1421 lines
35 KiB
C
1421 lines
35 KiB
C
/* $NetBSD: tar.c,v 1.71 2013/01/24 17:43:44 christos Exp $ */
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/*-
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* Copyright (c) 1992 Keith Muller.
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Keith Muller of the University of California, San Diego.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if HAVE_NBTOOL_CONFIG_H
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#include "nbtool_config.h"
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#endif
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#include <sys/cdefs.h>
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#if !defined(lint)
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#if 0
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static char sccsid[] = "@(#)tar.c 8.2 (Berkeley) 4/18/94";
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#else
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__RCSID("$NetBSD: tar.c,v 1.71 2013/01/24 17:43:44 christos Exp $");
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#endif
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/time.h>
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#include <sys/stat.h>
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#include <sys/param.h>
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#include <ctype.h>
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#include <errno.h>
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#include <grp.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "pax.h"
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#include "extern.h"
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#include "tar.h"
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/*
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* Routines for reading, writing and header identify of various versions of tar
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*/
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static int expandname(char *, size_t, char **, size_t *, const char *, size_t);
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static void longlink(ARCHD *, int);
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static uint32_t tar_chksm(char *, int);
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static char *name_split(char *, int);
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static int u32_oct(uintmax_t, char *, int, int);
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static int umax_oct(uintmax_t, char *, int, int);
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static int tar_gnutar_exclude_one(const char *, size_t);
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static int check_sum(char *, size_t, char *, size_t, int);
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/*
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* Routines common to all versions of tar
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*/
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static int tar_nodir; /* do not write dirs under old tar */
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int is_gnutar; /* behave like gnu tar; enable gnu
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* extensions and skip end-of-volume
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* checks
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*/
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static int seen_gnu_warning; /* Have we warned yet? */
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static char *gnu_hack_string; /* ././@LongLink hackery */
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static int gnu_hack_len; /* len of gnu_hack_string */
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char *gnu_name_string; /* ././@LongLink hackery name */
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char *gnu_link_string; /* ././@LongLink hackery link */
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size_t gnu_name_length; /* ././@LongLink hackery name */
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size_t gnu_link_length; /* ././@LongLink hackery link */
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static int gnu_short_trailer; /* gnu short trailer */
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static const char LONG_LINK[] = "././@LongLink";
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#ifdef _PAX_
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char DEV_0[] = "/dev/rst0";
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char DEV_1[] = "/dev/rst1";
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char DEV_4[] = "/dev/rst4";
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char DEV_5[] = "/dev/rst5";
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char DEV_7[] = "/dev/rst7";
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char DEV_8[] = "/dev/rst8";
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#endif
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static int
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check_sum(char *hd, size_t hdlen, char *bl, size_t bllen, int quiet)
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{
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uint32_t hdck, blck;
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hdck = asc_u32(hd, hdlen, OCT);
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blck = tar_chksm(bl, bllen);
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if (hdck != blck) {
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if (!quiet)
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tty_warn(0, "Header checksum %o does not match %o",
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hdck, blck);
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return -1;
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}
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return 0;
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}
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/*
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* tar_endwr()
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* add the tar trailer of two null blocks
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* Return:
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* 0 if ok, -1 otherwise (what wr_skip returns)
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*/
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int
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tar_endwr(void)
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{
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return wr_skip((off_t)(NULLCNT * BLKMULT));
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}
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/*
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* tar_endrd()
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* no cleanup needed here, just return size of trailer (for append)
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* Return:
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* size of trailer BLKMULT
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*/
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off_t
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tar_endrd(void)
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{
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return (off_t)((gnu_short_trailer ? 1 : NULLCNT) * BLKMULT);
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}
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/*
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* tar_trail()
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* Called to determine if a header block is a valid trailer. We are passed
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* the block, the in_sync flag (which tells us we are in resync mode;
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* looking for a valid header), and cnt (which starts at zero) which is
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* used to count the number of empty blocks we have seen so far.
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* Return:
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* 0 if a valid trailer, -1 if not a valid trailer, or 1 if the block
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* could never contain a header.
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*/
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int
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tar_trail(char *buf, int in_resync, int *cnt)
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{
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int i;
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gnu_short_trailer = 0;
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/*
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* look for all zero, trailer is two consecutive blocks of zero
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*/
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for (i = 0; i < BLKMULT; ++i) {
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if (buf[i] != '\0')
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break;
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}
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/*
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* if not all zero it is not a trailer, but MIGHT be a header.
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*/
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if (i != BLKMULT)
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return -1;
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/*
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* When given a zero block, we must be careful!
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* If we are not in resync mode, check for the trailer. Have to watch
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* out that we do not mis-identify file data as the trailer, so we do
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* NOT try to id a trailer during resync mode. During resync mode we
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* might as well throw this block out since a valid header can NEVER be
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* a block of all 0 (we must have a valid file name).
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*/
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if (!in_resync) {
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++*cnt;
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/*
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* old GNU tar (up through 1.13) only writes one block of
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* trailers, so we pretend we got another
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*/
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if (is_gnutar) {
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gnu_short_trailer = 1;
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++*cnt;
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}
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if (*cnt >= NULLCNT)
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return 0;
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}
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return 1;
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}
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/*
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* u32_oct()
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* convert an uintmax_t to an octal string. many oddball field
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* termination characters are used by the various versions of tar in the
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* different fields. term selects which kind to use. str is '0' padded
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* at the front to len. we are unable to use only one format as many old
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* tar readers are very cranky about this.
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* Return:
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* 0 if the number fit into the string, -1 otherwise
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*/
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static int
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u32_oct(uintmax_t val, char *str, int len, int term)
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{
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char *pt;
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uint64_t p;
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p = val & TOP_HALF;
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if (p && p != TOP_HALF)
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return -1;
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val &= BOTTOM_HALF;
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/*
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* term selects the appropriate character(s) for the end of the string
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*/
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pt = str + len - 1;
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switch(term) {
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case 3:
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*pt-- = '\0';
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break;
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case 2:
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*pt-- = ' ';
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*pt-- = '\0';
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break;
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case 1:
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*pt-- = ' ';
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break;
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case 0:
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default:
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*pt-- = '\0';
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*pt-- = ' ';
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break;
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}
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/*
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* convert and blank pad if there is space
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*/
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while (pt >= str) {
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*pt-- = '0' + (char)(val & 0x7);
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if ((val = val >> 3) == 0)
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break;
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}
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while (pt >= str)
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*pt-- = '0';
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if (val != 0)
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return -1;
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return 0;
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}
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/*
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* umax_oct()
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* convert an unsigned long long to an octal string. one of many oddball
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* field termination characters are used by the various versions of tar
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* in the different fields. term selects which kind to use. str is '0'
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* padded at the front to len. we are unable to use only one format as
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* many old tar readers are very cranky about this.
