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BSD 4_3_Reno release
[unix-history] / usr / src / sbin / fsck / preen.c
/*
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted provided
* that: (1) source distributions retain this entire copyright notice and
* comment, and (2) distributions including binaries display the following
* acknowledgement: ``This product includes software developed by the
* University of California, Berkeley and its contributors'' in the
* documentation or other materials provided with the distribution and in
* all advertising materials mentioning features or use of this software.
* 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifndef lint
static char sccsid[] = "@(#)preen.c 5.5 (Berkeley) 7/20/90";
#endif /* not lint */
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <fstab.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
char *rawname(), *unrawname(), *blockcheck();
struct part {
struct part *next; /* forward link of partitions on disk */
char *name; /* device name */
char *fsname; /* mounted filesystem name */
long auxdata; /* auxillary data for application */
} *badlist, **badnext = &badlist;
struct disk {
char *name; /* disk base name */
struct disk *next; /* forward link for list of disks */
struct part *part; /* head of list of partitions on disk */
int pid; /* If != 0, pid of proc working on */
} *disks;
int nrun, ndisks;
char hotroot;
checkfstab(preen, maxrun, docheck, chkit)
int preen, maxrun;
int (*docheck)(), (*chkit)();
{
register struct fstab *fsp;
register struct disk *dk, *nextdisk;
register struct part *pt;
int ret, pid, retcode, passno, sumstatus, status;
long auxdata;
char *name;
sumstatus = 0;
for (passno = 1; passno <= 2; passno++) {
if (setfsent() == 0) {
fprintf(stderr, "Can't open checklist file: %s\n",
_PATH_FSTAB);
return (8);
}
while ((fsp = getfsent()) != 0) {
if ((auxdata = (*docheck)(fsp)) == 0)
continue;
if (preen == 0 || passno == 1 && fsp->fs_passno == 1) {
if (name = blockcheck(fsp->fs_spec)) {
if (sumstatus = (*chkit)(name,
fsp->fs_file, auxdata))
return (sumstatus);
} else if (preen)
return (8);
} else if (passno == 2 && fsp->fs_passno > 1) {
if ((name = blockcheck(fsp->fs_spec)) == NULL) {
fprintf(stderr, "BAD DISK NAME %s\n",
fsp->fs_spec);
sumstatus |= 8;
continue;
}
addpart(name, fsp->fs_file, auxdata);
}
}
if (preen == 0)
return (0);
}
if (preen) {
if (maxrun == 0)
maxrun = ndisks;
if (maxrun > ndisks)
maxrun = ndisks;
nextdisk = disks;
for (passno = 0; passno < maxrun; ++passno) {
while (ret = startdisk(nextdisk, chkit) && nrun > 0)
sleep(10);
if (ret)
return (ret);
nextdisk = nextdisk->next;
}
while ((pid = wait(&status)) != -1) {
for (dk = disks; dk; dk = dk->next)
if (dk->pid == pid)
break;
if (dk == 0) {
printf("Unknown pid %d\n", pid);
continue;
}
if (WIFEXITED(status))
retcode = WEXITSTATUS(status);
else
retcode = 0;
if (WIFSIGNALED(status)) {
printf("%s (%s): EXITED WITH SIGNAL %d\n",
dk->part->name, dk->part->fsname,
WTERMSIG(status));
retcode = 8;
}
if (retcode != 0) {
sumstatus |= retcode;
*badnext = dk->part;
badnext = &dk->part->next;
dk->part = dk->part->next;
*badnext = NULL;
} else
dk->part = dk->part->next;
dk->pid = 0;
nrun--;
if (dk->part == NULL)
ndisks--;
if (nextdisk == NULL) {
if (dk->part) {
while (ret = startdisk(dk, chkit) &&
nrun > 0)
sleep(10);
if (ret)
return (ret);
}
} else if (nrun < maxrun && nrun < ndisks) {
for ( ;; ) {
if ((nextdisk = nextdisk->next) == NULL)
nextdisk = disks;
if (nextdisk->part != NULL &&
nextdisk->pid == 0)
break;
}
