[dump.git] / dump / optr.c

/*
 *	Ported to Linux's Second Extended File System as part of the
 *	dump and restore backup suit
 *	Remy Card <card@Linux.EU.Org>, 1994-1997
 *	Stelian Pop <pop@cybercable.fr>, 1999-2000
 */

/*-
 * Copyright (c) 1980, 1988, 1993
 *	The Regents of the University of California.  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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
 */

#ifndef lint
static const char rcsid[] =
	"$Id: optr.c,v 1.10 2000/02/10 09:42:32 stelian Exp $";
#endif /* not lint */

#include <sys/param.h>
#include <sys/wait.h>
#include <sys/time.h>

#include <errno.h>
#include <fstab.h>
#include <grp.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <unistd.h>
#include <utmp.h>
#include <sys/stat.h>

#ifdef __linux__
#include <linux/ext2_fs.h>
#include <ext2fs/ext2fs.h>
#include <bsdcompat.h>
#include <signal.h>
#endif

#include "dump.h"
#include "pathnames.h"

static	void alarmcatch __P((int));
int	datesort __P((const void *, const void *));
static	void sendmes __P((const char *, const char *));

/*
 *	Query the operator; This previously-fascist piece of code
 *	no longer requires an exact response.
 *	It is intended to protect dump aborting by inquisitive
 *	people banging on the console terminal to see what is
 *	happening which might cause dump to croak, destroying
 *	a large number of hours of work.
 *
 *	Every 2 minutes we reprint the message, alerting others
 *	that dump needs attention.
 */
static	int timeout;
static	const char *attnmessage;		/* attention message */

int
query(const char *question)
{
	char	replybuffer[64];
	int	back, errcount;
	FILE	*mytty;
	time_t	firstprompt, when_answered;

#ifdef __linux__
	(void)time4(&(firstprompt));
#else
	(void)time((time_t *)&(firstprompt));
#endif

	if ((mytty = fopen(_PATH_TTY, "r")) == NULL)
		quit("fopen on %s fails: %s\n", _PATH_TTY, strerror(errno));
	attnmessage = question;
	timeout = 0;
	alarmcatch(0);
	back = -1;
	errcount = 0;
	do {
		if (fgets(replybuffer, 63, mytty) == NULL) {
			clearerr(mytty);
			if (++errcount > 30)	/* XXX	ugly */
				quit("excessive operator query failures\n");
		} else if (replybuffer[0] == 'y' || replybuffer[0] == 'Y') {
			back = 1;
		} else if (replybuffer[0] == 'n' || replybuffer[0] == 'N') {
			back = 0;
		} else {
			(void) fprintf(stderr,
			    "  DUMP: \"Yes\" or \"No\"?\n");
			(void) fprintf(stderr,
			    "  DUMP: %s: (\"yes\" or \"no\") ", question);
		}
	} while (back < 0);

	/*
	 *	Turn off the alarm, and reset the signal to trap out..
	 */
	(void) alarm(0);
	if (signal(SIGALRM, sig) == SIG_IGN)
		signal(SIGALRM, SIG_IGN);
	(void) fclose(mytty);
#ifdef __linux__
	(void)time4(&(when_answered));
#else
	(void)time((time_t *)&(when_answered));
#endif
	/*
	 * Adjust the base for time estimates to ignore time we spent waiting
	 * for operator input.
	 */
	if ((tstart_writing != 0) && (when_answered != (time_t)-1) && (firstprompt != (time_t)-1))
		tstart_writing += (when_answered - firstprompt);
	return(back);
}

char lastmsg[BUFSIZ];

/*
 *	Alert the console operator, and enable the alarm clock to
 *	sleep for 2 minutes in case nobody comes to satisfy dump
 */
static void
alarmcatch(int signo)
{
	int save_errno = errno;
	if (notify == 0) {
		if (timeout == 0)
			(void) fprintf(stderr,
			    "  DUMP: %s: (\"yes\" or \"no\") ",
			    attnmessage);
		else
			msgtail("\7\7");
	} else {
		if (timeout) {
			msgtail("\n");
			broadcast("");		/* just print last msg */
		}
		(void) fprintf(stderr,"  DUMP: %s: (\"yes\" or \"no\") ",
		    attnmessage);
	}
	signal(SIGALRM, alarmcatch);
	(void) alarm(120);
	timeout = 1;
	errno = save_errno;
}

/*
 *	Here if an inquisitive operator interrupts the dump program
 */
void
interrupt(int signo)
{
	msg("Interrupt received.\n");
	if (query("Do you want to abort dump?"))
		dumpabort(0);
}

/*
 *	The following variables and routines manage alerting
 *	operators to the status of dump.
 *	This works much like wall(1) does.
 */
struct	group *gp;

/*
 *	Get the names from the group entry "operator" to notify.
 */
void
set_operators(void)
{
	if (!notify)		/*not going to notify*/
		return;
	gp = getgrnam(OPGRENT);
	(void) endgrent();
	if (gp == NULL) {
		msg("No group entry for %s.\n", OPGRENT);
		notify = 0;
		return;
	}
}

struct tm *localclock;

