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
40 static char sccsid[] = "@(#)tar.c 8.2 (Berkeley) 4/18/94";
42 static const char rcsid[] =
43 "$FreeBSD: src/bin/pax/tar.c,v 1.13.2.1 2001/08/01 05:03:12 obrien Exp $";
46 #include <sys/types.h>
58 * Routines for reading, writing and header identify of various versions of tar
61 static u_long tar_chksm __P((register char *, register int));
62 static char *name_split __P((register char *, register int));
63 static int ul_oct __P((u_long, register char *, register int, int));
65 static int uqd_oct __P((u_quad_t, register char *, register int, int));
69 * Routines common to all versions of tar
72 static int tar_nodir; /* do not write dirs under old tar */
76 * add the tar trailer of two null blocks
78 * 0 if ok, -1 otherwise (what wr_skip returns)
89 return(wr_skip((off_t)(NULLCNT*BLKMULT)));
94 * no cleanup needed here, just return size of trailer (for append)
96 * size of trailer (2 * BLKMULT)
107 return((off_t)(NULLCNT*BLKMULT));
112 * Called to determine if a header block is a valid trailer. We are passed
113 * the block, the in_sync flag (which tells us we are in resync mode;
114 * looking for a valid header), and cnt (which starts at zero) which is
115 * used to count the number of empty blocks we have seen so far.
117 * 0 if a valid trailer, -1 if not a valid trailer, or 1 if the block
118 * could never contain a header.
123 tar_trail(register char *buf, register int in_resync, register int *cnt)
126 tar_trail(buf, in_resync, cnt)
128 register int in_resync;
135 * look for all zero, trailer is two consecutive blocks of zero
137 for (i = 0; i < BLKMULT; ++i) {
143 * if not all zero it is not a trailer, but MIGHT be a header.
149 * When given a zero block, we must be careful!
150 * If we are not in resync mode, check for the trailer. Have to watch
151 * out that we do not mis-identify file data as the trailer, so we do
152 * NOT try to id a trailer during resync mode. During resync mode we
153 * might as well throw this block out since a valid header can NEVER be
154 * a block of all 0 (we must have a valid file name).
156 if (!in_resync && (++*cnt >= NULLCNT))
163 * convert an unsigned long to an octal string. many oddball field
164 * termination characters are used by the various versions of tar in the
165 * different fields. term selects which kind to use. str is '0' padded
166 * at the front to len. we are unable to use only one format as many old
167 * tar readers are very cranky about this.
169 * 0 if the number fit into the string, -1 otherwise
174 ul_oct(u_long val, register char *str, register int len, int term)
177 ul_oct(val, str, len, term)
187 * term selects the appropriate character(s) for the end of the string
209 * convert and blank pad if there is space
212 *pt-- = '0' + (char)(val & 0x7);
213 if ((val = val >> 3) == (u_long)0)
219 if (val != (u_long)0)
227 * convert an u_quad_t to an octal string. one of many oddball field
228 * termination characters are used by the various versions of tar in the
229 * different fields. term selects which kind to use. str is '0' padded
230 * at the front to len. we are unable to use only one format as many old
231 * tar readers are very cranky about this.
233 * 0 if the number fit into the string, -1 otherwise
238 uqd_oct(u_quad_t val, register char *str, register int len, int term)
241 uqd_oct(val, str, len, term)
251 * term selects the appropriate character(s) for the end of the string
273 * convert and blank pad if there is space
276 *pt-- = '0' + (char)(val & 0x7);
277 if ((val = val >> 3) == 0)
283 if (val != (u_quad_t)0)
291 * calculate the checksum for a tar block counting the checksum field as
292 * all blanks (BLNKSUM is that value pre-calculated, the sum of 8 blanks).
293 * NOTE: we use len to short circuit summing 0's on write since we ALWAYS
294 * pad headers with 0.
