fsi_file_t *
ext2lib_open(fsi_t *fsi, const char *path)
{
ext2_ino_t ino;
ext2_filsys *fs = fsip_fs_data(fsi);
ext2_file_t *f;
fsi_file_t *file;
int err;
err = ext2fs_namei_follow(*fs, EXT2_ROOT_INO, EXT2_ROOT_INO,
path, &ino);
if (err != 0) {
errno = ENOENT;
return (NULL);
}
f = malloc(sizeof (*f));
if (f == NULL)
return (NULL);
err = ext2fs_file_open(*fs, ino, 0, f);
if (err != 0) {
free(f);
errno = EINVAL;
return (NULL);
}
file = fsip_file_alloc(fsi, f);
if (file == NULL)
free(f);
return (file);
}
static ext2_ino_t ext2CreateFile(ext2_vd *vd, ext2_inode_t * parent, int type, const char * name)
{
errcode_t retval = -1;
ext2_ino_t newfile = 0;
ext2_ino_t existing;
if(ext2fs_namei_follow(vd->fs, vd->root, parent->ino, name, &existing) == 0) {
errno = EEXIST;
return 0;
}
retval = ext2fs_new_inode(vd->fs, parent->ino, type, 0, &newfile);
if (retval) {
errno = EFAULT;
return 0;
}
while((retval = ext2fs_link(vd->fs, parent->ino, name, newfile, EXT2_FT_REG_FILE)) == EXT2_ET_DIR_NO_SPACE)
{
if (ext2fs_expand_dir(vd->fs, parent->ino) != EXT2_ET_OK) {
errno = EMLINK;
return 0;
}
}
if (retval != EXT2_ET_OK) {
errno = EMLINK;
return 0;
}
ext2fs_inode_alloc_stats2(vd->fs, newfile, +1, 0);
struct ext2_inode inode;
memset(&inode, 0, sizeof(inode));
inode.i_mode = type;
inode.i_atime = inode.i_ctime = inode.i_mtime = time(0);
inode.i_links_count = 1;
inode.i_size = 0;
inode.i_uid = parent->ni.i_uid;
inode.i_gid = parent->ni.i_gid;
if (ext2fs_write_new_inode(vd->fs, newfile, &inode) != 0)
return 0;
return newfile;
}
static ext2_ino_t ext2CreateMkDir(ext2_vd *vd, ext2_inode_t * parent, int type, const char * name)
{
ext2_ino_t newentry = 0;
ext2_ino_t existing;
if(ext2fs_namei_follow(vd->fs, vd->root, parent->ino, name, &existing) == 0){
errno = EEXIST;
return 0;
}
errcode_t err = ext2fs_new_inode(vd->fs, parent->ino, type, 0, &newentry);
if(err != EXT2_ET_OK) {
errno = EFAULT;
return 0;
}
while((err = ext2fs_mkdir(vd->fs, parent->ino, newentry, name)) == EXT2_ET_DIR_NO_SPACE)
{
if(ext2fs_expand_dir(vd->fs, parent->ino) != EXT2_ET_OK) {
errno = EMLINK;
return 0;
}
}
if(err != EXT2_ET_OK) {
errno = EMLINK;
return 0;
}
struct ext2_inode inode;
if(ext2fs_read_inode(vd->fs, newentry, &inode) == EXT2_ET_OK)
{
inode.i_mode = type;
inode.i_uid = parent->ni.i_uid;
inode.i_gid = parent->ni.i_gid;
ext2fs_write_new_inode(vd->fs, newentry, &inode);
}
return newentry;
}
static ext2_ino_t ext2PathToInode(ext2_vd *vd, const char * path)
{
//Sanity check
if(!vd || !path)
return 0;
char filename[EXT2_NAME_LEN];
errcode_t errorcode = 0;
ext2_ino_t ino = 0, parent = vd->cwd_ni && *path != '/' && *path != '\0' ? vd->cwd_ni->ino : vd->root;
const char * ptr = path;
int i;
while(*ptr == '/') ++ptr;
if(*ptr == '\0')
return parent;
while(*ptr != '\0')
{
for(i = 0; *ptr != '\0' && *ptr != '/' && (i < EXT2_NAME_LEN-1); ++ptr, ++i)
filename[i] = *ptr;
filename[i] = '\0';
errorcode = ext2fs_namei_follow(vd->fs, vd->root, parent, filename, &ino);
if(errorcode != EXT2_ET_OK)
return 0;
parent = ino;
while(*ptr == '/') ++ptr;
}
return ino;
}