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* Return:
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* 0 if the number fit into the string, -1 otherwise
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*/
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static int
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umax_oct(uintmax_t val, char *str, int len, int term)
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{
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char *pt;
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/*
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* term selects the appropriate character(s) for the end of the string
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*/
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pt = str + len - 1;
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switch(term) {
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case 3:
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*pt-- = '\0';
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break;
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case 2:
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*pt-- = ' ';
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*pt-- = '\0';
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break;
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case 1:
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*pt-- = ' ';
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break;
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case 0:
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default:
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*pt-- = '\0';
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*pt-- = ' ';
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break;
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}
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/*
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* convert and blank pad if there is space
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*/
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while (pt >= str) {
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*pt-- = '0' + (char)(val & 0x7);
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if ((val = val >> 3) == 0)
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break;
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}
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while (pt >= str)
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*pt-- = '0';
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if (val != 0)
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return -1;
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return 0;
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}
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/*
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* tar_chksm()
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* calculate the checksum for a tar block counting the checksum field as
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* all blanks (BLNKSUM is that value pre-calculated, the sum of 8 blanks).
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* NOTE: we use len to short circuit summing 0's on write since we ALWAYS
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* pad headers with 0.
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* Return:
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* unsigned long checksum
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*/
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static uint32_t
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tar_chksm(char *blk, int len)
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{
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char *stop;
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char *pt;
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uint32_t chksm = BLNKSUM; /* initial value is checksum field sum */
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/*
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* add the part of the block before the checksum field
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*/
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pt = blk;
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stop = blk + CHK_OFFSET;
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while (pt < stop)
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chksm += (uint32_t)(*pt++ & 0xff);
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/*
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* move past the checksum field and keep going, spec counts the
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* checksum field as the sum of 8 blanks (which is pre-computed as
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* BLNKSUM).
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* ASSUMED: len is greater than CHK_OFFSET. (len is where our 0 padding
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* starts, no point in summing zero's)
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*/
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pt += CHK_LEN;
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stop = blk + len;
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while (pt < stop)
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chksm += (uint32_t)(*pt++ & 0xff);
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return chksm;
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}
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/*
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* Routines for old BSD style tar (also made portable to sysV tar)
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*/
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/*
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* tar_id()
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* determine if a block given to us is a valid tar header (and not a USTAR
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* header). We have to be on the lookout for those pesky blocks of all
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* zero's.
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* Return:
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* 0 if a tar header, -1 otherwise
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*/
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int
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tar_id(char *blk, int size)
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{
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HD_TAR *hd;
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HD_USTAR *uhd;
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static int is_ustar = -1;
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if (size < BLKMULT)
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return -1;
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hd = (HD_TAR *)blk;
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uhd = (HD_USTAR *)blk;
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/*
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* check for block of zero's first, a simple and fast test, then make
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* sure this is not a ustar header by looking for the ustar magic
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* cookie. We should use TMAGLEN, but some USTAR archive programs are
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* wrong and create archives missing the \0. Last we check the
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* checksum. If this is ok we have to assume it is a valid header.
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*/
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if (hd->name[0] == '\0')
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return -1;
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if (strncmp(uhd->magic, TMAGIC, TMAGLEN - 1) == 0) {
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if (is_ustar == -1) {
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is_ustar = 1;
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return -1;
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} else
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tty_warn(0,
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"Busted tar archive: has both ustar and old tar "
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"records");
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} else
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is_ustar = 0;
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return check_sum(hd->chksum, sizeof(hd->chksum), blk, BLKMULT, 1);
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}
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/*
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* tar_opt()
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* handle tar format specific -o options
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* Return:
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* 0 if ok -1 otherwise
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*/
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int
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tar_opt(void)
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{
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OPLIST *opt;
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while ((opt = opt_next()) != NULL) {
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if (strcmp(opt->name, TAR_OPTION) ||
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strcmp(opt->value, TAR_NODIR)) {
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tty_warn(1,
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"Unknown tar format -o option/value pair %s=%s",
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opt->name, opt->value);
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tty_warn(1,
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"%s=%s is the only supported tar format option",
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TAR_OPTION, TAR_NODIR);
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return -1;
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}
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/*
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* we only support one option, and only when writing
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*/
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if ((act != APPND) && (act != ARCHIVE)) {
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tty_warn(1, "%s=%s is only supported when writing.",
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opt->name, opt->value);
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return -1;
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}
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tar_nodir = 1;
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}
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return 0;
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}
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/*
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* tar_rd()
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* extract the values out of block already determined to be a tar header.
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* store the values in the ARCHD parameter.
