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 * @(#)tar.c 8.2 (Berkeley) 4/18/94
38 * $FreeBSD: src/bin/pax/tar.c,v 1.13.2.1 2001/08/01 05:03:12 obrien Exp $
39 * $DragonFly: src/bin/pax/tar.c,v 1.3 2003/09/21 04:24:17 drhodus Exp $
42 #include <sys/types.h>
54 * Routines for reading, writing and header identify of various versions of tar
57 static u_long tar_chksm (register char *, register int);
58 static char *name_split (register char *, register int);
59 static int ul_oct (u_long, register char *, register int, int);
61 static int uqd_oct (u_quad_t, register char *, register int, int);
65 * Routines common to all versions of tar
68 static int tar_nodir; /* do not write dirs under old tar */
72 * add the tar trailer of two null blocks
74 * 0 if ok, -1 otherwise (what wr_skip returns)
85 return(wr_skip((off_t)(NULLCNT*BLKMULT)));
90 * no cleanup needed here, just return size of trailer (for append)
92 * size of trailer (2 * BLKMULT)
103 return((off_t)(NULLCNT*BLKMULT));
108 * Called to determine if a header block is a valid trailer. We are passed
109 * the block, the in_sync flag (which tells us we are in resync mode;
110 * looking for a valid header), and cnt (which starts at zero) which is
111 * used to count the number of empty blocks we have seen so far.
113 * 0 if a valid trailer, -1 if not a valid trailer, or 1 if the block
114 * could never contain a header.
119 tar_trail(register char *buf, register int in_resync, register int *cnt)
122 tar_trail(buf, in_resync, cnt)
124 register int in_resync;
131 * look for all zero, trailer is two consecutive blocks of zero
133 for (i = 0; i < BLKMULT; ++i) {
139 * if not all zero it is not a trailer, but MIGHT be a header.
145 * When given a zero block, we must be careful!
146 * If we are not in resync mode, check for the trailer. Have to watch
147 * out that we do not mis-identify file data as the trailer, so we do
148 * NOT try to id a trailer during resync mode. During resync mode we
149 * might as well throw this block out since a valid header can NEVER be
150 * a block of all 0 (we must have a valid file name).
152 if (!in_resync && (++*cnt >= NULLCNT))
159 * convert an unsigned long to an octal string. many oddball field
160 * termination characters are used by the various versions of tar in the
161 * different fields. term selects which kind to use. str is '0' padded
162 * at the front to len. we are unable to use only one format as many old
163 * tar readers are very cranky about this.
165 * 0 if the number fit into the string, -1 otherwise
170 ul_oct(u_long val, register char *str, register int len, int term)
173 ul_oct(val, str, len, term)
183 * term selects the appropriate character(s) for the end of the string
205 * convert and blank pad if there is space
208 *pt-- = '0' + (char)(val & 0x7);
209 if ((val = val >> 3) == (u_long)0)
215 if (val != (u_long)0)
223 * convert an u_quad_t to an octal string. one of many oddball field
224 * termination characters are used by the various versions of tar in the
225 * different fields. term selects which kind to use. str is '0' padded
226 * at the front to len. we are unable to use only one format as many old
227 * tar readers are very cranky about this.
229 * 0 if the number fit into the string, -1 otherwise
234 uqd_oct(u_quad_t val, register char *str, register int len, int term)
237 uqd_oct(val, str, len, term)
247 * term selects the appropriate character(s) for the end of the string
269 * convert and blank pad if there is space
272 *pt-- = '0' + (char)(val & 0x7);
273 if ((val = val >> 3) == 0)
279 if (val != (u_quad_t)0)
287 * calculate the checksum for a tar block counting the checksum field as
288 * all blanks (BLNKSUM is that value pre-calculated, the sum of 8 blanks).
289 * NOTE: we use len to short circuit summing 0's on write since we ALWAYS
290 * pad headers with 0.
