]>
Dogcows Code - chaz/tar/blob - src/create.c
1 /* Create a tar archive.
2 Copyright (C) 1985, 1992 Free Software Foundation
4 This file is part of GNU Tar.
6 GNU Tar is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU Tar is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU Tar; see the file COPYING. If not, write to
18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
21 * Create a tar archive.
23 * Written 25 Aug 1985 by John Gilmore, ihnp4!hoptoad!gnu.
29 #include <sys/types.h>
52 #if defined (_POSIX_VERSION)
62 #if defined(_POSIX_VERSION) || defined(DIRENT)
68 #define DP_NAMELEN(x) strlen((x)->d_name)
69 #endif /* _POSIX_VERSION or DIRENT */
70 #if !defined(_POSIX_VERSION) && !defined(DIRENT) && defined(BSD42)
72 #define DP_NAMELEN(x) (x)->d_namlen
73 #endif /* not _POSIX_VERSION and BSD42 */
76 #define DP_NAMELEN(x) (x)->d_namlen
79 #if defined(USG) && !defined(_POSIX_VERSION) && !defined(DIRENT)
81 #define DP_NAMELEN(x) strlen((x)->d_name)
82 #endif /* USG and not _POSIX_VERSION and not DIRENT */
84 extern struct stat hstat
; /* Stat struct corresponding */
92 extern struct name
*gnu_list_name
;
95 * If there are no symbolic links, there is no lstat(). Use stat().
101 extern void print_header();
103 union record
*start_header();
104 void blank_name_list();
109 void close_archive();
110 void collect_and_sort_names();
112 int deal_with_sparse();
113 void find_new_file_size();
114 void finish_header();
115 int finish_sparse_file();
118 int is_dot_or_dotdot();
124 void write_dir_file();
128 /* This code moved from tar.h since create.c is the only file that cares
129 about 'struct link's. This means that other files might not have to
130 include sys/types.h any more. */
140 struct link
*linklist
; /* Points to first link in list */
142 static nolinks
; /* Gets set if we run out of RAM */
145 * "Scratch" space to store the information about a sparse file before
146 * writing the info into the header or extended header
148 /* struct sp_array *sparsearray;*/
150 /* number of elts storable in the sparsearray */
151 /*int sparse_array_size = 10;*/
157 char *name_from_list();
159 open_archive(0); /* Open for writing */
162 char *buf
= ck_malloc(PATH_MAX
);
165 collect_and_sort_names();
167 while(p
=name_from_list())
169 /* if(!f_dironly) { */
171 while(p
=name_from_list()) {
173 if(p
[strlen(p
)-1]!='/')
175 bufp
=buf
+strlen(buf
);
176 for(q
=gnu_list_name
->dir_contents
;q
&& *q
;q
+=strlen(q
)+1) {
179 dump_file(buf
,-1, 1);
189 while (p
= name_next(1));
200 * Dump a single file. If it's a directory, recurse.
201 * Result is 1 for success, 0 for failure.
202 * Sets global "hstat" to stat() output for this file.
205 dump_file (p
, curdev
, toplevel
)
206 char *p
; /* File name to dump */
207 int curdev
; /* Device our parent dir was on */
208 int toplevel
; /* Whether we are a toplevel call */
210 union record
*header
;
212 extern char *save_name
; /* JF for multi-volume support */
213 extern long save_totsize
;
214 extern long save_sizeleft
;
217 extern time_t new_time
;
218 int critical_error
= 0;
219 struct utimbuf restore_times
;
220 /* int sparse_ind = 0;*/
223 if(f_confirm
&& !confirm("add",p
))
227 * Use stat if following (rather than dumping) 4.2BSD's
228 * symbolic links. Otherwise, use lstat (which, on non-4.2
229 * systems, is #define'd to stat anyway.
231 #ifdef STX_HIDDEN /* AIX */
232 if (0 != f_follow_links
?