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* Return:
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* 0
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*/
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int
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tar_rd(ARCHD *arcn, char *buf)
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{
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HD_TAR *hd;
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char *pt;
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/*
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* we only get proper sized buffers passed to us
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*/
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if (tar_id(buf, BLKMULT) < 0)
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return -1;
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memset(arcn, 0, sizeof(*arcn));
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arcn->org_name = arcn->name;
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arcn->pat = NULL;
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arcn->sb.st_nlink = 1;
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/*
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* copy out the name and values in the stat buffer
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*/
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hd = (HD_TAR *)buf;
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if (hd->linkflag != LONGLINKTYPE && hd->linkflag != LONGNAMETYPE) {
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arcn->nlen = expandname(arcn->name, sizeof(arcn->name),
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&gnu_name_string, &gnu_name_length, hd->name,
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sizeof(hd->name));
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arcn->ln_nlen = expandname(arcn->ln_name, sizeof(arcn->ln_name),
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&gnu_link_string, &gnu_link_length, hd->linkname,
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sizeof(hd->linkname));
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}
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arcn->sb.st_mode = (mode_t)(asc_u32(hd->mode,sizeof(hd->mode),OCT) &
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0xfff);
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arcn->sb.st_uid = (uid_t)asc_u32(hd->uid, sizeof(hd->uid), OCT);
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arcn->sb.st_gid = (gid_t)asc_u32(hd->gid, sizeof(hd->gid), OCT);
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arcn->sb.st_size = (off_t)ASC_OFFT(hd->size, sizeof(hd->size), OCT);
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arcn->sb.st_mtime = (time_t)(int32_t)asc_u32(hd->mtime, sizeof(hd->mtime), OCT);
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arcn->sb.st_ctime = arcn->sb.st_atime = arcn->sb.st_mtime;
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/*
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* have to look at the last character, it may be a '/' and that is used
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* to encode this as a directory
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*/
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pt = &(arcn->name[arcn->nlen - 1]);
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arcn->pad = 0;
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arcn->skip = 0;
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switch(hd->linkflag) {
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case SYMTYPE:
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/*
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* symbolic link, need to get the link name and set the type in
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* the st_mode so -v printing will look correct.
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*/
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arcn->type = PAX_SLK;
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arcn->sb.st_mode |= S_IFLNK;
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break;
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case LNKTYPE:
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/*
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* hard link, need to get the link name, set the type in the
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* st_mode and st_nlink so -v printing will look better.
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*/
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arcn->type = PAX_HLK;
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arcn->sb.st_nlink = 2;
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/*
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* no idea of what type this thing really points at, but
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* we set something for printing only.
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*/
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arcn->sb.st_mode |= S_IFREG;
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break;
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case LONGLINKTYPE:
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case LONGNAMETYPE:
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/*
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* GNU long link/file; we tag these here and let the
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* pax internals deal with it -- too ugly otherwise.
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*/
|
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if (hd->linkflag != LONGLINKTYPE)
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arcn->type = PAX_GLF;
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else
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arcn->type = PAX_GLL;
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arcn->pad = TAR_PAD(arcn->sb.st_size);
|
|
arcn->skip = arcn->sb.st_size;
|
|
break;
|
|
case AREGTYPE:
|
|
case REGTYPE:
|
|
case DIRTYPE: /* see below */
|
|
default:
|
|
/*
|
|
* If we have a trailing / this is a directory and NOT a file.
|
|
* Note: V7 tar doesn't actually have DIRTYPE, but it was
|
|
* reported that V7 archives using USTAR directories do exist.
|
|
*/
|
|
if (*pt == '/' || hd->linkflag == DIRTYPE) {
|
|
/*
|
|
* it is a directory, set the mode for -v printing
|
|
*/
|
|
arcn->type = PAX_DIR;
|
|
arcn->sb.st_mode |= S_IFDIR;
|
|
arcn->sb.st_nlink = 2;
|
|
} else {
|
|
/*
|
|
* have a file that will be followed by data. Set the
|
|
* skip value to the size field and calculate the size
|
|
* of the padding.
|
|
*/
|
|
arcn->type = PAX_REG;
|
|
arcn->sb.st_mode |= S_IFREG;
|
|
arcn->pad = TAR_PAD(arcn->sb.st_size);
|
|
arcn->skip = arcn->sb.st_size;
|
|
}
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* strip off any trailing slash.
|
|
*/
|
|
if (*pt == '/') {
|
|
*pt = '\0';
|
|
--arcn->nlen;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* tar_wr()
|
|
* write a tar header for the file specified in the ARCHD to the archive.
|
|
* Have to check for file types that cannot be stored and file names that
|
|
* are too long. Be careful of the term (last arg) to u32_oct, each field
|
|
* of tar has it own spec for the termination character(s).
|
|
* ASSUMED: space after header in header block is zero filled
|
|
* Return:
|
|
* 0 if file has data to be written after the header, 1 if file has NO
|
|
* data to write after the header, -1 if archive write failed
|
|
*/
|
|
|
|
int
|
|
tar_wr(ARCHD *arcn)
|
|
{
|
|
HD_TAR *hd;
|
|
int len;
|
|
char hdblk[sizeof(HD_TAR)];
|
|
|
|
/*
|
|
* check for those file system types which tar cannot store
|
|
*/
|
|
switch(arcn->type) {
|
|
case PAX_DIR:
|
|
/*
|
|
* user asked that dirs not be written to the archive
|
|
*/
|
|
if (tar_nodir)
|
|
return 1;
|
|
break;
|
|
case PAX_CHR:
|
|
tty_warn(1, "Tar cannot archive a character device %s",
|
|
arcn->org_name);
|
|
return 1;
|
|
case PAX_BLK:
|
|
tty_warn(1,
|
|
"Tar cannot archive a block device %s", arcn->org_name);
|
|
return 1;
|
|
case PAX_SCK:
|
|
tty_warn(1, "Tar cannot archive a socket %s", arcn->org_name);
|
|
return 1;
|
|
case PAX_FIF:
|
|
tty_warn(1, "Tar cannot archive a fifo %s", arcn->org_name);
|
|
return 1;
|
|
case PAX_SLK:
|
|
case PAX_HLK:
|
|
case PAX_HRG:
|
|
if (arcn->ln_nlen > (int)sizeof(hd->linkname)) {
|
|
tty_warn(1,"Link name too long for tar %s",
|
|
arcn->ln_name);
|
|
return 1;
|
|
}
|
|
break;
|
|
case PAX_REG:
|
|
case PAX_CTG:
|
|
default:
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* check file name len, remember extra char for dirs (the / at the end)
|
|
*/
|
|
len = arcn->nlen;
|
|
if (arcn->type == PAX_DIR)
|
|
++len;
|
|
if (len >= (int)sizeof(hd->name)) {
|
|
tty_warn(1, "File name too long for tar %s", arcn->name);
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* copy the data out of the ARCHD into the tar header based on the type
|
|
* of the file. Remember many tar readers want the unused fields to be
|
|
* padded with zero. We set the linkflag field (type), the linkname
|
|
* (or zero if not used),the size, and set the padding (if any) to be
|
|
* added after the file data (0 for all other types, as they only have
|
|
* a header)
|
|
*/
|
|
memset(hdblk, 0, sizeof(hdblk));
|
|
hd = (HD_TAR *)hdblk;
|
|
strlcpy(hd->name, arcn->name, sizeof(hd->name));
|
|
arcn->pad = 0;
|
|
|
|
if (arcn->type == PAX_DIR) {
|
|
/*
|
|
* directories are the same as files, except have a filename
|
|
* that ends with a /, we add the slash here. No data follows,
|
|
* dirs, so no pad.
