Re: [PATCH] login.3: ATTRIBUTES: Note functions that aren't thread-safe

["Michael Kerrisk (man-pages)" <mtk.manpages-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

On 04/16/2015 07:09 AM, Zeng Linggang wrote:
> The markings match glibc markings.


Thanks, Zeng. Applied.

Cheers,

Michael


> login:  MT-Unsafe race:utent sig:ALRM timer
> logout: MT-Unsafe race:utent sig:ALRM timer
> 
> Signed-off-by: Zeng Linggang <zenglg.jy-BthXqXjhjHXQFUHtdCDX3A@public.gmane.org>
> ---
>  man3/login.3 | 35 +++++++++++++++++++++++++++++++++++
>  1 file changed, 35 insertions(+)
> 
> diff --git a/man3/login.3 b/man3/login.3
> index fe03b5a..98d3b91 100644
> --- a/man3/login.3
> +++ b/man3/login.3
> @@ -109,6 +109,41 @@ user accounting log file, configured through
>  .B _PATH_WTMP
>  in
>  .I <paths.h>
> +.SH ATTRIBUTES
> +For an explanation of the terms used in this section, see
> +.BR attributes (7).
> +.TS
> +allbox;
> +lb lb lbw20
> +l l l.
> +Interface	Attribute	Value
> +T{
> +.BR login (),
> +.br
> +.BR logout ()
> +T}	Thread safety	T{
> +MT-Unsafe race:utent
> +.br
> +sig:ALRM timer
> +T}
> +.TE
> +
> +In the above table,
> +.I utent
> +in
> +.I race:utent
> +signifies that if any of the functions
> +.BR setutent (3),
> +.BR getutent (3),
> +or
> +.BR endutent (3)
> +are used in parallel in different threads of a program,
> +then data races could occur.
> +.BR login (3)
> +and
> +.BR logout (3)
> +calls those functions,
> +so we use race:utent to remind users.
>  .SH CONFORMING TO
>  Not in POSIX.1-2001.
>  Present on the BSDs.
> 


-- 
Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
Linux/UNIX System Programming Training: http://man7.org/training/
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