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[15/39] keyctl.2: Use syscall(SYS_...); for system calls without a glibc wrapper

Message ID 20210510175546.28445-16-alx.manpages@gmail.com
State New
Headers show
Series man2: SYNOPSIS: Fix headers, use syscall(), and other fixes | expand

Commit Message

Alejandro Colomar May 10, 2021, 5:55 p.m. UTC 
Remove the libkeyutils prototype from the synopsis, which isn't
documented in the rest of the page, and as NOTES says, it's
probably better to use the various library functions.

Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
---
 man2/keyctl.2 | 17 +++++++----------
 1 file changed, 7 insertions(+), 10 deletions(-)
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Patch

diff --git a/man2/keyctl.2 b/man2/keyctl.2
index 690781eea..7f5fcb951 100644
--- a/man2/keyctl.2
+++ b/man2/keyctl.2
@@ -30,22 +30,20 @@ 
 keyctl \- manipulate the kernel's key management facility
 .SH SYNOPSIS
 .nf
-.B #include <keyutils.h>
-.PP
-.BI "long keyctl(int " operation ", ...);"
-.PP
-.B "/* For direct call via syscall(2): */"
-.B #include <asm/unistd.h>
-.B #include <linux/keyctl.h>
+.BR "#include <linux/keyctl.h>" "     /* Definition of " KEY* " constants */"
+.BR "#include <sys/syscall.h>" "      /* Definition of " SYS_* " constants */"
 .B #include <unistd.h>
 .PP
-.BI "long syscall(__NR_keyctl, int " operation ", unsigned long " arg2 ,
+.BI "long syscall(SYS_keyctl, int " operation ", unsigned long " arg2 ,
 .BI "             unsigned long " arg3 ", unsigned long " arg4 ,
 .BI "             unsigned long " arg5 );
 .fi
 .PP
 .IR Note :
-There is no glibc wrapper for this system call; see NOTES.
+glibc provides no wrapper for
+.BR keyctl (),
+necessitating the use of
+.BR syscall (2).
 .SH DESCRIPTION
 .BR keyctl ()
 allows user-space programs to perform key manipulation.
@@ -1954,7 +1952,6 @@  This system call first appeared in Linux 2.6.10.
 .SH CONFORMING TO
 This system call is a nonstandard Linux extension.
 .SH NOTES
-Glibc does not provide a wrapper for this system call.
 A wrapper is provided in the
 .IR libkeyutils
 library.