清单1-6
#include"apue.h" #include<errno.h> int main(int argc,char *argv[]) { fprintf(stderr,"EACCES:%s\n",strerror(EACCES)); errno=ENOENT; perror(argv[0]); exit(0); }
清单1-7 返回 Segmentation fault (core dumped)
#include"apue.h" int main(void) { fprintf("uid = %d, gid = %d\n",getuid(),getgid()); exit(0); }
原文：http://www.cnblogs.com/whutqueqiaoxian/p/5743034.html