|
|
*/
|
|
hd->linkflag = AREGTYPE;
|
|
hd->name[len-1] = '/';
|
|
if (u32_oct((uintmax_t)0L, hd->size, sizeof(hd->size), 1))
|
|
goto out;
|
|
} else if (arcn->type == PAX_SLK) {
|
|
/*
|
|
* no data follows this file, so no pad
|
|
*/
|
|
hd->linkflag = SYMTYPE;
|
|
strlcpy(hd->linkname, arcn->ln_name, sizeof(hd->linkname));
|
|
if (u32_oct((uintmax_t)0L, hd->size, sizeof(hd->size), 1))
|
|
goto out;
|
|
} else if ((arcn->type == PAX_HLK) || (arcn->type == PAX_HRG)) {
|
|
/*
|
|
* no data follows this file, so no pad
|
|
*/
|
|
hd->linkflag = LNKTYPE;
|
|
strlcpy(hd->linkname, arcn->ln_name, sizeof(hd->linkname));
|
|
if (u32_oct((uintmax_t)0L, hd->size, sizeof(hd->size), 1))
|
|
goto out;
|
|
} else {
|
|
/*
|
|
* data follows this file, so set the pad
|
|
*/
|
|
hd->linkflag = AREGTYPE;
|
|
if (OFFT_OCT(arcn->sb.st_size, hd->size, sizeof(hd->size), 1)) {
|
|
tty_warn(1,"File is too large for tar %s",
|
|
arcn->org_name);
|
|
return 1;
|
|
}
|
|
arcn->pad = TAR_PAD(arcn->sb.st_size);
|
|
}
|
|
|
|
/*
|
|
* copy those fields that are independent of the type
|
|
*/
|
|
if (u32_oct((uintmax_t)arcn->sb.st_mode, hd->mode, sizeof(hd->mode), 0) ||
|
|
u32_oct((uintmax_t)arcn->sb.st_uid, hd->uid, sizeof(hd->uid), 0) ||
|
|
u32_oct((uintmax_t)arcn->sb.st_gid, hd->gid, sizeof(hd->gid), 0) ||
|
|
u32_oct((uintmax_t)arcn->sb.st_mtime, hd->mtime, sizeof(hd->mtime), 1))
|
|
goto out;
|
|
|
|
/*
|
|
* calculate and add the checksum, then write the header. A return of
|
|
* 0 tells the caller to now write the file data, 1 says no data needs
|
|
* to be written
|
|
*/
|
|
if (u32_oct(tar_chksm(hdblk, sizeof(HD_TAR)), hd->chksum,
|
|
sizeof(hd->chksum), 3))
|
|
goto out; /* XXX Something's wrong here
|
|
* because a zero-byte file can
|
|
* cause this to be done and
|
|
* yet the resulting warning
|
|
* seems incorrect */
|
|
|
|
if (wr_rdbuf(hdblk, sizeof(HD_TAR)) < 0)
|
|
return -1;
|
|
if (wr_skip((off_t)(BLKMULT - sizeof(HD_TAR))) < 0)
|
|
return -1;
|
|
if ((arcn->type == PAX_CTG) || (arcn->type == PAX_REG))
|
|
return 0;
|
|
return 1;
|
|
|
|
out:
|
|
/*
|
|
* header field is out of range
|
|
*/
|
|
tty_warn(1, "Tar header field is too small for %s", arcn->org_name);
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Routines for POSIX ustar
|
|
*/
|
|
|
|
/*
|
|
* ustar_strd()
|
|
* initialization for ustar read
|
|
* Return:
|
|
* 0 if ok, -1 otherwise
|
|
*/
|
|
|
|
int
|
|
ustar_strd(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* ustar_stwr()
|
|
* initialization for ustar write
|
|
* Return:
|
|
* 0 if ok, -1 otherwise
|
|
*/
|
|
|
|
int
|
|
ustar_stwr(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* ustar_id()
|
|
* determine if a block given to us is a valid ustar header. We have to
|
|
* be on the lookout for those pesky blocks of all zero's
|
|
* Return:
|
|
* 0 if a ustar header, -1 otherwise
|
|
*/
|
|
|
|
int
|
|
ustar_id(char *blk, int size)
|
|
{
|
|
HD_USTAR *hd;
|
|
|
|
if (size < BLKMULT)
|
|
return -1;
|
|
hd = (HD_USTAR *)blk;
|
|
|
|
/*
|
|
* check for block of zero's first, a simple and fast test then check
|
|
* ustar magic cookie. We should use TMAGLEN, but some USTAR archive
|
|
* programs are fouled up and create archives missing the \0. Last we
|
|
* check the checksum. If ok we have to assume it is a valid header.
|
|
*/
|
|
if (hd->name[0] == '\0')
|
|
return -1;
|
|
if (strncmp(hd->magic, TMAGIC, TMAGLEN - 1) != 0)
|
|
return -1;
|
|
/* This is GNU tar */
|
|
if (strncmp(hd->magic, "ustar ", 8) == 0 && !is_gnutar &&
|
|
!seen_gnu_warning) {
|
|
seen_gnu_warning = 1;
|
|
tty_warn(0,
|
|
"Trying to read GNU tar archive with GNU extensions and end-of-volume checks off");
|
|
}
|
|
return check_sum(hd->chksum, sizeof(hd->chksum), blk, BLKMULT, 0);
|
|
}
|
|
|
|
/*
|
|
* ustar_rd()
|
|
* extract the values out of block already determined to be a ustar header.
|
|
* store the values in the ARCHD parameter.
