[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 1.9 2000/01/26 11:38:08 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;
		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[] =
a2c9bd28	43	"$Id: optr.c,v 1.9 2000/01/26 11:38:08 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;
1227625a SP	331	deltat = tstart_writing - tnow +
	332	(1.0 * (tnow - tstart_writing))
	333	/ blockswritten * tapesize;
	334	msg("%3.2f%% done, finished in %d:%02d\n",
	335	(blockswritten * 100.0) / tapesize,
	336	deltat / 3600, (deltat % 3600) / 60);
	337	}
	338	}
	339
	340	void
ddd2ef55	341	#ifdef __STDC__
1227625a SP	342	msg(const char *fmt, ...)
	343	#else
	344	msg(fmt, va_alist)
	345	char *fmt;
	346	va_dcl
	347	#endif
	348	{
	349	va_list ap;
	350
	351	(void) fprintf(stderr," DUMP: ");
	352	#ifdef TDEBUG
	353	(void) fprintf(stderr, "pid=%d ", getpid());
	354	#endif
ddd2ef55	355	#ifdef __STDC__
1227625a SP	356	va_start(ap, fmt);
	357	#else
	358	va_start(ap);
	359	#endif
	360	(void) vfprintf(stderr, fmt, ap);
3072400e	361	va_end(ap);
1227625a SP	362	(void) fflush(stdout);
1227625a SP	363	(void) fflush(stderr);
3072400e SP	364	#ifdef __STDC__
	365	va_start(ap, fmt);
	366	#else
	367	va_start(ap);
	368	#endif
ddd2ef55	369	(void) vsnprintf(lastmsg, sizeof(lastmsg), fmt, ap);
1227625a SP	370	va_end(ap);
	371	}
	372
	373	void
ddd2ef55	374	#ifdef __STDC__
1227625a SP	375	msgtail(const char *fmt, ...)
	376	#else
	377	msgtail(fmt, va_alist)
	378	char *fmt;
	379	va_dcl
	380	#endif
	381	{
	382	va_list ap;
ddd2ef55	383	#ifdef __STDC__
1227625a SP	384	va_start(ap, fmt);
	385	#else
	386	va_start(ap);
	387	#endif
	388	(void) vfprintf(stderr, fmt, ap);
	389	va_end(ap);
	390	}
	391
	392	void
ddd2ef55	393	#ifdef __STDC__
1227625a SP	394	quit(const char *fmt, ...)
	395	#else
	396	quit(fmt, va_alist)
	397	char *fmt;
	398	va_dcl
	399	#endif
	400	{
	401	va_list ap;
	402
	403	(void) fprintf(stderr," DUMP: ");
	404	#ifdef TDEBUG
	405	(void) fprintf(stderr, "pid=%d ", getpid());
	406	#endif
ddd2ef55	407	#ifdef __STDC__
1227625a SP	408	va_start(ap, fmt);
	409	#else
	410	va_start(ap);
	411	#endif
	412	(void) vfprintf(stderr, fmt, ap);
	413	va_end(ap);
	414	(void) fflush(stdout);
	415	(void) fflush(stderr);
	416	dumpabort(0);
	417	}
	418
	419	/*
	420	* Tell the operator what has to be done;
	421	* we don't actually do it
	422	*/
	423
ddd2ef55 SP	424	static struct fstab *
ddd2ef55 SP	425	allocfsent(struct fstab *fs)
1227625a SP	426	{
	427	register struct fstab *new;
	428
	429	new = (struct fstab )malloc(sizeof (fs));
a2c9bd28 SP	430	if (new == NULL)
	431	quit("%s\n", strerror(errno));
	432	if (strlen(fs->fs_file) > 1 && fs->fs_file[strlen(fs->fs_file) - 1] == '/')
	433	fs->fs_file[strlen(fs->fs_file) - 1] = '\0';
	434	if ((new->fs_file = strdup(fs->fs_file)) == NULL \|\|
1227625a SP	435	(new->fs_type = strdup(fs->fs_type)) == NULL \|\|
	436	(new->fs_spec = strdup(fs->fs_spec)) == NULL)
	437	quit("%s\n", strerror(errno));
	438	new->fs_passno = fs->fs_passno;
	439	new->fs_freq = fs->fs_freq;
	440	return (new);
	441	}
	442
	443	struct pfstab {
	444	struct pfstab *pf_next;
	445	struct fstab *pf_fstab;
	446	};
	447
	448	static struct pfstab *table;
	449
	450	void
ddd2ef55	451	getfstab(void)
1227625a SP	452	{
	453	register struct fstab *fs;
	454	register struct pfstab *pf;
	455
	456	if (setfsent() == 0) {
	457	msg("Can't open %s for dump table information: %s\n",
	458	_PATH_FSTAB, strerror(errno));
	459	return;
	460	}
	461	while ((fs = getfsent()) != NULL) {
	462	if (strcmp(fs->fs_type, FSTAB_RW) &&
	463	strcmp(fs->fs_type, FSTAB_RO) &&
	464	strcmp(fs->fs_type, FSTAB_RQ))
	465	continue;
	466	fs = allocfsent(fs);
	467	if ((pf = (struct pfstab )malloc(sizeof (pf))) == NULL)
	468	quit("%s\n", strerror(errno));
	469	pf->pf_fstab = fs;
	470	pf->pf_next = table;
	471	table = pf;
	472	}
	473	(void) endfsent();
	474	}
	475
	476	/*
	477	* Search in the fstab for a file name.
