sbin/dump/optr.c

   1 /*-
   2  * Copyright (c) 1980, 1988, 1993
   3  *      The Regents of the University of California.  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. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * @(#)optr.c   8.2 (Berkeley) 1/6/94
  30  * $FreeBSD: src/sbin/dump/optr.c,v 1.9.2.5 2002/02/23 22:32:51 iedowse Exp $
  31  * $DragonFly: src/sbin/dump/optr.c,v 1.10 2005/08/28 04:35:12 dillon Exp $
  32  */
  33
  34 #include <sys/param.h>
  35 #include <sys/queue.h>
  36 #include <sys/wait.h>
  37 #include <sys/time.h>
  38
  39 #include <errno.h>
  40 #include <fstab.h>
  41 #include <grp.h>
  42 #include <stdio.h>
  43 #include <stdlib.h>
  44 #include <string.h>
  45 #include <stdarg.h>
  46 #include <signal.h>
  47 #include <unistd.h>
  48 #include <utmp.h>
  49
  50 #include <vfs/ufs/dinode.h>
  51
  52 #include "dump.h"
  53 #include "pathnames.h"
  54
  55 static void     alarmcatch(int);
  56 static int      datesort(const void *, const void *);
  57
  58 /*
  59  *      Query the operator; This previously-fascist piece of code
  60  *      no longer requires an exact response.
  61  *      It is intended to protect dump aborting by inquisitive
  62  *      people banging on the console terminal to see what is
  63  *      happening which might cause dump to croak, destroying
  64  *      a large number of hours of work.
  65  *
  66  *      Every 2 minutes we reprint the message, alerting others
  67  *      that dump needs attention.
  68  */
  69 static int timeout;
  70 static const char *attnmessage;         /* attention message */
  71
  72 int
  73 query(const char *question)
  74 {
  75         char    replybuffer[64];
  76         int     back, errcount;
  77         FILE    *mytty;
  78
  79         if ((mytty = fopen(_PATH_TTY, "r")) == NULL)
  80                 quit("fopen on %s fails: %s\n", _PATH_TTY, strerror(errno));
  81         attnmessage = question;
  82         timeout = 0;
  83         alarmcatch(0);
  84         back = -1;
  85         errcount = 0;
  86         do {
  87                 if (fgets(replybuffer, 63, mytty) == NULL) {
  88                         clearerr(mytty);
  89                         if (++errcount > 30)    /* XXX  ugly */
  90                                 quit("excessive operator query failures\n");
  91                 } else if (replybuffer[0] == 'y' || replybuffer[0] == 'Y') {
  92                         back = 1;
  93                 } else if (replybuffer[0] == 'n' || replybuffer[0] == 'N') {
  94                         back = 0;
  95                 } else {
  96                         fprintf(stderr, "  DUMP: \"Yes\" or \"No\"?\n");
  97                         fprintf(stderr, "  DUMP: %s: (\"yes\" or \"no\") ",
  98                             question);
  99                 }
 100         } while (back < 0);
 101
 102         /*
 103          *      Turn off the alarm, and reset the signal to trap out..
 104          */
 105         alarm(0);
 106         if (signal(SIGALRM, sig) == SIG_IGN)
 107                 signal(SIGALRM, SIG_IGN);
 108         fclose(mytty);
 109         return(back);
 110 }
 111
 112 char lastmsg[BUFSIZ];
 113
 114 /*
 115  *      Alert the console operator, and enable the alarm clock to
 116  *      sleep for 2 minutes in case nobody comes to satisfy dump
 117  */
 118 static void
 119 alarmcatch(int signo __unused)
 120 {
 121         if (notify == 0) {
 122                 if (timeout == 0)
 123                         fprintf(stderr, "  DUMP: %s: (\"yes\" or \"no\") ",
 124                             attnmessage);
 125                 else
 126                         msgtail("\a\a");
 127         } else {
 128                 if (timeout) {
 129                         msgtail("\n");
 130                         broadcast("");          /* just print last msg */
 131                 }
 132                 fprintf(stderr,"  DUMP: %s: (\"yes\" or \"no\") ", attnmessage);
 133         }
 134         signal(SIGALRM, alarmcatch);
 135         alarm(120);
 136         timeout = 1;
 137 }
 138
 139 /*
 140  *      Here if an inquisitive operator interrupts the dump program
 141  */
 142 void
 143 interrupt(int signo __unused)
 144 {
 145         msg("Interrupt received.\n");
 146         if (query("Do you want to abort dump?"))
 147                 dumpabort(0);
 148 }
 149
 150 /*
 151  *      We now use wall(1) to do the actual broadcasting.
