alarm: nastavit budík pro doručení signálu

Originální popis anglicky: alarm - set an alarm clock for delivery of a signal

Návod, kniha: Linux Programmer's Manual

STRUČNĚ

#include <unistd.h>
 
unsigned int alarm(unsigned int seconds);

POPIS / INSTRUKCE

alarm arranges for a SIGALRM signal to be delivered to the process in seconds seconds. If seconds is zero, no new alarm is scheduled. In any event any previously set alarm is cancelled.

NÁVRATOVÁ HODNOTA

alarm returns the number of seconds remaining until any previously scheduled alarm was due to be delivered, or zero if there was no previously scheduled alarm.

NOTES

alarm and setitimer share the same timer; calls to one will interfere with use of the other. sleep() may be implemented using SIGALRM; mixing calls to alarm() and sleep() is a bad idea. Scheduling delays can, as ever, cause the execution of the process to be delayed by an arbitrary amount of time.

ODPOVÍDAJÍCÍ

SVr4, SVID, POSIX, X/OPEN, BSD 4.3

SOUVISEJÍCÍ

gettimeofday(2), pause(2), select(2), setitimer(2), sigaction(2), signal(2), sleep(3)