwessel2@yahoo.com> - 2013-01-11 14:26 -0600
                Re: Command line arguments glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2013-01-11 20:49 +0000
                Re: Command line arguments Robert Wessel <robertwessel2@yahoo.com> - 2013-01-11 18:15 -0600
                Re: Command line arguments Ben Bacarisse <ben.usenet@bsb.me.uk> - 2013-01-12 01:11 +0000
                Re: Command line arguments glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2013-01-12 01:38 +0000
                Re: Command line arguments Tim Rentsch <txr@alumni.caltech.edu> - 2013-01-12 14:57 -0800
                Re: Command line arguments Shao Miller <sha0.miller@gmail.com> - 2013-01-12 18:08 -0500
                Re: Command line arguments Ben Bacarisse <ben.usenet@bsb.me.uk> - 2013-01-13 00:42 +0000
                Re: Command line arguments Tim Rentsch <txr@alumni.caltech.edu> - 2013-01-13 12:31 -0800
                Re: Command line arguments Robert Wessel <robertwessel2@yahoo.com> - 2013-01-13 04:54 -0600
                Re: Command line arguments glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2013-01-13 12:37 +0000
                Re: Command line arguments Shao Miller <sha0.miller@gmail.com> - 2013-01-11 15:54 -0500
                Re: Command line arguments glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2013-01-11 21:16 +0000
                Re: Command line arguments Greg Martin <greg@softsprocket.com> - 2013-01-11 13:17 -0800
                Re: Command line arguments glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2013-01-11 22:48 +0000
              Re: Command line arguments gazelle@shell.xmission.com (Kenny McCormack) - 2013-01-11 22:53 +0000
              Re: Command line arguments "BartC" <bc@freeuk.com> - 2013-01-11 23:46 +0000
                Re: Command line arguments Robert Wessel <robertwessel2@yahoo.com> - 2013-01-11 18:12 -0600
                Re: Command line arguments Lew Pitcher <lpitcher@teksavvy.com> - 2013-01-11 19:59 -0500
                Re: Command line arguments Ben Bacarisse <ben.usenet@bsb.me.uk> - 2013-01-12 01:32 +0000
                Re: Command line arguments "BartC" <bc@freeuk.com> - 2013-01-12 02:47 +0000
                Re: Command line arguments Ben Bacarisse <ben.usenet@bsb.me.uk> - 2013-01-12 03:23 +0000
                Re: Command line arguments Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2013-01-11 22:28 -0700
                Re: Command line arguments Keith Thompson <kst-u@mib.org> - 2013-01-11 18:54 -0800
                Re: Command line arguments glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2013-01-12 03:42 +0000
                Re: Command line arguments James Kuyper <jameskuyper@verizon.net> - 2013-01-11 23:18 -0500
                Re: Command line arguments "BartC" <bc@freeuk.com> - 2013-01-12 12:06 +0000
                Re: Command line arguments James Kuyper <jameskuyper@verizon.net> - 2013-01-12 11:43 -0500
                Re: Command line arguments Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2013-01-12 10:27 -0700
                Re: Command line arguments Keith Thompson <kst-u@mib.org> - 2013-01-12 10:22 -0800
                Re: Command line arguments "BartC" <bc@freeuk.com> - 2013-01-12 20:26 +0000
                Re: Command line arguments glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2013-01-12 20:53 +0000
                Re: Command line arguments Geoff <geoff@invalid.invalid> - 2013-01-12 16:58 -0800
                Re: Command line arguments glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2013-01-13 01:51 +0000
                Re: Command line arguments Geoff <geoff@invalid.invalid> - 2013-01-13 00:27 -0800
                Re: Command line arguments Sjouke Burry <s@b> - 2013-01-14 06:00 +0000
                Re: Command line arguments glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2013-01-14 21:44 +0000
                Re: Command line arguments Shao Miller <sha0.miller@gmail.com> - 2013-01-12 16:10 -0500
                Re: Command line arguments "BartC" <bc@freeuk.com> - 2013-01-12 21:25 +0000
                Re: Command line arguments pacman@kosh.dhis.org (Alan Curry) - 2013-01-12 22:10 +0000
                Re: (OT keyboard input) "BartC" <bc@freeuk.com> - 2013-01-13 01:30 +0000
                Re: (OT keyboard input) Keith Thompson <kst-u@mib.org> - 2013-01-12 20:47 -0800
                Re: (OT keyboard input) pacman@kosh.dhis.org (Alan Curry) - 2013-01-13 08:46 +0000
                Re: (OT keyboard input) Robert Wessel <robertwessel2@yahoo.com> - 2013-01-13 03:56 -0600
                Re: (OT keyboard input) "BartC" <bc@freeuk.com> - 2013-01-13 12:10 +0000
                Re: (OT keyboard input) Lew Pitcher <lpitcher@teksavvy.com> - 2013-01-13 11:21 -0500
                Re: (OT keyboard input) 88888 Dihedral <dihedral88888@googlemail.com> - 2013-01-13 09:43 -0800
                Re: (OT keyboard input) "osmium" <r124c4u102@comcast.net> - 2013-01-13 12:09 -0600
                Re: (OT keyboard input) pacman@kosh.dhis.org (Alan Curry) - 2013-01-13 20:34 +0000
