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[30/39] pidfd_open.2: Use syscall(SYS_...); for system calls without a wrapper

Message ID 20210510175546.28445-31-alx.manpages@gmail.com
State New
Headers show
Series man2: SYNOPSIS: Fix headers, use syscall(), and other fixes | expand

Commit Message

Alejandro Colomar \(man-pages\) May 10, 2021, 5:55 p.m. UTC
Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
---
 man2/pidfd_open.2 | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)
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Patch

diff --git a/man2/pidfd_open.2 b/man2/pidfd_open.2
index d0bb1769b..cb91ce71f 100644
--- a/man2/pidfd_open.2
+++ b/man2/pidfd_open.2
@@ -27,11 +27,17 @@ 
 pidfd_open \- obtain a file descriptor that refers to a process
 .SH SYNOPSIS
 .nf
-.BI "int pidfd_open(pid_t " pid ", unsigned int " flags );
+.BR "#include <sys/syscall.h>" "      /* Definition of " SYS_* " constants */"
+.B #include <unistd.h>
+.PP
+.BI "int syscall(SYS_pidfd_open, pid_t " pid ", unsigned int " flags );
 .fi
 .PP
 .IR Note :
-There is no glibc wrapper for this system call; see NOTES.
+glibc provides no wrapper for
+.BR pidfd_open (),
+necessitating the use of
+.BR syscall (2).
 .SH DESCRIPTION
 The
 .BR pidfd_open ()
@@ -89,9 +95,6 @@  first appeared in Linux 5.3.
 .BR pidfd_open ()
 is Linux specific.
 .SH NOTES
-Glibc does not provide a wrapper for this system call; call it using
-.BR syscall (2).
-.PP
 The following code sequence can be used to obtain a file descriptor
 for the child of
 .BR fork (2):