Hi, My problem is I want to use the getdents() syscall from perl to receive a file list since the h2ph interface feels a bit awkward to me I'm trying to use Inline C function and receive the contents of the directory back into a variable since speed is an issue. this is my first time using Inline C in perl and there isn't a lot of documentation about it's usage and it seems that Inline has some internals variables to push the data back into perl ideally as a scalar. 
#!/usr/bin/env perl
use 5.012;
use strict;
use warnings;

my $str = &listfiles('<Directory>');

print $str;

use Inline C => <<'END_OF_C_CODE';
#include <dirent.h>     /* Defines DT_* constants */
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <sys/syscall.h>

#define handle_error(msg) do { perror(msg); exit(EXIT_FAILURE); } whil
+e (0)

struct linux_dirent {
   long           d_ino;
   off_t          d_off;
   unsigned short d_reclen;
   char           d_name[];
};

#define BUF_SIZE 1024*1024*5
int listfiles(int argc, char *argv[])
{
   int fd, nread;
   char buf[BUF_SIZE];
   struct linux_dirent *d;
   int bpos;
   char d_type;

   fd = open(argc > 1 ? argv[1] : ".", O_RDONLY | O_DIRECTORY);
   if (fd == -1)
       handle_error("open");

   for ( ; ; ) {
       nread = syscall(SYS_getdents, fd, buf, BUF_SIZE);
       if (nread == -1)
           handle_error("getdents");

       if (nread == 0)
           break;

       for (bpos = 0; bpos < nread;) {
           d = (struct linux_dirent *) (buf + bpos);
           if (d->d_ino != 0) printf("%s\n", (char *) d->d_name);
           bpos += d->d_reclen;
       }
   }
   exit(EXIT_SUCCESS);
}
END_OF_C_CODE

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In reply to using syscalls in perl through inline c by ofer

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