|
|
* Return:
|
|
* 0
|
|
*/
|
|
|
|
int
|
|
ustar_rd(ARCHD *arcn, char *buf)
|
|
{
|
|
HD_USTAR *hd;
|
|
char *dest;
|
|
int cnt;
|
|
dev_t devmajor;
|
|
dev_t devminor;
|
|
|
|
/*
|
|
* we only get proper sized buffers
|
|
*/
|
|
if (ustar_id(buf, BLKMULT) < 0)
|
|
return -1;
|
|
|
|
memset(arcn, 0, sizeof(*arcn));
|
|
arcn->org_name = arcn->name;
|
|
arcn->pat = NULL;
|
|
arcn->sb.st_nlink = 1;
|
|
hd = (HD_USTAR *)buf;
|
|
|
|
/*
|
|
* see if the filename is split into two parts. if, so joint the parts.
|
|
* we copy the prefix first and add a / between the prefix and name.
|
|
*/
|
|
dest = arcn->name;
|
|
if (*(hd->prefix) != '\0') {
|
|
cnt = strlcpy(arcn->name, hd->prefix, sizeof(arcn->name));
|
|
dest += cnt;
|
|
*dest++ = '/';
|
|
cnt++;
|
|
} else {
|
|
cnt = 0;
|
|
}
|
|
|
|
if (hd->typeflag != LONGLINKTYPE && hd->typeflag != LONGNAMETYPE) {
|
|
arcn->nlen = expandname(dest, sizeof(arcn->name) - cnt,
|
|
&gnu_name_string, &gnu_name_length, hd->name,
|
|
sizeof(hd->name)) + cnt;
|
|
arcn->ln_nlen = expandname(arcn->ln_name,
|
|
sizeof(arcn->ln_name), &gnu_link_string, &gnu_link_length,
|
|
hd->linkname, sizeof(hd->linkname));
|
|
}
|
|
|
|
/*
|
|
* follow the spec to the letter. we should only have mode bits, strip
|
|
* off all other crud we may be passed.
|
|
*/
|
|
arcn->sb.st_mode = (mode_t)(asc_u32(hd->mode, sizeof(hd->mode), OCT) &
|
|
0xfff);
|
|
arcn->sb.st_size = (off_t)ASC_OFFT(hd->size, sizeof(hd->size), OCT);
|
|
arcn->sb.st_mtime = (time_t)(int32_t)asc_u32(hd->mtime, sizeof(hd->mtime), OCT);
|
|
arcn->sb.st_ctime = arcn->sb.st_atime = arcn->sb.st_mtime;
|
|
|
|
/*
|
|
* If we can find the ascii names for gname and uname in the password
|
|
* and group files we will use the uid's and gid they bind. Otherwise
|
|
* we use the uid and gid values stored in the header. (This is what
|
|
* the posix spec wants).
|
|
*/
|
|
hd->gname[sizeof(hd->gname) - 1] = '\0';
|
|
if (gid_from_group(hd->gname, &(arcn->sb.st_gid)) < 0)
|
|
arcn->sb.st_gid = (gid_t)asc_u32(hd->gid, sizeof(hd->gid), OCT);
|
|
hd->uname[sizeof(hd->uname) - 1] = '\0';
|
|
if (uid_from_user(hd->uname, &(arcn->sb.st_uid)) < 0)
|
|
arcn->sb.st_uid = (uid_t)asc_u32(hd->uid, sizeof(hd->uid), OCT);
|
|
|
|
/*
|
|
* set the defaults, these may be changed depending on the file type
|
|
*/
|
|
arcn->pad = 0;
|
|
arcn->skip = 0;
|
|
arcn->sb.st_rdev = (dev_t)0;
|
|
|
|
/*
|
|
* set the mode and PAX type according to the typeflag in the header
|
|
*/
|
|
switch(hd->typeflag) {
|
|
case FIFOTYPE:
|
|
arcn->type = PAX_FIF;
|
|
arcn->sb.st_mode |= S_IFIFO;
|
|
break;
|
|
case DIRTYPE:
|
|
arcn->type = PAX_DIR;
|
|
arcn->sb.st_mode |= S_IFDIR;
|
|
arcn->sb.st_nlink = 2;
|
|
|
|
/*
|
|
* Some programs that create ustar archives append a '/'
|
|
* to the pathname for directories. This clearly violates
|
|
* ustar specs, but we will silently strip it off anyway.
|
|
*/
|
|
if (arcn->name[arcn->nlen - 1] == '/')
|
|
arcn->name[--arcn->nlen] = '\0';
|
|
break;
|
|
case BLKTYPE:
|
|
case CHRTYPE:
|
|
/*
|
|
* this type requires the rdev field to be set.
|
|
*/
|
|
if (hd->typeflag == BLKTYPE) {
|
|
arcn->type = PAX_BLK;
|
|
arcn->sb.st_mode |= S_IFBLK;
|
|
} else {
|
|
arcn->type = PAX_CHR;
|
|
arcn->sb.st_mode |= S_IFCHR;
|
|
}
|
|
devmajor = (dev_t)asc_u32(hd->devmajor,sizeof(hd->devmajor),OCT);
|
|
devminor = (dev_t)asc_u32(hd->devminor,sizeof(hd->devminor),OCT);
|
|
arcn->sb.st_rdev = TODEV(devmajor, devminor);
|
|
break;
|
|
case SYMTYPE:
|
|
case LNKTYPE:
|
|
if (hd->typeflag == SYMTYPE) {
|
|
arcn->type = PAX_SLK;
|
|
arcn->sb.st_mode |= S_IFLNK;
|
|
} else {
|
|
arcn->type = PAX_HLK;
|
|
/*
|
|
* so printing looks better
|
|
*/
|
|
arcn->sb.st_mode |= S_IFREG;
|
|
arcn->sb.st_nlink = 2;
|
|
}
|
|
break;
|
|
case LONGLINKTYPE:
|
|
case LONGNAMETYPE:
|
|
if (is_gnutar) {
|
|
/*
|
|
* GNU long link/file; we tag these here and let the
|
|
* pax internals deal with it -- too ugly otherwise.
