fdread.c revision 330449 
1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2001 Joerg Wunsch
5 *
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * $FreeBSD: stable/11/usr.sbin/fdread/fdread.c 330449 2018-03-05 07:26:05Z eadler $
29 */
30
31#include <sys/types.h>
32#include <sys/stat.h>
33#include <sys/fdcio.h>
34
35#include <err.h>
36#include <errno.h>
37#include <fcntl.h>
38#include <paths.h>
39#include <stdio.h>
40#include <stdlib.h>
41#include <string.h>
42#include <sysexits.h>
43#include <unistd.h>
44
45#include <dev/ic/nec765.h>
46
47#include "fdutil.h"
48
49static int	quiet, recover;
50static unsigned char fillbyte = 0xf0;	/* "foo" */
51
52static int	doread(int fd, FILE *of, const char *_devname);
53static int	doreadid(int fd, unsigned int numids, unsigned int trackno);
54static void	usage(void);
55
56static void
57usage(void)
58{
59
60	errx(EX_USAGE,
61	     "usage: fdread [-qr] [-d device] [-f fillbyte]\n"
62	     "       fdread [-d device] -I numids [-t trackno]");
63}
64
65
66int
67main(int argc, char **argv)
68{
69	int c, errs = 0;
70	unsigned int numids = 0, trackno = 0;
71	const char *fname = 0, *_devname = "/dev/fd0";
72	char *cp;
73	FILE *of = stdout;
74	int fd;
75	unsigned long ul;
76
77	while ((c = getopt(argc, argv, "d:f:I:o:qrt:")) != -1)
78		switch (c) {
79		case 'd':
80			_devname = optarg;
81			break;
82
83		case 'f':
84			ul = strtoul(optarg, &cp, 0);
85			if (*cp != '\0') {
86				fprintf(stderr,
87			"Bad argument %s to -f option; must be numeric\n",
88					optarg);
89				usage();
90			}
91			if (ul > 0xff)
92				warnx(
93			"Warning: fillbyte %#lx too large, truncating\n",
94				      ul);
95			fillbyte = ul & 0xff;
96			break;
97
98		case 'I':
99			ul = strtoul(optarg, &cp, 0);
100			if (*cp != '\0') {
101				fprintf(stderr,
102			"Bad argument %s to -I option; must be numeric\n",
103					optarg);
104				usage();
105			}
106			numids = ul;
107			break;
108
109		case 'o':
110			fname = optarg;
111			break;
112
113		case 'q':
114			quiet++;
115			break;
116
117		case 'r':
118			recover++;
119			break;
120
121		case 't':
122			ul = strtoul(optarg, &cp, 0);
123			if (*cp != '\0') {
124				fprintf(stderr,
125			"Bad argument %s to -t option; must be numeric\n",
126					optarg);
127				usage();
128			}
129			trackno = ul;
130			break;
131
132		default:
133			errs++;
134		}
135	argc -= optind;
136	argv += optind;
137
138	if (argc != 0 || errs)
139		usage();
140	/* check for mutually exclusive options */
141	if (numids) {
142		if (fname || quiet || recover)
143			usage();
144	} else {
145		if (trackno)
146			usage();
147	}
148
149	if (fname) {
150		if ((of = fopen(fname, "w")) == NULL)
151			err(EX_OSERR, "cannot create output file %s", fname);
152	}
153
154	if ((fd = open(_devname, O_RDONLY)) == -1)
155		err(EX_OSERR, "cannot open device %s", _devname);
156
157	return (numids? doreadid(fd, numids, trackno): doread(fd, of, _devname));
158}
159
160static int
161doread(int fd, FILE *of, const char *_devname)
162{
163	char *trackbuf;
164	int rv, fdopts, recoverable, nerrs = 0;
165	unsigned int nbytes, tracksize, mediasize, secsize, n;
166	struct fdc_status fdcs;
167	struct fd_type fdt;
168
169	if (ioctl(fd, FD_GTYPE, &fdt) == -1)
170		err(EX_OSERR, "ioctl(FD_GTYPE) failed -- not a floppy?");
171
172	secsize = 128 << fdt.secsize;
173	tracksize = fdt.sectrac * secsize;
174	mediasize = tracksize * fdt.tracks * fdt.heads;
175	if ((trackbuf = malloc(tracksize)) == NULL)
176		errx(EX_TEMPFAIL, "out of memory");
177
178	if (!quiet)
179		fprintf(stderr, "Reading %d * %d * %d * %d medium at %s\n",
180			fdt.tracks, fdt.heads, fdt.sectrac, secsize, _devname);
181
182	for (nbytes = 0; nbytes < mediasize;) {
183		if (lseek(fd, nbytes, SEEK_SET) != nbytes)
184			err(EX_OSERR, "cannot lseek()");
185		rv = read(fd, trackbuf, tracksize);
186		if (rv == 0) {
187			/* EOF? */
188			warnx("premature EOF after %u bytes", nbytes);
189			free(trackbuf);
190			return (EX_OK);