233 statx (p
, &hstat
, STATSIZE
, STX_HIDDEN
):
234 statx (p
, &hstat
, STATSIZE
, STX_HIDDEN
|STX_LINK
))
236 if (0 != f_follow_links
? stat(p
, &hstat
): lstat(p
, &hstat
))
240 msg_perror("can't add file %s",p
);
242 if (!f_ignore_failed_read
|| critical_error
)
247 restore_times
.actime
= hstat
.st_atime
;
248 restore_times
.modtime
= hstat
.st_mtime
;
251 if (S_ISHIDDEN (hstat
.st_mode
)) {
252 char *new = (char *)alloca (strlen (p
) + 2);
261 /* See if we only want new files, and check if this one is too old to
262 put in the archive. */
265 && new_time
>hstat
.st_mtime
266 && !S_ISDIR(hstat
.st_mode
)
267 && (f_new_files
>1 || new_time
>hstat
.st_ctime
)) {
269 msg("%s: is unchanged; not dumped",p
);
275 /* See if we are trying to dump the archive */
276 if(ar_dev
&& hstat
.st_dev
==ar_dev
&& hstat
.st_ino
==ar_ino
) {
277 msg("%s is the archive; not dumped",p
);
282 * Check for multiple links.
284 * We maintain a list of all such files that we've written so
285 * far. Any time we see another, we check the list and
286 * avoid dumping the data again if we've done it once already.
288 if (hstat
.st_nlink
> 1
289 && (S_ISREG(hstat
.st_mode
)
291 || S_ISCTG(hstat
.st_mode
)
294 || S_ISCHR(hstat
.st_mode
)
297 || S_ISBLK(hstat
.st_mode
)
300 || S_ISFIFO(hstat
.st_mode
)
303 register struct link
*lp
;
305 /* First quick and dirty. Hashing, etc later FIXME */
306 for (lp
= linklist
; lp
; lp
= lp
->next
) {
307 if (lp
->ino
== hstat
.st_ino
&&
308 lp
->dev
== hstat
.st_dev
) {
309 char *link_name
= lp
->name
;
311 /* We found a link. */
312 while(!f_absolute_paths
&& *link_name
== '/') {
313 static int link_warn
= 0;
316 msg("Removing leading / from absolute links");
321 if (link_name
- lp
->name
>= NAMSIZ
)
322 write_long (link_name
, LF_LONGLINK
);
323 current_link_name
= link_name
;
326 header
= start_header(p
, &hstat
);
332 strncpy(header
->header
.arch_linkname
,
335 /* Force null truncated */
336 header
->header
.arch_linkname
[NAMSIZ
-1] = 0;
338 header
->header
.linkflag
= LF_LINK
;
339 finish_header(header
);
340 /* FIXME: Maybe remove from list after all links found? */
343 if (unlink (p
) == -1)
344 msg_perror ("cannot remove %s", p
);
346 return; /* We dumped it */
350 /* Not found. Add it to the list of possible links. */
351 lp
= (struct link
*)malloc((unsigned)(sizeof(struct link
)+strlen(p
)));
355 "no memory for links, they will be dumped as separate files");
359 lp
->ino
= hstat
.st_ino
;
360 lp
->dev
= hstat
.st_dev
;
367 * This is not a link to a previously dumped file, so dump it.
369 if (S_ISREG(hstat
.st_mode
)
371 || S_ISCTG(hstat
.st_mode
)
375 int f
; /* File descriptor */
378 register union record
*start
;
382 /* int end_nulls = 0; */
387 if (f_sparse_files
) {
389 * JK - This is the test for sparseness: whether the
390 * "size" of the file matches the number of blocks
391 * allocated for it. If there is a smaller number
392 * of blocks that would be necessary to accommodate
393 * a file of this size, we have a sparse file, i.e.,
394 * at least one of those records in the file is just
397 #ifdef hpux /* Nice of HPUX to gratuitiously change it, huh? - mib */
398 if (hstat
.st_size
- (hstat
.st_blocks
* 1024) > 1024 )
400 if (hstat
.st_size
- (hstat
.st_blocks
* RECORDSIZE
) > RECORDSIZE
)
403 int filesize
= hstat
.st_size
;
406 header
= start_header(p
, &hstat
);
412 header
->header
.linkflag
= LF_SPARSE
;
416 * Call the routine that figures out the
417 * layout of the sparse file in question.
