Beispiel #1
0
void
extract()
#endif
{
	register ARCHD *arcn;
	register int res;
	off_t cnt;
	ARCHD archd;
	struct stat sb;
	int fd;

	arcn = &archd;
	/*
	 * figure out archive type; pass any format specific options to the
	 * archive option processing routine; call the format init routine;
	 * start up the directory modification time and access mode database
	 */
	if ((get_arc() < 0) || ((*frmt->options)() < 0) ||
	    ((*frmt->st_rd)() < 0) || (dir_start() < 0))
		return;

	/*
	 * When we are doing interactive rename, we store the mapping of names
	 * so we can fix up hard links files later in the archive.
	 */
	if (iflag && (name_start() < 0))
		return;

	/*
	 * step through each entry on the archive until the format read routine
	 * says it is done
	 */
	while (next_head(arcn) == 0) {

		/*
		 * check for pattern, and user specified options match. When
		 * all the patterns are matched we are done
		 */
		if ((res = pat_match(arcn)) < 0)
			break;

		if ((res > 0) || (sel_chk(arcn) != 0)) {
			/*
			 * file is not selected. skip past any file data and
			 * padding and go back for the next archive member
			 */
			(void)rd_skip(arcn->skip + arcn->pad);
			continue;
		}

		/*
		 * with -u or -D only extract when the archive member is newer
		 * than the file with the same name in the file system (nos
		 * test of being the same type is required).
		 * NOTE: this test is done BEFORE name modifications as
		 * specified by pax. this operation can be confusing to the
		 * user who might expect the test to be done on an existing
		 * file AFTER the name mod. In honesty the pax spec is probably
		 * flawed in this respect.
		 */
		if ((uflag || Dflag) && ((lstat(arcn->name, &sb) == 0))) {
			if (uflag && Dflag) {
				if ((arcn->sb.st_mtime <= sb.st_mtime) &&
				    (arcn->sb.st_ctime <= sb.st_ctime)) {
					(void)rd_skip(arcn->skip + arcn->pad);
					continue;
				}
			} else if (Dflag) {
				if (arcn->sb.st_ctime <= sb.st_ctime) {
					(void)rd_skip(arcn->skip + arcn->pad);
					continue;
				}
			} else if (arcn->sb.st_mtime <= sb.st_mtime) {
				(void)rd_skip(arcn->skip + arcn->pad);
				continue;
			}
		}

		/*
		 * this archive member is now been selected. modify the name.
		 */
		if ((pat_sel(arcn) < 0) || ((res = mod_name(arcn)) < 0))
			break;
		if (res > 0) {
			/*
			 * a bad name mod, skip and purge name from link table
			 */
			purg_lnk(arcn);
			(void)rd_skip(arcn->skip + arcn->pad);
			continue;
		}

		/*
		 * Non standard -Y and -Z flag. When the exisiting file is
		 * same age or newer skip
		 */
		if ((Yflag || Zflag) && ((lstat(arcn->name, &sb) == 0))) {
			if (Yflag && Zflag) {
				if ((arcn->sb.st_mtime <= sb.st_mtime) &&
				    (arcn->sb.st_ctime <= sb.st_ctime)) {
					(void)rd_skip(arcn->skip + arcn->pad);
					continue;
				}
			} else if (Yflag) {
				if (arcn->sb.st_ctime <= sb.st_ctime) {
					(void)rd_skip(arcn->skip + arcn->pad);
					continue;
				}
			} else if (arcn->sb.st_mtime <= sb.st_mtime) {
				(void)rd_skip(arcn->skip + arcn->pad);
				continue;
			}
		}

		if (vflag) {
			(void)fputs(arcn->name, stderr);
			vfpart = 1;
		}

		/*
		 * all ok, extract this member based on type
		 */
		if ((arcn->type != PAX_REG) && (arcn->type != PAX_CTG)) {
			/*
			 * process archive members that are not regular files.
			 * throw out padding and any data that might follow the
			 * header (as determined by the format).
			 */
			if ((arcn->type == PAX_HLK) || (arcn->type == PAX_HRG))
				res = lnk_creat(arcn);
			else
				res = node_creat(arcn);

