Name
sgetmask, ssetmask — manipulation of signal mask (obsolete)
Synopsis
long
sgetmask( |
void); |
long
ssetmask( |
long newmask); |
![[Note]](../stylesheet/note.png) |
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.
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.
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.
COLOPHON
This page is part of release 4.07 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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