292 * unsigned long checksum
297 tar_chksm(register char *blk, register int len)
307 u_long chksm = BLNKSUM; /* initial value is checksum field sum */
310 * add the part of the block before the checksum field
313 stop = blk + CHK_OFFSET;
315 chksm += (u_long)(*pt++ & 0xff);
317 * move past the checksum field and keep going, spec counts the
318 * checksum field as the sum of 8 blanks (which is pre-computed as
320 * ASSUMED: len is greater than CHK_OFFSET. (len is where our 0 padding
321 * starts, no point in summing zero's)
326 chksm += (u_long)(*pt++ & 0xff);
331 * Routines for old BSD style tar (also made portable to sysV tar)
336 * determine if a block given to us is a valid tar header (and not a USTAR
337 * header). We have to be on the lookout for those pesky blocks of all
340 * 0 if a tar header, -1 otherwise
345 tar_id(register char *blk, int size)
354 register HD_USTAR *uhd;
359 uhd = (HD_USTAR *)blk;
362 * check for block of zero's first, a simple and fast test, then make
363 * sure this is not a ustar header by looking for the ustar magic
364 * cookie. We should use TMAGLEN, but some USTAR archive programs are
365 * wrong and create archives missing the \0. Last we check the
366 * checksum. If this is ok we have to assume it is a valid header.
368 if (hd->name[0] == '\0')
370 if (strncmp(uhd->magic, TMAGIC, TMAGLEN - 1) == 0)
372 if (asc_ul(hd->chksum,sizeof(hd->chksum),OCT) != tar_chksm(blk,BLKMULT))
379 * handle tar format specific -o options
381 * 0 if ok -1 otherwise
394 while ((opt = opt_next()) != NULL) {
395 if (strcmp(opt->name, TAR_OPTION) ||
396 strcmp(opt->value, TAR_NODIR)) {
397 paxwarn(1, "Unknown tar format -o option/value pair %s=%s",
398 opt->name, opt->value);
399 paxwarn(1,"%s=%s is the only supported tar format option",
400 TAR_OPTION, TAR_NODIR);
405 * we only support one option, and only when writing
407 if ((act != APPND) && (act != ARCHIVE)) {
408 paxwarn(1, "%s=%s is only supported when writing.",
409 opt->name, opt->value);
420 * extract the values out of block already determined to be a tar header.
421 * store the values in the ARCHD parameter.
428 tar_rd(register ARCHD *arcn, register char *buf)
432 register ARCHD *arcn;
440 * we only get proper sized buffers passed to us
442 if (tar_id(buf, BLKMULT) < 0)
444 arcn->org_name = arcn->name;
445 arcn->sb.st_nlink = 1;
449 * copy out the name and values in the stat buffer
452 arcn->nlen = l_strncpy(arcn->name, hd->name, sizeof(arcn->name) - 1);
453 arcn->name[arcn->nlen] = '\0';
454 arcn->sb.st_mode = (mode_t)(asc_ul(hd->mode,sizeof(hd->mode),OCT) &
456 arcn->sb.st_uid = (uid_t)asc_ul(hd->uid, sizeof(hd->uid), OCT);
457 arcn->sb.st_gid = (gid_t)asc_ul(hd->gid, sizeof(hd->gid), OCT);
459 arcn->sb.st_size = (off_t)asc_ul(hd->size, sizeof(hd->size), OCT);
461 arcn->sb.st_size = (off_t)asc_uqd(hd->size, sizeof(hd->size), OCT);
463 arcn->sb.st_mtime = (time_t)asc_ul(hd->mtime, sizeof(hd->mtime), OCT);
464 arcn->sb.st_ctime = arcn->sb.st_atime = arcn->sb.st_mtime;
467 * have to look at the last character, it may be a '/' and that is used
468 * to encode this as a directory
470 pt = &(arcn->name[arcn->nlen - 1]);
473 switch(hd->linkflag) {
476 * symbolic link, need to get the link name and set the type in
477 * the st_mode so -v printing will look correct.
479 arcn->type = PAX_SLK;
480 arcn->ln_nlen = l_strncpy(arcn->ln_name, hd->linkname,
481 sizeof(arcn->ln_name) - 1);
482 arcn->ln_name[arcn->ln_nlen] = '\0';
483 arcn->sb.st_mode |= S_IFLNK;
487 * hard link, need to get the link name, set the type in the
488 * st_mode and st_nlink so -v printing will look better.
