fa07de5eeb
feedback, but the 2.5 branch is shaping up nicely.) In addition to many small bug fixes and code improvements: * Another iteration of versioning; I think I've got it right now. * Portability: A lot of progress on Windows support (though I'm not committing all of the Windows support files to FreeBSD CVS) * Explicit tracking of MBS, WCS, and UTF-8 versions of strings in archive_entry; the archive_entry routines now correctly return NULL only when something is unset, setting NULL properly clears string values. Most charset conversions have been pushed down to archive_string. * Better handling of charset conversion failure when writing or reading UTF-8 headers in pax archives * archive_entry_linkify() provides multiple strategies for hardlink matching to suit different format expectations * More accurate bzip2 format detection * Joerg Sonnenberger's extensive improvements to mtree support * Rough support for self-extracting ZIP archives. Not an ideal approach, but it works for the archives I've tried. * New "sparsify" option in archive_write_disk converts blocks of nulls into seeks. * Better default behavior for the test harness; it now reports all failures by default instead of coredumping at the first one.
1358 lines
40 KiB
C
1358 lines
40 KiB
C
/*-
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* Copyright (c) 2003-2007 Tim Kientzle
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* All rights reserved.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "archive_platform.h"
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__FBSDID("$FreeBSD$");
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#ifdef HAVE_ERRNO_H
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#include <errno.h>
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#endif
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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#ifdef HAVE_STRING_H
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#include <string.h>
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#endif
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#include "archive.h"
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#include "archive_entry.h"
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#include "archive_private.h"
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#include "archive_write_private.h"
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struct pax {
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uint64_t entry_bytes_remaining;
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uint64_t entry_padding;
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struct archive_string pax_header;
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};
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static void add_pax_attr(struct archive_string *, const char *key,
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const char *value);
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static void add_pax_attr_int(struct archive_string *,
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const char *key, int64_t value);
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static void add_pax_attr_time(struct archive_string *,
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const char *key, int64_t sec,
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unsigned long nanos);
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static void add_pax_attr_w(struct archive_string *,
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const char *key, const wchar_t *wvalue);
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static ssize_t archive_write_pax_data(struct archive_write *,
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const void *, size_t);
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static int archive_write_pax_finish(struct archive_write *);
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static int archive_write_pax_destroy(struct archive_write *);
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static int archive_write_pax_finish_entry(struct archive_write *);
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static int archive_write_pax_header(struct archive_write *,
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struct archive_entry *);
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static char *base64_encode(const char *src, size_t len);
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static char *build_pax_attribute_name(char *dest, const char *src);
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static char *build_ustar_entry_name(char *dest, const char *src,
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size_t src_length, const char *insert);
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static char *format_int(char *dest, int64_t);
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static int has_non_ASCII(const wchar_t *);
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static char *url_encode(const char *in);
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static int write_nulls(struct archive_write *, size_t);
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/*
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* Set output format to 'restricted pax' format.
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*
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* This is the same as normal 'pax', but tries to suppress
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* the pax header whenever possible. This is the default for
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* bsdtar, for instance.
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*/
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int
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archive_write_set_format_pax_restricted(struct archive *_a)
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{
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struct archive_write *a = (struct archive_write *)_a;
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int r;
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r = archive_write_set_format_pax(&a->archive);
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a->archive.archive_format = ARCHIVE_FORMAT_TAR_PAX_RESTRICTED;
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a->archive.archive_format_name = "restricted POSIX pax interchange";
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return (r);
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}
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/*
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* Set output format to 'pax' format.
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*/
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int
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archive_write_set_format_pax(struct archive *_a)
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{
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struct archive_write *a = (struct archive_write *)_a;
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struct pax *pax;
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if (a->format_destroy != NULL)
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(a->format_destroy)(a);
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pax = (struct pax *)malloc(sizeof(*pax));
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if (pax == NULL) {
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archive_set_error(&a->archive, ENOMEM, "Can't allocate pax data");
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return (ARCHIVE_FATAL);
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}
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memset(pax, 0, sizeof(*pax));
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a->format_data = pax;
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a->pad_uncompressed = 1;
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a->format_write_header = archive_write_pax_header;
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a->format_write_data = archive_write_pax_data;
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a->format_finish = archive_write_pax_finish;
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a->format_destroy = archive_write_pax_destroy;
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a->format_finish_entry = archive_write_pax_finish_entry;
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a->archive.archive_format = ARCHIVE_FORMAT_TAR_PAX_INTERCHANGE;
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a->archive.archive_format_name = "POSIX pax interchange";
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return (ARCHIVE_OK);
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}
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/*
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* Note: This code assumes that 'nanos' has the same sign as 'sec',
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* which implies that sec=-1, nanos=200000000 represents -1.2 seconds
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* and not -0.8 seconds. This is a pretty pedantic point, as we're
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* unlikely to encounter many real files created before Jan 1, 1970,
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* much less ones with timestamps recorded to sub-second resolution.