418 * UPPERBOUND is the index of the last
419 * element of the "sparsearray," i.e.,
420 * the number of elements it needed to
424 upperbound
= deal_with_sparse(p
, header
);
427 * See if we'll need an extended header
430 if (upperbound
> SPARSE_IN_HDR
-1)
431 header
->header
.isextended
++;
433 * We store the "real" file size so
434 * we can show that in case someone wants
435 * to list the archive, i.e., tar tvf <file>.
436 * It might be kind of disconcerting if the
437 * shrunken file size was the one that showed
440 to_oct((long) hstat
.st_size
, 1+12,
441 header
->header
.realsize
);
444 * This will be the new "size" of the
445 * file, i.e., the size of the file
446 * minus the records of holes that we're
450 find_new_file_size(&filesize
, upperbound
);
451 hstat
.st_size
= filesize
;
452 to_oct((long) filesize
, 1+12,
453 header
->header
.size
);
454 /* to_oct((long) end_nulls, 1+12,
455 header->header.ending_blanks);*/
457 for (i
= 0; i
< SPARSE_IN_HDR
; i
++) {
458 if (!sparsearray
[i
].numbytes
)
460 to_oct(sparsearray
[i
].offset
, 1+12,
461 header
->header
.sp
[i
].offset
);
462 to_oct(sparsearray
[i
].numbytes
, 1+12,
463 header
->header
.sp
[i
].numbytes
);
469 upperbound
=SPARSE_IN_HDR
-1;
472 sizeleft
= hstat
.st_size
;
473 /* Don't bother opening empty, world readable files. */
474 if (sizeleft
> 0 || 0444 != (0444 & hstat
.st_mode
)) {
475 f
= open(p
, O_RDONLY
|O_BINARY
);
476 if (f
< 0) goto badperror
;
481 /* If the file is sparse, we've already taken care of this */
483 header
= start_header(p
, &hstat
);
484 if (header
== NULL
) {
492 /* Mark contiguous files, if we support them */
493 if (f_standard
&& S_ISCTG(hstat
.st_mode
)) {
494 header
->header
.linkflag
= LF_CONTIG
;
497 isextended
= header
->header
.isextended
;
498 save_linkflag
= header
->header
.linkflag
;
499 finish_header(header
);
503 /* register union record *exhdr;*/
504 /* int arraybound = SPARSE_EXT_HDR;*/
505 /* static */ int index_offset
= SPARSE_IN_HDR
;
507 extend
: exhdr
= findrec();
514 bzero(exhdr
->charptr
, RECORDSIZE
);
515 for (i
= 0; i
< SPARSE_EXT_HDR
; i
++) {
516 if (i
+index_offset
> upperbound
)
518 to_oct((long) sparsearray
[i
+index_offset
].numbytes
,
520 exhdr
->ext_hdr
.sp
[i
].numbytes
);
521 to_oct((long) sparsearray
[i
+index_offset
].offset
,
523 exhdr
->ext_hdr
.sp
[i
].offset
);
527 if (sum < upperbound)
529 if (index_offset
+i
< upperbound
) {
531 exhdr
->ext_hdr
.isextended
++;
536 if (save_linkflag
== LF_SPARSE
) {
537 if (finish_sparse_file(f
, &sizeleft
, hstat
.st_size
, p
))
541 while (sizeleft
> 0) {
545 save_sizeleft