296 * unsigned long checksum
301 tar_chksm(register char *blk, register int len)
311 u_long chksm = BLNKSUM; /* initial value is checksum field sum */
314 * add the part of the block before the checksum field
317 stop = blk + CHK_OFFSET;
319 chksm += (u_long)(*pt++ & 0xff);
321 * move past the checksum field and keep going, spec counts the
322 * checksum field as the sum of 8 blanks (which is pre-computed as
324 * ASSUMED: len is greater than CHK_OFFSET. (len is where our 0 padding
325 * starts, no point in summing zero's)
330 chksm += (u_long)(*pt++ & 0xff);
335 * Routines for old BSD style tar (also made portable to sysV tar)
340 * determine if a block given to us is a valid tar header (and not a USTAR
341 * header). We have to be on the lookout for those pesky blocks of all
344 * 0 if a tar header, -1 otherwise
349 tar_id(register char *blk, int size)
358 register HD_USTAR *uhd;
363 uhd = (HD_USTAR *)blk;
366 * check for block of zero's first, a simple and fast test, then make
367 * sure this is not a ustar header by looking for the ustar magic
368 * cookie. We should use TMAGLEN, but some USTAR archive programs are
369 * wrong and create archives missing the \0. Last we check the
370 * checksum. If this is ok we have to assume it is a valid header.
372 if (hd->name[0] == '\0')
374 if (strncmp(uhd->magic, TMAGIC, TMAGLEN - 1) == 0)
376 if (asc_ul(hd->chksum,sizeof(hd->chksum),OCT) != tar_chksm(blk,BLKMULT))
383 * handle tar format specific -o options
385 * 0 if ok -1 otherwise
398 while ((opt = opt_next()) != NULL) {
399 if (strcmp(opt->name, TAR_OPTION) ||
400 strcmp(opt->value, TAR_NODIR)) {
401 paxwarn(1, "Unknown tar format -o option/value pair %s=%s",
402 opt->name, opt->value);
403 paxwarn(1,"%s=%s is the only supported tar format option",
404 TAR_OPTION, TAR_NODIR);
409 * we only support one option, and only when writing
411 if ((act != APPND) && (act != ARCHIVE)) {
412 paxwarn(1, "%s=%s is only supported when writing.",
413 opt->name, opt->value);
424 * extract the values out of block already determined to be a tar header.
425 * store the values in the ARCHD parameter.
432 tar_rd(register ARCHD *arcn, register char *buf)
436 register ARCHD *arcn;
444 * we only get proper sized buffers passed to us
446 if (tar_id(buf, BLKMULT) < 0)
448 arcn->org_name = arcn->name;
449 arcn->sb.st_nlink = 1;
453 * copy out the name and values in the stat buffer
456 arcn->nlen = l_strncpy(arcn->name, hd->name, sizeof(arcn->name) - 1);
457 arcn->name[arcn->nlen] = '\0';
458 arcn->sb.st_mode = (mode_t)(asc_ul(hd->mode,sizeof(hd->mode),OCT) &
460 arcn->sb.st_uid = (uid_t)asc_ul(hd->uid, sizeof(hd->uid), OCT);
461 arcn->sb.st_gid = (gid_t)asc_ul(hd->gid, sizeof(hd->gid), OCT);
463 arcn->sb.st_size = (off_t)asc_ul(hd->size, sizeof(hd->size), OCT);
465 arcn->sb.st_size = (off_t)asc_uqd(hd->size, sizeof(hd->size), OCT);
467 arcn->sb.st_mtime = (time_t)asc_ul(hd->mtime, sizeof(hd->mtime), OCT);
468 arcn->sb.st_ctime = arcn->sb.st_atime = arcn->sb.st_mtime;
471 * have to look at the last character, it may be a '/' and that is used
472 * to encode this as a directory
474 pt = &(arcn->name[arcn->nlen - 1]);
477 switch(hd->linkflag) {
480 * symbolic link, need to get the link name and set the type in
481 * the st_mode so -v printing will look correct.
483 arcn->type = PAX_SLK;
484 arcn->ln_nlen = l_strncpy(arcn->ln_name, hd->linkname,
485 sizeof(arcn->ln_name) - 1);
486 arcn->ln_name[arcn->ln_nlen] = '\0';
487 arcn->sb.st_mode |= S_IFLNK;
491 * hard link, need to get the link name, set the type in the
492 * st_mode and st_nlink so -v printing will look better.
