обработка сигналов с семантикой System V (signal handling with System V semantics)
Имя (Name)
sysv_signal - signal handling with System V semantics
Синопсис (Synopsis)
#define _GNU_SOURCE /* See feature_test_macros(7) */
#include <signal.h>
typedef void (*sighandler_t)(int);
sighandler_t sysv_signal(int signum, sighandler_t handler);
Описание (Description)
The sysv_signal() function takes the same arguments, and performs
the same task, as signal(2).
However sysv_signal() provides the System V unreliable signal
semantics, that is: a) the disposition of the signal is reset to
the default when the handler is invoked; b) delivery of further
instances of the signal is not blocked while the signal handler
is executing; and c) if the handler interrupts (certain) blocking
system calls, then the system call is not automatically
restarted.
Возвращаемое значение (Return value)
The sysv_signal() function returns the previous value of the
signal handler, or SIG_ERR on error.
Ошибки (Error)
As for signal(2).
Атрибуты (Attributes)
For an explanation of the terms used in this section, see
attributes(7).
┌──────────────────────────────────────┬───────────────┬─────────┐
│Interface │ Attribute │ Value │
├──────────────────────────────────────┼───────────────┼─────────┤
│sysv_signal() │ Thread safety │ MT-Safe │
└──────────────────────────────────────┴───────────────┴─────────┘
Стандарты (Conforming to)
This function is nonstandard.
Примечание (Note)
Use of sysv_signal() should be avoided; use sigaction(2) instead.
On older Linux systems, sysv_signal() and signal(2) were
equivalent. But on newer systems, signal(2) provides reliable
signal semantics; see signal(2) for details.
The use of sighandler_t is a GNU extension; this type is defined
only if the _GNU_SOURCE feature test macro is defined.
Смотри также (See also)
sigaction(2), signal(2), bsd_signal(3), signal(7)