			(void)rd_skip(arcn->skip + arcn->pad);
			if (res < 0)
				purg_lnk(arcn);

			if (vflag && vfpart) {
				(void)putc('\n', stderr);
				vfpart = 0;
			}
			continue;
		}
		/*
		 * we have a file with data here. If we can not create it, skip
		 * over the data and purge the name from hard link table
		 */
		if ((fd = file_creat(arcn)) < 0) {
			(void)rd_skip(arcn->skip + arcn->pad);
			purg_lnk(arcn);
			continue;
		}
		/*
		 * extract the file from the archive and skip over padding and
		 * any unprocessed data
		 */
		res = (*frmt->rd_data)(arcn, fd, &cnt);
		file_close(arcn, fd);
		if (vflag && vfpart) {
			(void)putc('\n', stderr);
			vfpart = 0;
		}
		if (!res)
			(void)rd_skip(cnt + arcn->pad);
	}

	/*
	 * all done, restore directory modes and times as required; make sure
	 * all patterns supplied by the user were matched; block off signals
	 * to avoid chance for multiple entry into the cleanup code.
	 */
	(void)(*frmt->end_rd)();
	(void)sigprocmask(SIG_BLOCK, &s_mask, (sigset_t *)NULL);
	ar_close();
	proc_dir();
	pat_chk();
}
Beispiel #2
0
static int
wr_archive(ARCHD *arcn, int is_app)
{
	int res;
	int hlk;
	int wr_one;
	off_t cnt;
	int (*wrf)(ARCHD *);
	int fd = -1;
	time_t now;

	/*
	 * if this format supports hard link storage, start up the database
	 * that detects them.
	 */
	if (((hlk = frmt->hlk) == 1) && (lnk_start() < 0))
		return 1;

	/*
	 * start up the file traversal code and format specific write
	 */
	if ((ftree_start() < 0) || ((*frmt->st_wr)() < 0))
		return 1;
	wrf = frmt->wr;

	now = time((time_t *)NULL);

	/*
	 * When we are doing interactive rename, we store the mapping of names
	 * so we can fix up hard links files later in the archive.
	 */
	if (iflag && (name_start() < 0))
		return 1;

	/*
	 * if this is not append, and there are no files, we do no write a trailer
	 */
	wr_one = is_app;

	/*
	 * while there are files to archive, process them one at at time
	 */
	while (next_file(arcn) == 0) {
		/*
		 * check if this file meets user specified options match.
		 */
		if (sel_chk(arcn) != 0)
			continue;
		/*
		 * Here we handle the exclusion -X gnu style patterns which
		 * are implemented like a pattern list. We don't modify the
		 * name as this will be done below again, and we don't want
		 * to double modify it.
		 */
		if ((res = mod_name(arcn, 0)) < 0)
			break;
		if (res == 1)
			continue;
		fd = -1;
		if (uflag) {
			/*
			 * only archive if this file is newer than a file with
			 * the same name that is already stored on the archive
			 */
			if ((res = chk_ftime(arcn)) < 0)
				break;
			if (res > 0)
				continue;
		}

		/*
		 * this file is considered selected now. see if this is a hard
		 * link to a file already stored
		 */
		ftree_sel(arcn);
		if (hlk && (chk_lnk(arcn) < 0))
			break;

		if ((arcn->type == PAX_REG) || (arcn->type == PAX_HRG) ||
		    (arcn->type == PAX_CTG)) {
			/*
			 * we will have to read this file. by opening it now we
			 * can avoid writing a header to the archive for a file
			 * we were later unable to read (we also purge it from
			 * the link table).
			 */
			if ((fd = open(arcn->org_name, O_RDONLY, 0)) < 0) {
				syswarn(1, errno, "Unable to open %s to read",
					arcn->org_name);
				purg_lnk(arcn);
				continue;
			}
		}