|
|
*/
|
|
if (hd->typeflag != LONGLINKTYPE)
|
|
arcn->type = PAX_GLF;
|
|
else
|
|
arcn->type = PAX_GLL;
|
|
arcn->pad = TAR_PAD(arcn->sb.st_size);
|
|
arcn->skip = arcn->sb.st_size;
|
|
} else {
|
|
tty_warn(1, "GNU Long %s found in posix ustar archive.",
|
|
hd->typeflag == LONGLINKTYPE ? "Link" : "File");
|
|
}
|
|
break;
|
|
case FILEXTYPE:
|
|
case GLOBXTYPE:
|
|
tty_warn(0, "%s extended headers posix ustar archive."
|
|
" Extracting as plain files. Following files might be"
|
|
" in the wrong directory or have wrong attributes.",
|
|
hd->typeflag == FILEXTYPE ? "File" : "Global");
|
|
/*FALLTHROUGH*/
|
|
case CONTTYPE:
|
|
case AREGTYPE:
|
|
case REGTYPE:
|
|
default:
|
|
/*
|
|
* these types have file data that follows. Set the skip and
|
|
* pad fields.
|
|
*/
|
|
arcn->type = PAX_REG;
|
|
arcn->pad = TAR_PAD(arcn->sb.st_size);
|
|
arcn->skip = arcn->sb.st_size;
|
|
arcn->sb.st_mode |= S_IFREG;
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
expandname(char *buf, size_t len, char **gnu_name, size_t *gnu_length,
|
|
const char *name, size_t nlen)
|
|
{
|
|
if (*gnu_name) {
|
|
len = strlcpy(buf, *gnu_name, len);
|
|
free(*gnu_name);
|
|
*gnu_name = NULL;
|
|
*gnu_length = 0;
|
|
} else {
|
|
if (len > ++nlen)
|
|
len = nlen;
|
|
len = strlcpy(buf, name, len);
|
|
}
|
|
return len;
|
|
}
|
|
|
|
static void
|
|
longlink(ARCHD *arcn, int type)
|
|
{
|
|
ARCHD larc;
|
|
|
|
(void)memset(&larc, 0, sizeof(larc));
|
|
|
|
larc.type = type;
|
|
larc.nlen = strlcpy(larc.name, LONG_LINK, sizeof(larc.name));
|
|
|
|
switch (type) {
|
|
case PAX_GLL:
|
|
gnu_hack_string = arcn->ln_name;
|
|
gnu_hack_len = arcn->ln_nlen + 1;
|
|
break;
|
|
case PAX_GLF:
|
|
gnu_hack_string = arcn->name;
|
|
gnu_hack_len = arcn->nlen + 1;
|
|
break;
|
|
default:
|
|
errx(1, "Invalid type in GNU longlink %d\n", type);
|
|
}
|
|
|
|
/*
|
|
* We need a longlink now.
|
|
*/
|
|
ustar_wr(&larc);
|
|
}
|
|
|
|
/*
|
|
* ustar_wr()
|
|
* write a ustar header for the file specified in the ARCHD to the archive
|
|
* Have to check for file types that cannot be stored and file names that
|
|
* are too long. Be careful of the term (last arg) to u32_oct, we only use
|
|
* '\0' for the termination character (this is different than picky tar)
|
|
* ASSUMED: space after header in header block is zero filled
|
|
* Return:
|
|
* 0 if file has data to be written after the header, 1 if file has NO
|
|
* data to write after the header, -1 if archive write failed
|
|
*/
|
|
|
|
static int
|
|
size_err(const char *what, ARCHD *arcn)
|
|
{
|
|
/*
|
|
* header field is out of range
|
|
*/
|
|
tty_warn(1, "Ustar %s header field is too small for %s",
|
|
what, arcn->org_name);
|
|
return 1;
|
|
}
|
|
|
|
int
|
|
ustar_wr(ARCHD *arcn)
|
|
{
|
|
HD_USTAR *hd;
|
|
char *pt;
|
|
char hdblk[sizeof(HD_USTAR)];
|
|
const char *user, *group;
|
|
|
|
switch (arcn->type) {
|
|
case PAX_SCK:
|
|
/*
|
|
* check for those file system types ustar cannot store
|
|
*/
|
|
if (!is_gnutar)
|
|
tty_warn(1, "Ustar cannot archive a socket %s",
|
|
arcn->org_name);
|
|
return 1;
|
|
|
|
case PAX_SLK:
|
|
case PAX_HLK:
|
|
case PAX_HRG:
|
|
/*
|
|
* check the length of the linkname
|
|
*/
|
|
if (arcn->ln_nlen >= (int)sizeof(hd->linkname)) {
|
|
if (is_gnutar) {
|
|
longlink(arcn, PAX_GLL);
|
|
} else {
|
|
tty_warn(1, "Link name too long for ustar %s",
|
|
arcn->ln_name);
|
|
return 1;
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* split the path name into prefix and name fields (if needed). if
|
|
* pt != arcn->name, the name has to be split
|
|
*/
|
|
if ((pt = name_split(arcn->name, arcn->nlen)) == NULL) {
|
|
if (is_gnutar) {
|
|
longlink(arcn, PAX_GLF);
|
|
pt = arcn->name;
|
|
} else {
|
|
tty_warn(1, "File name too long for ustar %s",
|
|
arcn->name);
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* zero out the header so we don't have to worry about zero fill below
|
|
*/
|
|
memset(hdblk, 0, sizeof(hdblk));
|
|
hd = (HD_USTAR *)hdblk;
|
|
arcn->pad = 0L;
|
|
|
|
/*
|
|
* split the name, or zero out the prefix
|
|
*/
|
|
if (pt != arcn->name) {
|
|
/*
|
|
* name was split, pt points at the / where the split is to
|
|
* occur, we remove the / and copy the first part to the prefix
|
|
*/
|
|
*pt = '\0';
|
|
