2 * Copyright (c) 1992 Keith Muller.
3 * Copyright (c) 1992, 1993
4 * The Regents of the University of California. All rights reserved.
6 * This code is derived from software contributed to Berkeley by
7 * Keith Muller of the University of California, San Diego.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed by the University of
20 * California, Berkeley and its contributors.
21 * 4. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * @(#)cpio.c 8.1 (Berkeley) 5/31/93
38 * $FreeBSD: src/bin/pax/cpio.c,v 1.12.2.1 2001/08/01 05:03:11 obrien Exp $
39 * $DragonFly: src/bin/pax/cpio.c,v 1.6 2004/11/07 20:54:51 eirikn Exp $
42 #include <sys/types.h>
53 static int rd_nm (ARCHD *, int);
54 static int rd_ln_nm (ARCHD *);
55 static int com_rd (ARCHD *);
58 * Routines which support the different cpio versions
61 static int swp_head; /* binary cpio header byte swap */
64 * Routines common to all versions of cpio
69 * Fire up the hard link detection code
71 * 0 if ok -1 otherwise (the return values of lnk_start())
82 * Called to determine if a header block is a valid trailer. We are
83 * passed the block, the in_sync flag (which tells us we are in resync
84 * mode; looking for a valid header), and cnt (which starts at zero)
85 * which is used to count the number of empty blocks we have seen so far.
87 * 0 if a valid trailer, -1 if not a valid trailer,
91 cpio_trail(ARCHD *arcn)
94 * look for trailer id in file we are about to process
96 if ((strcmp(arcn->name, TRAILER) == 0) && (arcn->sb.st_size == 0))
103 * operations common to all cpio read functions.
113 arcn->org_name = arcn->name;
114 switch(arcn->sb.st_mode & C_IFMT) {
116 arcn->type = PAX_FIF;
119 arcn->type = PAX_DIR;
122 arcn->type = PAX_BLK;
125 arcn->type = PAX_CHR;
128 arcn->type = PAX_SLK;
131 arcn->type = PAX_SCK;
137 * we have file data, set up skip (pad is set in the format
140 arcn->sb.st_mode = (arcn->sb.st_mode & 0xfff) | C_ISREG;
141 arcn->type = PAX_REG;
142 arcn->skip = arcn->sb.st_size;
145 if (chk_lnk(arcn) < 0)
152 * write the special file with the name trailer in the proper format
154 * result of the write of the trailer from the cpio specific write func
163 * create a trailer request and call the proper format write function
165 memset(&last, 0, sizeof(last));
166 last.nlen = sizeof(TRAILER) - 1;
168 last.sb.st_nlink = 1;
169 strcpy(last.name, TRAILER);
170 return((*frmt->wr)(&last));
175 * read in the file name which follows the cpio header
177 * 0 if ok, -1 otherwise
181 rd_nm(ARCHD *arcn, int nsz)
184 * do not even try bogus values
186 if ((nsz == 0) || (nsz > sizeof(arcn->name))) {
187 paxwarn(1, "Cpio file name length %d is out of range", nsz);
192 * read the name and make sure it is not empty and is \0 terminated
194 if ((rd_wrbuf(arcn->name,nsz) != nsz) || (arcn->name[nsz-1] != '\0') ||
195 (arcn->name[0] == '\0')) {
196 paxwarn(1, "Cpio file name in header is corrupted");
204 * read in the link name for a file with links. The link name is stored
205 * like file data (and is NOT \0 terminated!)
