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cpmfs.c
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/* #includes */ /*{{{C}}}*//*{{{*/
#include "config.h"
#include <sys/stat.h>
#include <assert.h>
#include <ctype.h>
#include <errno.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#include "cpmdir.h"
#include "cpmfs.h"
#ifdef USE_DMALLOC
#include <dmalloc.h>
#endif
/*}}}*/
/* #defines */ /*{{{*/
#undef CPMFS_DEBUG
/* Number of _used_ bits per int */
#define INTBITS ((int)(sizeof(int)*8))
/* Convert BCD datestamp digits to binary */
#define BCD2BIN(x) ((((x)>>4)&0xf)*10 + ((x)&0xf))
#define BIN2BCD(x) (((((x)/10)&0xf)<<4) + (((x)%10)&0xf))
/* There are four reserved directory entries: ., .., [passwd] and [label].
The first two of them refer to the same inode. */
#define RESERVED_ENTRIES 4
/* CP/M does not support any kind of inodes, so they are simulated.
Inode 0-(maxdir-1) correlate to the lowest extent number (not the first
extent of the file in the directory) of a file. Inode maxdir is the
root directory, inode maxdir+1 is the optional passwd file and inode
maxdir+2 the optional disk label. */
#define RESERVED_INODES 3
#define PASSWD_RECLEN 24
/*}}}*/
extern char **environ;
const char *boo;
static mode_t s_ifdir=1;
static mode_t s_ifreg=1;
/* memcpy7 -- Copy string, leaving 8th bit alone */ /*{{{*/
static void memcpy7(char *dest, const char *src, int count)
{
while (count--)
{
*dest = ((*dest) & 0x80) | ((*src) & 0x7F);
++dest;
++src;
}
}
/*}}}*/
/* file name conversions */
/* splitFilename -- split file name into name and extension */ /*{{{*/
static int splitFilename(const char *fullname, int type, char *name, char *ext, int *user)
{
int i,j;
assert(fullname!=(const char*)0);
assert(name!=(char*)0);
assert(ext!=(char*)0);
assert(user!=(int*)0);
memset(name,' ',8);
memset(ext,' ',3);
if (!isdigit(fullname[0]) || !isdigit(fullname[1]))
{
boo="illegal CP/M filename";
return -1;
}
*user=10*(fullname[0]-'0')+(fullname[1]-'0');
fullname+=2;
if ((fullname[0]=='\0') || *user>=((type&CPMFS_HI_USER) ? 32 : 16))
{
boo="illegal CP/M filename";
return -1;
}
for (i=0; i<8 && fullname[i] && fullname[i]!='.'; ++i) if (!ISFILECHAR(i,fullname[i]))
{
boo="illegal CP/M filename";
return -1;
}
else name[i]=toupper(fullname[i]);
if (fullname[i]=='.')
{
++i;
for (j=0; j<3 && fullname[i]; ++i,++j) if (!ISFILECHAR(1,fullname[i]))
{
boo="illegal CP/M filename";
return -1;
}
else ext[j]=toupper(fullname[i]);
if (i==1 && j==0)
{
boo="illegal CP/M filename";
return -1;
}
}
return 0;
}
/*}}}*/
/* isMatching -- do two file names match? */ /*{{{*/
static int isMatching(int user1, const char *name1, const char *ext1, int user2, const char *name2, const char *ext2)
{
int i;
assert(name1!=(const char*)0);
assert(ext1!=(const char*)0);
assert(name2!=(const char*)0);
assert(ext2!=(const char*)0);
if (user1!=user2) return 0;
for (i=0; i<8; ++i) if ((name1[i]&0x7f)!=(name2[i]&0x7f)) return 0;
for (i=0; i<3; ++i) if ((ext1[i]&0x7f)!=(ext2[i]&0x7f)) return 0;
return 1;
}
/*}}}*/
/* time conversions */
