xref: /src/sbin/fsdb/fsdbutil.c

/*	$NetBSD: fsdbutil.c,v 1.24 2022/11/17 06:40:38 chs Exp $	*/

/*-
 * Copyright (c) 1996 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by John T. Kohl.
 *
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: fsdbutil.c,v 1.24 2022/11/17 06:40:38 chs Exp $");
#endif /* not lint */

#include <sys/types.h>
#include <sys/stat.h>
#include <sys/param.h>
#include <sys/time.h>
#include <sys/mount.h>
#include <fcntl.h>
#include <grp.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <err.h>

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

#include "fsdb.h"
#include "fsck.h"

char  **
crack(char *line, int *argc)
{
	static char *argv[8];
	int     i;
	char   *p, *val;
	for (p = line, i = 0; p != NULL && i < 8; i++) {
		while ((val = strsep(&p, " \t\n")) != NULL && *val == '\0')
			 /**/ ;
		if (val)
			argv[i] = val;
		else
			break;
	}
	*argc = i;
	return argv;
}

int
argcount(struct cmdtable *cmdp, int argc, char *argv[])
{
	if (cmdp->minargc == cmdp->maxargc)
		warnx("command `%s' takes %u arguments", cmdp->cmd,
		    cmdp->minargc - 1);
	else
		warnx("command `%s' takes from %u to %u arguments",
		    cmdp->cmd, cmdp->minargc - 1, cmdp->maxargc - 1);

	warnx("usage: %s: %s", cmdp->cmd, cmdp->helptxt);
	return 1;
}

void
printstat(const char *cp, ino_t inum, union dinode *dp)
{
	struct group *grp;
	struct passwd *pw;
	time_t  t;
	char   *p;
	uint64_t size, blocks;
	uint32_t extsize;
	uint16_t mode;
	uint32_t rdev;
	uint32_t uid, gid;

	size = iswap64(DIP(dp, size));
	extsize = is_ufs2 ? iswap32(dp->dp2.di_extsize) : 0;
	blocks = is_ufs2 ? iswap64(DIP(dp, blocks)) : iswap32(DIP(dp, blocks));
	mode = iswap16(DIP(dp, mode));
	rdev = iswap32(DIP(dp, rdev));

	printf("%s: ", cp);
	switch (mode & IFMT) {
	case IFDIR:
		puts("directory");
		break;
	case IFREG:
		puts("regular file");
		break;
	case IFBLK:
		printf("block special (%llu,%llu)",
		    (unsigned long long)major(rdev),
		    (unsigned long long)minor(rdev));
		break;
	case IFCHR:
		printf("character special (%llu,%llu)",
		    (unsigned long long)major(rdev),
		    (unsigned long long)minor(rdev));
		break;
	case IFLNK:
		fputs("symlink", stdout);
		if (size > 0 && size < (uint64_t)sblock->fs_maxsymlinklen &&
		    DIP(dp, blocks) == 0) {
			p = is_ufs2 ? (char *)dp->dp2.di_db :
			    (char *)dp->dp1.di_db;
			printf(" to `%.*s'\n", (int)size, p);
		} else
			putchar('\n');
		break;
	case IFSOCK:
		puts("socket");
		break;
	case IFIFO:
		puts("fifo");
		break;
	}
	printf("I=%llu MODE=%o SIZE=%llu EXTSIZE=%u", (unsigned long long)inum,
	    mode, (unsigned long long)size, extsize);
	t = is_ufs2 ? iswap64(dp->dp2.di_mtime) : iswap32(dp->dp1.di_mtime);
	p = ctime(&t);
	printf("\n\t    MTIME=%15.15s %4.4s [%d nsec]", &p[4], &p[20],
	    iswap32(DIP(dp, mtimensec)));
	t = is_ufs2 ? iswap64(dp->dp2.di_ctime) : iswap32(dp->dp1.di_ctime);
	p = ctime(&t);
	printf("\n\t    CTIME=%15.15s %4.4s [%d nsec]", &p[4], &p[20],
	    iswap32(DIP(dp, ctimensec)));
	t = is_ufs2 ? iswap64(dp->dp2.di_atime) : iswap32(dp->dp1.di_atime);
	p = ctime(&t);
	printf("\n\t    ATIME=%15.15s %4.4s [%d nsec]", &p[4], &p[20],
	    iswap32(DIP(dp,atimensec)));
	if (is_ufs2) {
		t = iswap64(dp->dp2.di_birthtime);
		p = ctime(&t);
		printf("\n\tBIRTHTIME=%15.15s %4.4s [%d nsec]\n", &p[4], &p[20],
		    iswap32(dp->dp2.di_birthnsec));
	} else {
		printf("\n");
	}

	if (!is_ufs2 && sblock->fs_old_inodefmt < FS_44INODEFMT)
		uid = iswap16(dp->dp1.di_ouid);
	else
		uid = iswap32(DIP(dp, uid));
	if ((pw = getpwuid(uid)) != NULL)
		printf("OWNER=%s ", pw->pw_name);
	else
		printf("OWNUID=%u ", uid);
	if (!is_ufs2 && sblock->fs_old_inodefmt < FS_44INODEFMT)
		gid = iswap16(dp->dp1.di_ogid);
	else
		gid = iswap32(DIP(dp, gid));
	if ((grp = getgrgid(gid)) != NULL)
		printf("GRP=%s ", grp->gr_name);
	else
		printf("GID=%u ", gid);

	printf("LINKCNT=%hd FLAGS=0x%x BLKCNT=0x%llx GEN=0x%x\n",
		iswap16(DIP(dp, nlink)),
	    iswap32(DIP(dp, flags)), (unsigned long long)blocks,
		iswap32(DIP(dp, gen)));
}

int
checkactive(void)
{
	if (!curinode) {
		warnx("no current inode");
		return 0;
	}
	return 1;
}

int
checkactivedir(void)
{
	if (!curinode) {
		warnx("no current inode");
		return 0;
	}
	if ((iswap16(DIP(curinode, mode)) & IFMT) != IFDIR) {
		warnx("inode %llu not a directory",
		    (unsigned long long)curinum);
		return 0;
	}
	return 1;
}

int
printactive(void)
{
	uint16_t mode;

	if (!checkactive())
		return 1;
	mode = iswap16(DIP(curinode, mode));
	switch (mode & IFMT) {
	case IFDIR:
	case IFREG:
	case IFBLK:
	case IFCHR:
	case IFLNK:
	case IFSOCK:
	case IFIFO:
		printstat("current inode", curinum, curinode);
		break;
	case 0:
		printf("current inode %llu: unallocated inode\n",
		    (unsigned long long)curinum);
		break;
	default:
		printf("current inode %llu: screwy itype 0%o (mode 0%o)?\n",
		    (unsigned long long)curinum, mode & IFMT, mode);
		break;
	}
	return 0;
}