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optr.c revision 1.1 
      1 /*-
      2  * Copyright (c) 1980, 1988 The Regents of the University of California.
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. All advertising materials mentioning features or use of this software
     14  *    must display the following acknowledgement:
     15  *	This product includes software developed by the University of
     16  *	California, Berkeley and its contributors.
     17  * 4. Neither the name of the University nor the names of its contributors
     18  *    may be used to endorse or promote products derived from this software
     19  *    without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  * SUCH DAMAGE.
     32  */
     33 
     34 #ifndef lint
     35 /* from: static char sccsid[] = "@(#)optr.c	5.14 (Berkeley) 7/16/92"; */
     36 static char *rcsid = "$Id: optr.c,v 1.1 1993/12/22 10:24:50 cgd Exp $";
     37 #endif /* not lint */
     38 
     39 #ifdef sunos
     40 #include <stdio.h>
     41 #include <ctype.h>
     42 #include <sys/param.h>
     43 #include <sys/wait.h>
     44 #include <sys/stat.h>
     45 #include <sys/time.h>
     46 #else
     47 #include <sys/param.h>
     48 #include <sys/wait.h>
     49 #include <stdio.h>
     50 #endif
     51 #include <signal.h>
     52 #include <time.h>
     53 #include <fstab.h>
     54 #include <grp.h>
     55 #include <utmp.h>
     56 #include <tzfile.h>
     57 #include <errno.h>
     58 #ifdef __STDC__
     59 #include <unistd.h>
     60 #include <stdlib.h>
     61 #include <string.h>
     62 #include <stdarg.h>
     63 #else
     64 #include <varargs.h>
     65 #endif
     66 #include "dump.h"
     67 #include "pathnames.h"
     68 
     69 static void alarmcatch();
     70 static void sendmes();
     71 
     72 /*
     73  *	Query the operator; This previously-fascist piece of code
     74  *	no longer requires an exact response.
     75  *	It is intended to protect dump aborting by inquisitive
     76  *	people banging on the console terminal to see what is
     77  *	happening which might cause dump to croak, destroying
     78  *	a large number of hours of work.
     79  *
     80  *	Every 2 minutes we reprint the message, alerting others
     81  *	that dump needs attention.
     82  */
     83 int	timeout;
     84 char	*attnmessage;		/* attention message */
     85 
     86 int
     87 query(question)
     88 	char	*question;
     89 {
     90 	char	replybuffer[64];
     91 	int	back, errcount;
     92 	FILE	*mytty;
     93 
     94 	if ((mytty = fopen(_PATH_TTY, "r")) == NULL)
     95 		quit("fopen on %s fails: %s\n", _PATH_TTY, strerror(errno));
     96 	attnmessage = question;
     97 	timeout = 0;
     98 	alarmcatch();
     99 	back = -1;
    100 	errcount = 0;
    101 	do {
    102 		if (fgets(replybuffer, 63, mytty) == NULL) {
    103 			clearerr(mytty);
    104 			if (++errcount > 30)	/* XXX	ugly */
    105 				quit("excessive operator query failures\n");
    106 		} else if (replybuffer[0] == 'y' || replybuffer[0] == 'Y') {
    107 			back = 1;
    108 		} else if (replybuffer[0] == 'n' || replybuffer[0] == 'N') {
    109 			back = 0;
    110 		} else {
    111 			(void) fprintf(stderr,
    112 			    "  DUMP: \"Yes\" or \"No\"?\n");
    113 			(void) fprintf(stderr,
    114 			    "  DUMP: %s: (\"yes\" or \"no\") ", question);
    115 		}
    116 	} while (back < 0);
    117 
    118 	/*
    119 	 *	Turn off the alarm, and reset the signal to trap out..
    120 	 */
    121 	(void) alarm(0);
    122 	if (signal(SIGALRM, sig) == SIG_IGN)
    123 		signal(SIGALRM, SIG_IGN);
    124 	(void) fclose(mytty);
    125 	return(back);
    126 }
    127 
    128 char lastmsg[100];
    129 
    130 /*
    131  *	Alert the console operator, and enable the alarm clock to
    132  *	sleep for 2 minutes in case nobody comes to satisfy dump
    133  */
    134 static void
    135 alarmcatch()
    136 {
    137 	if (notify == 0) {
    138 		if (timeout == 0)
    139 			(void) fprintf(stderr,
    140 			    "  DUMP: %s: (\"yes\" or \"no\") ",
    141 			    attnmessage);
    142 		else
    143 			msgtail("\7\7");
    144 	} else {
    145 		if (timeout) {
    146 			msgtail("\n");
    147 			broadcast("");		/* just print last msg */
    148 		}
    149 		(void) fprintf(stderr,"  DUMP: %s: (\"yes\" or \"no\") ",
    150 		    attnmessage);
    151 	}
    152 	signal(SIGALRM, alarmcatch);
    153 	(void) alarm(120);
    154 	timeout = 1;
    155 }
    156 
    157 /*
    158  *	Here if an inquisitive operator interrupts the dump program
    159  */
    160 void
    161 interrupt(signo)
    162 	int signo;
    163 {
    164 	msg("Interrupt received.\n");
    165 	if (query("Do you want to abort dump?"))