		/*
		 * Now modify the name as requested by the user
		 */
		if ((res = mod_name(arcn, RENM)) < 0) {
			/*
			 * name modification says to skip this file, close the
			 * file and purge link table entry
			 */
			rdfile_close(arcn, &fd);
			purg_lnk(arcn);
			break;
		}

		if (arcn->name[0] == '/' && !check_Aflag()) {
			memmove(arcn->name, arcn->name + 1, strlen(arcn->name));
		}

		if ((res > 0) || (docrc && (set_crc(arcn, fd) < 0))) {
			/*
			 * unable to obtain the crc we need, close the file,
			 * purge link table entry
			 */
			rdfile_close(arcn, &fd);
			purg_lnk(arcn);
			continue;
		}

		if (vflag) {
			if (vflag > 1)
				ls_list(arcn, now, listf);
			else {
				(void)safe_print(arcn->name, listf);
				vfpart = 1;
			}
		}
		++flcnt;

		/*
		 * looks safe to store the file, have the format specific
		 * routine write routine store the file header on the archive
		 */
		if ((res = (*wrf)(arcn)) < 0) {
			rdfile_close(arcn, &fd);
			break;
		}
		wr_one = 1;
		if (res > 0) {
			/*
			 * format write says no file data needs to be stored
			 * so we are done messing with this file
			 */
			if (vflag && vfpart) {
				(void)putc('\n', listf);
				vfpart = 0;
			}
			rdfile_close(arcn, &fd);
			continue;
		}

		/*
		 * Add file data to the archive, quit on write error. if we
		 * cannot write the entire file contents to the archive we
		 * must pad the archive to replace the missing file data
		 * (otherwise during an extract the file header for the file
		 * which FOLLOWS this one will not be where we expect it to
		 * be).
		 */
		res = (*frmt->wr_data)(arcn, fd, &cnt);
		rdfile_close(arcn, &fd);
		if (vflag && vfpart) {
			(void)putc('\n', listf);
			vfpart = 0;
		}
		if (res < 0)
			break;

		/*
		 * pad as required, cnt is number of bytes not written
		 */
		if (((cnt > 0) && (wr_skip(cnt) < 0)) ||
		    ((arcn->pad > 0) && (wr_skip(arcn->pad) < 0)))
			break;
	}

	/*
	 * tell format to write trailer; pad to block boundary; reset directory
	 * mode/access times, and check if all patterns supplied by the user
	 * were matched. block off signals to avoid chance for multiple entry
	 * into the cleanup code
	 */
	if (wr_one) {
		(*frmt->end_wr)();
		wr_fin();
	}
	(void)sigprocmask(SIG_BLOCK, &s_mask, (sigset_t *)NULL);
	ar_close();
	if (tflag)
		proc_dir();
	ftree_chk();

	return 0;
}
Beispiel #3
0
int
copy(void)
{
	ARCHD *arcn;
	int res;
	int fddest;
	char *dest_pt;
	int dlen;
	int drem;
	int fdsrc = -1;
	struct stat sb;
	char dirbuf[PAXPATHLEN+1];

	arcn = &archd;
	/*
	 * set up the destination dir path and make sure it is a directory. We
	 * make sure we have a trailing / on the destination
	 */
	dlen = strlcpy(dirbuf, dirptr, sizeof(dirbuf));
	if (dlen >= sizeof(dirbuf) ||
	    (dlen == sizeof(dirbuf) - 1 && dirbuf[dlen - 1] != '/')) {
		tty_warn(1, "directory name is too long %s", dirptr);
		return 1;
	}
	dest_pt = dirbuf + dlen;
	if (*(dest_pt-1) != '/') {
		*dest_pt++ = '/';
		++dlen;
	}
	*dest_pt = '\0';
	drem = PAXPATHLEN - dlen;

	if (stat(dirptr, &sb) < 0) {
		syswarn(1, errno, "Cannot access destination directory %s",
			dirptr);
		return 1;
	}
	if (!S_ISDIR(sb.st_mode)) {
		tty_warn(1, "Destination is not a directory %s", dirptr);
		return 1;
	}

	/*
	 * start up the hard link table; file traversal routines and the
	 * modification time and access mode database
	 */
	if ((lnk_start() < 0) || (ftree_start() < 0) || (dir_start() < 0))
		return 1;