494 arcn->type = PAX_HLK;
495 arcn->sb.st_nlink = 2;
496 arcn->ln_nlen = l_strncpy(arcn->ln_name, hd->linkname,
497 sizeof(arcn->ln_name) - 1);
498 arcn->ln_name[arcn->ln_nlen] = '\0';
501 * no idea of what type this thing really points at, but
502 * we set something for printing only.
504 arcn->sb.st_mode |= S_IFREG;
508 * It is a directory, set the mode for -v printing
510 arcn->type = PAX_DIR;
511 arcn->sb.st_mode |= S_IFDIR;
512 arcn->sb.st_nlink = 2;
513 arcn->ln_name[0] = '\0';
520 * If we have a trailing / this is a directory and NOT a file.
522 arcn->ln_name[0] = '\0';
526 * it is a directory, set the mode for -v printing
528 arcn->type = PAX_DIR;
529 arcn->sb.st_mode |= S_IFDIR;
530 arcn->sb.st_nlink = 2;
533 * have a file that will be followed by data. Set the
534 * skip value to the size field and calculate the size
537 arcn->type = PAX_REG;
538 arcn->sb.st_mode |= S_IFREG;
539 arcn->pad = TAR_PAD(arcn->sb.st_size);
540 arcn->skip = arcn->sb.st_size;
546 * strip off any trailing slash.
557 * write a tar header for the file specified in the ARCHD to the archive.
558 * Have to check for file types that cannot be stored and file names that
559 * are too long. Be careful of the term (last arg) to ul_oct, each field
560 * of tar has it own spec for the termination character(s).
561 * ASSUMED: space after header in header block is zero filled
563 * 0 if file has data to be written after the header, 1 if file has NO
564 * data to write after the header, -1 if archive write failed
569 tar_wr(register ARCHD *arcn)
573 register ARCHD *arcn;
578 char hdblk[sizeof(HD_TAR)];
581 * check for those file system types which tar cannot store
586 * user asked that dirs not be written to the archive
592 paxwarn(1, "Tar cannot archive a character device %s",
596 paxwarn(1, "Tar cannot archive a block device %s", arcn->org_name);
599 paxwarn(1, "Tar cannot archive a socket %s", arcn->org_name);
602 paxwarn(1, "Tar cannot archive a fifo %s", arcn->org_name);
607 if (arcn->ln_nlen > sizeof(hd->linkname)) {
608 paxwarn(1,"Link name too long for tar %s", arcn->ln_name);
619 * check file name len, remember extra char for dirs (the / at the end)
622 if (arcn->type == PAX_DIR)
624 if (len >= sizeof(hd->name)) {
625 paxwarn(1, "File name too long for tar %s", arcn->name);
630 * copy the data out of the ARCHD into the tar header based on the type
631 * of the file. Remember many tar readers want the unused fields to be
632 * padded with zero. We set the linkflag field (type), the linkname
633 * (or zero if not used),the size, and set the padding (if any) to be
634 * added after the file data (0 for all other types, as they only have
637 hd = (HD_TAR *)hdblk;
638 l_strncpy(hd->name, arcn->name, sizeof(hd->name) - 1);
639 hd->name[sizeof(hd->name) - 1] = '\0';
642 if (arcn->type == PAX_DIR) {
644 * directories are the same as files, except have a filename
645 * that ends with a /, we add the slash here. No data follows,
648 hd->linkflag = AREGTYPE;
649 memset(hd->linkname, 0, sizeof(hd->linkname));
650 hd->name[len-1] = '/';
651 if (ul_oct((u_long)0L, hd->size, sizeof(hd->size), 1))
653 } else if (arcn->type == PAX_SLK) {
655 * no data follows this file, so no pad
657 hd->linkflag = SYMTYPE;
