манипуляции с маской сигнала (устарело) (manipulation of signal mask (obsolete))
Имя (Name)
sgetmask, ssetmask - manipulation of signal mask (obsolete)
Синопсис (Synopsis)
#include <sys/syscall.h> /* Definition of SYS_* constants */
#include <unistd.h>
long syscall(SYS_sgetmask, void);
long syscall(SYS_ssetmask, long newmask);
Note: glibc provides no wrappers for these functions,
necessitating the use of syscall(2).
Описание (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.
Возвращаемое значение (Return value)
sgetmask() always successfully returns the signal mask.
ssetmask() always succeeds, and returns the previous signal mask.
Ошибки (Error)
These system calls always succeed.
Версии (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.
Стандарты (Conforming to)
These system calls are Linux-specific.
Примечание (Note)
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.
Смотри также (See also)
sigprocmask(2), signal(7)