490 arcn->type = PAX_HLK;
491 arcn->sb.st_nlink = 2;
492 arcn->ln_nlen = l_strncpy(arcn->ln_name, hd->linkname,
493 sizeof(arcn->ln_name) - 1);
494 arcn->ln_name[arcn->ln_nlen] = '\0';
497 * no idea of what type this thing really points at, but
498 * we set something for printing only.
500 arcn->sb.st_mode |= S_IFREG;
504 * It is a directory, set the mode for -v printing
506 arcn->type = PAX_DIR;
507 arcn->sb.st_mode |= S_IFDIR;
508 arcn->sb.st_nlink = 2;
509 arcn->ln_name[0] = '\0';
516 * If we have a trailing / this is a directory and NOT a file.
518 arcn->ln_name[0] = '\0';
522 * it is a directory, set the mode for -v printing
524 arcn->type = PAX_DIR;
525 arcn->sb.st_mode |= S_IFDIR;
526 arcn->sb.st_nlink = 2;
529 * have a file that will be followed by data. Set the
530 * skip value to the size field and calculate the size
533 arcn->type = PAX_REG;
534 arcn->sb.st_mode |= S_IFREG;
535 arcn->pad = TAR_PAD(arcn->sb.st_size);
536 arcn->skip = arcn->sb.st_size;
542 * strip off any trailing slash.
553 * write a tar header for the file specified in the ARCHD to the archive.
554 * Have to check for file types that cannot be stored and file names that
555 * are too long. Be careful of the term (last arg) to ul_oct, each field
556 * of tar has it own spec for the termination character(s).
557 * ASSUMED: space after header in header block is zero filled
559 * 0 if file has data to be written after the header, 1 if file has NO
560 * data to write after the header, -1 if archive write failed
565 tar_wr(register ARCHD *arcn)
569 register ARCHD *arcn;
574 char hdblk[sizeof(HD_TAR)];
577 * check for those file system types which tar cannot store
582 * user asked that dirs not be written to the archive
588 paxwarn(1, "Tar cannot archive a character device %s",
592 paxwarn(1, "Tar cannot archive a block device %s", arcn->org_name);
595 paxwarn(1, "Tar cannot archive a socket %s", arcn->org_name);
598 paxwarn(1, "Tar cannot archive a fifo %s", arcn->org_name);
603 if (arcn->ln_nlen > sizeof(hd->linkname)) {
604 paxwarn(1,"Link name too long for tar %s", arcn->ln_name);
615 * check file name len, remember extra char for dirs (the / at the end)
618 if (arcn->type == PAX_DIR)
620 if (len >= sizeof(hd->name)) {
621 paxwarn(1, "File name too long for tar %s", arcn->name);
626 * copy the data out of the ARCHD into the tar header based on the type
627 * of the file. Remember many tar readers want the unused fields to be
628 * padded with zero. We set the linkflag field (type), the linkname
629 * (or zero if not used),the size, and set the padding (if any) to be
630 * added after the file data (0 for all other types, as they only have
633 hd = (HD_TAR *)hdblk;
634 l_strncpy(hd->name, arcn->name, sizeof(hd->name) - 1);
635 hd->name[sizeof(hd->name) - 1] = '\0';
638 if (arcn->type == PAX_DIR) {
640 * directories are the same as files, except have a filename
641 * that ends with a /, we add the slash here. No data follows,
644 hd->linkflag = AREGTYPE;
645 memset(hd->linkname, 0, sizeof(hd->linkname));
646 hd->name[len-1] = '/';
647 if (ul_oct((u_long)0L, hd->size, sizeof(hd->size), 1))
649 } else if (arcn->type == PAX_SLK) {
651 * no data follows this file, so no pad
653 hd->linkflag = SYMTYPE;
