OpenBSD-4.6/sbin/fsck/preen.c
/* $OpenBSD: preen.c,v 1.16 2005/10/28 07:30:35 otto Exp $ */
/* $NetBSD: preen.c,v 1.15 1996/09/28 19:21:42 christos Exp $ */
/*
* Copyright (c) 1990, 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[] = "@(#)preen.c 8.3 (Berkeley) 12/6/94";
#else
static const char rcsid[] = "$OpenBSD: preen.c,v 1.16 2005/10/28 07:30:35 otto Exp $";
#endif
#endif /* not lint */
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <sys/queue.h>
#include <fstab.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <unistd.h>
#include <err.h>
#include "fsutil.h"
struct partentry {
TAILQ_ENTRY(partentry) p_entries;
char *p_devname; /* device name */
char *p_mntpt; /* mount point */
char *p_type; /* filesystem type */
void *p_auxarg; /* auxiliary argument */
};
TAILQ_HEAD(part, partentry) badh;
struct diskentry {
TAILQ_ENTRY(diskentry) d_entries;
char *d_name; /* disk base name */
TAILQ_HEAD(prt, partentry) d_part; /* list of partitions on disk */
pid_t d_pid; /* 0 or pid of fsck proc */
};
TAILQ_HEAD(disk, diskentry) diskh;
static int nrun = 0, ndisks = 0;
static struct diskentry *finddisk(const char *);
static void addpart(const char *, const char *, const char *, void *);
static int startdisk(struct diskentry *,
int (*)(const char *, const char *, const char *, void *, pid_t *));
static void printpart(void);
int
checkfstab(int flags, int maxrun, void *(*docheck)(struct fstab *),
int (*checkit)(const char *, const char *, const char *, void *, pid_t *))
{
struct fstab *fs;
struct diskentry *d, *nextdisk;
struct partentry *p;
int ret, retcode, passno, sumstatus, status;
void *auxarg;
char *name;
pid_t pid;
TAILQ_INIT(&badh);
TAILQ_INIT(&diskh);
sumstatus = 0;
for (passno = 1; passno <= 2; passno++) {
if (setfsent() == 0) {
warnx("Can't open checklist file: %s", _PATH_FSTAB);
return (8);
}
while ((fs = getfsent()) != 0) {
if ((auxarg = (*docheck)(fs)) == NULL)
continue;
name = blockcheck(fs->fs_spec);
if (flags & CHECK_DEBUG)
printf("pass %d, name %s\n", passno, name);
if ((flags & CHECK_PREEN) == 0 ||
(passno == 1 && fs->fs_passno == 1)) {
if (name == NULL) {
if (flags & CHECK_PREEN)
return 8;
else
continue;
}
sumstatus = (*checkit)(fs->fs_vfstype,
name, fs->fs_file, auxarg, NULL);
if (sumstatus)
return (sumstatus);
} else if (passno == 2 && fs->fs_passno > 1) {
if (name == NULL) {
(void) fprintf(stderr,
"BAD DISK NAME %s\n", fs->fs_spec);
sumstatus |= 8;
continue;
}
addpart(fs->fs_vfstype, name, fs->fs_file,
auxarg);
}
}
if ((flags & CHECK_PREEN) == 0)
return 0;
}
if (flags & CHECK_DEBUG)
printpart();
if (flags & CHECK_PREEN) {
if (maxrun == 0)
maxrun = ndisks;
if (maxrun > ndisks)
maxrun = ndisks;
nextdisk = TAILQ_FIRST(&diskh);
for (passno = 0; passno < maxrun; ++passno) {
if ((ret = startdisk(nextdisk, checkit)) != 0)
return ret;
nextdisk = TAILQ_NEXT(nextdisk, d_entries);
}
while ((pid = wait(&status)) != -1) {
TAILQ_FOREACH(d, &diskh, d_entries)
if (d->d_pid == pid)
break;
if (d == NULL) {
warnx("Unknown pid %ld", (long)pid);
continue;
}
