+/*
+ * 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 the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by the University of California, Berkeley. The name of the
+ * University may not 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 5.1 (Berkeley) %G%";
+#endif /* not lint */
+
+#include <sys/param.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+#include <fstab.h>
+#include <strings.h>
+#include <stdio.h>
+#include <ctype.h>
+
+char *rawname(), *unrawname(), *blockcheck(), *malloc();
+
+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, 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;
+ int 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((unsigned int)len + 1)) == NULL) {
+ fprintf(stderr, "out of memory");
+ exit (8);
+ }
+ 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((unsigned int)strlen(name) + 1)) == NULL) {
+ fprintf(stderr, "out of memory");
+ exit (8);
+ }
+ strcpy(pt->name, name);
+ if ((pt->fsname = malloc((unsigned int)strlen(fsname) + 1)) == NULL) {
+ fprintf(stderr, "out of memory");
+ exit (8);
+ }
+ 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);
+}
projects / unix-history / commitdiff