654 l_strncpy(hd->linkname,arcn->ln_name, sizeof(hd->linkname) - 1);
655 hd->linkname[sizeof(hd->linkname) - 1] = '\0';
656 if (ul_oct((u_long)0L, hd->size, sizeof(hd->size), 1))
658 } else if ((arcn->type == PAX_HLK) || (arcn->type == PAX_HRG)) {
660 * no data follows this file, so no pad
662 hd->linkflag = LNKTYPE;
663 l_strncpy(hd->linkname,arcn->ln_name, sizeof(hd->linkname) - 1);
664 hd->linkname[sizeof(hd->linkname) - 1] = '\0';
665 if (ul_oct((u_long)0L, hd->size, sizeof(hd->size), 1))
669 * data follows this file, so set the pad
671 hd->linkflag = AREGTYPE;
672 memset(hd->linkname, 0, sizeof(hd->linkname));
674 if (ul_oct((u_long)arcn->sb.st_size, hd->size,
675 sizeof(hd->size), 1)) {
677 if (uqd_oct((u_quad_t)arcn->sb.st_size, hd->size,
678 sizeof(hd->size), 1)) {
680 paxwarn(1,"File is too large for tar %s", arcn->org_name);
683 arcn->pad = TAR_PAD(arcn->sb.st_size);
687 * copy those fields that are independent of the type
689 if (ul_oct((u_long)arcn->sb.st_mode, hd->mode, sizeof(hd->mode), 0) ||
690 ul_oct((u_long)arcn->sb.st_uid, hd->uid, sizeof(hd->uid), 0) ||
691 ul_oct((u_long)arcn->sb.st_gid, hd->gid, sizeof(hd->gid), 0) ||
692 ul_oct((u_long)arcn->sb.st_mtime, hd->mtime, sizeof(hd->mtime), 1))
696 * calculate and add the checksum, then write the header. A return of
697 * 0 tells the caller to now write the file data, 1 says no data needs
700 if (ul_oct(tar_chksm(hdblk, sizeof(HD_TAR)), hd->chksum,
701 sizeof(hd->chksum), 3))
703 if (wr_rdbuf(hdblk, sizeof(HD_TAR)) < 0)
705 if (wr_skip((off_t)(BLKMULT - sizeof(HD_TAR))) < 0)
707 if ((arcn->type == PAX_CTG) || (arcn->type == PAX_REG))
713 * header field is out of range
715 paxwarn(1, "Tar header field is too small for %s", arcn->org_name);
720 * Routines for POSIX ustar
725 * initialization for ustar read
727 * 0 if ok, -1 otherwise
738 if ((usrtb_start() < 0) || (grptb_start() < 0))
745 * initialization for ustar write
747 * 0 if ok, -1 otherwise
758 if ((uidtb_start() < 0) || (gidtb_start() < 0))
765 * determine if a block given to us is a valid ustar header. We have to
766 * be on the lookout for those pesky blocks of all zero's
768 * 0 if a ustar header, -1 otherwise
773 ustar_id(char *blk, int size)
781 register HD_USTAR *hd;
785 hd = (HD_USTAR *)blk;
788 * check for block of zero's first, a simple and fast test then check
789 * ustar magic cookie. We should use TMAGLEN, but some USTAR archive
790 * programs are fouled up and create archives missing the \0. Last we
791 * check the checksum. If ok we have to assume it is a valid header.
793 if (hd->name[0] == '\0')
795 if (strncmp(hd->magic, TMAGIC, TMAGLEN - 1) != 0)
797 if (asc_ul(hd->chksum,sizeof(hd->chksum),OCT) != tar_chksm(blk,BLKMULT))
804 * extract the values out of block already determined to be a ustar header.
805 * store the values in the ARCHD parameter.
812 ustar_rd(register ARCHD *arcn, register char *buf)
816 register ARCHD *arcn;
820 register HD_USTAR *hd;
822 register int cnt = 0;
827 * we only get proper sized buffers
829 if (ustar_id(buf, BLKMULT) < 0)
831 arcn->org_name = arcn->name;
832 arcn->sb.st_nlink = 1;
835 hd = (HD_USTAR *)buf;
838 * see if the filename is split into two parts. if, so joint the parts.