if (WIFEXITED(status))
retcode = WEXITSTATUS(status);
else
retcode = 0;
p = TAILQ_FIRST(&d->d_part);
if (flags & (CHECK_DEBUG|CHECK_VERBOSE))
(void) printf("done %s: %s (%s) = %x\n",
p->p_type, p->p_devname, p->p_mntpt,
status);
if (WIFSIGNALED(status)) {
(void) fprintf(stderr,
"%s: %s (%s): EXITED WITH SIGNAL %d\n",
p->p_type, p->p_devname, p->p_mntpt,
WTERMSIG(status));
retcode = 8;
}
TAILQ_REMOVE(&d->d_part, p, p_entries);
if (retcode != 0) {
TAILQ_INSERT_TAIL(&badh, p, p_entries);
sumstatus |= retcode;
} else {
free(p->p_type);
free(p->p_devname);
free(p);
}
d->d_pid = 0;
nrun--;
if (TAILQ_EMPTY(&d->d_part))
ndisks--;
if (nextdisk == NULL) {
if (!TAILQ_EMPTY(&d->d_part)) {
if ((ret = startdisk(d, checkit)) != 0)
return ret;
}
} else if (nrun < maxrun && nrun < ndisks) {
for ( ;; ) {
nextdisk = TAILQ_NEXT(nextdisk,
d_entries);
if (nextdisk == NULL)
nextdisk = TAILQ_FIRST(&diskh);
if (!TAILQ_EMPTY(&nextdisk->d_part) &&
nextdisk->d_pid == 0)
break;
}
if ((ret = startdisk(nextdisk, checkit)) != 0)
return ret;
}
}
}
if (sumstatus) {
p = TAILQ_FIRST(&badh);
if (p == NULL)
return (sumstatus);
(void) fprintf(stderr,
"THE FOLLOWING FILE SYSTEM%s HAD AN %s\n\t",
TAILQ_NEXT(p, p_entries) ? "S" : "",
"UNEXPECTED INCONSISTENCY:");
for (; p; p = TAILQ_NEXT(p, p_entries))
(void) fprintf(stderr,
"%s: %s (%s)%s", p->p_type, p->p_devname,
p->p_mntpt, TAILQ_NEXT(p, p_entries) ? ", " : "\n");
return sumstatus;
}
(void) endfsent();
return (0);
}
static struct diskentry *
finddisk(const char *name)
{
const char *p;
size_t len = 0;
struct diskentry *d;
for (p = name + strlen(name) - 1; p >= name; --p)
if (isdigit(*p)) {
len = p - name + 1;
break;
}
if (p < name)
len = strlen(name);
TAILQ_FOREACH(d, &diskh, d_entries)
if (strncmp(d->d_name, name, len) == 0 && d->d_name[len] == 0)
return d;
d = emalloc(sizeof(*d));
d->d_name = estrdup(name);
d->d_name[len] = '\0';
TAILQ_INIT(&d->d_part);
d->d_pid = 0;
TAILQ_INSERT_TAIL(&diskh, d, d_entries);
ndisks++;
return d;
}
static void
printpart(void)
{
struct diskentry *d;
struct partentry *p;
TAILQ_FOREACH(d, &diskh, d_entries) {
(void) printf("disk %s: ", d->d_name);
TAILQ_FOREACH(p, &d->d_part, p_entries)
(void) printf("%s ", p->p_devname);
(void) printf("\n");
}
}
static void
addpart(const char *type, const char *devname, const char *mntpt, void *auxarg)
{
struct diskentry *d = finddisk(devname);
struct partentry *p;
TAILQ_FOREACH(p, &d->d_part, p_entries)
if (strcmp(p->p_devname, devname) == 0) {
warnx("%s in fstab more than once!", devname);
return;
}
p = emalloc(sizeof(*p));
p->p_devname = estrdup(devname);
p->p_mntpt = estrdup(mntpt);
p->p_type = estrdup(type);
p->p_auxarg = auxarg;
TAILQ_INSERT_TAIL(&d->d_part, p, p_entries);
}
static int
startdisk(struct diskentry *d,
int (*checkit)(const char *, const char *, const char *, void *, pid_t *))
{
struct partentry *p = TAILQ_FIRST(&d->d_part);
int rv;
while ((rv = (*checkit)(p->p_type, p->p_devname, p->p_mntpt,
p->p_auxarg, &d->d_pid)) != 0 && nrun > 0)
sleep(10);
if (rv == 0)
nrun++;
return rv;
}