= sizeleft
;
546 save_totsize
= hstat
.st_size
;
550 bufsize
= endofrecs()->charptr
- start
->charptr
;
552 if (sizeleft
< bufsize
) {
553 /* Last read -- zero out area beyond */
554 bufsize
= (int)sizeleft
;
555 count
= bufsize
% RECORDSIZE
;
557 bzero(start
->charptr
+ sizeleft
,
558 (int)(RECORDSIZE
- count
));
560 count
= read(f
, start
->charptr
, bufsize
);
562 msg_perror("read error at byte %ld, reading\
563 %d bytes, in file %s", hstat
.st_size
- sizeleft
, bufsize
,p
);
568 /* This is nonportable (the type of userec's arg). */
569 userec(start
+(count
-1)/RECORDSIZE
);
571 if (count
== bufsize
) continue;
572 msg( "file %s shrunk by %d bytes, padding with zeros.", p
, sizeleft
);
573 goto padit
; /* Short read */
584 if (unlink (p
) == -1)
585 msg_perror ("cannot remove %s", p
);
587 if (f_atime_preserve
)
588 utime (p
, &restore_times
);
592 * File shrunk or gave error, pad out tape to match
593 * the size we specified in the header.
597 save_sizeleft
=sizeleft
;
599 bzero(start
->charptr
,RECORDSIZE
);
601 sizeleft
-=RECORDSIZE
;
607 if (f_atime_preserve
)
608 utime (p
, &restore_times
);
613 else if(S_ISLNK(hstat
.st_mode
))
616 char *buf
= alloca (PATH_MAX
+ 1);
618 size
= readlink (p
, buf
, PATH_MAX
+ 1);
623 write_long (buf
, LF_LONGLINK
);
624 current_link_name
= buf
;
626 hstat
.st_size
= 0; /* Force 0 size on symlink */
627 header
= start_header(p
, &hstat
);
633 strncpy (header
->header
.arch_linkname
, buf
, NAMSIZ
);
634 header
->header
.arch_linkname
[NAMSIZ
- 1] = '\0';
635 header
->header
.linkflag
= LF_SYMLINK
;
636 finish_header(header
); /* Nothing more to do to it */
639 if (unlink (p
) == -1)
640 msg_perror ("cannot remove %s", p
);
646 else if (S_ISDIR(hstat
.st_mode
))
649 register struct direct
*d
;
653 int our_device
= hstat
.st_dev
;
655 /* Build new prototype name */
658 namebuf
=ck_malloc(buflen
+1);
659 strncpy(namebuf
, p
, buflen
);
660 while (len
>= 1 && '/' == namebuf
[len
-1])
661 len
--; /* Delete trailing slashes */
662 namebuf
[len
++] = '/'; /* Now add exactly one back */
663 namebuf
[len
] = '\0'; /* Make sure null-terminated */
666 * Output directory header record with permissions
667 * FIXME, do this AFTER files, to avoid R/O dir problems?
668 * If old archive format, don't write record at all.
671 hstat
.st_size
= 0; /* Force 0 size on dir */
673 * If people could really read standard archives,
674 * this should be: (FIXME)
675 header = start_header(f_standard? p: namebuf, &hstat);
676 * but since they'd interpret LF_DIR records as
677 * regular files, we'd better put the / on the name.
