minix man page for ssetmask

SGETMASK(2)						     Linux Programmer's Manual						       SGETMASK(2)

NAME
       sgetmask, ssetmask - manipulation of signal mask (obsolete)

SYNOPSIS
       long sgetmask(void);

       long ssetmask(long newmask);

       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 4.15 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/.

Linux								    2017-09-15							       SGETMASK(2)