	/*
	 * When we are doing interactive rename, we store the mapping of names
	 * so we can fix up hard links files later in the archive.
	 */
	if (iflag && (name_start() < 0))
		return 1;

	/*
	 * set up to cp file trees
	 */
	cp_start();

	/*
	 * while there are files to archive, process them
	 */
	while (next_file(arcn) == 0) {
		fdsrc = -1;

		/*
		 * check if this file meets user specified options
		 */
		if (sel_chk(arcn) != 0)
			continue;

		/*
		 * if there is already a file in the destination directory with
		 * the same name and it is newer, skip the one stored on the
		 * archive.
		 * NOTE: this test is done BEFORE name modifications as
		 * specified by pax. this can be confusing to the user who
		 * might expect the test to be done on an existing file AFTER
		 * the name mod. In honesty the pax spec is probably flawed in
		 * this respect
		 */
		if (uflag || Dflag) {
			/*
			 * create the destination name
			 */
			if (strlcpy(dest_pt, arcn->name + (*arcn->name == '/'),
			    drem + 1) > drem) {
				tty_warn(1, "Destination pathname too long %s",
					arcn->name);
				continue;
			}

			/*
			 * if existing file is same age or newer skip
			 */
			res = lstat(dirbuf, &sb);
			*dest_pt = '\0';

			if (res == 0) {
				if (uflag && Dflag) {
					if ((arcn->sb.st_mtime<=sb.st_mtime) &&
					    (arcn->sb.st_ctime<=sb.st_ctime))
						continue;
				} else if (Dflag) {
					if (arcn->sb.st_ctime <= sb.st_ctime)
						continue;
				} else if (arcn->sb.st_mtime <= sb.st_mtime)
					continue;
			}
		}

		/*
		 * this file is considered selected. See if this is a hard link
		 * to a previous file; modify the name as requested by the
		 * user; set the final destination.
		 */
		ftree_sel(arcn);
		if ((chk_lnk(arcn) < 0) || ((res = mod_name(arcn, RENM)) < 0))
			break;
		if ((res > 0) || (set_dest(arcn, dirbuf, dlen) < 0)) {
			/*
			 * skip file, purge from link table
			 */
			purg_lnk(arcn);
			continue;
		}

		/*
		 * Non standard -Y and -Z flag. When the exisiting file is
		 * same age or newer skip
		 */
		if ((Yflag || Zflag) && ((lstat(arcn->name, &sb) == 0))) {
			if (Yflag && Zflag) {
				if ((arcn->sb.st_mtime <= sb.st_mtime) &&
				    (arcn->sb.st_ctime <= sb.st_ctime))
					continue;
			} else if (Yflag) {
				if (arcn->sb.st_ctime <= sb.st_ctime)
					continue;
			} else if (arcn->sb.st_mtime <= sb.st_mtime)
				continue;
		}

		if (vflag) {
			(void)safe_print(arcn->name, listf);
			vfpart = 1;
		}
		++flcnt;

		/*
		 * try to create a hard link to the src file if requested
		 * but make sure we are not trying to overwrite ourselves.
		 */
		if (lflag)
			res = cross_lnk(arcn);
		else
			res = chk_same(arcn);
		if (res <= 0) {
			if (vflag && vfpart) {
				(void)putc('\n', listf);
				vfpart = 0;
			}
			continue;
		}

		/*
		 * have to create a new file
		 */
		if ((arcn->type != PAX_REG) && (arcn->type != PAX_CTG)) {
			/*
			 * create a link or special file
			 */
			if ((arcn->type == PAX_HLK) ||
			    (arcn->type == PAX_HRG)) {
				int payload;

				res = lnk_creat(arcn, &payload);
			} else {
				res = node_creat(arcn);
			}
			if (res < 0)
				purg_lnk(arcn);
			if (vflag && vfpart) {
				(void)putc('\n', listf);
				vfpart = 0;
			}
			continue;
		}

