1*22028508SToomas Soome /* $NetBSD: cd9660.c,v 1.5 1997/06/26 19:11:33 drochner Exp $ */
2*22028508SToomas Soome
3*22028508SToomas Soome /*
4*22028508SToomas Soome * Copyright (C) 1996 Wolfgang Solfrank.
5*22028508SToomas Soome * Copyright (C) 1996 TooLs GmbH.
6*22028508SToomas Soome * All rights reserved.
7*22028508SToomas Soome *
8*22028508SToomas Soome * Redistribution and use in source and binary forms, with or without
9*22028508SToomas Soome * modification, are permitted provided that the following conditions
10*22028508SToomas Soome * are met:
11*22028508SToomas Soome * 1. Redistributions of source code must retain the above copyright
12*22028508SToomas Soome * notice, this list of conditions and the following disclaimer.
13*22028508SToomas Soome * 2. Redistributions in binary form must reproduce the above copyright
14*22028508SToomas Soome * notice, this list of conditions and the following disclaimer in the
15*22028508SToomas Soome * documentation and/or other materials provided with the distribution.
16*22028508SToomas Soome * 3. All advertising materials mentioning features or use of this software
17*22028508SToomas Soome * must display the following acknowledgement:
18*22028508SToomas Soome * This product includes software developed by TooLs GmbH.
19*22028508SToomas Soome * 4. The name of TooLs GmbH may not be used to endorse or promote products
20*22028508SToomas Soome * derived from this software without specific prior written permission.
21*22028508SToomas Soome *
22*22028508SToomas Soome * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
23*22028508SToomas Soome * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24*22028508SToomas Soome * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25*22028508SToomas Soome * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26*22028508SToomas Soome * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
27*22028508SToomas Soome * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
28*22028508SToomas Soome * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
29*22028508SToomas Soome * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
30*22028508SToomas Soome * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
31*22028508SToomas Soome * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32*22028508SToomas Soome */
33*22028508SToomas Soome
34*22028508SToomas Soome #include <sys/cdefs.h>
35*22028508SToomas Soome
36*22028508SToomas Soome /*
37*22028508SToomas Soome * Stand-alone ISO9660 file reading package.
38*22028508SToomas Soome *
39*22028508SToomas Soome * Note: This doesn't support Rock Ridge extensions, extended attributes,
40*22028508SToomas Soome * blocksizes other than 2048 bytes, multi-extent files, etc.
41*22028508SToomas Soome */
42*22028508SToomas Soome #include <sys/param.h>
43*22028508SToomas Soome #include <string.h>
44*22028508SToomas Soome #include <stdbool.h>
45*22028508SToomas Soome #include <sys/dirent.h>
46*22028508SToomas Soome #include <fs/cd9660/iso.h>
47*22028508SToomas Soome #include <fs/cd9660/cd9660_rrip.h>
48*22028508SToomas Soome
49*22028508SToomas Soome #include "stand.h"
50*22028508SToomas Soome
51*22028508SToomas Soome #define SUSP_CONTINUATION "CE"
52*22028508SToomas Soome #define SUSP_PRESENT "SP"
53*22028508SToomas Soome #define SUSP_STOP "ST"
54*22028508SToomas Soome #define SUSP_EXTREF "ER"
55*22028508SToomas Soome #define RRIP_NAME "NM"
56*22028508SToomas Soome
57*22028508SToomas Soome typedef struct {
58*22028508SToomas Soome ISO_SUSP_HEADER h;
59*22028508SToomas Soome uchar_t signature [ISODCL(5, 6)];
60*22028508SToomas Soome uchar_t len_skp [ISODCL(7, 7)]; /* 711 */
61*22028508SToomas Soome } ISO_SUSP_PRESENT;
62*22028508SToomas Soome
63*22028508SToomas Soome static int buf_read_file(struct open_file *f, char **buf_p,
64*22028508SToomas Soome size_t *size_p);
65*22028508SToomas Soome static int cd9660_open(const char *path, struct open_file *f);
66*22028508SToomas Soome static int cd9660_close(struct open_file *f);
67*22028508SToomas Soome static int cd9660_read(struct open_file *f, void *buf, size_t size,
68*22028508SToomas Soome size_t *resid);
