Remove `diskcheckd'. It is now in ports/sysutils.

Consensus on:	freebsd-current.

4 files changed, 0 insertions, 1092 deletions

diff --git a/etc/diskcheckd.conf b/etc/diskcheckd.conf
deleted file mode 100644
index 86e3c30..0000000
--- a/etc/diskcheckd.conf
+++ /dev/null
@@ -1,30 +0,0 @@
-# $FreeBSD$
-#
-# Configuration file for diskcheckd, refer to the diskcheckd.conf(5) manual
-# page for further information.
-#
-# First, a line starting with an exclamation mark should contain only one
-# extra field which specifies disk types which should not be included in
-# wildcard expansions.  By default CD-ROM drives and memory disks are
-# excluded.
-#
-!acd
-!cd
-!matcd
-!mcd
-!scd
-!md
-#
-# The device name may be specified as "*", in which case all devices are
-# checked.
-#
-# The size may be specified as "*", in which case the size is automatically
-# determined from the disklabel.
-#
-# One of either "Days" or "Rate" must be specified, to specify a complete
-# scan should happen once every n days, or that scanning should take place
-# at n KB/s.  Note that the "Days" value will not cause a scan exactly every
-# n days since diskcheckd will always read in power-of-2 size blocks.
-#
-# Device	Size	Days	Rate
-*		*	28	*
diff --git a/usr.sbin/diskcheckd/Makefile b/usr.sbin/diskcheckd/Makefile
deleted file mode 100644
index 265acaa..0000000
--- a/usr.sbin/diskcheckd/Makefile
+++ /dev/null
@@ -1,9 +0,0 @@
-# $FreeBSD$
-
-BINDIR?=	/usr/sbin
-
-PROG=	diskcheckd
-MAN8=	diskcheckd.8
-MLINKS=	diskcheckd.8 diskcheckd.conf.5
-
-.include <bsd.prog.mk>
diff --git a/usr.sbin/diskcheckd/diskcheckd.8 b/usr.sbin/diskcheckd/diskcheckd.8
deleted file mode 100644
index 83d7878..0000000
--- a/usr.sbin/diskcheckd/diskcheckd.8
+++ /dev/null
@@ -1,190 +0,0 @@
-.\" Copyright (c) 2000, 2001 Ben Smithurst <ben@FreeBSD.org>
-.\" 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 AUTHOR AND CONTRIBUTORS ``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 AUTHOR OR CONTRIBUTORS 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.
-.\"
-.\" $FreeBSD$
-.\"
-.Dd July 4, 2001
-.Dt DISKCHECKD 8
-.Os
-.Sh NAME
-.Nm diskcheckd
-.Nd daemon to check for disk read errors
-.Sh SYNOPSIS
-.Nm
-.Op Fl d
-.Op Fl f Ar conf_file
-.Op Fl o Ar save_file
-.Sh DESCRIPTION
-.Nm
-is a daemon which runs in the background,
-reading entire disks to find any read errors on those disks.
-The disks which should be scanned,
-and the rates at which they should be scanned,
-must be specified in the configuration file,
-which is
-.Pa /etc/diskcheckd.conf
-by default.
-.Pp
-Any blank lines or lines starting with a
-.Ql #
-character in this file are ignored.
-Each non-comment line of this file must be in one of two formats.
-The first format is
-.Ql !xx ,
-and specifies that device names matching
-.Pa /dev/xx*
-should not be included in expansion of wildcards (see below).
-The second format consists of four white space separated
-fields,
-which are the full pathname of the disk device,
-the size of that disk,
-the frequency in days at which to check that disk,
-and the rate in kilobytes per second at which to check this disk.
-Naturally,
-it would be contradictory to specify both the frequency and the rate,
-so only one of these should be specified.
-Additionally,
-the size of the disk should not be specified if the rate is specified,
-as this information is unnecessary.
-.Pp
-If the disk is specified as
-.Dq * ,
-then
-.Nm
-will apply the given settings to all disks in the system,
-obtained using the
-.Va kern.disks
-sysctl variable.
-If the size is specified as
-.Dq *
-(recommended),
-then the size of the disk will be automatically determined from the
-disklabel,
-if possible.
-Fields which are not specified should contain a single
-.Dq *
-character.
-.Pp
-Note that
-.Nm
-always reads data from the disk in 64KB blocks,
-so the rate your specify may not be the exact rate at which the disk is
-actually checked.
