utilities.c

/*-
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * Copyright (c) 1980, 1986, 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.
 */

#include <sys/param.h>
#include <sys/types.h>
#include <sys/stat.h>

#include <ufs/ufs/dinode.h>
#include <ufs/ufs/dir.h>
#include <ufs/ffs/fs.h>

#include <errno.h>
#include <string.h>
#include <fstab.h>
#include <paths.h>
#include <stdio.h>

#include "fsck.h"


char *
blockcheck(char *origname)
{
	struct stat stblock;
	char *newname, *cp;
	struct fstab *fsinfo;
	int retried = 0, len;
	static char device[MAXPATHLEN];

	newname = origname;
	if (stat(newname, &stblock) < 0) {
		cp = strrchr(newname, '/');
		if (cp == NULL) {
			(void)snprintf(device, sizeof(device), "%s%s",
				_PATH_DEV, newname);
			newname = device;
		}
	}
retry:
	if (stat(newname, &stblock) < 0) {
		printf("Can't stat %s: %s\n", newname, strerror(errno));
		return (origname);
	}
	switch(stblock.st_mode & S_IFMT) {
	case S_IFCHR:
	case S_IFBLK:
		return(newname);
	case S_IFDIR:
		if (retried)
			break;

		len = strlen(origname) - 1;
		if (len > 0 && origname[len] == '/')
			/* remove trailing slash */
			origname[len] = '\0';
		if ((fsinfo = getfsfile(origname)) == NULL) {
			printf(
			    "Can't resolve %s to character special device.\n",
			    origname);
			return (origname);
		}
		newname = fsinfo->fs_spec;
		retried++;
		goto retry;
	}
	/*
	 * Not a block or character device, just return name and
	 * let the user decide whether to use it.
	 */
	return (origname);
}