FreeBSD-5.3/usr.sbin/fdread/fdread.c
/*
* Copyright (c) 2001 Joerg Wunsch
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $FreeBSD: src/usr.sbin/fdread/fdread.c,v 1.5 2001/07/02 21:21:58 joerg Exp $
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/fdcio.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <paths.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <unistd.h>
#include <dev/ic/nec765.h>
#include "fdutil.h"
int quiet, recover;
unsigned char fillbyte = 0xf0; /* "foo" */
int doread(int fd, FILE *of, const char *devname);
int doreadid(int fd, unsigned int numids, unsigned int trackno);
void usage(void);
void
usage(void)
{
errx(EX_USAGE,
"usage: fdread [-qr] [-d device] [-f fillbyte]\n"
" fdread [-d device] -I numids [-t trackno]");
}
int
main(int argc, char **argv)
{
int c, errs = 0;
unsigned int numids = 0, trackno = 0;
const char *fname = 0, *devname = "/dev/fd0";
char *cp;
FILE *of = stdout;
int fd;
unsigned long ul;
while ((c = getopt(argc, argv, "d:f:I:o:qrt:")) != -1)
switch (c) {
case 'd':
devname = optarg;
break;
case 'f':
ul = strtoul(optarg, &cp, 0);
if (*cp != '\0') {
fprintf(stderr,
"Bad argument %s to -f option; must be numeric\n",
optarg);
usage();
}
if (ul > 0xff)
warnx(
"Warning: fillbyte %#lx too large, truncating\n",
ul);
fillbyte = ul & 0xff;
break;
case 'I':
ul = strtoul(optarg, &cp, 0);
if (*cp != '\0') {
fprintf(stderr,
"Bad argument %s to -I option; must be numeric\n",
optarg);
usage();
}
numids = ul;
break;
case 'o':
fname = optarg;
break;
case 'q':
quiet++;
break;
case 'r':
recover++;
break;
case 't':
ul = strtoul(optarg, &cp, 0);
if (*cp != '\0') {
fprintf(stderr,
"Bad argument %s to -t option; must be numeric\n",
optarg);
usage();
}
trackno = ul;
break;
default:
errs++;
}
argc -= optind;
argv += optind;
if (argc != 0 || errs)
usage();
/* check for mutually exclusive options */
if (numids) {
if (fname || quiet || recover)
usage();
} else {
if (trackno)
usage();
}
if (fname) {
if ((of = fopen(fname, "w")) == NULL)
err(EX_OSERR, "cannot create output file %s", fname);
}
if ((fd = open(devname, O_RDONLY)) == -1)
err(EX_OSERR, "cannot open device %s", devname);
return (numids? doreadid(fd, numids, trackno): doread(fd, of, devname));
}
int
doread(int fd, FILE *of, const char *devname)
{
char *trackbuf;
int rv, fdopts, recoverable, nerrs = 0;
unsigned int nbytes, tracksize, mediasize, secsize, n;
struct fdc_status fdcs;
struct fd_type fdt;
if (ioctl(fd, FD_GTYPE, &fdt) == -1)
err(EX_OSERR, "ioctl(FD_GTYPE) failed -- not a floppy?");
fdopts = FDOPT_NOERRLOG;
if (ioctl(fd, FD_SOPTS, &fdopts) == -1)
err(EX_OSERR, "ioctl(FD_SOPTS, FDOPT_NOERRLOG)");
secsize = 128 << fdt.secsize;
tracksize = fdt.sectrac * secsize;
mediasize = tracksize * fdt.tracks * fdt.heads;
if ((trackbuf = malloc(tracksize)) == 0)
errx(EX_TEMPFAIL, "out of memory");
if (!quiet)
fprintf(stderr, "Reading %d * %d * %d * %d medium at %s\n",
fdt.tracks, fdt.heads, fdt.sectrac, secsize, devname);
for (nbytes = 0; nbytes < mediasize;) {
if (lseek(fd, nbytes, SEEK_SET) != nbytes)