207 * 0 if ok, -1 otherwise
211 rd_ln_nm(ARCHD *arcn)
214 * check the length specified for bogus values
216 if ((arcn->sb.st_size == 0) ||
217 (arcn->sb.st_size >= sizeof(arcn->ln_name))) {
219 paxwarn(1, "Cpio link name length is invalid: %lu",
222 paxwarn(1, "Cpio link name length is invalid: %qu",
229 * read in the link name and \0 terminate it
231 if (rd_wrbuf(arcn->ln_name, (int)arcn->sb.st_size) !=
232 (int)arcn->sb.st_size) {
233 paxwarn(1, "Cpio link name read error");
236 arcn->ln_nlen = arcn->sb.st_size;
237 arcn->ln_name[arcn->ln_nlen] = '\0';
240 * watch out for those empty link names
242 if (arcn->ln_name[0] == '\0') {
243 paxwarn(1, "Cpio link name is corrupt");
250 * Routines common to the extended byte oriented cpio format
255 * determine if a block given to us is a valid extended byte oriented
258 * 0 if a valid header, -1 otherwise
262 cpio_id(char *blk, int size)
264 if ((size < sizeof(HD_CPIO)) ||
265 (strncmp(blk, AMAGIC, sizeof(AMAGIC) - 1) != 0))
272 * determine if a buffer is a byte oriented extended cpio archive entry.
273 * convert and store the values in the ARCHD parameter.
275 * 0 if a valid header, -1 otherwise.
279 cpio_rd(ARCHD *arcn, char *buf)
285 * check that this is a valid header, if not return -1
287 if (cpio_id(buf, sizeof(HD_CPIO)) < 0)
292 * byte oriented cpio (posix) does not have padding! extract the octal
293 * ascii fields from the header
296 arcn->sb.st_dev = (dev_t)asc_ul(hd->c_dev, sizeof(hd->c_dev), OCT);
297 arcn->sb.st_ino = (ino_t)asc_ul(hd->c_ino, sizeof(hd->c_ino), OCT);
298 arcn->sb.st_mode = (mode_t)asc_ul(hd->c_mode, sizeof(hd->c_mode), OCT);
299 arcn->sb.st_uid = (uid_t)asc_ul(hd->c_uid, sizeof(hd->c_uid), OCT);
300 arcn->sb.st_gid = (gid_t)asc_ul(hd->c_gid, sizeof(hd->c_gid), OCT);
301 arcn->sb.st_nlink = (nlink_t)asc_ul(hd->c_nlink, sizeof(hd->c_nlink),
303 arcn->sb.st_rdev = (dev_t)asc_ul(hd->c_rdev, sizeof(hd->c_rdev), OCT);
304 arcn->sb.st_mtime = (time_t)asc_ul(hd->c_mtime, sizeof(hd->c_mtime),
306 arcn->sb.st_ctime = arcn->sb.st_atime = arcn->sb.st_mtime;
308 arcn->sb.st_size = (off_t)asc_ul(hd->c_filesize,sizeof(hd->c_filesize),
311 arcn->sb.st_size = (off_t)asc_uqd(hd->c_filesize,sizeof(hd->c_filesize),
316 * check name size and if valid, read in the name of this entry (name
317 * follows header in the archive)
319 if ((nsz = (int)asc_ul(hd->c_namesize,sizeof(hd->c_namesize),OCT)) < 2)
321 arcn->nlen = nsz - 1;
322 if (rd_nm(arcn, nsz) < 0)
325 if (((arcn->sb.st_mode&C_IFMT) != C_ISLNK)||(arcn->sb.st_size == 0)) {
327 * no link name to read for this file
330 arcn->ln_name[0] = '\0';
331 return(com_rd(arcn));
335 * check link name size and read in the link name. Link names are
336 * stored like file data.