    166 		dumpabort(0);
    167 }
    168 
    169 /*
    170  *	The following variables and routines manage alerting
    171  *	operators to the status of dump.
    172  *	This works much like wall(1) does.
    173  */
    174 struct	group *gp;
    175 
    176 /*
    177  *	Get the names from the group entry "operator" to notify.
    178  */
    179 void
    180 set_operators()
    181 {
    182 	if (!notify)		/*not going to notify*/
    183 		return;
    184 	gp = getgrnam(OPGRENT);
    185 	(void) endgrent();
    186 	if (gp == NULL) {
    187 		msg("No group entry for %s.\n", OPGRENT);
    188 		notify = 0;
    189 		return;
    190 	}
    191 }
    192 
    193 struct tm *localtime();
    194 struct tm *localclock;
    195 
    196 /*
    197  *	We fork a child to do the actual broadcasting, so
    198  *	that the process control groups are not messed up
    199  */
    200 void
    201 broadcast(message)
    202 	char	*message;
    203 {
    204 	time_t		clock;
    205 	FILE	*f_utmp;
    206 	struct	utmp	utmp;
    207 	char	**np;
    208 	int	pid, s;
    209 
    210 	if (!notify || gp == NULL)
    211 		return;
    212 
    213 	switch (pid = fork()) {
    214 	case -1:
    215 		return;
    216 	case 0:
    217 		break;
    218 	default:
    219 		while (wait(&s) != pid)
    220 			continue;
    221 		return;
    222 	}
    223 
    224 	clock = time((time_t *)0);
    225 	localclock = localtime(&clock);
    226 
    227 	if ((f_utmp = fopen(_PATH_UTMP, "r")) == NULL) {
    228 		msg("Cannot open %s: %s\n", _PATH_UTMP, strerror(errno));
    229 		return;
    230 	}
    231 
    232 	while (!feof(f_utmp)) {
    233 		if (fread((char *) &utmp, sizeof (struct utmp), 1, f_utmp) != 1)
    234 			break;
    235 		if (utmp.ut_name[0] == 0)
    236 			continue;
    237 		for (np = gp->gr_mem; *np; np++) {
    238 			if (strncmp(*np, utmp.ut_name, sizeof(utmp.ut_name)) != 0)
    239 				continue;
    240 			/*
    241 			 *	Do not send messages to operators on dialups
    242 			 */
    243 			if (strncmp(utmp.ut_line, DIALUP, strlen(DIALUP)) == 0)
    244 				continue;
    245 #ifdef DEBUG
    246 			msg("Message to %s at %s\n", *np, utmp.ut_line);
    247 #endif
    248 			sendmes(utmp.ut_line, message);
    249 		}
    250 	}
    251 	(void) fclose(f_utmp);
    252 	Exit(0);	/* the wait in this same routine will catch this */
    253 	/* NOTREACHED */
    254 }
    255 
    256 static void
    257 sendmes(tty, message)
    258 	char *tty, *message;
    259 {
    260 	char t[50], buf[BUFSIZ];
    261 	register char *cp;
    262 	int lmsg = 1;
    263 	FILE *f_tty;
    264 
    265 	(void) strcpy(t, _PATH_DEV);
    266 	(void) strcat(t, tty);
    267 
    268 	if ((f_tty = fopen(t, "w")) != NULL) {
    269 		setbuf(f_tty, buf);
    270 		(void) fprintf(f_tty,
    271 		    "\n\
    272 \7\7\7Message from the dump program to all operators at %d:%02d ...\r\n\n\
    273 DUMP: NEEDS ATTENTION: ",
    274 		    localclock->tm_hour, localclock->tm_min);
    275 		for (cp = lastmsg; ; cp++) {
    276 			if (*cp == '\0') {
    277 				if (lmsg) {
    278 					cp = message;
    279 					if (*cp == '\0')
    280 						break;
    281 					lmsg = 0;
    282 				} else
    283 					break;
    284 			}
    285 			if (*cp == '\n')
    286 				(void) putc('\r', f_tty);
    287 			(void) putc(*cp, f_tty);
    288 		}
    289 		(void) fclose(f_tty);
    290 	}
    291 }
    292 
    293 /*
    294  *	print out an estimate of the amount of time left to do the dump
    295  */
    296 
    297 time_t	tschedule = 0;
    298 
    299 void
    300 timeest()
    301 {
    302 	time_t	tnow, deltat;
    303 
    304 	(void) time((time_t *) &tnow);
    305 	if (tnow >= tschedule) {
    306 		tschedule = tnow + 300;
    307 		if (blockswritten < 500)
    308 			return;
    309 		deltat = tstart_writing - tnow +
    310 			(1.0 * (tnow - tstart_writing))
    311 			/ blockswritten * tapesize;
    312 		msg("%3.2f%% done, finished in %d:%02d\n",
    313 			(blockswritten * 100.0) / tapesize,
    314 			deltat / 3600, (deltat % 3600) / 60);
    315 	}
    316 }
    317 
    318 void
    319 #if __STDC__
    320 msg(const char *fmt, ...)