-Similarly,
-if you specify the third field (days for complete scan) it is unlikely
-that a complete scan will actually take exactly this many days.
-.Pp
-To run
-.Nm
-automatically at boot time,
-the
-.Va diskcheckd_enable
-variable in
-.Xr rc.conf 5
-should be set to
-.Dq YES .
-.Pp
-When
-.Nm
-receives a
-.Dv SIGTERM
-or
-.Dv SIGINT
-signal,
-it saves its current state information to a file,
-so that after a reboot
-.Nm
-can resume reading from where it left off,
-rather than starting from the beginning of the disk again.
-The information saved to this file consists of the device filename and the
-current offset into that device.
-.Pp
-.Nm
-can be instructed to reload the configuration file by sending it a
-.Dv SIGHUP
-signal.
-.Pp
-.Nm
-accepts the following command line options:
-.Bl -tag -width Fl
-.It Fl d
-If this flag is specified,
-.Nm
-will not fork into the background and detach from its controlling terminal
-to become a daemon.
-This flag is primarily used for debugging.
-.It Fl f
-Specify the configuration file to use,
-instead of the default
-.Pa /etc/diskcheckd.conf .
-.It Fl o
-Specify the file to save disk offsets to,
-instead of the default
-.Pa /var/db/diskcheckd.offsets .
-.El
-.Sh FILES
-.Bl -tag -width /var/db/diskcheckd.offsets -compact
-.It Pa /etc/diskcheckd.conf
-Default configuration file.
-.It Pa /var/db/diskcheckd.offsets
-Default location of saved offsets.
-.El
-.Sh EXAMPLES
-To check all of
-.Pa /dev/ad0
-for errors once every two weeks,
-use this entry in
-.Pa diskcheckd.conf :
-.Bd -literal -offset indent
-/dev/ad0	*	14	*
-.Ed
-.Pp
-To check the first SCSI disk for errors at approximately 64KB/s,
-use the following entry:
-.Bd -literal -offset indent
-/dev/da0	*	*	64
-.Ed
-.Pp
-To check all disks once every four weeks:
-.Bd -literal -offset indent
-*	*	28	*
-.Ed
-.Sh DIAGNOSTICS
-If any errors occur,
-they will be written to
-.Xr syslogd 8 .
-.Sh HISTORY
-.Nm
-first appeared in
-.Fx 5.0 .
-.Sh AUTHORS
-.An -nosplit
-.Nm
-and this manual page were written by
-.An Ben Smithurst Aq ben@FreeBSD.org ,
-with input from
-.An Poul-Henning Kamp Aq phk@FreeBSD.org .
-.Sh BUGS
-.Nm
-assumes all disks have 512 byte sectors.
diff --git a/usr.sbin/diskcheckd/diskcheckd.c b/usr.sbin/diskcheckd/diskcheckd.c
deleted file mode 100644
index 0b41bec..0000000
--- a/usr.sbin/diskcheckd/diskcheckd.c
+++ /dev/null
@@ -1,863 +0,0 @@
-/*-
- * Copyright (c) 2000, 2001 Ben Smithurst <ben@FreeBSD.org>
- * 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 AUTHOR AND CONTRIBUTORS ``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 AUTHOR OR CONTRIBUTORS 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.