69*22028508SToomas Soome static off_t cd9660_seek(struct open_file *f, off_t offset, int where);
70*22028508SToomas Soome static int cd9660_stat(struct open_file *f, struct stat *sb);
71*22028508SToomas Soome static int cd9660_readdir(struct open_file *f, struct dirent *d);
72*22028508SToomas Soome static int dirmatch(struct open_file *f, const char *path,
73*22028508SToomas Soome struct iso_directory_record *dp, int use_rrip, int lenskip);
74*22028508SToomas Soome static int rrip_check(struct open_file *f, struct iso_directory_record *dp,
75*22028508SToomas Soome int *lenskip);
76*22028508SToomas Soome static char *rrip_lookup_name(struct open_file *f,
77*22028508SToomas Soome struct iso_directory_record *dp, int lenskip, size_t *len);
78*22028508SToomas Soome static ISO_SUSP_HEADER *susp_lookup_record(struct open_file *f,
79*22028508SToomas Soome const char *identifier, struct iso_directory_record *dp,
80*22028508SToomas Soome int lenskip);
81*22028508SToomas Soome
82*22028508SToomas Soome struct fs_ops cd9660_fsops = {
83*22028508SToomas Soome .fs_name = "cd9660",
84*22028508SToomas Soome .fo_open = cd9660_open,
85*22028508SToomas Soome .fo_close = cd9660_close,
86*22028508SToomas Soome .fo_read = cd9660_read,
87*22028508SToomas Soome .fo_write = null_write,
88*22028508SToomas Soome .fo_seek = cd9660_seek,
89*22028508SToomas Soome .fo_stat = cd9660_stat,
90*22028508SToomas Soome .fo_readdir = cd9660_readdir
91*22028508SToomas Soome };
92*22028508SToomas Soome
93*22028508SToomas Soome #define F_ISDIR 0x0001 /* Directory */
94*22028508SToomas Soome #define F_ROOTDIR 0x0002 /* Root directory */
95*22028508SToomas Soome #define F_RR 0x0004 /* Rock Ridge on this volume */
96*22028508SToomas Soome
97*22028508SToomas Soome struct file {
98*22028508SToomas Soome int f_flags; /* file flags */
99*22028508SToomas Soome off_t f_off; /* Current offset within file */
100*22028508SToomas Soome daddr_t f_bno; /* Starting block number */
101*22028508SToomas Soome off_t f_size; /* Size of file */
102*22028508SToomas Soome daddr_t f_buf_blkno; /* block number of data block */
103*22028508SToomas Soome char *f_buf; /* buffer for data block */
104*22028508SToomas Soome int f_susp_skip; /* len_skip for SUSP records */
105*22028508SToomas Soome };
106*22028508SToomas Soome
107*22028508SToomas Soome struct ptable_ent {
108*22028508SToomas Soome char namlen [ISODCL(1, 1)]; /* 711 */
109*22028508SToomas Soome char extlen [ISODCL(2, 2)]; /* 711 */
110*22028508SToomas Soome char block [ISODCL(3, 6)]; /* 732 */
111*22028508SToomas Soome char parent [ISODCL(7, 8)]; /* 722 */
112*22028508SToomas Soome char name [1];
113*22028508SToomas Soome };
114*22028508SToomas Soome #define PTFIXSZ 8
115*22028508SToomas Soome #define PTSIZE(pp) roundup(PTFIXSZ + isonum_711((pp)->namlen), 2)
116*22028508SToomas Soome
117*22028508SToomas Soome #define cdb2devb(bno) ((bno) * ISO_DEFAULT_BLOCK_SIZE / DEV_BSIZE)
118*22028508SToomas Soome
119*22028508SToomas Soome static ISO_SUSP_HEADER *
susp_lookup_record(struct open_file * f,const char * identifier,struct iso_directory_record * dp,int lenskip)120*22028508SToomas Soome susp_lookup_record(struct open_file *f, const char *identifier,
121*22028508SToomas Soome struct iso_directory_record *dp, int lenskip)
122*22028508SToomas Soome {
123*22028508SToomas Soome static char susp_buffer[ISO_DEFAULT_BLOCK_SIZE];
124*22028508SToomas Soome ISO_SUSP_HEADER *sh;
125*22028508SToomas Soome ISO_RRIP_CONT *shc;
126*22028508SToomas Soome char *p, *end;
127*22028508SToomas Soome int error;
128*22028508SToomas Soome size_t read;
129*22028508SToomas Soome
130*22028508SToomas Soome p = dp->name + isonum_711(dp->name_len) + lenskip;
131*22028508SToomas Soome /* Names of even length have a padding byte after the name. */
132*22028508SToomas Soome if ((isonum_711(dp->name_len) & 1) == 0)
133*22028508SToomas Soome p++;
134*22028508SToomas Soome end = (char *)dp + isonum_711(dp->length);
135*22028508SToomas Soome while (p + 3 < end) {
136*22028508SToomas Soome sh = (ISO_SUSP_HEADER *)p;
137*22028508SToomas Soome if (bcmp(sh->type, identifier, 2) == 0)
138*22028508SToomas Soome return (sh);
139*22028508SToomas Soome if (bcmp(sh->type, SUSP_STOP, 2) == 0)