	478	* This file name can be either the special or the path file name.
	479	*
	480	* The entries in the fstab are the BLOCK special names, not the
	481	* character special names.
	482	* The caller of fstabsearch assures that the character device
	483	* is dumped (that is much faster)
	484	*
	485	* The file name can omit the leading '/'.
	486	*/
	487	struct fstab *
ddd2ef55	488	fstabsearch(const char *key)
1227625a SP	489	{
	490	register struct pfstab *pf;
	491	register struct fstab *fs;
	492	char *rn;
	493
	494	for (pf = table; pf != NULL; pf = pf->pf_next) {
	495	fs = pf->pf_fstab;
	496	if (strcmp(fs->fs_file, key) == 0 \|\|
	497	strcmp(fs->fs_spec, key) == 0)
	498	return (fs);
	499	rn = rawname(fs->fs_spec);
	500	if (rn != NULL && strcmp(rn, key) == 0)
	501	return (fs);
	502	if (key[0] != '/') {
	503	if (*fs->fs_spec == '/' &&
	504	strcmp(fs->fs_spec + 1, key) == 0)
	505	return (fs);
	506	if (*fs->fs_file == '/' &&
	507	strcmp(fs->fs_file + 1, key) == 0)
	508	return (fs);
	509	}
	510	}
	511	return (NULL);
	512	}
	513
	514	#ifdef __linux__
	515	struct fstab *
ddd2ef55	516	fstabsearchdir(const char key, char directory)
1227625a SP	517	{
	518	register struct pfstab *pf;
	519	register struct fstab *fs;
	520	register struct fstab *found_fs = NULL;
	521	unsigned int size = 0;
8d4197bb SP	522	struct stat buf;
	523
	524	if (stat(key, &buf) == 0 && S_ISBLK(buf.st_mode))
	525	return NULL;
1227625a SP	526
	527	for (pf = table; pf != NULL; pf = pf->pf_next) {
	528	fs = pf->pf_fstab;
	529	if (strlen(fs->fs_file) > size &&
	530	strlen(key) > strlen(fs->fs_file) + 2 &&
	531	strncmp(fs->fs_file, key, strlen(fs->fs_file)) == 0 &&
	532	(key[strlen(fs->fs_file)] == '/' \|\|
	533	fs->fs_file[strlen(fs->fs_file) - 1] == '/')) {
	534	found_fs = fs;
	535	size = strlen(fs->fs_file);
	536	}
	537	}
	538	if (found_fs != NULL) {
	539	/*
	540	* Ok, we have found a fstab entry which matches the argument
	541	* We have to split the argument name into:
	542	* - a device name (from the fstab entry)
	543	* - a directory name on this device
	544	*/
	545	strcpy(directory, key + size);
	546	}
	547	return(found_fs);
	548	}
	549	#endif
	550
	551	/*
	552	* Tell the operator what to do
	553	*/
	554	void
ddd2ef55	555	lastdump(char arg) /* w ==> just what to do; W ==> most recent dumps */
1227625a SP	556	{
	557	register int i;
	558	register struct fstab *dt;
8d4197bb	559	register struct dumpdates *dtwalk=NULL;
1227625a SP	560	char lastname, date;
	561	int dumpme;
	562	time_t tnow;
	563
	564	(void) time(&tnow);
	565	getfstab(); /* /etc/fstab input */
8d4197bb SP	566	initdumptimes(0); /* dumpdates input */
	567	if (ddatev != NULL) {
	568	qsort((char ) ddatev, nddates, sizeof(struct dumpdates ), datesort);
	569
	570	if (arg == 'w')
	571	(void) printf("Dump these file systems:\n");
	572	else
	573	(void) printf("Last dump(s) done (Dump '>' file systems):\n");
	574	lastname = "??";
	575	ITITERATE(i, dtwalk) {
	576	if (strncmp(lastname, dtwalk->dd_name,
	577	sizeof(dtwalk->dd_name)) == 0)
	578	continue;
	579	date = (char *)ctime(&dtwalk->dd_ddate);
	580	date[16] = '\0'; /* blast away seconds and year */
	581	lastname = dtwalk->dd_name;
	582	dt = fstabsearch(dtwalk->dd_name);
	583	dumpme = (dt != NULL &&
	584	dt->fs_freq != 0 &&
	585	dtwalk->dd_ddate < tnow - (dt->fs_freq * 86400));
	586	if (arg != 'w' \|\| dumpme)
	587	(void) printf(
	588	"%c %8s\t(%6s) Last dump: Level %c, Date %s\n",
	589	dumpme && (arg != 'w') ? '>' : ' ',
	590	dtwalk->dd_name,
	591	dt ? dt->fs_file : "",
	592	dtwalk->dd_level,
	593	date);
	594	}
1227625a SP	595	}
	596	}
	597
	598	int
ddd2ef55	599	datesort(const void a1, const void a2)
1227625a SP	600	{
	601	struct dumpdates d1 = (struct dumpdates **)a1;
	602	struct dumpdates d2 = (struct dumpdates **)a2;
	603	int diff;
	604
	605	diff = strncmp(d1->dd_name, d2->dd_name, sizeof(d1->dd_name));
	606	if (diff == 0)
	607	return (d2->dd_ddate - d1->dd_ddate);
	608	return (diff);
	609	}