sgetmask(2) — Linux manual page

sgetmask(2)                System Calls Manual               sgetmask(2)

NAME

       sgetmask, ssetmask - manipulation of signal mask (obsolete)

LIBRARY

       Standard C library (libc, -lc)

SYNOPSIS

       #include <sys/syscall.h>      /* Definition of SYS_* constants */
       #include <unistd.h>

       [[deprecated]] long syscall(SYS_sgetmask, void);
       [[deprecated]] long syscall(SYS_ssetmask, long newmask);

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.

STANDARDS

       Linux.

HISTORY

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

NOTES

       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 the man-pages (Linux kernel and C library
       user-space interface documentation) project.  Information about
       the project can be found at 
       ⟨https://www.kernel.org/doc/man-pages/⟩.  If you have a bug report
       for this manual page, see
       ⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
       This page was obtained from the tarball man-pages-6.9.1.tar.gz
       fetched from
       ⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
       2024-06-26.  If you discover any rendering problems in this HTML
       version of the page, or you believe there is a better or more up-
       to-date source for the page, or you have corrections or
       improvements to the information in this COLOPHON (which is not
       part of the original manual page), send a mail to
       man-pages@man7.org

Linux man-pages 6.9.1          2024-05-02                    sgetmask(2)

Pages that refer to this page: syscalls(2), signal(7)

---