140*22028508SToomas Soome return (NULL);
141*22028508SToomas Soome if (bcmp(sh->type, SUSP_CONTINUATION, 2) == 0) {
142*22028508SToomas Soome shc = (ISO_RRIP_CONT *)sh;
143*22028508SToomas Soome error = f->f_dev->dv_strategy(f->f_devdata, F_READ,
144*22028508SToomas Soome cdb2devb(isonum_733(shc->location)),
145*22028508SToomas Soome ISO_DEFAULT_BLOCK_SIZE, susp_buffer, &read);
146*22028508SToomas Soome
147*22028508SToomas Soome /* Bail if it fails. */
148*22028508SToomas Soome if (error != 0 || read != ISO_DEFAULT_BLOCK_SIZE)
149*22028508SToomas Soome return (NULL);
150*22028508SToomas Soome p = susp_buffer + isonum_733(shc->offset);
151*22028508SToomas Soome end = p + isonum_733(shc->length);
152*22028508SToomas Soome } else {
153*22028508SToomas Soome /* Ignore this record and skip to the next. */
154*22028508SToomas Soome p += isonum_711(sh->length);
155*22028508SToomas Soome
156*22028508SToomas Soome /* Avoid infinite loops with corrupted file systems */
157*22028508SToomas Soome if (isonum_711(sh->length) == 0)
158*22028508SToomas Soome return (NULL);
159*22028508SToomas Soome }
160*22028508SToomas Soome }
161*22028508SToomas Soome return (NULL);
162*22028508SToomas Soome }
163*22028508SToomas Soome
164*22028508SToomas Soome static char *
rrip_lookup_name(struct open_file * f,struct iso_directory_record * dp,int lenskip,size_t * len)165*22028508SToomas Soome rrip_lookup_name(struct open_file *f, struct iso_directory_record *dp,
166*22028508SToomas Soome int lenskip, size_t *len)
167*22028508SToomas Soome {
168*22028508SToomas Soome ISO_RRIP_ALTNAME *p;
169*22028508SToomas Soome
170*22028508SToomas Soome if (len == NULL)
171*22028508SToomas Soome return (NULL);
172*22028508SToomas Soome
173*22028508SToomas Soome p = (ISO_RRIP_ALTNAME *)susp_lookup_record(f, RRIP_NAME, dp, lenskip);
174*22028508SToomas Soome if (p == NULL)
175*22028508SToomas Soome return (NULL);
176*22028508SToomas Soome switch (*p->flags) {
177*22028508SToomas Soome case ISO_SUSP_CFLAG_CURRENT:
178*22028508SToomas Soome *len = 1;
179*22028508SToomas Soome return (".");
180*22028508SToomas Soome case ISO_SUSP_CFLAG_PARENT:
181*22028508SToomas Soome *len = 2;
182*22028508SToomas Soome return ("..");
183*22028508SToomas Soome case 0:
184*22028508SToomas Soome *len = isonum_711(p->h.length) - 5;
185*22028508SToomas Soome return ((char *)p + 5);
186*22028508SToomas Soome default:
187*22028508SToomas Soome /*
188*22028508SToomas Soome * We don't handle hostnames or continued names as they are
189*22028508SToomas Soome * too hard, so just bail and use the default name.
190*22028508SToomas Soome */
191*22028508SToomas Soome return (NULL);
192*22028508SToomas Soome }
193*22028508SToomas Soome }
194*22028508SToomas Soome
195*22028508SToomas Soome static int
rrip_check(struct open_file * f,struct iso_directory_record * dp,int * lenskip)196*22028508SToomas Soome rrip_check(struct open_file *f, struct iso_directory_record *dp, int *lenskip)
197*22028508SToomas Soome {
198*22028508SToomas Soome ISO_SUSP_PRESENT *sp;
199*22028508SToomas Soome ISO_RRIP_EXTREF *er;
200*22028508SToomas Soome char *p;
201*22028508SToomas Soome
202*22028508SToomas Soome /* First, see if we can find a SP field. */
203*22028508SToomas Soome p = dp->name + isonum_711(dp->name_len);
204*22028508SToomas Soome if (p > (char *)dp + isonum_711(dp->length))
205*22028508SToomas Soome return (0);
206*22028508SToomas Soome sp = (ISO_SUSP_PRESENT *)p;
207*22028508SToomas Soome if (bcmp(sp->h.type, SUSP_PRESENT, 2) != 0)
208*22028508SToomas Soome return (0);
209*22028508SToomas Soome if (isonum_711(sp->h.length) != sizeof (ISO_SUSP_PRESENT))
210*22028508SToomas Soome return (0);
211*22028508SToomas Soome if (sp->signature[0] != 0xbe || sp->signature[1] != 0xef)
212*22028508SToomas Soome return (0);
213*22028508SToomas Soome *lenskip = isonum_711(sp->len_skp);
214*22028508SToomas Soome
215*22028508SToomas Soome /*
216*22028508SToomas Soome * Now look for an ER field. If RRIP is present, then there must
217*22028508SToomas Soome * be at least one of these. It would be more pedantic to walk
218*22028508SToomas Soome * through the list of fields looking for a Rock Ridge ER field.
