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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	sbin/restore/dirs.c	Lines:	0	305	0.0 %
Date:	2017-11-07	Branches:	0	210	0.0 %


/*	$OpenBSD: dirs.c,v 1.41 2015/08/25 04:18:43 guenther Exp $	*/
/*	$NetBSD: dirs.c,v 1.26 1997/07/01 05:37:49 lukem Exp $	*/

/*
 * Copyright (c) 1983, 1993
 *	The Regents of the University of California.  All rights reserved.
 * (c) UNIX System Laboratories, Inc.
 * All or some portions of this file are derived from material licensed
 * to the University of California by American Telephone and Telegraph
 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
 * the permission of UNIX System Laboratories, Inc.
 *
 * 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/stat.h>
#include <sys/time.h>

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

#include <endian.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <paths.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <limits.h>

#include "restore.h"
#include "extern.h"

/*
 * Symbol table of directories read from tape.
 */
#define HASHSIZE	1000
#define INOHASH(val) (val % HASHSIZE)
struct inotab {
	struct	inotab *t_next;
	ino_t	t_ino;
	int32_t	t_seekpt;
	int32_t	t_size;
};
static struct inotab *inotab[HASHSIZE];

/*
 * Information retained about directories.
 */
struct modeinfo {
	ino_t ino;
	struct timespec ctimep[2];
	struct timespec mtimep[2];
	mode_t mode;
	uid_t uid;
	gid_t gid;
	u_int flags;
};

/*
 * Definitions for library routines operating on directories.
 */
#undef DIRBLKSIZ
#define DIRBLKSIZ 1024
struct rstdirdesc {
	int	dd_fd;
	int32_t	dd_loc;
	int32_t	dd_size;
	char	dd_buf[DIRBLKSIZ];
};

/*
 * Global variables for this file.
 */
static long	seekpt;
static FILE	*df, *mf;
static RST_DIR	*dirp;
static char	dirfile[PATH_MAX] = "#";	/* No file */
static char	modefile[PATH_MAX] = "#";	/* No file */
static char	dot[2] = ".";			/* So it can be modified */

/*
 * Format of old style directories.
 */
#define ODIRSIZ 14
struct odirect {
	u_short	d_ino;
	char	d_name[ODIRSIZ];
};

static struct inotab	*allocinotab(FILE *, struct context *, long);
static void		 dcvt(struct odirect *, struct direct *);
static void		 flushent(void);
static struct inotab	*inotablookup(ino_t);
static RST_DIR		*opendirfile(const char *);
static void		 putdir(char *, size_t);
static void		 putent(struct direct *);
static void		 rst_seekdir(RST_DIR *, long, long);
static long		 rst_telldir(RST_DIR *);
static struct direct	*searchdir(ino_t, char *);

/*
 *	Extract directory contents, building up a directory structure
 *	on disk for extraction by name.
 *	If genmode is requested, save mode, owner, and times for all
 *	directories on the tape.
 */
void
extractdirs(int genmode)
{
	int i;
	struct inotab *itp;
	struct direct nulldir;
	int fd;

	Vprintf(stdout, "Extract directories from tape\n");
	(void)snprintf(dirfile, sizeof(dirfile), "%s/rstdir%lld", tmpdir,
	    (long long)dumpdate);
	if (command != 'r' && command != 'R') {
		strlcat(dirfile, "-XXXXXXXXXX", sizeof(dirfile));
		fd = mkstemp(dirfile);
	} else
		fd = open(dirfile, O_RDWR|O_CREAT|O_EXCL, 0666);
	if (fd == -1 || (df = fdopen(fd, "w")) == NULL) {
		int saved_errno = errno;
		if (fd != -1)
			close(fd);
		errc(1, saved_errno,
		    "cannot create directory temporary %s", dirfile);
	}
	if (genmode != 0) {
		(void)snprintf(modefile, sizeof(modefile), "%s/rstmode%lld",
		    tmpdir, (long long)dumpdate);
		if (command != 'r' && command != 'R') {
			strlcat(modefile, "-XXXXXXXXXX", sizeof(modefile));
			fd = mkstemp(modefile);
		} else
			fd = open(modefile, O_RDWR|O_CREAT|O_EXCL, 0666);
		if (fd == -1 || (mf = fdopen(fd, "w")) == NULL) {
			int saved_errno = errno;
			if (fd != -1)
				close(fd);
			errc(1, saved_errno,
			    "cannot create modefile %s", modefile);
		}
	}
	nulldir.d_ino = 0;
	nulldir.d_type = DT_DIR;
	nulldir.d_namlen = 1;
	nulldir.d_name[0] = '/';
	nulldir.d_name[1] = '\0';
	nulldir.d_reclen = DIRSIZ(0, &nulldir);
	for (;;) {
		curfile.name = "<directory file - name unknown>";
		curfile.action = USING;
		if (curfile.mode == 0 || (curfile.mode & IFMT) != IFDIR) {
			(void)fclose(df);
			dirp = opendirfile(dirfile);
			if (dirp == NULL)
				warn("opendirfile");
			if (mf != NULL)
				(void)fclose(mf);
			i = dirlookup(dot);
			if (i == 0)
				panic("Root directory is not on tape\n");
			return;
		}
		itp = allocinotab(mf, &curfile, seekpt);
		getfile(putdir, xtrnull);
		putent(&nulldir);
		flushent();
		itp->t_size = seekpt - itp->t_seekpt;
	}
}