 152  */
 153 void
 154 broadcast(const char *message)
 155 {
 156         FILE *fp;
 157         char buf[sizeof(_PATH_WALL) + sizeof(OPGRENT) + 3];
 158
 159         if (!notify)
 160                 return;
 161
 162         snprintf(buf, sizeof(buf), "%s -g %s", _PATH_WALL, OPGRENT);
 163         if ((fp = popen(buf, "w")) == NULL)
 164                 return;
 165
 166         fputs("\a\a\aMessage from the dump program to all operators\n\nDUMP: NEEDS ATTENTION: ", fp);
 167         if (lastmsg[0])
 168                 fputs(lastmsg, fp);
 169         if (message[0])
 170                 fputs(message, fp);
 171
 172         pclose(fp);
 173 }
 174
 175 /*
 176  *      Print out an estimate of the amount of time left to do the dump
 177  */
 178
 179 time_t  tschedule = 0;
 180
 181 void
 182 timeest(void)
 183 {
 184         double percent;
 185         time_t  tnow;
 186         int deltat, hours, mins;
 187
 188         time(&tnow);
 189         deltat = (blockswritten == 0) ? 0 : tstart_writing - tnow +
 190             (double)(tnow - tstart_writing) / blockswritten * tapesize;
 191         percent = (blockswritten * 100.0) / tapesize;
 192         hours = deltat / 3600;
 193         mins = (deltat % 3600) / 60;
 194
 195         setproctitle("%s: pass %d: %3.2f%% done, finished in %d:%02d",
 196             disk, passno, percent, hours, mins);
 197         if (tnow >= tschedule) {
 198                 tschedule = tnow + 300;
 199                 if (blockswritten < 500)
 200                         return;
 201                 msg("%3.2f%% done, finished in %d:%02d\n", percent, hours,
 202                     mins);
 203         }
 204 }
 205
 206 /*
 207  * Schedule a printout of the estimate in the next call to timeest().
 208  */
 209 void
 210 infosch(int signo __unused)
 211 {
 212         tschedule = 0;
 213 }
 214
 215 void
 216 msg(const char *fmt, ...)
 217 {
 218         va_list ap;
 219
 220         fprintf(stderr,"  DUMP: ");
 221 #ifdef TDEBUG
 222         fprintf(stderr, "pid=%d ", getpid());
 223 #endif
 224         va_start(ap, fmt);
 225         vfprintf(stderr, fmt, ap);
 226         va_end(ap);
 227         fflush(stdout);
 228         fflush(stderr);
 229         va_start(ap, fmt);
 230         vsnprintf(lastmsg, sizeof(lastmsg), fmt, ap);
 231         va_end(ap);
 232 }
 233
 234 void
 235 msgtail(const char *fmt, ...)
 236 {
 237         va_list ap;
 238
 239         va_start(ap, fmt);
 240         vfprintf(stderr, fmt, ap);
 241         va_end(ap);
 242 }
 243
 244 void
 245 quit(const char *fmt, ...)
 246 {
 247         va_list ap;
 248
 249         fprintf(stderr,"  DUMP: ");
 250 #ifdef TDEBUG
 251         fprintf(stderr, "pid=%d ", getpid());
 252 #endif
 253         va_start(ap, fmt);
 254         vfprintf(stderr, fmt, ap);
 255         va_end(ap);
 256         fflush(stdout);
 257         fflush(stderr);
 258         dumpabort(0);
 259 }
 260
 261 /*
 262  *      Tell the operator what has to be done;
 263  *      we don't actually do it
 264  */
 265
 266 static struct fstab *
 267 allocfsent(struct fstab *fs)
 268 {
 269         struct fstab *new;
 270
 271         new = (struct fstab *)malloc(sizeof (*fs));
 272         if (new == NULL ||
 273             (new->fs_file = strdup(fs->fs_file)) == NULL ||
 274             (new->fs_type = strdup(fs->fs_type)) == NULL ||
 275             (new->fs_spec = strdup(fs->fs_spec)) == NULL)
 276                 quit("%s\n", strerror(errno));
 277         new->fs_passno = fs->fs_passno;
 278         new->fs_freq = fs->fs_freq;
 279         return (new);
 280 }
 281
 282 struct  pfstab {
 283         SLIST_ENTRY(pfstab) pf_list;
 284         struct  fstab *pf_fstab;
 285 };
 286
 287 static  SLIST_HEAD(, pfstab) table;
 288
 289 void
 290 dump_getfstab(void)
 291 {
 292         struct fstab *fs;
 293         struct pfstab *pf;
 294
 295         if (setfsent() == 0) {
 296                 msg("Can't open %s for dump table information: %s\n",
 297                     _PATH_FSTAB, strerror(errno));
 298                 return;
 299         }
 300         while ((fs = getfsent()) != NULL) {
 301                 if (strcmp(fs->fs_type, FSTAB_RW) &&
 302                     strcmp(fs->fs_type, FSTAB_RO) &&
 303                     strcmp(fs->fs_type, FSTAB_RQ))
 304                         continue;
 305                 fs = allocfsent(fs);
 306                 if ((pf = (struct pfstab *)malloc(sizeof (*pf))) == NULL)
 307                         quit("%s\n", strerror(errno));
 308                 pf->pf_fstab = fs;
 309                 SLIST_INSERT_HEAD(&table, pf, pf_list);
 310         }
 311         endfsent();
 312 }
 313
 314 /*
 315  * Search in the fstab for a file name.