219*22028508SToomas Soome */
220*22028508SToomas Soome er = (ISO_RRIP_EXTREF *)susp_lookup_record(f, SUSP_EXTREF, dp, 0);
221*22028508SToomas Soome if (er == NULL)
222*22028508SToomas Soome return (0);
223*22028508SToomas Soome return (1);
224*22028508SToomas Soome }
225*22028508SToomas Soome
226*22028508SToomas Soome static int
dirmatch(struct open_file * f,const char * path,struct iso_directory_record * dp,int use_rrip,int lenskip)227*22028508SToomas Soome dirmatch(struct open_file *f, const char *path, struct iso_directory_record *dp,
228*22028508SToomas Soome int use_rrip, int lenskip)
229*22028508SToomas Soome {
230*22028508SToomas Soome size_t len, plen;
231*22028508SToomas Soome char *cp, *sep;
232*22028508SToomas Soome int i, icase;
233*22028508SToomas Soome
234*22028508SToomas Soome if (use_rrip)
235*22028508SToomas Soome cp = rrip_lookup_name(f, dp, lenskip, &len);
236*22028508SToomas Soome else
237*22028508SToomas Soome cp = NULL;
238*22028508SToomas Soome if (cp == NULL) {
239*22028508SToomas Soome len = isonum_711(dp->name_len);
240*22028508SToomas Soome cp = dp->name;
241*22028508SToomas Soome icase = 1;
242*22028508SToomas Soome } else
243*22028508SToomas Soome icase = 0;
244*22028508SToomas Soome
245*22028508SToomas Soome sep = strchr(path, '/');
246*22028508SToomas Soome if (sep != NULL) {
247*22028508SToomas Soome plen = sep - path;
248*22028508SToomas Soome } else {
249*22028508SToomas Soome plen = strlen(path);
250*22028508SToomas Soome }
251*22028508SToomas Soome
252*22028508SToomas Soome if (plen != len)
253*22028508SToomas Soome return (0);
254*22028508SToomas Soome
255*22028508SToomas Soome for (i = len; --i >= 0; path++, cp++) {
256*22028508SToomas Soome if (!*path || *path == '/')
257*22028508SToomas Soome break;
258*22028508SToomas Soome if (*path == *cp)
259*22028508SToomas Soome continue;
260*22028508SToomas Soome if (!icase && toupper(*path) == *cp)
261*22028508SToomas Soome continue;
262*22028508SToomas Soome return (0);
263*22028508SToomas Soome }
264*22028508SToomas Soome if (*path && *path != '/')
265*22028508SToomas Soome return (0);
266*22028508SToomas Soome
267*22028508SToomas Soome /*
268*22028508SToomas Soome * Allow stripping of trailing dots and the version number.
269*22028508SToomas Soome * Note that this will find the first instead of the last version
270*22028508SToomas Soome * of a file.
271*22028508SToomas Soome */
272*22028508SToomas Soome if (i >= 0 && (*cp == ';' || *cp == '.')) {
273*22028508SToomas Soome /* This is to prevent matching of numeric extensions */
274*22028508SToomas Soome if (*cp == '.' && cp[1] != ';')
275*22028508SToomas Soome return (0);
276*22028508SToomas Soome while (--i >= 0)
277*22028508SToomas Soome if (*++cp != ';' && (*cp < '0' || *cp > '9'))
278*22028508SToomas Soome return (0);
279*22028508SToomas Soome }
280*22028508SToomas Soome return (1);
281*22028508SToomas Soome }
282*22028508SToomas Soome
283*22028508SToomas Soome static int
cd9660_open(const char * path,struct open_file * f)284*22028508SToomas Soome cd9660_open(const char *path, struct open_file *f)
285*22028508SToomas Soome {
286*22028508SToomas Soome struct file *fp = NULL;
287*22028508SToomas Soome void *buf;
288*22028508SToomas Soome struct iso_primary_descriptor *vd;
289*22028508SToomas Soome size_t read, dsize, off;
290*22028508SToomas Soome daddr_t bno, boff;
291*22028508SToomas Soome struct iso_directory_record rec;
292*22028508SToomas Soome struct iso_directory_record *dp = NULL;
293*22028508SToomas Soome int rc, first, use_rrip, lenskip;
294*22028508SToomas Soome bool isdir = false;
295*22028508SToomas Soome
296*22028508SToomas Soome /* First find the volume descriptor */
297*22028508SToomas Soome buf = malloc(MAX(ISO_DEFAULT_BLOCK_SIZE,
298*22028508SToomas Soome sizeof (struct iso_primary_descriptor)));
299*22028508SToomas Soome vd = buf;
300*22028508SToomas Soome for (bno = 16; ; bno++) {
301*22028508SToomas Soome twiddle(1);
302*22028508SToomas Soome rc = f->f_dev->dv_strategy(f->f_devdata, F_READ, cdb2devb(bno),
303*22028508SToomas Soome ISO_DEFAULT_BLOCK_SIZE, buf, &read);
304*22028508SToomas Soome if (rc)
305*22028508SToomas Soome goto out;
306*22028508SToomas Soome if (read != ISO_DEFAULT_BLOCK_SIZE) {
