[debbugs-tracker] bug#19995: closed (doc: Adds a bug section to sync.1 page to draw attention to unexpected behavior allowed by POSIX.)

[GNU bug Tracking System]

Your message dated Thu, 05 Mar 2015 12:23:44 +0000
with message-id <address@hidden>
and subject line Re: bug#19995: [patch] sync.1: prevent data loss (reposte of 
my previous merged message)
has caused the debbugs.gnu.org bug report #19995,
regarding doc: Adds a bug section to sync.1 page to draw attention to 
unexpected behavior allowed by POSIX.
to be marked as done.

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19995: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=19995
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> --- Begin Message ---
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> Subject: 
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> doc: Adds a bug section to sync.1 page to draw attention to unexpected behavior allowed by POSIX.
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> Date: 
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> Wed,  4 Mar 2015 01:06:01 +0100
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> From: Stéphane Aulery <address@hidden>
>
> Almost identical copy of sync.2.
>
> Debian bug #507085 reported by address@hidden
>
> Signed-off-by: Stéphane Aulery <address@hidden>
> ---
>  man/sync.x | 5 +++++
>  1 file changed, 5 insertions(+)
>
> diff --git a/man/sync.x b/man/sync.x
> index 79fee22..5b85bba 100644
> --- a/man/sync.x
> +++ b/man/sync.x
> @@ -2,5 +2,10 @@
>  sync \- Synchronize cached writes to persistent storage
>  [DESCRIPTION]
>  .\" Add any additional description here
> +[BUGS]
> +According to the standard specification (e.g., POSIX.1-2001), sync()
> +syscall schedules the writes, but may return before the actual writing is
> +done. However, since version 1.3.20 Linux does actually wait. (This still
> +does not guarantee data integrity: modern disks have large caches.)
>  [SEE ALSO]
>  fdatasync(2), fsync(2), sync(2), syncfs(2)
> -- 
> 2.1.4
>
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> --- End Message ---
> --- Begin Message ---
>
>
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> Subject: 
>
> Re: bug#19995: [patch] sync.1: prevent data loss (reposte of my previous merged message)
>
>
>
>
> Date: 
>
> Thu, 05 Mar 2015 12:23:44 +0000
>
>
>
>
> User-agent: 
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> Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.4.0
>
>
>
>
> On 05/03/15 11:45, Stéphane Aulery wrote:
> > Hello,
> > 
> > A Debian user reported [1] that sync.1 man page is incomplete unlike sync.2
> > There is no mention of the unexpected behavior allowed by POSIX, which can
> > cause data loss.
> > 
> > This patch provides a possible correction.
> > 
> > [1] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=507085
>
> How about I apply this in your name instead?
>
> diff --git a/man/sync.x b/man/sync.x
> index 79fee22..18ee3fc 100644
> --- a/man/sync.x
> +++ b/man/sync.x
> @@ -2,5 +2,8 @@
>  sync \- Synchronize cached writes to persistent storage
>  [DESCRIPTION]
>  .\" Add any additional description here
> +[BUGS]
> +Persistence guarantees vary per system.
> +See the system calls below for more details.
>  [SEE ALSO]
>  fdatasync(2), fsync(2), sync(2), syncfs(2)
>
>
>
> --- End Message ---