/*
 *	We fork a child to do the actual broadcasting, so
 *	that the process control groups are not messed up
 */
void
broadcast(const char *message)
{
	time_t		clock;
	FILE	*f_utmp;
	struct	utmp	utmp;
	char	**np;
	int	pid, s;

	if (!notify || gp == NULL)
		return;

	switch (pid = fork()) {
	case -1:
		return;
	case 0:
		break;
	default:
		while (wait(&s) != pid)
			continue;
		return;
	}

	clock = time((time_t *)0);
	localclock = localtime(&clock);

	if ((f_utmp = fopen(_PATH_UTMP, "r")) == NULL) {
		msg("Cannot open %s: %s\n", _PATH_UTMP, strerror(errno));
		return;
	}

	while (!feof(f_utmp)) {
		if (fread((char *) &utmp, sizeof (struct utmp), 1, f_utmp) != 1)
			break;
		if (utmp.ut_name[0] == 0)
			continue;
		for (np = gp->gr_mem; *np; np++) {
			if (strncmp(*np, utmp.ut_name, sizeof(utmp.ut_name)) != 0)
				continue;
			/*
			 *	Do not send messages to operators on dialups
			 */
			if (strncmp(utmp.ut_line, DIALUP, strlen(DIALUP)) == 0)
				continue;
#ifdef DEBUG
			msg("Message to %s at %s\n", *np, utmp.ut_line);
#endif
			sendmes(utmp.ut_line, message);
		}
	}
	(void) fclose(f_utmp);
	Exit(0);	/* the wait in this same routine will catch this */
	/* NOTREACHED */
}

static void
sendmes(const char *tty, const char *message)
{
	char t[MAXPATHLEN], buf[BUFSIZ];
	register const char *cp;
	int lmsg = 1;
	FILE *f_tty;

	(void) strcpy(t, _PATH_DEV);
	(void) strncat(t, tty, sizeof t - strlen(_PATH_DEV) - 1);

	if ((f_tty = fopen(t, "w")) != NULL) {
		setbuf(f_tty, buf);
		(void) fprintf(f_tty,
		    "\n\
\7\7\7Message from the dump program to all operators at %d:%02d ...\r\n\n\
DUMP: NEEDS ATTENTION: ",
		    localclock->tm_hour, localclock->tm_min);
		for (cp = lastmsg; ; cp++) {
			if (*cp == '\0') {
				if (lmsg) {
					cp = message;
					if (!(cp && *cp != '\0'))
						break;
					lmsg = 0;
				} else
					break;
			}
			if (*cp == '\n')
				(void) putc('\r', f_tty);
			(void) putc(*cp, f_tty);
		}
		(void) fclose(f_tty);
	}
}

/*
 *	print out an estimate of the amount of time left to do the dump
 */

time_t	tschedule = 0;

void
timeest(void)
{
	time_t	tnow, deltat;

#ifdef __linux__
	(void) time4(&tnow);
#else
	(void) time((time_t *) &tnow);
#endif
	if (tnow >= tschedule) {
		tschedule = tnow + 300;
		if (blockswritten < 500)
			return;
		if (blockswritten > tapesize)
			tapesize = blockswritten;
		deltat = tstart_writing - tnow +
			(1.0 * (tnow - tstart_writing))
			/ blockswritten * tapesize;
		msg("%3.2f%% done, finished in %d:%02d\n",
			(blockswritten * 100.0) / tapesize,
			deltat / 3600, (deltat % 3600) / 60);
	}
}

void
#ifdef __STDC__
msg(const char *fmt, ...)
#else
msg(fmt, va_alist)
	char *fmt;
	va_dcl
#endif
{
	va_list ap;

	(void) fprintf(stderr,"  DUMP: ");
#ifdef TDEBUG
	(void) fprintf(stderr, "pid=%d ", getpid());
#endif
#ifdef __STDC__
	va_start(ap, fmt);
#else
	va_start(ap);
#endif
	(void) vfprintf(stderr, fmt, ap);
	va_end(ap);
	(void) fflush(stdout);
	(void) fflush(stderr);
#ifdef __STDC__
	va_start(ap, fmt);
#else
	va_start(ap);
#endif
	(void) vsnprintf(lastmsg, sizeof(lastmsg), fmt, ap);
	va_end(ap);
}

void
#ifdef __STDC__
msgtail(const char *fmt, ...)
#else
msgtail(fmt, va_alist)
	char *fmt;
	va_dcl
#endif
{
	va_list ap;
#ifdef __STDC__
	va_start(ap, fmt);
#else
	va_start(ap);
#endif
	(void) vfprintf(stderr, fmt, ap);
	va_end(ap);
}

void
#ifdef __STDC__
quit(const char *fmt, ...)
#else
quit(fmt, va_alist)
	char *fmt;
	va_dcl
#endif
{
	va_list ap;

