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cpio.c
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/* $NetBSD: cpio.c,v 1.6 2007/03/08 17:18:18 rillig Exp $ */
/*-
* Copyright (c) 1992 Keith Muller.
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Keith Muller of the University of California, San Diego.
*
* 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.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#if HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#endif
#include <nbcompat.h>
#if HAVE_SYS_CDEFS_H
#include <sys/cdefs.h>
#endif
#if !defined(lint)
#if 0
static char sccsid[] = "@(#)cpio.c 8.1 (Berkeley) 5/31/93";
#else
__RCSID("$NetBSD: cpio.c,v 1.6 2007/03/08 17:18:18 rillig Exp $");
#endif
#endif /* not lint */
#if HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#if HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#if HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#if HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
#if HAVE_STRING_H
#include <string.h>
#endif
#if HAVE_CTYPE_H
#include <ctype.h>
#endif
#if HAVE_STDIO_H
#include <stdio.h>
#endif
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#if HAVE_STDLIB_H
#include <stdlib.h>
#endif
#include "pax.h"
#include "cpio.h"
#include "extern.h"
static int rd_nm(ARCHD *, int);
static int rd_ln_nm(ARCHD *);
static int com_rd(ARCHD *);
/*
* Routines which support the different cpio versions
*/
int cpio_swp_head; /* binary cpio header byte swap */
/*
* Routines common to all versions of cpio
*/
/*
* cpio_strd()
* Fire up the hard link detection code
* Return:
* 0 if ok -1 otherwise (the return values of lnk_start())
*/
int
cpio_strd(void)
{
return(lnk_start());
}
/*
* cpio_subtrail()
* Called to determine if a header block is a valid trailer. We are
* passed the block, the in_sync flag (which tells us we are in resync
* mode; looking for a valid header), and cnt (which starts at zero)
* which is used to count the number of empty blocks we have seen so far.
* Return:
* 0 if a valid trailer, -1 if not a valid trailer,
*/
int
cpio_subtrail(ARCHD *arcn)
{
/*
* look for trailer id in file we are about to process
*/
if ((strcmp(arcn->name, TRAILER) == 0) && (arcn->sb.st_size == 0))
return 0;
return -1;
}
/*
* com_rd()
* operations common to all cpio read functions.
* Return:
* 0
*/
static int
com_rd(ARCHD *arcn)
{
arcn->skip = 0;
arcn->pat = NULL;
arcn->org_name = arcn->name;
switch(arcn->sb.st_mode & C_IFMT) {
case C_ISFIFO:
arcn->type = PAX_FIF;
break;
case C_ISDIR:
arcn->type = PAX_DIR;
break;
case C_ISBLK:
arcn->type = PAX_BLK;
break;
case C_ISCHR:
arcn->type = PAX_CHR;
break;
case C_ISLNK:
arcn->type = PAX_SLK;
break;
case C_ISOCK:
arcn->type = PAX_SCK;
break;
case C_ISCTG:
case C_ISREG:
default:
/*
* we have file data, set up skip (pad is set in the format
* specific sections)
*/
arcn->sb.st_mode = (arcn->sb.st_mode & 0xfff) | C_ISREG;
arcn->type = PAX_REG;
arcn->skip = arcn->sb.st_size;
break;
}
if (chk_lnk(arcn) < 0)
return -1;
return 0;
}
/*
* cpio_end_wr()
* write the special file with the name trailer in the proper format
* Return:
* result of the write of the trailer from the cpio specific write func
*/
int
cpio_endwr(void)
{
ARCHD last;
/*
* create a trailer request and call the proper format write function
*/
memset(&last, 0, sizeof(last));
last.nlen = sizeof(TRAILER) - 1;
last.type = PAX_REG;
last.sb.st_nlink = 1;
(void)strcpy(last.name, TRAILER);
return((*frmt->wr)(&last));
}
/*
* rd_nam()
* read in the file name which follows the cpio header
* Return:
* 0 if ok, -1 otherwise
*/
static int
rd_nm(ARCHD *arcn, int nsz)
{
/*
* do not even try bogus values
*/
if ((nsz == 0) || (nsz > sizeof(arcn->name))) {
tty_warn(1, "Cpio file name length %d is out of range", nsz);
return -1;
}
/*
* read the name and make sure it is not empty and is \0 terminated
*/
if ((rd_wrbuf(arcn->name,nsz) != nsz) || (arcn->name[nsz-1] != '\0') ||
(arcn->name[0] == '\0')) {
tty_warn(1, "Cpio file name in header is corrupted");
return -1;
}
return 0;
}
/*
* rd_ln_nm()
* read in the link name for a file with links. The link name is stored
* like file data (and is NOT \0 terminated!)
