1121 lines
28 KiB
C
1121 lines
28 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1992 Keith Muller.
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Keith Muller of the University of California, San Diego.
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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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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)cpio.c 8.1 (Berkeley) 5/31/93";
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#endif
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#endif /* not lint */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <sys/time.h>
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#include <sys/stat.h>
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#include <string.h>
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#include <stdint.h>
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#include <stdio.h>
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#include "pax.h"
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#include "cpio.h"
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#include "extern.h"
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static int rd_nm(ARCHD *, int);
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static int rd_ln_nm(ARCHD *);
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static int com_rd(ARCHD *);
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/*
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* Routines which support the different cpio versions
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*/
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static int swp_head; /* binary cpio header byte swap */
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/*
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* Routines common to all versions of cpio
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*/
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/*
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* cpio_strd()
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* Fire up the hard link detection code
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* Return:
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* 0 if ok -1 otherwise (the return values of lnk_start())
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*/
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int
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cpio_strd(void)
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{
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return(lnk_start());
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}
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/*
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* cpio_trail()
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* Called to determine if a header block is a valid trailer. We are
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* passed the block, the in_sync flag (which tells us we are in resync
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* mode; looking for a valid header), and cnt (which starts at zero)
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* which is used to count the number of empty blocks we have seen so far.
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* Return:
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* 0 if a valid trailer, -1 if not a valid trailer,
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*/
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int
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cpio_trail(ARCHD *arcn)
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{
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/*
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* look for trailer id in file we are about to process
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*/
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if ((strcmp(arcn->name, TRAILER) == 0) && (arcn->sb.st_size == 0))
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return(0);
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return(-1);
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}
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/*
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* com_rd()
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* operations common to all cpio read functions.
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* Return:
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* 0
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*/
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static int
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com_rd(ARCHD *arcn)
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{
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arcn->skip = 0;
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arcn->pat = NULL;
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arcn->org_name = arcn->name;
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switch(arcn->sb.st_mode & C_IFMT) {
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case C_ISFIFO:
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arcn->type = PAX_FIF;
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break;
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case C_ISDIR:
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arcn->type = PAX_DIR;
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break;
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case C_ISBLK:
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arcn->type = PAX_BLK;
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break;
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case C_ISCHR:
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arcn->type = PAX_CHR;
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break;
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case C_ISLNK:
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arcn->type = PAX_SLK;
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break;
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case C_ISOCK:
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arcn->type = PAX_SCK;
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break;
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case C_ISCTG:
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case C_ISREG:
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default:
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/*
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* we have file data, set up skip (pad is set in the format
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* specific sections)
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*/
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arcn->sb.st_mode = (arcn->sb.st_mode & 0xfff) | C_ISREG;
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arcn->type = PAX_REG;
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arcn->skip = arcn->sb.st_size;
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break;
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}
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if (chk_lnk(arcn) < 0)
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return(-1);
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return(0);
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}
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/*
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* cpio_endwr()
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* write the special file with the name trailer in the proper format
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* Return:
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* result of the write of the trailer from the cpio specific write func
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*/
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int
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cpio_endwr(void)
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{
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ARCHD last;
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/*
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* create a trailer request and call the proper format write function
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*/
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memset(&last, 0, sizeof(last));
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last.nlen = sizeof(TRAILER) - 1;
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last.type = PAX_REG;
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last.sb.st_nlink = 1;
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(void)strcpy(last.name, TRAILER);
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return((*frmt->wr)(&last));
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}
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/*
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* rd_nam()
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* read in the file name which follows the cpio header
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* Return:
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* 0 if ok, -1 otherwise
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*/
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static int
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rd_nm(ARCHD *arcn, int nsz)
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{
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/*
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* do not even try bogus values
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*/
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if ((nsz == 0) || (nsz > (int)sizeof(arcn->name))) {
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paxwarn(1, "Cpio file name length %d is out of range", nsz);
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return(-1);
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}
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/*
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* read the name and make sure it is not empty and is \0 terminated
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*/
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if ((rd_wrbuf(arcn->name,nsz) != nsz) || (arcn->name[nsz-1] != '\0') ||
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(arcn->name[0] == '\0')) {
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paxwarn(1, "Cpio file name in header is corrupted");
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return(-1);
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}
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return(0);
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}
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/*
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* rd_ln_nm()
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* read in the link name for a file with links. The link name is stored
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* like file data (and is NOT \0 terminated!)
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* Return:
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* 0 if ok, -1 otherwise
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*/
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static int
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rd_ln_nm(ARCHD *arcn)
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{
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/*
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* check the length specified for bogus values
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*/
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if ((arcn->sb.st_size == 0) ||
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((size_t)arcn->sb.st_size >= sizeof(arcn->ln_name))) {
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paxwarn(1, "Cpio link name length is invalid: %ju",
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(uintmax_t)arcn->sb.st_size);
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return(-1);
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}
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/*
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* read in the link name and \0 terminate it
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*/
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if (rd_wrbuf(arcn->ln_name, (int)arcn->sb.st_size) !=
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(int)arcn->sb.st_size) {
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paxwarn(1, "Cpio link name read error");
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return(-1);
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}
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arcn->ln_nlen = arcn->sb.st_size;
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arcn->ln_name[arcn->ln_nlen] = '\0';
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/*
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* watch out for those empty link names
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*/
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if (arcn->ln_name[0] == '\0') {
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paxwarn(1, "Cpio link name is corrupt");
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return(-1);
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}
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return(0);
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}
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/*
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* Routines common to the extended byte oriented cpio format
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*/
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/*
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* cpio_id()
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* determine if a block given to us is a valid extended byte oriented
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* cpio header
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* Return:
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* 0 if a valid header, -1 otherwise
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*/
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int
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cpio_id(char *blk, int size)
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{
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if ((size < (int)sizeof(HD_CPIO)) ||
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(strncmp(blk, AMAGIC, sizeof(AMAGIC) - 1) != 0))
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return(-1);
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return(0);
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}
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/*
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* cpio_rd()
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* determine if a buffer is a byte oriented extended cpio archive entry.
