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2c20dfb2ef5a67cb8f3ff93d9f2679e76222eac4
libcdio-osx/lib/cdda_interface/scan_devices.c
rocky 0c35a965fc More integration/cleanup. Now uses cdio bytesex.h's BE/LE routines. 
copystring -> strdup.

Some int's changed to track_t. But I need to be careful *not* to change
cdda_interface.h.
2004-12-19 01:43:38 +00:00

734 lines
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/*
$Id: scan_devices.c,v 1.2 2004/12/19 01:43:38 rocky Exp $
Copyright (C) 2004 Rocky Bernstein <rocky@panix.com>
Copyright (C) 1998 Monty xiphmont@mit.edu
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/******************************************************************
*
* Autoscan for or verify presence of a cdrom device
*
******************************************************************/
#include <limits.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <ctype.h>
#include <pwd.h>
#include <sys/stat.h>
#include <sys/types.h>
#include "low_interface.h"
#include "common_interface.h"
#include "utils.h"
#define MAX_DEV_LEN 20 /* Safe because strings only come from below */
/* must be absolute paths! */
const char *scsi_cdrom_prefixes[]={
"/dev/scd",
"/dev/sr",
NULL};
const char *scsi_generic_prefixes[]={
"/dev/sg",
NULL};
const char *devfs_scsi_test="/dev/scsi/";
const char *devfs_scsi_cd="cd";
const char *devfs_scsi_generic="generic";
const char *cdrom_devices[]={
"/dev/cdrom",
"/dev/cdroms/cdrom?",
"/dev/hd?",
"/dev/sg?",
"/dev/cdu31a",
"/dev/cdu535",
"/dev/sbpcd",
"/dev/sbpcd?",
"/dev/sonycd",
"/dev/mcd",
"/dev/sjcd",
/* "/dev/aztcd", timeout is too long */
"/dev/cm206cd",
"/dev/gscd",
"/dev/optcd",NULL};
/* Functions here look for a cdrom drive; full init of a drive type
happens in interface.c */
cdrom_drive_t *
cdda_find_a_cdrom(int messagedest, char **messages){
/* Brute force... */
int i=0;
cdrom_drive_t *d;
while(cdrom_devices[i]!=NULL){
/* is it a name or a pattern? */
char *pos;
if((pos=strchr(cdrom_devices[i],'?'))){
int j;
/* try first eight of each device */
for(j=0;j<4;j++){
char *buffer=strdup(cdrom_devices[i]);
/* number, then letter */
buffer[pos-(cdrom_devices[i])]=j+48;
if((d=cdda_identify(buffer,messagedest,messages)))
return(d);
idmessage(messagedest,messages,"",NULL);
buffer[pos-(cdrom_devices[i])]=j+97;
if((d=cdda_identify(buffer,messagedest,messages)))
return(d);
idmessage(messagedest,messages,"",NULL);
}
}else{
/* Name. Go for it. */
if((d=cdda_identify(cdrom_devices[i],messagedest,messages)))
return(d);
idmessage(messagedest,messages,"",NULL);
}
i++;
}
{
struct passwd *temp;
temp=getpwuid(geteuid());
idmessage(messagedest,messages,
"\n\nNo cdrom drives accessible to %s found.\n",
temp->pw_name);
}
return(NULL);
}
cdrom_drive_t *
cdda_identify(const char *device, int messagedest,char **messages)
{
struct stat st;
cdrom_drive_t *d=NULL;
idmessage(messagedest,messages,"Checking %s for cdrom...",device);
if(stat(device,&st)){
idperror(messagedest,messages,"\tCould not stat %s",device);
return(NULL);
}
#ifndef CDDA_TEST
if (!S_ISCHR(st.st_mode) &&
!S_ISBLK(st.st_mode)){
idmessage(messagedest,messages,"\t%s is not a block or character device",device);
return(NULL);
}
#endif
d=cdda_identify_cooked(device,messagedest,messages);
