4
這個程序會創建一個子進程,子進程會等待一個ALARM信號,當這個信號到達3秒後,f函數會抓取父進程ID,併發送一個SIGINT信號給殺死它,所以孩子3秒鐘錯誤編譯過程SIGALRM kill
#include <stdio.h>
#include <unistd.h>
#include <signal.h>
#include <string.h>
void f(int sig)
{
kill(getppid(),SIGINT);
}
main()
{
int f=fork();
if(f==0)
{
signal(SIGALRM,f);
alarm(3);
}
else
{
pause();
}
}
後殺死父母,我得到這個錯誤:
test13.c: In function ‘main’:
test13.c:16:3: warning: passing argument 2 of ‘signal’ makes pointer from integer without a cast
/usr/include/signal.h:101:23: note: expected ‘__sighandler_t’ but argument is of type ‘int’
跺腳是什麼意思? – 2012-04-23 01:23:02
嘗試重命名變量,因此沒有多個名爲'f'的東西 – 2012-04-23 01:23:29
啊是啊是的... f叉... blablabla .. thx:D – 2012-04-23 01:23:59