Listing files from within a C program?

PsychosisNode · 11-15-2003, 04:48 PM

C'mon, you can help a n00b who can't even do this (please!):

How does one list files from within a C program?

What I need to do is to get a list of filenames in a directory that end with a particular extension, so I can put them into a GTK+ combobox for selection...

Thanks in advance,

-Taiyo

Kurt M. Weber · 11-15-2003, 05:06 PM

man opendir
man readdir

jim mcnamara · 11-15-2003, 08:06 PM

assume you want to look in the current dir "." for files like *.tmp

Code:

#include <dirent.h>
#include <string.h>
#include <stdio.h>
int main(int argc, char *argv[]){
	   struct dirent **namelist;
	   int n;

	   n = scandir(".", &namelist, 0, alphasort);
	   if (n < 0)
	       perror("scandir");
	   else {
	       while(n--) {
                                   if(strstr(namelist[n]->d_name,".tmp")
		            printf("%s\n", namelist[n]->d_name);
		   free(namelist[n]);
	       }
	       free(namelist);
	   }
                  return 0;
}

jim mcnamara · 11-15-2003, 08:07 PM

PS: that would be:
man scandir, not man opendir

PsychosisNode · 11-16-2003, 10:40 AM

Thakyou people! This is working so far...

Code:

  int count = 0;
  GList *iwads = NULL;
  iwad_dir = opendir( "/usr/local/share/games/doom" );
  while( NULL != ( iwad_dir_entry = readdir( iwad_dir ) ) ){
    sprintf( tempstring[count], "%s", iwad_dir_entry->d_name);
    iwads = g_list_append( iwads, (gpointer)&tempstring[count] );
    count++;
  }
  closedir( iwad_dir );


  select_iwad = gtk_combo_new();
  gtk_combo_set_popdown_strings( GTK_COMBO( select_iwad ), iwads );
  gtk_combo_set_value_in_list( GTK_COMBO( select_iwad ), FALSE, FALSE );
  gtk_box_pack_start( GTK_BOX( vbox1 ), select_iwad, TRUE, TRUE, 0 );
  gtk_widget_show( select_iwad );

/me wonders who can guess what he's coding?