/
cpio.c
1240 lines (1121 loc) · 31.7 KB
/
cpio.c
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/* $OpenBSD: cpio.c,v 1.33 2017/09/16 07:42:34 otto Exp $ */
/* $NetBSD: cpio.c,v 1.5 1995/03/21 09:07:13 cgd Exp $ */
/*-
* Copyright (c) 2005, 2012, 2016, 2019
* mirabilos <m@mirbsd.org>
* 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.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#if HAVE_STRINGS_H
#include <strings.h>
#endif
#include <unistd.h>
#include "pax.h"
#include "cpio.h"
#include "extern.h"
__RCSID("$MirOS: src/bin/pax/cpio.c,v 1.28 2021/07/27 20:11:55 tg Exp $");
static int rd_nm(ARCHD *, int);
static int rd_ln_nm(ARCHD *);
static int com_rd(ARCHD *);
/*
* Routines which support the different cpio versions
*/
#ifndef SMALL
static int swp_head; /* binary cpio header byte swap */
#endif
/*
* 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_trail()
* 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_trail(ARCHD *arcn, char *notused MKSH_A_UNUSED,
int notused2 MKSH_A_UNUSED, int *notused3 MKSH_A_UNUSED)
{
/*
* 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_endwr()
* 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)strlcpy(last.name, TRAILER, sizeof(last.name));
return((*frmt->wr)(&last));
}
/*
* rd_nm()
* 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) || ((size_t)nsz > sizeof(arcn->name))) {
paxwarn(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')) {
paxwarn(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 >= (off_t)sizeof(arcn->ln_name))) {
paxwarn(1, "cpio link name length is invalid: %" OT_FMT,
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) {
paxwarn(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') {
paxwarn(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 < (int)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;
unsigned long long val;
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 = 0;
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);
val = asc_ull(hd->c_mtime, sizeof(hd->c_mtime), OCT);
if (val > MAX_TIME_T)
arcn->sb.st_mtime = INT_MAX; /* XXX 2038 */
else
arcn->sb.st_mtime = val;
arcn->sb.st_ctime = arcn->sb.st_atime = arcn->sb.st_mtime;
#if HAVE_ST_MTIMENSEC
arcn->sb.st_ctimensec = arcn->sb.st_atimensec = arcn->sb.st_mtimensec = 0;
#endif
arcn->sb.st_size = (off_t)asc_ull(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(int is_app MKSH_A_UNUSED)
{
if ((anonarch & ANON_INODES) && flnk_start())
return (-1);
return (dev_start());
}
#ifndef SMALL
int
dist_stwr(int is_app)
{
mircpio_deprecated("'dist' format",
"the cpio format with 512 bytes blocksize and -M dist");
anonarch &= ANON_DEBUG | ANON_VERBOSE;
anonarch |= ANON_UIDGID | ANON_INODES | ANON_HARDLINKS;
return (cpio_stwr(is_app));
}
#endif
/*
* 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)];
u_long t_uid, t_gid, t_dev;
ino_t t_ino;
time_t t_mtime;
anonarch_init();
/*
* check and repair truncated device and inode fields in the header
*/
if (map_dev(arcn, CPIO_MASK, CPIO_MASK) < 0)
return(-1);
arcn->pad = 0;
nsz = arcn->nlen + 1;
hd = (HD_CPIO *)hdblk;
if ((arcn->type != PAX_BLK) && (arcn->type != PAX_CHR))
arcn->sb.st_rdev = 0;
t_uid = (anonarch & ANON_UIDGID) ? 0UL : (u_long)arcn->sb.st_uid;
t_gid = (anonarch & ANON_UIDGID) ? 0UL : (u_long)arcn->sb.st_gid;
t_mtime = (anonarch & ANON_MTIME) ? 0 : arcn->sb.st_mtime;
t_ino = (anonarch & ANON_INODES) ? (ino_t)chk_flnk(arcn) :
arcn->sb.st_ino;
t_dev = (anonarch & ANON_INODES) ? 0UL : (u_long)arcn->sb.st_dev;
if (!cpio_trail(arcn, NULL, 0, NULL))
t_ino = 0UL;
if (t_ino == (ino_t)-1) {
paxwarn(1, "Invalid inode number for file %s", arcn->org_name);