/*
 * skip over all the directories on the tape
 */
void
skipdirs(void)
{

	while (curfile.ino && (curfile.mode & IFMT) == IFDIR) {
		skipfile();
	}
}

/*
 *	Recursively find names and inumbers of all files in subtree
 *	pname and pass them off to be processed.
 */
void
treescan(char *pname, ino_t ino, long (*todo)(char *, ino_t, int))
{
	struct inotab *itp;
	struct direct *dp;
	size_t namelen;
	long bpt;
	char locname[PATH_MAX + 1];

	itp = inotablookup(ino);
	if (itp == NULL) {
		/*
		 * Pname is name of a simple file or an unchanged directory.
		 */
		(void)(*todo)(pname, ino, LEAF);
		return;
	}
	/*
	 * Pname is a dumped directory name.
	 */
	if ((*todo)(pname, ino, NODE) == FAIL)
		return;
	/*
	 * begin search through the directory
	 * skipping over "." and ".."
	 */
	namelen = strlcpy(locname, pname, sizeof(locname));
	if (namelen >= sizeof(locname) - 1)
		namelen = sizeof(locname) - 2;
	locname[namelen++] = '/';
	locname[namelen] = '\0';
	rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
	dp = rst_readdir(dirp); /* "." */
	if (dp != NULL && strcmp(dp->d_name, ".") == 0)
		dp = rst_readdir(dirp); /* ".." */
	else
		fprintf(stderr, "Warning: `.' missing from directory %s\n",
			pname);
	if (dp != NULL && strcmp(dp->d_name, "..") == 0)
		dp = rst_readdir(dirp); /* first real entry */
	else
		fprintf(stderr, "Warning: `..' missing from directory %s\n",
			pname);
	bpt = rst_telldir(dirp);
	/*
	 * a zero inode signals end of directory
	 */
	while (dp != NULL) {
		locname[namelen] = '\0';
		if (namelen + dp->d_namlen >= sizeof(locname)) {
			fprintf(stderr, "%s%s: name exceeds %zd char\n",
				locname, dp->d_name, sizeof(locname) - 1);
		} else {
			(void)strlcat(locname, dp->d_name, sizeof(locname));
			treescan(locname, dp->d_ino, todo);
			rst_seekdir(dirp, bpt, itp->t_seekpt);
		}
		dp = rst_readdir(dirp);
		bpt = rst_telldir(dirp);
	}
}

/*
 * Lookup a pathname which is always assumed to start from the ROOTINO.
 */
struct direct *
pathsearch(const char *pathname)
{
	ino_t ino;
	struct direct *dp;
	char *path, *name, buffer[PATH_MAX];

	strlcpy(buffer, pathname, sizeof buffer);
	path = buffer;
	ino = ROOTINO;
	while (*path == '/')
		path++;
	dp = NULL;
	while ((name = strsep(&path, "/")) != NULL && *name != '\0') {
		if ((dp = searchdir(ino, name)) == NULL)
			return (NULL);
		ino = dp->d_ino;
	}
	return (dp);
}

/*
 * Lookup the requested name in directory inum.
 * Return its inode number if found, zero if it does not exist.
 */
static struct direct *
searchdir(ino_t inum, char *name)
{
	struct direct *dp;
	struct inotab *itp;
	int len;

	itp = inotablookup(inum);
	if (itp == NULL)
		return (NULL);
	rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
	len = strlen(name);
	do {
		dp = rst_readdir(dirp);
		if (dp == NULL)
			return (NULL);
	} while (dp->d_namlen != len || strncmp(dp->d_name, name, len) != 0);
	return (dp);
}

/*
 * Put the directory entries in the directory file
 */
static void
putdir(char *buf, size_t size)
{
	struct direct cvtbuf;
	struct odirect *odp;
	struct odirect *eodp;
	struct direct *dp;
	size_t loc, i;

	if (cvtflag) {
		eodp = (struct odirect *)&buf[size];
		for (odp = (struct odirect *)buf; odp < eodp; odp++)
			if (odp->d_ino != 0) {
				dcvt(odp, &cvtbuf);
				putent(&cvtbuf);
			}
	} else {
		for (loc = 0; loc < size; ) {
			dp = (struct direct *)(buf + loc);
			if (Bcvt) {
				dp->d_ino = swap32(dp->d_ino);
				dp->d_reclen = swap16(dp->d_reclen);
			}
			if (oldinofmt && dp->d_ino != 0) {
#				if BYTE_ORDER == BIG_ENDIAN
					if (Bcvt)
						dp->d_namlen = dp->d_type;
#				else
					if (!Bcvt)
						dp->d_namlen = dp->d_type;
#				endif
				dp->d_type = DT_UNKNOWN;
			}
			i = DIRBLKSIZ - (loc & (DIRBLKSIZ - 1));
			if ((dp->d_reclen & 0x3) != 0 ||
			    dp->d_reclen > i ||
			    dp->d_reclen < DIRSIZ(0, dp) ||
			    dp->d_namlen > NAME_MAX) {
				Vprintf(stdout, "Mangled directory: ");
				if ((dp->d_reclen & 0x3) != 0)
					Vprintf(stdout,
					   "reclen not multiple of 4 ");
				if (dp->d_reclen < DIRSIZ(0, dp))
					Vprintf(stdout,
					   "reclen less than DIRSIZ (%u < %u) ",
					   (unsigned)dp->d_reclen,
					   (unsigned)DIRSIZ(0, dp));
				if (dp->d_namlen > NAME_MAX)
					Vprintf(stdout,
					   "reclen name too big (%u > %u) ",
					   (unsigned)dp->d_namlen, NAME_MAX);
				Vprintf(stdout, "\n");
				loc += i;
				continue;
			}
			loc += dp->d_reclen;
			if (dp->d_ino != 0) {
				putent(dp);
			}
		}
	}
}

/*
 * These variables are "local" to the following two functions.
 */
char dirbuf[DIRBLKSIZ];
long dirloc = 0;
long prev = 0;

