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/* util.c: misc utility functions for Atari fdisk
*
* Copyright (C) 1995-97 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
* 1996-97 Michael Schlueter <schlue00@marvin.informatik.uni-dortmund.de>
*
* 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 or
* (at your option) any later version.
*
*/
/* $Id: util.c,v 1.5 1997/07/08 18:59:06 rnhodek Exp $
*
* $Log: util.c,v $
* Revision 1.5 1997/07/08 18:59:06 rnhodek
* Ouch, too many changes without commits in between...
* Implemented moving of partitions
* Implemented checking of "extended start condition" (great changes in
* new_partition())
* Some more tests in verify()
*
* Revision 1.4 1997/06/22 10:31:00 rnhodek
* Add __attribute__((unused)) to cvid
*
* Revision 1.3 1997/06/21 20:47:51 rnhodek
* Added RCS keywords
*
* Revision 1.2 1997/06/12 13:43:39 rnhodek
* Fix many small bugs here and there. The ones you find when first running a
* program...
*
* Revision 1.1 1997/06/11 14:36:36 rnhodek
* Initial revision
*
* Revision 1.1.1.1 1997/06/11 14:36:36 rnhodek
* Started using CVS for atafdisk
*
*/
#ifndef lint
static char vcid[] __attribute__ ((unused)) =
"$Id: util.c,v 1.5 1997/07/08 18:59:06 rnhodek Exp $";
#endif /* lint */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <ctype.h>
#include "fdisk.h"
#include "util.h"
void fatal( enum failure why )
{
char error[LINE_LENGTH];
char *message = error;
if (listing) {
close(fd);
longjmp( listingbuf, 1 );
}
switch( why ) {
case usage:
message = "Usage: fdisk [-lfv] [-s /dev/hdxn] [-I sectorfile] "
"[-O sectorfile]\n"
" [-o option] [/dev/hdx]\n";
break;
case unable_to_open:
sprintf(error, "Unable to open %s\n", disk_device);
break;
case unable_to_read:
sprintf(error, "Unable to read %s\n", disk_device);
break;
case unable_to_seek:
sprintf(error, "Unable to seek on %s\n", disk_device);
break;
case unable_to_write:
sprintf(error, "Unable to write %s\n", disk_device);
break;
case out_of_memory:
message = "Unable to allocate any more memory\n";
break;
case couldnt_save_sectors:
message = "Failed saving the old sectors - aborting\n";
break;
default:
message = "Fatal error\n";
}
fputc( '\n', stderr );
fputs( message, stderr );
exit( 1 );
}
char *round_mb( unsigned long secs )
{
static char buf[20];
sprintf( buf, "%lu%s", secs/2048, (secs%2048) ? "+" : "" );
return( buf );
}
/* ------------------------------------------------------------------------ */
/* Atari specific functions */
/* translate PID to long name */
char *atari_partition_type(char *type)
{
int high = n_partition_IDs, tmp;
for(tmp = 0; tmp <= high; tmp++) {
if (PID_EQ(partition_IDs[tmp].id,type)) {
return partition_IDs[tmp].name;
}
};
return NULL;
}
int is_valid_PID( const char *id )
{
return( isalnum(id[0]) && isalnum(id[1]) && isalnum(id[2]) );
}
/* does a partition ID look like a known PID? */
int is_reasonable_PID( const char *id )
{
int i, max = n_partition_IDs;
for( i = 0; i <= max; i++) {
if (PID_EQ(partition_IDs[i].id,id))
return 1;
};
return 0;
}
int is_valid_part_entry( struct apartition *pi )
{
unsigned long end = pi->start + pi->size;
return( is_valid_PID(pi->id) &&
0 < pi->start && pi->start <= hd_size &&
0 < end && end <= hd_size &&
pi->size > 0 );
}
/* list known partition types */
void list_atari_types( void )
{
int i, size = n_partition_IDs;
printf( "\nKnown/usual partition IDs\n" );
for( i = 0; i < size; ++i ) {
printf( " %s %-15.15s\n",
partition_IDs[i].id, partition_IDs[i].name );
};
}
/* return name for boot flag */
char *atari_boot_type(unsigned char flag)
{
int j, max = n_bootflags;
for( j = 0; j < max; ++j )
if (bootflags[j].flag == (flag & ~PART_FLAG_VALID))
return( bootflags[j].name );
return( "???" );
}
/* return short name for boot flag */
char *atari_boot_type_short(unsigned char flag)
{
int j, max = n_bootflags;
static char buf[6];
for( j = 0; j < max; ++j )
if (bootflags[j].flag == (flag & ~PART_FLAG_VALID))
return( bootflags[j].short_name );
sprintf( buf, "$%02x", flag );
return( buf );
}
#define MAGIC_CHECKSUM 0x1234
int check_rootsec_checksum( char *buf )
{
signed short *p, sum;
signed short *pend = (signed short *)&buf[SECTOR_SIZE];
for( sum = 0, p = (signed short *)buf; p < pend; ++p )
sum += *p;
return( sum == MAGIC_CHECKSUM );
}
void recalc_rootsec_checksum( char *buf )
{
signed short *p, sum;
signed short *pend = (signed short *)&buf[SECTOR_SIZE-2];
for( sum = 0, p = (signed short *)buf; p < pend; ++p )
sum += *p;
*pend = MAGIC_CHECKSUM - sum;
}
/* Local Variables: */
/* tab-width: 8 */
/* End: */
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