	(void) fprintf(stderr,"  DUMP: ");
#ifdef TDEBUG
	(void) fprintf(stderr, "pid=%d ", getpid());
#endif
#ifdef __STDC__
	va_start(ap, fmt);
#else
	va_start(ap);
#endif
	(void) vfprintf(stderr, fmt, ap);
	va_end(ap);
	(void) fflush(stdout);
	(void) fflush(stderr);
	dumpabort(0);
}

/*
 *	Tell the operator what has to be done;
 *	we don't actually do it
 */

static struct fstab *
allocfsent(struct fstab *fs)
{
	register struct fstab *new;

	new = (struct fstab *)malloc(sizeof (*fs));
	if (new == NULL)
		quit("%s\n", strerror(errno));
	if (strlen(fs->fs_file) > 1 && fs->fs_file[strlen(fs->fs_file) - 1] == '/')
		fs->fs_file[strlen(fs->fs_file) - 1] = '\0';
	if ((new->fs_file = strdup(fs->fs_file)) == NULL ||
	    (new->fs_type = strdup(fs->fs_type)) == NULL ||
	    (new->fs_spec = strdup(fs->fs_spec)) == NULL)
		quit("%s\n", strerror(errno));
	new->fs_passno = fs->fs_passno;
	new->fs_freq = fs->fs_freq;
	return (new);
}

struct	pfstab {
	struct	pfstab *pf_next;
	struct	fstab *pf_fstab;
};

static	struct pfstab *table;

void
getfstab(void)
{
	register struct fstab *fs;
	register struct pfstab *pf;

	if (setfsent() == 0) {
		msg("Can't open %s for dump table information: %s\n",
		    _PATH_FSTAB, strerror(errno));
		return;
	}
	while ((fs = getfsent()) != NULL) {
		if (strcmp(fs->fs_type, FSTAB_RW) &&
		    strcmp(fs->fs_type, FSTAB_RO) &&
		    strcmp(fs->fs_type, FSTAB_RQ))
			continue;
		fs = allocfsent(fs);
		if ((pf = (struct pfstab *)malloc(sizeof (*pf))) == NULL)
			quit("%s\n", strerror(errno));
		pf->pf_fstab = fs;
		pf->pf_next = table;
		table = pf;
	}
	(void) endfsent();
}

/*
 * Search in the fstab for a file name.
 * This file name can be either the special or the path file name.
 *
 * The entries in the fstab are the BLOCK special names, not the
 * character special names.
 * The caller of fstabsearch assures that the character device
 * is dumped (that is much faster)
 *
 * The file name can omit the leading '/'.
 */
struct fstab *
fstabsearch(const char *key)
{
	register struct pfstab *pf;
	register struct fstab *fs;
	char *rn;

	for (pf = table; pf != NULL; pf = pf->pf_next) {
		fs = pf->pf_fstab;
		if (strcmp(fs->fs_file, key) == 0 ||
		    strcmp(fs->fs_spec, key) == 0)
			return (fs);
		rn = rawname(fs->fs_spec);
		if (rn != NULL && strcmp(rn, key) == 0)
			return (fs);
		if (key[0] != '/') {
			if (*fs->fs_spec == '/' &&
			    strcmp(fs->fs_spec + 1, key) == 0)
				return (fs);
			if (*fs->fs_file == '/' &&
			    strcmp(fs->fs_file + 1, key) == 0)
				return (fs);
		}
	}
	return (NULL);
}

#ifdef	__linux__
struct fstab *
fstabsearchdir(const char *key, char *directory)
{
	register struct pfstab *pf;
	register struct fstab *fs;
	register struct fstab *found_fs = NULL;
	unsigned int size = 0;
	struct stat buf;

	if (stat(key, &buf) == 0 && S_ISBLK(buf.st_mode))
		return NULL;

	for (pf = table; pf != NULL; pf = pf->pf_next) {
		fs = pf->pf_fstab;
		if (strlen(fs->fs_file) > size &&
		    strlen(key) > strlen(fs->fs_file) + 2 &&
		    strncmp(fs->fs_file, key, strlen(fs->fs_file)) == 0 &&
		    (key[strlen(fs->fs_file)] == '/' ||
		     fs->fs_file[strlen(fs->fs_file) - 1] == '/')) {
			found_fs = fs;
			size = strlen(fs->fs_file);
		}
	}
	if (found_fs != NULL) {
		/*
		 * Ok, we have found a fstab entry which matches the argument
		 * We have to split the argument name into:
		 * - a device name (from the fstab entry)
		 * - a directory name on this device
		 */
		strcpy(directory, key + size);
	}
	return(found_fs);
}
#endif

/*
 *	Tell the operator what to do
 */
void
lastdump(char arg) /* w ==> just what to do; W ==> most recent dumps */
{
	register int i;
	register struct fstab *dt;
	register struct dumpdates *dtwalk=NULL;
	char *lastname, *date;
	int dumpme;
	time_t tnow;