- */
-
-static const char rcsid[] =
-	"$FreeBSD$";
-
-#include <sys/types.h>
-#include <sys/sysctl.h>
-
-#include <ctype.h>
-#include <err.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <limits.h>
-#include <paths.h>
-#include <signal.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <syslog.h>
-#include <time.h>
-#include <unistd.h>
-
-#define DKTYPENAMES
-#include <sys/disklabel.h>
-
-#define	_PATH_CONF	"/etc/diskcheckd.conf"
-#define	_PATH_SAVE	_PATH_VARDB"diskcheckd.offsets"
-
-#define	READ_SIZE (64 << 10)
-
-struct disk {
-	int fd;
-	char *device;
-	off_t size;
-	int secsize;
-	int days, rate, errors, interval, next;
-};
-
-volatile sig_atomic_t got_sighup = 0, got_sigterm = 0;
-
-char **getdisknames(char **, int);
-off_t dseek(struct disk *, off_t, int);
-struct disk *readconf(const char *);
-void getdisksize(struct disk *);
-void logreaderror(struct disk *, int);
-void readchunk(struct disk *, char *);
-void readoffsets(struct disk *, const char *);
-void sighup(int);
-void sigterm(int);
-void updateproctitle(struct disk *);
-void usage(void);
-void writeoffsets(struct disk *, const char *);
-
-int
-main(int argc, char *argv[]) {
-	char *buf;
-	struct disk *disks, *dp;
-	int ch, ok, minwait, nextwait;
-	struct sigaction sa;
-	int counter, debug;
-	const char *conf_file, *save_file;
-
-	conf_file = _PATH_CONF;
-	save_file = _PATH_SAVE;
-	debug = 0;
-
-	while ((ch = getopt(argc, argv, "df:o:")) != -1)
-		switch (ch) {
-		case 'd':
-			debug = 1;
-			break;
-		case 'f':
-			conf_file = optarg;
-			break;
-		case 'o':
-			save_file = optarg;
-			break;
-		default:
-			usage();
-			/* NOTREACHED */
-		}
-
-	argv += optind;
-	argc -= optind;
-
-	if (argc != 0)
-		usage();
-
-	openlog("diskcheckd", LOG_CONS|LOG_PID, LOG_DAEMON);
-
-	if (!debug && daemon(0, 0) < 0) {
-		syslog(LOG_NOTICE, "daemon failure: %m");
-		exit(EXIT_FAILURE);
-	}
-
-	sa.sa_handler = sigterm;
-	sa.sa_flags = SA_RESTART;
-	sigemptyset(&sa.sa_mask);
-	sigaction(SIGTERM, &sa, NULL);
-	sigaction(SIGINT, &sa, NULL);
-
-	sa.sa_handler = sighup;
-	sigaction(SIGHUP, &sa, NULL);
-
-	/* Read the configuration file and the saved offsets */
-	disks = readconf(conf_file);
-	readoffsets(disks, save_file);
-
-	if ((buf = malloc(READ_SIZE)) == NULL) {
-		syslog(LOG_NOTICE, "malloc failure: %m");
-		exit(EXIT_FAILURE);
-	}
-
-	/* The main disk checking loop.
-	 *
-	 * We wait the shortest amount of time we need to before
-	 * another disk is due for a read -- this time is updated
-	 * in the 'nextwait' variable, which is then copied to
-	 * 'minwait'.  After a sleep, 'minwait' is subtracted from
-	 * each disk's 'next' field, and when that reaches zero,
-	 * that disk is read again.
-	 */
-	counter = 0;
-	minwait = 0;
-	while (!got_sigterm) {
-		ok = 0;
-		nextwait = INT_MAX;
-		for (dp = disks; dp->device != NULL; dp++)
-			if (dp->fd != -1) {
-				if ((dp->next -= minwait) == 0) {
-					ok = 1;
-					readchunk(dp, buf);
-				}
-
-				/* XXX debugging */
-				if (dp->next < 0) {
-					syslog(LOG_NOTICE,
-					  "dp->next < 0 for %s", dp->device);
-					abort();
-				}
-
-				if (dp->next < nextwait)
-					nextwait = dp->next;
-			}
-
-		if (!ok) {
-			syslog(LOG_EMERG, "all disks had read errors");
-			exit(EXIT_FAILURE);
-		}
-
-		if (counter >= 300) {
-			updateproctitle(disks);
-			writeoffsets(disks, save_file);
-			counter = 0;
-		}
-
-		minwait = nextwait;
-		sleep(minwait);
-		counter += minwait;
-
-		if (got_sighup) {
-			/*
-			 * Got a SIGHUP, so save the offsets, free the
-			 * memory used for the disk structures, and then
-			 * re-read the config file and the disk offsets.
-			 */
-			writeoffsets(disks, save_file);
-			for (dp = disks; dp->device != NULL; dp++) {
-				free(dp->device);
-				close(dp->fd);
-			}
-			free(disks);
-			disks = readconf(conf_file);
-			readoffsets(disks, save_file);
-			got_sighup = 0;
-		}
-	}
-
-	writeoffsets(disks, save_file);
-	return (EXIT_SUCCESS);
-}
-
-/*
- * Read the next chunk from the specified disk, retrying if necessary.
