/*
* NAME: hfs->mount()
* DESCRIPTION: open an HFS volume; return volume descriptor or 0 (error)
*/
hfsvol *hfs_mount( int os_fd, int pnum)
{
hfsvol *vol, *check;
int mode = HFS_MODE_RDONLY;
/* see if the volume is already mounted */
for (check = hfs_mounts; check; check = check->next)
{
if (check->pnum == pnum && v_same(check, os_fd) == 1)
{
vol = check;
goto done;
}
}
vol = ALLOC(hfsvol, 1);
if (vol == NULL)
ERROR(ENOMEM, NULL);
v_init(vol, mode);
vol->flags |= HFS_VOL_READONLY;
if( v_open(vol, os_fd) == -1 )
goto fail;
/* mount the volume */
if (v_geometry(vol, pnum) == -1 ||
v_mount(vol) == -1)
goto fail;
/* add to linked list of volumes */
vol->prev = NULL;
vol->next = hfs_mounts;
if (hfs_mounts)
hfs_mounts->prev = vol;
hfs_mounts = vol;
done:
++vol->refs;
curvol = vol;
return vol;
fail:
if (vol)
{
v_close(vol);
FREE(vol);
}
return NULL;
}
/*
* NAME: hfs_callback_open()
* DESCRIPTION: open an HFS volume; return volume descriptor or 0 (error)
*/
hfsvol* hfs_callback_open(oscallback func, void* cookie, int mode)
{
hfsvol *vol;
vol = ALLOC(hfsvol, 1);
if (vol == 0)
ERROR(ENOMEM, 0);
v_init(vol, mode);
/* open the medium */
switch (mode & HFS_MODE_MASK)
{
case HFS_MODE_RDWR:
case HFS_MODE_ANY:
break;
case HFS_MODE_RDONLY:
default:
vol->flags |= HFS_VOL_READONLY;
}
/* set up vol->priv */
v_callback_open(vol, func, cookie);
/* mount the volume */
if (v_geometry(vol, 0 /*we don't see partition map*/) == -1 ||
v_mount(vol) == -1)
goto fail;
assert(func != 0);
assert(cookie != 0);
/*done*/
++vol->refs;
return vol;
fail:
if (vol)
{
v_close(vol);
FREE(vol);
}
return 0;
}
/*
* NAME: hfs->mount()
* DESCRIPTION: open an HFS volume; return volume descriptor or 0 (error)
*/
hfsvol *hfs_mount(const char *path, int pnum, int mode)
{
hfsvol *vol, *check;
/* see if the volume is already mounted */
for (check = hfs_mounts; check; check = check->next)
{
if (check->pnum == pnum && v_same(check, path) == 1)
{
/* verify compatible read/write mode */
if (((check->flags & HFS_VOL_READONLY) &&
! (mode & HFS_MODE_RDWR)) ||
(! (check->flags & HFS_VOL_READONLY) &&
(mode & (HFS_MODE_RDWR | HFS_MODE_ANY))))
{
vol = check;
goto done;
}
}
}
vol = ALLOC(hfsvol, 1);
if (vol == 0)
ERROR(ENOMEM, 0);
v_init(vol, mode);
/* open the medium */
switch (mode & HFS_MODE_MASK)
{
case HFS_MODE_RDWR:
case HFS_MODE_ANY:
if (v_open(vol, path, HFS_MODE_RDWR) != -1)
break;
if ((mode & HFS_MODE_MASK) == HFS_MODE_RDWR)
goto fail;
case HFS_MODE_RDONLY:
default:
vol->flags |= HFS_VOL_READONLY;
if (v_open(vol, path, HFS_MODE_RDONLY) == -1)
goto fail;
}
/* mount the volume */
if (v_geometry(vol, pnum) == -1 ||
v_mount(vol) == -1)
goto fail;
/* add to linked list of volumes */
vol->prev = 0;
vol->next = hfs_mounts;
if (hfs_mounts)
hfs_mounts->prev = vol;
hfs_mounts = vol;
done:
++vol->refs;
curvol = vol;
return vol;
fail:
if (vol)
{
v_close(vol);
FREE(vol);
}
return 0;
}