		/*
		 * have to copy a regular file to the destination directory.
		 * first open source file and then create the destination file
		 */
		if ((fdsrc = open(arcn->org_name, O_RDONLY, 0)) < 0) {
			syswarn(1, errno, "Unable to open %s to read",
			    arcn->org_name);
			purg_lnk(arcn);
			continue;
		}
		if ((fddest = file_creat(arcn, 0)) < 0) {
			rdfile_close(arcn, &fdsrc);
			purg_lnk(arcn);
			continue;
		}

		/*
		 * copy source file data to the destination file
		 */
		cp_file(arcn, fdsrc, fddest);
		file_close(arcn, fddest);
		rdfile_close(arcn, &fdsrc);

		if (vflag && vfpart) {
			(void)putc('\n', listf);
			vfpart = 0;
		}
	}

	/*
	 * restore directory modes and times as required; make sure all
	 * patterns were selected block off signals to avoid chance for
	 * multiple entry into the cleanup code.
	 */
	(void)sigprocmask(SIG_BLOCK, &s_mask, (sigset_t *)NULL);
	ar_close();
	proc_dir();
	ftree_chk();

	return 0;
}
Beispiel #4
0
int
extract(void)
{
	ARCHD *arcn;
	int res;
	off_t cnt;
	struct stat sb;
	int fd;
	time_t now;

	arcn = &archd;
	/*
	 * figure out archive type; pass any format specific options to the
	 * archive option processing routine; call the format init routine;
	 * start up the directory modification time and access mode database
	 */
	if ((get_arc() < 0) || ((*frmt->options)() < 0) ||
	    ((*frmt->st_rd)() < 0) || (dir_start() < 0))
		return 1;

	now = time((time_t *)NULL);
#if !HAVE_NBTOOL_CONFIG_H
	if (do_chroot)
		(void)fdochroot(cwdfd);
#endif

	/*
	 * When we are doing interactive rename, we store the mapping of names
	 * so we can fix up hard links files later in the archive.
	 */
	if (iflag && (name_start() < 0))
		return 1;

	/*
	 * step through each entry on the archive until the format read routine
	 * says it is done
	 */
	while (next_head(arcn) == 0) {
		int write_to_hard_link = 0;

		if (arcn->type == PAX_GLL || arcn->type == PAX_GLF) {
			/*
			 * we need to read, to get the real filename
			 */
			if (!(*frmt->rd_data)(arcn, -arcn->type, &cnt))
				(void)rd_skip(cnt + arcn->pad);
			continue;
		}

		/*
		 * check for pattern, and user specified options match. When
		 * all the patterns are matched we are done
		 */
		if ((res = pat_match(arcn)) < 0)
			break;

		if ((res > 0) || (sel_chk(arcn) != 0)) {
			/*
			 * file is not selected. skip past any file
			 * data and padding and go back for the next
			 * archive member
			 */
			(void)rd_skip(arcn->skip + arcn->pad);
			continue;
		}

		if (kflag && (lstat(arcn->name, &sb) == 0)) {
			(void)rd_skip(arcn->skip + arcn->pad);
			continue;
		}

		/*
		 * with -u or -D only extract when the archive member is newer
		 * than the file with the same name in the file system (no
		 * test of being the same type is required).
		 * NOTE: this test is done BEFORE name modifications as
		 * specified by pax. this operation can be confusing to the
		 * user who might expect the test to be done on an existing
		 * file AFTER the name mod. In honesty the pax spec is probably
		 * flawed in this respect.  ignore this for GNU long links.
		 */
		if ((uflag || Dflag) && ((lstat(arcn->name, &sb) == 0))) {
			if (uflag && Dflag) {
				if ((arcn->sb.st_mtime <= sb.st_mtime) &&
				    (arcn->sb.st_ctime <= sb.st_ctime)) {
					(void)rd_skip(arcn->skip + arcn->pad);
					continue;
				}
			} else if (Dflag) {
				if (arcn->sb.st_ctime <= sb.st_ctime) {
					(void)rd_skip(arcn->skip + arcn->pad);
					continue;
				}
			} else if (arcn->sb.st_mtime <= sb.st_mtime) {
				(void)rd_skip(arcn->skip + arcn->pad);
				continue;
			}
		}