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*/
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static void
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add_pax_attr_time(struct archive_string *as, const char *key,
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int64_t sec, unsigned long nanos)
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{
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int digit, i;
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char *t;
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/*
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* Note that each byte contributes fewer than 3 base-10
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* digits, so this will always be big enough.
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*/
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char tmp[1 + 3*sizeof(sec) + 1 + 3*sizeof(nanos)];
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tmp[sizeof(tmp) - 1] = 0;
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t = tmp + sizeof(tmp) - 1;
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/* Skip trailing zeros in the fractional part. */
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for (digit = 0, i = 10; i > 0 && digit == 0; i--) {
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digit = nanos % 10;
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nanos /= 10;
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}
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/* Only format the fraction if it's non-zero. */
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if (i > 0) {
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while (i > 0) {
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*--t = "0123456789"[digit];
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digit = nanos % 10;
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nanos /= 10;
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i--;
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}
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*--t = '.';
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}
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t = format_int(t, sec);
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add_pax_attr(as, key, t);
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}
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static char *
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format_int(char *t, int64_t i)
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{
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int sign;
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if (i < 0) {
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sign = -1;
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i = -i;
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} else
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sign = 1;
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do {
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*--t = "0123456789"[i % 10];
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} while (i /= 10);
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if (sign < 0)
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*--t = '-';
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return (t);
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}
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static void
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add_pax_attr_int(struct archive_string *as, const char *key, int64_t value)
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{
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char tmp[1 + 3 * sizeof(value)];
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tmp[sizeof(tmp) - 1] = 0;
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add_pax_attr(as, key, format_int(tmp + sizeof(tmp) - 1, value));
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}
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static char *
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utf8_encode(const wchar_t *wval)
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{
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int utf8len;
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const wchar_t *wp;
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unsigned long wc;
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char *utf8_value, *p;
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utf8len = 0;
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for (wp = wval; *wp != L'\0'; ) {
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wc = *wp++;
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if (wc <= 0x7f)
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utf8len++;
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else if (wc <= 0x7ff)
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utf8len += 2;
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else if (wc <= 0xffff)
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utf8len += 3;
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else if (wc <= 0x1fffff)
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utf8len += 4;
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else if (wc <= 0x3ffffff)
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utf8len += 5;
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else if (wc <= 0x7fffffff)
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utf8len += 6;
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/* Ignore larger values; UTF-8 can't encode them. */
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}
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utf8_value = (char *)malloc(utf8len + 1);
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if (utf8_value == NULL) {
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__archive_errx(1, "Not enough memory for attributes");
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return (NULL);
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}
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for (wp = wval, p = utf8_value; *wp != L'\0'; ) {
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wc = *wp++;
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if (wc <= 0x7f) {
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*p++ = (char)wc;
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} else if (wc <= 0x7ff) {
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p[0] = 0xc0 | ((wc >> 6) & 0x1f);
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p[1] = 0x80 | (wc & 0x3f);
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p += 2;
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} else if (wc <= 0xffff) {
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p[0] = 0xe0 | ((wc >> 12) & 0x0f);
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p[1] = 0x80 | ((wc >> 6) & 0x3f);
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p[2] = 0x80 | (wc & 0x3f);
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p += 3;
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} else if (wc <= 0x1fffff) {
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p[0] = 0xf0 | ((wc >> 18) & 0x07);
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p[1] = 0x80 | ((wc >> 12) & 0x3f);
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p[2] = 0x80 | ((wc >> 6) & 0x3f);
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p[3] = 0x80 | (wc & 0x3f);
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p += 4;
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} else if (wc <= 0x3ffffff) {
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p[0] = 0xf8 | ((wc >> 24) & 0x03);
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p[1] = 0x80 | ((wc >> 18) & 0x3f);
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p[2] = 0x80 | ((wc >> 12) & 0x3f);
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p[3] = 0x80 | ((wc >> 6) & 0x3f);
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p[4] = 0x80 | (wc & 0x3f);
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p += 5;
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} else if (wc <= 0x7fffffff) {
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p[0] = 0xfc | ((wc >> 30) & 0x01);
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p[1] = 0x80 | ((wc >> 24) & 0x3f);
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p[1] = 0x80 | ((wc >> 18) & 0x3f);
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p[2] = 0x80 | ((wc >> 12) & 0x3f);
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p[3] = 0x80 | ((wc >> 6) & 0x3f);
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p[4] = 0x80 | (wc & 0x3f);
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p += 6;
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}
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/* Ignore larger values; UTF-8 can't encode them. */
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}
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*p = '\0';
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return (utf8_value);
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}
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static void
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add_pax_attr_w(struct archive_string *as, const char *key, const wchar_t *wval)
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{
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char *utf8_value = utf8_encode(wval);
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if (utf8_value == NULL)
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return;
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add_pax_attr(as, key, utf8_value);
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free(utf8_value);
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}
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/*
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* Add a key/value attribute to the pax header. This function handles
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* the length field and various other syntactic requirements.