307*22028508SToomas Soome rc = EIO;
308*22028508SToomas Soome goto out;
309*22028508SToomas Soome }
310*22028508SToomas Soome rc = EINVAL;
311*22028508SToomas Soome if (bcmp(vd->id, ISO_STANDARD_ID, sizeof (vd->id)) != 0)
312*22028508SToomas Soome goto out;
313*22028508SToomas Soome if (isonum_711(vd->type) == ISO_VD_END)
314*22028508SToomas Soome goto out;
315*22028508SToomas Soome if (isonum_711(vd->type) == ISO_VD_PRIMARY)
316*22028508SToomas Soome break;
317*22028508SToomas Soome }
318*22028508SToomas Soome if (isonum_723(vd->logical_block_size) != ISO_DEFAULT_BLOCK_SIZE)
319*22028508SToomas Soome goto out;
320*22028508SToomas Soome
321*22028508SToomas Soome bcopy(vd->root_directory_record, &rec, sizeof (rec));
322*22028508SToomas Soome if (*path == '/') path++; /* eat leading '/' */
323*22028508SToomas Soome
324*22028508SToomas Soome first = 1;
325*22028508SToomas Soome use_rrip = 0;
326*22028508SToomas Soome lenskip = 0;
327*22028508SToomas Soome while (*path) {
328*22028508SToomas Soome bno = isonum_733(rec.extent) + isonum_711(rec.ext_attr_length);
329*22028508SToomas Soome dsize = isonum_733(rec.size);
330*22028508SToomas Soome off = 0;
331*22028508SToomas Soome boff = 0;
332*22028508SToomas Soome
333*22028508SToomas Soome while (off < dsize) {
334*22028508SToomas Soome if ((off % ISO_DEFAULT_BLOCK_SIZE) == 0) {
335*22028508SToomas Soome twiddle(1);
336*22028508SToomas Soome rc = f->f_dev->dv_strategy(f->f_devdata, F_READ,
337*22028508SToomas Soome cdb2devb(bno + boff),
338*22028508SToomas Soome ISO_DEFAULT_BLOCK_SIZE,
339*22028508SToomas Soome buf, &read);
340*22028508SToomas Soome if (rc)
341*22028508SToomas Soome goto out;
342*22028508SToomas Soome if (read != ISO_DEFAULT_BLOCK_SIZE) {
343*22028508SToomas Soome rc = EIO;
344*22028508SToomas Soome goto out;
345*22028508SToomas Soome }
346*22028508SToomas Soome boff++;
347*22028508SToomas Soome dp = (struct iso_directory_record *)buf;
348*22028508SToomas Soome }
349*22028508SToomas Soome if (isonum_711(dp->length) == 0) {
350*22028508SToomas Soome /* skip to next block, if any */
351*22028508SToomas Soome off = boff * ISO_DEFAULT_BLOCK_SIZE;
352*22028508SToomas Soome continue;
353*22028508SToomas Soome }
354*22028508SToomas Soome
355*22028508SToomas Soome /* See if RRIP is in use. */
356*22028508SToomas Soome if (first)
357*22028508SToomas Soome use_rrip = rrip_check(f, dp, &lenskip);
358*22028508SToomas Soome
359*22028508SToomas Soome if (dirmatch(f, path, dp, use_rrip,
360*22028508SToomas Soome first ? 0 : lenskip)) {
361*22028508SToomas Soome first = 0;
362*22028508SToomas Soome break;
363*22028508SToomas Soome } else {
364*22028508SToomas Soome first = 0;
365*22028508SToomas Soome }
366*22028508SToomas Soome
367*22028508SToomas Soome dp = (struct iso_directory_record *)
368*22028508SToomas Soome ((char *)dp + isonum_711(dp->length));
369*22028508SToomas Soome /* If the new block has zero length, it is padding. */
370*22028508SToomas Soome if (isonum_711(dp->length) == 0) {
371*22028508SToomas Soome /* Skip to next block, if any. */
372*22028508SToomas Soome off = boff * ISO_DEFAULT_BLOCK_SIZE;
373*22028508SToomas Soome continue;
374*22028508SToomas Soome }
375*22028508SToomas Soome off += isonum_711(dp->length);
376*22028508SToomas Soome }
377*22028508SToomas Soome if (off >= dsize) {
378*22028508SToomas Soome rc = ENOENT;
379*22028508SToomas Soome goto out;
380*22028508SToomas Soome }
381*22028508SToomas Soome
382*22028508SToomas Soome rec = *dp;
383*22028508SToomas Soome while (*path && *path != '/') /* look for next component */
384*22028508SToomas Soome path++;
385*22028508SToomas Soome
386*22028508SToomas Soome if (*path) /* this component was directory */
387*22028508SToomas Soome isdir = true;
388*22028508SToomas Soome
389*22028508SToomas Soome while (*path == '/')
390*22028508SToomas Soome path++; /* skip '/' */
391*22028508SToomas Soome
392*22028508SToomas Soome if (*path) /* We do have next component. */
393*22028508SToomas Soome isdir = false;
394*22028508SToomas Soome }
395*22028508SToomas Soome
396*22028508SToomas Soome /*
397*22028508SToomas Soome * if the path had trailing / but the path does point to file,
398*22028508SToomas Soome * report the error ENOTDIR.
