linux 系统编程 之信号 test10_1.c

#include <stdio.h>

#include <sys/types.h>

#include <unistd.h>

#include <signal.h>

//#include <stdarg.h> ??

#include <stdlib.h>

void terminatehandler(int signumber);

int main(void)

{

char buffer1[100],buffer2[100];

int i;

if(signal(SIGTERM,&terminatehandler)==SIG_ERR) //SIG_IGN 忽略 SIG_DFL 默认

{

printf("Couldn't register signal handler!\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 terminatehandler(int signumber)

{

printf("catch signal SIGTERM.\n");

exit(0);

}

/*

单信号 单函数

kill pid

kill -s SIGTERM pid

*/