/* open file and return fd; to make our life easier, always open RW */
int fs_open(const char *filename, int flags, int mode)
{
int flag, fd;
struct inode_s *ino, *dir;
ino = dir = NULL;
flag = (flags & O_CREAT) ? FS_SEARCH_CREAT : FS_SEARCH_GET;
dir = current_dir();
if ( (ino = find_inode(dir, filename, flag)) == NULL)
goto err;
release_inode(dir);
if (ino->i_zone[0] == 0 && (flags & O_CREAT))
fill_inode(ino, mode);
if (flags & O_TRUNC) {
ino->i_size = 0;
ino->i_dirty = 1;
}
if ( (fd = get_fd(ino, (flags & O_APPEND) ? ino->i_size : 0)) == ERROR)
goto err;
return fd;
err:
release_inode(dir);
release_inode(ino);
return ERROR;
}
static struct inode *ext2_iget_by_inr(struct fs_info *fs, uint32_t inr)
{
const struct ext2_inode *e_inode;
struct inode *inode;
e_inode = ext2_get_inode(fs, inr);
if (!e_inode)
return NULL;
if (!(inode = alloc_inode(fs, inr, sizeof(struct ext2_pvt_inode))))
return NULL;
fill_inode(inode, e_inode);
return inode;
}
/* create new directory */
int fs_mkdir(const char *pathname, mode_t mode)
{
struct inode_s *ino, *dir, *tmpdir;
char path[MAX_PATH], name[MAX_NAME];
ino = dir = tmpdir = NULL;
process_path(pathname, path, name);
tmpdir = current_dir();
/* get inode numbers from parent and new dir */
if ( (dir = find_inode(tmpdir, path, FS_SEARCH_GET)) == NULL)
goto err;
release_inode(tmpdir);
if ( (ino = find_inode(dir, name, FS_SEARCH_ADD)) == NULL)
goto err;
/* fill new dir inode */
fill_inode(ino, mode);
ino->i_mode = (ino->i_mode & ~I_TYPE) | I_DIRECTORY;
/* add '.' */
empty_entry(ino, ino->i_num, ".");
ino->i_nlinks++;
/* and '..' */
empty_entry(ino, dir->i_num, "..");
dir->i_nlinks++;
dir->i_dirty = 1;
/* update dir size */
ino->i_size = DIRENTRY_SIZE * 2;
release_inode(dir);
release_inode(ino);
return OK;
err:
release_inode(tmpdir);
release_inode(dir);
release_inode(ino);
return ERROR;
}
/* Set the uid, gid, mode and time for the inode */
static errcode_t set_inode_extra(ext2_filsys fs, ext2_ino_t cwd,
ext2_ino_t ino, struct stat *st)
{
errcode_t retval;
struct ext2_inode inode;
retval = ext2fs_read_inode(fs, ino, &inode);
if (retval) {
com_err(__func__, retval, "while reading inode %u", ino);
return retval;
}
fill_inode(&inode, st);
retval = ext2fs_write_inode(fs, ino, &inode);
if (retval)
com_err(__func__, retval, "while writing inode %u", ino);
return retval;
}