	(void) time(&tnow);
	getfstab();		/* /etc/fstab input */
	initdumptimes(0);	/* dumpdates input */
	if (ddatev != NULL) {
		qsort((char *) ddatev, nddates, sizeof(struct dumpdates *), datesort);

		if (arg == 'w')
			(void) printf("Dump these file systems:\n");
		else
			(void) printf("Last dump(s) done (Dump '>' file systems):\n");
		lastname = "??";
		ITITERATE(i, dtwalk) {
			if (strncmp(lastname, dtwalk->dd_name,
		    		sizeof(dtwalk->dd_name)) == 0)
				continue;
			date = (char *)ctime(&dtwalk->dd_ddate);
			date[16] = '\0';	/* blast away seconds and year */
			lastname = dtwalk->dd_name;
			dt = fstabsearch(dtwalk->dd_name);
			dumpme = (dt != NULL &&
		    		dt->fs_freq != 0 &&
		    		dtwalk->dd_ddate < tnow - (dt->fs_freq * 86400));
			if (arg != 'w' || dumpme)
				(void) printf(
			    		"%c %8s\t(%6s) Last dump: Level %c, Date %s\n",
			    		dumpme && (arg != 'w') ? '>' : ' ',
			    		dtwalk->dd_name,
			    		dt ? dt->fs_file : "",
			    		dtwalk->dd_level,
			   		date);
		}
	}
}

int
datesort(const void *a1, const void *a2)
{
	struct dumpdates *d1 = *(struct dumpdates **)a1;
	struct dumpdates *d2 = *(struct dumpdates **)a2;
	int diff;

