1 /* $OpenBSD: cpio.c,v 1.18 2008/01/01 16:22:44 tobias Exp $ */
2 /* $NetBSD: cpio.c,v 1.5 1995/03/21 09:07:13 cgd Exp $ */
5 * Copyright (c) 1992 Keith Muller.
6 * Copyright (c) 1992, 1993
7 * The Regents of the University of California. All rights reserved.
9 * This code is derived from software contributed to Berkeley by
10 * Keith Muller of the University of California, San Diego.
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
39 static const char sccsid[] = "@(#)cpio.c 8.1 (Berkeley) 5/31/93";
41 static const char rcsid[] = "$OpenBSD: cpio.c,v 1.18 2008/01/01 16:22:44 tobias Exp $";
45 #include <sys/types.h>
48 #include <sys/param.h>
57 static int rd_nm(ARCHD *, int);
58 static int rd_ln_nm(ARCHD *);
59 static int com_rd(ARCHD *);
62 * Routines which support the different cpio versions
65 static int swp_head; /* binary cpio header byte swap */
68 * Routines common to all versions of cpio
73 * Fire up the hard link detection code
75 * 0 if ok -1 otherwise (the return values of lnk_start())
86 * Called to determine if a header block is a valid trailer. We are
87 * passed the block, the in_sync flag (which tells us we are in resync
88 * mode; looking for a valid header), and cnt (which starts at zero)
89 * which is used to count the number of empty blocks we have seen so far.
91 * 0 if a valid trailer, -1 if not a valid trailer,
95 cpio_trail(ARCHD *arcn, char *notused, int notused2, int *notused3)
98 * look for trailer id in file we are about to process
100 if ((strcmp(arcn->name, TRAILER) == 0) && (arcn->sb.st_size == 0))
107 * operations common to all cpio read functions.
117 arcn->org_name = arcn->name;
118 switch (arcn->sb.st_mode & C_IFMT) {
120 arcn->type = PAX_FIF;
123 arcn->type = PAX_DIR;
126 arcn->type = PAX_BLK;
129 arcn->type = PAX_CHR;
132 arcn->type = PAX_SLK;
135 arcn->type = PAX_SCK;
141 * we have file data, set up skip (pad is set in the format
144 arcn->sb.st_mode = (arcn->sb.st_mode & 0xfff) | C_ISREG;
145 arcn->type = PAX_REG;
146 arcn->skip = arcn->sb.st_size;
149 if (chk_lnk(arcn) < 0)
156 * write the special file with the name trailer in the proper format
158 * result of the write of the trailer from the cpio specific write func
167 * create a trailer request and call the proper format write function
169 memset(&last, 0, sizeof(last));
170 last.nlen = sizeof(TRAILER) - 1;
172 last.sb.st_nlink = 1;
173 (void)strlcpy(last.name, TRAILER, sizeof(last.name));
174 return((*frmt->wr)(&last));
179 * read in the file name which follows the cpio header
181 * 0 if ok, -1 otherwise
185 rd_nm(ARCHD *arcn, int nsz)
188 * do not even try bogus values
190 if ((nsz == 0) || (nsz > sizeof(arcn->name))) {
191 paxwarn(1, "Cpio file name length %d is out of range", nsz);
196 * read the name and make sure it is not empty and is \0 terminated
198 if ((rd_wrbuf(arcn->name,nsz) != nsz) || (arcn->name[nsz-1] != '\0') ||
199 (arcn->name[0] == '\0')) {
200 paxwarn(1, "Cpio file name in header is corrupted");
208 * read in the link name for a file with links. The link name is stored
209 * like file data (and is NOT \0 terminated!)
