| /* vi: set sw=4 ts=4: */ |
| /* 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 "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 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 = !getopt32(argc, 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, "FDGETPRM"); |
| |
| 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 */ |
| printf("Formatting... "); |
| xioctl(fd, FDFMTBEG, NULL, "FDFMTBEG"); |
| |
| /* n == track */ |
| for (n = 0; n < param.track; n++) { |
| descr.head = 0; |
| descr.track = n; |
| xioctl(fd, FDFMTTRK, &descr, "FDFMTTRK"); |
| printf("%3d\b\b\b", n); |
| if (param.head == 2) { |
| descr.head = 1; |
| xioctl(fd, FDFMTTRK, &descr, "FDFMTTRK"); |
| } |
| } |
| |
| xioctl(fd, FDFMTEND, NULL, "FDFMTEND"); |
| 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; |
| } |