679 header
= start_header(namebuf
, &hstat
);
683 goto badfile
; /* eg name too long */
687 header
->header
.linkflag
= LF_DUMPDIR
;
689 header
->header
.linkflag
= LF_DIR
;
691 /* If we're gnudumping, we aren't done yet so don't close it. */
693 finish_header(header
); /* Done with directory header */
704 buf
=gnu_list_name
->dir_contents
; /* FOO */
706 for(p_buf
=buf
;p_buf
&& *p_buf
;) {
714 to_oct((long)totsize
,1+12,header
->header
.size
);
715 finish_header(header
);
721 save_sizeleft
=sizeleft
;
722 save_totsize
=totsize
;
725 bufsize
=endofrecs()->charptr
- start
->charptr
;
726 if(sizeleft
<bufsize
) {
728 count
=bufsize%RECORDSIZE
;
730 bzero(start
->charptr
+sizeleft
,RECORDSIZE
-count
);
732 bcopy(p_buf
,start
->charptr
,bufsize
);
735 userec(start
+(bufsize
-1)/RECORDSIZE
);
739 if (f_atime_preserve
)
740 utime (p
, &restore_times
);
744 /* Now output all the files in the directory */
747 return; /* Unless the cmdline said not to */
750 * See if we are crossing from one file system to another,
751 * and avoid doing so if the user only wants to dump one file system.
753 if (f_local_filesys
&& !toplevel
&& curdev
!= hstat
.st_dev
) {
755 msg("%s: is on a different filesystem; not dumped",p
);
764 msg_perror ("can't open directory %s",p
);
766 msg("error opening directory %s",
772 /* Hack to remove "./" from the front of all the file names */
773 if (len
== 2 && namebuf
[0] == '.' && namebuf
[1]=='/')
776 /* Should speed this up by cd-ing into the dir, FIXME */
777 while (NULL
!= (d
=readdir(dirp
))) {
779 if(is_dot_or_dotdot(d
->d_name
))
782 if (DP_NAMELEN(d
) + len
>= buflen
) {
783 buflen
=len
+DP_NAMELEN(d
);
784 namebuf
=ck_realloc(namebuf
,buflen
+1);
785 /* namebuf[len]='\0';
786 msg("file name %s%s too long",
790 strcpy(namebuf
+len
, d
->d_name
);
791 if(f_exclude
&& check_exclude(namebuf
))
793 dump_file(namebuf
, our_device
, 0);
798 if (f_atime_preserve
)
799 utime (p
, &restore_times
);
804 else if (S_ISCHR(hstat
.st_mode
)) {
810 else if (S_ISBLK(hstat
.st_mode
)) {
815 /* Avoid screwy apollo lossage where S_IFIFO == S_IFSOCK */
816 #if (_ISP__M68K == 0) && (_ISP__A88K == 0) && defined(S_ISFIFO)
817 else if (S_ISFIFO(hstat
.st_mode
)) {
823 else if (S_ISSOCK(hstat
.st_mode
)) {
830 if (!f_standard
) goto unknown
;
832 hstat
.st_size
= 0; /* Force 0 size */
833 header
= start_header(p
, &hstat
);
837 goto badfile
; /* eg name too long */
840 header
->header
.linkflag
= type
;
841 #if defined(S_IFBLK) || defined(S_IFCHR)
842 if (type
!= LF_FIFO
) {
843 to_oct((long) major(hstat
.st_rdev
), 8,
844 header
->header
.devmajor
);
845 to_oct((long) minor(hstat
.st_rdev
), 8,
846 header
->header
.devminor
);
850 finish_header(header
);
853 if (unlink (p
) == -1)
854 msg_perror ("cannot remove %s", p
);
859 msg("%s: Unknown file type; file ignored.", p
);
863 finish_sparse_file(fd
, sizeleft
, fullsize
, name
)
870 char tempbuf
[RECORDSIZE
];
878 while (*sizeleft
> 0) {
880 bzero(start
->charptr
, RECORDSIZE
);
881 bufsize
= sparsearray
[sparse_ind
].numbytes
;
882 if (!bufsize
) { /* we blew it, maybe */
883 msg("Wrote %ld of %ld bytes to file %s",
884 fullsize
- *sizeleft
, fullsize
, name
);
887 pos
= lseek(fd
, sparsearray
[sparse_ind
++].offset
, 0);
889 * If the number of bytes to be written here exceeds
890 * the size of the temporary buffer, do it in steps.