* Return:
* 0 if ok, -1 otherwise
*/
static int
rd_ln_nm(ARCHD *arcn)
{
/*
* check the length specified for bogus values
*/
if ((arcn->sb.st_size == 0) ||
(arcn->sb.st_size >= sizeof(arcn->ln_name))) {
tty_warn(1, "Cpio link name length is invalid: " OFFT_F,
(OFFT_T) arcn->sb.st_size);
return -1;
}
/*
* read in the link name and \0 terminate it
*/
if (rd_wrbuf(arcn->ln_name, (int)arcn->sb.st_size) !=
(int)arcn->sb.st_size) {
tty_warn(1, "Cpio link name read error");
return -1;
}
arcn->ln_nlen = arcn->sb.st_size;
arcn->ln_name[arcn->ln_nlen] = '\0';
/*
* watch out for those empty link names
*/
if (arcn->ln_name[0] == '\0') {
tty_warn(1, "Cpio link name is corrupt");
return -1;
}
return 0;
}
/*
* Routines common to the extended byte oriented cpio format
*/
/*
* cpio_id()
* determine if a block given to us is a valid extended byte oriented
* cpio header
* Return:
* 0 if a valid header, -1 otherwise
*/
int
cpio_id(char *blk, int size)
{
if ((size < sizeof(HD_CPIO)) ||
(strncmp(blk, AMAGIC, sizeof(AMAGIC) - 1) != 0))
return -1;
return 0;
}
/*
* cpio_rd()
* determine if a buffer is a byte oriented extended cpio archive entry.
* convert and store the values in the ARCHD parameter.
* Return:
* 0 if a valid header, -1 otherwise.
*/
int
cpio_rd(ARCHD *arcn, char *buf)
{
int nsz;
HD_CPIO *hd;
/*
* check that this is a valid header, if not return -1
*/
if (cpio_id(buf, sizeof(HD_CPIO)) < 0)
return -1;
hd = (HD_CPIO *)buf;
/*
* byte oriented cpio (posix) does not have padding! extract the octal
* ascii fields from the header
*/
arcn->pad = 0L;
arcn->sb.st_dev = (dev_t)asc_ul(hd->c_dev, sizeof(hd->c_dev), OCT);
arcn->sb.st_ino = (ino_t)asc_ul(hd->c_ino, sizeof(hd->c_ino), OCT);
arcn->sb.st_mode = (mode_t)asc_ul(hd->c_mode, sizeof(hd->c_mode), OCT);
arcn->sb.st_uid = (uid_t)asc_ul(hd->c_uid, sizeof(hd->c_uid), OCT);
arcn->sb.st_gid = (gid_t)asc_ul(hd->c_gid, sizeof(hd->c_gid), OCT);
arcn->sb.st_nlink = (nlink_t)asc_ul(hd->c_nlink, sizeof(hd->c_nlink),
OCT);
arcn->sb.st_rdev = (dev_t)asc_ul(hd->c_rdev, sizeof(hd->c_rdev), OCT);
arcn->sb.st_mtime = (time_t)asc_ul(hd->c_mtime, sizeof(hd->c_mtime),
OCT);
arcn->sb.st_ctime = arcn->sb.st_atime = arcn->sb.st_mtime;
arcn->sb.st_size = (off_t)ASC_OFFT(hd->c_filesize,
sizeof(hd->c_filesize), OCT);
/*
* check name size and if valid, read in the name of this entry (name
* follows header in the archive)
*/
if ((nsz = (int)asc_ul(hd->c_namesize,sizeof(hd->c_namesize),OCT)) < 2)
return -1;
arcn->nlen = nsz - 1;
if (rd_nm(arcn, nsz) < 0)
return -1;
if (((arcn->sb.st_mode&C_IFMT) != C_ISLNK)||(arcn->sb.st_size == 0)) {
/*
* no link name to read for this file
*/
arcn->ln_nlen = 0;
arcn->ln_name[0] = '\0';
return(com_rd(arcn));
}
/*
* check link name size and read in the link name. Link names are
* stored like file data.
