diff options
Diffstat (limited to 'qemu/roms/openbios/fs/hfs/hfs.c')
| -rw-r--r-- | qemu/roms/openbios/fs/hfs/hfs.c | 747 |
1 files changed, 747 insertions, 0 deletions
diff --git a/qemu/roms/openbios/fs/hfs/hfs.c b/qemu/roms/openbios/fs/hfs/hfs.c new file mode 100644 index 000000000..0c5fefb47 --- /dev/null +++ b/qemu/roms/openbios/fs/hfs/hfs.c @@ -0,0 +1,747 @@ +/* + * libhfs - library for reading and writing Macintosh HFS volumes + * Copyright (C) 1996-1998 Robert Leslie + * + * 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 2 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, write to the Free Software + * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, + * MA 02110-1301, USA. + * + * $Id: hfs.c,v 1.15 1998/11/02 22:09:00 rob Exp $ + */ + +#include "config.h" +#include "libhfs.h" +#include "data.h" +#include "block.h" +#include "medium.h" +#include "file.h" +#include "btree.h" +#include "node.h" +#include "record.h" +#include "volume.h" + +const char *hfs_error = "no error"; /* static error string */ + +hfsvol *hfs_mounts; /* linked list of mounted volumes */ + +static +hfsvol *curvol; /* current volume */ + + +/* + * NAME: getvol() + * DESCRIPTION: validate a volume reference + */ +static +int getvol(hfsvol **vol) +{ + if (*vol == NULL) + { + if (curvol == NULL) + ERROR(EINVAL, "no volume is current"); + + *vol = curvol; + } + + return 0; + +fail: + return -1; +} + +/* High-Level Volume Routines ============================================== */ + +/* + * 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->umount() + * DESCRIPTION: close an HFS volume + */ +int hfs_umount(hfsvol *vol) +{ + int result = 0; + + if (getvol(&vol) == -1) + goto fail; + + if (--vol->refs) + { + goto done; + } + + /* close all open files and directories */ + + while (vol->files) + { + if (hfs_close(vol->files) == -1) + result = -1; + } + + while (vol->dirs) + { + if (hfs_closedir(vol->dirs) == -1) + result = -1; + } + + /* close medium */ + + if (v_close(vol) == -1) + result = -1; + + /* remove from linked list of volumes */ + + if (vol->prev) + vol->prev->next = vol->next; + if (vol->next) + vol->next->prev = vol->prev; + + if (vol == hfs_mounts) + hfs_mounts = vol->next; + if (vol == curvol) + curvol = NULL; + + FREE(vol); + +done: + return result; + +fail: + return -1; +} + +/* + * NAME: hfs->umountall() + * DESCRIPTION: unmount all mounted volumes + */ +void hfs_umountall(void) +{ + while (hfs_mounts) + hfs_umount(hfs_mounts); +} + +/* + * NAME: hfs->getvol() + * DESCRIPTION: return a pointer to a mounted volume + */ +hfsvol *hfs_getvol(const char *name) +{ + hfsvol *vol; + + if (name == NULL) + return curvol; + + for (vol = hfs_mounts; vol; vol = vol->next) + { + if (d_relstring(name, vol->mdb.drVN) == 0) + return vol; + } + + return NULL; +} + +/* + * NAME: hfs->setvol() + * DESCRIPTION: change the current volume + */ +void hfs_setvol(hfsvol *vol) +{ + curvol = vol; +} + +/* + * NAME: hfs->vstat() + * DESCRIPTION: return volume statistics + */ +int hfs_vstat(hfsvol *vol, hfsvolent *ent) +{ + if (getvol(&vol) == -1) + goto fail; + + strcpy(ent->name, vol->mdb.drVN); + + ent->flags = (vol->flags & HFS_VOL_READONLY) ? HFS_ISLOCKED : 0; + + ent->totbytes = vol->mdb.drNmAlBlks * vol->mdb.drAlBlkSiz; + ent->freebytes = vol->mdb.drFreeBks * vol->mdb.drAlBlkSiz; + + ent->alblocksz = vol->mdb.drAlBlkSiz; + ent->clumpsz = vol->mdb.drClpSiz; + + ent->numfiles = vol->mdb.drFilCnt; + ent->numdirs = vol->mdb.drDirCnt; + + ent->crdate = d_ltime(vol->mdb.drCrDate); + ent->mddate = d_ltime(vol->mdb.drLsMod); + ent->bkdate = d_ltime(vol->mdb.drVolBkUp); + + ent->blessed = vol->mdb.drFndrInfo[0]; + + return 0; + +fail: + return -1; +} + + +/* High-Level Directory Routines =========================================== */ + +/* + * NAME: hfs->chdir() + * DESCRIPTION: change current HFS directory + */ +int hfs_chdir(hfsvol *vol, const char *path) +{ + CatDataRec data; + + if (getvol(&vol) == -1 || + v_resolve(&vol, path, &data, NULL, NULL, NULL) <= 0) + goto fail; + + if (data.cdrType != cdrDirRec) + ERROR(ENOTDIR, NULL); + + vol->cwd = data.u.dir.dirDirID; + + return 0; + +fail: + return -1; +} + +/* + * NAME: hfs->getcwd() + * DESCRIPTION: return the current working directory ID + */ +unsigned long hfs_getcwd(hfsvol *vol) +{ + if (getvol(&vol) == -1) + return 0; + + return vol->cwd; +} + +/* + * NAME: hfs->setcwd() + * DESCRIPTION: set the current working directory ID + */ +int hfs_setcwd(hfsvol *vol, unsigned long id) +{ + if (getvol(&vol) == -1) + goto fail; + + if (id == vol->cwd) + goto done; + + /* make sure the directory exists */ + + if (v_getdthread(vol, id, NULL, NULL) <= 0) + goto fail; + + vol->cwd = id; + +done: + return 0; + +fail: + return -1; +} + +/* + * NAME: hfs->dirinfo() + * DESCRIPTION: given a directory ID, return its (name and) parent ID + */ +int hfs_dirinfo(hfsvol *vol, unsigned long *id, char *name) +{ + CatDataRec thread; + + if (getvol(&vol) == -1 || + v_getdthread(vol, *id, &thread, NULL) <= 0) + goto fail; + + *id = thread.u.dthd.thdParID; + + if (name) + strcpy(name, thread.u.dthd.thdCName); + + return 0; + +fail: + return -1; +} + +/* + * NAME: hfs->opendir() + * DESCRIPTION: prepare to read the contents of a directory + */ +hfsdir *hfs_opendir(hfsvol *vol, const char *path) +{ + hfsdir *dir = NULL; + CatKeyRec key; + CatDataRec data; + byte pkey[HFS_CATKEYLEN]; + + if (getvol(&vol) == -1) + goto fail; + + dir = ALLOC(hfsdir, 1); + if (dir == NULL) + ERROR(ENOMEM, NULL); + + dir->vol = vol; + + if (*path == 0) + { + /* meta-directory containing root dirs from all mounted volumes */ + + dir->dirid = 0; + dir->vptr = hfs_mounts; + } + else + { + if (v_resolve(&vol, path, &data, NULL, NULL, NULL) <= 0) + goto fail; + + if (data.cdrType != cdrDirRec) + ERROR(ENOTDIR, NULL); + + dir->dirid = data.u.dir.dirDirID; + dir->vptr = NULL; + + r_makecatkey(&key, dir->dirid, ""); + r_packcatkey(&key, pkey, NULL); + + if (bt_search(&vol->cat, pkey, &dir->n) <= 0) + goto fail; + } + + dir->prev = NULL; + dir->next = vol->dirs; + + if (vol->dirs) + vol->dirs->prev = dir; + + vol->dirs = dir; + + return dir; + +fail: + FREE(dir); + return NULL; +} + +/* + * NAME: hfs->readdir() + * DESCRIPTION: return the next entry in the directory + */ +int hfs_readdir(hfsdir *dir, hfsdirent *ent) +{ + CatKeyRec key; + CatDataRec data; + const byte *ptr; + + if (dir->dirid == 0) + { + hfsvol *vol; + char cname[HFS_MAX_FLEN + 1]; + + for (vol = hfs_mounts; vol; vol = vol->next) + { + if (vol == dir->vptr) + break; + } + + if (vol == NULL) + ERROR(ENOENT, "no more entries"); + + if (v_getdthread(vol, HFS_CNID_ROOTDIR, &data, NULL) <= 0 || + v_catsearch(vol, HFS_CNID_ROOTPAR, data.u.dthd.thdCName, + &data, cname, NULL) <= 0) + goto fail; + + r_unpackdirent(HFS_CNID_ROOTPAR, cname, &data, ent); + + dir->vptr = vol->next; + + goto done; + } + + if (dir->n.rnum == -1) + ERROR(ENOENT, "no more entries"); + + while (1) + { + ++dir->n.rnum; + + while (dir->n.rnum >= dir->n.nd.ndNRecs) + { + if (dir->n.nd.ndFLink == 0) + { + dir->n.rnum = -1; + ERROR(ENOENT, "no more entries"); + } + + if (bt_getnode(&dir->n, dir->n.bt, dir->n.nd.ndFLink) == -1) + { + dir->n.rnum = -1; + goto fail; + } + + dir->n.rnum = 0; + } + + ptr = HFS_NODEREC(dir->n, dir->n.rnum); + + r_unpackcatkey(ptr, &key); + + if (key.ckrParID != dir->dirid) + { + dir->n.rnum = -1; + ERROR(ENOENT, "no more entries"); + } + + r_unpackcatdata(HFS_RECDATA(ptr), &data); + + switch (data.cdrType) + { + case cdrDirRec: + case cdrFilRec: + r_unpackdirent(key.ckrParID, key.ckrCName, &data, ent); + goto done; + + case cdrThdRec: + case cdrFThdRec: + break; + + default: + dir->n.rnum = -1; + ERROR(EIO, "unexpected directory entry found"); + } + } + +done: + return 0; + +fail: + return -1; +} + +/* + * NAME: hfs->closedir() + * DESCRIPTION: stop reading a directory + */ +int hfs_closedir(hfsdir *dir) +{ + hfsvol *vol = dir->vol; + + if (dir->prev) + dir->prev->next = dir->next; + if (dir->next) + dir->next->prev = dir->prev; + if (dir == vol->dirs) + vol->dirs = dir->next; + + FREE(dir); + + return 