List all files in directory in C

[crazyfuturamanoob]

How to list any files in any directory with C?
(no need to list folders, just the files)

And maybe get a neat array which contains the filenames?

[crazyfuturamanoob]

This seems to list all files in current directory:


#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <glob.h>

int main( int argc, char *argv[] )
{
glob_t data;

switch( glob("*.*", 0, NULL, &data ) )
{
case 0:
break;
case GLOB_NOSPACE:
printf( "Out of memory\n" );
break;
case GLOB_ABORTED:
printf( "Reading error\n" );
break;
case GLOB_NOMATCH:
printf( "No files found\n" );
break;
default:
break;
}

int i;
for(i=0; i<data.gl_pathc; i++)
{
printf( "%s\n", data.gl_pathv[i] );
}

globfree( &data );


return 0;
}


But I want to list all files in a subdirectory. How to change working directory?

[mdurham]

glob("sub1/sub2/sub3/*.*", 0, NULL, &data )

[Compyx]

Google for 'dirent.h'.

[nvteighen]

If you have the manpages-dev package installed:



man 3 readdir

[crazyfuturamanoob]

glob("sub1/sub2/sub3/*.*", 0, NULL, &data )
Exactly what I was looking for!


Google for 'dirent.h'.

If you have the manpages-dev package installed:



man 3 readdir


An example I found segfaulted, and debugger said it doesn't work in 64bit.
I probably missed something or did something wrong but whatever, glob does it with less work.

Wohoo I got 800 posts!

[nvteighen]

An example I found segfaulted, and debugger said it doesn't work in 64bit.
I probably missed something or did something wrong but whatever, glob does it with less work.


You surely missed something, as readdir() involves the use of a pointer to a directory "class"/structure created by opendir(). It's actually similar to fopen() and such.

EDIT:
An example that doesn't segfault nor leaks memory. It lists the elements on / (root directory).



#include <stdio.h>

#include <sys/types.h>
#include <dirent.h>

int main(void)
{
DIR *mydir = opendir("/");

struct dirent *entry = NULL;

while((entry = readdir(mydir))) /* If we get EOF, the expression is 0 and
* the loop stops. */
{
printf("%s\n", entry->d_name);
}

closedir(mydir);

return 0;
}