Re: [PATCH 1/1] fork.2: child and parent run in separate memory spaces

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

On 02/16/2015 11:40 AM, Heinrich Schuchardt wrote:
> fork.2 should clearly point out that child and parent
> process run in separate memory spaces.

Thanks, Heinrich. Applied.

Cheers,

Michael


> Signed-off-by: Heinrich Schuchardt <xypron.glpk-Mmb7MZpHnFY@public.gmane.org>
> ---
>  man2/fork.2 | 22 +++++++++++++++++++---
>  1 file changed, 19 insertions(+), 3 deletions(-)
> 
> diff --git a/man2/fork.2 b/man2/fork.2
> index e6695ad..dce9bff 100644
> --- a/man2/fork.2
> +++ b/man2/fork.2
> @@ -46,9 +46,25 @@ fork \- create a child process
>  .SH DESCRIPTION
>  .BR fork ()
>  creates a new process by duplicating the calling process.
> -The new process, referred to as the \fIchild\fP,
> -is an exact duplicate of the calling process,
> -referred to as the \fIparent\fP, except for the following points:
> +The new process is referred to as the
> +.I child
> +process.
> +The calling process is referred to as the
> +.I parent
> +process.
> +
> +The child process and the parent process run in separate memory spaces.
> +At the time of
> +.BR fork ()
> +both memory spaces have the same content.
> +Memory writes, file mappings
> +.RB ( mmap (2)),
> +and unmappings
> +.RB ( munmap (2))
> +performed by one of the processes do not affect the other.
> +
> +The child process is an exact duplicate of the parent
> +process except for the following points:
>  .IP * 3
>  The child has its own unique process ID,
>  and this PID does not match the ID of any existing process group
> 


-- 
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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