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NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | STANDARDS | HISTORY | NOTES | SEE ALSO | COLOPHON |
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sgetmask(2) System Calls Manual sgetmask(2)
sgetmask, ssetmask - manipulation of signal mask (obsolete)
Standard C library (libc, -lc)
#include <sys/syscall.h> /* Definition of SYS_* constants */
#include <unistd.h>
[[deprecated]] long syscall(SYS_sgetmask, void);
[[deprecated]] long syscall(SYS_ssetmask, long newmask);
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.
sgetmask() always successfully returns the signal mask.
ssetmask() always succeeds, and returns the previous signal mask.
These system calls always succeed.
Linux.
Since Linux 3.16, support for these system calls is optional,
depending on whether the kernel was built with the
CONFIG_SGETMASK_SYSCALL option.
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.
sigprocmask(2), signal(7)
This page is part of the man-pages (Linux kernel and C library
user-space interface documentation) project. Information about
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for this manual page, see
⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
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⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
2024-06-26. If you discover any rendering problems in this HTML
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Linux man-pages 6.9.1 2024-05-02 sgetmask(2)
Pages that refer to this page: syscalls(2), signal(7)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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