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* convert and store the values in the ARCHD parameter.
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* Return:
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* 0 if a valid header, -1 otherwise.
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*/
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int
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cpio_rd(ARCHD *arcn, char *buf)
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{
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int nsz;
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HD_CPIO *hd;
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/*
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* check that this is a valid header, if not return -1
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*/
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if (cpio_id(buf, sizeof(HD_CPIO)) < 0)
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return(-1);
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hd = (HD_CPIO *)buf;
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/*
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* byte oriented cpio (posix) does not have padding! extract the octal
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* ascii fields from the header
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*/
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arcn->pad = 0L;
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arcn->sb.st_dev = (dev_t)asc_ul(hd->c_dev, sizeof(hd->c_dev), OCT);
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arcn->sb.st_ino = (ino_t)asc_ul(hd->c_ino, sizeof(hd->c_ino), OCT);
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arcn->sb.st_mode = (mode_t)asc_ul(hd->c_mode, sizeof(hd->c_mode), OCT);
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arcn->sb.st_uid = (uid_t)asc_ul(hd->c_uid, sizeof(hd->c_uid), OCT);
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arcn->sb.st_gid = (gid_t)asc_ul(hd->c_gid, sizeof(hd->c_gid), OCT);
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arcn->sb.st_nlink = (nlink_t)asc_ul(hd->c_nlink, sizeof(hd->c_nlink),
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OCT);
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arcn->sb.st_rdev = (dev_t)asc_ul(hd->c_rdev, sizeof(hd->c_rdev), OCT);
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arcn->sb.st_mtime = (time_t)asc_uqd(hd->c_mtime, sizeof(hd->c_mtime),
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OCT);
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arcn->sb.st_ctime = arcn->sb.st_atime = arcn->sb.st_mtime;
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arcn->sb.st_size = (off_t)asc_uqd(hd->c_filesize,sizeof(hd->c_filesize),
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OCT);
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/*
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* check name size and if valid, read in the name of this entry (name
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* follows header in the archive)
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*/
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if ((nsz = (int)asc_ul(hd->c_namesize,sizeof(hd->c_namesize),OCT)) < 2)
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return(-1);
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arcn->nlen = nsz - 1;
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if (rd_nm(arcn, nsz) < 0)
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return(-1);
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if (((arcn->sb.st_mode&C_IFMT) != C_ISLNK)||(arcn->sb.st_size == 0)) {
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/*
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* no link name to read for this file
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*/
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arcn->ln_nlen = 0;
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arcn->ln_name[0] = '\0';
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return(com_rd(arcn));
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}
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/*
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* check link name size and read in the link name. Link names are
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* stored like file data.
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*/
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if (rd_ln_nm(arcn) < 0)
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return(-1);
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/*
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* we have a valid header (with a link)
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*/
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return(com_rd(arcn));
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}
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/*
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* cpio_endrd()
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* no cleanup needed here, just return size of the trailer (for append)
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* Return:
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* size of trailer header in this format
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*/
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off_t
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cpio_endrd(void)
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{
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return((off_t)(sizeof(HD_CPIO) + sizeof(TRAILER)));
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}
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/*
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* cpio_stwr()
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* start up the device mapping table
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* Return:
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* 0 if ok, -1 otherwise (what dev_start() returns)
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*/
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int
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cpio_stwr(void)
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{
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return(dev_start());
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}
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/*
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* cpio_wr()
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* copy the data in the ARCHD to buffer in extended byte oriented cpio
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* format.