/* cpm2unix_time -- convert CP/M time to UTC */ /*{{{*/
static time_t cpm2unix_time(int days, int hour, int min)
{
/* CP/M stores timestamps in local time. We don't know which */
/* timezone was used and if DST was in effect. Assuming it was */
/* the current offset from UTC is most sensible, but not perfect. */
int year,days_per_year;
static int days_per_month[]={31,0,31,30,31,30,31,31,30,31,30,31};
char **old_environ;
static char gmt0[]="TZ=GMT0";
static char *gmt_env[]={ gmt0, (char*)0 };
struct tm tms;
time_t lt,t;
time(<);
t=lt;
tms=*localtime(<);
old_environ=environ;
environ=gmt_env;
tms.tm_isdst=0;
lt=mktime(&tms);
lt-=t;
tms.tm_sec=0;
tms.tm_min=((min>>4)&0xf)*10+(min&0xf);
tms.tm_hour=((hour>>4)&0xf)*10+(hour&0xf);
tms.tm_mday=1;
tms.tm_mon=0;
tms.tm_year=78;
tms.tm_isdst=-1;
for (;;)
{
year=tms.tm_year+1900;
days_per_year=((year%4)==0 && ((year%100) || (year%400)==0)) ? 366 : 365;
if (days>days_per_year)
{
days-=days_per_year;
++tms.tm_year;
}
else break;
}
for (;;)
{
days_per_month[1]=(days_per_year==366) ? 29 : 28;
if (days>days_per_month[tms.tm_mon])
{
days-=days_per_month[tms.tm_mon];
++tms.tm_mon;
}
else break;
}
t=mktime(&tms)+(days-1)*24*3600;
environ=old_environ;
t-=lt;
return t;
}
/*}}}*/
/* unix2cpm_time -- convert UTC to CP/M time */ /*{{{*/
static void unix2cpm_time(time_t now, int *days, int *hour, int *min)
{
struct tm *tms;
int i;
tms=localtime(&now);
*min=((tms->tm_min/10)<<4)|(tms->tm_min%10);
*hour=((tms->tm_hour/10)<<4)|(tms->tm_hour%10);
for (i=1978,*days=0; i<1900+tms->tm_year; ++i)
{
*days+=365;
if (i%4==0 && (i%100!=0 || i%400==0)) ++*days;
}
*days += tms->tm_yday+1;
}
/*}}}*/
/* ds2unix_time -- convert DS to Unix time */ /*{{{*/
static time_t ds2unix_time(const struct dsEntry *entry)
{
struct tm tms;
int yr;
if (entry->minute==0 &&
entry->hour==0 &&
entry->day==0 &&
entry->month==0 &&
entry->year==0) return 0;
tms.tm_isdst = -1;
tms.tm_sec = 0;
tms.tm_min = BCD2BIN( entry->minute );
tms.tm_hour = BCD2BIN( entry->hour );
tms.tm_mday = BCD2BIN( entry->day );
tms.tm_mon = BCD2BIN( entry->month ) - 1;
yr = BCD2BIN(entry->year);
if (yr<70) yr+=100;
tms.tm_year = yr;
return mktime(&tms);
}
/*}}}*/
/* unix2ds_time -- convert Unix to DS time */ /*{{{*/
static void unix2ds_time(time_t now, struct dsEntry *entry)
{
struct tm *tms;
int yr;
if ( now==0 )
{
entry->minute=entry->hour=entry->day=entry->month=entry->year = 0;
}
else
{
tms=localtime(&now);
entry->minute = BIN2BCD( tms->tm_min );
entry->hour = BIN2BCD( tms->tm_hour );
entry->day = BIN2BCD( tms->tm_mday );
entry->month = BIN2BCD( tms->tm_mon + 1 );
yr = tms->tm_year;
if ( yr>100 ) yr -= 100;
entry->year = BIN2BCD( yr );
}
}
/*}}}*/
/* allocation vector bitmap functions */
/* alvInit -- init allocation vector */ /*{{{*/
static void alvInit(const struct cpmSuperBlock *d)
{
int i,j,offset,block;
assert(d!=(const struct cpmSuperBlock*)0);
/* clean bitmap */ /*{{{*/
memset(d->alv,0,d->alvSize*sizeof(int));
/*}}}*/
/* mark directory blocks as used */ /*{{{*/
/* A directory may cover more blocks than an int may hold bits,
* so a loop is needed.