399*22028508SToomas Soome */
400*22028508SToomas Soome if (isdir == true && (isonum_711(rec.flags) & 2) == 0) {
401*22028508SToomas Soome rc = ENOTDIR;
402*22028508SToomas Soome goto out;
403*22028508SToomas Soome }
404*22028508SToomas Soome
405*22028508SToomas Soome /* allocate file system specific data structure */
406*22028508SToomas Soome fp = malloc(sizeof (struct file));
407*22028508SToomas Soome bzero(fp, sizeof (struct file));
408*22028508SToomas Soome f->f_fsdata = (void *)fp;
409*22028508SToomas Soome
410*22028508SToomas Soome if ((isonum_711(rec.flags) & 2) != 0) {
411*22028508SToomas Soome fp->f_flags = F_ISDIR;
412*22028508SToomas Soome }
413*22028508SToomas Soome if (first) {
414*22028508SToomas Soome fp->f_flags |= F_ROOTDIR;
415*22028508SToomas Soome
416*22028508SToomas Soome /* Check for Rock Ridge since we didn't in the loop above. */
417*22028508SToomas Soome bno = isonum_733(rec.extent) + isonum_711(rec.ext_attr_length);
418*22028508SToomas Soome twiddle(1);
419*22028508SToomas Soome rc = f->f_dev->dv_strategy(f->f_devdata, F_READ, cdb2devb(bno),
420*22028508SToomas Soome ISO_DEFAULT_BLOCK_SIZE, buf, &read);
421*22028508SToomas Soome if (rc)
422*22028508SToomas Soome goto out;
423*22028508SToomas Soome if (read != ISO_DEFAULT_BLOCK_SIZE) {
424*22028508SToomas Soome rc = EIO;
425*22028508SToomas Soome goto out;
426*22028508SToomas Soome }
427*22028508SToomas Soome dp = (struct iso_directory_record *)buf;
428*22028508SToomas Soome use_rrip = rrip_check(f, dp, &lenskip);
429*22028508SToomas Soome }
430*22028508SToomas Soome if (use_rrip) {
431*22028508SToomas Soome fp->f_flags |= F_RR;
432*22028508SToomas Soome fp->f_susp_skip = lenskip;
433*22028508SToomas Soome }
434*22028508SToomas Soome fp->f_off = 0;
435*22028508SToomas Soome fp->f_bno = isonum_733(rec.extent) + isonum_711(rec.ext_attr_length);
436*22028508SToomas Soome fp->f_size = isonum_733(rec.size);
437*22028508SToomas Soome free(buf);
438*22028508SToomas Soome
439*22028508SToomas Soome return (0);
440*22028508SToomas Soome
441*22028508SToomas Soome out:
442*22028508SToomas Soome free(fp);
443*22028508SToomas Soome free(buf);
444*22028508SToomas Soome
445*22028508SToomas Soome return (rc);
446*22028508SToomas Soome }
447*22028508SToomas Soome
448*22028508SToomas Soome static int
cd9660_close(struct open_file * f)449*22028508SToomas Soome cd9660_close(struct open_file *f)
450*22028508SToomas Soome {
451*22028508SToomas Soome struct file *fp = (struct file *)f->f_fsdata;
452*22028508SToomas Soome
453*22028508SToomas Soome f->f_fsdata = NULL;
454*22028508SToomas Soome free(fp);
455*22028508SToomas Soome
456*22028508SToomas Soome return (0);
457*22028508SToomas Soome }
458*22028508SToomas Soome
459*22028508SToomas Soome static int
buf_read_file(struct open_file * f,char ** buf_p,size_t * size_p)460*22028508SToomas Soome buf_read_file(struct open_file *f, char **buf_p, size_t *size_p)
461*22028508SToomas Soome {
462*22028508SToomas Soome struct file *fp = (struct file *)f->f_fsdata;
463*22028508SToomas Soome daddr_t blkno, blkoff;
464*22028508SToomas Soome int rc = 0;
465*22028508SToomas Soome size_t read;
466*22028508SToomas Soome
467*22028508SToomas Soome blkno = fp->f_off / ISO_DEFAULT_BLOCK_SIZE + fp->f_bno;
468*22028508SToomas Soome blkoff = fp->f_off % ISO_DEFAULT_BLOCK_SIZE;
469*22028508SToomas Soome
470*22028508SToomas Soome if (blkno != fp->f_buf_blkno) {
471*22028508SToomas Soome if (fp->f_buf == (char *)0)
472*22028508SToomas Soome fp->f_buf = malloc(ISO_DEFAULT_BLOCK_SIZE);