338 if (rd_ln_nm(arcn) < 0)
342 * we have a valid header (with a link)
344 return(com_rd(arcn));
349 * no cleanup needed here, just return size of the trailer (for append)
351 * size of trailer header in this format
357 return((off_t)(sizeof(HD_CPIO) + sizeof(TRAILER)));
362 * start up the device mapping table
364 * 0 if ok, -1 otherwise (what dev_start() returns)
375 * copy the data in the ARCHD to buffer in extended byte oriented cpio
378 * 0 if file has data to be written after the header, 1 if file has NO
379 * data to write after the header, -1 if archive write failed
387 char hdblk[sizeof(HD_CPIO)];
390 * check and repair truncated device and inode fields in the header
392 if (map_dev(arcn, (u_long)CPIO_MASK, (u_long)CPIO_MASK) < 0)
396 nsz = arcn->nlen + 1;
397 hd = (HD_CPIO *)hdblk;
398 if ((arcn->type != PAX_BLK) && (arcn->type != PAX_CHR))
399 arcn->sb.st_rdev = 0;
406 * set data size for file data
409 if (ul_asc((u_long)arcn->sb.st_size, hd->c_filesize,
410 sizeof(hd->c_filesize), OCT)) {
412 if (uqd_asc((u_quad_t)arcn->sb.st_size, hd->c_filesize,
413 sizeof(hd->c_filesize), OCT)) {
415 paxwarn(1,"File is too large for cpio format %s",
422 * set data size to hold link name
424 if (ul_asc((u_long)arcn->ln_nlen, hd->c_filesize,
425 sizeof(hd->c_filesize), OCT))
430 * all other file types have no file data
432 if (ul_asc((u_long)0, hd->c_filesize, sizeof(hd->c_filesize),
439 * copy the values to the header using octal ascii
441 if (ul_asc((u_long)MAGIC, hd->c_magic, sizeof(hd->c_magic), OCT) ||
442 ul_asc((u_long)arcn->sb.st_dev, hd->c_dev, sizeof(hd->c_dev),
444 ul_asc((u_long)arcn->sb.st_ino, hd->c_ino, sizeof(hd->c_ino),
446 ul_asc((u_long)arcn->sb.st_mode, hd->c_mode, sizeof(hd->c_mode),
448 ul_asc((u_long)arcn->sb.st_uid, hd->c_uid, sizeof(hd->c_uid),
450 ul_asc((u_long)arcn->sb.st_gid, hd->c_gid, sizeof(hd->c_gid),
452 ul_asc((u_long)arcn->sb.st_nlink, hd->c_nlink, sizeof(hd->c_nlink),
454 ul_asc((u_long)arcn->sb.st_rdev, hd->c_rdev, sizeof(hd->c_rdev),
456 ul_asc((u_long)arcn->sb.st_mtime,hd->c_mtime,sizeof(hd->c_mtime),
458 ul_asc((u_long)nsz, hd->c_namesize, sizeof(hd->c_namesize), OCT))
462 * write the file name to the archive
464 if ((wr_rdbuf(hdblk, (int)sizeof(HD_CPIO)) < 0) ||
465 (wr_rdbuf(arcn->name, nsz) < 0)) {
466 paxwarn(1, "Unable to write cpio header for %s", arcn->org_name);
471 * if this file has data, we are done. The caller will write the file
472 * data, if we are link tell caller we are done, go to next file
474 if ((arcn->type == PAX_CTG) || (arcn->type == PAX_REG) ||
475 (arcn->type == PAX_HRG))
477 if (arcn->type != PAX_SLK)
481 * write the link name to the archive, tell the caller to go to the
482 * next file as we are done.
484 if (wr_rdbuf(arcn->ln_name, arcn->ln_nlen) < 0) {
485 paxwarn(1,"Unable to write cpio link name for %s",arcn->org_name);
492 * header field is out of range
494 paxwarn(1, "Cpio header field is too small to store file %s",
500 * Routines common to the system VR4 version of cpio (with/without file CRC)
505 * determine if a block given to us is a valid system VR4 cpio header
506 * WITHOUT crc. WATCH it the magic cookies are in OCTAL, the header
509 * 0 if a valid header, -1 otherwise
513 vcpio_id(char *blk, int size)
515 if ((size < sizeof(HD_VCPIO)) ||
516 (strncmp(blk, AVMAGIC, sizeof(AVMAGIC) - 1) != 0))
523 * determine if a block given to us is a valid system VR4 cpio header
524 * WITH crc. WATCH it the magic cookies are in OCTAL the header uses HEX
526 * 0 if a valid header, -1 otherwise
530 crc_id(char *blk, int size)
532 if ((size < sizeof(HD_VCPIO)) ||
533 (strncmp(blk, AVCMAGIC, sizeof(AVCMAGIC) - 1) != 0))
540 w set file data CRC calculations. Fire up the hard link detection code
542 * 0 if ok -1 otherwise (the return values of lnk_start())
554 * determine if a buffer is a system VR4 archive entry. (with/without CRC)
555 * convert and store the values in the ARCHD parameter.
557 * 0 if a valid header, -1 otherwise.