*/
for (block=0; block<(d->maxdir*32+d->blksiz-1)/d->blksiz; ++block)
{
offset = block/INTBITS;
d->alv[offset] |= (1<<(block%INTBITS));
#ifdef CPMFS_DEBUG
fprintf(stderr,"alvInit: allocate directory block %d\n",block);
#endif
}
/*}}}*/
for (i=0; i<d->maxdir; ++i) /* mark file blocks as used */ /*{{{*/
{
if (d->dir[i].status>=0 && d->dir[i].status<=(d->type&CPMFS_HI_USER ? 31 : 15))
{
#ifdef CPMFS_DEBUG
fprintf(stderr,"alvInit: allocate extent %d\n",i);
#endif
for (j=0; j<16; ++j)
{
block=(unsigned char)d->dir[i].pointers[j];
if (d->size>=256) block+=(((unsigned char)d->dir[i].pointers[++j])<<8);
if (block && block<d->size)
{
#ifdef CPMFS_DEBUG
fprintf(stderr,"alvInit: allocate block %d\n",block);
#endif
offset=block/INTBITS;
d->alv[offset]|=(1<<block%INTBITS);
}
}
}
}
/*}}}*/
}
/*}}}*/
/* allocBlock -- allocate a new disk block */ /*{{{*/
static int allocBlock(const struct cpmSuperBlock *drive)
{
int i,j,bits,block;
assert(drive!=(const struct cpmSuperBlock*)0);
for (i=0; i<drive->alvSize; ++i)
{
for (j=0,bits=drive->alv[i]; j<INTBITS; ++j)
{
if ((bits&1)==0)
{
block=i*INTBITS+j;
if (block>=drive->size)
{
boo="device full";
return -1;
}
drive->alv[i] |= (1<<j);
return block;
}
bits >>= 1;
}
}
boo="device full";
return -1;
}
/*}}}*/
/* logical block I/O */
/* readBlock -- read a (partial) block */ /*{{{*/
static int readBlock(const struct cpmSuperBlock *d, int blockno, char *buffer, int start, int end)
{
int sect, track, counter;
assert(d);
assert(blockno>=0);
assert(buffer);
if (blockno>=d->size)
{
boo="Attempting to access block beyond end of disk";
return -1;
}
if (end<0) end=d->blksiz/d->secLength-1;
sect=(blockno*(d->blksiz/d->secLength)+ d->sectrk*d->boottrk)%d->sectrk;
track=(blockno*(d->blksiz/d->secLength)+ d->sectrk*d->boottrk)/d->sectrk;
for (counter=0; counter<=end; ++counter)
{
const char *err;
assert(d->skewtab[sect]>=0);
assert(d->skewtab[sect]<d->sectrk);
if (counter>=start && (err=Device_readSector(&d->dev,track,d->skewtab[sect],buffer+(d->secLength*counter))))
{
boo=err;
return -1;
}
++sect;
if (sect>=d->sectrk)
{
sect = 0;
++track;
}
}
return 0;
}
/*}}}*/
/* writeBlock -- write a (partial) block */ /*{{{*/
static int writeBlock(const struct cpmSuperBlock *d, int blockno, const char *buffer, int start, int end)
{
int sect, track, counter;
assert(blockno>=0);
assert(blockno<d->size);
assert(buffer!=(const char*)0);
if (end < 0) end=d->blksiz/d->secLength-1;
sect = (blockno*(d->blksiz/d->secLength))%d->sectrk;
track = (blockno*(d->blksiz/d->secLength))/d->sectrk+d->boottrk;
for (counter = 0; counter<=end; ++counter)
{
const char *err;
if (counter>=start && (err=Device_writeSector(&d->dev,track,d->skewtab[sect],buffer+(d->secLength*counter))))
{
boo=err;
return -1;
}
++sect;
if (sect>=d->sectrk)
{
sect=0;
++track;
}
}
return 0;
}
/*}}}*/
/* directory management */
/* findFileExtent -- find first/next extent for a file */ /*{{{*/
static int findFileExtent(const struct cpmSuperBlock *sb, int user, const char *name, const char *ext, int start, int extno)
