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Code: Select all

    struct dirent *elem;
    struct stat st;
    
    const char *dirName = luaL_checkstring(L, 1);        // luaL_checkstring() just gives the name of the folder to be listed
    
    DIR *dir = opendir(dirName);
    
    while ((elem = readdir(dir))) {
        lua_pushstring(L, elem->d_name);
        lua_pushboolean(L, elem->d_type == DT_DIR);
        stat(elem->d_name, &st);
        lua_pushnumber(L, st.st_size);
    }

Code: Select all

#include <stdio.h>
#include <dirent.h>
#include <sys/stat.h>
#include <string.h>
#include <unistd.h>

int myReaddir(const char *Path) {
  static char   path[PATH_MAX];
  struct dirent *dent;
  struct stat   st;
  DIR           *dp;
  char          *p, *end = path + PATH_MAX - 1;
  size_t        len = strlen(Path);

  if(Path[0] != '/') {
    /* a relative directory */
    if(getcwd(path, sizeof(path)) == NULL) {
      return 1;
    }
  }
  else if(len < PATH_MAX-1) {
    /* an absolute directory */
    strcpy(path, Path);
  }
  else {
    return 1;
  }

  /* this is where we append each entry's name to the path */
  p = path + len;

  /* make sure there's a trailing slash */
  if(p[-1] != '/') {
    if(p < end-1) {
      *p++ = '/';
      *p = 0;
    }
  }

  /* open the directory */
  dp = opendir(Path);
  if(dp == NULL) {
    return 1;
  }

  /* loop through each directory entry */
  while((dent = readdir(dp)) != NULL) {
    /* let's make sure the path + name fit */
    if(p + strlen(dent->d_name) < end) {
      /* append the name to the path */
      strcpy(p, dent->d_name);

      /* stat the path */
      if(stat(path, &st) != 0) {
        /* an error, do what you want */
      }
      else {
        /* everything successful for this entry */
        printf("%s\n", dent->d_name);
        printf("  Directory: %s\n", dent->d_type == DT_DIR ? "true" : "false");
        printf("  Size:      %zu\n", st.st_size);
      }
    }
    else {
      /* this name was too long, do what you want */
    }
  }

  closedir(dp);

  return 0;
}

int main(int argc, char *argv[]) {
  const char *path = argv[1];

  if(path != NULL)
    return myReaddir(path);
  else
    return 1;
}