/*
 * add a new directory entry to a file.
 */
static void
putent(struct direct *dp)
{
	dp->d_reclen = DIRSIZ(0, dp);
	if (dirloc + dp->d_reclen > DIRBLKSIZ) {
		((struct direct *)(dirbuf + prev))->d_reclen =
		    DIRBLKSIZ - prev;
		(void)fwrite(dirbuf, 1, DIRBLKSIZ, df);
		dirloc = 0;
	}
	memcpy(dirbuf + dirloc, dp, dp->d_reclen);
	prev = dirloc;
	dirloc += dp->d_reclen;
}

/*
 * flush out a directory that is finished.
 */
static void
flushent(void)
{
	((struct direct *)(dirbuf + prev))->d_reclen = DIRBLKSIZ - prev;
	(void)fwrite(dirbuf, dirloc, 1, df);
	seekpt = ftell(df);
	dirloc = 0;
}

static void
dcvt(struct odirect *odp, struct direct *ndp)
{

	memset(ndp, 0, sizeof *ndp);
	if (Bcvt)
	    ndp->d_ino = swap16(odp->d_ino);
	else
	    ndp->d_ino = odp->d_ino;
	ndp->d_type = DT_UNKNOWN;
	(void)strncpy(ndp->d_name, odp->d_name, ODIRSIZ);
	ndp->d_namlen = strlen(ndp->d_name);
	ndp->d_reclen = DIRSIZ(0, ndp);
}

/*
 * Seek to an entry in a directory.
 * Only values returned by rst_telldir should be passed to rst_seekdir.
 * This routine handles many directories in a single file.
 * It takes the base of the directory in the file, plus
 * the desired seek offset into it.
 */
static void
rst_seekdir(RST_DIR *dirp, long loc, long base)
{

	if (loc == rst_telldir(dirp))
		return;
	loc -= base;
	if (loc < 0)
		fprintf(stderr, "bad seek pointer to rst_seekdir %ld\n", loc);
	(void)lseek(dirp->dd_fd, base + (loc & ~(DIRBLKSIZ - 1)), SEEK_SET);
	dirp->dd_loc = loc & (DIRBLKSIZ - 1);
	if (dirp->dd_loc != 0)
		dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ);
}

/*
 * get next entry in a directory.
 */
struct direct *
rst_readdir(RST_DIR *dirp)
{
	struct direct *dp;

	for (;;) {
		if (dirp->dd_loc == 0) {
			dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf,
			    DIRBLKSIZ);
			if (dirp->dd_size <= 0) {
				Dprintf(stderr, "error reading directory\n");
				return (NULL);
			}
		}
		if (dirp->dd_loc >= dirp->dd_size) {
			dirp->dd_loc = 0;
			continue;
		}
		dp = (struct direct *)(dirp->dd_buf + dirp->dd_loc);
		if (dp->d_reclen == 0 ||
		    dp->d_reclen > DIRBLKSIZ + 1 - dirp->dd_loc) {
			Dprintf(stderr, "corrupted directory: bad reclen %d\n",
				dp->d_reclen);
			return (NULL);
		}
		dirp->dd_loc += dp->d_reclen;
		if (dp->d_ino == 0 && strcmp(dp->d_name, "/") == 0)
			return (NULL);
		if (dp->d_ino >= maxino) {
			Dprintf(stderr, "corrupted directory: bad inum %llu\n",
			    (unsigned long long)dp->d_ino);
			continue;
		}
		return (dp);
	}
}

/*
 * Simulate the opening of a directory
 */
RST_DIR *
rst_opendir(const char *name)
{
	struct inotab *itp;
	RST_DIR *dirp;
	ino_t ino;

	if ((ino = dirlookup(name)) > 0 &&
	    (itp = inotablookup(ino)) != NULL) {
		dirp = opendirfile(dirfile);
		rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
		return (dirp);
	}
	return (NULL);
}

/*
 * In our case, there is nothing to do when closing a directory.
 */
void
rst_closedir(RST_DIR *dirp)
{
	(void)close(dirp->dd_fd);
	free(dirp);
	return;
}

/*
 * Simulate finding the current offset in the directory.
 */
static long
rst_telldir(RST_DIR *dirp)
{
	return ((long)lseek(dirp->dd_fd,
	    (off_t)0, SEEK_CUR) - dirp->dd_size + dirp->dd_loc);
}

/*
 * Open a directory file.
 */
static RST_DIR *
opendirfile(const char *name)
{
	RST_DIR *dirp;
	int fd;

	if ((fd = open(name, O_RDONLY)) == -1)
		return (NULL);
	if ((dirp = malloc(sizeof(RST_DIR))) == NULL) {
		(void)close(fd);
		return (NULL);
	}
	dirp->dd_fd = fd;
	dirp->dd_loc = 0;
	return (dirp);
}

/*
 * Set the mode, owner, and times for all new or changed directories
 */
void
setdirmodes(int flags)
{
	FILE *mf;
	struct modeinfo node;
	struct entry *ep;
	char *cp;

	Vprintf(stdout, "Set directory mode, owner, and times.\n");
	if (command == 'r' || command == 'R')
		(void)snprintf(modefile, sizeof(modefile), "%s/rstmode%lld",
		    tmpdir, (long long)dumpdate);
	if (modefile[0] == '#') {
		panic("modefile not defined\n");
		fputs("directory mode, owner, and times not set\n", stderr);
		return;
	}
	mf = fopen(modefile, "r");
	if (mf == NULL) {
		warn("fopen");
		fprintf(stderr, "cannot open mode file %s\n", modefile);
		fprintf(stderr, "directory mode, owner, and times not set\n");
		return;
	}
	clearerr(mf);
	for (;;) {
		(void)fread((char *)&node, 1, sizeof(struct modeinfo), mf);
		if (feof(mf))
			break;
		ep = lookupino(node.ino);
		if (command == 'i' || command == 'x') {
			if (ep == NULL)
				continue;
			if ((flags & FORCE) == 0 && ep->e_flags & EXISTED) {
				ep->e_flags &= ~NEW;
				continue;
			}
			if (node.ino == ROOTINO &&
		   	    reply("set owner/mode for '.'") == FAIL)
				continue;
		}
		if (ep == NULL) {
			panic("cannot find directory inode %llu\n",
			    (unsigned long long)node.ino);
		} else {
			if (!Nflag) {
				cp = myname(ep);
				(void)chown(cp, node.uid, node.gid);
				(void)chmod(cp, node.mode);
				(void)chflags(cp, node.flags);
				(void)utimensat(AT_FDCWD, cp, node.ctimep, 0);
				(void)utimensat(AT_FDCWD, cp, node.mtimep, 0);
			}
			ep->e_flags &= ~NEW;
		}
	}
	if (ferror(mf))
		panic("error setting directory modes\n");
	(void)fclose(mf);
}

