linux 系统编程之信号 test10_2.c

#include <stdio.h>

#include <stdlib.h>

#include <sys/types.h>

#include <unistd.h>

#include <signal.h>

#include <stdarg.h>

/* ctrl+ c SIGINT

* ctrl + z SIGTSTP

ctrl + \ SIGQUIT

* kill -s SIGXXX pid

*

*

*/

void intermithandler(int signumber);

void continuehandler(int signumber);

void terminatehandler(int signumber);

int main(void)

{

char buffer1[100],buffer2[100];

int i;

if(signal(SIGINT,&intermithandler)==SIG_ERR)

{

printf("Couldn¡¯t register signal handler for SIGINT!\n");

}

if(signal(SIGTSTP,&intermithandler)==SIG_ERR)

{

printf("Couldn¡¯t register signal handler for SIGTSTP!\n");

}

if(signal(SIGCONT,&continuehandler)==SIG_ERR)

{

printf("Couldn¡¯tregister signal handler for SIGCONT!\n");

}

if(signal(SIGTERM,&terminatehandler)==SIG_ERR)

{

printf("Couldn¡¯t register signal handler for SIGTERM!\n");

}

printf("Pid of This Process:%6d.",getpid());

for( ; ; )

{

fgets(buffer1,sizeof(buffer1),stdin);

for(i=0;i<100;i++)

{

if(buffer1[i]>=97 && buffer1[i]<=122)

buffer2[i]=buffer1[i]-32;

else

buffer2[i]=buffer1[i];

}

printf("Your input is: %s\n\n",buffer2);

}

return 0;

}

void intermithandler(int signumber)

{

printf("catch signal %d.;\n",signumber);

}

void continuehandler(int sinnumber)

{

printf("Continue code.\n");

}

void terminatehandler(int signumber)

{

printf("signal SIGTERM.\n");

exit(0); //程序结束

}

/*

多信号 多函数

*/