按树的形状列出目录中内容 （程序清单4-7）

结果：/home/suqin/apuetest

代码：未考虑通用性和文件目录访问权限问题

#include"apue.h"#include<dirent.h>unsigned int total,reg,dir,chr,blk,fifo,lnk,sock;int traverse(char *pathname,int dep){DIR *dp;struct dirent *dirp;int depth=dep,i;char tmp[500],tmp2[500];strcpy(tmp,pathname);struct stat buf;if( (dp=opendir(pathname))==NULL)err_sys("opendir %s error!",tmp);while( (dirp=readdir(dp))!=NULL){if(strcmp(dirp->d_name,".")==0) continue;if(strcmp(dirp->d_name,"..")==0) continue;strcpy(tmp2,tmp);strcat(tmp2,"/");strcat(tmp2,dirp->d_name);for(i=0;i<depth;i++)printf("|    ");printf("|----%s\n",dirp->d_name);if(lstat(tmp2,&buf)<0){err_ret("lstat error:%s",tmp2);continue;}if(S_ISREG(buf.st_mode)) {reg++;continue;}else if(S_ISCHR(buf.st_mode)) {chr++;continue;}else if(S_ISBLK(buf.st_mode)) {blk++;continue;}else if(S_ISFIFO(buf.st_mode)) {fifo++;continue;}else if(S_ISLNK(buf.st_mode)) {lnk++;continue;}else if(S_ISSOCK(buf.st_mode)) {sock++;continue;}else if(S_ISDIR(buf.st_mode)) {dir++;traverse(tmp2,depth+1);continue;}else printf("No such file style!\n");}return 0;}int main(int argc,char *argv[]){if(argc!=2) err_sys("argc!=2");printf("%s\n",argv[1]);traverse(argv[1],0);printf("\n reg=%d\n dir=%d\n chr=%d\n blk=%d\n fifo=%d\n sock=%d\n",reg,dir,chr,blk,fifo,sock);}