211 * 0 if ok, -1 otherwise
215 rd_ln_nm(ARCHD *arcn)
218 * check the length specified for bogus values
220 if ((arcn->sb.st_size == 0) ||
221 (arcn->sb.st_size >= sizeof(arcn->ln_name))) {
223 paxwarn(1, "Cpio link name length is invalid: %lu",
226 paxwarn(1, "Cpio link name length is invalid: %qu",
233 * read in the link name and \0 terminate it
235 if (rd_wrbuf(arcn->ln_name, (int)arcn->sb.st_size) !=
236 (int)arcn->sb.st_size) {
237 paxwarn(1, "Cpio link name read error");
240 arcn->ln_nlen = arcn->sb.st_size;
241 arcn->ln_name[arcn->ln_nlen] = '\0';
244 * watch out for those empty link names
246 if (arcn->ln_name[0] == '\0') {
247 paxwarn(1, "Cpio link name is corrupt");
254 * Routines common to the extended byte oriented cpio format
259 * determine if a block given to us is a valid extended byte oriented
262 * 0 if a valid header, -1 otherwise
266 cpio_id(char *blk, int size)
268 if ((size < sizeof(HD_CPIO)) ||
269 (strncmp(blk, AMAGIC, sizeof(AMAGIC) - 1) != 0))
276 * determine if a buffer is a byte oriented extended cpio archive entry.
277 * convert and store the values in the ARCHD parameter.
279 * 0 if a valid header, -1 otherwise.
283 cpio_rd(ARCHD *arcn, char *buf)
289 * check that this is a valid header, if not return -1
291 if (cpio_id(buf, sizeof(HD_CPIO)) < 0)
296 * byte oriented cpio (posix) does not have padding! extract the octal
297 * ascii fields from the header
300 arcn->sb.st_dev = (dev_t)asc_ul(hd->c_dev, sizeof(hd->c_dev), OCT);
301 arcn->sb.st_ino = (ino_t)asc_ul(hd->c_ino, sizeof(hd->c_ino), OCT);
302 arcn->sb.st_mode = (mode_t)asc_ul(hd->c_mode, sizeof(hd->c_mode), OCT);
303 arcn->sb.st_uid = (uid_t)asc_ul(hd->c_uid, sizeof(hd->c_uid), OCT);
304 arcn->sb.st_gid = (gid_t)asc_ul(hd->c_gid, sizeof(hd->c_gid), OCT);
305 arcn->sb.st_nlink = (nlink_t)asc_ul(hd->c_nlink, sizeof(hd->c_nlink),
307 arcn->sb.st_rdev = (dev_t)asc_ul(hd->c_rdev, sizeof(hd->c_rdev), OCT);
308 arcn->sb.st_mtime = (time_t)asc_ul(hd->c_mtime, sizeof(hd->c_mtime),
310 arcn->sb.st_ctime = arcn->sb.st_atime = arcn->sb.st_mtime;
312 arcn->sb.st_size = (off_t)asc_ul(hd->c_filesize,sizeof(hd->c_filesize),
315 arcn->sb.st_size = (off_t)asc_uqd(hd->c_filesize,sizeof(hd->c_filesize),
320 * check name size and if valid, read in the name of this entry (name
321 * follows header in the archive)
323 if ((nsz = (int)asc_ul(hd->c_namesize,sizeof(hd->c_namesize),OCT)) < 2)
325 arcn->nlen = nsz - 1;
326 if (rd_nm(arcn, nsz) < 0)
329 if (((arcn->sb.st_mode&C_IFMT) != C_ISLNK)||(arcn->sb.st_size == 0)) {
331 * no link name to read for this file
334 arcn->ln_name[0] = '\0';
335 return(com_rd(arcn));
339 * check link name size and read in the link name. Link names are
340 * stored like file data.
