source: branches/3.2/mindi-busybox/util-linux/fdformat.c @ 3232

Last change on this file since 3232 was 3232, checked in by bruno, 5 years ago
  • Update mindi-busybox to 1.21.1
File size: 3.7 KB
RevLine 
[1765]1/* vi: set sw=4 ts=4: */
[2725]2/* fdformat.c  -  Low-level formats a floppy disk - Werner Almesberger
3 * 5 July 2003 -- modified for Busybox by Erik Andersen
[821]4 *
[2725]5 * Licensed under GPLv2, see file LICENSE in this source tree.
[821]6 */
7
[3232]8//usage:#define fdformat_trivial_usage
9//usage:       "[-n] DEVICE"
10//usage:#define fdformat_full_usage "\n\n"
11//usage:       "Format floppy disk\n"
12//usage:     "\n    -n  Don't verify after format"
13
[1765]14#include "libbb.h"
[821]15
16
17/* Stuff extracted from linux/fd.h */
18struct floppy_struct {
19    unsigned int    size,       /* nr of sectors total */
20            sect,       /* sectors per track */
21            head,       /* nr of heads */
22            track,      /* nr of tracks */
23            stretch;    /* !=0 means double track steps */
24#define FD_STRETCH 1
25#define FD_SWAPSIDES 2
26
27    unsigned char   gap,        /* gap1 size */
28
29            rate,       /* data rate. |= 0x40 for perpendicular */
30#define FD_2M 0x4
31#define FD_SIZECODEMASK 0x38
32#define FD_SIZECODE(floppy) (((((floppy)->rate&FD_SIZECODEMASK)>> 3)+ 2) %8)
33#define FD_SECTSIZE(floppy) ( (floppy)->rate & FD_2M ? \
34                 512 : 128 << FD_SIZECODE(floppy) )
35#define FD_PERP 0x40
36
37            spec1,      /* stepping rate, head unload time */
38            fmt_gap;    /* gap2 size */
39    const char  * name; /* used only for predefined formats */
40};
41struct format_descr {
42    unsigned int device,head,track;
43};
44#define FDFMTBEG _IO(2,0x47)
[2725]45#define FDFMTTRK _IOW(2,0x48, struct format_descr)
[821]46#define FDFMTEND _IO(2,0x49)
47#define FDGETPRM _IOR(2, 0x04, struct floppy_struct)
48#define FD_FILL_BYTE 0xF6 /* format fill byte. */
49
[2725]50int fdformat_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
51int fdformat_main(int argc UNUSED_PARAM, char **argv)
[821]52{
53    int fd, n, cyl, read_bytes, verify;
54    unsigned char *data;
55    struct stat st;
56    struct floppy_struct param;
57    struct format_descr descr;
58
[2725]59    opt_complementary = "=1"; /* must have 1 param */
[1765]60    verify = !getopt32(argv, "n");
[821]61    argv += optind;
62
[1765]63    xstat(*argv, &st);
[821]64    if (!S_ISBLK(st.st_mode)) {
[1765]65        bb_error_msg_and_die("%s: not a block device", *argv);
[821]66        /* do not test major - perhaps this was an USB floppy */
67    }
68
69    /* O_RDWR for formatting and verifying */
[1765]70    fd = xopen(*argv, O_RDWR);
[821]71
[1765]72    /* original message was: "Could not determine current format type" */
73    xioctl(fd, FDGETPRM, &param);
[821]74
[1765]75    printf("%s-sided, %d tracks, %d sec/track. Total capacity %d kB\n",
[821]76        (param.head == 2) ? "Double" : "Single",
77        param.track, param.sect, param.size >> 1);
78
79    /* FORMAT */
[1765]80    printf("Formatting... ");
81    xioctl(fd, FDFMTBEG, NULL);
[821]82
83    /* n == track */
[1765]84    for (n = 0; n < param.track; n++) {
85        descr.head = 0;
86        descr.track = n;
87        xioctl(fd, FDFMTTRK, &descr);
88        printf("%3d\b\b\b", n);
89        if (param.head == 2) {
90            descr.head = 1;
91            xioctl(fd, FDFMTTRK, &descr);
92        }
[821]93    }
94
[1765]95    xioctl(fd, FDFMTEND, NULL);
96    printf("done\n");
[821]97
98    /* VERIFY */
[1765]99    if (verify) {
[821]100        /* n == cyl_size */
101        n = param.sect*param.head*512;
102
103        data = xmalloc(n);
[1765]104        printf("Verifying... ");
[821]105        for (cyl = 0; cyl < param.track; cyl++) {
[1765]106            printf("%3d\b\b\b", cyl);
107            read_bytes = safe_read(fd, data, n);
108            if (read_bytes != n) {
109                if (read_bytes < 0) {
[821]110                    bb_perror_msg(bb_msg_read_error);
111                }
[1765]112                bb_error_msg_and_die("problem reading cylinder %d, "
113                    "expected %d, read %d", cyl, n, read_bytes);
114                // FIXME: maybe better seek & continue??
[821]115            }
116            /* Check backwards so we don't need a counter */
[1765]117            while (--read_bytes >= 0) {
118                if (data[read_bytes] != FD_FILL_BYTE) {
[3232]119                    printf("bad data in cyl %d\nContinuing... ", cyl);
[821]120                }
121            }
122        }
123        /* There is no point in freeing blocks at the end of a program, because
124        all of the program's space is given back to the system when the process
125        terminates.*/
126
127        if (ENABLE_FEATURE_CLEAN_UP) free(data);
128
[1765]129        printf("done\n");
[821]130    }
131
132    if (ENABLE_FEATURE_CLEAN_UP) close(fd);
133
134    /* Don't bother closing.  Exit does
135     * that, so we can save a few bytes */
136    return EXIT_SUCCESS;
137}
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