mirror of
https://github.com/sheumann/hush.git
synced 2024-11-19 08:31:11 +00:00
138 lines
3.7 KiB
C
138 lines
3.7 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/* fdformat.c - Low-level formats a floppy disk - Werner Almesberger
|
|
* 5 July 2003 -- modified for Busybox by Erik Andersen
|
|
*
|
|
* Licensed under GPLv2, see file LICENSE in this source tree.
|
|
*/
|
|
|
|
//usage:#define fdformat_trivial_usage
|
|
//usage: "[-n] DEVICE"
|
|
//usage:#define fdformat_full_usage "\n\n"
|
|
//usage: "Format floppy disk\n"
|
|
//usage: "\n -n Don't verify after format"
|
|
|
|
#include "libbb.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. */
|
|
|
|
int fdformat_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
|
int fdformat_main(int argc UNUSED_PARAM, char **argv)
|
|
{
|
|
int fd, n, cyl, read_bytes, verify;
|
|
unsigned char *data;
|
|
struct stat st;
|
|
struct floppy_struct param;
|
|
struct format_descr descr;
|
|
|
|
opt_complementary = "=1"; /* must have 1 param */
|
|
verify = !getopt32(argv, "n");
|
|
argv += optind;
|
|
|
|
xstat(*argv, &st);
|
|
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 = xopen(*argv, O_RDWR);
|
|
|
|
/* original message was: "Could not determine current format type" */
|
|
xioctl(fd, FDGETPRM, ¶m);
|
|
|
|
printf("%s-sided, %u tracks, %u sec/track. Total capacity %d kB\n",
|
|
(param.head == 2) ? "Double" : "Single",
|
|
param.track, param.sect, param.size >> 1);
|
|
|
|
/* FORMAT */
|
|
printf("Formatting... ");
|
|
xioctl(fd, FDFMTBEG, NULL);
|
|
|
|
/* n == track */
|
|
for (n = 0; n < param.track; n++) {
|
|
descr.head = 0;
|
|
descr.track = n;
|
|
xioctl(fd, FDFMTTRK, &descr);
|
|
printf("%3d\b\b\b", n);
|
|
if (param.head == 2) {
|
|
descr.head = 1;
|
|
xioctl(fd, FDFMTTRK, &descr);
|
|
}
|
|
}
|
|
|
|
xioctl(fd, FDFMTEND, NULL);
|
|
printf("done\n");
|
|
|
|
/* VERIFY */
|
|
if (verify) {
|
|
/* n == cyl_size */
|
|
n = param.sect*param.head*512;
|
|
|
|
data = xmalloc(n);
|
|
printf("Verifying... ");
|
|
for (cyl = 0; cyl < param.track; cyl++) {
|
|
printf("%3d\b\b\b", cyl);
|
|
read_bytes = safe_read(fd, data, n);
|
|
if (read_bytes != n) {
|
|
if (read_bytes < 0) {
|
|
bb_perror_msg(bb_msg_read_error);
|
|
}
|
|
bb_error_msg_and_die("problem reading cylinder %d, "
|
|
"expected %d, read %d", cyl, n, read_bytes);
|
|
// FIXME: maybe better seek & continue??
|
|
}
|
|
/* Check backwards so we don't need a counter */
|
|
while (--read_bytes >= 0) {
|
|
if (data[read_bytes] != FD_FILL_BYTE) {
|
|
printf("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);
|
|
|
|
printf("done\n");
|
|
}
|
|
|
|
if (ENABLE_FEATURE_CLEAN_UP) close(fd);
|
|
|
|
/* Don't bother closing. Exit does
|
|
* that, so we can save a few bytes */
|
|
return EXIT_SUCCESS;
|
|
}
|