1 /* $OpenBSD: tar.c,v 1.13 1998/09/26 21:29:41 millert Exp $ */
2 /* $NetBSD: tar.c,v 1.5 1995/03/21 09:07:49 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. All advertising materials mentioning features or use of this software
21 * must display the following acknowledgement:
22 * This product includes software developed by the University of
23 * California, Berkeley and its contributors.
24 * 4. Neither the name of the University nor the names of its contributors
25 * may be used to endorse or promote products derived from this software
26 * without specific prior written permission.
28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
43 static char sccsid[] = "@(#)tar.c 8.2 (Berkeley) 4/18/94";
45 static char rcsid[] = "$OpenBSD: tar.c,v 1.13 1998/09/26 21:29:41 millert Exp $";
49 #include <sys/types.h>
52 #include <sys/param.h>
62 * Routines for reading, writing and header identify of various versions of tar
65 static u_long tar_chksm __P((register char *, register int));
66 static char *name_split __P((register char *, register int));
67 static int ul_oct __P((u_long, register char *, register int, int));
69 static int uqd_oct __P((u_quad_t, register char *, register int, int));
73 * Routines common to all versions of tar
76 static int tar_nodir; /* do not write dirs under old tar */
80 * add the tar trailer of two null blocks
82 * 0 if ok, -1 otherwise (what wr_skip returns)
93 return(wr_skip((off_t)(NULLCNT*BLKMULT)));
98 * no cleanup needed here, just return size of trailer (for append)
100 * size of trailer (2 * BLKMULT)
111 return((off_t)(NULLCNT*BLKMULT));
116 * Called to determine if a header block is a valid trailer. We are passed
117 * the block, the in_sync flag (which tells us we are in resync mode;
118 * looking for a valid header), and cnt (which starts at zero) which is
119 * used to count the number of empty blocks we have seen so far.
121 * 0 if a valid trailer, -1 if not a valid trailer, or 1 if the block
122 * could never contain a header.
127 tar_trail(register char *buf, register int in_resync, register int *cnt)
130 tar_trail(buf, in_resync, cnt)
132 register int in_resync;
139 * look for all zero, trailer is two consecutive blocks of zero
141 for (i = 0; i < BLKMULT; ++i) {
147 * if not all zero it is not a trailer, but MIGHT be a header.
153 * When given a zero block, we must be careful!
154 * If we are not in resync mode, check for the trailer. Have to watch
155 * out that we do not mis-identify file data as the trailer, so we do
156 * NOT try to id a trailer during resync mode. During resync mode we
157 * might as well throw this block out since a valid header can NEVER be
158 * a block of all 0 (we must have a valid file name).
160 if (!in_resync && (++*cnt >= NULLCNT))
167 * convert an unsigned long to an octal string. many oddball field
168 * termination characters are used by the various versions of tar in the
169 * different fields. term selects which kind to use. str is '0' padded
170 * at the front to len. we are unable to use only one format as many old
171 * tar readers are very cranky about this.
173 * 0 if the number fit into the string, -1 otherwise
178 ul_oct(u_long val, register char *str, register int len, int term)
181 ul_oct(val, str, len, term)
191 * term selects the appropriate character(s) for the end of the string
213 * convert and blank pad if there is space
216 *pt-- = '0' + (char)(val & 0x7);
217 if ((val = val >> 3) == (u_long)0)
223 if (val != (u_long)0)
231 * convert an u_quad_t to an octal string. one of many oddball field
232 * termination characters are used by the various versions of tar in the
233 * different fields. term selects which kind to use. str is '0' padded
234 * at the front to len. we are unable to use only one format as many old
235 * tar readers are very cranky about this.
237 * 0 if the number fit into the string, -1 otherwise
242 uqd_oct(u_quad_t val, register char *str, register int len, int term)
245 uqd_oct(val, str, len, term)
255 * term selects the appropriate character(s) for the end of the string
277 * convert and blank pad if there is space
280 *pt-- = '0' + (char)(val & 0x7);
281 if ((val = val >> 3) == 0)
287 if (val != (u_quad_t)0)
295 * calculate the checksum for a tar block counting the checksum field as
296 * all blanks (BLNKSUM is that value pre-calculated, the sume of 8 blanks).