- */
-void
-readchunk(struct disk *dp, char *buf) {
-	ssize_t n;
-	int s;
-
-	dp->next = dp->interval;
-	n = read(dp->fd, buf, READ_SIZE);
-	if (n == 0) {
-		eof:
-		syslog(LOG_INFO, "reached end of %s with %d errors",
-		    dp->device, dp->errors);
-		dseek(dp, 0, SEEK_SET);
-		dp->errors = 0;
-		return;
-	} else if (n > 0)
-		return;
-
-	/*
-	 * Read error, retry in smaller chunks.
-	 */
-	logreaderror(dp, READ_SIZE);
-
-	for (s = 0; s < READ_SIZE; s += 512) {
-		n = read(dp->fd, buf, 512);
-		if (n == 0)
-			goto eof;
-		else if (n < 0) {
-			/* log the error and seek past it. */
-			logreaderror(dp, 512);
-			dseek(dp, 512, SEEK_CUR);
-		}
-	}
-}
-
-const char *
-fstypename(u_int8_t type) {
-	static char buf[32];
-
-	if (type < FSMAXTYPES)
-		return (fstypenames[type]);
-	else {
-		snprintf(buf, sizeof buf, "%u", type);
-		return (buf);
-	}
-}
-
-/*
- * Report a read error, logging how many bytes were trying to be read, which
- * sector they were being read from, and try to also find out what that sector
- * is used for.
- */
-void
-logreaderror(struct disk *dp, int nbytes) {
-	quad_t secno;
-	off_t saved_offset;
-	int fd, slice, part;
-	struct dos_partition *dos;
-	struct disklabel label;
-	char buf[512];
-	char newdev[512];
-
-	saved_offset = dseek(dp, 0, SEEK_CUR);
-	secno = (quad_t)saved_offset / dp->secsize;
-	dp->errors++;
-
-	syslog(LOG_NOTICE, "error reading %d bytes from sector %qd on %s",
-	    nbytes, secno, dp->device);
-
-	/*
-	 * First, find out which slice it's in.  To do this, we seek to the
-	 * start of the disk, read the first sector, and go through the DOS
-	 * slice table.
-	 */
-	if (dseek(dp, 0, SEEK_SET) == -1)
-		exit(EXIT_FAILURE);
-
-	if (read(dp->fd, buf, sizeof buf) != sizeof buf) {
-		dseek(dp, saved_offset, SEEK_SET);
-		return;
-	}
-
-	/* seek back to where we were */
-	if (dseek(dp, saved_offset, SEEK_SET) == -1)
-		exit(EXIT_FAILURE);
-
-	dos = (struct dos_partition *)&buf[DOSPARTOFF];
-	for (slice = 0; slice < NDOSPART; slice++)
-		if (dos[slice].dp_start <= secno &&
-		  secno < dos[slice].dp_start + dos[slice].dp_size)
-			break;
-
-	if (slice == NDOSPART) {
-		syslog(LOG_NOTICE,
-		  "sector %qd on %s doesn't appear "
-		  "to be within any DOS slice", secno, dp->device);
-		return;
-	}
-
-	/* Make secno relative to this slice */
-	secno -= dos[slice].dp_start;
-
-	snprintf(newdev, sizeof newdev, "%ss%d", dp->device, slice + 1);
-	syslog(LOG_DEBUG, "bad sector seems to be within %s", newdev);
-
-	/* Check the type of that partition. */
-	if (dos[slice].dp_typ != DOSPTYP_386BSD) {
-		/* If not a BSD slice, we can't do much more. */
-		syslog(LOG_NOTICE, "last bad sector is sector %qd "
-		    "on device %s, type %02x", secno, newdev,
-		    dos[slice].dp_typ);
-		return;
-	}
-
-	if ((fd = open(newdev, O_RDONLY)) < 0) {
-		syslog(LOG_NOTICE, "open %s failure: %m", newdev);
-		return;
-	}
-
-	/* Try to read the disklabel from that device. */
-	if (ioctl(fd, DIOCGDINFO, &label) < 0) {
-		syslog(LOG_NOTICE, "DIOCGDINFO on %s failed: %m",
-		    newdev);
-		return;
-	}
-
-	/* Check which partition this sector is in. */
-	for (part = 0; part < MAXPARTITIONS; part++)
-		if (part != 2 && /* skip 'c' partition */
-		    label.d_partitions[part].p_offset <= secno &&
-		    secno < label.d_partitions[part].p_offset +
-		            label.d_partitions[part].p_size)
-			break;
-
-	if (part == MAXPARTITIONS) {
-		syslog(LOG_NOTICE,
-		  "sector %qd on %s doesn't appear "
-		  "to be within any BSD partition", secno, newdev);
-		return;
-	}
-
-	secno -= label.d_partitions[part].p_offset;
-	snprintf(newdev, sizeof newdev, "%ss%d%c",
-	    dp->device, slice + 1, 'a' + part);
-	syslog(LOG_DEBUG, "bad sector seems to be within %s", newdev);
-	if (label.d_partitions[part].p_fstype != FS_BSDFFS) {
-		/* Again, if not a BSD partition, can't do much. */
-		syslog(LOG_NOTICE, "last bad sector is sector %qd "
-		    "on device %s, type %s", secno, newdev,
-		    fstypename(label.d_partitions[part].p_fstype));
-		return;
-	}
-
-	syslog(LOG_NOTICE, "last bad sector is sector %qd "
-	  "on 4.2BSD filesystem %s", secno, newdev);
-
-	/*
-	 * XXX: todo: find out which file on the BSD filesystem uses this
-	 * sector...