		/*
		 * this archive member is now been selected. modify the name.
		 */
		if ((pat_sel(arcn) < 0) || ((res = mod_name(arcn, RENM)) < 0))
			break;
		if (res > 0) {
			/*
			 * a bad name mod, skip and purge name from link table
			 */
			purg_lnk(arcn);
			(void)rd_skip(arcn->skip + arcn->pad);
			continue;
		}

		if (arcn->name[0] == '/' && !check_Aflag()) {
			memmove(arcn->name, arcn->name + 1, strlen(arcn->name));
		}
		/*
		 * Non standard -Y and -Z flag. When the existing file is
		 * same age or newer skip; ignore this for GNU long links.
		 */
		if ((Yflag || Zflag) && ((lstat(arcn->name, &sb) == 0))) {
			if (Yflag && Zflag) {
				if ((arcn->sb.st_mtime <= sb.st_mtime) &&
				    (arcn->sb.st_ctime <= sb.st_ctime)) {
					(void)rd_skip(arcn->skip + arcn->pad);
					continue;
				}
			} else if (Yflag) {
				if (arcn->sb.st_ctime <= sb.st_ctime) {
					(void)rd_skip(arcn->skip + arcn->pad);
					continue;
				}
			} else if (arcn->sb.st_mtime <= sb.st_mtime) {
				(void)rd_skip(arcn->skip + arcn->pad);
				continue;
			}
		}

		if (vflag) {
			if (vflag > 1)
				ls_list(arcn, now, listf);
			else {
				(void)safe_print(arcn->name, listf);
				vfpart = 1;
			}
		}

		/*
		 * if required, chdir around.
		 */
		if ((arcn->pat != NULL) && (arcn->pat->chdname != NULL) &&
		    !to_stdout)
			dochdir(arcn->pat->chdname);

		if (secure && path_check(arcn, 0) != 0) {
			(void)rd_skip(arcn->skip + arcn->pad);
			continue;
		}

			
		/*
		 * all ok, extract this member based on type
		 */
		if ((arcn->type != PAX_REG) && (arcn->type != PAX_CTG)) {
			/*
			 * process archive members that are not regular files.
			 * throw out padding and any data that might follow the
			 * header (as determined by the format).
			 */
			if ((arcn->type == PAX_HLK) ||
			    (arcn->type == PAX_HRG))
				res = lnk_creat(arcn, &write_to_hard_link);
			else
				res = node_creat(arcn);

			if (!write_to_hard_link) {
				(void)rd_skip(arcn->skip + arcn->pad);
				if (res < 0)
					purg_lnk(arcn);

				if (vflag && vfpart) {
					(void)putc('\n', listf);
					vfpart = 0;
				}
				continue;
			}
		}
		if (to_stdout)
			fd = STDOUT_FILENO;
		else {
			/*
			 * We have a file with data here. If we cannot create
			 * it, skip over the data and purge the name from hard
			 * link table.
			 */
			if ((fd = file_creat(arcn, write_to_hard_link)) < 0) {
				(void)fflush(listf);
				(void)rd_skip(arcn->skip + arcn->pad);
				purg_lnk(arcn);
				continue;
			}
		}
		/*
		 * extract the file from the archive and skip over padding and
		 * any unprocessed data
		 */
		res = (*frmt->rd_data)(arcn, fd, &cnt);
		if (!to_stdout)
			file_close(arcn, fd);
		if (vflag && vfpart) {
			(void)putc('\n', listf);
			vfpart = 0;
		}
		if (!res)
			(void)rd_skip(cnt + arcn->pad);

		/*
		 * if required, chdir around.
		 */
		if ((arcn->pat != NULL) && (arcn->pat->chdname != NULL))
			fdochdir(cwdfd);
	}

	/*
	 * all done, restore directory modes and times as required; make sure
	 * all patterns supplied by the user were matched; block off signals
	 * to avoid chance for multiple entry into the cleanup code.
	 */
	(void)(*frmt->end_rd)();
	(void)sigprocmask(SIG_BLOCK, &s_mask, (sigset_t *)NULL);
	ar_close();
	proc_dir();
	pat_chk();

	return 0;
}