839 * we copy the prefix first and add a / between the prefix and name.
842 if (*(hd->prefix) != '\0') {
843 cnt = l_strncpy(dest, hd->prefix, sizeof(arcn->name) - 2);
848 arcn->nlen = cnt + l_strncpy(dest, hd->name, sizeof(arcn->name) - cnt);
849 arcn->name[arcn->nlen] = '\0';
852 * follow the spec to the letter. we should only have mode bits, strip
853 * off all other crud we may be passed.
855 arcn->sb.st_mode = (mode_t)(asc_ul(hd->mode, sizeof(hd->mode), OCT) &
858 arcn->sb.st_size = (off_t)asc_ul(hd->size, sizeof(hd->size), OCT);
860 arcn->sb.st_size = (off_t)asc_uqd(hd->size, sizeof(hd->size), OCT);
862 arcn->sb.st_mtime = (time_t)asc_ul(hd->mtime, sizeof(hd->mtime), OCT);
863 arcn->sb.st_ctime = arcn->sb.st_atime = arcn->sb.st_mtime;
866 * If we can find the ascii names for gname and uname in the password
867 * and group files we will use the uid's and gid they bind. Otherwise
868 * we use the uid and gid values stored in the header. (This is what
869 * the POSIX spec wants).
871 hd->gname[sizeof(hd->gname) - 1] = '\0';
872 if (gid_name(hd->gname, &(arcn->sb.st_gid)) < 0)
873 arcn->sb.st_gid = (gid_t)asc_ul(hd->gid, sizeof(hd->gid), OCT);
874 hd->uname[sizeof(hd->uname) - 1] = '\0';
875 if (uid_name(hd->uname, &(arcn->sb.st_uid)) < 0)
876 arcn->sb.st_uid = (uid_t)asc_ul(hd->uid, sizeof(hd->uid), OCT);
879 * set the defaults, these may be changed depending on the file type
881 arcn->ln_name[0] = '\0';
885 arcn->sb.st_rdev = (dev_t)0;
888 * set the mode and PAX type according to the typeflag in the header
890 switch(hd->typeflag) {
892 arcn->type = PAX_FIF;
893 arcn->sb.st_mode |= S_IFIFO;
896 arcn->type = PAX_DIR;
897 arcn->sb.st_mode |= S_IFDIR;
898 arcn->sb.st_nlink = 2;
901 * Some programs that create ustar archives append a '/'
902 * to the pathname for directories. This clearly violates
903 * ustar specs, but we will silently strip it off anyway.
905 if (arcn->name[arcn->nlen - 1] == '/')
906 arcn->name[--arcn->nlen] = '\0';
911 * this type requires the rdev field to be set.
913 if (hd->typeflag == BLKTYPE) {
914 arcn->type = PAX_BLK;
915 arcn->sb.st_mode |= S_IFBLK;
917 arcn->type = PAX_CHR;
918 arcn->sb.st_mode |= S_IFCHR;
920 devmajor = (dev_t)asc_ul(hd->devmajor,sizeof(hd->devmajor),OCT);
921 devminor = (dev_t)asc_ul(hd->devminor,sizeof(hd->devminor),OCT);
922 arcn->sb.st_rdev = TODEV(devmajor, devminor);
926 if (hd->typeflag == SYMTYPE) {
927 arcn->type = PAX_SLK;
928 arcn->sb.st_mode |= S_IFLNK;
930 arcn->type = PAX_HLK;
932 * so printing looks better
934 arcn->sb.st_mode |= S_IFREG;
935 arcn->sb.st_nlink = 2;
940 arcn->ln_nlen = l_strncpy(arcn->ln_name, hd->linkname,
941 sizeof(arcn->ln_name) - 1);
942 arcn->ln_name[arcn->ln_nlen] = '\0';
949 * these types have file data that follows. Set the skip and
952 arcn->type = PAX_REG;
953 arcn->pad = TAR_PAD(arcn->sb.st_size);
954 arcn->skip = arcn->sb.st_size;
955 arcn->sb.st_mode |= S_IFREG;
963 * write a ustar header for the file specified in the ARCHD to the archive
964 * Have to check for file types that cannot be stored and file names that
965 * are too long. Be careful of the term (last arg) to ul_oct, we only use
966 * '\0' for the termination character (this is different than picky tar)
967 * ASSUMED: space after header in header block is zero filled
969 * 0 if file has data to be written after the header, 1 if file has NO
970 * data to write after the header, -1 if archive write failed