-	 */
-}
-
-/*
- * Read the offsets written by writeoffsets().
- */
-void
-readoffsets(struct disk *disks, const char *save_file) {
-	FILE *fp;
-	struct disk *dp;
-	char *space, buf[1024];
-
-	if ((fp = fopen(save_file, "r")) == NULL) {
-		if (errno != ENOENT)
-			syslog(LOG_NOTICE, "open %s failed: %m", save_file);
-		return;
-	}
-
-	while (fgets(buf, sizeof buf, fp) != NULL) {
-		if ((space = strchr(buf, ' ')) == NULL)
-			continue;
-		*space = '\0';
-
-		for (dp = disks;
-		    dp->device != NULL && strcmp(dp->device, buf) != 0; dp++)
-			; /* nothing */
-
-		if (dp->device != NULL)
-			dseek(dp, (off_t)strtoq(space + 1, NULL, 0), SEEK_SET);
-	}
-	fclose(fp);
-}
-
-/*
- * Save the offsets we've reached for each disk to a file, so we can start
- * at that position next time the daemon is started.
- */
-void
-writeoffsets(struct disk *disks, const char *save_file) {
-	FILE *fp;
-	struct disk *dp;
-
-	if ((fp = fopen(save_file, "w")) == NULL) {
-		syslog(LOG_NOTICE, "open %s failed: %m", save_file);
-		return;
-	}
-
-	for (dp = disks; dp->device != NULL; dp++)
-		if (strcmp(dp->device, "*") != 0)
-			fprintf(fp, "%s %qd\n", dp->device,
-			    (quad_t)dseek(dp, 0, SEEK_CUR));
-	fclose(fp);
-}
-
-/*
- * Set the process title so it's easy to see using ps(1) how much has been
- * done.
- */
-void
-updateproctitle(struct disk *disks) {
-	struct disk *dp;
-	char *bp, *p;
-	static char *buf;
-	static size_t bufsize;
-	size_t size;
-	int inc, ret;
-	double percent;
-
-	bp = buf;
-	size = bufsize;
-	for (dp = disks; dp->device != NULL; dp++) {
-		p = dp->device;
-		if (strcmp(p, "*") == 0)
-			continue;
-		if (strncmp(p, _PATH_DEV, sizeof _PATH_DEV - 1) == 0)
-			p += sizeof _PATH_DEV - 1;
-
-		percent = 100 * (double)dseek(dp, 0, SEEK_CUR) / dp->size;
-		if ((ret = snprintf(bp, size, "%s %.2f%%, ", p, percent)) < 0)
-			ret = 0;
-		if ((size_t)ret >= size) {
-			inc = ((ret + 1023) >> 10) << 10;
-			size += inc;
-			bufsize += inc;
-			if ((buf = reallocf(buf, bufsize)) == NULL) {
-				/* Not fatal. */
-				syslog(LOG_NOTICE, "reallocf failure: %m");
-				bufsize = 0;
-				return;
-			}
-			bp = buf + bufsize - size;
-			ret = snprintf(bp, size, "%s %.2f%%, ", p, percent);
-			if (ret < 0)
-				ret = 0;
-		}
-		bp += ret;
-		size -= ret;
-	}
-
-	if (buf != NULL) {
-		/* Remove the trailing comma. */
-		if (&bp[-2] >= buf)
-			bp[-2] = '\0';
-		setproctitle("%s", buf);
-	}
-}
-
-/* used to keep track of which fields have been specified */
-#define FL_SIZE_SPEC 1
-#define FL_DAYS_SPEC 2
-#define FL_RATE_SPEC 4
-
-/*
- * Read the configuration file, set the rate appropriately for each disk,
- * and get a file descriptor for each disk.