if(!d)d=cdda_identify_scsi(device,NULL,messagedest,messages);
#ifdef CDDA_TEST
if(!d)d=cdda_identify_test(device,messagedest,messages);
#endif
return(d);
}
static char *
test_resolve_symlink(const char *file,int messagedest,char **messages)
{
char resolved[PATH_MAX];
struct stat st;
if(lstat(file,&st)){
idperror(messagedest,messages,"\t\tCould not stat %s",file);
return(NULL);
}
if(realpath(file,resolved))
return(strdup(resolved));
idperror(messagedest,messages,"\t\tCould not resolve symlink %s",file);
return(NULL);
}
cdrom_drive_t *
cdda_identify_cooked(const char *dev, int messagedest,
char **messages)
{
cdrom_drive_t *d=NULL;
struct stat st;
int fd=-1;
int type;
char *description=NULL;
char *device;
idmessage(messagedest,messages,"\tTesting %s for cooked ioctl() interface",dev);
device=test_resolve_symlink(dev,messagedest,messages);
if(device==NULL)return(NULL);
if(stat(device,&st)){
idperror(messagedest,messages,"\t\tCould not stat %s",device);
free(device);
return(NULL);
}
if (!S_ISCHR(st.st_mode) &&
!S_ISBLK(st.st_mode)){
idmessage(messagedest,messages,"\t\t%s is not a block or character device",device);
free(device);
return(NULL);
}
type=(int)(st.st_rdev>>8);
switch (type) {
case IDE0_MAJOR:
case IDE1_MAJOR:
case IDE2_MAJOR:
case IDE3_MAJOR:
/* Yay, ATAPI... */
/* Ping for CDROM-ness */
fd=open(device,O_RDONLY|O_NONBLOCK);
if(fd==-1){
idperror(messagedest,messages,"\t\tUnable to open %s",device);
free(device);
return(NULL);
}
if(ioctl_ping_cdrom(fd)){
idmessage(messagedest,messages,"\t\tDevice %s is not a CDROM",device);
close(fd);
free(device);
return(NULL);
}
{
char *temp=atapi_drive_info(fd);
description=catstring(NULL,"ATAPI compatible ");
description=catstring(description,temp);
free(temp);
}
break;
case CDU31A_CDROM_MAJOR:
/* major indicates this is a cdrom; no ping necessary. */
description=strdup("Sony CDU31A or compatible");
break;
case CDU535_CDROM_MAJOR:
/* major indicates this is a cdrom; no ping necessary. */
description=strdup("Sony CDU535 or compatible");
break;
case MATSUSHITA_CDROM_MAJOR:
case MATSUSHITA_CDROM2_MAJOR:
case MATSUSHITA_CDROM3_MAJOR:
case MATSUSHITA_CDROM4_MAJOR:
/* major indicates this is a cdrom; no ping necessary. */
description=strdup("non-ATAPI IDE-style Matsushita/Panasonic CR-5xx or compatible");
break;
case SANYO_CDROM_MAJOR:
description=strdup("Sanyo proprietary or compatible: NOT CDDA CAPABLE");
break;
case MITSUMI_CDROM_MAJOR:
case MITSUMI_X_CDROM_MAJOR:
description=strdup("Mitsumi proprietary or compatible: NOT CDDA CAPABLE");
break;
case OPTICS_CDROM_MAJOR:
description=strdup("Optics Dolphin or compatible: NOT CDDA CAPABLE");
break;
case AZTECH_CDROM_MAJOR:
description=strdup("Aztech proprietary or compatible: NOT CDDA CAPABLE");
break;
case GOLDSTAR_CDROM_MAJOR:
description=strdup("Goldstar proprietary: NOT CDDA CAPABLE");
break;
case CM206_CDROM_MAJOR:
description=strdup("Philips/LMS CM206 proprietary: NOT CDDA CAPABLE");
break;
case SCSI_CDROM_MAJOR:
case SCSI_GENERIC_MAJOR:
/* Nope nope nope */
idmessage(messagedest,messages,"\t\t%s is not a cooked ioctl CDROM.",device);
free(device);
return(NULL);
default:
/* What the hell is this? */
idmessage(messagedest,messages,"\t\t%s is not a cooked ioctl CDROM.",device);
free(device);