473*22028508SToomas Soome
474*22028508SToomas Soome twiddle(16);
475*22028508SToomas Soome rc = f->f_dev->dv_strategy(f->f_devdata, F_READ,
476*22028508SToomas Soome cdb2devb(blkno), ISO_DEFAULT_BLOCK_SIZE,
477*22028508SToomas Soome fp->f_buf, &read);
478*22028508SToomas Soome if (rc)
479*22028508SToomas Soome return (rc);
480*22028508SToomas Soome if (read != ISO_DEFAULT_BLOCK_SIZE)
481*22028508SToomas Soome return (EIO);
482*22028508SToomas Soome
483*22028508SToomas Soome fp->f_buf_blkno = blkno;
484*22028508SToomas Soome }
485*22028508SToomas Soome
486*22028508SToomas Soome *buf_p = fp->f_buf + blkoff;
487*22028508SToomas Soome *size_p = ISO_DEFAULT_BLOCK_SIZE - blkoff;
488*22028508SToomas Soome
489*22028508SToomas Soome if (*size_p > fp->f_size - fp->f_off)
490*22028508SToomas Soome *size_p = fp->f_size - fp->f_off;
491*22028508SToomas Soome return (rc);
492*22028508SToomas Soome }
493*22028508SToomas Soome
494*22028508SToomas Soome static int
cd9660_read(struct open_file * f,void * start,size_t size,size_t * resid)495*22028508SToomas Soome cd9660_read(struct open_file *f, void *start, size_t size, size_t *resid)
496*22028508SToomas Soome {
497*22028508SToomas Soome struct file *fp = (struct file *)f->f_fsdata;
498*22028508SToomas Soome char *buf, *addr;
499*22028508SToomas Soome size_t buf_size, csize;
500*22028508SToomas Soome int rc = 0;
501*22028508SToomas Soome
502*22028508SToomas Soome addr = start;
503*22028508SToomas Soome while (size) {
504*22028508SToomas Soome if (fp->f_off < 0 || fp->f_off >= fp->f_size)
505*22028508SToomas Soome break;
506*22028508SToomas Soome
507*22028508SToomas Soome rc = buf_read_file(f, &buf, &buf_size);
508*22028508SToomas Soome if (rc)
509*22028508SToomas Soome break;
510*22028508SToomas Soome
511*22028508SToomas Soome csize = size > buf_size ? buf_size : size;
512*22028508SToomas Soome bcopy(buf, addr, csize);
513*22028508SToomas Soome
514*22028508SToomas Soome fp->f_off += csize;
515*22028508SToomas Soome addr += csize;
516*22028508SToomas Soome size -= csize;
517*22028508SToomas Soome }
518*22028508SToomas Soome if (resid)
519*22028508SToomas Soome *resid = size;
520*22028508SToomas Soome return (rc);
521*22028508SToomas Soome }
522*22028508SToomas Soome
523*22028508SToomas Soome static int
cd9660_readdir(struct open_file * f,struct dirent * d)524*22028508SToomas Soome cd9660_readdir(struct open_file *f, struct dirent *d)
525*22028508SToomas Soome {
526*22028508SToomas Soome struct file *fp = (struct file *)f->f_fsdata;
527*22028508SToomas Soome struct iso_directory_record *ep;
528*22028508SToomas Soome size_t buf_size, reclen, namelen;
529*22028508SToomas Soome int error = 0;
530*22028508SToomas Soome int lenskip;
531*22028508SToomas Soome char *buf, *name;
532*22028508SToomas Soome
533*22028508SToomas Soome again:
534*22028508SToomas Soome if (fp->f_off >= fp->f_size)
535*22028508SToomas Soome return (ENOENT);
536*22028508SToomas Soome error = buf_read_file(f, &buf, &buf_size);
537*22028508SToomas Soome if (error)
538*22028508SToomas Soome return (error);
539*22028508SToomas Soome ep = (struct iso_directory_record *)buf;
540*22028508SToomas Soome
541*22028508SToomas Soome if (isonum_711(ep->length) == 0) {
542*22028508SToomas Soome daddr_t blkno;
543*22028508SToomas Soome
544*22028508SToomas Soome /* skip to next block, if any */
545*22028508SToomas Soome blkno = fp->f_off / ISO_DEFAULT_BLOCK_SIZE;
546*22028508SToomas Soome fp->f_off = (blkno + 1) * ISO_DEFAULT_BLOCK_SIZE;