- */
-struct disk *
-readconf(const char *conf_file) {
-	FILE *fp;
-	char buf[1024], *line, *field, *ep, **np, **np0;
-	int fields, flags;
-	struct disk *disks, *dp, *odisks;
-	int numdisks, onumdisks;
-	double dval;
-	long lval;
-	int linenum;
-	char **skip;
-	int numskip;
-
-	if ((fp = fopen(conf_file, "r")) == NULL) {
-		syslog(LOG_NOTICE, "open %s failure: %m", conf_file);
-		exit(EXIT_FAILURE);
-	}
-
-	numdisks = 0;
-	disks = NULL;
-	linenum = 0;
-	skip = NULL;
-	numskip = 0;
-
-	/* Step 1: read and parse the configuration file. */
-	while (fgets(buf, sizeof buf, fp) != NULL) {
-		line = buf;
-		linenum++;
-		while (isspace(*line))
-			line++;
-		if (*line == '#' || *line == '\n' || *line == '\0')
-			continue;
-
-		/* First, if the line starts with '!', this is a disk name
-		 * to ignore.  For example, '!md' will skip all '/dev/md*'
-		 * devices.
-		 */
-		if (*line == '!') {
-			line++;
-			while (isspace(*line))
-				line++;
-			field = strsep(&line, " \t\n");
-			if (field == NULL || *field == '\0') {
-				syslog(LOG_NOTICE, "%s:%d: missing disk name",
-				  conf_file, linenum);
-				continue;
-			}
-
-			numskip++;
-			if ((skip = reallocf(skip,
-			  numskip * sizeof (*skip))) == NULL) {
-				syslog(LOG_NOTICE, "reallocf failure: %m");
-				exit(EXIT_FAILURE);
-			}
-
-			if ((skip[numskip-1] = strdup(field)) == NULL) {
-				syslog(LOG_NOTICE, "strdup failure: %m");
-				exit(EXIT_FAILURE);
-			}
-
-			continue;
-		}
-
-		fields = flags = 0;
-		while ((field = strsep(&line, " \t\n")) != NULL) {
-			if (*field == '\0')
-				continue;
-
-			/*
-			 * If this is the first field on a line, allocate
-			 * space for one more disk structure.
-			 */
-			if (fields == 0 && (disks = reallocf(disks,
-			    (numdisks + 1) * sizeof (*disks))) == NULL) {
-				syslog(LOG_NOTICE, "reallocf failure: %m");
-				exit(EXIT_FAILURE);
-			}
-
-			dp = &disks[numdisks];
-			switch (fields++) {
-			case 0:
-				/* device name */
-				if ((dp->device = strdup(field)) == NULL) {
-					syslog(LOG_NOTICE,
-					    "strdup failure: %m");
-					exit(EXIT_FAILURE);
-				}
-				dp->fd = -1;
-				dp->rate = -1;
-				dp->size = -1;
-				dp->interval = -1;
-				dp->next = 0;
-				break;
-			case 1:
-				/* size */
-				if (strcmp(field, "*") == 0)
-					break;
-				flags |= FL_SIZE_SPEC;
-				dval = strtod(field, &ep);
-				if (dval < 0) {
-					syslog(LOG_NOTICE,
-					    "%s:%d: size cannot be negative",
-					    conf_file, linenum);
-					exit(EXIT_FAILURE);
-				}
-				if (strcasecmp(ep, "M") == 0)
-					dp->size = dval * 1024 * 1024;
-				else if (strcasecmp(ep, "G") == 0)
-					dp->size = dval * 1024 * 1024 * 1024;
-				else if (*ep == '\0')
-					dp->size = dval;
-				else {
-					syslog(LOG_NOTICE,
-					    "%s:%d: bad suffix \"%s\" on "
-					    "size \"%s\"", conf_file,
-					    linenum, ep, field);
-					exit(EXIT_FAILURE);
-				}
-				break;
-			case 2:
-				/* days */
-				if (strcmp(field, "*") == 0)
-					break;