342 if (rd_ln_nm(arcn) < 0)
346 * we have a valid header (with a link)
348 return(com_rd(arcn));
353 * no cleanup needed here, just return size of the trailer (for append)
355 * size of trailer header in this format
361 return((off_t)(sizeof(HD_CPIO) + sizeof(TRAILER)));
366 * start up the device mapping table
368 * 0 if ok, -1 otherwise (what dev_start() returns)
379 * copy the data in the ARCHD to buffer in extended byte oriented cpio
382 * 0 if file has data to be written after the header, 1 if file has NO
383 * data to write after the header, -1 if archive write failed
391 char hdblk[sizeof(HD_CPIO)];
394 * check and repair truncated device and inode fields in the header
396 if (map_dev(arcn, (u_long)CPIO_MASK, (u_long)CPIO_MASK) < 0)
400 nsz = arcn->nlen + 1;
401 hd = (HD_CPIO *)hdblk;
402 if ((arcn->type != PAX_BLK) && (arcn->type != PAX_CHR))
403 arcn->sb.st_rdev = 0;
405 switch (arcn->type) {
410 * set data size for file data
413 if (ul_asc((u_long)arcn->sb.st_size, hd->c_filesize,
414 sizeof(hd->c_filesize), OCT)) {
416 if (uqd_asc((u_quad_t)arcn->sb.st_size, hd->c_filesize,
417 sizeof(hd->c_filesize), OCT)) {
419 paxwarn(1,"File is too large for cpio format %s",
426 * set data size to hold link name
428 if (ul_asc((u_long)arcn->ln_nlen, hd->c_filesize,
429 sizeof(hd->c_filesize), OCT))
434 * all other file types have no file data
436 if (ul_asc((u_long)0, hd->c_filesize, sizeof(hd->c_filesize),
443 * copy the values to the header using octal ascii
445 if (ul_asc((u_long)MAGIC, hd->c_magic, sizeof(hd->c_magic), OCT) ||
446 ul_asc((u_long)arcn->sb.st_dev, hd->c_dev, sizeof(hd->c_dev),
448 ul_asc((u_long)arcn->sb.st_ino, hd->c_ino, sizeof(hd->c_ino),
450 ul_asc((u_long)arcn->sb.st_mode, hd->c_mode, sizeof(hd->c_mode),
452 ul_asc((u_long)arcn->sb.st_uid, hd->c_uid, sizeof(hd->c_uid),
454 ul_asc((u_long)arcn->sb.st_gid, hd->c_gid, sizeof(hd->c_gid),
456 ul_asc((u_long)arcn->sb.st_nlink, hd->c_nlink, sizeof(hd->c_nlink),
458 ul_asc((u_long)arcn->sb.st_rdev, hd->c_rdev, sizeof(hd->c_rdev),
460 ul_asc((u_long)arcn->sb.st_mtime,hd->c_mtime,sizeof(hd->c_mtime),
462 ul_asc((u_long)nsz, hd->c_namesize, sizeof(hd->c_namesize), OCT))
466 * write the file name to the archive
468 if ((wr_rdbuf(hdblk, (int)sizeof(HD_CPIO)) < 0) ||
469 (wr_rdbuf(arcn->name, nsz) < 0)) {
470 paxwarn(1, "Unable to write cpio header for %s", arcn->org_name);
475 * if this file has data, we are done. The caller will write the file
476 * data, if we are link tell caller we are done, go to next file
478 if ((arcn->type == PAX_CTG) || (arcn->type == PAX_REG) ||
479 (arcn->type == PAX_HRG))
481 if (arcn->type != PAX_SLK)
485 * write the link name to the archive, tell the caller to go to the
486 * next file as we are done.
488 if (wr_rdbuf(arcn->ln_name, arcn->ln_nlen) < 0) {
489 paxwarn(1,"Unable to write cpio link name for %s",arcn->org_name);
496 * header field is out of range
498 paxwarn(1, "Cpio header field is too small to store file %s",
504 * Routines common to the system VR4 version of cpio (with/without file CRC)
509 * determine if a block given to us is a valid system VR4 cpio header
510 * WITHOUT crc. WATCH it the magic cookies are in OCTAL, the header
513 * 0 if a valid header, -1 otherwise
517 vcpio_id(char *blk, int size)
519 if ((size < sizeof(HD_VCPIO)) ||
520 (strncmp(blk, AVMAGIC, sizeof(AVMAGIC) - 1) != 0))
527 * determine if a block given to us is a valid system VR4 cpio header
528 * WITH crc. WATCH it the magic cookies are in OCTAL the header uses HEX
530 * 0 if a valid header, -1 otherwise
534 crc_id(char *blk, int size)
536 if ((size < sizeof(HD_VCPIO)) ||
537 (strncmp(blk, AVCMAGIC, sizeof(AVCMAGIC) - 1) != 0))
544 w set file data CRC calculations. Fire up the hard link detection code
546 * 0 if ok -1 otherwise (the return values of lnk_start())
558 * determine if a buffer is a system VR4 archive entry. (with/without CRC)
559 * convert and store the values in the ARCHD parameter.