return(NULL);
}
if(fd==-1)fd=open(device,O_RDONLY|O_NONBLOCK);
if(fd==-1){
idperror(messagedest,messages,"\t\tUnable to open %s",device);
free(device);
if(description)free(description);
return(NULL);
}
/* Minimum init */
d=calloc(1,sizeof(cdrom_drive_t));
d->cdda_device_name=device;
d->ioctl_device_name=strdup(device);
d->drive_model=description;
d->drive_type=type;
d->cdda_fd=fd;
d->ioctl_fd=fd;
d->interface=COOKED_IOCTL;
d->bigendianp=-1; /* We don't know yet... */
d->nsectors=-1;
idmessage(messagedest,messages,"\t\tCDROM sensed: %s\n",description);
return(d);
}
struct sg_id {
long l1; /* target | lun << 8 | channel << 16 | low_ino << 24 */
long l2; /* Unique id */
} sg_id;
typedef struct scsiid{
int bus;
int id;
int lun;
} scsiid;
/* Even *this* isn't as simple as it bloody well should be :-P */
/* SG has an easy interface, but SCSI overall does not */
static int get_scsi_id(int fd, scsiid *id){
struct sg_id argid;
int busarg;
/* get the host/id/lun */
if(fd==-1)return(-1);
if(ioctl(fd,SCSI_IOCTL_GET_IDLUN,&argid))return(-1);
id->bus=argid.l2; /* for now */
id->id=argid.l1&0xff;
id->lun=(argid.l1>>8)&0xff;
if(ioctl(fd,SCSI_IOCTL_GET_BUS_NUMBER,&busarg)==0)
id->bus=busarg;
return(0);
}
/* slightly wasteful, but a clean abstraction */
static char *scsi_match(const char *device, const char **prefixes,
const char *devfs_test,
const char *devfs_other,
const char *prompt,
int messagedest,char **messages)
{
int dev=open(device,O_RDONLY|O_NONBLOCK);
scsiid a,b;
int i,j;
char buffer[200];
/* if we're running under /devfs, build the device name from the
device we already have */
if(!strncmp(device,devfs_test,strlen(devfs_test))){
char *pos;
strcpy(buffer,device);
pos=strrchr(buffer,'/');
if(pos){
int matchf;
sprintf(pos,"/%s",devfs_other);
matchf=open(buffer,O_RDONLY|O_NONBLOCK);
if(matchf!=-1){
close(matchf);
close(dev);
return(strdup(buffer));
}
}
}
/* get the host/id/lun */
if(dev==-1){
idperror(messagedest,messages,"\t\tCould not access device %s",
device);
goto matchfail;
}
if(get_scsi_id(dev,&a)){
idperror(messagedest,messages,"\t\tDevice %s could not perform ioctl()",
device);
goto matchfail;
}
/* go through most likely /dev nodes for a match */
for(i=0;i<25;i++){
for(j=0;j<2;j++){
int pattern=0;
int matchf;
while(prefixes[pattern]!=NULL){
switch(j){
case 0:
/* number */
sprintf(buffer,"%s%d",prefixes[pattern],i);
break;
case 1:
/* number */
sprintf(buffer,"%s%c",prefixes[pattern],i+'a');
break;
}
matchf=open(buffer,O_RDONLY|O_NONBLOCK);
if(matchf!=-1){
if(get_scsi_id(matchf,&b)==0){
if(a.bus==b.bus && a.id==b.id && a.lun==b.lun){
close(matchf);
close(dev);
return(strdup(buffer));
}
}
close(matchf);
}
pattern++;
}
}
}
idmessage(messagedest,messages,prompt,device);
matchfail:
if(dev!=-1)close(dev);
return(NULL);
}
static void
strscat(char *a,char *b,int n)
{
int i;
for(i=n;i>0;i--)
if(b[i-1]>' ')break;
strncat(a,b,i);
strcat(a," ");
}
/* At this point, we're going to punt compatability before SG2, and
allow only SG2 and SG3 */
static int verify_SG_version(cdrom_drive_t *d,int messagedest,
char **messages){
/* are we using the new SG driver by Doug Gilbert? If not, punt */
int version,major,minor;
char buffer[256];
idmessage(messagedest,messages,
"\nFound an accessible SCSI CDROM drive."
