1 /* vi: set sw=4 ts=4: */
2 /* fdformat.c - Low-level formats a floppy disk - Werner Almesberger */
4 /* 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@pld.ORG.PL>
5 * - added Native Language Support
6 * 1999-03-20 Arnaldo Carvalho de Melo <acme@conectiva.com.br>
7 * - more i18n/nls translatable strings marked
9 * 5 July 2003 -- modified for Busybox by Erik Andersen
15 /* Stuff extracted from linux/fd.h */
16 struct floppy_struct {
17 unsigned int size, /* nr of sectors total */
18 sect, /* sectors per track */
19 head, /* nr of heads */
20 track, /* nr of tracks */
21 stretch; /* !=0 means double track steps */
23 #define FD_SWAPSIDES 2
25 unsigned char gap, /* gap1 size */
27 rate, /* data rate. |= 0x40 for perpendicular */
29 #define FD_SIZECODEMASK 0x38
30 #define FD_SIZECODE(floppy) (((((floppy)->rate&FD_SIZECODEMASK)>> 3)+ 2) %8)
31 #define FD_SECTSIZE(floppy) ( (floppy)->rate & FD_2M ? \
32 512 : 128 << FD_SIZECODE(floppy) )
35 spec1, /* stepping rate, head unload time */
36 fmt_gap; /* gap2 size */
37 const char * name; /* used only for predefined formats */
40 unsigned int device,head,track;
42 #define FDFMTBEG _IO(2,0x47)
43 #define FDFMTTRK _IOW(2,0x48, struct format_descr)
44 #define FDFMTEND _IO(2,0x49)
45 #define FDGETPRM _IOR(2, 0x04, struct floppy_struct)
46 #define FD_FILL_BYTE 0xF6 /* format fill byte. */
48 int fdformat_main(int argc,char **argv);
49 int fdformat_main(int argc,char **argv)
51 int fd, n, cyl, read_bytes, verify;
54 struct floppy_struct param;
55 struct format_descr descr;
60 verify = !getopt32(argv, "n");
64 if (!S_ISBLK(st.st_mode)) {
65 bb_error_msg_and_die("%s: not a block device", *argv);
66 /* do not test major - perhaps this was an USB floppy */
69 /* O_RDWR for formatting and verifying */
70 fd = xopen(*argv, O_RDWR);
72 /* original message was: "Could not determine current format type" */
73 xioctl(fd, FDGETPRM, ¶m);
75 printf("%s-sided, %d tracks, %d sec/track. Total capacity %d kB\n",
76 (param.head == 2) ? "Double" : "Single",
77 param.track, param.sect, param.size >> 1);
80 printf("Formatting... ");
81 xioctl(fd, FDFMTBEG, NULL);
84 for (n = 0; n < param.track; n++) {
87 xioctl(fd, FDFMTTRK, &descr);
88 printf("%3d\b\b\b", n);
89 if (param.head == 2) {
91 xioctl(fd, FDFMTTRK, &descr);
95 xioctl(fd, FDFMTEND, NULL);
101 n = param.sect*param.head*512;
104 printf("Verifying... ");
105 for (cyl = 0; cyl < param.track; cyl++) {
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) {
110 bb_perror_msg(bb_msg_read_error);
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??
116 /* Check backwards so we don't need a counter */
117 while (--read_bytes >= 0) {
118 if (data[read_bytes] != FD_FILL_BYTE) {
119 printf("bad data in cyl %d\nContinuing... ",cyl);
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
127 if (ENABLE_FEATURE_CLEAN_UP) free(data);
132 if (ENABLE_FEATURE_CLEAN_UP) close(fd);
134 /* Don't bother closing. Exit does
135 * that, so we can save a few bytes */