-				flags |= FL_DAYS_SPEC;
-				lval = strtol(field, &ep, 0);
-				if (ep == field || *ep != '\0' ||
-				    lval <= 0) {
-					syslog(LOG_NOTICE,
-					    "%s:%d: bad number of days",
-					    conf_file, linenum);
-					exit(EXIT_FAILURE);
-				}
-				dp->days = lval;
-				break;
-			case 3:
-				/* rate */
-				if (strcmp(field, "*") == 0)
-					break;
-				flags |= FL_RATE_SPEC;
-				lval = strtol(field, &ep, 0);
-				if (ep == field || *ep != '\0' ||
-				    lval <= 0) {
-					syslog(LOG_NOTICE, "%s:%d: bad rate",
-					    conf_file, linenum);
-					exit(EXIT_FAILURE);
-				}
-				dp->rate = lval * 1024;
-				break;
-			default:
-				/* Report error at end of line. */
-				break;
-			}
-		}
-		if (fields != 4) {
-			syslog(LOG_NOTICE,
-			    "%s:%d: %d fields, should be 4",
-			    conf_file, linenum, fields);
-			exit(EXIT_FAILURE);
-		}
-		if (flags != (FL_SIZE_SPEC|FL_DAYS_SPEC) &&
-		    flags != FL_DAYS_SPEC &&
-		    flags != FL_RATE_SPEC) {
-			syslog(LOG_NOTICE,
-			    "%s:%d: should specify frequency "
-			    "or rate, not both", conf_file,
-			    linenum);
-			exit(EXIT_FAILURE);
-		}
-		numdisks++;
-	}
-	fclose(fp);
-
-	if (numdisks == 0) {
-		syslog(LOG_NOTICE, "no disks specified");
-		exit(EXIT_FAILURE);
-	}
-
-	/*
-	 * Step 2: expand any dp->device == "*" entries.  onumdisks is used
-	 * so that we don't keep checking dp->device for the new disks as
-	 * they're added, since that's pointless.
-	 */
-	onumdisks = numdisks;
-	for (dp = disks; dp < disks + onumdisks; dp++) {
-		if (strcmp(dp->device, "*") == 0) {
-			for (np = np0 = getdisknames(skip, numskip); *np != NULL; np++) {
-				odisks = disks;
-				if ((disks = reallocf(disks,
-				    (numdisks + 1) * sizeof (*disks))) == NULL) {
-					syslog(LOG_NOTICE,
-					  "reallocf failure: %m");
-					exit(EXIT_FAILURE);
-				}
-
-				/* "disks" pointer may have changed. */
-				dp = disks + (dp - odisks);
-
-				disks[numdisks].rate = dp->rate;
-				disks[numdisks].size = dp->size;
-				disks[numdisks].days = dp->days;
-				disks[numdisks].interval = dp->interval;
-				disks[numdisks].next = 0;
-				disks[numdisks].device = *np;
-				numdisks++;
-			}
-
-			/* Don't free the individual pointers, since they're
-			 * used as new dp->device entries.
-			 */
-			free(np0);
-		}
-	}
-
-	/* Step 3: open all the disks and set the rate to check at
-	 * appropriately.  Use "onumdisks" because numdisks changes within
-	 * the loop.
-	 */
-	onumdisks = numdisks;
-	for (dp = disks; dp < disks + onumdisks; dp++) {
-		if (strcmp(dp->device, "*") == 0) {
-			numdisks--;
-			continue;
-		}
-
-		if ((dp->fd = open(dp->device, O_RDONLY)) < 0) {
-			syslog(LOG_NOTICE, "open %s failed: %m", dp->device);
-			numdisks--;
-			continue;
-		}
-
-		dp->errors = 0;
-
-		/*
-		 * Set the rate appropriately.  We always read 64KB blocks,
-		 * at a rate of 1 block per n seconds, where we adjust n to
-		 * make the overall rate close to what the user specified.