return (1);
}
if (!(anonarch & ANON_HARDLINKS))
arcn->type &= ~PAX_LINKOR;
switch (arcn->type) {
case PAX_CTG:
case PAX_REG:
case PAX_HRG:
/*
* set data size for file data
*/
if (ull_asc(arcn->sb.st_size, hd->c_filesize,
sizeof(hd->c_filesize), OCT)) {
paxwarn(1, "File is too large for %s format %s",
"cpio", arcn->org_name);
return (1);
}
break;
case PAX_SLK:
/*
* set data size to hold link name
*/
if (ul_asc(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(0, hd->c_filesize, sizeof(hd->c_filesize), OCT))
goto out;
break;
}
#ifndef SMALL
if (anonarch & ANON_DEBUG)
paxwarn(0, "writing dev %lX inode %10lX mode %8lo user %ld:%ld"
"\n\tnlink %3ld mtime %08llX name '%s'", t_dev,
(u_long)t_ino, (u_long)arcn->sb.st_mode, t_uid, t_gid,
(u_long)arcn->sb.st_nlink, (unsigned long long)t_mtime,
arcn->name);
#endif
/*
* copy the values to the header using octal ascii
*/
if (ul_asc(MAGIC, hd->c_magic, sizeof(hd->c_magic), OCT) ||
ul_asc(t_dev, hd->c_dev, sizeof(hd->c_dev), OCT) ||
ul_asc((u_long)t_ino, hd->c_ino, sizeof(hd->c_ino), OCT) ||
ul_asc(arcn->sb.st_mode, hd->c_mode, sizeof(hd->c_mode), OCT) ||
ul_asc(t_uid, hd->c_uid, sizeof(hd->c_uid), OCT) ||
ul_asc(t_gid, hd->c_gid, sizeof(hd->c_gid), OCT) ||
ul_asc(arcn->sb.st_nlink, hd->c_nlink, sizeof(hd->c_nlink), OCT) ||
ul_asc(arcn->sb.st_rdev, hd->c_rdev, sizeof(hd->c_rdev), OCT) ||
ull_asc(t_mtime < 0 ? 0ULL : (unsigned long long)t_mtime, hd->c_mtime, sizeof(hd->c_mtime), OCT) ||
ul_asc(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)) {
paxwarn(1, "Unable to write %s %s for %s",
"cpio", "header", 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 (PAX_IS_REG(arcn->type) || (arcn->type == PAX_HRG))
return (0);
if (arcn->type & PAX_LINKOR) {
arcn->type &= ~PAX_LINKOR;
return (1);
}
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) {
paxwarn(1, "Unable to write %s %s for %s",
"cpio", "link name", arcn->org_name);
return (-1);
}
return(1);
out:
/*
* header field is out of range
*/
paxwarn(1, "%s header field is too small for file %s",
"cpio", 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 < (int)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 < (int)sizeof(HD_VCPIO)) ||
(strncmp(blk, AVCMAGIC, 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 = 0;
/*
* 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;
#if HAVE_ST_MTIMENSEC
arcn->sb.st_ctimensec = arcn->sb.st_atimensec = arcn->sb.st_mtimensec = 0;
#endif
arcn->sb.st_size = (off_t)asc_ull(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_rmaj), HEX);
devminor = (dev_t)asc_ul(hd->c_rmin, sizeof(hd->c_rmin), 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(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(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 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(int is_app MKSH_A_UNUSED)
{
docrc = 1;
if ((anonarch & ANON_INODES) && flnk_start())
return (-1);
return(dev_start());
}
#ifndef SMALL
int
v4root_stwr(int is_app)
{
mircpio_deprecated("'v4norm' format",
"the sv4crc format with 512 bytes blocksize and -M root");
anonarch &= ANON_DEBUG | ANON_VERBOSE;
anonarch |= ANON_UIDGID | ANON_INODES;
return (crc_stwr(is_app));
}
int
v4norm_stwr(int is_app)
{
mircpio_deprecated("'v4norm' format",
"the sv4crc format with 512 bytes blocksize and -M norm");
anonarch &= ANON_DEBUG | ANON_VERBOSE;
anonarch |= ANON_UIDGID | ANON_INODES | ANON_MTIME | ANON_HARDLINKS;
return (crc_stwr(is_app));
}
#endif
/*
* 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)];
u_long t_uid, t_gid, t_major, t_minor;
ino_t t_ino;
time_t t_mtime;
anonarch_init();