"\nLooking at revision of the SG interface in use...","");
if(ioctl(d->cdda_fd,SG_GET_VERSION_NUM,&version)){
/* Up, guess not. */
idmessage(messagedest,messages,
"\tOOPS! Old 2.0/early 2.1/early 2.2.x (non-ac patch) style "
"SG.\n\tCdparanoia no longer supports the old interface.\n","");
return(0);
}
major=version/10000;
version-=major*10000;
minor=version/100;
version-=minor*100;
sprintf(buffer,"\tSG interface version %d.%d.%d; OK.",
major,minor,version);
idmessage(messagedest,messages,buffer,"");
return(major);
}
cdrom_drive_t *
cdda_identify_scsi(const char *generic_device,
const char *ioctl_device, int messagedest,
char **messages)
{
cdrom_drive_t *d=NULL;
struct stat i_st;
struct stat g_st;
int i_fd=-1;
int g_fd=-1;
int version;
int type=-1;
char *p;
if(generic_device)
idmessage(messagedest,messages,"\tTesting %s for SCSI interface",
generic_device);
else
if(ioctl_device)
idmessage(messagedest,messages,"\tTesting %s for SCSI interface",
ioctl_device);
/* Do this first; it's wasteful, but the messages make more sense */
if(generic_device){
if(stat(generic_device,&g_st)){
idperror(messagedest,messages,"\t\tCould not access device %s",
generic_device);
return(NULL);
}
if((int)(g_st.st_rdev>>8)!=SCSI_GENERIC_MAJOR){
if((int)(g_st.st_rdev>>8)!=SCSI_CDROM_MAJOR){
idmessage(messagedest,messages,"\t\t%s is not a SCSI device",
generic_device);
return(NULL);
}else{
char *temp=(char *)generic_device;
generic_device=ioctl_device;
ioctl_device=temp;
}
}
}
if(ioctl_device){
if(stat(ioctl_device,&i_st)){
idperror(messagedest,messages,"\t\tCould not access device %s",
ioctl_device);
return(NULL);
}
if((int)(i_st.st_rdev>>8)!=SCSI_CDROM_MAJOR){
if((int)(i_st.st_rdev>>8)!=SCSI_GENERIC_MAJOR){
idmessage(messagedest,messages,"\t\t%s is not a SCSI device",
ioctl_device);
return(NULL);
}else{
char *temp=(char *)generic_device;
generic_device=ioctl_device;
ioctl_device=temp;
}
}
}
/* we need to resolve any symlinks for the lookup code to work */
if(generic_device){
generic_device=test_resolve_symlink(generic_device,messagedest,messages);
if(generic_device==NULL)goto cdda_identify_scsi_fail;
}
if(ioctl_device){
ioctl_device=test_resolve_symlink(ioctl_device,messagedest,messages);
if(ioctl_device==NULL)goto cdda_identify_scsi_fail;
}
if(!generic_device || !ioctl_device){
if(generic_device){
ioctl_device=
scsi_match(generic_device, scsi_cdrom_prefixes,
devfs_scsi_test, devfs_scsi_cd,
"\t\tNo cdrom device found to match generic device %s",
messagedest, messages);
}else{
generic_device=
scsi_match(ioctl_device,scsi_generic_prefixes,
devfs_scsi_test,devfs_scsi_generic,
"\t\tNo generic SCSI device found to match CDROM device %s",
messagedest,messages);
if(!generic_device)
goto cdda_identify_scsi_fail;
}
}
idmessage(messagedest,messages,"\t\tgeneric device: %s",generic_device);
idmessage(messagedest,messages,"\t\tioctl device: %s",(ioctl_device?