561 vcpio_rd(ARCHD *arcn, char *buf)
569 * during the id phase it was determined if we were using CRC, use the
573 if (crc_id(buf, sizeof(HD_VCPIO)) < 0)
576 if (vcpio_id(buf, sizeof(HD_VCPIO)) < 0)
580 hd = (HD_VCPIO *)buf;
584 * extract the hex ascii fields from the header
586 arcn->sb.st_ino = (ino_t)asc_ul(hd->c_ino, sizeof(hd->c_ino), HEX);
587 arcn->sb.st_mode = (mode_t)asc_ul(hd->c_mode, sizeof(hd->c_mode), HEX);
588 arcn->sb.st_uid = (uid_t)asc_ul(hd->c_uid, sizeof(hd->c_uid), HEX);
589 arcn->sb.st_gid = (gid_t)asc_ul(hd->c_gid, sizeof(hd->c_gid), HEX);
590 arcn->sb.st_mtime = (time_t)asc_ul(hd->c_mtime,sizeof(hd->c_mtime),HEX);
591 arcn->sb.st_ctime = arcn->sb.st_atime = arcn->sb.st_mtime;
593 arcn->sb.st_size = (off_t)asc_ul(hd->c_filesize,
594 sizeof(hd->c_filesize), HEX);
596 arcn->sb.st_size = (off_t)asc_uqd(hd->c_filesize,
597 sizeof(hd->c_filesize), HEX);
599 arcn->sb.st_nlink = (nlink_t)asc_ul(hd->c_nlink, sizeof(hd->c_nlink),
601 devmajor = (dev_t)asc_ul(hd->c_maj, sizeof(hd->c_maj), HEX);
602 devminor = (dev_t)asc_ul(hd->c_min, sizeof(hd->c_min), HEX);
603 arcn->sb.st_dev = TODEV(devmajor, devminor);
604 devmajor = (dev_t)asc_ul(hd->c_rmaj, sizeof(hd->c_maj), HEX);
605 devminor = (dev_t)asc_ul(hd->c_rmin, sizeof(hd->c_min), HEX);
606 arcn->sb.st_rdev = TODEV(devmajor, devminor);
607 arcn->crc = asc_ul(hd->c_chksum, sizeof(hd->c_chksum), HEX);
610 * check the length of the file name, if ok read it in, return -1 if
613 if ((nsz = (int)asc_ul(hd->c_namesize,sizeof(hd->c_namesize),HEX)) < 2)
615 arcn->nlen = nsz - 1;
616 if (rd_nm(arcn, nsz) < 0)
620 * skip padding. header + filename is aligned to 4 byte boundries
622 if (rd_skip((off_t)(VCPIO_PAD(sizeof(HD_VCPIO) + nsz))) < 0)
626 * if not a link (or a file with no data), calculate pad size (for
627 * padding which follows the file data), clear the link name and return
629 if (((arcn->sb.st_mode&C_IFMT) != C_ISLNK)||(arcn->sb.st_size == 0)) {
631 * we have a valid header (not a link)
634 arcn->ln_name[0] = '\0';
635 arcn->pad = VCPIO_PAD(arcn->sb.st_size);
636 return(com_rd(arcn));
640 * read in the link name and skip over the padding
642 if ((rd_ln_nm(arcn) < 0) ||
643 (rd_skip((off_t)(VCPIO_PAD(arcn->sb.st_size))) < 0))
647 * we have a valid header (with a link)
649 return(com_rd(arcn));
654 * no cleanup needed here, just return size of the trailer (for append)
656 * size of trailer header in this format
662 return((off_t)(sizeof(HD_VCPIO) + sizeof(TRAILER) +
663 (VCPIO_PAD(sizeof(HD_VCPIO) + sizeof(TRAILER)))));
668 * start up the device mapping table, enable crc file calculation
670 * 0 if ok, -1 otherwise (what dev_start() returns)
682 * copy the data in the ARCHD to buffer in system VR4 cpio
683 * (with/without crc) format.