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* Return
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* 0 if file has data to be written after the header, 1 if file has NO
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* data to write after the header, -1 if archive write failed
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*/
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int
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cpio_wr(ARCHD *arcn)
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{
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HD_CPIO *hd;
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int nsz;
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HD_CPIO hdblk;
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/*
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* check and repair truncated device and inode fields in the header
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*/
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if (map_dev(arcn, (u_long)CPIO_MASK, (u_long)CPIO_MASK) < 0)
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return(-1);
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arcn->pad = 0L;
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nsz = arcn->nlen + 1;
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hd = &hdblk;
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if ((arcn->type != PAX_BLK) && (arcn->type != PAX_CHR))
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arcn->sb.st_rdev = 0;
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switch(arcn->type) {
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case PAX_CTG:
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case PAX_REG:
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case PAX_HRG:
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/*
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* set data size for file data
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*/
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if (uqd_asc((u_quad_t)arcn->sb.st_size, hd->c_filesize,
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sizeof(hd->c_filesize), OCT)) {
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paxwarn(1,"File is too large for cpio format %s",
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arcn->org_name);
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return(1);
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}
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break;
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case PAX_SLK:
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/*
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* set data size to hold link name
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*/
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if (ul_asc((u_long)arcn->ln_nlen, hd->c_filesize,
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sizeof(hd->c_filesize), OCT))
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goto out;
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break;
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default:
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/*
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* all other file types have no file data
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*/
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if (ul_asc((u_long)0, hd->c_filesize, sizeof(hd->c_filesize),
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OCT))
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goto out;
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break;
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}
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/*
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* copy the values to the header using octal ascii
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*/
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if (ul_asc((u_long)MAGIC, hd->c_magic, sizeof(hd->c_magic), OCT) ||
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ul_asc((u_long)arcn->sb.st_dev, hd->c_dev, sizeof(hd->c_dev),
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OCT) ||
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ul_asc((u_long)arcn->sb.st_ino, hd->c_ino, sizeof(hd->c_ino),
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OCT) ||
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ul_asc((u_long)arcn->sb.st_mode, hd->c_mode, sizeof(hd->c_mode),
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OCT) ||
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ul_asc((u_long)arcn->sb.st_uid, hd->c_uid, sizeof(hd->c_uid),
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OCT) ||
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ul_asc((u_long)arcn->sb.st_gid, hd->c_gid, sizeof(hd->c_gid),
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OCT) ||
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ul_asc((u_long)arcn->sb.st_nlink, hd->c_nlink, sizeof(hd->c_nlink),
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OCT) ||
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ul_asc((u_long)arcn->sb.st_rdev, hd->c_rdev, sizeof(hd->c_rdev),
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OCT) ||
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ul_asc((u_long)arcn->sb.st_mtime,hd->c_mtime,sizeof(hd->c_mtime),
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OCT) ||
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ul_asc((u_long)nsz, hd->c_namesize, sizeof(hd->c_namesize), OCT))
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goto out;
|
|
|
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/*
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* write the file name to the archive
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*/
|
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if ((wr_rdbuf((char *)&hdblk, (int)sizeof(HD_CPIO)) < 0) ||
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(wr_rdbuf(arcn->name, nsz) < 0)) {
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paxwarn(1, "Unable to write cpio header for %s", arcn->org_name);
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return(-1);
|
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}
|
|
|
|
/*
|
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* if this file has data, we are done. The caller will write the file
|
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* data, if we are link tell caller we are done, go to next file
|
|
*/
|
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if ((arcn->type == PAX_CTG) || (arcn->type == PAX_REG) ||
|
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(arcn->type == PAX_HRG))
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return(0);
|
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if (arcn->type != PAX_SLK)
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return(1);
|
|
|
|
/*
|
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* write the link name to the archive, tell the caller to go to the
|
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* next file as we are done.
|
|
*/
|
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if (wr_rdbuf(arcn->ln_name, arcn->ln_nlen) < 0) {
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paxwarn(1,"Unable to write cpio link name for %s",arcn->org_name);
|
|
return(-1);
|
|
}
|
|
return(1);
|
|
|
|
out:
|
|
/*
|
|
* header field is out of range
|
|
*/
|
|
paxwarn(1, "Cpio header field is too small to store file %s",
|
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arcn->org_name);
|
|
return(1);
|
|
}
|
|
|
|
/*
|
|
* Routines common to the system VR4 version of cpio (with/without file CRC)
|
|
*/
|
|
|
|
/*
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|
* vcpio_id()
|
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* determine if a block given to us is a valid system VR4 cpio header
|
|
* WITHOUT crc. WATCH it the magic cookies are in OCTAL, the header
|
|
* uses HEX
|
|
* Return:
|
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* 0 if a valid header, -1 otherwise
|
|
*/
|
|
|
|
int
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vcpio_id(char *blk, int size)
|
|
{
|
|
if ((size < (int)sizeof(HD_VCPIO)) ||
|
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(strncmp(blk, AVMAGIC, sizeof(AVMAGIC) - 1) != 0))
|
|
return(-1);
|
|
return(0);
|
|
}
|
|
|
|
/*
|
|
* crc_id()
|
|
* determine if a block given to us is a valid system VR4 cpio header
|
|
* WITH crc. WATCH it the magic cookies are in OCTAL the header uses HEX
|
|
* Return:
|
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* 0 if a valid header, -1 otherwise
|
|
*/
|
|
|
|
int
|
|
crc_id(char *blk, int size)
|
|
{
|
|
if ((size < (int)sizeof(HD_VCPIO)) ||
|
|
(strncmp(blk, AVCMAGIC, (int)sizeof(AVCMAGIC) - 1) != 0))
|
|
return(-1);
|
|
return(0);
|
|
}
|
|
|
|
/*
|
|
* crc_strd()
|
|
w set file data CRC calculations. Fire up the hard link detection code
|
|
* Return:
|
|
* 0 if ok -1 otherwise (the return values of lnk_start())
|
|
*/
|
|
|
|
int
|
|
crc_strd(void)
|
|
{
|
|
docrc = 1;
|
|
return(lnk_start());
|
|
}
|
|
|
|
/*
|
|
* vcpio_rd()
|
|
* determine if a buffer is a system VR4 archive entry. (with/without CRC)
|
|
* convert and store the values in the ARCHD parameter.
|
|
* Return:
|
|
* 0 if a valid header, -1 otherwise.
|
|
*/
|
|
|
|
int
|
|
vcpio_rd(ARCHD *arcn, char *buf)
|
|
{
|
|
HD_VCPIO *hd;
|
|
dev_t devminor;
|
|
dev_t devmajor;
|
|
int nsz;
|
|
|
|
/*
|
|
* during the id phase it was determined if we were using CRC, use the
|
|
* proper id routine.