ioctl_device:
"not found"));
if(stat(generic_device,&g_st)){
idperror(messagedest,messages,"\t\tCould not access generic SCSI device "
"%s",generic_device);
goto cdda_identify_scsi_fail;
}
if(ioctl_device)i_fd=open(ioctl_device,O_RDONLY|O_NONBLOCK);
g_fd=open(generic_device,O_RDWR);
if(ioctl_device && i_fd==-1)
idperror(messagedest,messages,"\t\tCould not open SCSI cdrom device "
"%s (continuing)",ioctl_device);
if(g_fd==-1){
idperror(messagedest,messages,"\t\tCould not open generic SCSI device "
"%s",generic_device);
goto cdda_identify_scsi_fail;
}
if(i_fd!=-1){
if(stat(ioctl_device,&i_st)){
idperror(messagedest,messages,"\t\tCould not access SCSI cdrom device "
"%s",ioctl_device);
goto cdda_identify_scsi_fail;
}
type=(int)(i_st.st_rdev>>8);
if(type==SCSI_CDROM_MAJOR){
if (!S_ISBLK(i_st.st_mode)) {
idmessage(messagedest,messages,"\t\tSCSI CDROM device %s not a "
"block device",ioctl_device);
goto cdda_identify_scsi_fail;
}
}else{
idmessage(messagedest,messages,"\t\tSCSI CDROM device %s has wrong "
"major number",ioctl_device);
goto cdda_identify_scsi_fail;
}
}
if((int)(g_st.st_rdev>>8)==SCSI_GENERIC_MAJOR){
if (!S_ISCHR(g_st.st_mode)) {
idmessage(messagedest,messages,"\t\tGeneric SCSI device %s not a "
"char device",generic_device);
goto cdda_identify_scsi_fail;
}
}else{
idmessage(messagedest,messages,"\t\tGeneric SCSI device %s has wrong "
"major number",generic_device);
goto cdda_identify_scsi_fail;
}
d=calloc(1,sizeof(cdrom_drive_t));
d->drive_type=type;
d->cdda_fd=g_fd;
d->ioctl_fd=i_fd;
d->bigendianp=-1; /* We don't know yet... */
d->nsectors=-1;
version=verify_SG_version(d,messagedest,messages);
switch(version){
case -1:case 0:case 1:
d->interface=GENERIC_SCSI;
goto cdda_identify_scsi_fail;
case 2:case 3:
d->interface=GENERIC_SCSI;
break;
}
/* malloc our big buffer for scsi commands */
d->sg=malloc(MAX_BIG_BUFF_SIZE);
d->sg_buffer=d->sg+SG_OFF;
{
/* get the lun */
scsiid lun;
if(get_scsi_id(i_fd,&lun))
d->lun=0; /* a reasonable guess on a failed ioctl */
else
d->lun=lun.lun;
}
p = scsi_inquiry(d);
/* It would seem some TOSHIBA CDROMs gets things wrong */
if (!strncmp (p + 8, "TOSHIBA", 7) &&
!strncmp (p + 16, "CD-ROM", 6) &&
p[0] == TYPE_DISK) {
p[0] = TYPE_ROM;
p[1] |= 0x80; /* removable */
}
if (!p || (*p != TYPE_ROM && *p != TYPE_WORM)) {
idmessage(messagedest,messages,
"\t\tDrive is neither a CDROM nor a WORM device\n",NULL);
free(d->sg);
free(d);
goto cdda_identify_scsi_fail;
}
d->drive_model=calloc(36,1);
memcpy(d->inqbytes,p,4);
d->cdda_device_name=strdup(generic_device);
d->ioctl_device_name=strdup(ioctl_device);
d->drive_model=calloc(36,1);
strscat(d->drive_model,p+8,8);
strscat(d->drive_model,p+16,16);
strscat(d->drive_model,p+32,4);
idmessage(messagedest,messages,"\nCDROM model sensed sensed: %s",d->drive_model);
return(d);
cdda_identify_scsi_fail:
if(generic_device)free((char *)generic_device);
if(ioctl_device)free((char *)ioctl_device);
if(i_fd!=-1)close(i_fd);
if(g_fd!=-1)close(g_fd);
return(NULL);
}
#ifdef CDDA_TEST
cdrom_drive_t *cdda_identify_test(const char *filename, int messagedest,
char **messages){
cdrom_drive_t *d=NULL;
struct stat st;
int fd=-1;
idmessage(messagedest,messages,"\tTesting %s for file/test interface",
filename);
if(stat(filename,&st)){
idperror(messagedest,messages,"\t\tCould not access file %s",
filename);
return(NULL);
}
if(!S_ISREG(st.st_mode)){
idmessage(messagedest,messages,"\t\t%s is not a regular file",
filename);
return(NULL);
}
fd=open(filename,O_RDONLY);
if(fd==-1){
idperror(messagedest,messages,"\t\tCould not open file %s",filename);
return(NULL);
}
d=calloc(1,sizeof(cdrom_drive_t));
d->cdda_device_name=strdup(filename);
d->ioctl_device_name=strdup(filename);
d->drive_type=-1;
d->cdda_fd=fd;
d->ioctl_fd=fd;
d->interface=TEST_INTERFACE;
d->bigendianp=-1; /* We don't know yet... */
d->nsectors=-1;
d->drive_model=strdup("File based test interface");
idmessage(messagedest,messages,"\t\tCDROM sensed: %s\n",d->drive_model);
return(d);
}
#endif
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