658 l_strncpy(hd->linkname,arcn->ln_name, sizeof(hd->linkname) - 1);
659 hd->linkname[sizeof(hd->linkname) - 1] = '\0';
660 if (ul_oct((u_long)0L, hd->size, sizeof(hd->size), 1))
662 } else if ((arcn->type == PAX_HLK) || (arcn->type == PAX_HRG)) {
664 * no data follows this file, so no pad
666 hd->linkflag = LNKTYPE;
667 l_strncpy(hd->linkname,arcn->ln_name, sizeof(hd->linkname) - 1);
668 hd->linkname[sizeof(hd->linkname) - 1] = '\0';
669 if (ul_oct((u_long)0L, hd->size, sizeof(hd->size), 1))
673 * data follows this file, so set the pad
675 hd->linkflag = AREGTYPE;
676 memset(hd->linkname, 0, sizeof(hd->linkname));
678 if (ul_oct((u_long)arcn->sb.st_size, hd->size,
679 sizeof(hd->size), 1)) {
681 if (uqd_oct((u_quad_t)arcn->sb.st_size, hd->size,
682 sizeof(hd->size), 1)) {
684 paxwarn(1,"File is too large for tar %s", arcn->org_name);
687 arcn->pad = TAR_PAD(arcn->sb.st_size);
691 * copy those fields that are independent of the type
693 if (ul_oct((u_long)arcn->sb.st_mode, hd->mode, sizeof(hd->mode), 0) ||
694 ul_oct((u_long)arcn->sb.st_uid, hd->uid, sizeof(hd->uid), 0) ||
695 ul_oct((u_long)arcn->sb.st_gid, hd->gid, sizeof(hd->gid), 0) ||
696 ul_oct((u_long)arcn->sb.st_mtime, hd->mtime, sizeof(hd->mtime), 1))
700 * calculate and add the checksum, then write the header. A return of
701 * 0 tells the caller to now write the file data, 1 says no data needs
704 if (ul_oct(tar_chksm(hdblk, sizeof(HD_TAR)), hd->chksum,
705 sizeof(hd->chksum), 3))
707 if (wr_rdbuf(hdblk, sizeof(HD_TAR)) < 0)
709 if (wr_skip((off_t)(BLKMULT - sizeof(HD_TAR))) < 0)
711 if ((arcn->type == PAX_CTG) || (arcn->type == PAX_REG))
717 * header field is out of range
719 paxwarn(1, "Tar header field is too small for %s", arcn->org_name);
724 * Routines for POSIX ustar
729 * initialization for ustar read
731 * 0 if ok, -1 otherwise
742 if ((usrtb_start() < 0) || (grptb_start() < 0))
749 * initialization for ustar write
751 * 0 if ok, -1 otherwise
762 if ((uidtb_start() < 0) || (gidtb_start() < 0))
769 * determine if a block given to us is a valid ustar header. We have to
770 * be on the lookout for those pesky blocks of all zero's
772 * 0 if a ustar header, -1 otherwise
777 ustar_id(char *blk, int size)
785 register HD_USTAR *hd;
789 hd = (HD_USTAR *)blk;
792 * check for block of zero's first, a simple and fast test then check
793 * ustar magic cookie. We should use TMAGLEN, but some USTAR archive
794 * programs are fouled up and create archives missing the \0. Last we
795 * check the checksum. If ok we have to assume it is a valid header.
797 if (hd->name[0] == '\0')
799 if (strncmp(hd->magic, TMAGIC, TMAGLEN - 1) != 0)
801 if (asc_ul(hd->chksum,sizeof(hd->chksum),OCT) != tar_chksm(blk,BLKMULT))
808 * extract the values out of block already determined to be a ustar header.
809 * store the values in the ARCHD parameter.
816 ustar_rd(register ARCHD *arcn, register char *buf)
820 register ARCHD *arcn;
824 register HD_USTAR *hd;
826 register int cnt = 0;
831 * we only get proper sized buffers
833 if (ustar_id(buf, BLKMULT) < 0)
835 arcn->org_name = arcn->name;
836 arcn->sb.st_nlink = 1;
839 hd = (HD_USTAR *)buf;
842 * see if the filename is split into two parts. if, so joint the parts.
