SGETMASK(2)               (2020-08-13)                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).

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     SGETMASK(2)               (2020-08-13)                SGETMASK(2)

          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 5.10 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/.

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