*/
if (rd_ln_nm(arcn) < 0)
return -1;
/*
* we have a valid header (with a link)
*/
return(com_rd(arcn));
}
/*
* cpio_endrd()
* no cleanup needed here, just return size of the trailer (for append)
* Return:
* size of trailer header in this format
*/
off_t
cpio_endrd(void)
{
return((off_t)(sizeof(HD_CPIO) + sizeof(TRAILER)));
}
/*
* cpio_stwr()
* start up the device mapping table
* Return:
* 0 if ok, -1 otherwise (what dev_start() returns)
*/
int
cpio_stwr(void)
{
return(dev_start());
}
/*
* cpio_wr()
* copy the data in the ARCHD to buffer in extended byte oriented cpio
* 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
cpio_wr(ARCHD *arcn)
{
HD_CPIO *hd;
int nsz;
char hdblk[sizeof(HD_CPIO)];
/*
* check and repair truncated device and inode fields in the header
*/
if (map_dev(arcn, (u_long)CPIO_MASK, (u_long)CPIO_MASK) < 0)
return -1;
arcn->pad = 0L;
nsz = arcn->nlen + 1;
hd = (HD_CPIO *)hdblk;
if ((arcn->type != PAX_BLK) && (arcn->type != PAX_CHR))
arcn->sb.st_rdev = 0;
switch(arcn->type) {
case PAX_CTG:
case PAX_REG:
case PAX_HRG:
/*
* set data size for file data
*/
if (OFFT_ASC(arcn->sb.st_size, hd->c_filesize,
sizeof(hd->c_filesize), OCT)) {
tty_warn(1,"File is too large for cpio format %s",
arcn->org_name);
return 1;
}
break;
case PAX_SLK:
/*
* set data size to hold link name
*/
if (ul_asc((u_long)arcn->ln_nlen, hd->c_filesize,
sizeof(hd->c_filesize), OCT))
goto out;
break;
default:
/*
* all other file types have no file data
*/
if (ul_asc((u_long)0, hd->c_filesize, sizeof(hd->c_filesize),
OCT))
goto out;
break;
}
/*
* copy the values to the header using octal ascii
*/
if (ul_asc((u_long)MAGIC, hd->c_magic, sizeof(hd->c_magic), OCT) ||
ul_asc((u_long)arcn->sb.st_dev, hd->c_dev, sizeof(hd->c_dev),
OCT) ||
ul_asc((u_long)arcn->sb.st_ino, hd->c_ino, sizeof(hd->c_ino),
OCT) ||
ul_asc((u_long)arcn->sb.st_mode, hd->c_mode, sizeof(hd->c_mode),
OCT) ||
ul_asc((u_long)arcn->sb.st_uid, hd->c_uid, sizeof(hd->c_uid),
OCT) ||
ul_asc((u_long)arcn->sb.st_gid, hd->c_gid, sizeof(hd->c_gid),
OCT) ||
ul_asc((u_long)arcn->sb.st_nlink, hd->c_nlink, sizeof(hd->c_nlink),
OCT) ||
ul_asc((u_long)arcn->sb.st_rdev, hd->c_rdev, sizeof(hd->c_rdev),
OCT) ||
ul_asc((u_long)arcn->sb.st_mtime,hd->c_mtime,sizeof(hd->c_mtime),
OCT) ||
ul_asc((u_long)nsz, hd->c_namesize, sizeof(hd->c_namesize), OCT))
goto out;
/*
* write the file name to the archive
*/
if ((wr_rdbuf(hdblk, (int)sizeof(HD_CPIO)) < 0) ||
(wr_rdbuf(arcn->name, nsz) < 0)) {
tty_warn(1, "Unable to write cpio header for %s",
arcn->org_name);
return -1;
}
/*
* if this file has data, we are done. The caller will write the file
* data, if we are link tell caller we are done, go to next file
*/
if ((arcn->type == PAX_CTG) || (arcn->type == PAX_REG))
return 0;
if (arcn->type != PAX_SLK)
return 1;
/*
* write the link name to the archive, tell the caller to go to the
* next file as we are done.
*/
if (wr_rdbuf(arcn->ln_name, arcn->ln_nlen) < 0) {
tty_warn(1,"Unable to write cpio link name for %s",
arcn->org_name);
return -1;
}
return 1;
out:
/*
* header field is out of range
*/
tty_warn(1, "Cpio header field is too small to store file %s",
arcn->org_name);
return 1;
}
/*
* Routines common to the system VR4 version of cpio (with/without file CRC)
*/
/*
* vcpio_id()
* 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:
* 0 if a valid header, -1 otherwise
*/
int
vcpio_id(char *blk, int size)
{
if ((size < sizeof(HD_VCPIO)) ||
(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:
* 0 if a valid header, -1 otherwise
*/
int
crc_id(char *blk, int size)
{
if ((size < sizeof(HD_VCPIO)) ||
(strncmp(blk, AVCMAGIC, sizeof(AVCMAGIC) - 1) != 0))
return -1;
return 0;
}
/*
* crc_strd()
* 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_ul(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_OFFT(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;
char hdblk[sizeof(HD_VCPIO)];
/*
* 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 = (HD_VCPIO *)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 (OFFT_ASC(arcn->sb.st_size, hd->c_filesize,
sizeof(hd->c_filesize), HEX)) {
tty_warn(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(hdblk, (int)sizeof(HD_VCPIO)) < 0) ||
(wr_rdbuf(arcn->name, (int)nsz) < 0) ||
(wr_skip((off_t)(VCPIO_PAD(sizeof(HD_VCPIO) + nsz))) < 0)) {
tty_warn(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)) {
tty_warn(1,"Could not write sv4cpio link name for %s",
arcn->org_name);
return -1;
}
return 1;
out:
/*
* header field is out of range
*/
tty_warn(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 a 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 < 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 (!cpio_swp_head)
++cpio_swp_head;
return 0;
}
return -1;
}
/*
* bcpio_rd()
* determine if a buffer is a 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 (cpio_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 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