975 ustar_wr(register ARCHD *arcn)
979 register ARCHD *arcn;
982 register HD_USTAR *hd;
984 char hdblk[sizeof(HD_USTAR)];
987 * check for those file system types ustar cannot store
989 if (arcn->type == PAX_SCK) {
990 paxwarn(1, "Ustar cannot archive a socket %s", arcn->org_name);
995 * check the length of the linkname
997 if (((arcn->type == PAX_SLK) || (arcn->type == PAX_HLK) ||
998 (arcn->type == PAX_HRG)) && (arcn->ln_nlen >= sizeof(hd->linkname))){
999 paxwarn(1, "Link name too long for ustar %s", arcn->ln_name);
1004 * split the path name into prefix and name fields (if needed). if
1005 * pt != arcn->name, the name has to be split
1007 if ((pt = name_split(arcn->name, arcn->nlen)) == NULL) {
1008 paxwarn(1, "File name too long for ustar %s", arcn->name);
1011 hd = (HD_USTAR *)hdblk;
1015 * split the name, or zero out the prefix
1017 if (pt != arcn->name) {
1019 * name was split, pt points at the / where the split is to
1020 * occur, we remove the / and copy the first part to the prefix
1023 l_strncpy(hd->prefix, arcn->name, sizeof(hd->prefix) - 1);
1026 memset(hd->prefix, 0, sizeof(hd->prefix));
1029 * copy the name part. this may be the whole path or the part after
1032 l_strncpy(hd->name, pt, sizeof(hd->name) - 1);
1033 hd->name[sizeof(hd->name) - 1] = '\0';
1036 * set the fields in the header that are type dependent
1038 switch(arcn->type) {
1040 hd->typeflag = DIRTYPE;
1041 memset(hd->linkname, 0, sizeof(hd->linkname));
1042 memset(hd->devmajor, 0, sizeof(hd->devmajor));
1043 memset(hd->devminor, 0, sizeof(hd->devminor));
1044 if (ul_oct((u_long)0L, hd->size, sizeof(hd->size), 3))
1049 if (arcn->type == PAX_CHR)
1050 hd->typeflag = CHRTYPE;
1052 hd->typeflag = BLKTYPE;
1053 memset(hd->linkname, 0, sizeof(hd->linkname));
1054 if (ul_oct((u_long)MAJOR(arcn->sb.st_rdev), hd->devmajor,
1055 sizeof(hd->devmajor), 3) ||
1056 ul_oct((u_long)MINOR(arcn->sb.st_rdev), hd->devminor,
1057 sizeof(hd->devminor), 3) ||
1058 ul_oct((u_long)0L, hd->size, sizeof(hd->size), 3))
1062 hd->typeflag = FIFOTYPE;
1063 memset(hd->linkname, 0, sizeof(hd->linkname));
1064 memset(hd->devmajor, 0, sizeof(hd->devmajor));
1065 memset(hd->devminor, 0, sizeof(hd->devminor));
1066 if (ul_oct((u_long)0L, hd->size, sizeof(hd->size), 3))
1072 if (arcn->type == PAX_SLK)
1073 hd->typeflag = SYMTYPE;
1075 hd->typeflag = LNKTYPE;
1076 l_strncpy(hd->linkname,arcn->ln_name, sizeof(hd->linkname) - 1);
1077 hd->linkname[sizeof(hd->linkname) - 1] = '\0';
1078 memset(hd->devmajor, 0, sizeof(hd->devmajor));
1079 memset(hd->devminor, 0, sizeof(hd->devminor));
1080 if (ul_oct((u_long)0L, hd->size, sizeof(hd->size), 3))
1087 * file data with this type, set the padding
1089 if (arcn->type == PAX_CTG)
1090 hd->typeflag = CONTTYPE;
1092 hd->typeflag = REGTYPE;
1093 memset(hd->linkname, 0, sizeof(hd->linkname));
1094 memset(hd->devmajor, 0, sizeof(hd->devmajor));
1095 memset(hd->devminor, 0, sizeof(hd->devminor));
1096 arcn->pad = TAR_PAD(arcn->sb.st_size);
1098 if (ul_oct((u_long)arcn->sb.st_size, hd->size,
1099 sizeof(hd->size), 3)) {
1101 if (uqd_oct((u_quad_t)arcn->sb.st_size, hd->size,
1102 sizeof(hd->size), 3)) {
1104 paxwarn(1,"File is too long for ustar %s",arcn->org_name);
1110 l_strncpy(hd->magic, TMAGIC, TMAGLEN);
1111 l_strncpy(hd->version, TVERSION, TVERSLEN);
1114 * set the remaining fields. Some versions want all 16 bits of mode
1115 * we better humor them (they really do not meet spec though)....