843 * we copy the prefix first and add a / between the prefix and name.
846 if (*(hd->prefix) != '\0') {
847 cnt = l_strncpy(dest, hd->prefix, sizeof(arcn->name) - 2);
852 arcn->nlen = cnt + l_strncpy(dest, hd->name, sizeof(arcn->name) - cnt);
853 arcn->name[arcn->nlen] = '\0';
856 * follow the spec to the letter. we should only have mode bits, strip
857 * off all other crud we may be passed.
859 arcn->sb.st_mode = (mode_t)(asc_ul(hd->mode, sizeof(hd->mode), OCT) &
862 arcn->sb.st_size = (off_t)asc_ul(hd->size, sizeof(hd->size), OCT);
864 arcn->sb.st_size = (off_t)asc_uqd(hd->size, sizeof(hd->size), OCT);
866 arcn->sb.st_mtime = (time_t)asc_ul(hd->mtime, sizeof(hd->mtime), OCT);
867 arcn->sb.st_ctime = arcn->sb.st_atime = arcn->sb.st_mtime;
870 * If we can find the ascii names for gname and uname in the password
871 * and group files we will use the uid's and gid they bind. Otherwise
872 * we use the uid and gid values stored in the header. (This is what
873 * the POSIX spec wants).
875 hd->gname[sizeof(hd->gname) - 1] = '\0';
876 if (gid_name(hd->gname, &(arcn->sb.st_gid)) < 0)
877 arcn->sb.st_gid = (gid_t)asc_ul(hd->gid, sizeof(hd->gid), OCT);
878 hd->uname[sizeof(hd->uname) - 1] = '\0';
879 if (uid_name(hd->uname, &(arcn->sb.st_uid)) < 0)
880 arcn->sb.st_uid = (uid_t)asc_ul(hd->uid, sizeof(hd->uid), OCT);
883 * set the defaults, these may be changed depending on the file type
885 arcn->ln_name[0] = '\0';
889 arcn->sb.st_rdev = (dev_t)0;
892 * set the mode and PAX type according to the typeflag in the header
894 switch(hd->typeflag) {
896 arcn->type = PAX_FIF;
897 arcn->sb.st_mode |= S_IFIFO;
900 arcn->type = PAX_DIR;
901 arcn->sb.st_mode |= S_IFDIR;
902 arcn->sb.st_nlink = 2;
905 * Some programs that create ustar archives append a '/'
906 * to the pathname for directories. This clearly violates
907 * ustar specs, but we will silently strip it off anyway.
909 if (arcn->name[arcn->nlen - 1] == '/')
910 arcn->name[--arcn->nlen] = '\0';
915 * this type requires the rdev field to be set.
917 if (hd->typeflag == BLKTYPE) {
918 arcn->type = PAX_BLK;
919 arcn->sb.st_mode |= S_IFBLK;
921 arcn->type = PAX_CHR;
922 arcn->sb.st_mode |= S_IFCHR;
924 devmajor = (dev_t)asc_ul(hd->devmajor,sizeof(hd->devmajor),OCT);
925 devminor = (dev_t)asc_ul(hd->devminor,sizeof(hd->devminor),OCT);
926 arcn->sb.st_rdev = TODEV(devmajor, devminor);
930 if (hd->typeflag == SYMTYPE) {
931 arcn->type = PAX_SLK;
932 arcn->sb.st_mode |= S_IFLNK;
934 arcn->type = PAX_HLK;
936 * so printing looks better
938 arcn->sb.st_mode |= S_IFREG;
939 arcn->sb.st_nlink = 2;
944 arcn->ln_nlen = l_strncpy(arcn->ln_name, hd->linkname,
945 sizeof(arcn->ln_name) - 1);
946 arcn->ln_name[arcn->ln_nlen] = '\0';
953 * these types have file data that follows. Set the skip and
956 arcn->type = PAX_REG;
957 arcn->pad = TAR_PAD(arcn->sb.st_size);
958 arcn->skip = arcn->sb.st_size;
959 arcn->sb.st_mode |= S_IFREG;
967 * write a ustar header for the file specified in the ARCHD to the archive
968 * Have to check for file types that cannot be stored and file names that
969 * are too long. Be careful of the term (last arg) to ul_oct, we only use
970 * '\0' for the termination character (this is different than picky tar)
971 * ASSUMED: space after header in header block is zero filled
973 * 0 if file has data to be written after the header, 1 if file has NO
974 * data to write after the header, -1 if archive write failed