-		 */
-		if (dp->size < 0)
-			getdisksize(dp);
-		if (dp->rate < 0)
-			dp->rate = dp->size / (dp->days * 86400);
-
-		if (dp->rate == 0)
-			/* paranoia, should never really happen */
-			dp->interval = READ_SIZE;
-		else
-			dp->interval = READ_SIZE / dp->rate;
-	}
-
-	if (numdisks == 0) {
-		syslog(LOG_NOTICE, "no disks usable");
-		exit(EXIT_FAILURE);
-	}
-
-	/* Add a final entry with dp->device == NULL to end the array. */
-	if ((disks = reallocf(disks,
-	    (onumdisks + 1) * sizeof (*disks))) == NULL) {
-		syslog(LOG_NOTICE, "reallocf failure: %m");
-		exit(EXIT_FAILURE);
-	}
-	disks[onumdisks].device = NULL;
-
-	return (disks);
-}
-
-/*
- * Read in the specified disk's size from the disklabel.
- */
-void
-getdisksize(struct disk *dp) {
-	struct disklabel label;
-
-	if (ioctl(dp->fd, DIOCGDINFO, &label) < 0) {
-		syslog(LOG_NOTICE, "DIOCGDINFO on %s failed: %m",
-		    dp->device);
-		exit(EXIT_FAILURE);
-	}
-
-	dp->secsize = label.d_secsize;
-	dp->size = (off_t)label.d_secperunit * label.d_secsize;
-
-	if (label.d_secsize != 512)
-		syslog(LOG_NOTICE,
-		    "%s has %d byte sectors, may cause minor problems",
-		    dp->device, label.d_secsize);
-}
-
-off_t
-dseek(struct disk *dp, off_t offset, int whence) {
-	off_t n;
-
-	if ((n = lseek(dp->fd, offset, whence)) == -1) {
-		syslog(LOG_NOTICE, "seek failure on %s: %m", dp->device);
-		close(dp->fd);
-		dp->fd = -1;
-	}
-	return (n);
-}
-
-/*
- * Attempt to get a list of all disk names using the `kern.disks' sysctl
- * variable.  An NULL terminated list of pointers to these disks' pathnames
- * is returned.
- */
-char **
-getdisknames(char **skip, int numskip) {
-	char *string, *field;
-	size_t size, numdisks;
-	char **disks;
-	int i;
-
-	if (sysctlbyname("kern.disks", NULL, &size, NULL, 0) != 0 &&
-	    errno != ENOMEM) {
-		syslog(LOG_NOTICE, "sysctl kern.disks failure: %m");
-		exit(EXIT_FAILURE);
-	}
-	if ((string = malloc(size)) == NULL) {
-		syslog(LOG_NOTICE, "malloc failure: %m");
-		exit(EXIT_FAILURE);
-	}
-	if (sysctlbyname("kern.disks", string, &size, NULL, 0) != 0) {
-		syslog(LOG_NOTICE, "sysctl kern.disks failure: %m");
-		exit(EXIT_FAILURE);
-	}
-
-	disks = NULL;
-	numdisks = 0;
-	while ((field = strsep(&string, " ")) != NULL) {
-		/* check for disks we ignore */
-		for (i = 0; i < numskip; i++)
-			if (strncmp(field, skip[i], strlen(skip[i])) == 0)
-				break;
-		if (i < numskip)
-			continue;
-
-		if ((disks = reallocf(disks,
-		  (numdisks + 1) * sizeof (*disks))) == NULL) {
-			syslog(LOG_NOTICE, "reallocf failure: %m");
-			exit(EXIT_FAILURE);
-		}
-		if (asprintf(&disks[numdisks],
-		  "%s%s", _PATH_DEV, field) < 0) {
-			syslog(LOG_NOTICE, "asprintf failure: %m");
-			exit(EXIT_FAILURE);
-		}
-		numdisks++;
-	}
-
-	if ((disks = reallocf(disks,
-	  (numdisks + 1) * sizeof (*disks))) == NULL) {
-		syslog(LOG_NOTICE, "strdup failure: %m");
-		exit(EXIT_FAILURE);
-	}
-	disks[numdisks] = NULL;
-
-	free(string);
-	return (disks);
-}
-
-void
-sighup(int sig) {
-
-	sig = sig;
-	got_sighup = 1;
-}
-
-void
-sigterm(int sig) {
-
-	sig = sig;
-	got_sigterm = 1;
-}
-
-void
-usage(void) {
-
-	fprintf(stderr,
-	    "usage: diskcheckd [-d] [-f conf_file] [-o save_file]\n");
-	exit(EXIT_FAILURE);
-}