how to discard instruction from previous signal

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LEARN ABOUT LINUX

sgetmask

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

NAME

       sgetmask, ssetmask - manipulation of signal mask (obsolete)

SYNOPSIS

       long sgetmask(void);

       long 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.

CONFORMING TO

       These system calls are Linux-specific.

NOTES

       Glibc does not provide wrappers for these system calls; use syscall(2).

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

       It is not possible to block SIGSTOP or SIGKILL.

SEE ALSO

       sigprocmask(2), signal(7)

COLOPHON

       This page is part of release 3.27 of the Linux man-pages project.  A description of the project, and information about reporting bugs,  can
       be found at http://www.kernel.org/doc/man-pages/.

Linux								    2007-07-05							       SGETMASK(2)

Programming