191		}
192		if ((unsigned)rv == tracksize) {
193			nbytes += rv;
194			if (!quiet)
195				fprintf(stderr, "%5d KB\r", nbytes / 1024);
196			fwrite(trackbuf, sizeof(unsigned char), rv, of);
197			fflush(of);
198			continue;
199		}
200		if (rv == -1) {
201			/* fall back reading one sector at a time */
202			for (n = 0; n < tracksize; n += secsize) {
203				if (lseek(fd, nbytes, SEEK_SET) != nbytes)
204					err(EX_OSERR, "cannot lseek()");
205				rv = read(fd, trackbuf, secsize);
206				if ((unsigned) rv == secsize) {
207					nbytes += rv;
208					if (!quiet)
209						fprintf(stderr, "%5d KB\r",
210							nbytes / 1024);
211					fwrite(trackbuf, sizeof(unsigned char),
212					       rv, of);
213					fflush(of);
214					continue;
215				}
216				if (rv == -1) {
217					if (errno != EIO) {
218						if (!quiet)
219							putc('\n', stderr);
220						perror("non-IO error");
221						free(trackbuf);
222						return (EX_OSERR);
223					}
224					if (ioctl(fd, FD_GSTAT, &fdcs) == -1)
225						errx(EX_IOERR,
226				     "floppy IO error, but no FDC status");
227					nerrs++;
228					recoverable = fdcs.status[2] &
229						NE7_ST2_DD;
230					if (!quiet) {
231						printstatus(&fdcs, 0);
232						fputs(" (", stderr);
233						if (!recoverable)
234							fputs("not ", stderr);
235						fputs("recoverable)", stderr);
236					}
237					if (!recover) {
238						if (!quiet)
239							putc('\n', stderr);
240						free(trackbuf);
241						return (EX_IOERR);
242					}
243					memset(trackbuf, fillbyte, secsize);
244					if (recoverable) {
245						fdopts |= FDOPT_NOERROR;
246						if (ioctl(fd, FD_SOPTS,
247							  &fdopts) == -1)
248							err(EX_OSERR,
249				    "ioctl(fd, FD_SOPTS, FDOPT_NOERROR)");
250						rv = read(fd, trackbuf,
251							  secsize);
252						if ((unsigned)rv != secsize)
253							err(EX_IOERR,
254				    "read() with FDOPT_NOERROR still fails");
255						fdopts &= ~FDOPT_NOERROR;
256						(void)ioctl(fd, FD_SOPTS,
257							    &fdopts);
258					}
259					if (!quiet) {
260						if (recoverable)
261							fprintf(stderr,
262								": recovered");
263						else
264							fprintf(stderr,
265								": dummy");
266						fprintf(stderr,
267							" data @ %#x ... %#x\n",
268							nbytes,
269							nbytes + secsize - 1);
270					}
271					nbytes += secsize;
272					fwrite(trackbuf, sizeof(unsigned char),
273					       secsize, of);
274					fflush(of);
275					continue;
276				}
277				errx(EX_OSERR, "unexpected read() result: %d",
278				     rv);
279			}
280		}
281		if ((unsigned)rv < tracksize) {
282			/* should not happen */
283			nbytes += rv;
284			if (!quiet)
285				fprintf(stderr, "\nshort after %5d KB\r",
286					nbytes / 1024);
287			fwrite(trackbuf, sizeof(unsigned char), rv, of);
288			fflush(of);
289			continue;
290		}
291	}
292	free(trackbuf);
293	if (!quiet) {
294		putc('\n', stderr);
295		if (nerrs)
296			fprintf(stderr, "%d error%s\n",
297				nerrs, nerrs > 1? "s": "");
298	}
299
300	return (nerrs? EX_IOERR: EX_OK);
301}
302
303static int
304doreadid(int fd, unsigned int numids, unsigned int trackno)
305{
306	int rv = 0;
307	unsigned int i;
308	struct fdc_readid info;
309	struct fdc_status fdcs;
310	struct fd_type fdt;
311
312	if (ioctl(fd, FD_GTYPE, &fdt) == -1)
313		err(EX_OSERR, "ioctl(FD_GTYPE) failed -- not a floppy?");
314
315	for (i = 0; i < numids; i++) {
316		info.cyl = trackno / fdt.heads;
317		info.head = fdt.heads > 1? trackno % fdt.heads: 0;
318		if (ioctl(fd, FD_READID, &info) == 0) {
319			printf("C = %d, H = %d, R = %d, N = %d\n",
320			       info.cyl, info.head, info.sec, info.secshift);
321		} else {
322			if (errno != EIO) {
323				perror("non-IO error");
324				return (EX_OSERR);
325			}
326			if (ioctl(fd, FD_GSTAT, &fdcs) == -1)
327				errx(EX_IOERR,
328				     "floppy IO error, but no FDC status");
329			printstatus(&fdcs, 0);
330			putc('\n', stderr);
331			rv = EX_IOERR;
332		}
333	}
334
335	return (rv);
336}
337