892 while (bufsize
> RECORDSIZE
) {
894 count = read(fd, start->charptr+amt_read, RECORDSIZE-amt_read);
895 bufsize -= RECORDSIZE - amt_read;
899 bzero(start->charptr, RECORDSIZE);
902 count
= read(fd
, start
->charptr
, RECORDSIZE
);
904 msg_perror("read error at byte %ld, reading %d bytes, in file %s",
905 fullsize
- *sizeleft
, bufsize
, name
);
911 nwritten
+= RECORDSIZE
; /* XXX */
913 bzero(start
->charptr
, RECORDSIZE
);
917 clear_buffer(tempbuf
);
918 count
= read(fd
, tempbuf
, bufsize
);
919 bcopy(tempbuf
, start
->charptr
, RECORDSIZE
);
921 msg_perror("read error at byte %ld, reading %d bytes, in file %s",
922 fullsize
- *sizeleft
, bufsize
, name
);
925 /* if (amt_read >= RECORDSIZE) {
927 userec(start+(count-1)/RECORDSIZE);
928 if (count != bufsize) {
929 msg("file %s shrunk by %d bytes, padding with zeros.", name, sizeleft);
934 amt_read += bufsize;*/
935 nwritten
+= count
; /* XXX */
941 /* printf ("Amount actually written is (I hope) %d.\n", nwritten); */
942 /* userec(start+(count-1)/RECORDSIZE);*/
954 * Make room for our scratch space -- initially is 10 elts long
956 sparsearray
= (struct sp_array
*) malloc(sp_array_size
* sizeof(struct sp_array
));
957 for (i
= 0; i
< sp_array_size
; i
++) {
958 sparsearray
[i
].offset
= 0;
959 sparsearray
[i
].numbytes
= 0;
966 * Okay, we've got a sparse file on our hands -- now, what we need to do is
967 * make a pass through the file and carefully note where any data is, i.e.,
968 * we want to find how far into the file each instance of data is, and how
969 * many bytes are there. We store this information in the sparsearray,
970 * which will later be translated into header information. For now, we use
971 * the sparsearray as convenient storage.
973 * As a side note, this routine is a mess. If I could have found a cleaner
974 * way to do it, I would have. If anyone wants to find a nicer way to do
978 /* There is little point in trimming small amounts of null data at the */
979 /* head and tail of blocks -- it's ok if we only avoid dumping blocks */
980 /* of complete null data */
982 deal_with_sparse(name
, header
, nulls_at_end
)
984 union record
*header
;
989 /* long save_offset;*/
991 /* int current_size = hstat.st_size;*/
994 char buf
[RECORDSIZE
];
996 int read_last_data
= 0; /* did we just read the last record? */
1000 header
->header
.isextended
= 0;
1002 * Can't open the file -- this problem will be caught later on,
1005 if ((fd
= open(name
, O_RDONLY
)) < 0)
1011 while ((cc
= read(fd
, buf
, sizeof buf
)) != 0) {
1013 if (sparse_ind
> sp_array_size
-1) {
1016 * realloc the scratch area, since we've run out of room --
1018 sparsearray
= (struct sp_array
*)
1019 realloc(sparsearray
,
1020 2 * sp_array_size
* (sizeof(struct sp_array
)));
1023 if (cc
== sizeof buf
) {
1024 if (zero_record(buf
)) {
1026 sparsearray
[sparse_ind
++].numbytes
1030 } else { /* !zero_record(buf) */
1036 sparsearray
[sparse_ind
].offset
1040 } else if (cc
< sizeof buf
) {
1041 /* This has to be the last bit of the file, so this */
1042 /* is somewhat shorter than the above. */
1043 if (!zero_record(buf
)) {
1047 sparsearray
[sparse_ind
].offset
1057 sparsearray
[sparse_ind
++].numbytes
= numbytes
;
1060 return sparse_ind
- 1;
1064 * Just zeroes out the buffer so we don't confuse ourselves with leftover
1073 for (i
= 0; i
< RECORDSIZE
; i
++)
1077 #if 0 /* I'm leaving this as a monument to Joy Kendall, who wrote it -mib */
1080 * This routine takes a character array, and tells where within that array
1081 * the data can be found. It skips over any zeros, and sets the first
1082 * non-zero point in the array to be the "start", and continues until it
1083 * finds non-data again, which is marked as the "end." This routine is
1084 * mainly for 1) seeing how far into a file we must lseek to data, given
1085 * that we have a sparse file, and 2) determining the "real size" of the
1086 * file, i.e., the number of bytes in the sparse file that are data, as
1087 * opposed to the zeros we are trying to skip.