561 * 0 if a valid header, -1 otherwise.
565 vcpio_rd(ARCHD *arcn, char *buf)
573 * during the id phase it was determined if we were using CRC, use the
577 if (crc_id(buf, sizeof(HD_VCPIO)) < 0)
580 if (vcpio_id(buf, sizeof(HD_VCPIO)) < 0)
584 hd = (HD_VCPIO *)buf;
588 * extract the hex ascii fields from the header
590 arcn->sb.st_ino = (ino_t)asc_ul(hd->c_ino, sizeof(hd->c_ino), HEX);
591 arcn->sb.st_mode = (mode_t)asc_ul(hd->c_mode, sizeof(hd->c_mode), HEX);
592 arcn->sb.st_uid = (uid_t)asc_ul(hd->c_uid, sizeof(hd->c_uid), HEX);
593 arcn->sb.st_gid = (gid_t)asc_ul(hd->c_gid, sizeof(hd->c_gid), HEX);
594 arcn->sb.st_mtime = (time_t)asc_ul(hd->c_mtime,sizeof(hd->c_mtime),HEX);
595 arcn->sb.st_ctime = arcn->sb.st_atime = arcn->sb.st_mtime;
597 arcn->sb.st_size = (off_t)asc_ul(hd->c_filesize,
598 sizeof(hd->c_filesize), HEX);
600 arcn->sb.st_size = (off_t)asc_uqd(hd->c_filesize,
601 sizeof(hd->c_filesize), HEX);
603 arcn->sb.st_nlink = (nlink_t)asc_ul(hd->c_nlink, sizeof(hd->c_nlink),
605 devmajor = (dev_t)asc_ul(hd->c_maj, sizeof(hd->c_maj), HEX);
606 devminor = (dev_t)asc_ul(hd->c_min, sizeof(hd->c_min), HEX);
607 arcn->sb.st_dev = TODEV(devmajor, devminor);
608 devmajor = (dev_t)asc_ul(hd->c_rmaj, sizeof(hd->c_maj), HEX);
609 devminor = (dev_t)asc_ul(hd->c_rmin, sizeof(hd->c_min), HEX);
610 arcn->sb.st_rdev = TODEV(devmajor, devminor);
611 arcn->crc = asc_ul(hd->c_chksum, sizeof(hd->c_chksum), HEX);
614 * check the length of the file name, if ok read it in, return -1 if
617 if ((nsz = (int)asc_ul(hd->c_namesize,sizeof(hd->c_namesize),HEX)) < 2)
619 arcn->nlen = nsz - 1;
620 if (rd_nm(arcn, nsz) < 0)
624 * skip padding. header + filename is aligned to 4 byte boundaries
626 if (rd_skip((off_t)(VCPIO_PAD(sizeof(HD_VCPIO) + nsz))) < 0)
630 * if not a link (or a file with no data), calculate pad size (for
631 * padding which follows the file data), clear the link name and return
633 if (((arcn->sb.st_mode&C_IFMT) != C_ISLNK)||(arcn->sb.st_size == 0)) {
635 * we have a valid header (not a link)
638 arcn->ln_name[0] = '\0';
639 arcn->pad = VCPIO_PAD(arcn->sb.st_size);
640 return(com_rd(arcn));
644 * read in the link name and skip over the padding
646 if ((rd_ln_nm(arcn) < 0) ||
647 (rd_skip((off_t)(VCPIO_PAD(arcn->sb.st_size))) < 0))
651 * we have a valid header (with a link)
653 return(com_rd(arcn));
658 * no cleanup needed here, just return size of the trailer (for append)
660 * size of trailer header in this format
666 return((off_t)(sizeof(HD_VCPIO) + sizeof(TRAILER) +
667 (VCPIO_PAD(sizeof(HD_VCPIO) + sizeof(TRAILER)))));
672 * start up the device mapping table, enable crc file calculation
674 * 0 if ok, -1 otherwise (what dev_start() returns)
686 * copy the data in the ARCHD to buffer in system VR4 cpio
687 * (with/without crc) format.
