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optr.c

/*-
 * 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.
 * 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
#if 0
static char sccsid[] = "@(#)optr.c  8.2 (Berkeley) 1/6/94";
#endif
static const char rcsid[] =
  "$FreeBSD: src/sbin/dump/optr.c,v 1.35 2006/08/06 14:23:50 marck Exp $";
#endif /* not lint */

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

#include <ufs/ufs/dinode.h>

#include <errno.h>
#include <fstab.h>
#include <grp.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <signal.h>
#include <unistd.h>

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

void  alarmcatch(int);
int   datesort(const void *, const void *);

/*
 *    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;

      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);
      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
 */
void
alarmcatch(int sig __unused)
{
      if (notify == 0) {
            if (timeout == 0)
                  (void) fprintf(stderr,
                      "  DUMP: %s: (\"yes\" or \"no\") ",
                      attnmessage);
            else
                  msgtail("\a\a");
      } 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;
}

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

/*
 *    We now use wall(1) to do the actual broadcasting.
 */
void
broadcast(const char *message)
{
      FILE *fp;
      char buf[sizeof(_PATH_WALL) + sizeof(OPGRENT) + 3];

      if (!notify)
            return;

      snprintf(buf, sizeof(buf), "%s -g %s", _PATH_WALL, OPGRENT);
      if ((fp = popen(buf, "w")) == NULL)
            return;

      (void) fputs("\a\a\aMessage from the dump program to all operators\n\nDUMP: NEEDS ATTENTION: ", fp);
      if (lastmsg[0])
            (void) fputs(lastmsg, fp);
      if (message[0])
            (void) fputs(message, fp);

      (void) pclose(fp);
}

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

time_t      tschedule = 0;

void
timeest(void)
{
      double percent;
      time_t      tnow, tdone;
      char *tdone_str;
      int deltat, hours, mins;

      (void)time(&tnow);
      if (blockswritten > tapesize) {
            setproctitle("%s: 99.99%% done, finished soon", disk);
            if (tnow >= tschedule) {
                  tschedule = tnow + 300;
                  msg("99.99%% done, finished soon\n");
            }
      } else {
            deltat = (blockswritten == 0) ? 0 : tstart_writing - tnow +
                (double)(tnow - tstart_writing) / blockswritten * tapesize;
            tdone = tnow + deltat;
            percent = (blockswritten * 100.0) / tapesize;
            hours = deltat / 3600;
            mins = (deltat % 3600) / 60;

            tdone_str = ctime(&tdone);
            tdone_str[strlen(tdone_str) - 1] = '\0';
            setproctitle(
                "%s: pass %d: %3.2f%% done, finished in %d:%02d at %s",
                disk, passno, percent, hours, mins, tdone_str);
            if (tnow >= tschedule) {
                  tschedule = tnow + 300;
                  if (blockswritten < 500)
                        return;
                  msg("%3.2f%% done, finished in %d:%02d at %s\n", percent,
                      hours, mins, tdone_str);
            }
      }
}

/*
 * Schedule a printout of the estimate in the next call to timeest().
 */
void
infosch(int signal __unused)
{
      tschedule = 0;
}

void
msg(const char *fmt, ...)
{
      va_list ap;

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

void
msgtail(const char *fmt, ...)
{
      va_list ap;

      va_start(ap, fmt);
      (void) vfprintf(stderr, fmt, ap);
      va_end(ap);
}

void
quit(const char *fmt, ...)
{
      va_list ap;

      (void) fprintf(stderr,"  DUMP: ");
#ifdef TDEBUG
      (void) fprintf(stderr, "pid=%d ", getpid());
#endif
      va_start(ap, fmt);
      (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
 */

struct fstab *
allocfsent(const struct fstab *fs)
{
      struct fstab *new;

      new = (struct fstab *)malloc(sizeof (*fs));
      if (new == NULL ||
          (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 {
      SLIST_ENTRY(pfstab) pf_list;
      struct      fstab *pf_fstab;
};

static      SLIST_HEAD(, pfstab) table;

void
dump_getfstab(void)
{
      struct fstab *fs;
      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;
            SLIST_INSERT_HEAD(&table, pf, pf_list);
      }
      (void) endfsent();
}

/*
 * Search in the fstab for a file name.
 * This file name can be either the special or the path file name.
 *
 * The file name can omit the leading '/'.
 */
struct fstab *
fstabsearch(const char *key)
{
      struct pfstab *pf;
      struct fstab *fs;
      char *rn;

      SLIST_FOREACH(pf, &table, pf_list) {
            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);
}

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

      (void) time(&tnow);
      dump_getfstab();  /* /etc/fstab input */
      initdumptimes();  /* /etc/dumpdates input */
      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);
            if (dumpme) {
                tlast = localtime(&dtwalk->dd_ddate);
                dumpme = tnow > (dtwalk->dd_ddate - (tlast->tm_hour * 3600)
                             - (tlast->tm_min * 60) - tlast->tm_sec
                             + (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);
}

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