busybox/util-linux/fdformat.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 tarball for details.
 */

#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, &param);

	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);

	/* 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;
}
1	/* vi: set sw=4 ts=4: */
2	/* fdformat.c - Low-level formats a floppy disk - Werner Almesberger
3	* 5 July 2003 -- modified for Busybox by Erik Andersen
4	*
5	* Licensed under GPLv2, see file LICENSE in this tarball for details.
6	*/
7
8	#include "libbb.h"
9
10
11	/* Stuff extracted from linux/fd.h */
12	struct floppy_struct {
13	unsigned int size, /* nr of sectors total */
14	sect, /* sectors per track */
15	head, /* nr of heads */
16	track, /* nr of tracks */
17	stretch; /* !=0 means double track steps */
18	#define FD_STRETCH 1
19	#define FD_SWAPSIDES 2
20
21	unsigned char gap, /* gap1 size */
22
23	rate, /* data rate. \|= 0x40 for perpendicular */
24	#define FD_2M 0x4
25	#define FD_SIZECODEMASK 0x38
26	#define FD_SIZECODE(floppy) (((((floppy)->rate&FD_SIZECODEMASK)>> 3)+ 2) %8)
27	#define FD_SECTSIZE(floppy) ( (floppy)->rate & FD_2M ? \
28	512 : 128 << FD_SIZECODE(floppy) )
29	#define FD_PERP 0x40
30
31	spec1, /* stepping rate, head unload time */
32	fmt_gap; /* gap2 size */
33	const char * name; /* used only for predefined formats */
34	};
35	struct format_descr {
36	unsigned int device,head,track;
37	};
38	#define FDFMTBEG _IO(2,0x47)
39	#define FDFMTTRK _IOW(2,0x48, struct format_descr)
40	#define FDFMTEND _IO(2,0x49)
41	#define FDGETPRM _IOR(2, 0x04, struct floppy_struct)
42	#define FD_FILL_BYTE 0xF6 /* format fill byte. */
43
44	int fdformat_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
45	int fdformat_main(int argc UNUSED_PARAM, char **argv)
46	{
47	int fd, n, cyl, read_bytes, verify;
48	unsigned char *data;
49	struct stat st;
50	struct floppy_struct param;
51	struct format_descr descr;
52
53	opt_complementary = "=1"; /* must have 1 param */
54	verify = !getopt32(argv, "n");
55	argv += optind;
56
57	xstat(*argv, &st);
58	if (!S_ISBLK(st.st_mode)) {
59	bb_error_msg_and_die("%s: not a block device", *argv);
60	/* do not test major - perhaps this was an USB floppy */
61	}
62
63	/* O_RDWR for formatting and verifying */
64	fd = xopen(*argv, O_RDWR);
65
66	/* original message was: "Could not determine current format type" */
67	xioctl(fd, FDGETPRM, &param);
68
69	printf("%s-sided, %d tracks, %d sec/track. Total capacity %d kB\n",
70	(param.head == 2) ? "Double" : "Single",
71	param.track, param.sect, param.size >> 1);
72
73	/* FORMAT */
74	printf("Formatting... ");
75	xioctl(fd, FDFMTBEG, NULL);
76
77	/* n == track */
78	for (n = 0; n < param.track; n++) {
79	descr.head = 0;
80	descr.track = n;
81	xioctl(fd, FDFMTTRK, &descr);
82	printf("%3d\b\b\b", n);
83	if (param.head == 2) {
84	descr.head = 1;
85	xioctl(fd, FDFMTTRK, &descr);
86	}
87	}
88
89	xioctl(fd, FDFMTEND, NULL);
90	printf("done\n");
91
92	/* VERIFY */
93	if (verify) {
94	/* n == cyl_size */
95	n = param.sectparam.head512;
96
97	data = xmalloc(n);
98	printf("Verifying... ");
99	for (cyl = 0; cyl < param.track; cyl++) {
100	printf("%3d\b\b\b", cyl);
101	read_bytes = safe_read(fd, data, n);
102	if (read_bytes != n) {
103	if (read_bytes < 0) {
104	bb_perror_msg(bb_msg_read_error);
105	}
106	bb_error_msg_and_die("problem reading cylinder %d, "
107	"expected %d, read %d", cyl, n, read_bytes);
108	// FIXME: maybe better seek & continue??
109	}
110	/* Check backwards so we don't need a counter */
111	while (--read_bytes >= 0) {
112	if (data[read_bytes] != FD_FILL_BYTE) {
113	printf("bad data in cyl %d\nContinuing... ", cyl);
114	}
115	}
116	}
117	/* There is no point in freeing blocks at the end of a program, because
118	all of the program's space is given back to the system when the process
119	terminates.*/
120
121	if (ENABLE_FEATURE_CLEAN_UP) free(data);
122
123	printf("done\n");
124	}
125
126	if (ENABLE_FEATURE_CLEAN_UP) close(fd);
127
128	/* Don't bother closing. Exit does
129	* that, so we can save a few bytes */
130	return EXIT_SUCCESS;
131	}