979 ustar_wr(register ARCHD *arcn)
983 register ARCHD *arcn;
986 register HD_USTAR *hd;
988 char hdblk[sizeof(HD_USTAR)];
991 * check for those file system types ustar cannot store
993 if (arcn->type == PAX_SCK) {
994 paxwarn(1, "Ustar cannot archive a socket %s", arcn->org_name);
999 * check the length of the linkname
1001 if (((arcn->type == PAX_SLK) || (arcn->type == PAX_HLK) ||
1002 (arcn->type == PAX_HRG)) && (arcn->ln_nlen >= sizeof(hd->linkname))){
1003 paxwarn(1, "Link name too long for ustar %s", arcn->ln_name);
1008 * split the path name into prefix and name fields (if needed). if
1009 * pt != arcn->name, the name has to be split
1011 if ((pt = name_split(arcn->name, arcn->nlen)) == NULL) {
1012 paxwarn(1, "File name too long for ustar %s", arcn->name);
1015 hd = (HD_USTAR *)hdblk;
1019 * split the name, or zero out the prefix
1021 if (pt != arcn->name) {
1023 * name was split, pt points at the / where the split is to
1024 * occur, we remove the / and copy the first part to the prefix
1027 l_strncpy(hd->prefix, arcn->name, sizeof(hd->prefix) - 1);
1030 memset(hd->prefix, 0, sizeof(hd->prefix));
1033 * copy the name part. this may be the whole path or the part after
1036 l_strncpy(hd->name, pt, sizeof(hd->name) - 1);
1037 hd->name[sizeof(hd->name) - 1] = '\0';
1040 * set the fields in the header that are type dependent
1042 switch(arcn->type) {
1044 hd->typeflag = DIRTYPE;
1045 memset(hd->linkname, 0, sizeof(hd->linkname));
1046 memset(hd->devmajor, 0, sizeof(hd->devmajor));
1047 memset(hd->devminor, 0, sizeof(hd->devminor));
1048 if (ul_oct((u_long)0L, hd->size, sizeof(hd->size), 3))
1053 if (arcn->type == PAX_CHR)
1054 hd->typeflag = CHRTYPE;
1056 hd->typeflag = BLKTYPE;
1057 memset(hd->linkname, 0, sizeof(hd->linkname));
1058 if (ul_oct((u_long)MAJOR(arcn->sb.st_rdev), hd->devmajor,
1059 sizeof(hd->devmajor), 3) ||
1060 ul_oct((u_long)MINOR(arcn->sb.st_rdev), hd->devminor,
1061 sizeof(hd->devminor), 3) ||
1062 ul_oct((u_long)0L, hd->size, sizeof(hd->size), 3))
1066 hd->typeflag = FIFOTYPE;
1067 memset(hd->linkname, 0, sizeof(hd->linkname));
1068 memset(hd->devmajor, 0, sizeof(hd->devmajor));
1069 memset(hd->devminor, 0, sizeof(hd->devminor));
1070 if (ul_oct((u_long)0L, hd->size, sizeof(hd->size), 3))
1076 if (arcn->type == PAX_SLK)
1077 hd->typeflag = SYMTYPE;
1079 hd->typeflag = LNKTYPE;
1080 l_strncpy(hd->linkname,arcn->ln_name, sizeof(hd->linkname) - 1);
1081 hd->linkname[sizeof(hd->linkname) - 1] = '\0';
1082 memset(hd->devmajor, 0, sizeof(hd->devmajor));
1083 memset(hd->devminor, 0, sizeof(hd->devminor));
1084 if (ul_oct((u_long)0L, hd->size, sizeof(hd->size), 3))
1091 * file data with this type, set the padding
1093 if (arcn->type == PAX_CTG)
1094 hd->typeflag = CONTTYPE;
1096 hd->typeflag = REGTYPE;
1097 memset(hd->linkname, 0, sizeof(hd->linkname));
1098 memset(hd->devmajor, 0, sizeof(hd->devmajor));
1099 memset(hd->devminor, 0, sizeof(hd->devminor));
1100 arcn->pad = TAR_PAD(arcn->sb.st_size);
1102 if (ul_oct((u_long)arcn->sb.st_size, hd->size,
1103 sizeof(hd->size), 3)) {
1105 if (uqd_oct((u_quad_t)arcn->sb.st_size, hd->size,
1106 sizeof(hd->size), 3)) {
1108 paxwarn(1,"File is too long for ustar %s",arcn->org_name);
1114 l_strncpy(hd->magic, TMAGIC, TMAGLEN);
1115 l_strncpy(hd->version, TVERSION, TVERSLEN);
1118 * set the remaining fields. Some versions want all 16 bits of mode
1119 * we better humor them (they really do not meet spec though)....
