opendir.cpp

Go to the documentation of this file.

/*
 * Copyright (C) 2009 Niek Linnenbank
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
#include <FreeNOS/User.h>
#include <FileSystem.h>
#include <Directory.h>
#include <errno.h>
#include "dirent.h"
#include "fcntl.h"
#include "unistd.h"
#include "sys/stat.h"
 
DIR * opendir(const char *dirname)
{
    Dirent *dirent;
    DIR *dir;
    int fd;
    struct stat st;
    Error e;
 
    // First stat the directory
    if (stat(dirname, &st) < 0)
    {
        return (ZERO);
    }
 
    // Try to open the directory
    if ((fd = open(dirname, ZERO)) < 0)
    {
        return (ZERO);
    }
 
    // Allocate Dirents
    dirent = new Dirent[1024];
    memset(dirent, 0, 1024 * sizeof(Dirent));
 
    // Allocate DIR object
    dir = new DIR;
    dir->fd        = fd;
    dir->buffer    = new struct dirent[1024];
    memset(dir->buffer, 0, 1024 * sizeof(struct dirent));
    dir->current   = 0;
    dir->count     = 0;
    dir->eof       = false;
 
    // Read them all
    if ((e = read(fd, dirent, sizeof(Dirent) * 1024)) < 0)
    {
        e = errno;
        closedir(dir);
        errno = e;
        return (ZERO);
    }
 
    // Fill in the dirent structs
    for (Size i = 0; i < e / sizeof(Dirent); i++)
    {
        u8 types[] =
        {
            DT_REG,
            DT_DIR,
            DT_BLK,
            DT_CHR,
            DT_LNK,
            DT_FIFO,
            DT_SOCK,
        };
        strlcpy((dir->buffer)[i].d_name, dirent[i].name, DIRLEN);
        (dir->buffer)[i].d_type = types[dirent[i].type];
    }
    dir->count = e / sizeof(Dirent);
    delete dirent;
 
    // Set errno
    errno = ESUCCESS;
 
    // Success
    return dir;
}