|
|
*/
|
|
if (docrc) {
|
|
if (crc_id(buf, sizeof(HD_VCPIO)) < 0)
|
|
return(-1);
|
|
} else {
|
|
if (vcpio_id(buf, sizeof(HD_VCPIO)) < 0)
|
|
return(-1);
|
|
}
|
|
|
|
hd = (HD_VCPIO *)buf;
|
|
arcn->pad = 0L;
|
|
|
|
/*
|
|
* extract the hex ascii fields from the header
|
|
*/
|
|
arcn->sb.st_ino = (ino_t)asc_ul(hd->c_ino, sizeof(hd->c_ino), HEX);
|
|
arcn->sb.st_mode = (mode_t)asc_ul(hd->c_mode, sizeof(hd->c_mode), HEX);
|
|
arcn->sb.st_uid = (uid_t)asc_ul(hd->c_uid, sizeof(hd->c_uid), HEX);
|
|
arcn->sb.st_gid = (gid_t)asc_ul(hd->c_gid, sizeof(hd->c_gid), HEX);
|
|
arcn->sb.st_mtime = (time_t)asc_uqd(hd->c_mtime,sizeof(hd->c_mtime),HEX);
|
|
arcn->sb.st_ctime = arcn->sb.st_atime = arcn->sb.st_mtime;
|
|
arcn->sb.st_size = (off_t)asc_uqd(hd->c_filesize,
|
|
sizeof(hd->c_filesize), HEX);
|
|
arcn->sb.st_nlink = (nlink_t)asc_ul(hd->c_nlink, sizeof(hd->c_nlink),
|
|
HEX);
|
|
devmajor = (dev_t)asc_ul(hd->c_maj, sizeof(hd->c_maj), HEX);
|
|
devminor = (dev_t)asc_ul(hd->c_min, sizeof(hd->c_min), HEX);
|
|
arcn->sb.st_dev = TODEV(devmajor, devminor);
|
|
devmajor = (dev_t)asc_ul(hd->c_rmaj, sizeof(hd->c_maj), HEX);
|
|
devminor = (dev_t)asc_ul(hd->c_rmin, sizeof(hd->c_min), HEX);
|
|
arcn->sb.st_rdev = TODEV(devmajor, devminor);
|
|
arcn->crc = asc_ul(hd->c_chksum, sizeof(hd->c_chksum), HEX);
|
|
|
|
/*
|
|
* check the length of the file name, if ok read it in, return -1 if
|
|
* bogus
|
|
*/
|
|
if ((nsz = (int)asc_ul(hd->c_namesize,sizeof(hd->c_namesize),HEX)) < 2)
|
|
return(-1);
|
|
arcn->nlen = nsz - 1;
|
|
if (rd_nm(arcn, nsz) < 0)
|
|
return(-1);
|
|
|
|
/*
|
|
* skip padding. header + filename is aligned to 4 byte boundaries
|
|
*/
|
|
if (rd_skip((off_t)(VCPIO_PAD(sizeof(HD_VCPIO) + nsz))) < 0)
|
|
return(-1);
|
|
|
|
/*
|
|
* if not a link (or a file with no data), calculate pad size (for
|
|
* padding which follows the file data), clear the link name and return
|
|
*/
|
|
if (((arcn->sb.st_mode&C_IFMT) != C_ISLNK)||(arcn->sb.st_size == 0)) {
|
|
/*
|
|
* we have a valid header (not a link)
|
|
*/
|
|
arcn->ln_nlen = 0;
|
|
arcn->ln_name[0] = '\0';
|
|
arcn->pad = VCPIO_PAD(arcn->sb.st_size);
|
|
return(com_rd(arcn));
|
|
}
|
|
|
|
/*
|
|
* read in the link name and skip over the padding
|
|
*/
|
|
if ((rd_ln_nm(arcn) < 0) ||
|
|
(rd_skip((off_t)(VCPIO_PAD(arcn->sb.st_size))) < 0))
|
|
return(-1);
|
|
|
|
/*
|
|
* we have a valid header (with a link)
|
|
*/
|
|
return(com_rd(arcn));
|
|
}
|
|
|
|
/*
|
|
* vcpio_endrd()
|
|
* no cleanup needed here, just return size of the trailer (for append)
|
|
* Return:
|
|
* size of trailer header in this format
|
|
*/
|
|
|
|
off_t
|
|
vcpio_endrd(void)
|
|
{
|
|
return((off_t)(sizeof(HD_VCPIO) + sizeof(TRAILER) +
|
|
(VCPIO_PAD(sizeof(HD_VCPIO) + sizeof(TRAILER)))));
|
|
}
|
|
|
|
/*
|
|
* crc_stwr()
|
|
* start up the device mapping table, enable crc file calculation
|
|
* Return:
|
|
* 0 if ok, -1 otherwise (what dev_start() returns)
|
|
*/
|
|
|
|
int
|
|
crc_stwr(void)
|
|
{
|
|
docrc = 1;
|
|
return(dev_start());
|
|
}
|
|
|
|
/*
|
|
* vcpio_wr()
|
|
* copy the data in the ARCHD to buffer in system VR4 cpio
|
|
* (with/without crc) format.