	diff = strncmp(d1->dd_name, d2->dd_name, sizeof(d1->dd_name));
	if (diff == 0)
		return (d2->dd_ddate - d1->dd_ddate);
	return (diff);
}
Commit	Line	Data
1227625a SP	1	/*
	2	* Ported to Linux's Second Extended File System as part of the
	3	* dump and restore backup suit
b45f51d6	4	* Remy Card <card@Linux.EU.Org>, 1994-1997
ebcbe7f6	5	* Stelian Pop <pop@cybercable.fr>, 1999-2000
1227625a SP	6	*/
	7
	8	/*-
	9	* Copyright (c) 1980, 1988, 1993
	10	* The Regents of the University of California. All rights reserved.
	11	*
	12	* Redistribution and use in source and binary forms, with or without
	13	* modification, are permitted provided that the following conditions
	14	* are met:
	15	* 1. Redistributions of source code must retain the above copyright
	16	* notice, this list of conditions and the following disclaimer.
	17	* 2. Redistributions in binary form must reproduce the above copyright
	18	* notice, this list of conditions and the following disclaimer in the
	19	* documentation and/or other materials provided with the distribution.
	20	* 3. All advertising materials mentioning features or use of this software
	21	* must display the following acknowledgement:
	22	* This product includes software developed by the University of
	23	* California, Berkeley and its contributors.
	24	* 4. Neither the name of the University nor the names of its contributors
	25	* may be used to endorse or promote products derived from this software
	26	* without specific prior written permission.
	27	*
	28	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	29	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	30	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	31	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	32	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	33	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	34	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	35	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	36	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	37	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	38	* SUCH DAMAGE.
	39	*/
	40
df9ae507 SP	41	#ifndef lint
df9ae507 SP	42	static const char rcsid[] =
8eb05297	43	"$Id: optr.c,v 1.10 2000/02/10 09:42:32 stelian Exp $";
df9ae507 SP	44	#endif /* not lint */
df9ae507 SP	45
1227625a SP	46	#include <sys/param.h>
	47	#include <sys/wait.h>
	48	#include <sys/time.h>
	49
	50	#include <errno.h>
	51	#include <fstab.h>
	52	#include <grp.h>
1227625a	53	#include <stdio.h>
1227625a SP	54	#include <stdlib.h>
	55	#include <string.h>
	56	#include <stdarg.h>
1227625a	57	#include <unistd.h>
1227625a	58	#include <utmp.h>
8d4197bb	59	#include <sys/stat.h>
1227625a SP	60
	61	#ifdef __linux__
	62	#include <linux/ext2_fs.h>
	63	#include <ext2fs/ext2fs.h>
	64	#include <bsdcompat.h>
b45f51d6	65	#include <signal.h>
1227625a SP	66	#endif
	67
	68	#include "dump.h"
	69	#include "pathnames.h"
	70
ddd2ef55	71	static void alarmcatch __P((int));
1227625a	72	int datesort __P((const void , const void ));
ddd2ef55	73	static void sendmes __P((const char , const char ));
1227625a SP	74
	75	/*
	76	* Query the operator; This previously-fascist piece of code
	77	* no longer requires an exact response.
	78	* It is intended to protect dump aborting by inquisitive
	79	* people banging on the console terminal to see what is
	80	* happening which might cause dump to croak, destroying
	81	* a large number of hours of work.
	82	*
	83	* Every 2 minutes we reprint the message, alerting others
	84	* that dump needs attention.
	85	*/
	86	static int timeout;
ddd2ef55	87	static const char attnmessage; / attention message */
1227625a SP	88
1227625a SP	89	int
ddd2ef55	90	query(const char *question)
1227625a SP	91	{
	92	char replybuffer[64];
	93	int back, errcount;
	94	FILE *mytty;
ddd2ef55 SP	95	time_t firstprompt, when_answered;
ddd2ef55 SP	96
8d4197bb SP	97	#ifdef __linux__
	98	(void)time4(&(firstprompt));
	99	#else
	100	(void)time((time_t *)&(firstprompt));
	101	#endif
1227625a SP	102
	103	if ((mytty = fopen(_PATH_TTY, "r")) == NULL)
	104	quit("fopen on %s fails: %s\n", _PATH_TTY, strerror(errno));
	105	attnmessage = question;
	106	timeout = 0;
ddd2ef55	107	alarmcatch(0);
1227625a SP	108	back = -1;
	109	errcount = 0;
	110	do {
	111	if (fgets(replybuffer, 63, mytty) == NULL) {
	112	clearerr(mytty);
	113	if (++errcount > 30) /* XXX ugly */
	114	quit("excessive operator query failures\n");