297 * NOTE: we use len to short circuit summing 0's on write since we ALWAYS
298 * pad headers with 0.
300 * unsigned long checksum
305 tar_chksm(register char *blk, register int len)
315 u_long chksm = BLNKSUM; /* inital value is checksum field sum */
318 * add the part of the block before the checksum field
321 stop = blk + CHK_OFFSET;
323 chksm += (u_long)(*pt++ & 0xff);
325 * move past the checksum field and keep going, spec counts the
326 * checksum field as the sum of 8 blanks (which is pre-computed as
328 * ASSUMED: len is greater than CHK_OFFSET. (len is where our 0 padding
329 * starts, no point in summing zero's)
334 chksm += (u_long)(*pt++ & 0xff);
339 * Routines for old BSD style tar (also made portable to sysV tar)
344 * determine if a block given to us is a valid tar header (and not a USTAR
345 * header). We have to be on the lookout for those pesky blocks of all
348 * 0 if a tar header, -1 otherwise
353 tar_id(register char *blk, int size)
362 register HD_USTAR *uhd;
367 uhd = (HD_USTAR *)blk;
370 * check for block of zero's first, a simple and fast test, then make
371 * sure this is not a ustar header by looking for the ustar magic
372 * cookie. We should use TMAGLEN, but some USTAR archive programs are
373 * wrong and create archives missing the \0. Last we check the
374 * checksum. If this is ok we have to assume it is a valid header.
376 if (hd->name[0] == '\0')
378 if (strncmp(uhd->magic, TMAGIC, TMAGLEN - 1) == 0)
380 if (asc_ul(hd->chksum,sizeof(hd->chksum),OCT) != tar_chksm(blk,BLKMULT))
387 * handle tar format specific -o options
389 * 0 if ok -1 otherwise
402 while ((opt = opt_next()) != NULL) {
403 if (strcmp(opt->name, TAR_OPTION) ||
404 strcmp(opt->value, TAR_NODIR)) {
405 paxwarn(1, "Unknown tar format -o option/value pair %s=%s",
406 opt->name, opt->value);
407 paxwarn(1,"%s=%s is the only supported tar format option",
408 TAR_OPTION, TAR_NODIR);
413 * we only support one option, and only when writing
415 if ((act != APPND) && (act != ARCHIVE)) {
416 paxwarn(1, "%s=%s is only supported when writing.",
417 opt->name, opt->value);
428 * extract the values out of block already determined to be a tar header.
429 * store the values in the ARCHD parameter.
436 tar_rd(register ARCHD *arcn, register char *buf)
440 register ARCHD *arcn;
448 * we only get proper sized buffers passed to us
450 if (tar_id(buf, BLKMULT) < 0)
452 arcn->org_name = arcn->name;
453 arcn->sb.st_nlink = 1;
457 * copy out the name and values in the stat buffer
460 arcn->nlen = l_strncpy(arcn->name, hd->name, sizeof(arcn->name) - 1);
461 arcn->name[arcn->nlen] = '\0';
462 arcn->sb.st_mode = (mode_t)(asc_ul(hd->mode,sizeof(hd->mode),OCT) &
464 arcn->sb.st_uid = (uid_t)asc_ul(hd->uid, sizeof(hd->uid), OCT);
465 arcn->sb.st_gid = (gid_t)asc_ul(hd->gid, sizeof(hd->gid), OCT);
466 arcn->sb.st_size = (size_t)asc_ul(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 caluculate 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) &
861 arcn->sb.st_size = (size_t)asc_ul(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 + 1))
1183 * we start looking at the biggest sized piece that fits in the name
1184 * field. We walk foward 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) (the -1 is correct the biggest piece would
1187 * include the slash between the two parts that gets thrown away)
1189 start = name + len - TNMSZ - 1;
1190 while ((*start != '\0') && (*start != '/'))
1194 * if we hit the end of the string, this name cannot be split, so we
1195 * cannot store this file.
1202 * NOTE: /str where the length of str == TNMSZ can not be stored under
1203 * the p1003.1-1990 spec for ustar. We could force a prefix of / and
1204 * the file would then expand on extract to //str. The len == 0 below
1205 * makes this special case follow the spec to the letter.
1207 if ((len > TPFSZ) || (len == 0))
1211 * ok have a split point, return it to the caller