linux 基礎代碼學習－－文件目錄的顯示

編寫show_dir.c

#include <unistd.h>
#include <stdio.h>
#include <dirent.h>
#include <string.h>
#include <sys/stat.h>
#include <stdlib.h>


void printdir(char *dir,int depth)
{
DIR *dp;
struct dirent *entry;
struct stat statbuf;

if((dp = opendir(dir)) == NULL){
fprintf(stderr,"cannot open directory: %s\n",dir);
return;
}
chdir(dir);
while((entry = readdir(dp))!= NULL){
lstat(entry->d_name,&statbuf);
if(S_ISDIR(statbuf.st_mode)){

if(strcmp(".",entry->d_name)==0|| strcmp("..",entry->d_name)==0)
continue;
printf("%*s%s/\n",depth,"",entry->d_name);

/* recurse at a new indent level */
printdir(entry->d_name,depth+4);
}
else printf("%*s%s/\n",depth,"",entry->d_name);
}
chdir("..");
closedir(dp);

}

int main(int argc,char* argv[]){
char *topdir = ".";
if(argc>=2)
topdir= argv[1];
printf("Directory scan of %s\n",topdir);
printdir(topdir,0);
printf("done.\n");

exit(0);
}

編譯腳本：
gcc -o show_dir show_dir.c

執行腳本：
./show_dir /home/mingjie