1089 where_is_data(from
, to
, buffer
)
1095 register int save_to
= *to
;
1096 int amidst_data
= 0;
1103 if (*from
< 16) /* don't bother */
1105 /* keep going to make sure there isn't more real
1106 data in this record */
1107 while (i
< RECORDSIZE
) {
1115 else if (buffer
[i
]) {
1121 if (i
== RECORDSIZE
)
1129 /* Note that this routine is only called if zero_record returned true */
1130 #if 0 /* But we actually don't need it at all. */
1131 where_is_data (from
, to
, buffer
)
1137 for (fp
= buffer
; ! *fp
; fp
++)
1139 for (tp
= buffer
+ RECORDSIZE
- 1; ! *tp
; tp
--)
1141 *from
= fp
- buffer
;
1142 *to
= tp
- buffer
+ 1;
1149 * Takes a recordful of data and basically cruises through it to see if
1150 * it's made *entirely* of zeros, returning a 0 the instant it finds
1151 * something that is a non-zero, i.e., useful data.
1159 for (i
= 0; i
< RECORDSIZE
; i
++)
1160 if (buffer
[i
] != '\000')
1166 find_new_file_size(filesize
, highest_index
)
1173 for (i
= 0; sparsearray
[i
].numbytes
&& i
<= highest_index
; i
++)
1174 *filesize
+= sparsearray
[i
].numbytes
;
1178 * Make a header block for the file name whose stat info is st .
1179 * Return header pointer for success, NULL if the name is too long.
1182 start_header(name
, st
)
1184 register struct stat
*st
;
1186 register union record
*header
;
1188 if (strlen (name
) >= NAMSIZ
)
1189 write_long (name
, LF_LONGNAME
);
1191 header
= (union record
*) findrec();
1192 bzero(header
->charptr
, sizeof(*header
)); /* XXX speed up */
1195 * Check the file name and put it in the record.
1197 if(!f_absolute_paths
) {
1198 static int warned_once
= 0;
1203 msg("Removing drive spec from names in the archive");
1206 while ('/' == *name
) {
1207 name
++; /* Force relative path */
1209 msg("Removing leading / from absolute path names in the archive.");
1212 current_file_name
= name
;
1213 strncpy(header
->header
.arch_name
, name
, NAMSIZ
);
1214 header
->header
.arch_name
[NAMSIZ
-1] = '\0';
1216 to_oct((long) (st
->st_mode
& 07777),
1217 8, header
->header
.mode
);
1218 to_oct((long) st
->st_uid
, 8, header
->header
.uid
);
1219 to_oct((long) st
->st_gid
, 8, header
->header
.gid
);
1220 to_oct((long) st
->st_size
, 1+12, header
->header
.size
);
1221 to_oct((long) st
->st_mtime
, 1+12, header
->header
.mtime
);
1222 /* header->header.linkflag is left as null */
1224 to_oct((long) st
->st_atime
, 1+12, header
->header
.atime
);
1225 to_oct((long) st
->st_ctime
, 1+12, header
->header
.ctime
);
1229 /* Fill in new Unix Standard fields if desired. */
1231 header
->header
.linkflag
= LF_NORMAL
; /* New default */
1232 strcpy(header
->header
.magic
, TMAGIC
); /* Mark as Unix Std */
1233 finduname(header
->header
.uname
, st
->st_uid
);
1234 findgname(header
->header
.gname
, st
->st_gid
);
1241 * Finish off a filled-in header block and write it out.
