reading a directory

Read a Directory

This code reads a directory passed as a string and returns a pointer to a special struct called Directory.

Snippet

1. /*


2. * dirlist.c



3. *


4.  * mani


5. */


6.  


7. #include <dirent.h>


8. #include <stdio.h>


9. #include <string.h>



10. #include <stdlib.h>


11. #include "dirlist.h"


12.  


13. Directory* readDirectory(char* dirname)


14. {


15.         Directory* d = (Directory*) malloc(sizeof(Directory) );



16.         d->files = (char**) malloc(0);


17.         d->len = 0;



18.         d->files[d->len] = 0;


19.         DIR *dir;



20.         struct dirent *de;


21.         dir = opendir(dirname);


22.         if (dir == NULL)



23.         {


24.                 printf("Could not open directry \"%s\"\n", dirname);



25.                 exit (1);


26.         }



27.        


28.         while ( (de = readdir(dir) ) != NULL )



29.         {


30.                 /*


31.                 * We need to resize the char** in the Directory struct



32.                 * and then allocate enough space in the char* for the file name


33.                 * I use sprintf instead of strcpy, or strncpy for no real reason



34.                 */


35.                 d->files = (char**) realloc(d->files, sizeof(char*) * ++(d->len) );



36.                 d->files[d->len - 1] = (char*) malloc (sizeof(char) * (strlen(de->d_name) + 1) );



37.                 sprintf(d->files[d->len - 1], "%s", de->d_name);



38.         }


39.         closedir(dir);


40.         return d;



41. }


42.  


43.