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From: "Dmitry V. Levin" <ldv@altlinux.org>
To: ALT Linux Sisyphus discussion list <sisyphus@lists.altlinux.org>
Subject: Re: [sisyphus] coreutils, who )
Date: Tue, 16 May 2006 18:35:56 +0400
Message-ID: <20060516143556.GC6226@basalt.office.altlinux.org> (raw)
In-Reply-To: <44697968.50607@yandex.ru>

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On Tue, May 16, 2006 at 10:04:08AM +0300, Artem wrote:
> Michael A. Kangin wrote:
> > On 16 мая 2006 01:37 Artem <x-console@yandex.ru> wrote:
> > 
> >>Да, я уже нашел _одну_ строчку  в coreutils-xxx/libs/readutmp.c из-за
> >>которой эта вещь происходит. 
> > 
> Эта информация скорее уже к coreutils@ . Описанное поведение who (см.
> тред) аналогично проявляется и в users.
> Предпосылки:
> в coreutils-5.94/lib/readutmp.c , line 107, добавили вызов ф-ции:
> <skip>
> if (desirable_utmp_entry (u, options))
> <skip>
> для отбора записей utmp по определенным критериям
> 
> Причина:
> в coreutils-5.94/lib/users.c , line 138,
> <skip>
>    switch (argc - optind)
>     {
>     case 0:                     /* users */
>       users (UTMP_FILE, READ_UTMP_CHECK_PIDS);
>                         ^^^^^^^^^^^^^^^^^^^^^
>                         вызов users без параметров,
>                         параметр READ_UTMP.... == 1
>       break;
> 
>     case 1:                     /* users <utmp file> */
>       users (argv[optind], 0);
>       ^^^^^^^^^^^^^^^^^^^^^^^
>       а вот здесь при users <utmp file>
>       подставляется "0" и выводится все записи.
> 
>       break;
> <skip>
> 
> Аналогично в coreutils-5.94/src/who.c, line 815
> <skip>
>     case 0:                     /* who */
>       who (UTMP_FILE, READ_UTMP_CHECK_PIDS);
>       break;
> 
>     case 1:                     /* who <utmp file> */
>       who (argv[optind], 0);
>       break;
> 
> <skip>
> 
> Спрашивается:
> а) зачем добавлено такое поведение?
> б) почему не сказано ничего в man ?
> в) это бага? Или фича?

2005-03-30  Paul Eggert  <eggert@cs.ucla.edu>

        * src/pinky.c (short_pinky): Adjust to read_utmp signature change.
        * src/uptime.c (uptime): New arg OPTIONS.  All uses changed.
        * src/users.c (users): Likewise.
        * src/who.c (who): Likewise.
        * src/uptime.c (main): Check PIDs when invoked with zero arguments.
        * src/users.c (main): Likewise.
        * src/who.c (main): Likewise.  Also with two arguments.
        Omit duplicate code in 2-arg case.
        (UT_PID): Moved to ../lib/readutmp.h.


-- 
ldv

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  parent reply	other threads:[~2006-05-16 14:35 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-05-09 21:40 [sisyphus] ничего не понимаю... ( powersave ) Artem
2006-05-10 10:07 ` Anton Farygin
2006-05-10 16:21     ` Anton Farygin
2006-05-10 16:47       ` Artem
2006-05-11  6:03         ` Anton Farygin
2006-05-11 10:41           ` Artem
2006-05-11 12:27             ` Anton Farygin
2006-05-15 14:12           ` Artem
2006-05-15 15:44             ` Anton Farygin
2006-05-15 18:05               ` Artem
2006-05-15 18:28                 ` Anton Farygin
2006-05-15 20:27                 ` Michael A. Kangin
2006-05-15 21:37                   ` [sisyphus] coreutils, who ) Artem
2006-05-16  2:24                     ` Michael A. Kangin
2006-05-16  7:04                       ` Artem
2006-05-16  8:13                         ` Anton Farygin
2006-05-16 13:39                           ` Dmitry V. Levin
2006-05-16 14:01                             ` Anton Farygin
2006-05-16 14:28                               ` Dmitry V. Levin
2006-05-16 17:19                                 ` Anton Farygin
2006-05-21  8:33                               ` [sisyphus] /usr/lib/powersave/wttyhx -> /usr/bin/wttyhx? Michael Shigorin
2006-05-22  5:02                                 ` Anton Farygin
2006-05-16 14:35                         ` Dmitry V. Levin [this message]
2006-05-16 20:39                           ` [sisyphus] coreutils, who ) Artem
2006-05-16 21:06                             ` Dmitry V. Levin
2006-05-16 21:31                               ` Artem
2006-05-16 21:36                                 ` Artem
2006-05-16 22:12                                   ` Michael A. Kangin
2006-05-16 22:16                                     ` Dmitry V. Levin
2006-05-16 23:46                                       ` Ivan Adzhubey
2006-05-16 23:59                                         ` Dmitry V. Levin
2006-05-17 22:25                                           ` Ivan Adzhubey
2006-05-17 22:53                                             ` Dmitry V. Levin
2006-05-17 23:13                                               ` Artem
2006-05-17  5:51                                       ` Anton Farygin
2006-05-16 22:14                                   ` Dmitry V. Levin
2006-05-16 22:23                                     ` Artem
2006-05-16 23:05                                       ` Dmitry V. Levin
2006-05-17  6:15                                         ` Artem
2006-05-17 23:12                                           ` Artem
2006-05-17 23:26                                             ` Dmitry V. Levin
2006-05-18  5:26                                               ` Artem
2006-05-21  8:32                       ` [sisyphus] [JT] " Michael Shigorin

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