689 * 0 if file has data to be written after the header, 1 if file has
690 * NO data to write after the header, -1 if archive write failed
694 vcpio_wr(ARCHD *arcn)
698 char hdblk[sizeof(HD_VCPIO)];
701 * check and repair truncated device and inode fields in the cpio
704 if (map_dev(arcn, (u_long)VCPIO_MASK, (u_long)VCPIO_MASK) < 0)
706 nsz = arcn->nlen + 1;
707 hd = (HD_VCPIO *)hdblk;
708 if ((arcn->type != PAX_BLK) && (arcn->type != PAX_CHR))
709 arcn->sb.st_rdev = 0;
712 * add the proper magic value depending whether we were asked for
713 * file data crc's, and the crc if needed.
716 if (ul_asc((u_long)VCMAGIC, hd->c_magic, sizeof(hd->c_magic),
718 ul_asc((u_long)arcn->crc,hd->c_chksum,sizeof(hd->c_chksum),
722 if (ul_asc((u_long)VMAGIC, hd->c_magic, sizeof(hd->c_magic),
724 ul_asc((u_long)0L, hd->c_chksum, sizeof(hd->c_chksum),HEX))
728 switch (arcn->type) {
733 * caller will copy file data to the archive. tell him how
736 arcn->pad = VCPIO_PAD(arcn->sb.st_size);
738 if (ul_asc((u_long)arcn->sb.st_size, hd->c_filesize,
739 sizeof(hd->c_filesize), HEX)) {
741 if (uqd_asc((u_quad_t)arcn->sb.st_size, hd->c_filesize,
742 sizeof(hd->c_filesize), HEX)) {
744 paxwarn(1,"File is too large for sv4cpio format %s",
751 * no file data for the caller to process, the file data has
752 * the size of the link
755 if (ul_asc((u_long)arcn->ln_nlen, hd->c_filesize,
756 sizeof(hd->c_filesize), HEX))
761 * no file data for the caller to process
764 if (ul_asc((u_long)0L, hd->c_filesize, sizeof(hd->c_filesize),
771 * set the other fields in the header
773 if (ul_asc((u_long)arcn->sb.st_ino, hd->c_ino, sizeof(hd->c_ino),
775 ul_asc((u_long)arcn->sb.st_mode, hd->c_mode, sizeof(hd->c_mode),
777 ul_asc((u_long)arcn->sb.st_uid, hd->c_uid, sizeof(hd->c_uid),
779 ul_asc((u_long)arcn->sb.st_gid, hd->c_gid, sizeof(hd->c_gid),
781 ul_asc((u_long)arcn->sb.st_mtime, hd->c_mtime, sizeof(hd->c_mtime),
783 ul_asc((u_long)arcn->sb.st_nlink, hd->c_nlink, sizeof(hd->c_nlink),
785 ul_asc((u_long)MAJOR(arcn->sb.st_dev),hd->c_maj, sizeof(hd->c_maj),
787 ul_asc((u_long)MINOR(arcn->sb.st_dev),hd->c_min, sizeof(hd->c_min),
789 ul_asc((u_long)MAJOR(arcn->sb.st_rdev),hd->c_rmaj,sizeof(hd->c_maj),
791 ul_asc((u_long)MINOR(arcn->sb.st_rdev),hd->c_rmin,sizeof(hd->c_min),
793 ul_asc((u_long)nsz, hd->c_namesize, sizeof(hd->c_namesize), HEX))
797 * write the header, the file name and padding as required.
799 if ((wr_rdbuf(hdblk, (int)sizeof(HD_VCPIO)) < 0) ||
800 (wr_rdbuf(arcn->name, (int)nsz) < 0) ||
801 (wr_skip((off_t)(VCPIO_PAD(sizeof(HD_VCPIO) + nsz))) < 0)) {
802 paxwarn(1,"Could not write sv4cpio header for %s",arcn->org_name);
807 * if we have file data, tell the caller we are done, copy the file
809 if ((arcn->type == PAX_CTG) || (arcn->type == PAX_REG) ||
810 (arcn->type == PAX_HRG))
814 * if we are not a link, tell the caller we are done, go to next file
816 if (arcn->type != PAX_SLK)
820 * write the link name, tell the caller we are done.