1121 if (ul_oct((u_long)arcn->sb.st_mode, hd->mode, sizeof(hd->mode), 3) ||
1122 ul_oct((u_long)arcn->sb.st_uid, hd->uid, sizeof(hd->uid), 3) ||
1123 ul_oct((u_long)arcn->sb.st_gid, hd->gid, sizeof(hd->gid), 3) ||
1124 ul_oct((u_long)arcn->sb.st_mtime,hd->mtime,sizeof(hd->mtime),3))
1126 l_strncpy(hd->uname,name_uid(arcn->sb.st_uid, 0),sizeof(hd->uname));
1127 l_strncpy(hd->gname,name_gid(arcn->sb.st_gid, 0),sizeof(hd->gname));
1130 * calculate and store the checksum write the header to the archive
1131 * return 0 tells the caller to now write the file data, 1 says no data
1132 * needs to be written
1134 if (ul_oct(tar_chksm(hdblk, sizeof(HD_USTAR)), hd->chksum,
1135 sizeof(hd->chksum), 3))
1137 if (wr_rdbuf(hdblk, sizeof(HD_USTAR)) < 0)
1139 if (wr_skip((off_t)(BLKMULT - sizeof(HD_USTAR))) < 0)
1141 if ((arcn->type == PAX_CTG) || (arcn->type == PAX_REG))
1147 * header field is out of range
1149 paxwarn(1, "Ustar header field is too small for %s", arcn->org_name);
1155 * see if the name has to be split for storage in a ustar header. We try
1156 * to fit the entire name in the name field without splitting if we can.
1157 * The split point is always at a /
1159 * character pointer to split point (always the / that is to be removed
1160 * if the split is not needed, the points is set to the start of the file
1161 * name (it would violate the spec to split there). A NULL is returned if
1162 * the file name is too long
1167 name_split(register char *name, register int len)
1170 name_split(name, len)
1171 register char *name;
1175 register char *start;
1178 * check to see if the file name is small enough to fit in the name
1179 * field. if so just return a pointer to the name.
1183 if (len > (TPFSZ + TNMSZ))
1187 * we start looking at the biggest sized piece that fits in the name
1188 * field. We walk forward looking for a slash to split at. The idea is
1189 * to find the biggest piece to fit in the name field (or the smallest
1190 * prefix we can find)
1192 start = name + len - TNMSZ;
1193 while ((*start != '\0') && (*start != '/'))
1197 * if we hit the end of the string, this name cannot be split, so we
1198 * cannot store this file.
1205 * NOTE: /str where the length of str == TNMSZ can not be stored under
1206 * the p1003.1-1990 spec for ustar. We could force a prefix of / and
1207 * the file would then expand on extract to //str. The len == 0 below
1208 * makes this special case follow the spec to the letter.
1210 if ((len >= TPFSZ) || (len == 0))
1214 * ok have a split point, return it to the caller