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From: Florian Weimer <fw-d32yF4oPJVt0XxTmqZlbVQ@public.gmane.org>
To: Daniel Colascione <dancol-CpwT7fMy01Ydnm+yROfE0A@public.gmane.org>
Cc: mtk.manpages-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org,
	linux-man-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [patch] document that O_TMPFILE works with shm_open
Date: Tue, 27 Oct 2015 23:12:18 +0100	[thread overview]
Message-ID: <87ziz4c665.fsf@mid.deneb.enyo.de> (raw)
In-Reply-To: <562B2CD9.80901-CpwT7fMy01Ydnm+yROfE0A@public.gmane.org> (Daniel Colascione's message of "Sat, 24 Oct 2015 00:01:45 -0700")

* Daniel Colascione:

> This test program works fine. (Watch it work in strace.) This patch is
> against git master. It's okay to document accidental features, right?
>
> int
> main()
> {
>     int shmfd = shm_open(".", O_TMPFILE | O_RDWR | O_EXCL, 0600);
>     ftruncate(shmfd, 1000);
>     mmap(NULL, 1000, PROT_READ | PROT_WRITE, MAP_SHARED, shmfd, 0);
>
>     return 0;
> }

This looks more like a bug to me.  I wouldn't count on it continuing
to work.  glibc already tightened the rules for the name once.

Florian
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  parent reply	other threads:[~2015-10-27 22:12 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-10-24  7:01 [patch] document that O_TMPFILE works with shm_open Daniel Colascione
     [not found] ` <562B2CD9.80901-CpwT7fMy01Ydnm+yROfE0A@public.gmane.org>
2015-10-27 22:12   ` Florian Weimer [this message]
     [not found]     ` <87ziz4c665.fsf-ZqZwdwZz9NfTBotR3TxKnbNAH6kLmebB@public.gmane.org>
2015-10-27 22:13       ` Daniel Colascione
     [not found]         ` <562FF70C.5030600-CpwT7fMy01Ydnm+yROfE0A@public.gmane.org>
2015-10-27 22:19           ` Florian Weimer
     [not found]             ` <87vb9sc5tx.fsf-ZqZwdwZz9NfTBotR3TxKnbNAH6kLmebB@public.gmane.org>
2015-10-27 22:25               ` Daniel Colascione
2015-12-04 19:40   ` Michael Kerrisk (man-pages)

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