	115	} else if (replybuffer[0] == 'y' \|\| replybuffer[0] == 'Y') {
	116	back = 1;
	117	} else if (replybuffer[0] == 'n' \|\| replybuffer[0] == 'N') {
	118	back = 0;
	119	} else {
	120	(void) fprintf(stderr,
	121	" DUMP: \"Yes\" or \"No\"?\n");
	122	(void) fprintf(stderr,
	123	" DUMP: %s: (\"yes\" or \"no\") ", question);
	124	}
	125	} while (back < 0);
	126
	127	/*
	128	* Turn off the alarm, and reset the signal to trap out..
	129	*/
	130	(void) alarm(0);
	131	if (signal(SIGALRM, sig) == SIG_IGN)
	132	signal(SIGALRM, SIG_IGN);
	133	(void) fclose(mytty);
8d4197bb SP	134	#ifdef __linux__
	135	(void)time4(&(when_answered));
	136	#else
	137	(void)time((time_t *)&(when_answered));
	138	#endif
ddd2ef55 SP	139	/*
	140	* Adjust the base for time estimates to ignore time we spent waiting
	141	* for operator input.
	142	*/
8d4197bb	143	if ((tstart_writing != 0) && (when_answered != (time_t)-1) && (firstprompt != (time_t)-1))
ddd2ef55	144	tstart_writing += (when_answered - firstprompt);
1227625a SP	145	return(back);
	146	}
	147
ddd2ef55	148	char lastmsg[BUFSIZ];
1227625a SP	149
	150	/*
	151	* Alert the console operator, and enable the alarm clock to
	152	* sleep for 2 minutes in case nobody comes to satisfy dump
	153	*/
ddd2ef55 SP	154	static void
ddd2ef55 SP	155	alarmcatch(int signo)
1227625a	156	{
ddd2ef55	157	int save_errno = errno;
1227625a SP	158	if (notify == 0) {
	159	if (timeout == 0)
	160	(void) fprintf(stderr,
	161	" DUMP: %s: (\"yes\" or \"no\") ",
	162	attnmessage);
	163	else
	164	msgtail("\7\7");
	165	} else {
	166	if (timeout) {
	167	msgtail("\n");
	168	broadcast(""); /* just print last msg */
	169	}
	170	(void) fprintf(stderr," DUMP: %s: (\"yes\" or \"no\") ",
	171	attnmessage);
	172	}
	173	signal(SIGALRM, alarmcatch);
	174	(void) alarm(120);
	175	timeout = 1;
ddd2ef55	176	errno = save_errno;
1227625a SP	177	}
	178
	179	/*
	180	* Here if an inquisitive operator interrupts the dump program
	181	*/
	182	void
ddd2ef55	183	interrupt(int signo)
1227625a SP	184	{
	185	msg("Interrupt received.\n");
	186	if (query("Do you want to abort dump?"))
	187	dumpabort(0);
	188	}
	189
	190	/*
	191	* The following variables and routines manage alerting
	192	* operators to the status of dump.
	193	* This works much like wall(1) does.
	194	*/
	195	struct group *gp;
	196
	197	/*
	198	* Get the names from the group entry "operator" to notify.
b45f51d6	199	*/
1227625a	200	void
ddd2ef55	201	set_operators(void)
1227625a SP	202	{
	203	if (!notify) /not going to notify/
	204	return;
	205	gp = getgrnam(OPGRENT);
	206	(void) endgrent();
	207	if (gp == NULL) {
	208	msg("No group entry for %s.\n", OPGRENT);
	209	notify = 0;
	210	return;
	211	}
	212	}
	213
	214	struct tm *localclock;
	215
	216	/*
	217	* We fork a child to do the actual broadcasting, so
	218	* that the process control groups are not messed up
	219	*/
	220	void
ddd2ef55	221	broadcast(const char *message)
1227625a SP	222	{
	223	time_t clock;
	224	FILE *f_utmp;
	225	struct utmp utmp;
	226	char **np;
	227	int pid, s;
	228
	229	if (!notify \|\| gp == NULL)
	230	return;
	231
	232	switch (pid = fork()) {
	233	case -1:
	234	return;
	235	case 0:
	236	break;
	237	default:
	238	while (wait(&s) != pid)
	239	continue;
	240	return;
	241	}
	242
	243	clock = time((time_t *)0);
	244	localclock = localtime(&clock);
	245
	246	if ((f_utmp = fopen(_PATH_UTMP, "r")) == NULL) {
	247	msg("Cannot open %s: %s\n", _PATH_UTMP, strerror(errno));
	248	return;
	249	}
	250
	251	while (!feof(f_utmp)) {
	252	if (fread((char *) &utmp, sizeof (struct utmp), 1, f_utmp) != 1)
	253	break;
	254	if (utmp.ut_name[0] == 0)
	255	continue;
	256	for (np = gp->gr_mem; *np; np++) {
	257	if (strncmp(*np, utmp.ut_name, sizeof(utmp.ut_name)) != 0)
	258	continue;
	259	/*
	260	* Do not send messages to operators on dialups
	261	*/
	262	if (strncmp(utmp.ut_line, DIALUP, strlen(DIALUP)) == 0)
	263	continue;
	264	#ifdef DEBUG
	265	msg("Message to %s at %s\n", *np, utmp.ut_line);
	266	#endif
	267	sendmes(utmp.ut_line, message);
	268	}
	269	}
	270	(void) fclose(f_utmp);
	271	Exit(0); /* the wait in this same routine will catch this */
	272	/* NOTREACHED */
	273	}
	274
	275	static void
ddd2ef55	276	sendmes(const char tty, const char message)
1227625a	277	{
b45f51d6	278	char t[MAXPATHLEN], buf[BUFSIZ];
ddd2ef55	279	register const char *cp;
1227625a SP	280	int lmsg = 1;
	281	FILE *f_tty;
	282
	283	(void) strcpy(t, _PATH_DEV);
