UNIX环境高级编程学习之第八章进程控制-用父子进程实现打开kate，返回kate关闭状态

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
int main()
{
pid_t pid= fork();
if (pid < 0)
{
printf("fork error msg=%s/n", strerror(errno));
exit(-1);
}else if (pid == 0) // clild process
{
execlp("kate", "kate > /dev/null", "./fork.c",(char*)0);
}else{ // parent process
int ret;
waitpid(pid, &ret, 0);
printf("pid = %u, ret = %d/n", pid, ret);
}
return 0;
}