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/* fdformat.c - Low-level formats a floppy disk - Werner Almesberger */
/* 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@pld.ORG.PL>
* - added Native Language Support
* 1999-03-20 Arnaldo Carvalho de Melo <acme@conectiva.com.br>
* - more i18n/nls translatable strings marked
*
* 5 July 2003 -- modified for Busybox by Erik Andersen
*/
#include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include <errno.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include "busybox.h"
/* Stuff extracted from linux/fd.h */
struct floppy_struct {
unsigned int size, /* nr of sectors total */
sect, /* sectors per track */
head, /* nr of heads */
track, /* nr of tracks */
stretch; /* !=0 means double track steps */
#define FD_STRETCH 1
#define FD_SWAPSIDES 2
unsigned char gap, /* gap1 size */
rate, /* data rate. |= 0x40 for perpendicular */
#define FD_2M 0x4
#define FD_SIZECODEMASK 0x38
#define FD_SIZECODE(floppy) (((((floppy)->rate&FD_SIZECODEMASK)>> 3)+ 2) %8)
#define FD_SECTSIZE(floppy) ( (floppy)->rate & FD_2M ? \
512 : 128 << FD_SIZECODE(floppy) )
#define FD_PERP 0x40
spec1, /* stepping rate, head unload time */
fmt_gap; /* gap2 size */
const char * name; /* used only for predefined formats */
};
struct format_descr {
unsigned int device,head,track;
};
#define FDFMTBEG _IO(2,0x47)
#define FDFMTTRK _IOW(2,0x48, struct format_descr)
#define FDFMTEND _IO(2,0x49)
#define FDGETPRM _IOR(2, 0x04, struct floppy_struct)
#define FD_FILL_BYTE 0xF6 /* format fill byte. */
static void format_disk(int ctrl, char *name, struct floppy_struct *param)
{
struct format_descr descr;
int track;
printf("Formatting ... ");
fflush(stdout);
if (ioctl(ctrl,FDFMTBEG,NULL) < 0) {
bb_perror_msg_and_die("FDFMTBEG");
}
for (track = 0; track < param->track; track++)
{
descr.track = track;
descr.head = 0;
if (ioctl(ctrl,FDFMTTRK,(long) &descr) < 0) {
bb_perror_msg_and_die("FDFMTTRK");
}
printf("%3d\b\b\b",track);
fflush(stdout);
if (param->head == 2) {
descr.head = 1;
if (ioctl(ctrl,FDFMTTRK,(long) &descr) < 0) {
bb_perror_msg_and_die("FDFMTTRK");
}
}
}
if (ioctl(ctrl,FDFMTEND,NULL) < 0) {
bb_perror_msg_and_die("FDFMTEND");
}
printf("done\n");
}
static void verify_disk(char *name, struct floppy_struct *param)
{
unsigned char *data;
int fd,cyl_size,cyl,count,read_bytes;
cyl_size = param->sect*param->head*512;
data = xmalloc(cyl_size);
printf("Verifying ... ");
fflush(stdout);
fd = bb_xopen(name,O_RDONLY);
for (cyl = 0; cyl < param->track; cyl++)
{
printf("%3d\b\b\b",cyl);
fflush(stdout);
read_bytes = safe_read(fd,data,cyl_size);
if(read_bytes != cyl_size) {
if(read_bytes < 0) {
bb_perror_msg("Read: ");
}
bb_error_msg_and_die("Problem reading cylinder %d, "
"expected %d, read %d", cyl, cyl_size, read_bytes);
}
for (count = 0; count < cyl_size; count++)
if (data[count] != FD_FILL_BYTE) {
printf("bad data in cyl %d\nContinuing ... ",cyl);
fflush(stdout);
break;
}
}
printf("done\n");
close(fd);
}
int fdformat_main(int argc,char **argv)
{
int ctrl;
int verify;
struct stat st;
struct floppy_struct param;
if (argc < 2) {
bb_show_usage();
}
verify != bb_getopt_ulflags(argc, argv, "n");
argv += optind;
if (stat(*argv,&st) < 0 || access(*argv,W_OK) < 0) {
bb_perror_msg_and_die(*argv);
}
if (!S_ISBLK(st.st_mode)) {
bb_error_msg_and_die("%s: not a block device",*argv);
/* do not test major - perhaps this was an USB floppy */
}
ctrl = bb_xopen(*argv,O_WRONLY);
if (ioctl(ctrl,FDGETPRM,(long) ¶m) < 0) {
bb_perror_msg_and_die("Could not determine current format type");
}
printf("%s-sided, %d tracks, %d sec/track. Total capacity %d kB.\n",
(param.head == 2) ? "Double" : "Single",
param.track, param.sect,param.size >> 1);
format_disk(ctrl, *argv, ¶m);
close(ctrl);
if (verify) {
verify_disk(*argv, ¶m);
}
return EXIT_SUCCESS;
}
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