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	niro	532	/* vi: set sw=4 ts=4: */
2	niro	984	/* 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	niro	532	*/
7
8	niro	816	#include "libbb.h"
9	niro	532
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	niro	816	int fdformat_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
45			int fdformat_main(int argc UNUSED_PARAM, char **argv)
46	niro	532	{
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	niro	816	opt_complementary = "=1"; /* must have 1 param */
54			verify = !getopt32(argv, "n");
55	niro	532	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	niro	816	xioctl(fd, FDGETPRM, &param);
68	niro	532
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	niro	816	xioctl(fd, FDFMTBEG, NULL);
76	niro	532
77			/* n == track */
78			for (n = 0; n < param.track; n++) {
79			descr.head = 0;
80			descr.track = n;
81	niro	816	xioctl(fd, FDFMTTRK, &descr);
82	niro	532	printf("%3d\b\b\b", n);
83			if (param.head == 2) {
84			descr.head = 1;
85	niro	816	xioctl(fd, FDFMTTRK, &descr);
86	niro	532	}
87			}
88
89	niro	816	xioctl(fd, FDFMTEND, NULL);
90	niro	532	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	niro	816	printf("bad data in cyl %d\nContinuing... ", cyl);
114	niro	532	}
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			}