strlcpy(hd->prefix, arcn->name, sizeof(hd->prefix));
|
|
*pt++ = '/';
|
|
}
|
|
|
|
/*
|
|
* copy the name part. this may be the whole path or the part after
|
|
* the prefix
|
|
*/
|
|
strlcpy(hd->name, pt, sizeof(hd->name));
|
|
|
|
/*
|
|
* set the fields in the header that are type dependent
|
|
*/
|
|
switch(arcn->type) {
|
|
case PAX_DIR:
|
|
hd->typeflag = DIRTYPE;
|
|
if (u32_oct((uintmax_t)0L, hd->size, sizeof(hd->size), 3))
|
|
return size_err("DIRTYPE", arcn);
|
|
break;
|
|
case PAX_CHR:
|
|
case PAX_BLK:
|
|
if (arcn->type == PAX_CHR)
|
|
hd->typeflag = CHRTYPE;
|
|
else
|
|
hd->typeflag = BLKTYPE;
|
|
if (u32_oct((uintmax_t)MAJOR(arcn->sb.st_rdev), hd->devmajor,
|
|
sizeof(hd->devmajor), 3) ||
|
|
u32_oct((uintmax_t)MINOR(arcn->sb.st_rdev), hd->devminor,
|
|
sizeof(hd->devminor), 3) ||
|
|
u32_oct((uintmax_t)0L, hd->size, sizeof(hd->size), 3))
|
|
return size_err("DEVTYPE", arcn);
|
|
break;
|
|
case PAX_FIF:
|
|
hd->typeflag = FIFOTYPE;
|
|
if (u32_oct((uintmax_t)0L, hd->size, sizeof(hd->size), 3))
|
|
return size_err("FIFOTYPE", arcn);
|
|
break;
|
|
case PAX_GLL:
|
|
case PAX_SLK:
|
|
case PAX_HLK:
|
|
case PAX_HRG:
|
|
if (arcn->type == PAX_SLK)
|
|
hd->typeflag = SYMTYPE;
|
|
else if (arcn->type == PAX_GLL)
|
|
hd->typeflag = LONGLINKTYPE;
|
|
else
|
|
hd->typeflag = LNKTYPE;
|
|
strlcpy(hd->linkname, arcn->ln_name, sizeof(hd->linkname));
|
|
if (u32_oct((uintmax_t)gnu_hack_len, hd->size,
|
|
sizeof(hd->size), 3))
|
|
return size_err("LINKTYPE", arcn);
|
|
break;
|
|
case PAX_GLF:
|
|
case PAX_REG:
|
|
case PAX_CTG:
|
|
default:
|
|
/*
|
|
* file data with this type, set the padding
|
|
*/
|
|
if (arcn->type == PAX_GLF) {
|
|
hd->typeflag = LONGNAMETYPE;
|
|
arcn->pad = TAR_PAD(gnu_hack_len);
|
|
if (OFFT_OCT((uint32_t)gnu_hack_len, hd->size,
|
|
sizeof(hd->size), 3)) {
|
|
tty_warn(1,"File is too long for ustar %s",
|
|
arcn->org_name);
|
|
return 1;
|
|
}
|
|
} else {
|
|
if (arcn->type == PAX_CTG)
|
|
hd->typeflag = CONTTYPE;
|
|
else
|
|
hd->typeflag = REGTYPE;
|
|
arcn->pad = TAR_PAD(arcn->sb.st_size);
|
|
if (OFFT_OCT(arcn->sb.st_size, hd->size,
|
|
sizeof(hd->size), 3)) {
|
|
tty_warn(1,"File is too long for ustar %s",
|
|
arcn->org_name);
|
|
return 1;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
|
|
strncpy(hd->magic, TMAGIC, TMAGLEN);
|
|
if (is_gnutar)
|
|
hd->magic[TMAGLEN - 1] = hd->version[0] = ' ';
|
|
else
|
|
strncpy(hd->version, TVERSION, TVERSLEN);
|
|
|
|
/*
|
|
* set the remaining fields. Some versions want all 16 bits of mode
|
|
* we better humor them (they really do not meet spec though)....
|
|
*/
|
|
if (u32_oct((uintmax_t)arcn->sb.st_mode, hd->mode, sizeof(hd->mode), 3))
|
|
return size_err("MODE", arcn);
|
|
if (u32_oct((uintmax_t)arcn->sb.st_uid, hd->uid, sizeof(hd->uid), 3))
|
|
return size_err("UID", arcn);
|
|
if (u32_oct((uintmax_t)arcn->sb.st_gid, hd->gid, sizeof(hd->gid), 3))
|
|
return size_err("GID", arcn);
|
|
if (u32_oct((uintmax_t)arcn->sb.st_mtime,hd->mtime,sizeof(hd->mtime),3))
|
|
return size_err("MTIME", arcn);
|
|
user = user_from_uid(arcn->sb.st_uid, 1);
|
|
group = group_from_gid(arcn->sb.st_gid, 1);
|
|
strncpy(hd->uname, user ? user : "", sizeof(hd->uname));
|
|
strncpy(hd->gname, group ? group : "", sizeof(hd->gname));
|
|
|
|
/*
|
|
* calculate and store the checksum write the header to the archive
|
|
* return 0 tells the caller to now write the file data, 1 says no data
|
|
* needs to be written
|
|
*/
|
|
if (u32_oct(tar_chksm(hdblk, sizeof(HD_USTAR)), hd->chksum,
|
|
sizeof(hd->chksum), 3))
|
|
return size_err("CHKSUM", arcn);
|
|
if (wr_rdbuf(hdblk, sizeof(HD_USTAR)) < 0)
|
|
return -1;
|
|
if (wr_skip((off_t)(BLKMULT - sizeof(HD_USTAR))) < 0)
|
|
return -1;
|
|
if (gnu_hack_string) {
|
|
int res = wr_rdbuf(gnu_hack_string, gnu_hack_len);
|
|
int pad = gnu_hack_len;
|
|
gnu_hack_string = NULL;
|
|
gnu_hack_len = 0;
|
|
if (res < 0)
|
|
return -1;
|
|
if (wr_skip((off_t)(BLKMULT - (pad % BLKMULT))) < 0)
|
|
return -1;
|
|
}
|
|
if ((arcn->type == PAX_CTG) || (arcn->type == PAX_REG))
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* name_split()
|
|
* see if the name has to be split for storage in a ustar header. We try
|
|
* to fit the entire name in the name field without splitting if we can.