822 if ((wr_rdbuf(arcn->ln_name, arcn->ln_nlen) < 0) ||
823 (wr_skip((off_t)(VCPIO_PAD(arcn->ln_nlen))) < 0)) {
824 paxwarn(1,"Could not write sv4cpio link name for %s",
832 * header field is out of range
834 paxwarn(1,"Sv4cpio header field is too small for file %s",arcn->org_name);
839 * Routines common to the old binary header cpio
844 * determine if a block given to us is a old binary cpio header
845 * (with/without header byte swapping)
847 * 0 if a valid header, -1 otherwise
851 bcpio_id(char *blk, int size)
853 if (size < sizeof(HD_BCPIO))
857 * check both normal and byte swapped magic cookies
859 if (((u_short)SHRT_EXT(blk)) == MAGIC)
861 if (((u_short)RSHRT_EXT(blk)) == MAGIC) {
871 * determine if a buffer is a old binary archive entry. (it may have byte
872 * swapped header) convert and store the values in the ARCHD parameter.
873 * This is a very old header format and should not really be used.
875 * 0 if a valid header, -1 otherwise.
879 bcpio_rd(ARCHD *arcn, char *buf)
887 if (bcpio_id(buf, sizeof(HD_BCPIO)) < 0)
891 hd = (HD_BCPIO *)buf;
894 * header has swapped bytes on 16 bit boundaries
896 arcn->sb.st_dev = (dev_t)(RSHRT_EXT(hd->h_dev));
897 arcn->sb.st_ino = (ino_t)(RSHRT_EXT(hd->h_ino));
898 arcn->sb.st_mode = (mode_t)(RSHRT_EXT(hd->h_mode));
899 arcn->sb.st_uid = (uid_t)(RSHRT_EXT(hd->h_uid));
900 arcn->sb.st_gid = (gid_t)(RSHRT_EXT(hd->h_gid));
901 arcn->sb.st_nlink = (nlink_t)(RSHRT_EXT(hd->h_nlink));
902 arcn->sb.st_rdev = (dev_t)(RSHRT_EXT(hd->h_rdev));
903 arcn->sb.st_mtime = (time_t)(RSHRT_EXT(hd->h_mtime_1));
904 arcn->sb.st_mtime = (arcn->sb.st_mtime << 16) |
905 ((time_t)(RSHRT_EXT(hd->h_mtime_2)));
906 arcn->sb.st_size = (off_t)(RSHRT_EXT(hd->h_filesize_1));
907 arcn->sb.st_size = (arcn->sb.st_size << 16) |
908 ((off_t)(RSHRT_EXT(hd->h_filesize_2)));
909 nsz = (int)(RSHRT_EXT(hd->h_namesize));
911 arcn->sb.st_dev = (dev_t)(SHRT_EXT(hd->h_dev));
912 arcn->sb.st_ino = (ino_t)(SHRT_EXT(hd->h_ino));
913 arcn->sb.st_mode = (mode_t)(SHRT_EXT(hd->h_mode));
914 arcn->sb.st_uid = (uid_t)(SHRT_EXT(hd->h_uid));
915 arcn->sb.st_gid = (gid_t)(SHRT_EXT(hd->h_gid));
916 arcn->sb.st_nlink = (nlink_t)(SHRT_EXT(hd->h_nlink));
917 arcn->sb.st_rdev = (dev_t)(SHRT_EXT(hd->h_rdev));
918 arcn->sb.st_mtime = (time_t)(SHRT_EXT(hd->h_mtime_1));
919 arcn->sb.st_mtime = (arcn->sb.st_mtime << 16) |
920 ((time_t)(SHRT_EXT(hd->h_mtime_2)));
921 arcn->sb.st_size = (off_t)(SHRT_EXT(hd->h_filesize_1));
922 arcn->sb.st_size = (arcn->sb.st_size << 16) |
923 ((off_t)(SHRT_EXT(hd->h_filesize_2)));
924 nsz = (int)(SHRT_EXT(hd->h_namesize));
926 arcn->sb.st_ctime = arcn->sb.st_atime = arcn->sb.st_mtime;
929 * check the file name size, if bogus give up. otherwise read the file
934 arcn->nlen = nsz - 1;
