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capget.2: Use syscall(SYS_...); for system calls without a wrapper 

Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Alejandro Colomar 2021-04-04 13:58:23 +02:00 committed by Michael Kerrisk
parent 149eb741d7
commit 00e4779ad7
1 changed files with 10 additions and 10 deletions
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20
man2/capget.2
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@ -18,14 +18,17 @@
capget, capset \- set/get capabilities of thread(s)
.SH SYNOPSIS
.nf
.B #include <sys/capability.h>
.RB " /* Definition of " CAP_* " and " \
_LINUX_CAPABILITY_* " constants */"
.B #include <linux/capability.h>
.BR "#include <sys/syscall.h>" " /* Definition of " SYS_* " constants */"
.B #include <unistd.h>
.PP
.BI "int capget(cap_user_header_t " hdrp ", cap_user_data_t " datap );
.BI "int capset(cap_user_header_t " hdrp ", const cap_user_data_t " datap );
.BI "int syscall(SYS_capget, cap_user_header_t " hdrp ,
.BI " cap_user_data_t " datap );
.BI "int syscall(SYS_capset, cap_user_header_t " hdrp ,
.BI " const cap_user_data_t " datap );
.fi
.PP
.IR Note :
There are no glibc wrappers for these system calls; see NOTES.
.SH DESCRIPTION
These two system calls are the raw kernel interface for getting and
setting thread capabilities.
@ -40,7 +43,7 @@ The portable interfaces are
.BR cap_set_proc (3)
and
.BR cap_get_proc (3);
if possible, you should use those interfaces in applications.
if possible, you should use those interfaces in applications; see NOTES.
.\"
.SS Current details
Now that you have been warned, some current kernel details.
@ -239,9 +242,6 @@ No such thread.
.SH CONFORMING TO
These system calls are Linux-specific.
.SH NOTES
Glibc does not provide a wrapper for this system call; call it using
.BR syscall (2).
.PP
The portable interface to the capability querying and setting
functions is provided by the
.I libcap