|
|
* The split point is always at a /
|
|
* Return
|
|
* character pointer to split point (always the / that is to be removed
|
|
* if the split is not needed, the points is set to the start of the file
|
|
* name (it would violate the spec to split there). A NULL is returned if
|
|
* the file name is too long
|
|
*/
|
|
|
|
static char *
|
|
name_split(char *name, int len)
|
|
{
|
|
char *start;
|
|
|
|
/*
|
|
* check to see if the file name is small enough to fit in the name
|
|
* field. if so just return a pointer to the name.
|
|
*/
|
|
if (len < TNMSZ)
|
|
return name;
|
|
/*
|
|
* GNU tar does not honor the prefix+name mode if the magic
|
|
* is not "ustar\0". So in GNU tar compatibility mode, we don't
|
|
* split the filename into prefix+name because we are setting
|
|
* the magic to "ustar " as GNU tar does. This of course will
|
|
* end up creating a LongLink record in cases where it does not
|
|
* really need do, but we are behaving like GNU tar after all.
|
|
*/
|
|
if (is_gnutar || len > (TPFSZ + TNMSZ))
|
|
return NULL;
|
|
|
|
/*
|
|
* we start looking at the biggest sized piece that fits in the name
|
|
* field. We walk forward looking for a slash to split at. The idea is
|
|
* to find the biggest piece to fit in the name field (or the smallest
|
|
* prefix we can find) (the -1 is correct the biggest piece would
|
|
* include the slash between the two parts that gets thrown away)
|
|
*/
|
|
start = name + len - TNMSZ;
|
|
while ((*start != '\0') && (*start != '/'))
|
|
++start;
|
|
|
|
/*
|
|
* if we hit the end of the string, this name cannot be split, so we
|
|
* cannot store this file.
|
|
*/
|
|
if (*start == '\0')
|
|
return NULL;
|
|
len = start - name;
|
|
|
|
/*
|
|
* NOTE: /str where the length of str == TNMSZ cannot be stored under
|
|
* the p1003.1-1990 spec for ustar. We could force a prefix of / and
|
|
* the file would then expand on extract to //str. The len == 0 below
|
|
* makes this special case follow the spec to the letter.
|
|
*/
|
|
if ((len >= TPFSZ) || (len == 0))
|
|
return NULL;
|
|
|
|
/*
|
|
* ok have a split point, return it to the caller
|
|
*/
|
|
return start;
|
|
}
|
|
|
|
/*
|
|
* convert a glob into a RE, and add it to the list. we convert to
|
|
* four different RE's (because we're using BRE's and can't use |
|
|
* alternation :-() with this padding:
|
|
* .*\/ and $
|
|
* .*\/ and \/.*
|
|
* ^ and $
|
|
* ^ and \/.*
|
|
*/
|
|
static int
|
|
tar_gnutar_exclude_one(const char *line, size_t len)
|
|
{
|
|
/* 2 * buffer len + nul */
|
|
char sbuf[MAXPATHLEN * 2 + 1];
|
|
/* + / + // + .*""/\/ + \/.* */
|
|
char rabuf[MAXPATHLEN * 2 + 1 + 1 + 2 + 4 + 4];
|
|
size_t i;
|
|
int j = 0;
|
|
|
|
if (line[len - 1] == '\n')
|
|
len--;
|
|
for (i = 0; i < len; i++) {
|
|
/*
|
|
* convert glob to regexp, escaping everything
|
|
*/
|
|
if (line[i] == '*')
|
|
sbuf[j++] = '.';
|
|
else if (line[i] == '?') {
|
|
sbuf[j++] = '.';
|
|
continue;
|
|
} else if (!isalnum((unsigned char)line[i]) &&
|
|
!isblank((unsigned char)line[i]))
|
|
sbuf[j++] = '\\';
|
|
sbuf[j++] = line[i];
|
|
}
|
|
sbuf[j] = '\0';
|
|
/* don't need the .*\/ ones if we start with /, i guess */
|
|
if (line[0] != '/') {
|
|
(void)snprintf(rabuf, sizeof rabuf, "/.*\\/%s$//", sbuf);
|
|
if (rep_add(rabuf) < 0)
|
|
return (-1);
|
|
(void)snprintf(rabuf, sizeof rabuf, "/.*\\/%s\\/.*//", sbuf);
|
|
if (rep_add(rabuf) < 0)
|
|
return (-1);
|
|
}
|
|
|
|
(void)snprintf(rabuf, sizeof rabuf, "/^%s$//", sbuf);
|
|
if (rep_add(rabuf) < 0)
|
|
return (-1);
|
|
(void)snprintf(rabuf, sizeof rabuf, "/^%s\\/.*//", sbuf);
|
|
if (rep_add(rabuf) < 0)
|
|
return (-1);
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* deal with GNU tar -X/--exclude-from & --exclude switchs. basically,
|
|
* we go through each line of the file, building a string from the "glob"
|
|
* lines in the file into RE lines, of the form `/^RE$//', which we pass
|
|
* to rep_add(), which will add a empty replacement (exclusion), for the
|
|
* named files.
|
|
*/
|
|
int
|
|
tar_gnutar_minus_minus_exclude(const char *path)
|
|
{
|
|
size_t len = strlen(path);
|
|
|
|
if (len > MAXPATHLEN)
|
|
tty_warn(0, "pathname too long: %s", path);
|
|
|
|
return (tar_gnutar_exclude_one(path, len));
|
|
}
|
|
|
|
int
|
|
tar_gnutar_X_compat(const char *path)
|
|
{
|
|
char *line;
|
|
FILE *fp;
|
|
int lineno = 0;
|
|
size_t len;
|
|
|
|
if (path[0] == '-' && path[1] == '\0')
|
|
fp = stdin;
|
|
else {
|
|
fp = fopen(path, "r");
|
|
if (fp == NULL) {
|
|
tty_warn(1, "cannot open %s: %s", path,
|
|
strerror(errno));
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
while ((line = fgetln(fp, &len))) {
|
|
lineno++;
|
|
if (len > MAXPATHLEN) {
|
|
tty_warn(0, "pathname too long, line %d of %s",
|
|
lineno, path);
|
|
}
|
|
if (tar_gnutar_exclude_one(line, len))
|
|
return -1;
|
|
}
|
|
if (fp != stdin)
|
|
fclose(fp);
|
|
return 0;
|
|
}
|