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From: Takashi Iwai <tiwai@suse.de>
To: Jaroslav Kysela <perex@suse.cz>
Cc: Sebastian Kapfer <sebastian_kapfer@web.de>,
	"alsa-devel@lists.sourceforge.net"
	<alsa-devel@lists.sourceforge.net>
Subject: Re: [BUG] alsa-lib leaves sound device open for child processes
Date: Wed, 05 Feb 2003 13:42:31 +0100	[thread overview]
Message-ID: <s5hwukegaq0.wl@alsa2.suse.de> (raw)
In-Reply-To: <Pine.LNX.4.44.0302051218100.1303-100000@pnote.perex-int.cz>

At Wed, 5 Feb 2003 12:20:23 +0100 (CET),
Jaroslav wrote:
> 
> Well, I and Abramo think that it's better to force application developers 
> to clean allocated things before they'll call exec().

the problem is not only the explicit exec() call.
without this bit, you'll pass the fds to other processes even by
popen() or system() or whatever.  that is, if your application calls
an external program in the middle, it can block the operation.

i don't see any critical drawback of setting FD_CLOEXEC as default.
the application which needs to pass the alsa-lib's fds _explicitly_
can reset the bit via fcntl() again before calling exec().


Takashi


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  reply	other threads:[~2003-02-05 12:42 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-02-03 22:16 [BUG] alsa-lib leaves sound device open for child processes Sebastian Kapfer
2003-02-05 11:20 ` Jaroslav Kysela
2003-02-05 12:42   ` Takashi Iwai [this message]
2003-02-05 13:05     ` Jaroslav Kysela
2003-02-05 13:55       ` Takashi Iwai
2003-02-05 14:03         ` Chris Rankin
2003-02-05 14:16           ` Paul Davis
  -- strict thread matches above, loose matches on Subject: below --
2003-02-05 18:50 Chris Rankin
     [not found] <20030205205905.7800db0c.sebastian_kapfer@web.de>
2003-02-05 22:39 ` Chris Rankin
2003-02-06 14:40   ` Sebastian Kapfer
2003-02-06 23:10     ` Chris Rankin
2003-02-07 13:03       ` Paul Davis
2003-02-07 13:58         ` Chris Rankin
2003-02-07 15:22           ` Paul Davis
2003-02-07 16:13           ` Takashi Iwai
2003-02-07 19:54             ` Chris Rankin
2003-02-07 14:37       ` Sebastian Kapfer
2003-02-07 19:46         ` Chris Rankin
2003-02-08 11:50           ` Jaroslav Kysela
2003-02-08 13:55             ` Sebastian Kapfer
2003-02-08 19:45             ` Sebastian Kapfer
2003-02-08 19:53               ` Jaroslav Kysela
2003-02-12 11:54                 ` Takashi Iwai
2003-02-12 12:46                   ` Jaroslav Kysela
2003-02-07 19:35 Chris Rankin

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