p4-16.c

UNIX程序设计教程

#include <unistd.h>
#include <stdlib.h>
#include <limits.h>
#include <sys/stat.h>
#include "err_exit.h"
char * get_current_dir();
int main(int argc, char*argv[])
{
    char *pathptr;
    char *fileptr;
    
    if(argc != 2){
       printf("Usage: a.out <pathname>\n");
       exit(EXIT_FAILURE);
    }
    /* 查看当前目录 */
    pathptr = get_current_dir();            /* 程序1-3 */        
    printf("curren directory is: %s\n",pathptr);
    free(pathptr);
    /* 创建新目录 */
    if( mkdir(argv[1], S_IRWXU|S_IRGRP|S_IXGRP|S_IROTH) < 0)
       err_exit("mkdir failed");
    /* 新目录成为当前目录 */    
    if (chdir(argv[1]) < 0)
       err_exit("chdir failed");
    pathptr = get_current_dir();
    printf("mkdir successful.\n I am in new directory: %s\n", pathptr);
    /* 删除此新目录 */    
    rmdir(pathptr);
    printf("%s is removed\n",pathptr);
    free(pathptr);
}