err(EX_OSERR, "cannot lseek()");
rv = read(fd, trackbuf, tracksize);
if (rv == 0) {
/* EOF? */
warnx("premature EOF after %u bytes", nbytes);
return (EX_OK);
}
if (rv == tracksize) {
nbytes += rv;
if (!quiet)
fprintf(stderr, "%5d KB\r", nbytes / 1024);
fwrite(trackbuf, sizeof(unsigned char), rv, of);
fflush(of);
continue;
}
if (rv < tracksize) {
/* should not happen */
nbytes += rv;
if (!quiet)
fprintf(stderr, "\nshort after %5d KB\r",
nbytes / 1024);
fwrite(trackbuf, sizeof(unsigned char), rv, of);
fflush(of);
continue;
}
if (rv == -1) {
/* fall back reading one sector at a time */
for (n = 0; n < tracksize; n += secsize) {
if (lseek(fd, nbytes, SEEK_SET) != nbytes)
err(EX_OSERR, "cannot lseek()");
rv = read(fd, trackbuf, secsize);
if (rv == secsize) {
nbytes += rv;
if (!quiet)
fprintf(stderr, "%5d KB\r",
nbytes / 1024);
fwrite(trackbuf, sizeof(unsigned char),
rv, of);
fflush(of);
continue;
}
if (rv == -1) {
if (errno != EIO) {
if (!quiet)
putc('\n', stderr);
perror("non-IO error");
return (EX_OSERR);
}
if (ioctl(fd, FD_GSTAT, &fdcs) == -1)
errx(EX_IOERR,
"floppy IO error, but no FDC status");
nerrs++;
recoverable = fdcs.status[2] &
NE7_ST2_DD;
if (!quiet) {
printstatus(&fdcs, 0);
fputs(" (", stderr);
if (!recoverable)
fputs("not ", stderr);
fputs("recoverable)", stderr);
}
if (!recover) {
if (!quiet)
putc('\n', stderr);
return (EX_IOERR);
}
memset(trackbuf, fillbyte, secsize);
if (recoverable) {
fdopts |= FDOPT_NOERROR;
if (ioctl(fd, FD_SOPTS,
&fdopts) == -1)
err(EX_OSERR,
"ioctl(fd, FD_SOPTS, FDOPT_NOERROR)");
rv = read(fd, trackbuf,
secsize);
if (rv != secsize)
err(EX_IOERR,
"read() with FDOPT_NOERROR still fails");
fdopts &= ~FDOPT_NOERROR;
(void)ioctl(fd, FD_SOPTS,
&fdopts);
}
if (!quiet) {
if (recoverable)
fprintf(stderr,
": recovered");
else
fprintf(stderr,
": dummy");
fprintf(stderr,
" data @ %#x ... %#x\n",
nbytes,
nbytes + secsize - 1);
}
nbytes += secsize;
fwrite(trackbuf, sizeof(unsigned char),
secsize, of);
fflush(of);
continue;
}
errx(EX_OSERR, "unexpected read() result: %d",
rv);
}
}
}
if (!quiet) {
putc('\n', stderr);
if (nerrs)
fprintf(stderr, "%d error%s\n",
nerrs, nerrs > 1? "s": "");
}
return (nerrs? EX_IOERR: EX_OK);
}
int
doreadid(int fd, unsigned int numids, unsigned int trackno)
{
int rv = 0, status, fdopts;
unsigned int i;
struct fdc_readid info;
struct fdc_status fdcs;
struct fd_type fdt;
if (ioctl(fd, FD_GTYPE, &fdt) == -1)
err(EX_OSERR, "ioctl(FD_GTYPE) failed -- not a floppy?");
fdopts = FDOPT_NOERRLOG;
if (ioctl(fd, FD_SOPTS, &fdopts) == -1)
err(EX_OSERR, "ioctl(FD_SOPTS, FDOPT_NOERRLOG)");
for (i = 0; i < numids; i++) {
info.cyl = trackno / fdt.heads;
info.head = fdt.heads > 1? trackno % fdt.heads: 0;
if ((status = ioctl(fd, FD_READID, &info)) == 0) {
printf("C = %d, H = %d, R = %d, N = %d\n",
info.cyl, info.head, info.sec, info.secshift);
} else {
if (errno != EIO) {
perror("non-IO error");
return (EX_OSERR);
}
if (ioctl(fd, FD_GSTAT, &fdcs) == -1)
errx(EX_IOERR,
"floppy IO error, but no FDC status");
printstatus(&fdcs, 0);
putc('\n', stderr);
rv = EX_IOERR;
}
}
return (rv);
}