OpenBSD-4.6/sbin/dump/optr.c
/* $OpenBSD: optr.c,v 1.30 2007/06/03 20:16:08 millert Exp $ */
/* $NetBSD: optr.c,v 1.11 1997/05/27 08:34:36 mrg Exp $ */
/*-
* 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. 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";
#else
static const char rcsid[] = "$OpenBSD: optr.c,v 1.30 2007/06/03 20:16:08 millert Exp $";
#endif
#endif /* not lint */
#include <sys/param.h>
#include <sys/wait.h>
#include <sys/time.h>
#include <ufs/ufs/dinode.h>
#include <errno.h>
#include <fstab.h>
#include <grp.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <tzfile.h>
#include <unistd.h>
#include <utmp.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 char *attnmessage; /* attention message */
int
query(char *question)
{
char replybuffer[64];
int back, errcount;
FILE *mytty;
time_t firstprompt, when_answered;
(void) time(&firstprompt);
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, sizeof(replybuffer), 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);
(void) time(&when_answered);
/*
* Adjust the base for time estimates to ignore time we spent waiting
* for operator input.
*/
if (when_answered - firstprompt > 0)
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
* XXX not safe
*/
/* ARGSUSED */
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
*/
/* ARGSUSED */
void
interrupt(int signo)
{
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(char *message)
{
FILE *fp;
char buf[sizeof(_PATH_WALL) + sizeof(OPGRENT) + 3];
if (!notify)
return;
(void)snprintf(buf, sizeof(buf), "%s -g %s", _PATH_WALL, OPGRENT);
if ((fp = popen(buf, "w")) == NULL)
return;
(void) fputs("\7\7\7Message 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)
{
time_t tnow, deltat;
(void) time((time_t *) &tnow);
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
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(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 {
struct pfstab *pf_next;
struct fstab *pf_fstab;
};
static struct pfstab *table;
void
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_vfstype, "ffs") &&
strcmp(fs->fs_vfstype, "ufs"))
continue;
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(char *key)
{
struct pfstab *pf;
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);
}
/*
* Tell the operator what to do
* w ==> just what to do; W ==> most recent dumps
*/
void
lastdump(int arg)
{
int i;
struct fstab *dt;
struct dumpdates *dtwalk;
char *lastname, *date;
int dumpme;
time_t tnow;
(void) time(&tnow);
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 &&
dtwalk->dd_ddate < tnow - (dt->fs_freq * SECSPERDAY));
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);
}