    321 #else
    322 msg(fmt, va_alist)
    323 	char *fmt;
    324 	va_dcl
    325 #endif
    326 {
    327 	va_list ap;
    328 
    329 	(void) fprintf(stderr,"  DUMP: ");
    330 #ifdef TDEBUG
    331 	(void) fprintf(stderr, "pid=%d ", getpid());
    332 #endif
    333 #if __STDC__
    334 	va_start(ap, fmt);
    335 #else
    336 	va_start(ap);
    337 #endif
    338 	(void) vfprintf(stderr, fmt, ap);
    339 	(void) fflush(stdout);
    340 	(void) fflush(stderr);
    341 	(void) vsprintf(lastmsg, fmt, ap);
    342 	va_end(ap);
    343 }
    344 
    345 void
    346 #if __STDC__
    347 msgtail(const char *fmt, ...)
    348 #else
    349 msgtail(fmt, va_alist)
    350 	char *fmt;
    351 	va_dcl
    352 #endif
    353 {
    354 	va_list ap;
    355 #if __STDC__
    356 	va_start(ap, fmt);
    357 #else
    358 	va_start(ap);
    359 #endif
    360 	(void) vfprintf(stderr, fmt, ap);
    361 	va_end(ap);
    362 }
    363 
    364 void
    365 #if __STDC__
    366 quit(const char *fmt, ...)
    367 #else
    368 quit(fmt, va_alist)
    369 	char *fmt;
    370 	va_dcl
    371 #endif
    372 {
    373 	va_list ap;
    374 
    375 	(void) fprintf(stderr,"  DUMP: ");
    376 #ifdef TDEBUG
    377 	(void) fprintf(stderr, "pid=%d ", getpid());
    378 #endif
    379 #if __STDC__
    380 	va_start(ap, fmt);
    381 #else
    382 	va_start(ap);
    383 #endif
    384 	(void) vfprintf(stderr, fmt, ap);
    385 	va_end(ap);
    386 	(void) fflush(stdout);
    387 	(void) fflush(stderr);
    388 	dumpabort(0);
    389 }
    390 
    391 /*
    392  *	Tell the operator what has to be done;
    393  *	we don't actually do it
    394  */
    395 
    396 struct fstab *
    397 allocfsent(fs)
    398 	register struct fstab *fs;
    399 {
    400 	register struct fstab *new;
    401 
    402 	new = (struct fstab *)malloc(sizeof (*fs));
    403 	if (new == NULL ||
    404 	    (new->fs_file = strdup(fs->fs_file)) == NULL ||
    405 	    (new->fs_type = strdup(fs->fs_type)) == NULL ||
    406 	    (new->fs_spec = strdup(fs->fs_spec)) == NULL)
    407 		quit("%s\n", strerror(errno));
    408 	new->fs_passno = fs->fs_passno;
    409 	new->fs_freq = fs->fs_freq;
    410 	return (new);
    411 }
    412 
    413 struct	pfstab {
    414 	struct	pfstab *pf_next;
    415 	struct	fstab *pf_fstab;
    416 };
    417 
    418 static	struct pfstab *table;
    419 
    420 void
    421 getfstab()
    422 {
    423 	register struct fstab *fs;
    424 	register struct pfstab *pf;
    425 
    426 	if (setfsent() == 0) {
    427 		msg("Can't open %s for dump table information: %s\n",
    428 		    _PATH_FSTAB, strerror(errno));
    429 		return;
    430 	}
    431 	while (fs = getfsent()) {
    432 		if (strcmp(fs->fs_type, FSTAB_RW) &&
    433 		    strcmp(fs->fs_type, FSTAB_RO) &&
    434 		    strcmp(fs->fs_type, FSTAB_RQ))
    435 			continue;
    436 		fs = allocfsent(fs);
    437 		if ((pf = (struct pfstab *)malloc(sizeof (*pf))) == NULL)
    438 			quit("%s\n", strerror(errno));
    439 		pf->pf_fstab = fs;
    440 		pf->pf_next = table;
    441 		table = pf;
    442 	}
    443 	(void) endfsent();
    444 }
    445 
    446 /*
    447  * Search in the fstab for a file name.