{
boo="file already exists";
for (; start<sb->maxdir; ++start)
{
if
(
((unsigned char)sb->dir[start].status)<=(sb->type&CPMFS_HI_USER ? 31 : 15)
&& (extno==-1 || (EXTENT(sb->dir[start].extnol,sb->dir[start].extnoh)/sb->extents)==(extno/sb->extents))
&& isMatching(user,name,ext,sb->dir[start].status,sb->dir[start].name,sb->dir[start].ext)
) return start;
}
boo="file not found";
return -1;
}
/*}}}*/
/* findFreeExtent -- find first free extent */ /*{{{*/
static int findFreeExtent(const struct cpmSuperBlock *drive)
{
int i;
for (i=0; i<drive->maxdir; ++i) if (drive->dir[i].status==(char)0xe5) return (i);
boo="directory full";
return -1;
}
/*}}}*/
/* updateTimeStamps -- convert time stamps to CP/M format */ /*{{{*/
static void updateTimeStamps(const struct cpmInode *ino, int extent)
{
struct PhysDirectoryEntry *date;
int ca_min,ca_hour,ca_days,u_min,u_hour,u_days;
if (!S_ISREG(ino->mode)) return;
#ifdef CPMFS_DEBUG
fprintf(stderr,"CPMFS: updating time stamps for inode %d (%d)\n",extent,extent&3);
#endif
unix2cpm_time(ino->sb->cnotatime ? ino->ctime : ino->atime,&ca_days,&ca_hour,&ca_min);
unix2cpm_time(ino->mtime,&u_days,&u_hour,&u_min);
if ((ino->sb->type&CPMFS_CPM3_DATES) && (date=ino->sb->dir+(extent|3))->status==0x21)
{
ino->sb->dirtyDirectory=1;
switch (extent&3)
{
case 0: /* first entry */ /*{{{*/
{
date->name[0]=ca_days&0xff; date->name[1]=ca_days>>8;
date->name[2]=ca_hour;
date->name[3]=ca_min;
date->name[4]=u_days&0xff; date->name[5]=u_days>>8;
date->name[6]=u_hour;
date->name[7]=u_min;
break;
}
/*}}}*/
case 1: /* second entry */ /*{{{*/
{
date->ext[2]=ca_days&0xff; date->extnol=ca_days>>8;
date->lrc=ca_hour;
date->extnoh=ca_min;
date->blkcnt=u_days&0xff; date->pointers[0]=u_days>>8;
date->pointers[1]=u_hour;
date->pointers[2]=u_min;
break;
}
/*}}}*/
case 2: /* third entry */ /*{{{*/
{
date->pointers[5]=ca_days&0xff; date->pointers[6]=ca_days>>8;
date->pointers[7]=ca_hour;
date->pointers[8]=ca_min;
date->pointers[9]=u_days&0xff; date->pointers[10]=u_days>>8;
date->pointers[11]=u_hour;
date->pointers[12]=u_min;
break;
}
/*}}}*/
}
}
}
/*}}}*/
/* updateDsStamps -- set time in datestamper file */ /*{{{*/
static void updateDsStamps(const struct cpmInode *ino, int extent)
{
struct dsDate *stamp;
if (!S_ISREG(ino->mode)) return;
if ( !(ino->sb->type&CPMFS_DS_DATES) ) return;
#ifdef CPMFS_DEBUG
fprintf(stderr,"CPMFS: updating ds stamps for inode %d (%d)\n",extent,extent&3);
#endif
/* Get datestamp struct */
stamp = ino->sb->ds+extent;
unix2ds_time( ino->mtime, &stamp->modify );
unix2ds_time( ino->ctime, &stamp->create );
unix2ds_time( ino->atime, &stamp->access );
ino->sb->dirtyDs = 1;
}
/*}}}*/
/* readTimeStamps -- read CP/M time stamp */ /*{{{*/
static int readTimeStamps(struct cpmInode *i, int lowestExt)
{
/* variables */ /*{{{*/
struct PhysDirectoryEntry *date;
int u_days=0,u_hour=0,u_min=0;
int ca_days=0,ca_hour=0,ca_min=0;
int protectMode=0;
/*}}}*/
if ( (i->sb->type&CPMFS_CPM3_DATES) && (date=i->sb->dir+(lowestExt|3))->status==0x21 )
{
switch (lowestExt&3)