/*
 * Generate a literal copy of a directory.
 */
int
genliteraldir(char *name, ino_t ino)
{
	struct inotab *itp;
	int ofile, dp, i, size;
	char buf[BUFSIZ];

	itp = inotablookup(ino);
	if (itp == NULL)
		panic("Cannot find directory inode %llu named %s\n",
		    (unsigned long long)ino, name);
	if ((ofile = open(name, O_WRONLY | O_CREAT | O_TRUNC, 0666)) < 0) {
		warn("%s: cannot create file", name);
		return (FAIL);
	}
	rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
	dp = dup(dirp->dd_fd);
	for (i = itp->t_size; i > 0; i -= BUFSIZ) {
		size = i < BUFSIZ ? i : BUFSIZ;
		if (read(dp, buf, size) == -1)
			err(1, "read error extracting inode %llu, name %s",
			    (unsigned long long)curfile.ino, curfile.name);
		xtrfile(buf, size);
	}
	(void)close(dp);
	(void)close(ofile);
	return (GOOD);
}

/*
 * Determine the type of an inode
 */
int
inodetype(ino_t ino)
{
	struct inotab *itp;

	itp = inotablookup(ino);
	if (itp == NULL)
		return (LEAF);
	return (NODE);
}

/*
 * Allocate and initialize a directory inode entry.
 * If requested, save its pertinent mode, owner, and time info.
 */
static struct inotab *
allocinotab(FILE *mf, struct context *ctxp, long seekpt)
{
	struct inotab	*itp;
	struct modeinfo node;

	itp = calloc(1, sizeof(struct inotab));
	if (itp == NULL)
		panic("no memory directory table\n");
	itp->t_next = inotab[INOHASH(ctxp->ino)];
	inotab[INOHASH(ctxp->ino)] = itp;
	itp->t_ino = ctxp->ino;
	itp->t_seekpt = seekpt;
	if (mf == NULL)
		return (itp);
	node.ino = ctxp->ino;
	node.mtimep[0].tv_sec = ctxp->atime_sec;
	node.mtimep[0].tv_nsec = ctxp->atime_nsec;
	node.mtimep[1].tv_sec = ctxp->mtime_sec;
	node.mtimep[1].tv_nsec = ctxp->mtime_nsec;
	node.ctimep[0].tv_sec = ctxp->atime_sec;
	node.ctimep[0].tv_nsec = ctxp->atime_nsec;
	node.ctimep[1].tv_sec = ctxp->birthtime_sec;
	node.ctimep[1].tv_nsec = ctxp->birthtime_nsec;
	node.mode = ctxp->mode;
	node.flags = ctxp->file_flags;
	node.uid = ctxp->uid;
	node.gid = ctxp->gid;
	(void)fwrite((char *)&node, 1, sizeof(struct modeinfo), mf);
	return (itp);
}

/*
 * Look up an inode in the table of directories
 */
static struct inotab *
inotablookup(ino_t ino)
{
	struct inotab *itp;

	for (itp = inotab[INOHASH(ino)]; itp != NULL; itp = itp->t_next)
		if (itp->t_ino == ino)
			return (itp);
	return (NULL);
}