/*
* check and repair truncated device and inode fields in the cpio
* header
*/
if (map_dev(arcn, VCPIO_MASK, 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(VCMAGIC, hd->c_magic, sizeof(hd->c_magic), OCT) ||
ul_asc(arcn->crc,hd->c_chksum,sizeof(hd->c_chksum), HEX))
goto out;
} else {
if (ul_asc(VMAGIC, hd->c_magic, sizeof(hd->c_magic), OCT) ||
ul_asc(0, hd->c_chksum, sizeof(hd->c_chksum),HEX))
goto out;
}
t_uid = (anonarch & ANON_UIDGID) ? 0UL : (u_long)arcn->sb.st_uid;
t_gid = (anonarch & ANON_UIDGID) ? 0UL : (u_long)arcn->sb.st_gid;
t_mtime = (anonarch & ANON_MTIME) ? 0 : arcn->sb.st_mtime;
t_ino = (anonarch & ANON_INODES) ? (ino_t)chk_flnk(arcn) :
arcn->sb.st_ino;
t_major = (anonarch & ANON_INODES) ? 0UL : (u_long)MAJOR(arcn->sb.st_dev);
t_minor = (anonarch & ANON_INODES) ? 0UL : (u_long)MINOR(arcn->sb.st_dev);
if (!cpio_trail(arcn, NULL, 0, NULL))
t_ino = 0UL;
if (t_ino == (ino_t)-1) {
paxwarn(1, "Invalid inode number for file %s", arcn->org_name);
return (1);
}
if (!(anonarch & ANON_HARDLINKS))
arcn->type &= ~PAX_LINKOR;
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 (ull_asc(arcn->sb.st_size, hd->c_filesize,
sizeof(hd->c_filesize), HEX)) {
paxwarn(1, "File is too large for %s format %s",
"sv4cpio", 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 = 0;
if (ul_asc(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 = 0;
if (ul_asc(0, hd->c_filesize, sizeof(hd->c_filesize), HEX))
goto out;
break;
}
#ifndef SMALL
if (anonarch & ANON_DEBUG)
paxwarn(0, "writing dev %lX:%lx inode %10lX mode %8lo user %ld:%ld"
"\n\tnlink %3ld mtime %08llX name '%s'", t_major, t_minor,
(u_long)t_ino, (u_long)arcn->sb.st_mode, t_uid, t_gid,
(u_long)arcn->sb.st_nlink, (unsigned long long)t_mtime,
arcn->name);
#endif
/*
* set the other fields in the header
*/
if (ul_asc(t_ino, hd->c_ino, sizeof(hd->c_ino), HEX) ||
ul_asc(arcn->sb.st_mode, hd->c_mode, sizeof(hd->c_mode), HEX) ||
ul_asc(t_uid, hd->c_uid, sizeof(hd->c_uid), HEX) ||
ul_asc(t_gid, hd->c_gid, sizeof(hd->c_gid), HEX) ||
ul_asc(t_mtime < 0 ? 0 : t_mtime, hd->c_mtime,
sizeof(hd->c_mtime), HEX) ||
ul_asc(arcn->sb.st_nlink, hd->c_nlink, sizeof(hd->c_nlink), HEX) ||
/* device major:minor of the device the file resides on */
ul_asc(t_major, hd->c_maj, sizeof(hd->c_maj), HEX) ||
ul_asc(t_minor, hd->c_min, sizeof(hd->c_min), HEX) ||
/* device major:minor of the file if it's a device node */
ul_asc(MAJOR(arcn->sb.st_rdev), hd->c_rmaj, sizeof(hd->c_rmaj), HEX) ||
ul_asc(MINOR(arcn->sb.st_rdev), hd->c_rmin, sizeof(hd->c_rmin), HEX) ||
ul_asc(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(VCPIO_PAD(sizeof(HD_VCPIO) + nsz)) < 0)) {
paxwarn(1, "Unable to write %s %s for %s",
"sv4cpio", "header", arcn->org_name);
return (-1);
}
/*
* if we have file data, tell the caller we are done, copy the file
*/
if (PAX_IS_REG(arcn->type) || (arcn->type == PAX_HRG))
return(0);
/*
* if we are a detected hard link, we're done too, but no data written
*/
if (arcn->type & PAX_LINKOR) {
arcn->type &= ~PAX_LINKOR;
return (1);
}
/*
* 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(VCPIO_PAD(arcn->ln_nlen)) < 0)) {
paxwarn(1, "Unable to write %s %s for %s",
"sv4cpio", "link name", arcn->org_name);
return (-1);
}
return(1);
out:
/*
* header field is out of range
*/
paxwarn(1, "%s header field is too small for file %s",
"sv4cpio", arcn->org_name);
return (1);
}
#ifndef SMALL
/*
* 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 < (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 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 = 0;
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) |