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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 print_and_flush(const char * __restrict format, ...)
{
va_list arg;
va_start(arg, format);
bb_vfprintf(stdout, format, arg);
va_end(arg);
bb_xfflush_stdout();
}
static void bb_xioctl(int fd, int request, void *argp, const char *string)
{
if (ioctl (fd, request, argp) < 0) {
bb_perror_msg_and_die(string);
}
}
int fdformat_main(int argc,char **argv)
{
int fd, n, cyl, read_bytes, verify;
unsigned char *data;
struct stat st;
struct floppy_struct param;
struct format_descr descr;
if (argc < 2) {
bb_show_usage();
}
verify = !bb_getopt_ulflags(argc, argv, "n");
argv += optind;
/* R_OK is needed for verifying */
if (stat(*argv,&st) < 0 || access(*argv,W_OK | R_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 */
}
/* O_RDWR for formatting and verifying */
fd = bb_xopen(*argv,O_RDWR );
bb_xioctl(fd, FDGETPRM, ¶m, "FDGETPRM");/*original message was: "Could not determine current format type" */
print_and_flush("%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 */
print_and_flush("Formatting ... ", NULL);
bb_xioctl(fd, FDFMTBEG,NULL,"FDFMTBEG");
/* n == track */
for (n = 0; n < param.track; n++)
{
descr.head = 0;
descr.track = n;
bb_xioctl(fd, FDFMTTRK,&descr,"FDFMTTRK");
print_and_flush("%3d\b\b\b", n);
if (param.head == 2) {
descr.head = 1;
bb_xioctl(fd, FDFMTTRK,&descr,"FDFMTTRK");
}
}
bb_xioctl(fd,FDFMTEND,NULL,"FDFMTEND");
print_and_flush("done\n", NULL);
/* VERIFY */
if(verify) {
/* n == cyl_size */
n = param.sect*param.head*512;
data = xmalloc(n);
print_and_flush("Verifying ... ", NULL);
for (cyl = 0; cyl < param.track; cyl++) {
print_and_flush("%3d\b\b\b", cyl);
if((read_bytes = safe_read(fd,data,n))!= n ) {
if(read_bytes < 0) {
bb_perror_msg("Read: ");
}
bb_error_msg_and_die("Problem reading cylinder %d, expected %d, read %d", cyl, n, read_bytes);
}
/* Check backwards so we don't need a counter */
while(--read_bytes>=0) {
if( data[read_bytes] != FD_FILL_BYTE) {
print_and_flush("bad data in cyl %d\nContinuing ... ",cyl);
}
}
}
/* There is no point in freeing blocks at the end of a program, because
all of the program's space is given back to the system when the process
terminates.*/
if (ENABLE_FEATURE_CLEAN_UP) free(data);
print_and_flush("done\n", NULL);
}
if (ENABLE_FEATURE_CLEAN_UP) close(fd);
/* Don't bother closing. Exit does
* that, so we can save a few bytes */
return EXIT_SUCCESS;
}
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