935 if (rd_nm(arcn, nsz) < 0)
939 * header + file name are aligned to 2 byte boundaries, skip if needed
941 if (rd_skip((off_t)(BCPIO_PAD(sizeof(HD_BCPIO) + nsz))) < 0)
945 * if not a link (or a file with no data), calculate pad size (for
946 * padding which follows the file data), clear the link name and return
948 if (((arcn->sb.st_mode & C_IFMT) != C_ISLNK)||(arcn->sb.st_size == 0)){
950 * we have a valid header (not a link)
953 arcn->ln_name[0] = '\0';
954 arcn->pad = BCPIO_PAD(arcn->sb.st_size);
955 return(com_rd(arcn));
958 if ((rd_ln_nm(arcn) < 0) ||
959 (rd_skip((off_t)(BCPIO_PAD(arcn->sb.st_size))) < 0))
963 * we have a valid header (with a link)
965 return(com_rd(arcn));
970 * no cleanup needed here, just return size of the trailer (for append)
972 * size of trailer header in this format
978 return((off_t)(sizeof(HD_BCPIO) + sizeof(TRAILER) +
979 (BCPIO_PAD(sizeof(HD_BCPIO) + sizeof(TRAILER)))));
984 * copy the data in the ARCHD to buffer in old binary cpio format
985 * There is a real chance of field overflow with this critter. So we
986 * always check the conversion is ok. nobody in their right mind
987 * should write an archive in this format...
989 * 0 if file has data to be written after the header, 1 if file has NO
990 * data to write after the header, -1 if archive write failed
994 bcpio_wr(ARCHD *arcn)
998 char hdblk[sizeof(HD_BCPIO)];
1004 * check and repair truncated device and inode fields in the cpio
1007 if (map_dev(arcn, (u_long)BCPIO_MASK, (u_long)BCPIO_MASK) < 0)
1010 if ((arcn->type != PAX_BLK) && (arcn->type != PAX_CHR))
1011 arcn->sb.st_rdev = 0;
1012 hd = (HD_BCPIO *)hdblk;
1014 switch (arcn->type) {
1019 * caller will copy file data to the archive. tell him how
1022 arcn->pad = BCPIO_PAD(arcn->sb.st_size);
1023 hd->h_filesize_1[0] = CHR_WR_0(arcn->sb.st_size);
1024 hd->h_filesize_1[1] = CHR_WR_1(arcn->sb.st_size);
1025 hd->h_filesize_2[0] = CHR_WR_2(arcn->sb.st_size);
1026 hd->h_filesize_2[1] = CHR_WR_3(arcn->sb.st_size);
1027 t_offt = (off_t)(SHRT_EXT(hd->h_filesize_1));
1028 t_offt = (t_offt<<16) | ((off_t)(SHRT_EXT(hd->h_filesize_2)));
1029 if (arcn->sb.st_size != t_offt) {
1030 paxwarn(1,"File is too large for bcpio format %s",
1037 * no file data for the caller to process, the file data has
1038 * the size of the link
1041 hd->h_filesize_1[0] = CHR_WR_0(arcn->ln_nlen);
1042 hd->h_filesize_1[1] = CHR_WR_1(arcn->ln_nlen);
1043 hd->h_filesize_2[0] = CHR_WR_2(arcn->ln_nlen);
1044 hd->h_filesize_2[1] = CHR_WR_3(arcn->ln_nlen);
1045 t_int = (int)(SHRT_EXT(hd->h_filesize_1));
1046 t_int = (t_int << 16) | ((int)(SHRT_EXT(hd->h_filesize_2)));
1047 if (arcn->ln_nlen != t_int)
1052 * no file data for the caller to process
1055 hd->h_filesize_1[0] = (char)0;