/*
 * Clean up and exit
 */
void
cleanup(void)
{

	closemt();
	if (modefile[0] != '#')
		(void)unlink(modefile);
	if (dirfile[0] != '#')
		(void)unlink(dirfile);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: dirs.c,v 1.41 2015/08/25 04:18:43 guenther Exp $ */
2			/* $NetBSD: dirs.c,v 1.26 1997/07/01 05:37:49 lukem Exp $ */
3
4			/*
5			* Copyright (c) 1983, 1993
6			* The Regents of the University of California. All rights reserved.
7			* (c) UNIX System Laboratories, Inc.
8			* All or some portions of this file are derived from material licensed
9			* to the University of California by American Telephone and Telegraph
10			* Co. or Unix System Laboratories, Inc. and are reproduced herein with
11			* the permission of UNIX System Laboratories, Inc.
12			*
13			* Redistribution and use in source and binary forms, with or without
14			* modification, are permitted provided that the following conditions
15			* are met:
16			* 1. Redistributions of source code must retain the above copyright
17			* notice, this list of conditions and the following disclaimer.
18			* 2. Redistributions in binary form must reproduce the above copyright
19			* notice, this list of conditions and the following disclaimer in the
20			* documentation and/or other materials provided with the distribution.
21			* 3. Neither the name of the University nor the names of its contributors
22			* may be used to endorse or promote products derived from this software
23			* without specific prior written permission.
24			*
25			* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28			* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35			* SUCH DAMAGE.
36			*/
37
38			#include <sys/stat.h>
39			#include <sys/time.h>
40
41			#include <ufs/ffs/fs.h>
42			#include <ufs/ufs/dinode.h>
43			#include <ufs/ufs/dir.h>
44			#include <protocols/dumprestore.h>
45
46			#include <endian.h>
47			#include <err.h>
48			#include <errno.h>
49			#include <fcntl.h>
50			#include <paths.h>
51			#include <stdio.h>
52			#include <stdlib.h>
53			#include <string.h>
54			#include <unistd.h>
55			#include <limits.h>
56
57			#include "restore.h"
58			#include "extern.h"
59
60			/*
61			* Symbol table of directories read from tape.
62			*/
63			#define HASHSIZE 1000
64			#define INOHASH(val) (val % HASHSIZE)
65			struct inotab {
66			struct inotab *t_next;
67			ino_t t_ino;
68			int32_t t_seekpt;
69			int32_t t_size;
70			};
71			static struct inotab *inotab[HASHSIZE];
72
73			/*
74			* Information retained about directories.
75			*/
76			struct modeinfo {
77			ino_t ino;
78			struct timespec ctimep[2];
79			struct timespec mtimep[2];
80			mode_t mode;
81			uid_t uid;
82			gid_t gid;
83			u_int flags;
84			};
85
86			/*
87			* Definitions for library routines operating on directories.
88			*/
89			#undef DIRBLKSIZ
90			#define DIRBLKSIZ 1024
91			struct rstdirdesc {
92			int dd_fd;
93			int32_t dd_loc;
94			int32_t dd_size;
95			char dd_buf[DIRBLKSIZ];
96			};
97
98			/*
99			* Global variables for this file.
100			*/
101			static long seekpt;
102			static FILE df, mf;
103			static RST_DIR *dirp;
104			static char dirfile[PATH_MAX] = "#"; /* No file */
105			static char modefile[PATH_MAX] = "#"; /* No file */
106			static char dot[2] = "."; /* So it can be modified */
107
108			/*
109			* Format of old style directories.
110			*/
111			#define ODIRSIZ 14
112			struct odirect {
113			u_short d_ino;
114			char d_name[ODIRSIZ];
115			};
116
117			static struct inotab allocinotab(FILE , struct context *, long);
118			static void dcvt(struct odirect , struct direct );
119			static void flushent(void);
120			static struct inotab *inotablookup(ino_t);
121			static RST_DIR opendirfile(const char );
122			static void putdir(char *, size_t);
123			static void putent(struct direct *);
124			static void rst_seekdir(RST_DIR *, long, long);
125			static long rst_telldir(RST_DIR *);
126			static struct direct searchdir(ino_t, char );
127
128			/*
129			* Extract directory contents, building up a directory structure
130			* on disk for extraction by name.
131			* If genmode is requested, save mode, owner, and times for all
132			* directories on the tape.
133			*/
134			void
135			extractdirs(int genmode)
136			{
137			int i;
138			struct inotab *itp;
139			struct direct nulldir;
140			int fd;
141
142			Vprintf(stdout, "Extract directories from tape\n");
143			(void)snprintf(dirfile, sizeof(dirfile), "%s/rstdir%lld", tmpdir,
144			(long long)dumpdate);
145			if (command != 'r' && command != 'R') {
146			strlcat(dirfile, "-XXXXXXXXXX", sizeof(dirfile));
147			fd = mkstemp(dirfile);
148			} else
149			fd = open(dirfile, O_RDWR\|O_CREAT\|O_EXCL, 0666);
150			if (fd == -1 \|\| (df = fdopen(fd, "w")) == NULL) {
151			int saved_errno = errno;
152			if (fd != -1)
153			close(fd);
154			errc(1, saved_errno,
155			"cannot create directory temporary %s", dirfile);
156			}
157			if (genmode != 0) {
158			(void)snprintf(modefile, sizeof(modefile), "%s/rstmode%lld",
159			tmpdir, (long long)dumpdate);
160			if (command != 'r' && command != 'R') {
161			strlcat(modefile, "-XXXXXXXXXX", sizeof(modefile));
162			fd = mkstemp(modefile);
163			} else