|
|
* Return
|
|
* 0 if file has data to be written after the header, 1 if file has
|
|
* NO data to write after the header, -1 if archive write failed
|
|
*/
|
|
|
|
int
|
|
vcpio_wr(ARCHD *arcn)
|
|
{
|
|
HD_VCPIO *hd;
|
|
unsigned int nsz;
|
|
HD_VCPIO hdblk;
|
|
|
|
/*
|
|
* check and repair truncated device and inode fields in the cpio
|
|
* header
|
|
*/
|
|
if (map_dev(arcn, (u_long)VCPIO_MASK, (u_long)VCPIO_MASK) < 0)
|
|
return(-1);
|
|
nsz = arcn->nlen + 1;
|
|
hd = &hdblk;
|
|
if ((arcn->type != PAX_BLK) && (arcn->type != PAX_CHR))
|
|
arcn->sb.st_rdev = 0;
|
|
|
|
/*
|
|
* add the proper magic value depending whether we were asked for
|
|
* file data crc's, and the crc if needed.
|
|
*/
|
|
if (docrc) {
|
|
if (ul_asc((u_long)VCMAGIC, hd->c_magic, sizeof(hd->c_magic),
|
|
OCT) ||
|
|
ul_asc((u_long)arcn->crc,hd->c_chksum,sizeof(hd->c_chksum),
|
|
HEX))
|
|
goto out;
|
|
} else {
|
|
if (ul_asc((u_long)VMAGIC, hd->c_magic, sizeof(hd->c_magic),
|
|
OCT) ||
|
|
ul_asc((u_long)0L, hd->c_chksum, sizeof(hd->c_chksum),HEX))
|
|
goto out;
|
|
}
|
|
|
|
switch(arcn->type) {
|
|
case PAX_CTG:
|
|
case PAX_REG:
|
|
case PAX_HRG:
|
|
/*
|
|
* caller will copy file data to the archive. tell him how
|
|
* much to pad.
|
|
*/
|
|
arcn->pad = VCPIO_PAD(arcn->sb.st_size);
|
|
if (uqd_asc((u_quad_t)arcn->sb.st_size, hd->c_filesize,
|
|
sizeof(hd->c_filesize), HEX)) {
|
|
paxwarn(1,"File is too large for sv4cpio format %s",
|
|
arcn->org_name);
|
|
return(1);
|
|
}
|
|
break;
|
|
case PAX_SLK:
|
|
/*
|
|
* no file data for the caller to process, the file data has
|
|
* the size of the link
|
|
*/
|
|
arcn->pad = 0L;
|
|
if (ul_asc((u_long)arcn->ln_nlen, hd->c_filesize,
|
|
sizeof(hd->c_filesize), HEX))
|
|
goto out;
|
|
break;
|
|
default:
|
|
/*
|
|
* no file data for the caller to process
|
|
*/
|
|
arcn->pad = 0L;
|
|
if (ul_asc((u_long)0L, hd->c_filesize, sizeof(hd->c_filesize),
|
|
HEX))
|
|
goto out;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* set the other fields in the header
|
|
*/
|
|
if (ul_asc((u_long)arcn->sb.st_ino, hd->c_ino, sizeof(hd->c_ino),
|
|
HEX) ||
|
|
ul_asc((u_long)arcn->sb.st_mode, hd->c_mode, sizeof(hd->c_mode),
|
|
HEX) ||
|
|
ul_asc((u_long)arcn->sb.st_uid, hd->c_uid, sizeof(hd->c_uid),
|
|
HEX) ||
|
|
ul_asc((u_long)arcn->sb.st_gid, hd->c_gid, sizeof(hd->c_gid),
|
|
HEX) ||
|
|
ul_asc((u_long)arcn->sb.st_mtime, hd->c_mtime, sizeof(hd->c_mtime),
|
|
HEX) ||
|
|
ul_asc((u_long)arcn->sb.st_nlink, hd->c_nlink, sizeof(hd->c_nlink),
|
|
HEX) ||
|
|
ul_asc((u_long)MAJOR(arcn->sb.st_dev),hd->c_maj, sizeof(hd->c_maj),
|
|
HEX) ||
|
|
ul_asc((u_long)MINOR(arcn->sb.st_dev),hd->c_min, sizeof(hd->c_min),
|
|
HEX) ||
|
|
ul_asc((u_long)MAJOR(arcn->sb.st_rdev),hd->c_rmaj,sizeof(hd->c_maj),
|
|
HEX) ||
|
|
ul_asc((u_long)MINOR(arcn->sb.st_rdev),hd->c_rmin,sizeof(hd->c_min),
|
|
HEX) ||
|
|
ul_asc((u_long)nsz, hd->c_namesize, sizeof(hd->c_namesize), HEX))
|
|
goto out;
|
|
|
|
/*
|
|
* write the header, the file name and padding as required.
|
|
*/
|
|
if ((wr_rdbuf((char *)&hdblk, (int)sizeof(HD_VCPIO)) < 0) ||
|
|
(wr_rdbuf(arcn->name, (int)nsz) < 0) ||
|
|
(wr_skip((off_t)(VCPIO_PAD(sizeof(HD_VCPIO) + nsz))) < 0)) {
|
|
paxwarn(1,"Could not write sv4cpio header for %s",arcn->org_name);
|
|
return(-1);
|
|
}
|
|
|
|
/*
|
|
* if we have file data, tell the caller we are done, copy the file
|
|
*/
|
|
if ((arcn->type == PAX_CTG) || (arcn->type == PAX_REG) ||
|
|
(arcn->type == PAX_HRG))
|
|
return(0);
|
|
|
|
/*
|
|
* if we are not a link, tell the caller we are done, go to next file
|
|
*/
|
|
if (arcn->type != PAX_SLK)
|
|
return(1);
|
|
|
|
/*
|
|
* write the link name, tell the caller we are done.