1056 hd->h_filesize_1[1] = (char)0;
1057 hd->h_filesize_2[0] = (char)0;
1058 hd->h_filesize_2[1] = (char)0;
1063 * build up the rest of the fields
1065 hd->h_magic[0] = CHR_WR_2(MAGIC);
1066 hd->h_magic[1] = CHR_WR_3(MAGIC);
1067 hd->h_dev[0] = CHR_WR_2(arcn->sb.st_dev);
1068 hd->h_dev[1] = CHR_WR_3(arcn->sb.st_dev);
1069 if (arcn->sb.st_dev != (dev_t)(SHRT_EXT(hd->h_dev)))
1071 hd->h_ino[0] = CHR_WR_2(arcn->sb.st_ino);
1072 hd->h_ino[1] = CHR_WR_3(arcn->sb.st_ino);
1073 if (arcn->sb.st_ino != (ino_t)(SHRT_EXT(hd->h_ino)))
1075 hd->h_mode[0] = CHR_WR_2(arcn->sb.st_mode);
1076 hd->h_mode[1] = CHR_WR_3(arcn->sb.st_mode);
1077 if (arcn->sb.st_mode != (mode_t)(SHRT_EXT(hd->h_mode)))
1079 hd->h_uid[0] = CHR_WR_2(arcn->sb.st_uid);
1080 hd->h_uid[1] = CHR_WR_3(arcn->sb.st_uid);
1081 if (arcn->sb.st_uid != (uid_t)(SHRT_EXT(hd->h_uid)))
1083 hd->h_gid[0] = CHR_WR_2(arcn->sb.st_gid);
1084 hd->h_gid[1] = CHR_WR_3(arcn->sb.st_gid);
1085 if (arcn->sb.st_gid != (gid_t)(SHRT_EXT(hd->h_gid)))
1087 hd->h_nlink[0] = CHR_WR_2(arcn->sb.st_nlink);
1088 hd->h_nlink[1] = CHR_WR_3(arcn->sb.st_nlink);
1089 if (arcn->sb.st_nlink != (nlink_t)(SHRT_EXT(hd->h_nlink)))
1091 hd->h_rdev[0] = CHR_WR_2(arcn->sb.st_rdev);
1092 hd->h_rdev[1] = CHR_WR_3(arcn->sb.st_rdev);
1093 if (arcn->sb.st_rdev != (dev_t)(SHRT_EXT(hd->h_rdev)))
1095 hd->h_mtime_1[0] = CHR_WR_0(arcn->sb.st_mtime);
1096 hd->h_mtime_1[1] = CHR_WR_1(arcn->sb.st_mtime);
1097 hd->h_mtime_2[0] = CHR_WR_2(arcn->sb.st_mtime);
1098 hd->h_mtime_2[1] = CHR_WR_3(arcn->sb.st_mtime);
1099 t_timet = (time_t)(SHRT_EXT(hd->h_mtime_1));
1100 t_timet = (t_timet << 16) | ((time_t)(SHRT_EXT(hd->h_mtime_2)));
1101 if (arcn->sb.st_mtime != t_timet)
1103 nsz = arcn->nlen + 1;
1104 hd->h_namesize[0] = CHR_WR_2(nsz);
1105 hd->h_namesize[1] = CHR_WR_3(nsz);
1106 if (nsz != (int)(SHRT_EXT(hd->h_namesize)))
1110 * write the header, the file name and padding as required.
1112 if ((wr_rdbuf(hdblk, (int)sizeof(HD_BCPIO)) < 0) ||
1113 (wr_rdbuf(arcn->name, nsz) < 0) ||
1114 (wr_skip((off_t)(BCPIO_PAD(sizeof(HD_BCPIO) + nsz))) < 0)) {
1115 paxwarn(1, "Could not write bcpio header for %s", arcn->org_name);
1120 * if we have file data, tell the caller we are done
1122 if ((arcn->type == PAX_CTG) || (arcn->type == PAX_REG) ||
1123 (arcn->type == PAX_HRG))
1127 * if we are not a link, tell the caller we are done, go to next file
1129 if (arcn->type != PAX_SLK)
1133 * write the link name, tell the caller we are done.
1135 if ((wr_rdbuf(arcn->ln_name, arcn->ln_nlen) < 0) ||
1136 (wr_skip((off_t)(BCPIO_PAD(arcn->ln_nlen))) < 0)) {
1137 paxwarn(1,"Could not write bcpio link name for %s",arcn->org_name);
1144 * header field is out of range
1146 paxwarn(1,"Bcpio header field is too small for file %s", arcn->org_name);