164			fd = open(modefile, O_RDWR\|O_CREAT\|O_EXCL, 0666);
165			if (fd == -1 \|\| (mf = fdopen(fd, "w")) == NULL) {
166			int saved_errno = errno;
167			if (fd != -1)
168			close(fd);
169			errc(1, saved_errno,
170			"cannot create modefile %s", modefile);
171			}
172			}
173			nulldir.d_ino = 0;
174			nulldir.d_type = DT_DIR;
175			nulldir.d_namlen = 1;
176			nulldir.d_name[0] = '/';
177			nulldir.d_name[1] = '\0';
178			nulldir.d_reclen = DIRSIZ(0, &nulldir);
179			for (;;) {
180			curfile.name = "<directory file - name unknown>";
181			curfile.action = USING;
182			if (curfile.mode == 0 \|\| (curfile.mode & IFMT) != IFDIR) {
183			(void)fclose(df);
184			dirp = opendirfile(dirfile);
185			if (dirp == NULL)
186			warn("opendirfile");
187			if (mf != NULL)
188			(void)fclose(mf);
189			i = dirlookup(dot);
190			if (i == 0)
191			panic("Root directory is not on tape\n");
192			return;
193			}
194			itp = allocinotab(mf, &curfile, seekpt);
195			getfile(putdir, xtrnull);
196			putent(&nulldir);
197			flushent();
198			itp->t_size = seekpt - itp->t_seekpt;
199			}
200			}
201
202			/*
203			* skip over all the directories on the tape
204			*/
205			void
206			skipdirs(void)
207			{
208
209			while (curfile.ino && (curfile.mode & IFMT) == IFDIR) {
210			skipfile();
211			}
212			}
213
214			/*
215			* Recursively find names and inumbers of all files in subtree
216			* pname and pass them off to be processed.
217			*/
218			void
219			treescan(char pname, ino_t ino, long (todo)(char *, ino_t, int))
220			{
221			struct inotab *itp;
222			struct direct *dp;
223			size_t namelen;
224			long bpt;
225			char locname[PATH_MAX + 1];
226
227			itp = inotablookup(ino);
228			if (itp == NULL) {
229			/*
230			* Pname is name of a simple file or an unchanged directory.
231			*/
232			(void)(*todo)(pname, ino, LEAF);
233			return;
234			}
235			/*
236			* Pname is a dumped directory name.
237			*/
238			if ((*todo)(pname, ino, NODE) == FAIL)
239			return;
240			/*
241			* begin search through the directory
242			* skipping over "." and ".."
243			*/
244			namelen = strlcpy(locname, pname, sizeof(locname));
245			if (namelen >= sizeof(locname) - 1)
246			namelen = sizeof(locname) - 2;
247			locname[namelen++] = '/';
248			locname[namelen] = '\0';
249			rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
250			dp = rst_readdir(dirp); /* "." */
251			if (dp != NULL && strcmp(dp->d_name, ".") == 0)
252			dp = rst_readdir(dirp); /* ".." */
253			else
254			fprintf(stderr, "Warning: `.' missing from directory %s\n",
255			pname);
256			if (dp != NULL && strcmp(dp->d_name, "..") == 0)
257			dp = rst_readdir(dirp); /* first real entry */
258			else
259			fprintf(stderr, "Warning: `..' missing from directory %s\n",
260			pname);
261			bpt = rst_telldir(dirp);
262			/*
263			* a zero inode signals end of directory
264			*/
265			while (dp != NULL) {
266			locname[namelen] = '\0';
267			if (namelen + dp->d_namlen >= sizeof(locname)) {
268			fprintf(stderr, "%s%s: name exceeds %zd char\n",
269			locname, dp->d_name, sizeof(locname) - 1);
270			} else {
271			(void)strlcat(locname, dp->d_name, sizeof(locname));
272			treescan(locname, dp->d_ino, todo);
273			rst_seekdir(dirp, bpt, itp->t_seekpt);
274			}
275			dp = rst_readdir(dirp);
276			bpt = rst_telldir(dirp);
277			}
278			}
279
280			/*
281			* Lookup a pathname which is always assumed to start from the ROOTINO.
282			*/
283			struct direct *
284			pathsearch(const char *pathname)
285			{
286			ino_t ino;
287			struct direct *dp;
288			char path, name, buffer[PATH_MAX];
289
290			strlcpy(buffer, pathname, sizeof buffer);
291			path = buffer;
292			ino = ROOTINO;
293			while (*path == '/')
294			path++;
295			dp = NULL;
296			while ((name = strsep(&path, "/")) != NULL && *name != '\0') {
297			if ((dp = searchdir(ino, name)) == NULL)
298			return (NULL);
299			ino = dp->d_ino;
300			}
301			return (dp);
302			}
303
304			/*
305			* Lookup the requested name in directory inum.
306			* Return its inode number if found, zero if it does not exist.
307			*/
308			static struct direct *
309			searchdir(ino_t inum, char *name)
310			{
311			struct direct *dp;
312			struct inotab *itp;
313			int len;
314
315			itp = inotablookup(inum);
316			if (itp == NULL)
317			return (NULL);
318			rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
319			len = strlen(name);
320			do {
321			dp = rst_readdir(dirp);
322			if (dp == NULL)
323			return (NULL);
324			} while (dp->d_namlen != len \|\| strncmp(dp->d_name, name, len) != 0);
325			return (dp);
326			}
327
328			/*
329			* Put the directory entries in the directory file
330			*/
331			static void
332			putdir(char *buf, size_t size)
333			{
334			struct direct cvtbuf;
335			struct odirect *odp;
336			struct odirect *eodp;
337			struct direct *dp;
338			size_t loc, i;
339
340			if (cvtflag) {
341			eodp = (struct odirect *)&buf[size];
342			for (odp = (struct odirect *)buf; odp < eodp; odp++)
343			if (odp->d_ino != 0) {
344			dcvt(odp, &cvtbuf);
345			putent(&cvtbuf);
346			}
347			} else {
348			for (loc = 0; loc < size; ) {
349			dp = (struct direct *)(buf + loc);
350			if (Bcvt) {
351			dp->d_ino = swap32(dp->d_ino);
