Manpage of SGETMASK
SGETMASKSection: Linux Programmer's Manual (2)
NAMEsgetmask, ssetmask - manipulation of signal mask (obsolete)
long ssetmask(long newmask);
DESCRIPTIONThese 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. Thesignal mask is returned.
RETURN VALUEsgetmask() always successfully returns the signal mask. ssetmask() always succeeds, and returns the signal mask.
ERRORSThese system calls always succeed.
VERSIONSSince Linux 3.16, support for these system calls is optional, depending on whether the kernel was built with the CONFIG_SGETMASK_SYSCALLoption.
CONFORMING TOThese system calls are Linux-specific.
NOTESGlibc 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.
SEE ALSOsigprocmask(2), signal(7)
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