426 lines
9.1 KiB
C
426 lines
9.1 KiB
C
/* $NetBSD: utilities.c,v 1.17 2003/08/07 10:04:38 agc Exp $ */
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/*
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* Copyright (c) 1983, 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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#if 0
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static char sccsid[] = "@(#)utilities.c 8.5 (Berkeley) 4/28/95";
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#else
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__RCSID("$NetBSD: utilities.c,v 1.17 2003/08/07 10:04:38 agc Exp $");
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#endif
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <ufs/ufs/dinode.h>
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#include <ufs/ufs/dir.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "restore.h"
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#include "extern.h"
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/*
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* Insure that all the components of a pathname exist.
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*/
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void
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pathcheck(name)
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char *name;
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{
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char *cp;
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struct entry *ep;
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char *start;
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start = strchr(name, '/');
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if (start == 0)
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return;
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for (cp = start; *cp != '\0'; cp++) {
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if (*cp != '/')
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continue;
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*cp = '\0';
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ep = lookupname(name);
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if (ep == NULL) {
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/* Safe; we know the pathname exists in the dump. */
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ep = addentry(name, pathsearch(name)->d_ino, NODE);
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newnode(ep);
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}
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ep->e_flags |= NEW|KEEP;
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*cp = '/';
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}
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}
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/*
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* Change a name to a unique temporary name.
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*/
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void
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mktempname(ep)
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struct entry *ep;
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{
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char oldname[MAXPATHLEN];
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if (ep->e_flags & TMPNAME)
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badentry(ep, "mktempname: called with TMPNAME");
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ep->e_flags |= TMPNAME;
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(void) strcpy(oldname, myname(ep));
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freename(ep->e_name);
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ep->e_name = savename(gentempname(ep));
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ep->e_namlen = strlen(ep->e_name);
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renameit(oldname, myname(ep));
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}
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/*
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* Generate a temporary name for an entry.
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*/
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char *
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gentempname(ep)
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struct entry *ep;
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{
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static char name[MAXPATHLEN];
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struct entry *np;
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long i = 0;
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for (np = lookupino(ep->e_ino);
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np != NULL && np != ep; np = np->e_links)
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i++;
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if (np == NULL)
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badentry(ep, "not on ino list");
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(void) snprintf(name, sizeof(name), "%s%ld%d", TMPHDR, (long) i,
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ep->e_ino);
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return (name);
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}
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/*
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* Rename a file or directory.
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*/
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void
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renameit(from, to)
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char *from, *to;
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{
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if (!Nflag && rename(from, to) < 0) {
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fprintf(stderr, "warning: cannot rename %s to %s: %s\n",
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from, to, strerror(errno));
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return;
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}
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vprintf(stdout, "rename %s to %s\n", from, to);
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}
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/*
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* Create a new node (directory).
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*/
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void
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newnode(np)
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struct entry *np;
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{
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char *cp;
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if (np->e_type != NODE)
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badentry(np, "newnode: not a node");
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cp = myname(np);
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if (!Nflag && mkdir(cp, 0777) < 0) {
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np->e_flags |= EXISTED;
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fprintf(stderr, "warning: %s: %s\n", cp, strerror(errno));
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return;
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}
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vprintf(stdout, "Make node %s\n", cp);
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}
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/*
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* Remove an old node (directory).
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*/
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void
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removenode(ep)
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struct entry *ep;
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{
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char *cp;
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if (ep->e_type != NODE)
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badentry(ep, "removenode: not a node");
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if (ep->e_entries != NULL)
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badentry(ep, "removenode: non-empty directory");
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ep->e_flags |= REMOVED;
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ep->e_flags &= ~TMPNAME;
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cp = myname(ep);
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if (!Nflag && rmdir(cp) < 0) {
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fprintf(stderr, "warning: %s: %s\n", cp, strerror(errno));
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return;
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}
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vprintf(stdout, "Remove node %s\n", cp);
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}
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/*
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* Remove a leaf.
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*/
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void
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removeleaf(ep)
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struct entry *ep;
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{
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char *cp;
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if (ep->e_type != LEAF)
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badentry(ep, "removeleaf: not a leaf");
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ep->e_flags |= REMOVED;
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ep->e_flags &= ~TMPNAME;
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cp = myname(ep);
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if (!Nflag && unlink(cp) < 0) {
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fprintf(stderr, "warning: %s: %s\n", cp, strerror(errno));
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return;
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}
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vprintf(stdout, "Remove leaf %s\n", cp);
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}
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/*
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* Create a link.
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*/
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int
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linkit(existing, new, type)
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char *existing, *new;
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int type;
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{
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if (type == SYMLINK) {
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if (!Nflag && symlink(existing, new) < 0) {
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fprintf(stderr,
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"warning: cannot create symbolic link %s->%s: %s\n",
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new, existing, strerror(errno));
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return (FAIL);
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}
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} else if (type == HARDLINK) {
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if (!Nflag && link(existing, new) < 0) {
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fprintf(stderr,
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"warning: cannot create hard link %s->%s: %s\n",
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new, existing, strerror(errno));
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return (FAIL);
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}
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} else {
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panic("linkit: unknown type %d\n", type);
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return (FAIL);
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}
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vprintf(stdout, "Create %s link %s->%s\n",
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type == SYMLINK ? "symbolic" : "hard", new, existing);
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return (GOOD);
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}
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/*
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* Create a whiteout.