{
case 0: /* first entry of the four */ /*{{{*/
{
ca_days=((unsigned char)date->name[0])+(((unsigned char)date->name[1])<<8);
ca_hour=(unsigned char)date->name[2];
ca_min=(unsigned char)date->name[3];
u_days=((unsigned char)date->name[4])+(((unsigned char)date->name[5])<<8);
u_hour=(unsigned char)date->name[6];
u_min=(unsigned char)date->name[7];
protectMode=(unsigned char)date->ext[0];
break;
}
/*}}}*/
case 1: /* second entry */ /*{{{*/
{
ca_days=((unsigned char)date->ext[2])+(((unsigned char)date->extnol)<<8);
ca_hour=(unsigned char)date->lrc;
ca_min=(unsigned char)date->extnoh;
u_days=((unsigned char)date->blkcnt)+(((unsigned char)date->pointers[0])<<8);
u_hour=(unsigned char)date->pointers[1];
u_min=(unsigned char)date->pointers[2];
protectMode=(unsigned char)date->pointers[3];
break;
}
/*}}}*/
case 2: /* third one */ /*{{{*/
{
ca_days=((unsigned char)date->pointers[5])+(((unsigned char)date->pointers[6])<<8);
ca_hour=(unsigned char)date->pointers[7];
ca_min=(unsigned char)date->pointers[8];
u_days=((unsigned char)date->pointers[9])+(((unsigned char)date->pointers[10])<<8);
u_hour=(unsigned char)date->pointers[11];
u_min=(unsigned char)date->pointers[12];
protectMode=(unsigned char)date->pointers[13];
break;
}
/*}}}*/
}
if (i->sb->cnotatime)
{
i->ctime=cpm2unix_time(ca_days,ca_hour,ca_min);
i->atime=0;
}
else
{
i->ctime=0;
i->atime=cpm2unix_time(ca_days,ca_hour,ca_min);
}
i->mtime=cpm2unix_time(u_days,u_hour,u_min);
}
else
{
i->atime=i->mtime=i->ctime=0;
protectMode=0;
}
return protectMode;
}
/*}}}*/
/* readDsStamps -- read datestamper time stamp */ /*{{{*/
static void readDsStamps(struct cpmInode *i, int lowestExt)
{
struct dsDate *stamp;
if ( !(i->sb->type&CPMFS_DS_DATES) ) return;
/* Get datestamp */
stamp = i->sb->ds+lowestExt;
i->mtime = ds2unix_time(&stamp->modify);
i->ctime = ds2unix_time(&stamp->create);
i->atime = ds2unix_time(&stamp->access);
}
/*}}}*/
/* match -- match filename against a pattern */ /*{{{*/
static int recmatch(const char *a, const char *pattern)
{
int first=1;
assert(a);
assert(pattern);
while (*pattern)
{
switch (*pattern)
{
case '*':
{
if (*a=='.' && first) return 1;
++pattern;
while (*a) if (recmatch(a,pattern)) return 1; else ++a;
break;
}
case '?':
{
if (*a) { ++a; ++pattern; } else return 0;
break;
}
default: if (tolower(*a)==tolower(*pattern)) { ++a; ++pattern; } else return 0;
}
first=0;
}
return (*pattern=='\0' && *a=='\0');
}
int match(const char *a, const char *pattern)
{
int user;
char pat[255];
assert(a);
assert(pattern);
assert(strlen(pattern)<255);
if (isdigit(*pattern) && *(pattern+1)==':') { user=(*pattern-'0'); pattern+=2; }
else if (isdigit(*pattern) && isdigit(*(pattern+1)) && *(pattern+2)==':') { user=(10*(*pattern-'0')+(*(pattern+1)-'0')); pattern+=3; }
else user=-1;
if (user==-1) sprintf(pat,"??%s",pattern);
else sprintf(pat,"%02d%s",user,pattern);
return recmatch(a,pat);
}
/*}}}*/
/* cpmglob -- expand CP/M style wildcards */ /*{{{*/
void cpmglob(int optin, int argc, char * const argv[], struct cpmInode *root, int *gargc, char ***gargv)