|
|
*/
|
|
if ((wr_rdbuf(arcn->ln_name, arcn->ln_nlen) < 0) ||
|
|
(wr_skip((off_t)(VCPIO_PAD(arcn->ln_nlen))) < 0)) {
|
|
paxwarn(1,"Could not write sv4cpio link name for %s",
|
|
arcn->org_name);
|
|
return(-1);
|
|
}
|
|
return(1);
|
|
|
|
out:
|
|
/*
|
|
* header field is out of range
|
|
*/
|
|
paxwarn(1,"Sv4cpio header field is too small for file %s",arcn->org_name);
|
|
return(1);
|
|
}
|
|
|
|
/*
|
|
* Routines common to the old binary header cpio
|
|
*/
|
|
|
|
/*
|
|
* bcpio_id()
|
|
* determine if a block given to us is an old binary cpio header
|
|
* (with/without header byte swapping)
|
|
* Return:
|
|
* 0 if a valid header, -1 otherwise
|
|
*/
|
|
|
|
int
|
|
bcpio_id(char *blk, int size)
|
|
{
|
|
if (size < (int)sizeof(HD_BCPIO))
|
|
return(-1);
|
|
|
|
/*
|
|
* check both normal and byte swapped magic cookies
|
|
*/
|
|
if (((u_short)SHRT_EXT(blk)) == MAGIC)
|
|
return(0);
|
|
if (((u_short)RSHRT_EXT(blk)) == MAGIC) {
|
|
if (!swp_head)
|
|
++swp_head;
|
|
return(0);
|
|
}
|
|
return(-1);
|
|
}
|
|
|
|
/*
|
|
* bcpio_rd()
|
|
* determine if a buffer is an old binary archive entry. (It may have byte
|
|
* swapped header) convert and store the values in the ARCHD parameter.
|
|
* This is a very old header format and should not really be used.
|
|
* Return:
|
|
* 0 if a valid header, -1 otherwise.
|
|
*/
|
|
|
|
int
|
|
bcpio_rd(ARCHD *arcn, char *buf)
|
|
{
|
|
HD_BCPIO *hd;
|
|
int nsz;
|
|
|
|
/*
|
|
* check the header
|
|
*/
|
|
if (bcpio_id(buf, sizeof(HD_BCPIO)) < 0)
|
|
return(-1);
|
|
|
|
arcn->pad = 0L;
|
|
hd = (HD_BCPIO *)buf;
|
|
if (swp_head) {
|
|
/*
|
|
* header has swapped bytes on 16 bit boundaries
|
|
*/
|
|
arcn->sb.st_dev = (dev_t)(RSHRT_EXT(hd->h_dev));
|
|
arcn->sb.st_ino = (ino_t)(RSHRT_EXT(hd->h_ino));
|
|
arcn->sb.st_mode = (mode_t)(RSHRT_EXT(hd->h_mode));
|
|
arcn->sb.st_uid = (uid_t)(RSHRT_EXT(hd->h_uid));
|
|
arcn->sb.st_gid = (gid_t)(RSHRT_EXT(hd->h_gid));
|
|
arcn->sb.st_nlink = (nlink_t)(RSHRT_EXT(hd->h_nlink));
|
|
arcn->sb.st_rdev = (dev_t)(RSHRT_EXT(hd->h_rdev));
|
|
arcn->sb.st_mtime = (time_t)(RSHRT_EXT(hd->h_mtime_1));
|
|
arcn->sb.st_mtime = (arcn->sb.st_mtime << 16) |
|
|
((time_t)(RSHRT_EXT(hd->h_mtime_2)));
|
|
arcn->sb.st_size = (off_t)(RSHRT_EXT(hd->h_filesize_1));
|
|
arcn->sb.st_size = (arcn->sb.st_size << 16) |
|
|
((off_t)(RSHRT_EXT(hd->h_filesize_2)));
|
|
nsz = (int)(RSHRT_EXT(hd->h_namesize));
|
|
} else {
|
|
arcn->sb.st_dev = (dev_t)(SHRT_EXT(hd->h_dev));
|
|
arcn->sb.st_ino = (ino_t)(SHRT_EXT(hd->h_ino));
|
|
arcn->sb.st_mode = (mode_t)(SHRT_EXT(hd->h_mode));
|
|
arcn->sb.st_uid = (uid_t)(SHRT_EXT(hd->h_uid));
|
|
arcn->sb.st_gid = (gid_t)(SHRT_EXT(hd->h_gid));
|
|
arcn->sb.st_nlink = (nlink_t)(SHRT_EXT(hd->h_nlink));
|
|
arcn->sb.st_rdev = (dev_t)(SHRT_EXT(hd->h_rdev));
|
|
arcn->sb.st_mtime = (time_t)(SHRT_EXT(hd->h_mtime_1));
|
|
arcn->sb.st_mtime = (arcn->sb.st_mtime << 16) |
|
|
((time_t)(SHRT_EXT(hd->h_mtime_2)));
|
|
arcn->sb.st_size = (off_t)(SHRT_EXT(hd->h_filesize_1));
|
|
arcn->sb.st_size = (arcn->sb.st_size << 16) |
|
|
((off_t)(SHRT_EXT(hd->h_filesize_2)));
|
|
nsz = (int)(SHRT_EXT(hd->h_namesize));
|
|
}
|
|
arcn->sb.st_ctime = arcn->sb.st_atime = arcn->sb.st_mtime;
|
|
|
|
/*
|
|
* check the file name size, if bogus give up. otherwise read the file
|