                Re: (OT keyboard input) "BartC" <bc@freeuk.com> - 2013-01-13 21:58 +0000
                Re: (OT keyboard input) Dr Nick <nospam-4@temporary-address.org.uk> - 2013-01-13 22:26 +0000
                Re: (OT keyboard input) Greg Martin <greg@softsprocket.com> - 2013-01-13 14:51 -0800
                Re: (OT keyboard input) Ben Bacarisse <ben.usenet@bsb.me.uk> - 2013-01-13 23:47 +0000
                Re: (OT keyboard input) pacman@kosh.dhis.org (Alan Curry) - 2013-01-14 01:34 +0000
                Re: (OT keyboard input) James Kuyper <jameskuyper@verizon.net> - 2013-01-13 23:53 -0500
                Re: (OT keyboard input) Robert Wessel <robertwessel2@yahoo.com> - 2013-01-14 00:26 -0600
                Re: (OT keyboard input) James Kuyper <jameskuyper@verizon.net> - 2013-01-14 07:36 -0500
                Re: (OT keyboard input) Robert Wessel <robertwessel2@yahoo.com> - 2013-01-14 13:40 -0600
                Re: (OT keyboard input) "BartC" <bc@freeuk.com> - 2013-01-14 14:23 +0000
                Re: (OT keyboard input) "BartC" <bc@freeuk.com> - 2013-01-14 13:36 +0000
                Re: (OT keyboard input) James Kuyper <jameskuyper@verizon.net> - 2013-01-14 09:25 -0500
                Re: (OT keyboard input) Ben Bacarisse <ben.usenet@bsb.me.uk> - 2013-01-14 21:09 +0000
                Re: (OT keyboard input) "BartC" <bc@freeuk.com> - 2013-01-14 22:06 +0000
                Re: (OT keyboard input) Nobody <nobody@nowhere.com> - 2013-01-15 08:16 +0000
                Re: (OT keyboard input) "BartC" <bc@freeuk.com> - 2013-01-15 11:50 +0000
                Re: (OT keyboard input) Keith Thompson <kst-u@mib.org> - 2013-01-15 07:53 -0800
                Re: (OT keyboard input) Nobody <nobody@nowhere.com> - 2013-01-15 20:26 +0000
                Re: (OT keyboard input) Ben Bacarisse <ben.usenet@bsb.me.uk> - 2013-01-15 21:08 +0000
                Re: (OT keyboard input) "BartC" <bc@freeuk.com> - 2013-01-15 22:19 +0000
                Re: (OT keyboard input) James Kuyper <jameskuyper@verizon.net> - 2013-01-15 20:37 -0500
                Re: (OT keyboard input) Robert Wessel <robertwessel2@yahoo.com> - 2013-01-16 02:24 -0600
                Re: (OT keyboard input) Ben Bacarisse <ben.usenet@bsb.me.uk> - 2013-01-16 04:28 +0000
                Re: (OT keyboard input) James Kuyper <jameskuyper@verizon.net> - 2013-01-16 06:44 -0500
                Re: (OT keyboard input) "BartC" <bc@freeuk.com> - 2013-01-16 13:57 +0000
                Re: (OT keyboard input) "BartC" <bc@freeuk.com> - 2013-01-16 14:32 +0000
                Re: (OT keyboard input) Ben Bacarisse <ben.usenet@bsb.me.uk> - 2013-01-17 00:35 +0000
                Re: (OT keyboard input) pacman@kosh.dhis.org (Alan Curry) - 2013-01-15 23:51 +0000
                Re: (OT keyboard input) pacman@kosh.dhis.org (Alan Curry) - 2013-01-14 21:15 +0000
                Re: (OT keyboard input) "BartC" <bc@freeuk.com> - 2013-01-14 21:59 +0000
                Re: (OT keyboard input) Greg Martin <greg@softsprocket.com> - 2013-01-13 10:04 -0800
                Re: (OT keyboard input) Roberto Waltman <usenet@rwaltman.com> - 2013-01-13 20:09 -0500
      Re: Command line arguments Geoff <geoff@invalid.invalid> - 2013-01-10 23:47 -0800
    Re: Command line arguments Phil Carmody <thefatphil_demunged@yahoo.co.uk> - 2013-01-13 20:03 +0200
  Re: Command line arguments glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2013-01-10 22:30 +0000
  Re: Command line arguments Shao Miller <sha0.miller@gmail.com> - 2013-01-10 18:12 -0500
    Re: Command line arguments Shao Miller <sha0.miller@gmail.com> - 2013-01-10 18:15 -0500
    Re: Command line arguments glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2013-01-11 00:16 +0000
  Re: Command line arguments Keith Thompson <kst-u@mib.org> - 2013-01-10 15:46 -0800
  Re: Command line arguments Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2013-01-10 17:58 -0700
  Re: Command line arguments Johann Klammer <klammerj@NOSPAM.a1.net> - 2013-01-11 09:26 +0100
  Re: Command line arguments Les Cargill <lcargill99@comcast.com> - 2013-01-11 21:23 -0600
    Re: Command line arguments glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2013-01-12 03:45 +0000
    Re: Command line arguments Philip Lantz <prl@canterey.us> - 2013-01-11 20:52 -0800
      Re: Command line arguments Les Cargill <lcargill99@comcast.com> - 2013-01-11 23:21 -0600
    Re: Command line arguments Keith Thompson <kst-u@mib.org> - 2013-01-12 09:52 -0800
  Re: Command line arguments James Dow Allen <jdallen2000@yahoo.com> - 2013-01-13 01:22 -0800
    Re: Command line arguments Shao Miller <sha0.miller@gmail.com> - 2013-01-13 11:11 -0500
      Re: Command line arguments Azazel <azazel@remove.azazel.net> - 2013-01-14 09:26 -0600
        Re: Command line arguments Shao Miller <sha0.miller@gmail.com> - 2013-01-14 17:08 -0500
          Re: Command line arguments glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2013-01-14 23:13 +0000
        Re: Command line arguments 88888 Dihedral <dihedral88888@googlemail.com> - 2013-01-14 22:11 -0800

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