Question

In a “C” code I would like to list all the files in a directory and delete the oldest one. How do I do that?

Can I use popen for that or we have any other solutions??

Thanks,

Answer 1

From the tag, I assume that you want to do this in a POSIX compliant system. In this case a code snippet for listing files in a folder would look like this:

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

DIR* dp;
struct dirent* ep;
char* path = "/home/mydir";

dp = opendir(path);
if (dp != NULL)
{
  printf("Dir content:\n");
  while(ep = readdir(dp))
  {
    printf("%s\n", ep->d_name);
  }
}
closedir(dp);

To check file creation or modification time, use stat (man 2 stat). For removing file, just use function remove(const char* path)