685 * 0 if file has data to be written after the header, 1 if file has
686 * NO data to write after the header, -1 if archive write failed
690 vcpio_wr(ARCHD *arcn)
694 char hdblk[sizeof(HD_VCPIO)];
697 * check and repair truncated device and inode fields in the cpio
700 if (map_dev(arcn, (u_long)VCPIO_MASK, (u_long)VCPIO_MASK) < 0)
702 nsz = arcn->nlen + 1;
703 hd = (HD_VCPIO *)hdblk;
704 if ((arcn->type != PAX_BLK) && (arcn->type != PAX_CHR))
705 arcn->sb.st_rdev = 0;
708 * add the proper magic value depending whether we were asked for
709 * file data crc's, and the crc if needed.
712 if (ul_asc((u_long)VCMAGIC, hd->c_magic, sizeof(hd->c_magic),
714 ul_asc((u_long)arcn->crc,hd->c_chksum,sizeof(hd->c_chksum),
718 if (ul_asc((u_long)VMAGIC, hd->c_magic, sizeof(hd->c_magic),
720 ul_asc((u_long)0L, hd->c_chksum, sizeof(hd->c_chksum),HEX))
729 * caller will copy file data to the archive. tell him how
732 arcn->pad = VCPIO_PAD(arcn->sb.st_size);
734 if (ul_asc((u_long)arcn->sb.st_size, hd->c_filesize,
735 sizeof(hd->c_filesize), HEX)) {
737 if (uqd_asc((u_quad_t)arcn->sb.st_size, hd->c_filesize,
738 sizeof(hd->c_filesize), HEX)) {
740 paxwarn(1,"File is too large for sv4cpio format %s",
747 * no file data for the caller to process, the file data has
748 * the size of the link
751 if (ul_asc((u_long)arcn->ln_nlen, hd->c_filesize,
752 sizeof(hd->c_filesize), HEX))
757 * no file data for the caller to process
760 if (ul_asc((u_long)0L, hd->c_filesize, sizeof(hd->c_filesize),
767 * set the other fields in the header
769 if (ul_asc((u_long)arcn->sb.st_ino, hd->c_ino, sizeof(hd->c_ino),
771 ul_asc((u_long)arcn->sb.st_mode, hd->c_mode, sizeof(hd->c_mode),
773 ul_asc((u_long)arcn->sb.st_uid, hd->c_uid, sizeof(hd->c_uid),
775 ul_asc((u_long)arcn->sb.st_gid, hd->c_gid, sizeof(hd->c_gid),
777 ul_asc((u_long)arcn->sb.st_mtime, hd->c_mtime, sizeof(hd->c_mtime),
779 ul_asc((u_long)arcn->sb.st_nlink, hd->c_nlink, sizeof(hd->c_nlink),
781 ul_asc((u_long)MAJOR(arcn->sb.st_dev),hd->c_maj, sizeof(hd->c_maj),
783 ul_asc((u_long)MINOR(arcn->sb.st_dev),hd->c_min, sizeof(hd->c_min),
785 ul_asc((u_long)MAJOR(arcn->sb.st_rdev),hd->c_rmaj,sizeof(hd->c_maj),
787 ul_asc((u_long)MINOR(arcn->sb.st_rdev),hd->c_rmin,sizeof(hd->c_min),
789 ul_asc((u_long)nsz, hd->c_namesize, sizeof(hd->c_namesize), HEX))
793 * write the header, the file name and padding as required.
795 if ((wr_rdbuf(hdblk, (int)sizeof(HD_VCPIO)) < 0) ||
796 (wr_rdbuf(arcn->name, (int)nsz) < 0) ||
797 (wr_skip((off_t)(VCPIO_PAD(sizeof(HD_VCPIO) + nsz))) < 0)) {
798 paxwarn(1,"Could not write sv4cpio header for %s",arcn->org_name);
803 * if we have file data, tell the caller we are done, copy the file
805 if ((arcn->type == PAX_CTG) || (arcn->type == PAX_REG) ||
806 (arcn->type == PAX_HRG))
810 * if we are not a link, tell the caller we are done, go to next file
812 if (arcn->type != PAX_SLK)
816 * write the link name, tell the caller we are done.
