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162 lines
4.2 KiB
C
162 lines
4.2 KiB
C
/* fdformat.c - Low-level formats a floppy disk - Werner Almesberger */
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/* 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@pld.ORG.PL>
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* - added Native Language Support
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* 1999-03-20 Arnaldo Carvalho de Melo <acme@conectiva.com.br>
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* - more i18n/nls translatable strings marked
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*
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* 5 July 2003 -- modified for Busybox by Erik Andersen
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*/
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#include <stdio.h>
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#include <string.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include "busybox.h"
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/* Stuff extracted from linux/fd.h */
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struct floppy_struct {
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unsigned int size, /* nr of sectors total */
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sect, /* sectors per track */
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head, /* nr of heads */
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track, /* nr of tracks */
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stretch; /* !=0 means double track steps */
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#define FD_STRETCH 1
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#define FD_SWAPSIDES 2
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unsigned char gap, /* gap1 size */
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rate, /* data rate. |= 0x40 for perpendicular */
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#define FD_2M 0x4
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#define FD_SIZECODEMASK 0x38
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#define FD_SIZECODE(floppy) (((((floppy)->rate&FD_SIZECODEMASK)>> 3)+ 2) %8)
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#define FD_SECTSIZE(floppy) ( (floppy)->rate & FD_2M ? \
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512 : 128 << FD_SIZECODE(floppy) )
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#define FD_PERP 0x40
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spec1, /* stepping rate, head unload time */
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fmt_gap; /* gap2 size */
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const char * name; /* used only for predefined formats */
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};
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struct format_descr {
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unsigned int device,head,track;
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};
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#define FDFMTBEG _IO(2,0x47)
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#define FDFMTTRK _IOW(2,0x48, struct format_descr)
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#define FDFMTEND _IO(2,0x49)
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#define FDGETPRM _IOR(2, 0x04, struct floppy_struct)
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#define FD_FILL_BYTE 0xF6 /* format fill byte. */
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static void print_and_flush(const char * __restrict format, ...)
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{
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va_list arg;
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va_start(arg, format);
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bb_vfprintf(stdout, format, arg);
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va_end(arg);
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bb_xfflush_stdout();
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}
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static void bb_xioctl(int fd, int request, void *argp, const char *string)
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{
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if (ioctl (fd, request, argp) < 0) {
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bb_perror_msg_and_die(string);
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}
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}
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int fdformat_main(int argc,char **argv)
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{
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int fd, n, cyl, read_bytes, verify;
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unsigned char *data;
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struct stat st;
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struct floppy_struct param;
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struct format_descr descr;
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if (argc < 2) {
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bb_show_usage();
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}
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verify = !bb_getopt_ulflags(argc, argv, "n");
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argv += optind;
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/* R_OK is needed for verifying */
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if (stat(*argv,&st) < 0 || access(*argv,W_OK | R_OK ) < 0) {
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bb_perror_msg_and_die("%s",*argv);
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}
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if (!S_ISBLK(st.st_mode)) {
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bb_error_msg_and_die("%s: not a block device",*argv);
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/* do not test major - perhaps this was an USB floppy */
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}
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/* O_RDWR for formatting and verifying */
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fd = bb_xopen(*argv,O_RDWR );
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bb_xioctl(fd, FDGETPRM, ¶m, "FDGETPRM");/*original message was: "Could not determine current format type" */
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print_and_flush("%s-sided, %d tracks, %d sec/track. Total capacity %d kB.\n",
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(param.head == 2) ? "Double" : "Single",
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param.track, param.sect, param.size >> 1);
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/* FORMAT */
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print_and_flush("Formatting ... ", NULL);
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bb_xioctl(fd, FDFMTBEG,NULL,"FDFMTBEG");
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/* n == track */
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for (n = 0; n < param.track; n++)
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{
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descr.head = 0;
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descr.track = n;
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bb_xioctl(fd, FDFMTTRK,&descr,"FDFMTTRK");
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print_and_flush("%3d\b\b\b", n);
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if (param.head == 2) {
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descr.head = 1;
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bb_xioctl(fd, FDFMTTRK,&descr,"FDFMTTRK");
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}
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}
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bb_xioctl(fd,FDFMTEND,NULL,"FDFMTEND");
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print_and_flush("done\n", NULL);
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/* VERIFY */
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if(verify) {
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/* n == cyl_size */
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n = param.sect*param.head*512;
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data = xmalloc(n);
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print_and_flush("Verifying ... ", NULL);
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for (cyl = 0; cyl < param.track; cyl++) {
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print_and_flush("%3d\b\b\b", cyl);
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if((read_bytes = safe_read(fd,data,n))!= n ) {
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if(read_bytes < 0) {
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bb_perror_msg("Read: ");
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}
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bb_error_msg_and_die("Problem reading cylinder %d, expected %d, read %d", cyl, n, read_bytes);
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}
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/* Check backwards so we don't need a counter */
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while(--read_bytes>=0) {
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if( data[read_bytes] != FD_FILL_BYTE) {
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print_and_flush("bad data in cyl %d\nContinuing ... ",cyl);
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}
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}
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}
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/* There is no point in freeing blocks at the end of a program, because
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all of the program's space is given back to the system when the process
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terminates.*/
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if (ENABLE_FEATURE_CLEAN_UP) free(data);
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print_and_flush("done\n", NULL);
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}
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if (ENABLE_FEATURE_CLEAN_UP) close(fd);
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/* Don't bother closing. Exit does
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* that, so we can save a few bytes */
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return EXIT_SUCCESS;
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}
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