0; +} + +/* High-Level File Routines ================================================ */ + +/* + * NAME: hfs->open() + * DESCRIPTION: prepare a file for I/O + */ +hfsfile *hfs_open(hfsvol *vol, const char *path) +{ + hfsfile *file = NULL; + + if (getvol(&vol) == -1) + goto fail; + + file = ALLOC(hfsfile, 1); + if (file == NULL) + ERROR(ENOMEM, NULL); + + if (v_resolve(&vol, path, &file->cat, &file->parid, file->name, NULL) <= 0) + goto fail; + + if (file->cat.cdrType != cdrFilRec) + ERROR(EISDIR, NULL); + + /* package file handle for user */ + + file->vol = vol; + file->flags = 0; + + f_selectfork(file, fkData); + + file->prev = NULL; + file->next = vol->files; + + if (vol->files) + vol->files->prev = file; + + vol->files = file; + + return file; + +fail: + FREE(file); + return NULL; +} + +/* + * NAME: hfs->setfork() + * DESCRIPTION: select file fork for I/O operations + */ +int hfs_setfork(hfsfile *file, int fork) +{ + int result = 0; + + f_selectfork(file, fork ? fkRsrc : fkData); + + return result; +} + +/* + * NAME: hfs->getfork() + * DESCRIPTION: return the current fork for I/O operations + */ +int hfs_getfork(hfsfile *file) +{ + return file->fork != fkData; +} + +/* + * NAME: hfs->read() + * DESCRIPTION: read from an open file + */ +unsigned long hfs_read(hfsfile *file, void *buf, unsigned long len) +{ + unsigned long *lglen, count; + byte *ptr = buf; + + f_getptrs(file, NULL, &lglen, NULL); + + if (file->pos + len > *lglen) + len = *lglen - file->pos; + + count = len; + while (count) + { + unsigned long bnum, offs, chunk; + + bnum = file->pos >> HFS_BLOCKSZ_BITS; + offs = file->pos & (HFS_BLOCKSZ - 1); + + chunk = HFS_BLOCKSZ - offs; + if (chunk > count) + chunk = count; + + if (offs == 0 && chunk == HFS_BLOCKSZ) + { + if (f_getblock(file, bnum, (block *) ptr) == -1) + goto fail; + } + else + { + block b; + + if (f_getblock(file, bnum, &b) == -1) + goto fail; + + memcpy(ptr, b + offs, chunk); + } + + ptr += chunk; + + file->pos += chunk; + count -= chunk; + } + + return len; + +fail: + return -1; +} + +/* + * NAME: hfs->seek() + * DESCRIPTION: change file seek pointer + */ +unsigned long hfs_seek(hfsfile *file, long offset, int from) +{ + unsigned long *lglen, newpos; + + f_getptrs(file, NULL, &lglen, NULL); + + switch (from) + { + case HFS_SEEK_SET: + newpos = (offset < 0) ? 0 : offset; + break; + + case HFS_SEEK_CUR: + if (offset < 0 && (unsigned long) -offset > file->pos) + newpos = 0; + else + newpos = file->pos + offset; + break; + + case HFS_SEEK_END: + if (offset < 0 && (unsigned long) -offset > *lglen) + newpos = 0; + else + newpos = *lglen + offset; + break; + + default: + ERROR(EINVAL, NULL); + } + + if (newpos > *lglen) + newpos = *lglen; + + file->pos = newpos; + + return newpos; + +fail: + return -1; +} + +/* + * NAME: hfs->close() + * DESCRIPTION: close a file + */ +int hfs_close(hfsfile *file) +{ + hfsvol *vol = file->vol; + int result = 0; + + if (file->prev) + file->prev->next = file->next; + if (file->next) + file->next->prev = file->prev; + if (file == vol->files) + vol->files = file->next; + + FREE(file); + + return result; +} + +/* High-Level Catalog Routines ============================================= */ + +/* + * NAME: hfs->stat() + * DESCRIPTION: return catalog information for an arbitrary path + */ +int hfs_stat(hfsvol *vol, const char *path, hfsdirent *ent) +{ + CatDataRec data; + unsigned long parid; + char name[HFS_MAX_FLEN + 1]; + + if (getvol(&vol) == -1 || + v_resolve(&vol, path, &data, &parid, name, NULL) <= 0) + goto fail; + + r_unpackdirent(parid, name, &data, ent); + + return 0; + +fail: + return -1; +} + +/* + * NAME: hfs->fstat() + * DESCRIPTION: return catalog information for an open file + */ +int hfs_fstat(hfsfile *file, hfsdirent *ent) +{ + r_unpackdirent(file->parid, file->name, &file->cat, ent); + + return 0; +} + +/* + * NAME: hfs->probe() + * DESCRIPTION: return whether a HFS filesystem is present at the given offset + */ +int hfs_probe(int fd, long long offset) +{ + return v_probe(fd, offset); +} |