Re: [PATCH] copy_file_range: update for glibc compatibility

Michael Kerrisk (man-pages)
2018-01-08T23:58:03Z

On 01/01/2018 05:12 AM, Shawn Landden wrote:
> Signed-off-by: Shawn Landden <slandden-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>

Thanks, Shawn. Applied.

Cheers,

Michael

> ---
> man2/copy_file_range.2 | 9 +++++----
> 1 file changed, 5 insertions(+), 4 deletions(-)
>
> diff --git a/man2/copy_file_range.2 b/man2/copy_file_range.2
> index 6e50ea6ec..3a3a6aa9f 100644
> --- a/man2/copy_file_range.2
> +++ b/man2/copy_file_range.2
> @@ -27,7 +27,7 @@
> copy_file_range \- Copy a range of data from one file to another
> .SH SYNOPSIS
> .nf
> -.B #include <sys/syscall.h>
> +.B #define _GNU_SOURCE
> .B #include <unistd.h>
> .PP
> .BI "ssize_t copy_file_range(int " fd_in ", loff_t *" off_in ,
> @@ -124,12 +124,13 @@ are not on the same mounted filesystem.
> .SH VERSIONS
> The
> .BR copy_file_range ()
> -system call first appeared in Linux 4.5.
> -Library support was added in glibc 2.27.
> +system call first appeared in Linux 4.5, but glibc 2.27 provides a user-space
> +emulation when it is not available.
> +.\" https://sourceware.org/git/?p=glibc.git;a=commit;f=posix/unistd.h;h=bad7a0c81f501fbbcc79af9eaa4b8254441c4a1f
> .SH CONFORMING TO
> The
> .BR copy_file_range ()
> -system call is a nonstandard Linux extension.
> +system call is a nonstandard Linux and GNU extension.
> .SH NOTES
> If
> .I file_in
>

--
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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