進程返回值

#include
#include <stdlib.h>
#include <sys/wait.h>


int main()
{
pid_t pid;
int status;
if((pid = fork()) < 0)
printf("fork error");
else if(pid == 0)
exit(7);


if(wait(&status) != pid)
printf("wait error");
printf("status:%d\n",status);


if((pid = fork())<0)
printf("fork error");
else if(pid == 0)
abort();


if(wait(&status) != pid)
printf("wait error");
printf("status:%d\n",status);;


if((pid = fork())<0)
printf("fork error");
else if (pid == 0)
status /= 0;


if(wait(&status) != pid)
printf("wait error");
printf("status:%d\n",status);
return 0;

}

來源：uninx環境高級編程