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*/
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int
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addwhiteout(name)
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char *name;
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{
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if (!Nflag && mknod(name, S_IFWHT, 0) < 0) {
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fprintf(stderr, "warning: cannot create whiteout %s: %s\n",
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name, strerror(errno));
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return (FAIL);
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}
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vprintf(stdout, "Create whiteout %s\n", name);
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return (GOOD);
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}
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/*
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* Delete a whiteout.
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*/
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void
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delwhiteout(ep)
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struct entry *ep;
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{
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char *name;
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if (ep->e_type != LEAF)
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badentry(ep, "delwhiteout: not a leaf");
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ep->e_flags |= REMOVED;
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ep->e_flags &= ~TMPNAME;
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name = myname(ep);
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if (!Nflag && undelete(name) < 0) {
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fprintf(stderr, "warning: cannot delete whiteout %s: %s\n",
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name, strerror(errno));
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return;
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}
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vprintf(stdout, "Delete whiteout %s\n", name);
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}
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/*
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* find lowest number file (above "start") that needs to be extracted
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*/
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ino_t
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lowerbnd(start)
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ino_t start;
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{
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struct entry *ep;
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for ( ; start < maxino; start++) {
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ep = lookupino(start);
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if (ep == NULL || ep->e_type == NODE)
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continue;
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if (ep->e_flags & (NEW|EXTRACT))
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return (start);
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}
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return (start);
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}
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/*
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* find highest number file (below "start") that needs to be extracted
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*/
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ino_t
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upperbnd(start)
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ino_t start;
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{
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struct entry *ep;
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for ( ; start > ROOTINO; start--) {
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ep = lookupino(start);
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if (ep == NULL || ep->e_type == NODE)
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continue;
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if (ep->e_flags & (NEW|EXTRACT))
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return (start);
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}
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return (start);
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}
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/*
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* report on a badly formed entry
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*/
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void
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badentry(ep, message)
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struct entry *ep;
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char *message;
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{
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fprintf(stderr, "bad entry: %s\n", message);
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fprintf(stderr, "name: %s\n", myname(ep));
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fprintf(stderr, "parent name %s\n", myname(ep->e_parent));
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if (ep->e_sibling != NULL)
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fprintf(stderr, "sibling name: %s\n", myname(ep->e_sibling));
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if (ep->e_entries != NULL)
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fprintf(stderr, "next entry name: %s\n", myname(ep->e_entries));
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if (ep->e_links != NULL)
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fprintf(stderr, "next link name: %s\n", myname(ep->e_links));
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if (ep->e_next != NULL)
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fprintf(stderr,
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"next hashchain name: %s\n", myname(ep->e_next));
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fprintf(stderr, "entry type: %s\n",
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ep->e_type == NODE ? "NODE" : "LEAF");
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fprintf(stderr, "inode number: %ld\n", (long)ep->e_ino);
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panic("flags: %s\n", flagvalues(ep));
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}
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/*
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* Construct a string indicating the active flag bits of an entry.
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*/
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char *
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flagvalues(ep)
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struct entry *ep;
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{
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static char flagbuf[BUFSIZ];
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(void) strcpy(flagbuf, "|NIL");
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flagbuf[0] = '\0';
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if (ep->e_flags & REMOVED)
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(void) strcat(flagbuf, "|REMOVED");
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if (ep->e_flags & TMPNAME)
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(void) strcat(flagbuf, "|TMPNAME");
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if (ep->e_flags & EXTRACT)
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(void) strcat(flagbuf, "|EXTRACT");
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if (ep->e_flags & NEW)
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(void) strcat(flagbuf, "|NEW");
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if (ep->e_flags & KEEP)
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(void) strcat(flagbuf, "|KEEP");
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if (ep->e_flags & EXISTED)
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(void) strcat(flagbuf, "|EXISTED");
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return (&flagbuf[1]);
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}
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/*
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* Check to see if a name is on a dump tape.
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*/
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ino_t
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dirlookup(name)
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const char *name;
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{
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struct direct *dp;
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ino_t ino;
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ino = ((dp = pathsearch(name)) == NULL) ? 0 : dp->d_ino;
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if (ino == 0 || TSTINO(ino, dumpmap) == 0)
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fprintf(stderr, "%s is not on the tape\n", name);
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return (ino);
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}
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/*
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* Elicit a reply.
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*/
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int
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reply(question)
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char *question;
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{
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char c;
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do {
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fprintf(stderr, "%s? [yn] ", question);
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(void) fflush(stderr);
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c = getc(terminal);
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while (c != '\n' && getc(terminal) != '\n')
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if (feof(terminal))
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return (FAIL);
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} while (c != 'y' && c != 'n');
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if (c == 'y')
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return (GOOD);
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return (FAIL);
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}
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/*
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* handle unexpected inconsistencies
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*/
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#include <stdarg.h>
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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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vfprintf(stderr, fmt, ap);
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va_end(ap);
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if (yflag)
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return;
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if (reply("abort") == GOOD) {
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if (reply("dump core") == GOOD)
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abort();
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exit(1);
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}
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}
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