1242 * We also print the file name and/or full info if verbose is on.
1245 finish_header(header
)
1246 register union record
*header
;
1248 register int i
, sum
;
1251 bcopy(CHKBLANKS
, header
->header
.chksum
, sizeof(header
->header
.chksum
));
1254 p
= header
->charptr
;
1255 for (i
= sizeof(*header
); --i
>= 0; ) {
1257 * We can't use unsigned char here because of old compilers,
1264 * Fill in the checksum field. It's formatted differently
1265 * from the other fields: it has [6] digits, a null, then a
1266 * space -- rather than digits, a space, then a null.
1267 * We use to_oct then write the null in over to_oct's space.
1268 * The final space is already there, from checksumming, and
1269 * to_oct doesn't modify it.
1271 * This is a fast way to do:
1272 * (void) sprintf(header->header.chksum, "%6o", sum);
1274 to_oct((long) sum
, 8, header
->header
.chksum
);
1275 header
->header
.chksum
[6] = '\0'; /* Zap the space */
1280 extern union record
*head
; /* Points to current tape header */
1281 extern int head_standard
; /* Tape header is in ANSI format */
1283 /* These globals are parameters to print_header, sigh */
1285 /* hstat is already set up */
1286 head_standard
= f_standard
;
1295 * Quick and dirty octal conversion.
1296 * Converts long "value" into a "digs"-digit field at "where",
1297 * including a trailing space and room for a null. "digs"==3 means
1298 * 1 digit, a space, and room for a null.
1300 * We assume the trailing null is already there and don't fill it in.
1301 * This fact is used by start_header and finish_header, so don't change it!
1303 * This should be equivalent to:
1304 * (void) sprintf(where, "%*lo ", digs-2, value);
1305 * except that sprintf fills in the trailing null and we don't.
1308 to_oct(value
, digs
, where
)
1309 register long value
;
1311 register char *where
;
1314 --digs
; /* Trailing null slot is left alone */
1315 where
[--digs
] = ' '; /* Put in the space, though */
1317 /* Produce the digits -- at least one */
1319 where
[--digs
] = '0' + (char)(value
& 7); /* one octal digit */
1321 } while (digs
> 0 && value
!= 0);
1323 /* Leading spaces, if necessary */
1325 where
[--digs
] = ' ';
1331 * Write the EOT record(s).
1332 * We actually zero at least one record, through the end of the block.
1333 * Old tar writes garbage after two zeroed records -- and PDtar used to.
1344 bufsize
= endofrecs()->charptr
- p
->charptr
;
1345 bzero(p
->charptr
, bufsize
);
1350 /* Write a LF_LONGLINK or LF_LONGNAME record. */
1351 write_long (p
, type
)
1355 int size
= strlen (p
) + 1;
1357 union record
*header
;
1361 bzero (&foo
, sizeof foo
);
1364 header
= start_header ("././@LongLink", &foo
);
1365 header
->header
.linkflag
= type
;
1366 finish_header (header
);
1368 header
= findrec ();
1370 bufsize
= endofrecs ()->charptr
- header
->charptr
;
1372 while (bufsize
< size
)
1374 bcopy (p
, header
->charptr
, bufsize
);
1377 userec (header
+ (bufsize
- 1)/RECORDSIZE
);
1378 header
= findrec ();
1379 bufsize
= endofrecs ()->charptr
- header
->charptr
;
1381 bcopy (p
, header
->charptr
, size
);
1382 bzero (header
->charptr
+ size
, bufsize
- size
);
1383 userec (header
+ (size
- 1)/RECORDSIZE
);
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