547*22028508SToomas Soome goto again;
548*22028508SToomas Soome }
549*22028508SToomas Soome
550*22028508SToomas Soome if (fp->f_flags & F_RR) {
551*22028508SToomas Soome if (fp->f_flags & F_ROOTDIR && fp->f_off == 0)
552*22028508SToomas Soome lenskip = 0;
553*22028508SToomas Soome else
554*22028508SToomas Soome lenskip = fp->f_susp_skip;
555*22028508SToomas Soome name = rrip_lookup_name(f, ep, lenskip, &namelen);
556*22028508SToomas Soome } else
557*22028508SToomas Soome name = NULL;
558*22028508SToomas Soome if (name == NULL) {
559*22028508SToomas Soome namelen = isonum_711(ep->name_len);
560*22028508SToomas Soome name = ep->name;
561*22028508SToomas Soome if (namelen == 1) {
562*22028508SToomas Soome if (ep->name[0] == 0)
563*22028508SToomas Soome name = ".";
564*22028508SToomas Soome else if (ep->name[0] == 1) {
565*22028508SToomas Soome namelen = 2;
566*22028508SToomas Soome name = "..";
567*22028508SToomas Soome }
568*22028508SToomas Soome }
569*22028508SToomas Soome }
570*22028508SToomas Soome reclen = sizeof (struct dirent) - (MAXNAMLEN+1) + namelen + 1;
571*22028508SToomas Soome reclen = (reclen + 3) & ~3;
572*22028508SToomas Soome
573*22028508SToomas Soome d->d_fileno = isonum_733(ep->extent);
574*22028508SToomas Soome d->d_reclen = reclen;
575*22028508SToomas Soome if (isonum_711(ep->flags) & 2)
576*22028508SToomas Soome d->d_type = DT_DIR;
577*22028508SToomas Soome else
578*22028508SToomas Soome d->d_type = DT_REG;
579*22028508SToomas Soome d->d_namlen = namelen;
580*22028508SToomas Soome
581*22028508SToomas Soome bcopy(name, d->d_name, d->d_namlen);
582*22028508SToomas Soome d->d_name[d->d_namlen] = 0;
583*22028508SToomas Soome
584*22028508SToomas Soome fp->f_off += isonum_711(ep->length);
585*22028508SToomas Soome return (0);
586*22028508SToomas Soome }
587*22028508SToomas Soome
588*22028508SToomas Soome static off_t
cd9660_seek(struct open_file * f,off_t offset,int where)589*22028508SToomas Soome cd9660_seek(struct open_file *f, off_t offset, int where)
590*22028508SToomas Soome {
591*22028508SToomas Soome struct file *fp = (struct file *)f->f_fsdata;
592*22028508SToomas Soome
593*22028508SToomas Soome switch (where) {
594*22028508SToomas Soome case SEEK_SET:
595*22028508SToomas Soome fp->f_off = offset;
596*22028508SToomas Soome break;
597*22028508SToomas Soome case SEEK_CUR:
598*22028508SToomas Soome fp->f_off += offset;
599*22028508SToomas Soome break;
600*22028508SToomas Soome case SEEK_END:
601*22028508SToomas Soome fp->f_off = fp->f_size - offset;
602*22028508SToomas Soome break;
603*22028508SToomas Soome default:
604*22028508SToomas Soome return (-1);
605*22028508SToomas Soome }
606*22028508SToomas Soome return (fp->f_off);
607*22028508SToomas Soome }
608*22028508SToomas Soome
609*22028508SToomas Soome static int
cd9660_stat(struct open_file * f,struct stat * sb)610*22028508SToomas Soome cd9660_stat(struct open_file *f, struct stat *sb)
611*22028508SToomas Soome {
612*22028508SToomas Soome struct file *fp = (struct file *)f->f_fsdata;
613*22028508SToomas Soome
614*22028508SToomas Soome /* only important stuff */
615*22028508SToomas Soome sb->st_mode = S_IRUSR | S_IRGRP | S_IROTH;
616*22028508SToomas Soome if (fp->f_flags & F_ISDIR)
617*22028508SToomas Soome sb->st_mode |= S_IFDIR;
618*22028508SToomas Soome else
619*22028508SToomas Soome sb->st_mode |= S_IFREG;
620*22028508SToomas Soome sb->st_uid = sb->st_gid = 0;
621*22028508SToomas Soome sb->st_size = fp->f_size;
622*22028508SToomas Soome return (0);
623*22028508SToomas Soome }
624