b45f51d6	284	(void) strncat(t, tty, sizeof t - strlen(_PATH_DEV) - 1);
1227625a SP	285
	286	if ((f_tty = fopen(t, "w")) != NULL) {
	287	setbuf(f_tty, buf);
	288	(void) fprintf(f_tty,
	289	"\n\
	290	\7\7\7Message from the dump program to all operators at %d:%02d ...\r\n\n\
	291	DUMP: NEEDS ATTENTION: ",
	292	localclock->tm_hour, localclock->tm_min);
	293	for (cp = lastmsg; ; cp++) {
	294	if (*cp == '\0') {
	295	if (lmsg) {
	296	cp = message;
ddd2ef55	297	if (!(cp && *cp != '\0'))
1227625a SP	298	break;
	299	lmsg = 0;
	300	} else
	301	break;
	302	}
	303	if (*cp == '\n')
	304	(void) putc('\r', f_tty);
	305	(void) putc(*cp, f_tty);
	306	}
	307	(void) fclose(f_tty);
	308	}
	309	}
	310
	311	/*
	312	* print out an estimate of the amount of time left to do the dump
	313	*/
	314
	315	time_t tschedule = 0;
	316
	317	void
ddd2ef55	318	timeest(void)
1227625a SP	319	{
	320	time_t tnow, deltat;
	321
8d4197bb SP	322	#ifdef __linux__
	323	(void) time4(&tnow);
	324	#else
1227625a	325	(void) time((time_t *) &tnow);
8d4197bb	326	#endif
1227625a SP	327	if (tnow >= tschedule) {
	328	tschedule = tnow + 300;
	329	if (blockswritten < 500)
b45f51d6	330	return;
8eb05297 SP	331	if (blockswritten > tapesize)
8eb05297 SP	332	tapesize = blockswritten;
1227625a SP	333	deltat = tstart_writing - tnow +
	334	(1.0 * (tnow - tstart_writing))
	335	/ blockswritten * tapesize;
	336	msg("%3.2f%% done, finished in %d:%02d\n",
	337	(blockswritten * 100.0) / tapesize,
	338	deltat / 3600, (deltat % 3600) / 60);
	339	}
	340	}
	341
	342	void
ddd2ef55	343	#ifdef __STDC__
1227625a SP	344	msg(const char *fmt, ...)
	345	#else
	346	msg(fmt, va_alist)
	347	char *fmt;
	348	va_dcl
	349	#endif
	350	{
	351	va_list ap;
	352
	353	(void) fprintf(stderr," DUMP: ");
	354	#ifdef TDEBUG
	355	(void) fprintf(stderr, "pid=%d ", getpid());
	356	#endif
ddd2ef55	357	#ifdef __STDC__
1227625a SP	358	va_start(ap, fmt);
	359	#else
	360	va_start(ap);
	361	#endif
	362	(void) vfprintf(stderr, fmt, ap);
3072400e	363	va_end(ap);
1227625a SP	364	(void) fflush(stdout);
1227625a SP	365	(void) fflush(stderr);
3072400e SP	366	#ifdef __STDC__
	367	va_start(ap, fmt);
	368	#else
	369	va_start(ap);
	370	#endif
ddd2ef55	371	(void) vsnprintf(lastmsg, sizeof(lastmsg), fmt, ap);
1227625a SP	372	va_end(ap);
	373	}
	374
	375	void
ddd2ef55	376	#ifdef __STDC__
1227625a SP	377	msgtail(const char *fmt, ...)
	378	#else
	379	msgtail(fmt, va_alist)
	380	char *fmt;
	381	va_dcl
	382	#endif
	383	{
	384	va_list ap;
ddd2ef55	385	#ifdef __STDC__
1227625a SP	386	va_start(ap, fmt);
	387	#else
	388	va_start(ap);
	389	#endif
	390	(void) vfprintf(stderr, fmt, ap);
	391	va_end(ap);
	392	}
	393
	394	void
ddd2ef55	395	#ifdef __STDC__
1227625a SP	396	quit(const char *fmt, ...)
	397	#else
	398	quit(fmt, va_alist)
	399	char *fmt;
	400	va_dcl
	401	#endif
	402	{
	403	va_list ap;
	404
	405	(void) fprintf(stderr," DUMP: ");
	406	#ifdef TDEBUG
	407	(void) fprintf(stderr, "pid=%d ", getpid());
	408	#endif
ddd2ef55	409	#ifdef __STDC__
1227625a SP	410	va_start(ap, fmt);
	411	#else
	412	va_start(ap);
	413	#endif
	414	(void) vfprintf(stderr, fmt, ap);
	415	va_end(ap);
	416	(void) fflush(stdout);
	417	(void) fflush(stderr);
	418	dumpabort(0);
	419	}
	420
	421	/*
	422	* Tell the operator what has to be done;
	423	* we don't actually do it
	424	*/
	425
ddd2ef55 SP	426	static struct fstab *
ddd2ef55 SP	427	allocfsent(struct fstab *fs)
1227625a SP	428	{
	429	register struct fstab *new;
	430
	431	new = (struct fstab )malloc(sizeof (fs));
a2c9bd28 SP	432	if (new == NULL)
	433	quit("%s\n", strerror(errno));
	434	if (strlen(fs->fs_file) > 1 && fs->fs_file[strlen(fs->fs_file) - 1] == '/')
	435	fs->fs_file[strlen(fs->fs_file) - 1] = '\0';
	436	if ((new->fs_file = strdup(fs->fs_file)) == NULL \|\|
1227625a SP	437	(new->fs_type = strdup(fs->fs_type)) == NULL \|\|
	438	(new->fs_spec = strdup(fs->fs_spec)) == NULL)
	439	quit("%s\n", strerror(errno));
	440	new->fs_passno = fs->fs_passno;
	441	new->fs_freq = fs->fs_freq;
	442	return (new);
	443	}
	444
	445	struct pfstab {
	446	struct pfstab *pf_next;
	447	struct fstab *pf_fstab;
	448	};
	449
	450	static struct pfstab *table;
	451
	452	void
ddd2ef55	453	getfstab(void)
1227625a SP	454	{
	455	register struct fstab *fs;
	456	register struct pfstab *pf;
	457
	458	if (setfsent() == 0) {
	459	msg("Can't open %s for dump table information: %s\n",
	460	_PATH_FSTAB, strerror(errno));
	461	return;
