sigdemo3.c

#include <stdio.h>

#include <signal.h>

#define INPUTLEN 100

main(int ac, char *av[])

{

void inthandler(int);

void quithandler(int);

char input[INPUTLEN];

int nchars;

signal (SIGINT, inthandler);

signal(SIGQUIT, quithandler);

do{

printf("\ntype msg\n");

nchars = read(0, input, (INPUTLEN-1));

if (nchars == -1)

perror("read return error");

else

{

input[nchars] = '\0';

printf("typed : %s", input);

}

}while(strncmp(input,"quit",4)!=0);

}

void inthandler(int s)

{

printf("receive signal %d........ waiting\n",s);

sleep(2);

printf("leaving inthandler......\n");

}

void quithandler(int s)

{

printf("receive signal %d...... waiting.......\n",s);

sleep(3);

printf("lesving quithandler\n");

}