Consider the following code.handler () {;}main () {struct sigaction actA, actB;sigset t oldset;sigset_t addset;sigemptyset (&addSet);sigaddset (&addset,SIGUSR1);sigprocmask (SIG BLOCK, &addset,&oldset); //-- Not using oldset hereactA. sa handler=handler;actA. sa flags=0;sigemptyset(&actA.sa mask) ;sigaction (SIGTERM, &actA, (struct sigaction *) 0);Select all the signals that will be blocked during the execution of handler() after the successful execution of this code.O SIGUSR1O SIGUSR2O SIGTERM

truct sigaction actA, actB; igset_t oldset; igset_t addset; igemptyset(&addset); igaddset(&addSet,SIGUSR1); igprocmask(SIG_BLOCK, &addSet,&oldset); //-- Not using oldset here ctA.sa_handler=handler; ctA. sa_flags=0; igemptyset(&actA.sa_mask); igaction(SIGTERM,&actA, (struct sigaction *)0); ct all the signals that will be blocked during the execution of handler() after the successful execution of this code.

truct sigaction actA, actB; igset_t oldset; igset_t addset; igemptyset(&addset); igaddset(&addSet,SIGUSR1); igprocmask(SIG_BLOCK, &addSet,&oldset); //-- Not using oldset here ctA.sa_handler=handler; ctA. sa_flags=0; igemptyset(&actA.sa_mask); igaction(SIGTERM,&actA, (struct sigaction *)0); ct all the signals that will be blocked during the execution of handler() after the successful execution of this code.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

Consider the following code.
handler () {;}
main () {
struct sigaction actA, actB;
sigset t oldset;
sigset_t addset;
sigemptyset (&addSet);
sigaddset (&addset,SIGUSR1);
sigprocmask (SIG BLOCK, &addset,&oldset); //-- Not using oldset here
actA. sa handler=handler;
actA. sa flags=0;
sigemptyset(&actA.sa mask) ;
sigaction (SIGTERM, &actA, (struct sigaction *) 0);
Select all the signals that will be blocked during the execution of handler() after the successful execution of this code.
O SIGUSR1
O SIGUSR2
O SIGTERM

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