Name

sgetmask, ssetmask — manipulation of signal mask (obsolete)

Synopsis

long sgetmask( void);  
 
long ssetmask( long newmask);
 
[Note] Note
There are no glibc wrappers for these system calls; see NOTES.

DESCRIPTION

These system calls are obsolete. Do not use them; use sigprocmask(2) instead.

sgetmask() returns the signal mask of the calling process.

ssetmask() sets the signal mask of the calling process to the value given in newmask. The previous signal mask is returned.

The signal masks dealt with by these two system calls are plain bit masks (unlike the sigset_t used by sigprocmask(2)); use sigmask(3) to create and inspect these masks.

RETURN VALUE

sgetmask() always successfully returns the signal mask. ssetmask() always succeeds, and returns the previous signal mask.

ERRORS

These system calls always succeed.

VERSIONS

Since Linux 3.16, support for these system calls is optional, depending on whether the kernel was built with the CONFIG_SGETMASK_SYSCALL option.

CONFORMING TO

These system calls are Linux-specific.

NOTES

Glibc does not provide wrappers for these obsolete system calls; in the unlikely event that you want to call them, use syscall(2).

These system calls are unaware of signal numbers greater than 31 (i.e., real-time signals).

These system calls do not exist on x86-64.

It is not possible to block SIGSTOP or SIGKILL.

SEE ALSO

sigprocmask(2), signal(7)

COLOPHON

This page is part of release 4.07 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man−pages/.


  t
Copyright (c) 2007 by Michael Kerrisk <mtk.manpagesgmail.com>

%%%LICENSE_START(VERBATIM)
Permission is granted to make and distribute verbatim copies of this
manual provided the copyright notice and this permission notice are
preserved on all copies.

Permission is granted to copy and distribute modified versions of this
manual under the conditions for verbatim copying, provided that the
entire resulting derived work is distributed under the terms of a
permission notice identical to this one.

Since the Linux kernel and libraries are constantly changing, this
manual page may be incorrect or out-of-date.  The author(s) assume no
responsibility for errors or omissions, or for damages resulting from
the use of the information contained herein.  The author(s) may not
have taken the same level of care in the production of this manual,
which is licensed free of charge, as they might when working
professionally.

Formatted or processed versions of this manual, if unaccompanied by
the source, must acknowledge the copyright and authors of this work.
%%%LICENSE_END