818 if ((wr_rdbuf(arcn->ln_name, arcn->ln_nlen) < 0) ||
819 (wr_skip((off_t)(VCPIO_PAD(arcn->ln_nlen))) < 0)) {
820 paxwarn(1,"Could not write sv4cpio link name for %s",
828 * header field is out of range
830 paxwarn(1,"Sv4cpio header field is too small for file %s",arcn->org_name);
835 * Routines common to the old binary header cpio
840 * determine if a block given to us is a old binary cpio header
841 * (with/without header byte swapping)
843 * 0 if a valid header, -1 otherwise
847 bcpio_id(char *blk, int size)
849 if (size < sizeof(HD_BCPIO))
853 * check both normal and byte swapped magic cookies
855 if (((u_short)SHRT_EXT(blk)) == MAGIC)
857 if (((u_short)RSHRT_EXT(blk)) == MAGIC) {
867 * determine if a buffer is a old binary archive entry. (it may have byte
868 * swapped header) convert and store the values in the ARCHD parameter.
869 * This is a very old header format and should not really be used.
871 * 0 if a valid header, -1 otherwise.
875 bcpio_rd(ARCHD *arcn, char *buf)
883 if (bcpio_id(buf, sizeof(HD_BCPIO)) < 0)
887 hd = (HD_BCPIO *)buf;
890 * header has swapped bytes on 16 bit boundaries
892 arcn->sb.st_dev = (dev_t)(RSHRT_EXT(hd->h_dev));
893 arcn->sb.st_ino = (ino_t)(RSHRT_EXT(hd->h_ino));
894 arcn->sb.st_mode = (mode_t)(RSHRT_EXT(hd->h_mode));
895 arcn->sb.st_uid = (uid_t)(RSHRT_EXT(hd->h_uid));
896 arcn->sb.st_gid = (gid_t)(RSHRT_EXT(hd->h_gid));
897 arcn->sb.st_nlink = (nlink_t)(RSHRT_EXT(hd->h_nlink));
898 arcn->sb.st_rdev = (dev_t)(RSHRT_EXT(hd->h_rdev));
899 arcn->sb.st_mtime = (time_t)(RSHRT_EXT(hd->h_mtime_1));
900 arcn->sb.st_mtime = (arcn->sb.st_mtime << 16) |
901 ((time_t)(RSHRT_EXT(hd->h_mtime_2)));
902 arcn->sb.st_size = (off_t)(RSHRT_EXT(hd->h_filesize_1));
903 arcn->sb.st_size = (arcn->sb.st_size << 16) |
904 ((off_t)(RSHRT_EXT(hd->h_filesize_2)));
905 nsz = (int)(RSHRT_EXT(hd->h_namesize));
907 arcn->sb.st_dev = (dev_t)(SHRT_EXT(hd->h_dev));
908 arcn->sb.st_ino = (ino_t)(SHRT_EXT(hd->h_ino));
909 arcn->sb.st_mode = (mode_t)(SHRT_EXT(hd->h_mode));
910 arcn->sb.st_uid = (uid_t)(SHRT_EXT(hd->h_uid));
911 arcn->sb.st_gid = (gid_t)(SHRT_EXT(hd->h_gid));
912 arcn->sb.st_nlink = (nlink_t)(SHRT_EXT(hd->h_nlink));
913 arcn->sb.st_rdev = (dev_t)(SHRT_EXT(hd->h_rdev));
914 arcn->sb.st_mtime = (time_t)(SHRT_EXT(hd->h_mtime_1));
915 arcn->sb.st_mtime = (arcn->sb.st_mtime << 16) |
916 ((time_t)(SHRT_EXT(hd->h_mtime_2)));
917 arcn->sb.st_size = (off_t)(SHRT_EXT(hd->h_filesize_1));
918 arcn->sb.st_size = (arcn->sb.st_size << 16) |
919 ((off_t)(SHRT_EXT(hd->h_filesize_2)));
920 nsz = (int)(SHRT_EXT(hd->h_namesize));
922 arcn->sb.st_ctime = arcn->sb.st_atime = arcn->sb.st_mtime;
925 * check the file name size, if bogus give up. otherwise read the file
930 arcn->nlen = nsz - 1;