352			dp->d_reclen = swap16(dp->d_reclen);
353			}
354			if (oldinofmt && dp->d_ino != 0) {
355			# if BYTE_ORDER == BIG_ENDIAN
356			if (Bcvt)
357			dp->d_namlen = dp->d_type;
358			# else
359			if (!Bcvt)
360			dp->d_namlen = dp->d_type;
361			# endif
362			dp->d_type = DT_UNKNOWN;
363			}
364			i = DIRBLKSIZ - (loc & (DIRBLKSIZ - 1));
365			if ((dp->d_reclen & 0x3) != 0 \|\|
366			dp->d_reclen > i \|\|
367			dp->d_reclen < DIRSIZ(0, dp) \|\|
368			dp->d_namlen > NAME_MAX) {
369			Vprintf(stdout, "Mangled directory: ");
370			if ((dp->d_reclen & 0x3) != 0)
371			Vprintf(stdout,
372			"reclen not multiple of 4 ");
373			if (dp->d_reclen < DIRSIZ(0, dp))
374			Vprintf(stdout,
375			"reclen less than DIRSIZ (%u < %u) ",
376			(unsigned)dp->d_reclen,
377			(unsigned)DIRSIZ(0, dp));
378			if (dp->d_namlen > NAME_MAX)
379			Vprintf(stdout,
380			"reclen name too big (%u > %u) ",
381			(unsigned)dp->d_namlen, NAME_MAX);
382			Vprintf(stdout, "\n");
383			loc += i;
384			continue;
385			}
386			loc += dp->d_reclen;
387			if (dp->d_ino != 0) {
388			putent(dp);
389			}
390			}
391			}
392			}
393
394			/*
395			* These variables are "local" to the following two functions.
396			*/
397			char dirbuf[DIRBLKSIZ];
398			long dirloc = 0;
399			long prev = 0;
400
401			/*
402			* add a new directory entry to a file.
403			*/
404			static void
405			putent(struct direct *dp)
406			{
407			dp->d_reclen = DIRSIZ(0, dp);
408			if (dirloc + dp->d_reclen > DIRBLKSIZ) {
409			((struct direct *)(dirbuf + prev))->d_reclen =
410			DIRBLKSIZ - prev;
411			(void)fwrite(dirbuf, 1, DIRBLKSIZ, df);
412			dirloc = 0;
413			}
414			memcpy(dirbuf + dirloc, dp, dp->d_reclen);
415			prev = dirloc;
416			dirloc += dp->d_reclen;
417			}
418
419			/*
420			* flush out a directory that is finished.
421			*/
422			static void
423			flushent(void)
424			{
425			((struct direct *)(dirbuf + prev))->d_reclen = DIRBLKSIZ - prev;
426			(void)fwrite(dirbuf, dirloc, 1, df);
427			seekpt = ftell(df);
428			dirloc = 0;
429			}
430
431			static void
432			dcvt(struct odirect odp, struct direct ndp)
433			{
434
435			memset(ndp, 0, sizeof *ndp);
436			if (Bcvt)
437			ndp->d_ino = swap16(odp->d_ino);
438			else
439			ndp->d_ino = odp->d_ino;
440			ndp->d_type = DT_UNKNOWN;
441			(void)strncpy(ndp->d_name, odp->d_name, ODIRSIZ);
442			ndp->d_namlen = strlen(ndp->d_name);
443			ndp->d_reclen = DIRSIZ(0, ndp);
444			}
445
446			/*
447			* Seek to an entry in a directory.
448			* Only values returned by rst_telldir should be passed to rst_seekdir.
449			* This routine handles many directories in a single file.
450			* It takes the base of the directory in the file, plus
451			* the desired seek offset into it.
452			*/
453			static void
454			rst_seekdir(RST_DIR *dirp, long loc, long base)
455			{
456
457			if (loc == rst_telldir(dirp))
458			return;
459			loc -= base;
460			if (loc < 0)
461			fprintf(stderr, "bad seek pointer to rst_seekdir %ld\n", loc);
462			(void)lseek(dirp->dd_fd, base + (loc & ~(DIRBLKSIZ - 1)), SEEK_SET);
463			dirp->dd_loc = loc & (DIRBLKSIZ - 1);
464			if (dirp->dd_loc != 0)
465			dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ);
466			}
467
468			/*
469			* get next entry in a directory.
470			*/
471			struct direct *
472			rst_readdir(RST_DIR *dirp)
473			{
474			struct direct *dp;
475
476			for (;;) {
477			if (dirp->dd_loc == 0) {
478			dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf,
479			DIRBLKSIZ);
480			if (dirp->dd_size <= 0) {
481			Dprintf(stderr, "error reading directory\n");
482			return (NULL);
483			}
484			}
485			if (dirp->dd_loc >= dirp->dd_size) {
486			dirp->dd_loc = 0;
487			continue;
488			}
489			dp = (struct direct *)(dirp->dd_buf + dirp->dd_loc);
490			if (dp->d_reclen == 0 \|\|
491			dp->d_reclen > DIRBLKSIZ + 1 - dirp->dd_loc) {
492			Dprintf(stderr, "corrupted directory: bad reclen %d\n",
493			dp->d_reclen);
494			return (NULL);
495			}
496			dirp->dd_loc += dp->d_reclen;
497			if (dp->d_ino == 0 && strcmp(dp->d_name, "/") == 0)
498			return (NULL);
499			if (dp->d_ino >= maxino) {
500			Dprintf(stderr, "corrupted directory: bad inum %llu\n",
501			(unsigned long long)dp->d_ino);
502			continue;
503			}
504			return (dp);
505			}
506			}
507
508			/*
509			* Simulate the opening of a directory
510			*/
511			RST_DIR *
512			rst_opendir(const char *name)
513			{
514			struct inotab *itp;
515			RST_DIR *dirp;
516			ino_t ino;
517
518			if ((ino = dirlookup(name)) > 0 &&
519			(itp = inotablookup(ino)) != NULL) {
520			dirp = opendirfile(dirfile);
521			rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
522			return (dirp);
523			}
524			return (NULL);
525			}
526
527			/*
528			* In our case, there is nothing to do when closing a directory.
529			*/
530			void
531			rst_closedir(RST_DIR *dirp)
532			{
533			(void)close(dirp->dd_fd);
534			free(dirp);
535			return;
536			}
537
538			/*
539			* Simulate finding the current offset in the directory.
540			*/
541			static long
542			rst_telldir(RST_DIR *dirp)
543			{
544			return ((long)lseek(dirp->dd_fd,
545			(off_t)0, SEEK_CUR) - dirp->dd_size + dirp->dd_loc);
546			}
547
548			/*
549			* Open a directory file.
550			*/
551			static RST_DIR *
