303 lines
6.3 KiB
C
303 lines
6.3 KiB
C
/* $NetBSD: fsutil.c,v 1.26 2015/06/21 04:01:40 dholland Exp $ */
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/*
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__RCSID("$NetBSD: fsutil.c,v 1.26 2015/06/21 04:01:40 dholland Exp $");
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#endif /* not lint */
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/*
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* used by sbin/fsck
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* used by sbin/fsck_ext2fs
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* used by sbin/fsck_ffs
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* used by sbin/fsck_lfs
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* used by sbin/fsck_msdos
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* used by sbin/fsck_v7fs
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* used by sbin/fsdb
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* used by usr.sbin/quotacheck
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*/
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#include <sys/param.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <errno.h>
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#include <fstab.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <err.h>
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#include <util.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include "fsutil.h"
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#include "exitvalues.h"
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volatile sig_atomic_t returntosingle;
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static const char *dev = NULL;
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static int hot = 0;
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static int preen = 0;
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int quiet;
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#define F_ERROR 0x80000000
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void
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setcdevname(const char *cd, int pr)
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{
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dev = cd;
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preen = pr;
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}
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const char *
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cdevname(void)
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{
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return dev;
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}
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int
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hotroot(void)
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{
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return hot;
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}
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/*VARARGS*/
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void
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errexit(const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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(void) vfprintf(stderr, fmt, ap);
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va_end(ap);
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(void)fprintf(stderr, "\n");
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exit(FSCK_EXIT_CHECK_FAILED);
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}
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void
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vmsg(int fatal, const char *fmt, va_list ap)
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{
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int serr = fatal & F_ERROR;
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int serrno = errno;
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fatal &= ~F_ERROR;
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if (!fatal && preen)
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(void)printf("%s: ", dev);
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if (quiet && !preen) {
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(void)printf("** %s (vmsg)\n", dev);
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quiet = 0;
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}
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(void) vprintf(fmt, ap);
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if (serr)
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printf(" (%s)", strerror(serrno));
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if (fatal && preen)
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(void) printf("\n");
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if (fatal && preen) {
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(void) printf(
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"%s: UNEXPECTED INCONSISTENCY; RUN %s MANUALLY.\n",
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dev, getprogname());
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exit(FSCK_EXIT_CHECK_FAILED);
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}
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}
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/*VARARGS*/
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void
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pfatal(const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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vmsg(1, fmt, ap);
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va_end(ap);
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}
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/*VARARGS*/
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void
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pwarn(const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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vmsg(0, fmt, ap);
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va_end(ap);
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}
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void
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perr(const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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vmsg(1 | F_ERROR, fmt, ap);
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va_end(ap);
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}
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void
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panic(const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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vmsg(1, fmt, ap);
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va_end(ap);
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exit(FSCK_EXIT_CHECK_FAILED);
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}
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const char *
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blockcheck(const char *origname)
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{
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struct stat stslash, stblock, stchar;
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const char *newname, *raw, *cooked;
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struct fstab *fsp;
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int retried = 0;
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ssize_t len;
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char cbuf[MAXPATHLEN];
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static char buf[MAXPATHLEN];
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hot = 0;
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if (stat("/", &stslash) < 0) {
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perr("Can't stat `/'");
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return (origname);
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}
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len = readlink(origname, cbuf, sizeof(cbuf)-1);
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if (len == -1) {
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newname = origname;
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} else {
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cbuf[len] = '\0';
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newname = cbuf;
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}
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retry:
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if (stat(newname, &stblock) < 0) {
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perr("Can't stat `%s'", newname);
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return origname;
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}
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if (S_ISBLK(stblock.st_mode)) {
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if (stslash.st_dev == stblock.st_rdev)
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hot++;
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raw = getdiskrawname(buf, sizeof(buf), newname);
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if (raw == NULL) {
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perr("Can't convert to raw `%s'", newname);
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return origname;
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}
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if (stat(raw, &stchar) < 0) {
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perr("Can't stat `%s'", raw);
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return origname;
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}
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if (S_ISCHR(stchar.st_mode)) {
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return raw;
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} else {
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perr("%s is not a character device\n", raw);
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return origname;
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}
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} else if (S_ISCHR(stblock.st_mode) && !retried) {
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cooked = getdiskcookedname(cbuf, sizeof(cbuf), newname);
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if (cooked == NULL) {
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perr("Can't convert to cooked `%s'", newname);
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return origname;
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} else
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newname = cooked;
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retried++;
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goto retry;
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} else if ((fsp = getfsfile(newname)) != 0 && !retried) {
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newname = getfsspecname(cbuf, sizeof(cbuf), fsp->fs_spec);
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if (newname == NULL)
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perr("%s", buf);
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retried++;
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goto retry;
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}
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/*
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* Not a block or character device, just return name and
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* let the user decide whether to use it.
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*/
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return origname;
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}
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const char *
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print_mtime(time_t t)
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{
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static char b[128];
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char *p = ctime(&t);
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if (p != NULL)
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(void)snprintf(b, sizeof(b), "%12.12s %4.4s ", &p[4], &p[20]);
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else
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(void)snprintf(b, sizeof(b), "%lld ", (long long)t);
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return b;
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}
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void
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catch(int n)
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{
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if (ckfinish) (*ckfinish)(0);
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_exit(FSCK_EXIT_SIGNALLED);
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}
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/*
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* When preening, allow a single quit to signal
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* a special exit after filesystem checks complete
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* so that reboot sequence may be interrupted.
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*/
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void
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catchquit(int n)
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{
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static const char msg[] =
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"returning to single-user after filesystem check\n";
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int serrno = errno;
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(void)write(STDOUT_FILENO, msg, sizeof(msg) - 1);
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returntosingle = 1;
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(void)signal(SIGQUIT, SIG_DFL);
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errno = serrno;
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}
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/*
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* Ignore a single quit signal; wait and flush just in case.
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* Used by child processes in preen.
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*/
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void
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voidquit(int n)
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{
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int serrno = errno;
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sleep(1);
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(void)signal(SIGQUIT, SIG_IGN);
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(void)signal(SIGQUIT, SIG_DFL);
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errno = serrno;
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}
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