1117 if (ul_oct((u_long)arcn->sb.st_mode, hd->mode, sizeof(hd->mode), 3) ||
1118 ul_oct((u_long)arcn->sb.st_uid, hd->uid, sizeof(hd->uid), 3) ||
1119 ul_oct((u_long)arcn->sb.st_gid, hd->gid, sizeof(hd->gid), 3) ||
1120 ul_oct((u_long)arcn->sb.st_mtime,hd->mtime,sizeof(hd->mtime),3))
1122 l_strncpy(hd->uname,name_uid(arcn->sb.st_uid, 0),sizeof(hd->uname));
1123 l_strncpy(hd->gname,name_gid(arcn->sb.st_gid, 0),sizeof(hd->gname));
1126 * calculate and store the checksum write the header to the archive
1127 * return 0 tells the caller to now write the file data, 1 says no data
1128 * needs to be written
1130 if (ul_oct(tar_chksm(hdblk, sizeof(HD_USTAR)), hd->chksum,
1131 sizeof(hd->chksum), 3))
1133 if (wr_rdbuf(hdblk, sizeof(HD_USTAR)) < 0)
1135 if (wr_skip((off_t)(BLKMULT - sizeof(HD_USTAR))) < 0)
1137 if ((arcn->type == PAX_CTG) || (arcn->type == PAX_REG))
1143 * header field is out of range
1145 paxwarn(1, "Ustar header field is too small for %s", arcn->org_name);
1151 * see if the name has to be split for storage in a ustar header. We try
1152 * to fit the entire name in the name field without splitting if we can.
1153 * The split point is always at a /
1155 * character pointer to split point (always the / that is to be removed
1156 * if the split is not needed, the points is set to the start of the file
1157 * name (it would violate the spec to split there). A NULL is returned if
1158 * the file name is too long
1163 name_split(register char *name, register int len)
1166 name_split(name, len)
1167 register char *name;
1171 register char *start;
1174 * check to see if the file name is small enough to fit in the name
1175 * field. if so just return a pointer to the name.
1179 if (len > (TPFSZ + TNMSZ))
1183 * we start looking at the biggest sized piece that fits in the name
1184 * field. We walk forward looking for a slash to split at. The idea is
1185 * to find the biggest piece to fit in the name field (or the smallest
1186 * prefix we can find)
1188 start = name + len - TNMSZ;
1189 while ((*start != '\0') && (*start != '/'))
1193 * if we hit the end of the string, this name cannot be split, so we
1194 * cannot store this file.
1201 * NOTE: /str where the length of str == TNMSZ can not be stored under
1202 * the p1003.1-1990 spec for ustar. We could force a prefix of / and
1203 * the file would then expand on extract to //str. The len == 0 below
1204 * makes this special case follow the spec to the letter.
1206 if ((len >= TPFSZ) || (len == 0))
1210 * ok have a split point, return it to the caller