атомарно выпускать заблокированные сигналы и ждать прерывания (atomically release blocked signals and wait for interrupt)
Имя (Name)
sigpause - atomically release blocked signals and wait for
interrupt
Синопсис (Synopsis)
#include <signal.h>
int sigpause(int sigmask); /* BSD (but see NOTES) */
int sigpause(int sig); /* System V / UNIX 95 */
Описание (Description)
Don't use this function. Use sigsuspend(2) instead.
The function sigpause() is designed to wait for some signal. It
changes the process's signal mask (set of blocked signals), and
then waits for a signal to arrive. Upon arrival of a signal, the
original signal mask is restored.
Возвращаемое значение (Return value)
If sigpause() returns, it was interrupted by a signal and the
return value is -1 with errno set to EINTR.
Атрибуты (Attributes)
For an explanation of the terms used in this section, see
attributes(7).
┌──────────────────────────────────────┬───────────────┬─────────┐
│Interface │ Attribute │ Value │
├──────────────────────────────────────┼───────────────┼─────────┤
│sigpause() │ Thread safety │ MT-Safe │
└──────────────────────────────────────┴───────────────┴─────────┘
Стандарты (Conforming to)
The System V version of sigpause() is standardized in
POSIX.1-2001. It is also specified in POSIX.1-2008, where it is
marked obsolete.
Примечание (Note)
History
The classical BSD version of this function appeared in 4.2BSD.
It sets the process's signal mask to sigmask. UNIX 95
standardized the incompatible System V version of this function,
which removes only the specified signal sig from the process's
signal mask. The unfortunate situation with two incompatible
functions with the same name was solved by the sigsuspend(2)
function, that takes a sigset_t * argument (instead of an int).
Linux notes
On Linux, this routine is a system call only on the Sparc
(sparc64) architecture.
Glibc uses the BSD version if the _BSD_SOURCE feature test macro
is defined and none of _POSIX_SOURCE, _POSIX_C_SOURCE,
_XOPEN_SOURCE, _GNU_SOURCE, or _SVID_SOURCE is defined.
Otherwise, the System V version is used, and feature test macros
must be defined as follows to obtain the declaration:
* Since glibc 2.26: _XOPEN_SOURCE >= 500
* Glibc 2.25 and earlier: _XOPEN_SOURCE
Since glibc 2.19, only the System V version is exposed by
<signal.h>; applications that formerly used the BSD sigpause()
should be amended to use sigsuspend(2).
Смотри также (See also)
kill(2), sigaction(2), sigprocmask(2), sigsuspend(2),
sigblock(3), sigvec(3), feature_test_macros(7)