	462	}
	463	while ((fs = getfsent()) != NULL) {
	464	if (strcmp(fs->fs_type, FSTAB_RW) &&
	465	strcmp(fs->fs_type, FSTAB_RO) &&
	466	strcmp(fs->fs_type, FSTAB_RQ))
	467	continue;
	468	fs = allocfsent(fs);
	469	if ((pf = (struct pfstab )malloc(sizeof (pf))) == NULL)
	470	quit("%s\n", strerror(errno));
	471	pf->pf_fstab = fs;
	472	pf->pf_next = table;
	473	table = pf;
	474	}
	475	(void) endfsent();
	476	}
	477
	478	/*
	479	* Search in the fstab for a file name.
	480	* This file name can be either the special or the path file name.
	481	*
	482	* The entries in the fstab are the BLOCK special names, not the
	483	* character special names.
	484	* The caller of fstabsearch assures that the character device
	485	* is dumped (that is much faster)
	486	*
	487	* The file name can omit the leading '/'.
	488	*/
	489	struct fstab *
ddd2ef55	490	fstabsearch(const char *key)
1227625a SP	491	{
	492	register struct pfstab *pf;
	493	register struct fstab *fs;
	494	char *rn;
	495
	496	for (pf = table; pf != NULL; pf = pf->pf_next) {
	497	fs = pf->pf_fstab;
	498	if (strcmp(fs->fs_file, key) == 0 \|\|
	499	strcmp(fs->fs_spec, key) == 0)
	500	return (fs);
	501	rn = rawname(fs->fs_spec);
	502	if (rn != NULL && strcmp(rn, key) == 0)
	503	return (fs);
	504	if (key[0] != '/') {
	505	if (*fs->fs_spec == '/' &&
	506	strcmp(fs->fs_spec + 1, key) == 0)
	507	return (fs);
	508	if (*fs->fs_file == '/' &&
	509	strcmp(fs->fs_file + 1, key) == 0)
	510	return (fs);
	511	}
	512	}
	513	return (NULL);
	514	}
	515
	516	#ifdef __linux__
	517	struct fstab *
ddd2ef55	518	fstabsearchdir(const char key, char directory)
1227625a SP	519	{
	520	register struct pfstab *pf;
	521	register struct fstab *fs;
	522	register struct fstab *found_fs = NULL;
	523	unsigned int size = 0;
8d4197bb SP	524	struct stat buf;
	525
	526	if (stat(key, &buf) == 0 && S_ISBLK(buf.st_mode))
	527	return NULL;
1227625a SP	528
	529	for (pf = table; pf != NULL; pf = pf->pf_next) {
	530	fs = pf->pf_fstab;
	531	if (strlen(fs->fs_file) > size &&
	532	strlen(key) > strlen(fs->fs_file) + 2 &&
	533	strncmp(fs->fs_file, key, strlen(fs->fs_file)) == 0 &&
	534	(key[strlen(fs->fs_file)] == '/' \|\|
	535	fs->fs_file[strlen(fs->fs_file) - 1] == '/')) {
	536	found_fs = fs;
	537	size = strlen(fs->fs_file);
	538	}
	539	}
	540	if (found_fs != NULL) {
	541	/*
	542	* Ok, we have found a fstab entry which matches the argument
	543	* We have to split the argument name into:
	544	* - a device name (from the fstab entry)
	545	* - a directory name on this device
	546	*/
	547	strcpy(directory, key + size);
	548	}
	549	return(found_fs);
	550	}
	551	#endif
	552
	553	/*
	554	* Tell the operator what to do
	555	*/
	556	void
ddd2ef55	557	lastdump(char arg) /* w ==> just what to do; W ==> most recent dumps */
1227625a SP	558	{
	559	register int i;
	560	register struct fstab *dt;
8d4197bb	561	register struct dumpdates *dtwalk=NULL;
1227625a SP	562	char lastname, date;
	563	int dumpme;
	564	time_t tnow;
	565
	566	(void) time(&tnow);
	567	getfstab(); /* /etc/fstab input */
8d4197bb SP	568	initdumptimes(0); /* dumpdates input */
	569	if (ddatev != NULL) {
	570	qsort((char ) ddatev, nddates, sizeof(struct dumpdates ), datesort);
	571
	572	if (arg == 'w')
	573	(void) printf("Dump these file systems:\n");
	574	else
	575	(void) printf("Last dump(s) done (Dump '>' file systems):\n");
	576	lastname = "??";
	577	ITITERATE(i, dtwalk) {
	578	if (strncmp(lastname, dtwalk->dd_name,
	579	sizeof(dtwalk->dd_name)) == 0)
	580	continue;
	581	date = (char *)ctime(&dtwalk->dd_ddate);
	582	date[16] = '\0'; /* blast away seconds and year */
	583	lastname = dtwalk->dd_name;
	584	dt = fstabsearch(dtwalk->dd_name);
	585	dumpme = (dt != NULL &&
	586	dt->fs_freq != 0 &&
	587	dtwalk->dd_ddate < tnow - (dt->fs_freq * 86400));
	588	if (arg != 'w' \|\| dumpme)
	589	(void) printf(
	590	"%c %8s\t(%6s) Last dump: Level %c, Date %s\n",
	591	dumpme && (arg != 'w') ? '>' : ' ',
	592	dtwalk->dd_name,
	593	dt ? dt->fs_file : "",
	594	dtwalk->dd_level,
	595	date);
	596	}
1227625a SP	597	}
	598	}
	599
	600	int
ddd2ef55	601	datesort(const void a1, const void a2)
1227625a SP	602	{
	603	struct dumpdates d1 = (struct dumpdates **)a1;
	604	struct dumpdates d2 = (struct dumpdates **)a2;
	605	int diff;
	606
	607	diff = strncmp(d1->dd_name, d2->dd_name, sizeof(d1->dd_name));
	608	if (diff == 0)
	609	return (d2->dd_ddate - d1->dd_ddate);
	610	return (diff);
	611	}