{
struct cpmFile dir;
int entries,dirsize=0;
struct cpmDirent *dirent=(struct cpmDirent*)0;
int gargcap=0,i,j;
*gargv=(char**)0;
*gargc=0;
cpmOpendir(root,&dir);
entries=0;
dirsize=8;
dirent=malloc(sizeof(struct cpmDirent)*dirsize);
while (cpmReaddir(&dir,&dirent[entries]))
{
++entries;
if (entries==dirsize) dirent=realloc(dirent,sizeof(struct cpmDirent)*(dirsize*=2));
}
for (i=optin; i<argc; ++i)
{
int found;
for (j=0,found=0; j<entries; ++j)
{
if (match(dirent[j].name,argv[i]))
{
if (*gargc==gargcap) *gargv=realloc(*gargv,sizeof(char*)*(gargcap ? (gargcap*=2) : (gargcap=16)));
(*gargv)[*gargc]=strcpy(malloc(strlen(dirent[j].name)+1),dirent[j].name);
++*gargc;
++found;
}
}
}
free(dirent);
}
/*}}}*/
static int parseLine(struct cpmSuperBlock *d, const char *format, char *line, int ln)
{
int argc;
char *argv[2];
static int insideDef=0;
static int found = 0;
char *s;
/* Allow inline comments preceded by ; or # */
s = strchr(line, '#');
if (s) strcpy(s, "\n");
s = strchr(line, ';');
if (s) strcpy(s, "\n");
if (line[0] == '\n') return 0;
for (argc=0; argc<1 && (argv[argc]=strtok(argc ? (char*)0 : line," \t\n")); ++argc);
if ((argv[argc]=strtok((char*)0,"\n"))!=(char*)0) ++argc;
if (insideDef)
{
if (argc==1 && strcmp(argv[0],"end")==0)
{
insideDef=0;
d->size=(d->secLength*d->sectrk*(d->tracks-d->boottrk))/d->blksiz;
if (d->extents==0) d->extents=((d->size>=256 ? 8 : 16)*d->blksiz)/16384;
if (d->extents==0) d->extents=1;
if (found) return 1;
}
else if (argc==2)
{
if (strcmp(argv[0],"seclen")==0) d->secLength=strtol(argv[1],(char**)0,0);
else if (strcmp(argv[0],"tracks")==0) d->tracks=strtol(argv[1],(char**)0,0);
else if (strcmp(argv[0],"sectrk")==0) d->sectrk=strtol(argv[1],(char**)0,0);
else if (strcmp(argv[0],"blocksize")==0)
{
d->blksiz=strtol(argv[1],(char**)0,0);
if (d->blksiz <= 0)
{
fprintf(stderr,"%s: invalid blocksize `%s' in line %d\n",cmd,argv[1],ln);
exit(1);
}
}
else if (strcmp(argv[0],"maxdir")==0) d->maxdir=strtol(argv[1],(char**)0,0);
else if (strcmp(argv[0],"skew")==0) d->skew=strtol(argv[1],(char**)0,0);
else if (strcmp(argv[0],"skewtab")==0)
{
int pass,sectors;
for (pass=0; pass<2; ++pass)
{
sectors=0;
for (s=argv[1]; *s; )
{
int phys;
char *end;
phys=strtol(s,&end,10);
if (pass==1) d->skewtab[sectors]=phys;
if (end==s)
{
fprintf(stderr,"%s: invalid skewtab `%s' at `%s' in line %d\n",cmd,argv[1],s,ln);
exit(1);
}
s=end;
++sectors;
if (*s==',') ++s;
}
if (pass==0) d->skewtab=malloc(sizeof(int)*sectors);
}
}
else if (strcmp(argv[0],"boottrk")==0) d->boottrk=strtol(argv[1],(char**)0,0);
else if (strcmp(argv[0],"offset")==0)
{
off_t val;
unsigned int multiplier;
char *endptr;
errno=0;
multiplier=1;
val = strtol(argv[1],&endptr,10);
if ((errno==ERANGE && val==LONG_MAX)||(errno!=0 && val<=0))
{
fprintf(stderr,"%s: invalid offset value `%s' (%s) in line %d\n",cmd,argv[1],strerror(errno),ln);
exit(1);
}
if (endptr==argv[1])
{
fprintf(stderr,"%s: offset value `%s' is not a number in line %d\n",cmd,argv[1],ln);
exit(1);
}
