bin/pax/ar_subs.c

80 static char hdbuf[BLKMULT];		/* space for archive header on read */
191  *	list the contents of an archive which match user supplied pattern(s)
204 	 * figure out archive type; pass any format specific options to the
205 	 * archive option processing routine; call the format init routine. We
217 	 * step through the archive until the format says it is done
268 		 * skip to next archive format header using values calculated
289  *	extract the member(s) of an archive as specified by user supplied
305 	 * figure out archive type; pass any format specific options to the
306 	 * archive option processing routine; call the format init routine;
321 	 * so we can fix up hard links files later in the archive.
327 	 * step through each entry on the archive until the format read routine
353 			 * archive member
365 		 * with -u or -D only extract when the archive member is newer
393 		 * this archive member is now been selected. modify the name.
458 			 * process archive members that are not regular files.
496 		 * extract the file from the archive and skip over padding and
532  *	Write an archive. used in both creating a new archive and appends on
533  *	previously written archive.
565 	 * so we can fix up hard links files later in the archive.
576 	 * while there are files to archive, process them one at at time
597 			 * only archive if this file is newer than a file with
598 			 * the same name that is already stored on the archive
618 			 * can avoid writing a header to the archive for a file
669 		 * routine write routine store the file header on the archive
690 		 * Add file data to the archive, quit on write error. if we
691 		 * cannot write the entire file contents to the archive we
692 		 * must pad the archive to replace the missing file data
735  *	Add file to previously written archive. Archive format specified by the
736  *	user must agree with archive. The archive is read first to collect
737  *	modification times (if -u) and locate the archive trailer. The archive
741  *	-u is implemented by adding the new members to the end of the archive.
743  *	version of the same file already stored in the archive. It is expected
745  *	ones stored "earlier" in the archive (this may be a bad assumption as
748  *	the entire archive (from the point were the old version was), or having
750  *	header that invalidates a previous archive record. The posix spec left
768 	 * Do not allow an append operation if the actual archive is of a
774 		tty_warn(1, "Cannot mix current archive format %s with %s",
793 	 * some archive formats encode hard links by recording the device and
795 	 * to the archive. When we append, we run the risk that newly added
797 	 * on the archive but during a previous run. If this happens, when the
798 	 * archive is extracted we get INCORRECT hard links. We avoid this by
800 	 * use the same device number as one found on the archive. remapping
803 	 * when the inode number is larger than storage space in the archive
810 	 * reading the archive may take a long time. If verbose tell the user
814 			"%s: Reading archive to position at the end...", argv0);
819 	 * step through the archive until the format says it is done
848 		 * device number seen in the old part of the archive to be
887 		 * not truncate the archive).
897  * archive()
898  *	write a new archive
902 archive(void)
908 	 * options write the archive
921  *	use any archive storage. The EFFECT OF THE COPY IS THE SAME as if an
922  *	archive was written and then extracted in the destination directory
977 	 * so we can fix up hard links files later in the archive.
988 	 * while there are files to archive, process them
1002 		 * archive.
1165  *	try to find a valid header in the archive. Uses format specific
1172  *	add a new byte from the archive to the end of the buffer and try again.
1211 			 * If we read 0 bytes (EOF) from an archive when we
1213 			 * an archive without the customary block of zeroes
1222 			 * some kind of archive read problem, try to resync the
1227 				    "Premature end of file on archive read");
1292 		 * time from the archive and place it at the end of the buffer.
1299 				    "Unable to append, archive header flaw");
1330  *	Figure out what format an archive is. Handles archive with flaws by
1335  *	0 if archive found -1 otherwise
1349 	 * find the smallest header size in all archive formats and then set up
1350 	 * to read the archive.
1398 		 * archive format. Look to see if we have a match. The array
1420 		 * We have a flawed archive, no match. we start searching, but
1433 		 * determine the nature of the flaw in the archive in a
1451 	tty_warn(1, "Sorry, unable to determine archive format.");