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* [devel] Q: squid - сил моих больше нет
@ 2004-12-22 14:13 Alexey I. Froloff
  2004-12-22 16:33 ` Alexey I. Froloff
  0 siblings, 1 reply; 8+ messages in thread
From: Alexey I. Froloff @ 2004-12-22 14:13 UTC (permalink / raw)
  To: ALT Devel discussion list

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Исходные данные: squid-2.5.STABLE7-alt{1,4}, ADS домен,
авторизация через самбовый ntlm_auth.  Надо внести сквида в
группу winbind и тогда наступит счастие...  А нифига.

# id squid
uid=23(squid) gid=23(squid) groups=23(squid),35(winbind)

Конфиг:

cache_effective_user squid
cache_effective_group squid

(cache_effective_group пробовал убирать - не помогает)

Смотрим ему в код (извините за размер):

src/main.c:475
static void
mainInitialize(void)
{
    /* chroot if configured to run inside chroot */
    if (Config.chroot_dir && chroot(Config.chroot_dir)) {
	fatal("failed to chroot");
    }
    if (opt_catch_signals) {
	squid_signal(SIGSEGV, death, SA_NODEFER | SA_RESETHAND);
	squid_signal(SIGBUS, death, SA_NODEFER | SA_RESETHAND);
    }
    squid_signal(SIGPIPE, SIG_IGN, SA_RESTART);
    squid_signal(SIGCHLD, sig_child, SA_NODEFER | SA_RESTART);

    setEffectiveUser();
    assert(Config.Sockaddr.http);
    if (httpPortNumOverride != 1)
	Config.Sockaddr.http->s.sin_port = htons(httpPortNumOverride);
    if (icpPortNumOverride != 1)
	Config.Port.icp = (u_short) icpPortNumOverride;

    _db_init(Config.Log.log, Config.debugOptions);
    fd_open(fileno(debug_log), FD_LOG, Config.Log.log);

src/main.c:437
static void
setEffectiveUser(void)
{
    leave_suid();               /* Run as non privilegied user */
#ifdef _SQUID_OS2_
    return;
#endif
    if (geteuid() == 0) {
        debug(0, 0) ("Squid is not safe to run as root!  If you must\n");
        debug(0, 0) ("start Squid as root, then you must configure\n");
        debug(0, 0) ("it to run as a non-priveledged user with the\n");
        debug(0, 0) ("'cache_effective_user' option in the config file.\n");
        fatal("Don't run Squid as root, set 'cache_effective_user'!");
    }
}       

src/tools.c:515
void
leave_suid(void)
{
    debug(21, 3) ("leave_suid: PID %d called\n", (int) getpid());
    if (Config.effectiveGroup) {
#if HAVE_SETGROUPS
        setgroups(1, &Config2.effectiveGroupID);
#endif
        if (setgid(Config2.effectiveGroupID) < 0)
            debug(50, 0) ("ALERT: setgid: %s\n", xstrerror());
    }
    if (geteuid() != 0) 
        return;
    /* Started as a root, check suid option */
    if (Config.effectiveUser == NULL)
        return;
    debug(21, 3) ("leave_suid: PID %d giving up root, becoming '%s'\n",
        (int) getpid(), Config.effectiveUser);
    if (!Config.effectiveGroup) {
        if (setgid(Config2.effectiveGroupID) < 0)
            debug(50, 0) ("ALERT: setgid: %s\n", xstrerror());
        if (initgroups(Config.effectiveUser, Config2.effectiveGroupID) < 0) {
            debug(50, 0) ("ALERT: initgroups: unable to set groups for User %s "
                "and Group %u", Config.effectiveUser,
                (unsigned) Config2.effectiveGroupID);
        }
    }       
#if HAVE_SETRESUID
    if (setresuid(Config2.effectiveUserID, Config2.effectiveUserID, 0) < 0)
        debug(50, 0) ("ALERT: setresuid: %s\n", xstrerror());
#elif HAVE_SETEUID
    if (seteuid(Config2.effectiveUserID) < 0)
        debug(50, 0) ("ALERT: seteuid: %s\n", xstrerror());
#else
    if (setuid(Config2.effectiveUserID) < 0)
        debug(50, 0) ("ALERT: setuid: %s\n", xstrerror());
#endif  
}   


Теперь смотрим в strace, сооветствующий этому коду:

32724 open("/proc/sys/kernel/ngroups_max", O_RDONLY) = -1 ENOENT (No such file or directory)
32724 setgroups32(1, [23])              = 0
32724 setgid32(23)                      = 0
32724 geteuid32()                       = 0
32724 setresuid32(23, 23, 0)            = 0
32724 geteuid32()                       = 23
32724 open("/var/log/squid/cache.log", O_RDWR|O_APPEND|O_CREAT, 0666) = 3

(В логах тишина, потому как он ещё не открыт к этому времени)

Первый geteuid32 из leave_suid(), второй из setEffectiveUser().
Config2.effectiveGroupID и Config2.effectiveUserID определены,
Config.effectiveUser тоже очевидно не NULL, потому как
setresuid() вызывается.  Где может быть проблема?  Я уже даже не
знаю куда ему смотреть...

-- 
Regards, Sir Raorn.
-------------------
>Где можно взять этот драйвер?  Я посмотрю, что там можно допилить для
>его сборки.
Перевожу:
"не фиг чайникам собирать модули ядра в пакеты".
		-- rider in devel@

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^ permalink raw reply	[flat|nested] 8+ messages in thread
end of thread, other threads:[~2004-12-23  8:31 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2004-12-22 14:13 [devel] Q: squid - сил моих больше нет Alexey I. Froloff
2004-12-22 16:33 ` Alexey I. Froloff
2004-12-22 17:15   ` Dimitry V. Ketov
2004-12-22 18:11     ` Alexey I. Froloff
2004-12-22 19:31       ` Dimitry V. Ketov
2004-12-23  6:42         ` Alexey I. Froloff
2004-12-23  6:55           ` Dimitry V. Ketov
2004-12-23  8:31       ` Denis Ovsienko

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