 316  * This file name can be either the special or the path file name.
 317  *
 318  * The file name can omit the leading '/'.
 319  */
 320 struct fstab *
 321 fstabsearch(const char *key)
 322 {
 323         struct pfstab *pf;
 324         struct fstab *fs;
 325         char *rn;
 326
 327         SLIST_FOREACH(pf, &table, pf_list) {
 328                 fs = pf->pf_fstab;
 329                 if (strcmp(fs->fs_file, key) == 0 ||
 330                     strcmp(fs->fs_spec, key) == 0)
 331                         return (fs);
 332                 rn = rawname(fs->fs_spec);
 333                 if (rn != NULL && strcmp(rn, key) == 0)
 334                         return (fs);
 335                 if (key[0] != '/') {
 336                         if (*fs->fs_spec == '/' &&
 337                             strcmp(fs->fs_spec + 1, key) == 0)
 338                                 return (fs);
 339                         if (*fs->fs_file == '/' &&
 340                             strcmp(fs->fs_file + 1, key) == 0)
 341                                 return (fs);
 342                 }
 343         }
 344         return (NULL);
 345 }
 346
 347 /*
 348  *      Tell the operator what to do
 349  *
 350  * char arg: w ==> just what to do; W ==> most recent dumps
 351  */
 352 void
 353 lastdump(int arg)
 354 {
 355         int i;
 356         struct fstab *dt;
 357         struct dumpdates *dtwalk;
 358         const char *lastname;
 359         char *date;
 360         int dumpme;
 361         time_t tnow;
 362         struct tm *tlast;
 363
 364         time(&tnow);
 365         dump_getfstab();        /* /etc/fstab input */
 366         initdumptimes();        /* /etc/dumpdates input */
 367         qsort(ddatev, nddates, sizeof(struct dumpdates *), datesort);
 368
 369         if (arg == 'w')
 370                 printf("Dump these file systems:\n");
 371         else
 372                 printf("Last dump(s) done (Dump '>' file systems):\n");
 373         lastname = "??";
 374         ITITERATE(i, dtwalk) {
 375                 if (strncmp(lastname, dtwalk->dd_name,
 376                     sizeof(dtwalk->dd_name)) == 0)
 377                         continue;
 378                 date = (char *)ctime(&dtwalk->dd_ddate);
 379                 date[16] = '\0';        /* blast away seconds and year */
 380                 lastname = dtwalk->dd_name;
 381                 dt = fstabsearch(dtwalk->dd_name);
 382                 dumpme = (dt != NULL && dt->fs_freq != 0);
 383                 if (dumpme) {
 384                     tlast = localtime(&dtwalk->dd_ddate);
 385                     dumpme = tnow > (dtwalk->dd_ddate - (tlast->tm_hour * 3600)
 386                                      - (tlast->tm_min * 60) - tlast->tm_sec
 387                                      + (dt->fs_freq * 86400));
 388                 };
 389                 if (arg != 'w' || dumpme)
 390                         printf(
 391                             "%c %8s\t(%6s) Last dump: Level %c, Date %s\n",
 392                             dumpme && (arg != 'w') ? '>' : ' ',
 393                             dtwalk->dd_name,
 394                             dt ? dt->fs_file : "",
 395                             dtwalk->dd_level,
 396                             date);
 397         }
 398 }
 399
 400 static int
 401 datesort(const void *a1, const void *a2)
 402 {
 403         const struct dumpdates *d1 = *(const struct dumpdates * const *)a1;
 404         const struct dumpdates *d2 = *(const struct dumpdates * const *)a2;
 405         int diff;
 406
 407         diff = strncmp(d1->dd_name, d2->dd_name, sizeof(d1->dd_name));
 408         if (diff == 0)
 409                 return (d2->dd_ddate - d1->dd_ddate);
 410         return (diff);
 411 }