931 if (rd_nm(arcn, nsz) < 0)
935 * header + file name are aligned to 2 byte boundries, skip if needed
937 if (rd_skip((off_t)(BCPIO_PAD(sizeof(HD_BCPIO) + nsz))) < 0)
941 * if not a link (or a file with no data), calculate pad size (for
942 * padding which follows the file data), clear the link name and return
944 if (((arcn->sb.st_mode & C_IFMT) != C_ISLNK)||(arcn->sb.st_size == 0)){
946 * we have a valid header (not a link)
949 arcn->ln_name[0] = '\0';
950 arcn->pad = BCPIO_PAD(arcn->sb.st_size);
951 return(com_rd(arcn));
954 if ((rd_ln_nm(arcn) < 0) ||
955 (rd_skip((off_t)(BCPIO_PAD(arcn->sb.st_size))) < 0))
959 * we have a valid header (with a link)
961 return(com_rd(arcn));
966 * no cleanup needed here, just return size of the trailer (for append)
968 * size of trailer header in this format
974 return((off_t)(sizeof(HD_BCPIO) + sizeof(TRAILER) +
975 (BCPIO_PAD(sizeof(HD_BCPIO) + sizeof(TRAILER)))));
980 * copy the data in the ARCHD to buffer in old binary cpio format
981 * There is a real chance of field overflow with this critter. So we
982 * always check the conversion is ok. nobody in his their right mind
983 * should write an achive in this format...
985 * 0 if file has data to be written after the header, 1 if file has NO
986 * data to write after the header, -1 if archive write failed
990 bcpio_wr(ARCHD *arcn)
994 char hdblk[sizeof(HD_BCPIO)];
1000 * check and repair truncated device and inode fields in the cpio
1003 if (map_dev(arcn, (u_long)BCPIO_MASK, (u_long)BCPIO_MASK) < 0)
1006 if ((arcn->type != PAX_BLK) && (arcn->type != PAX_CHR))
1007 arcn->sb.st_rdev = 0;
1008 hd = (HD_BCPIO *)hdblk;
1010 switch(arcn->type) {
1015 * caller will copy file data to the archive. tell him how
1018 arcn->pad = BCPIO_PAD(arcn->sb.st_size);
1019 hd->h_filesize_1[0] = CHR_WR_0(arcn->sb.st_size);
1020 hd->h_filesize_1[1] = CHR_WR_1(arcn->sb.st_size);
1021 hd->h_filesize_2[0] = CHR_WR_2(arcn->sb.st_size);
1022 hd->h_filesize_2[1] = CHR_WR_3(arcn->sb.st_size);
1023 t_offt = (off_t)(SHRT_EXT(hd->h_filesize_1));
1024 t_offt = (t_offt<<16) | ((off_t)(SHRT_EXT(hd->h_filesize_2)));
1025 if (arcn->sb.st_size != t_offt) {
1026 paxwarn(1,"File is too large for bcpio format %s",
1033 * no file data for the caller to process, the file data has
1034 * the size of the link
1037 hd->h_filesize_1[0] = CHR_WR_0(arcn->ln_nlen);
1038 hd->h_filesize_1[1] = CHR_WR_1(arcn->ln_nlen);
1039 hd->h_filesize_2[0] = CHR_WR_2(arcn->ln_nlen);
1040 hd->h_filesize_2[1] = CHR_WR_3(arcn->ln_nlen);
1041 t_int = (int)(SHRT_EXT(hd->h_filesize_1));
1042 t_int = (t_int << 16) | ((int)(SHRT_EXT(hd->h_filesize_2)));
1043 if (arcn->ln_nlen != t_int)
1048 * no file data for the caller to process
1051 hd->h_filesize_1[0] = (char)0;