    448  * This file name can be either the special or the path file name.
    449  *
    450  * The entries in the fstab are the BLOCK special names, not the
    451  * character special names.
    452  * The caller of fstabsearch assures that the character device
    453  * is dumped (that is much faster)
    454  *
    455  * The file name can omit the leading '/'.
    456  */
    457 struct fstab *
    458 fstabsearch(key)
    459 	char *key;
    460 {
    461 	register struct pfstab *pf;
    462 	register struct fstab *fs;
    463 	char *rn, *rawname();
    464 
    465 	for (pf = table; pf != NULL; pf = pf->pf_next) {
    466 		fs = pf->pf_fstab;
    467 		if (strcmp(fs->fs_file, key) == 0 ||
    468 		    strcmp(fs->fs_spec, key) == 0)
    469 			return (fs);
    470 		rn = rawname(fs->fs_spec);
    471 		if (rn != NULL && strcmp(rn, key) == 0)
    472 			return (fs);
    473 		if (key[0] != '/') {
    474 			if (*fs->fs_spec == '/' &&
    475 			    strcmp(fs->fs_spec + 1, key) == 0)
    476 				return (fs);
    477 			if (*fs->fs_file == '/' &&
    478 			    strcmp(fs->fs_file + 1, key) == 0)
    479 				return (fs);
    480 		}
    481 	}
    482 	return (NULL);
    483 }
    484 
    485 /*
    486  *	Tell the operator what to do
    487  */
    488 void
    489 lastdump(arg)
    490 	char	arg;	/* w ==> just what to do; W ==> most recent dumps */
    491 {
    492 	register int i;
    493 	register struct fstab *dt;
    494 	register struct dumpdates *dtwalk;
    495 	char *lastname, *date;
    496 	int dumpme, datesort();
    497 	time_t tnow;
    498 
    499 	(void) time(&tnow);
    500 	getfstab();		/* /etc/fstab input */
    501 	initdumptimes();	/* /etc/dumpdates input */
    502 	qsort((char *) ddatev, nddates, sizeof(struct dumpdates *), datesort);
    503 
    504 	if (arg == 'w')
    505 		(void) printf("Dump these file systems:\n");
    506 	else
    507 		(void) printf("Last dump(s) done (Dump '>' file systems):\n");
    508 	lastname = "??";
    509 	ITITERATE(i, dtwalk) {
    510 		if (strncmp(lastname, dtwalk->dd_name,
    511 		    sizeof(dtwalk->dd_name)) == 0)
    512 			continue;
    513 		date = (char *)ctime(&dtwalk->dd_ddate);
    514 		date[16] = '\0';	/* blast away seconds and year */
    515 		lastname = dtwalk->dd_name;
    516 		dt = fstabsearch(dtwalk->dd_name);
    517 		dumpme = (dt != NULL &&
    518 		    dt->fs_freq != 0 &&
    519 		    dtwalk->dd_ddate < tnow - (dt->fs_freq * SECSPERDAY));
    520 		if (arg != 'w' || dumpme)
    521 			(void) printf(
    522 			    "%c %8s\t(%6s) Last dump: Level %c, Date %s\n",
    523 			    dumpme && (arg != 'w') ? '>' : ' ',
    524 			    dtwalk->dd_name,
    525 			    dt ? dt->fs_file : "",
    526 			    dtwalk->dd_level,
    527 			    date);
    528 	}
    529 }
    530 
    531 int
    532 datesort(a1, a2)
    533 	void *a1, *a2;
    534 {
    535 	struct dumpdates *d1 = *(struct dumpdates **)a1;
    536 	struct dumpdates *d2 = *(struct dumpdates **)a2;
    537 	int diff;
    538 
    539 	diff = strncmp(d1->dd_name, d2->dd_name, sizeof(d1->dd_name));
    540 	if (diff == 0)
    541 		return (d2->dd_ddate - d1->dd_ddate);
    542 	return (diff);
    543 }
    544 
    545