# Re: \[PATCH v2\] man2: new page describing memfd\_secret() system call

- From: Alejandro Colomar (man-pages) \<hidden\>
- Date: 2021-07-29 10:12:18 
- List: linux-api
- Page: https://ratatoskr.run/linux-api/2021/07/6510151
- Thread: https://ratatoskr.run/linux-api/2021/07/6510150/t.md

```text
Hi Mike,

On 7/29/21 10:29 AM, Mike Rapoport wrote:
> From: Mike Rapoport <redacted>
>
> Signed-off-by: Mike Rapoport <redacted>
> ---
>
> v2: address Alex's comments:
> * update synopsis to match new style for syscalls without a wrapper
> * drop note about absence of glibc wrapper
> * update formatting

Please check a small typo introduced in v2 below.

Thanks!

Alex

>
> v1: https://lore.kernel.org/linux-api/20210727124140.1487079-1-rppt@kernel.org
>
>   man2/memfd_secret.2 | 147 ++++++++++++++++++++++++++++++++++++++++++++
>   1 file changed, 147 insertions(+)
>   create mode 100644 man2/memfd_secret.2
>
> diff --git a/man2/memfd_secret.2 b/man2/memfd_secret.2
> new file mode 100644
> index 000000000..5a70cb5d2
> --- /dev/null
> +++ b/man2/memfd_secret.2
> @@ -0,0 +1,147 @@
> +.\" Copyright (c) 2021, IBM Corporation.
> +.\" Written by Mike Rapoport [ref]
> +.\"
> +.\" Based on memfd_create(2) man page
> +.\" Copyright (C) 2014 Michael Kerrisk [ref]
> +.\" and Copyright (C) 2014 David Herrmann [ref]
> +.\"
> +.\" %%%LICENSE_START(GPLv2+)
> +.\"
> +.\" This program is free software; you can redistribute it and/or modify
> +.\" it under the terms of the GNU General Public License as published by
> +.\" the Free Software Foundation; either version 2 of the License, or
> +.\" (at your option) any later version.
> +.\"
> +.\" This program is distributed in the hope that it will be useful,
> +.\" but WITHOUT ANY WARRANTY; without even the implied warranty of
> +.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> +.\" GNU General Public License for more details.
> +.\"
> +.\" You should have received a copy of the GNU General Public
> +.\" License along with this manual; if not, see
> +.\" <http://www.gnu.org/licenses/>.
> +.\" %%%LICENSE_END
> +.\"
> +.TH MEMFD_SECRET 2 2020-08-02 Linux "Linux Programmer's Manual"
> +.SH NAME
> +memfd_secret \- create an anonymous file to access secret memory regions
> +.SH SYNOPSIS
> +.nf
> +.PP
> +.BR "#include <sys/syscall.h>" "      /* Definition of " SYS_* " constants */"
> +.B #include <unistd.h>
> +.PP
> +.BI "int syscall(SYS_memfd_secret, int " cmd ", unsigned int " flags \
> +", int " cpu_id );

Check the parameter list :)



-- 
Alejandro Colomar
Linux man-pages comaintainer; https://www.kernel.org/doc/man-pages/
http://www.alejandro-colomar.es/
```