279 lines
5.3 KiB
C
279 lines
5.3 KiB
C
/* $OpenBSD: fsutil.c,v 1.24 2019/06/28 13:32:43 deraadt Exp $ */
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/* $NetBSD: fsutil.c,v 1.2 1996/10/03 20:06:31 christos 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 <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 <limits.h>
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#include <err.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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static const char *dev = NULL;
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static const char *origdev = NULL;
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static int hot = 0;
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static int preen = 0;
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extern char *__progname;
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static void vmsg(int, const char *, va_list);
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struct stat stslash;
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void
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checkroot(void)
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{
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if (stat("/", &stslash) == -1) {
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xperror("/");
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printf("Can't stat root\n");
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}
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}
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void
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setcdevname(const char *cd, const char *ocd, int pr)
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{
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dev = cd;
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origdev = ocd;
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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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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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exit(8);
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}
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static void
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vmsg(int fatal, const char *fmt, va_list ap)
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{
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if (!fatal && preen) {
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if (origdev)
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printf("%s (%s): ", dev, origdev);
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else
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printf("%s: ", dev);
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}
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(void) vprintf(fmt, ap);
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if (fatal && preen) {
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printf("\n");
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if (origdev)
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printf("%s (%s): ", dev, origdev);
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else
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printf("%s: ", dev);
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printf("UNEXPECTED INCONSISTENCY; RUN %s MANUALLY.\n",
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__progname);
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exit(8);
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}
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}
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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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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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xperror(const char *s)
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{
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pfatal("%s (%s)", s, strerror(errno));
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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(8);
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}
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char *
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unrawname(char *name)
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{
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char *dp;
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struct stat stb;
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if ((dp = strrchr(name, '/')) == NULL)
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return (name);
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if (stat(name, &stb) == -1)
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return (name);
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if (!S_ISCHR(stb.st_mode))
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return (name);
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if (dp[1] != 'r')
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return (name);
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(void)memmove(&dp[1], &dp[2], strlen(&dp[2]) + 1);
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return (name);
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}
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char *
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rawname(char *name)
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{
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static char rawbuf[PATH_MAX];
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char *dp;
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if ((dp = strrchr(name, '/')) == NULL)
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return (0);
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*dp = 0;
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(void)strlcpy(rawbuf, name, sizeof rawbuf);
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*dp = '/';
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(void)strlcat(rawbuf, "/r", sizeof rawbuf);
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(void)strlcat(rawbuf, &dp[1], sizeof rawbuf);
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return (rawbuf);
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}
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char *
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blockcheck(char *origname)
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{
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struct stat stblock, stchar;
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char *newname, *raw;
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struct fstab *fsp;
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int retried = 0;
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hot = 0;
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newname = origname;
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retry:
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if (stat(newname, &stblock) == -1)
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return (origname);
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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 = rawname(newname);
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if (stat(raw, &stchar) == -1) {
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xperror(raw);
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printf("Can't stat %s\n", 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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printf("%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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newname = unrawname(newname);
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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 = fsp->fs_spec;
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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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void *
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emalloc(size_t s)
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{
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void *p;
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if (s == 0)
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err(1, "malloc failed");
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p = malloc(s);
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if (p == NULL)
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err(1, "malloc failed");
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return p;
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}
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void *
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ereallocarray(void *p, size_t n, size_t s)
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{
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void *newp;
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if (n == 0 || s == 0) {
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free(p);
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err(1, "realloc failed");
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}
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newp = reallocarray(p, n, s);
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if (newp == NULL) {
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free(p);
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err(1, "realloc failed");
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}
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return newp;
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}
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char *
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estrdup(const char *s)
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{
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char *p = strdup(s);
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if (p == NULL)
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err(1, "strdup failed");
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return p;
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}
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