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-.\" Copyright (c) 2007 by Michael Kerrisk <mtk.manpages@gmail.com>
-.\"
-.\" SPDX-License-Identifier: Linux-man-pages-copyleft
-.\"
-.TH sgetmask 2 2023-10-31 "Linux man-pages 6.7"
-.SH NAME
-sgetmask, ssetmask \- manipulation of signal mask (obsolete)
-.SH LIBRARY
-Standard C library
-.RI ( libc ", " \-lc )
-.SH SYNOPSIS
-.nf
-.BR "#include <sys/syscall.h>" " /* Definition of " SYS_* " constants */"
-.B #include <unistd.h>
-.P
-.B [[deprecated]] long syscall(SYS_sgetmask, void);
-.BI "[[deprecated]] long syscall(SYS_ssetmask, long " newmask );
-.fi
-.SH DESCRIPTION
-These system calls are obsolete.
-.IR "Do not use them" ;
-use
-.BR sigprocmask (2)
-instead.
-.P
-.BR sgetmask ()
-returns the signal mask of the calling process.
-.P
-.BR ssetmask ()
-sets the signal mask of the calling process to the value given in
-.IR newmask .
-The previous signal mask is returned.
-.P
-The signal masks dealt with by these two system calls
-are plain bit masks (unlike the
-.I sigset_t
-used by
-.BR sigprocmask (2));
-use
-.BR sigmask (3)
-to create and inspect these masks.
-.SH RETURN VALUE
-.BR sgetmask ()
-always successfully returns the signal mask.
-.BR ssetmask ()
-always succeeds, and returns the previous signal mask.
-.SH ERRORS
-These system calls always succeed.
-.SH STANDARDS
-Linux.
-.SH HISTORY
-Since Linux 3.16,
-.\" f6187769dae48234f3877df3c4d99294cc2254fa
-support for these system calls is optional,
-depending on whether the kernel was built with the
-.B CONFIG_SGETMASK_SYSCALL
-option.
-.SH NOTES
-These system calls are unaware of signal numbers greater than 31
-(i.e., real-time signals).
-.P
-These system calls do not exist on x86-64.
-.P
-It is not possible to block
-.B SIGSTOP
-or
-.BR SIGKILL .
-.SH SEE ALSO
-.BR sigprocmask (2),
-.BR signal (7)