if (*endptr!='\0')
{
/* Have a unit specifier */
switch (toupper(*endptr))
{
case 'K':
multiplier=1024;
break;
case 'M':
multiplier=1024*1024;
break;
case 'T':
if (d->sectrk<0||d->tracks<0||d->secLength<0)
{
fprintf(stderr,"%s: offset must be specified after sectrk, tracks and secLength in line %d\n",cmd,ln);
exit(1);
}
multiplier=d->sectrk*d->secLength;
break;
case 'S':
if (d->sectrk<0||d->tracks<0||d->secLength<0)
{
fprintf(stderr,"%s: offset must be specified after sectrk, tracks and secLength in line %d\n",cmd,ln);
exit(1);
}
multiplier=d->secLength;
break;
default:
fprintf(stderr,"%s: unknown unit specifier `%c' in line %d\n",cmd,*endptr,ln);
exit(1);
}
}
if (val*multiplier>INT_MAX)
{
fprintf(stderr,"%s: effective offset is out of range in line %d\n",cmd,ln);
exit(1);
}
d->offset=val*multiplier;
}
else if (strcmp(argv[0],"logicalextents")==0) d->extents=strtol(argv[1],(char**)0,0);
else if (strcmp(argv[0],"os")==0)
{
if (strcmp(argv[1],"2.2" )==0) d->type|=CPMFS_DR22;
else if (strcmp(argv[1],"3" )==0) d->type|=CPMFS_DR3;
else if (strcmp(argv[1],"isx" )==0) d->type|=CPMFS_ISX;
else if (strcmp(argv[1],"p2dos")==0) d->type|=CPMFS_P2DOS;
else if (strcmp(argv[1],"zsys" )==0) d->type|=CPMFS_ZSYS;
else
{
fprintf(stderr, "%s: invalid OS type `%s' in line %d\n",cmd,argv[1],ln);
exit(1);
}
}
else if (strcmp(argv[0], "libdsk:format")==0)
{
strncpy(d->libdskGeometry, argv[1], sizeof(d->libdskGeometry) - 1);
d->libdskGeometry[sizeof(d->libdskGeometry) - 1] = 0;
}
}
else if (argc>0 && argv[0][0]!='#' && argv[0][0]!=';')
{
fprintf(stderr,"%s: invalid keyword `%s' in line %d\n",cmd,argv[0],ln);
exit(1);
}
}
else if (argc > 0 && strcmp(argv[0],"diskdef")==0 &&
(argc==2 || (argc==1 && format==NULL)))
{
insideDef=1;
d->skew=1;
d->extents=0;
d->type=CPMFS_DR22;
d->skewtab=(int*)0;
d->offset=0;
d->blksiz=d->boottrk=d->secLength=d->sectrk=d->tracks=-1;
d->libdskGeometry[0] = 0;
if (format == NULL) found=1;
else if (strcmp(argv[1],format)==0) found=1;
}
return 0;
}
/* superblock management */
/* inlineReadSuper -- read super block from diskdefs string */ /*{{{*/
static int inlineReadSuper(struct cpmSuperBlock *d, const char *format)
{
int linec;
char *linev[16];
int l;
char *fmt = strdup(format);
for (linec=0; linec<15 && (linev[linec]=strtok(linec ? (char*)0 : fmt,";\n")); ++linec);
if ((linev[linec]=strtok((char*)0,";\n"))!=(char*)0) ++linec;
for (l = 0; l < linec; ++l) {
parseLine(d, NULL, linev[l], l+1);
}
return 0;
}
/* superblock management */
/* diskdefReadSuper -- read super block from diskdefs file */ /*{{{*/
static int diskdefReadSuper(struct cpmSuperBlock *d, const char *format)
{
char line[256];
int ln;
FILE *fp;
int found=0;
d->libdskGeometry[0] = '\0';
d->type=0;
if ((fp=fopen("diskdefs","r"))==(FILE*)0 && (fp=fopen(DISKDEFS,"r"))==(FILE*)0)
{
fprintf(stderr,"%s: Neither `diskdefs' nor `" DISKDEFS "' could be opened.\n",cmd);
exit(1);
}
ln=1;
while (fgets(line,sizeof(line),fp)!=(char*)0)
{
found = parseLine(d, format, line, ln);
if (found) break;
}
fclose(fp);
if (!found)
