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List all contents of a given directory

Submitted By: gabehabe

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Rating:

Views: 421

Language: C++

Last Modified: August 7, 2008

Instructions: This is also compatible with C, just replace #include with #include and away you go! =)

Snippet

/*
* A function to list all contents of a given directory
* author: Danny Battison
* contact: gabehabe@hotmail.com
*/
#include <dirent.h> // directory header
#include <cstdio>
void listdir (const char *path)
{
// first off, we need to create a pointer to a directory
DIR *pdir = NULL; // remember, it's good practice to initialise a pointer to NULL!
pdir = opendir (path); // "." will refer to the current directory
struct dirent *pent = NULL;
if (pdir == NULL) // if pdir wasn't initialised correctly
{ // print an error message and exit the program
printf ("\nERROR! pdir could not be initialised correctly");
return; // exit the function
} // end if
while (pent = readdir (pdir)) // while there is still something in the directory to list
{
if (pent == NULL) // if pent has not been initialised correctly
{ // print an error message, and exit the program
printf ("\nERROR! pent could not be initialised correctly");
return; // exit the function
}
// otherwise, it was initialised correctly. let's print it on the console:
printf ("%s\n", pent->d_name);
}
// finally, let's close the directory
closedir (pdir);
}
/** EXAMPLE USAGE **/
int main ()
{
listdir ("C:\\");
return 0;
}

Copy & Paste

/*
 * A function to list all contents of a given directory
 * author: Danny Battison
 * contact: gabehabe@hotmail.com
 */

#include <dirent.h> // directory header
#include <cstdio>

void listdir (const char *path)
{
    // first off, we need to create a pointer to a directory
    DIR *pdir = NULL; // remember, it's good practice to initialise a pointer to NULL!
    pdir = opendir (path); // "." will refer to the current directory
    struct dirent *pent = NULL;
    if (pdir == NULL) // if pdir wasn't initialised correctly
    { // print an error message and exit the program
        printf ("\nERROR! pdir could not be initialised correctly");
        return; // exit the function
    } // end if

while (pent = readdir (pdir)) // while there is still something in the directory to list
    {
        if (pent == NULL) // if pent has not been initialised correctly
        { // print an error message, and exit the program
            printf ("\nERROR! pent could not be initialised correctly");
            return; // exit the function
        }
        // otherwise, it was initialised correctly. let's print it on the console:
        printf ("%s\n", pent->d_name);
    }

// finally, let's close the directory
    closedir (pdir);
}

/** EXAMPLE USAGE **/
int main ()
{
    listdir ("C:\\");
    return 0;
}

Comments
bbq 2008-09-11 23:14:39
Intersting, was looking for a way to create a list of all my music, this might get me on the right path :)
dor1997 2008-09-18 08:43:07
Pretty cool! Good work!