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sgetmask.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 2021-05-24 20:19:44 +02:00 committed by Michael Kerrisk
parent 18e21e1e4c
commit 1cd36d9dea
1 changed files with 8 additions and 7 deletions
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15
man2/sgetmask.2
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@ -27,12 +27,17 @@
sgetmask, ssetmask \- manipulation of signal mask (obsolete)
.SH SYNOPSIS
.nf
.B "long sgetmask(void);"
.BI "long ssetmask(long " newmask );
.BR "#include <sys/syscall.h>" " /* Definition of " SYS_* " constants */"
.B #include <unistd.h>
.PP
.B "long syscall(SYS_sgetmask, void);"
.BI "long syscall(SYS_ssetmask, long " newmask );
.fi
.PP
.IR Note :
There are no glibc wrappers for these system calls; see NOTES.
glibc provides no wrappers for these functions,
necessitating the use of
.BR syscall (2).
.SH DESCRIPTION
These system calls are obsolete.
.IR "Do not use them" ;
@ -73,10 +78,6 @@ option.
.SH CONFORMING TO
These system calls are Linux-specific.
.SH NOTES
Glibc does not provide wrappers for these obsolete system calls;
in the unlikely event that you want to call them, use
.BR syscall (2).
.PP
These system calls are unaware of signal numbers greater than 31
(i.e., real-time signals).
.PP