552			opendirfile(const char *name)
553			{
554			RST_DIR *dirp;
555			int fd;
556
557			if ((fd = open(name, O_RDONLY)) == -1)
558			return (NULL);
559			if ((dirp = malloc(sizeof(RST_DIR))) == NULL) {
560			(void)close(fd);
561			return (NULL);
562			}
563			dirp->dd_fd = fd;
564			dirp->dd_loc = 0;
565			return (dirp);
566			}
567
568			/*
569			* Set the mode, owner, and times for all new or changed directories
570			*/
571			void
572			setdirmodes(int flags)
573			{
574			FILE *mf;
575			struct modeinfo node;
576			struct entry *ep;
577			char *cp;
578
579			Vprintf(stdout, "Set directory mode, owner, and times.\n");
580			if (command == 'r' \|\| command == 'R')
581			(void)snprintf(modefile, sizeof(modefile), "%s/rstmode%lld",
582			tmpdir, (long long)dumpdate);
583			if (modefile[0] == '#') {
584			panic("modefile not defined\n");
585			fputs("directory mode, owner, and times not set\n", stderr);
586			return;
587			}
588			mf = fopen(modefile, "r");
589			if (mf == NULL) {
590			warn("fopen");
591			fprintf(stderr, "cannot open mode file %s\n", modefile);
592			fprintf(stderr, "directory mode, owner, and times not set\n");
593			return;
594			}
595			clearerr(mf);
596			for (;;) {
597			(void)fread((char *)&node, 1, sizeof(struct modeinfo), mf);
598			if (feof(mf))
599			break;
600			ep = lookupino(node.ino);
601			if (command == 'i' \|\| command == 'x') {
602			if (ep == NULL)
603			continue;
604			if ((flags & FORCE) == 0 && ep->e_flags & EXISTED) {
605			ep->e_flags &= ~NEW;
606			continue;
607			}
608			if (node.ino == ROOTINO &&
609			reply("set owner/mode for '.'") == FAIL)
610			continue;
611			}
612			if (ep == NULL) {
613			panic("cannot find directory inode %llu\n",
614			(unsigned long long)node.ino);
615			} else {
616			if (!Nflag) {
617			cp = myname(ep);
618			(void)chown(cp, node.uid, node.gid);
619			(void)chmod(cp, node.mode);
620			(void)chflags(cp, node.flags);
621			(void)utimensat(AT_FDCWD, cp, node.ctimep, 0);
622			(void)utimensat(AT_FDCWD, cp, node.mtimep, 0);
623			}
624			ep->e_flags &= ~NEW;
625			}
626			}
627			if (ferror(mf))
628			panic("error setting directory modes\n");
629			(void)fclose(mf);
630			}
631
632			/*
633			* Generate a literal copy of a directory.
634			*/
635			int
636			genliteraldir(char *name, ino_t ino)
637			{
638			struct inotab *itp;
639			int ofile, dp, i, size;
640			char buf[BUFSIZ];
641
642			itp = inotablookup(ino);
643			if (itp == NULL)
644			panic("Cannot find directory inode %llu named %s\n",
645			(unsigned long long)ino, name);
646			if ((ofile = open(name, O_WRONLY \| O_CREAT \| O_TRUNC, 0666)) < 0) {
647			warn("%s: cannot create file", name);
648			return (FAIL);
649			}
650			rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
651			dp = dup(dirp->dd_fd);
652			for (i = itp->t_size; i > 0; i -= BUFSIZ) {
653			size = i < BUFSIZ ? i : BUFSIZ;
654			if (read(dp, buf, size) == -1)
655			err(1, "read error extracting inode %llu, name %s",
656			(unsigned long long)curfile.ino, curfile.name);
657			xtrfile(buf, size);
658			}
659			(void)close(dp);
660			(void)close(ofile);
661			return (GOOD);
662			}
663
664			/*
665			* Determine the type of an inode
666			*/
667			int
668			inodetype(ino_t ino)
669			{
670			struct inotab *itp;
671
672			itp = inotablookup(ino);
673			if (itp == NULL)
674			return (LEAF);
675			return (NODE);
676			}
677
678			/*
679			* Allocate and initialize a directory inode entry.
680			* If requested, save its pertinent mode, owner, and time info.
681			*/
682			static struct inotab *
683			allocinotab(FILE mf, struct context ctxp, long seekpt)
684			{
685			struct inotab *itp;
686			struct modeinfo node;
687
688			itp = calloc(1, sizeof(struct inotab));
689			if (itp == NULL)
690			panic("no memory directory table\n");
691			itp->t_next = inotab[INOHASH(ctxp->ino)];
692			inotab[INOHASH(ctxp->ino)] = itp;
693			itp->t_ino = ctxp->ino;
694			itp->t_seekpt = seekpt;
695			if (mf == NULL)
696			return (itp);
697			node.ino = ctxp->ino;
698			node.mtimep[0].tv_sec = ctxp->atime_sec;
699			node.mtimep[0].tv_nsec = ctxp->atime_nsec;
700			node.mtimep[1].tv_sec = ctxp->mtime_sec;
701			node.mtimep[1].tv_nsec = ctxp->mtime_nsec;
702			node.ctimep[0].tv_sec = ctxp->atime_sec;
703			node.ctimep[0].tv_nsec = ctxp->atime_nsec;
704			node.ctimep[1].tv_sec = ctxp->birthtime_sec;
705			node.ctimep[1].tv_nsec = ctxp->birthtime_nsec;
706			node.mode = ctxp->mode;
707			node.flags = ctxp->file_flags;
708			node.uid = ctxp->uid;
709			node.gid = ctxp->gid;
710			(void)fwrite((char *)&node, 1, sizeof(struct modeinfo), mf);
711			return (itp);
712			}
713
714			/*
715			* Look up an inode in the table of directories
716			*/
717			static struct inotab *
718			inotablookup(ino_t ino)
719			{
720			struct inotab *itp;
721
722			for (itp = inotab[INOHASH(ino)]; itp != NULL; itp = itp->t_next)
723			if (itp->t_ino == ino)
724			return (itp);
725			return (NULL);
726			}
727
728			/*
729			* Clean up and exit
730			*/
731			void
732			cleanup(void)
733			{
734
735			closemt();
736			if (modefile[0] != '#')
737			(void)unlink(modefile);
738			if (dirfile[0] != '#')
739			(void)unlink(dirfile);
740			}