|
* name
|
|
*/
|
|
if (nsz < 2)
|
|
return(-1);
|
|
arcn->nlen = nsz - 1;
|
|
if (rd_nm(arcn, nsz) < 0)
|
|
return(-1);
|
|
|
|
/*
|
|
* header + file name are aligned to 2 byte boundaries, skip if needed
|
|
*/
|
|
if (rd_skip((off_t)(BCPIO_PAD(sizeof(HD_BCPIO) + nsz))) < 0)
|
|
return(-1);
|
|
|
|
/*
|
|
* if not a link (or a file with no data), calculate pad size (for
|
|
* padding which follows the file data), clear the link name and return
|
|
*/
|
|
if (((arcn->sb.st_mode & C_IFMT) != C_ISLNK)||(arcn->sb.st_size == 0)){
|
|
/*
|
|
* we have a valid header (not a link)
|
|
*/
|
|
arcn->ln_nlen = 0;
|
|
arcn->ln_name[0] = '\0';
|
|
arcn->pad = BCPIO_PAD(arcn->sb.st_size);
|
|
return(com_rd(arcn));
|
|
}
|
|
|
|
if ((rd_ln_nm(arcn) < 0) ||
|
|
(rd_skip((off_t)(BCPIO_PAD(arcn->sb.st_size))) < 0))
|
|
return(-1);
|
|
|
|
/*
|
|
* we have a valid header (with a link)
|
|
*/
|
|
return(com_rd(arcn));
|
|
}
|
|
|
|
/*
|
|
* bcpio_endrd()
|
|
* no cleanup needed here, just return size of the trailer (for append)
|
|
* Return:
|
|
* size of trailer header in this format
|
|
*/
|
|
|
|
off_t
|
|
bcpio_endrd(void)
|
|
{
|
|
return((off_t)(sizeof(HD_BCPIO) + sizeof(TRAILER) +
|
|
(BCPIO_PAD(sizeof(HD_BCPIO) + sizeof(TRAILER)))));
|
|
}
|
|
|
|
/*
|
|
* bcpio_wr()
|
|
* copy the data in the ARCHD to buffer in old binary cpio format
|
|
* There is a real chance of field overflow with this critter. So we
|
|
* always check that the conversion is ok. nobody in their right mind
|
|
* should write an archive in this format...
|
|
* Return
|
|
* 0 if file has data to be written after the header, 1 if file has NO
|
|
* data to write after the header, -1 if archive write failed
|
|
*/
|
|
|
|
int
|
|
bcpio_wr(ARCHD *arcn)
|
|
{
|
|
HD_BCPIO *hd;
|
|
int nsz;
|
|
HD_BCPIO hdblk;
|
|
off_t t_offt;
|
|
int t_int;
|
|
time_t t_timet;
|
|
|
|
/*
|
|
* check and repair truncated device and inode fields in the cpio
|
|
* header
|
|
*/
|
|
if (map_dev(arcn, (u_long)BCPIO_MASK, (u_long)BCPIO_MASK) < 0)
|
|
return(-1);
|
|
|
|
if ((arcn->type != PAX_BLK) && (arcn->type != PAX_CHR))
|
|
arcn->sb.st_rdev = 0;
|
|
hd = &hdblk;
|
|
|
|
switch(arcn->type) {
|
|
case PAX_CTG:
|
|
case PAX_REG:
|
|
case PAX_HRG:
|
|
/*
|
|
* caller will copy file data to the archive. tell him how
|
|
* much to pad.
|
|
*/
|
|
arcn->pad = BCPIO_PAD(arcn->sb.st_size);
|
|
hd->h_filesize_1[0] = CHR_WR_0(arcn->sb.st_size);
|
|
hd->h_filesize_1[1] = CHR_WR_1(arcn->sb.st_size);
|
|
hd->h_filesize_2[0] = CHR_WR_2(arcn->sb.st_size);
|
|
hd->h_filesize_2[1] = CHR_WR_3(arcn->sb.st_size);
|
|
t_offt = (off_t)(SHRT_EXT(hd->h_filesize_1));
|
|
t_offt = (t_offt<<16) | ((off_t)(SHRT_EXT(hd->h_filesize_2)));
|
|
if (arcn->sb.st_size != t_offt) {
|
|
paxwarn(1,"File is too large for bcpio format %s",
|
|
arcn->org_name);
|
|
return(1);
|
|
}
|
|
break;
|
|
case PAX_SLK:
|
|
/*
|
|
* no file data for the caller to process, the file data has
|
|
* the size of the link
|
|
*/
|
|
arcn->pad = 0L;
|
|
hd->h_filesize_1[0] = CHR_WR_0(arcn->ln_nlen);
|
|
hd->h_filesize_1[1] = CHR_WR_1(arcn->ln_nlen);
|
|
hd->h_filesize_2[0] = CHR_WR_2(arcn->ln_nlen);
|
|
hd->h_filesize_2[1] = CHR_WR_3(arcn->ln_nlen);
|
|
t_int = (int)(SHRT_EXT(hd->h_filesize_1));
|
|
t_int = (t_int << 16) | ((int)(SHRT_EXT(hd->h_filesize_2)));