{
fprintf(stderr,"%s: unknown format %s\n",cmd,format);
exit(1);
}
if (d->boottrk<0)
{
fprintf(stderr, "%s: boottrk parameter invalid or missing from diskdef\n",cmd);
exit(1);
}
if (d->secLength<0)
{
fprintf(stderr, "%s: secLength parameter invalid or missing from diskdef\n",cmd);
exit(1);
}
if (d->sectrk<0)
{
fprintf(stderr, "%s: sectrk parameter invalid or missing from diskdef\n",cmd);
exit(1);
}
if (d->tracks<0)
{
fprintf(stderr, "%s: tracks parameter invalid or missing from diskdef\n",cmd);
exit(1);
}
if (d->blksiz<0)
{
fprintf(stderr, "%s: blocksize parameter invalid or missing from diskdef\n",cmd);
exit(1);
}
++ln;
return 0;
}
/*}}}*/
/* amsReadSuper -- read super block from amstrad disk */ /*{{{*/
static int amsReadSuper(struct cpmSuperBlock *d, const char *format)
{
unsigned char boot_sector[512], *boot_spec;
const char *err;
Device_setGeometry(&d->dev,512,9,40,0,"pcw180");
if ((err=Device_readSector(&d->dev, 0, 0, (char *)boot_sector)))
{
fprintf(stderr,"%s: Failed to read Amstrad superblock (%s)\n",cmd,err);
exit(1);
}
boot_spec=(boot_sector[0] == 0 || boot_sector[0] == 3)?boot_sector:(unsigned char*)0;
/* Check for JCE's extension to allow Amstrad and MSDOS superblocks
* in the same sector (for the PCW16)
*/
if
(
(boot_sector[0] == 0xE9 || boot_sector[0] == 0xEB)
&& !memcmp(boot_sector + 0x2B, "CP/M", 4)
&& !memcmp(boot_sector + 0x33, "DSK", 3)
&& !memcmp(boot_sector + 0x7C, "CP/M", 4)
) boot_spec = boot_sector + 128;
if (boot_spec==(unsigned char*)0)
{
fprintf(stderr,"%s: Amstrad superblock not present\n",cmd);
exit(1);
}
/* boot_spec[0] = format number: 0 for SS SD, 3 for DS DD
[1] = single/double sided and density flags
[2] = cylinders per side
[3] = sectors per cylinder
[4] = Physical sector shift, 2 => 512
[5] = Reserved track count
[6] = Block shift
[7] = No. of directory blocks
*/
d->type = 0;
d->type |= CPMFS_DR3; /* Amstrads are CP/M 3 systems */
d->secLength = 128 << boot_spec[4];
d->tracks = boot_spec[2];
if (boot_spec[1] & 3) d->tracks *= 2;
d->sectrk = boot_spec[3];
d->blksiz = 128 << boot_spec[6];
d->maxdir = (d->blksiz / 32) * boot_spec[7];
d->skew = 1; /* Amstrads skew at the controller level */
d->skewtab = (int*)0;
d->boottrk = boot_spec[5];
d->offset = 0;
d->size = (d->secLength*d->sectrk*(d->tracks-d->boottrk))/d->blksiz;
d->extents = ((d->size>=256 ? 8 : 16)*d->blksiz)/16384;
d->libdskGeometry[0] = 0; /* LibDsk can recognise an Amstrad superblock
* and autodect */
return 0;
}
/*}}}*/
/* cpmCheckDs -- read all datestamper timestamps */ /*{{{*/
int cpmCheckDs(struct cpmSuperBlock *sb)
{
int dsoffset, dsblks, dsrecs, off, i;
unsigned char *buf;
if (!isMatching(0,"!!!TIME&","DAT",sb->dir->status,sb->dir->name,sb->dir->ext)) return -1;
/* Offset to ds file in alloc blocks */
dsoffset=(sb->maxdir*32+(sb->blksiz-1))/sb->blksiz;
dsrecs=(sb->maxdir+7)/8;
dsblks=(dsrecs*128+(sb->blksiz-1))/sb->blksiz;
/* Allocate buffer */
sb->ds=malloc(dsblks*sb->blksiz);
/* Read ds file in its entirety */
off=0;
for (i=dsoffset; i<dsoffset+dsblks; i++)