1052 hd->h_filesize_1[1] = (char)0;
1053 hd->h_filesize_2[0] = (char)0;
1054 hd->h_filesize_2[1] = (char)0;
1059 * build up the rest of the fields
1061 hd->h_magic[0] = CHR_WR_2(MAGIC);
1062 hd->h_magic[1] = CHR_WR_3(MAGIC);
1063 hd->h_dev[0] = CHR_WR_2(arcn->sb.st_dev);
1064 hd->h_dev[1] = CHR_WR_3(arcn->sb.st_dev);
1065 if (arcn->sb.st_dev != (dev_t)(SHRT_EXT(hd->h_dev)))
1067 hd->h_ino[0] = CHR_WR_2(arcn->sb.st_ino);
1068 hd->h_ino[1] = CHR_WR_3(arcn->sb.st_ino);
1069 if (arcn->sb.st_ino != (ino_t)(SHRT_EXT(hd->h_ino)))
1071 hd->h_mode[0] = CHR_WR_2(arcn->sb.st_mode);
1072 hd->h_mode[1] = CHR_WR_3(arcn->sb.st_mode);
1073 if (arcn->sb.st_mode != (mode_t)(SHRT_EXT(hd->h_mode)))
1075 hd->h_uid[0] = CHR_WR_2(arcn->sb.st_uid);
1076 hd->h_uid[1] = CHR_WR_3(arcn->sb.st_uid);
1077 if (arcn->sb.st_uid != (uid_t)(SHRT_EXT(hd->h_uid)))
1079 hd->h_gid[0] = CHR_WR_2(arcn->sb.st_gid);
1080 hd->h_gid[1] = CHR_WR_3(arcn->sb.st_gid);
1081 if (arcn->sb.st_gid != (gid_t)(SHRT_EXT(hd->h_gid)))
1083 hd->h_nlink[0] = CHR_WR_2(arcn->sb.st_nlink);
1084 hd->h_nlink[1] = CHR_WR_3(arcn->sb.st_nlink);
1085 if (arcn->sb.st_nlink != (nlink_t)(SHRT_EXT(hd->h_nlink)))
1087 hd->h_rdev[0] = CHR_WR_2(arcn->sb.st_rdev);
1088 hd->h_rdev[1] = CHR_WR_3(arcn->sb.st_rdev);
1089 if (arcn->sb.st_rdev != (dev_t)(SHRT_EXT(hd->h_rdev)))
1091 hd->h_mtime_1[0] = CHR_WR_0(arcn->sb.st_mtime);
1092 hd->h_mtime_1[1] = CHR_WR_1(arcn->sb.st_mtime);
1093 hd->h_mtime_2[0] = CHR_WR_2(arcn->sb.st_mtime);
1094 hd->h_mtime_2[1] = CHR_WR_3(arcn->sb.st_mtime);
1095 t_timet = (time_t)(SHRT_EXT(hd->h_mtime_1));
1096 t_timet = (t_timet << 16) | ((time_t)(SHRT_EXT(hd->h_mtime_2)));
1097 if (arcn->sb.st_mtime != t_timet)
1099 nsz = arcn->nlen + 1;
1100 hd->h_namesize[0] = CHR_WR_2(nsz);
1101 hd->h_namesize[1] = CHR_WR_3(nsz);
1102 if (nsz != (int)(SHRT_EXT(hd->h_namesize)))
1106 * write the header, the file name and padding as required.
1108 if ((wr_rdbuf(hdblk, (int)sizeof(HD_BCPIO)) < 0) ||
1109 (wr_rdbuf(arcn->name, nsz) < 0) ||
1110 (wr_skip((off_t)(BCPIO_PAD(sizeof(HD_BCPIO) + nsz))) < 0)) {
1111 paxwarn(1, "Could not write bcpio header for %s", arcn->org_name);
1116 * if we have file data, tell the caller we are done
1118 if ((arcn->type == PAX_CTG) || (arcn->type == PAX_REG) ||
1119 (arcn->type == PAX_HRG))
1123 * if we are not a link, tell the caller we are done, go to next file
1125 if (arcn->type != PAX_SLK)
1129 * write the link name, tell the caller we are done.
1131 if ((wr_rdbuf(arcn->ln_name, arcn->ln_nlen) < 0) ||
1132 (wr_skip((off_t)(BCPIO_PAD(arcn->ln_nlen))) < 0)) {
1133 paxwarn(1,"Could not write bcpio link name for %s",arcn->org_name);
1140 * header field is out of range
1142 paxwarn(1,"Bcpio header field is too small for file %s", arcn->org_name);