|
|
if (arcn->ln_nlen != t_int)
|
|
goto out;
|
|
break;
|
|
default:
|
|
/*
|
|
* no file data for the caller to process
|
|
*/
|
|
arcn->pad = 0L;
|
|
hd->h_filesize_1[0] = (char)0;
|
|
hd->h_filesize_1[1] = (char)0;
|
|
hd->h_filesize_2[0] = (char)0;
|
|
hd->h_filesize_2[1] = (char)0;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* build up the rest of the fields
|
|
*/
|
|
hd->h_magic[0] = CHR_WR_2(MAGIC);
|
|
hd->h_magic[1] = CHR_WR_3(MAGIC);
|
|
hd->h_dev[0] = CHR_WR_2(arcn->sb.st_dev);
|
|
hd->h_dev[1] = CHR_WR_3(arcn->sb.st_dev);
|
|
if (arcn->sb.st_dev != (dev_t)(SHRT_EXT(hd->h_dev)))
|
|
goto out;
|
|
hd->h_ino[0] = CHR_WR_2(arcn->sb.st_ino);
|
|
hd->h_ino[1] = CHR_WR_3(arcn->sb.st_ino);
|
|
if (arcn->sb.st_ino != (ino_t)(SHRT_EXT(hd->h_ino)))
|
|
goto out;
|
|
hd->h_mode[0] = CHR_WR_2(arcn->sb.st_mode);
|
|
hd->h_mode[1] = CHR_WR_3(arcn->sb.st_mode);
|
|
if (arcn->sb.st_mode != (mode_t)(SHRT_EXT(hd->h_mode)))
|
|
goto out;
|
|
hd->h_uid[0] = CHR_WR_2(arcn->sb.st_uid);
|
|
hd->h_uid[1] = CHR_WR_3(arcn->sb.st_uid);
|
|
if (arcn->sb.st_uid != (uid_t)(SHRT_EXT(hd->h_uid)))
|
|
goto out;
|
|
hd->h_gid[0] = CHR_WR_2(arcn->sb.st_gid);
|
|
hd->h_gid[1] = CHR_WR_3(arcn->sb.st_gid);
|
|
if (arcn->sb.st_gid != (gid_t)(SHRT_EXT(hd->h_gid)))
|
|
goto out;
|
|
hd->h_nlink[0] = CHR_WR_2(arcn->sb.st_nlink);
|
|
hd->h_nlink[1] = CHR_WR_3(arcn->sb.st_nlink);
|
|
if (arcn->sb.st_nlink != (nlink_t)(SHRT_EXT(hd->h_nlink)))
|
|
goto out;
|
|
hd->h_rdev[0] = CHR_WR_2(arcn->sb.st_rdev);
|
|
hd->h_rdev[1] = CHR_WR_3(arcn->sb.st_rdev);
|
|
if (arcn->sb.st_rdev != (dev_t)(SHRT_EXT(hd->h_rdev)))
|
|
goto out;
|
|
hd->h_mtime_1[0] = CHR_WR_0(arcn->sb.st_mtime);
|
|
hd->h_mtime_1[1] = CHR_WR_1(arcn->sb.st_mtime);
|
|
hd->h_mtime_2[0] = CHR_WR_2(arcn->sb.st_mtime);
|
|
hd->h_mtime_2[1] = CHR_WR_3(arcn->sb.st_mtime);
|
|
t_timet = (time_t)(SHRT_EXT(hd->h_mtime_1));
|
|
t_timet = (t_timet << 16) | ((time_t)(SHRT_EXT(hd->h_mtime_2)));
|
|
if (arcn->sb.st_mtime != t_timet)
|
|
goto out;
|
|
nsz = arcn->nlen + 1;
|
|
hd->h_namesize[0] = CHR_WR_2(nsz);
|
|
hd->h_namesize[1] = CHR_WR_3(nsz);
|
|
if (nsz != (int)(SHRT_EXT(hd->h_namesize)))
|
|
goto out;
|
|
|
|
/*
|
|
* write the header, the file name and padding as required.
|
|
*/
|
|
if ((wr_rdbuf((char *)&hdblk, (int)sizeof(HD_BCPIO)) < 0) ||
|
|
(wr_rdbuf(arcn->name, nsz) < 0) ||
|
|
(wr_skip((off_t)(BCPIO_PAD(sizeof(HD_BCPIO) + nsz))) < 0)) {
|
|
paxwarn(1, "Could not write bcpio header for %s", arcn->org_name);
|
|
return(-1);
|
|
}
|
|
|
|
/*
|
|
* if we have file data, tell the caller we are done
|
|
*/
|
|
if ((arcn->type == PAX_CTG) || (arcn->type == PAX_REG) ||
|
|
(arcn->type == PAX_HRG))
|
|
return(0);
|
|
|
|
/*
|
|
* if we are not a link, tell the caller we are done, go to next file
|
|
*/
|
|
if (arcn->type != PAX_SLK)
|
|
return(1);
|
|
|
|
/*
|
|
* write the link name, tell the caller we are done.
|
|
*/
|
|
if ((wr_rdbuf(arcn->ln_name, arcn->ln_nlen) < 0) ||
|
|
(wr_skip((off_t)(BCPIO_PAD(arcn->ln_nlen))) < 0)) {
|
|
paxwarn(1,"Could not write bcpio link name for %s",arcn->org_name);
|
|
return(-1);
|
|
}
|
|
return(1);
|
|
|
|
out:
|
|
/*
|
|
* header field is out of range
|
|
*/
|
|
paxwarn(1,"Bcpio header field is too small for file %s", arcn->org_name);
|
|
return(1);
|
|
}
|