while (ret = startdisk(nextdisk, chkit) &&
nrun > 0)
sleep(10);
if (ret)
return (ret);
}
}
}
if (sumstatus) {
if (badlist == 0)
return (sumstatus);
fprintf(stderr, "THE FOLLOWING FILE SYSTEM%s HAD AN %s\n\t",
badlist->next ? "S" : "", "UNEXPECTED INCONSISTENCY:");
for (pt = badlist; pt; pt = pt->next)
fprintf(stderr, "%s (%s)%s", pt->name, pt->fsname,
pt->next ? ", " : "\n");
return (sumstatus);
}
(void)endfsent();
return (0);
}
struct disk *
finddisk(name)
char *name;
{
register struct disk *dk, **dkp;
register char *p;
size_t len;
for (p = name + strlen(name) - 1; p >= name; --p)
if (isdigit(*p)) {
len = p - name + 1;
break;
}
if (p < name)
len = strlen(name);
for (dk = disks, dkp = &disks; dk; dkp = &dk->next, dk = dk->next) {
if (strncmp(dk->name, name, len) == 0 &&
dk->name[len] == 0)
return (dk);
}
if ((*dkp = (struct disk *)malloc(sizeof(struct disk))) == NULL) {
fprintf(stderr, "out of memory");
exit (8);
}
dk = *dkp;
if ((dk->name = malloc(len + 1)) == NULL) {
fprintf(stderr, "out of memory");
exit (8);
}
(void)strncpy(dk->name, name, len);
dk->name[len] = '\0';
dk->part = NULL;
dk->next = NULL;
dk->pid = 0;
ndisks++;
return (dk);
}
addpart(name, fsname, auxdata)
char *name, *fsname;
long auxdata;
{
struct disk *dk = finddisk(name);
register struct part *pt, **ppt = &dk->part;
for (pt = dk->part; pt; ppt = &pt->next, pt = pt->next)
if (strcmp(pt->name, name) == 0) {
printf("%s in fstab more than once!\n", name);
return;
}
if ((*ppt = (struct part *)malloc(sizeof(struct part))) == NULL) {
fprintf(stderr, "out of memory");
exit (8);
}
pt = *ppt;
if ((pt->name = malloc(strlen(name) + 1)) == NULL) {
fprintf(stderr, "out of memory");
exit (8);
}
(void)strcpy(pt->name, name);
if ((pt->fsname = malloc(strlen(fsname) + 1)) == NULL) {
fprintf(stderr, "out of memory");
exit (8);
}
(void)strcpy(pt->fsname, fsname);
pt->next = NULL;
pt->auxdata = auxdata;
}
startdisk(dk, checkit)
register struct disk *dk;
int (*checkit)();
{
register struct part *pt = dk->part;
dk->pid = fork();
if (dk->pid < 0) {
perror("fork");
return (8);
}
if (dk->pid == 0)
exit((*checkit)(pt->name, pt->fsname, pt->auxdata));
nrun++;
return (0);
}
char *
blockcheck(name)
char *name;
{
struct stat stslash, stblock, stchar;
char *raw;
int retried = 0;
hotroot = 0;
if (stat("/", &stslash) < 0) {
perror("/");
printf("Can't stat root\n");
return (0);
}
retry:
if (stat(name, &stblock) < 0) {
perror(name);
printf("Can't stat %s\n", name);
return (0);
}
if ((stblock.st_mode & S_IFMT) == S_IFBLK) {
if (stslash.st_dev == stblock.st_rdev)
hotroot++;
raw = rawname(name);
if (stat(raw, &stchar) < 0) {
perror(raw);
printf("Can't stat %s\n", raw);
return (name);
}
if ((stchar.st_mode & S_IFMT) == S_IFCHR) {
return (raw);
} else {
printf("%s is not a character device\n", raw);
return (name);
}
} else if ((stblock.st_mode & S_IFMT) == S_IFCHR && !retried) {
name = unrawname(name);
retried++;
goto retry;
}
printf("Can't make sense out of name %s\n", name);
return (0);
}
char *
unrawname(name)
char *name;
{
char *dp;
struct stat stb;
if ((dp = rindex(name, '/')) == 0)
return (name);
if (stat(name, &stb) < 0)
return (name);
if ((stb.st_mode & S_IFMT) != S_IFCHR)
return (name);
if (*(dp + 1) != 'r')
return (name);
(void)strcpy(dp + 1, dp + 2);
return (name);
}
char *
rawname(name)
char *name;
{
static char rawbuf[32];
char *dp;
if ((dp = rindex(name, '/')) == 0)
return (0);
*dp = 0;
(void)strcpy(rawbuf, name);
*dp = '/';
(void)strcat(rawbuf, "/r");
(void)strcat(rawbuf, dp + 1);
return (rawbuf);
}
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.