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*/
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static void
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add_pax_attr(struct archive_string *as, const char *key, const char *value)
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{
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int digits, i, len, next_ten;
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char tmp[1 + 3 * sizeof(int)]; /* < 3 base-10 digits per byte */
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|
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/*-
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* PAX attributes have the following layout:
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* <len> <space> <key> <=> <value> <nl>
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*/
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len = 1 + strlen(key) + 1 + strlen(value) + 1;
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/*
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* The <len> field includes the length of the <len> field, so
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* computing the correct length is tricky. I start by
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* counting the number of base-10 digits in 'len' and
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* computing the next higher power of 10.
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*/
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|
next_ten = 1;
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digits = 0;
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i = len;
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while (i > 0) {
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i = i / 10;
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digits++;
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next_ten = next_ten * 10;
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}
|
|
/*
|
|
* For example, if string without the length field is 99
|
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* chars, then adding the 2 digit length "99" will force the
|
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* total length past 100, requiring an extra digit. The next
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* statement adjusts for this effect.
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*/
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if (len + digits >= next_ten)
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digits++;
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/* Now, we have the right length so we can build the line. */
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tmp[sizeof(tmp) - 1] = 0; /* Null-terminate the work area. */
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archive_strcat(as, format_int(tmp + sizeof(tmp) - 1, len + digits));
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archive_strappend_char(as, ' ');
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archive_strcat(as, key);
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archive_strappend_char(as, '=');
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archive_strcat(as, value);
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archive_strappend_char(as, '\n');
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}
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static void
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archive_write_pax_header_xattrs(struct pax *pax, struct archive_entry *entry)
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{
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struct archive_string s;
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int i = archive_entry_xattr_reset(entry);
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while (i--) {
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const char *name;
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const void *value;
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char *encoded_value;
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|
char *url_encoded_name = NULL, *encoded_name = NULL;
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wchar_t *wcs_name = NULL;
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size_t size;
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archive_entry_xattr_next(entry, &name, &value, &size);
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/* Name is URL-encoded, then converted to wchar_t,
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* then UTF-8 encoded. */
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url_encoded_name = url_encode(name);
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if (url_encoded_name != NULL) {
|
|
/* Convert narrow-character to wide-character. */
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int wcs_length = strlen(url_encoded_name);
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wcs_name = (wchar_t *)malloc((wcs_length + 1) * sizeof(wchar_t));
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if (wcs_name == NULL)
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__archive_errx(1, "No memory for xattr conversion");
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mbstowcs(wcs_name, url_encoded_name, wcs_length);
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wcs_name[wcs_length] = 0;
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free(url_encoded_name); /* Done with this. */
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}
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if (wcs_name != NULL) {
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encoded_name = utf8_encode(wcs_name);
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free(wcs_name); /* Done with wchar_t name. */
|
|
}
|
|
|
|
encoded_value = base64_encode((const char *)value, size);
|
|
|
|
if (encoded_name != NULL && encoded_value != NULL) {
|
|
archive_string_init(&s);
|
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archive_strcpy(&s, "LIBARCHIVE.xattr.");
|
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archive_strcat(&s, encoded_name);
|
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add_pax_attr(&(pax->pax_header), s.s, encoded_value);
|
|
archive_string_free(&s);
|
|
}
|
|
free(encoded_name);
|
|
free(encoded_value);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* TODO: Consider adding 'comment' and 'charset' fields to
|
|
* archive_entry so that clients can specify them. Also, consider
|
|
* adding generic key/value tags so clients can add arbitrary
|
|
* key/value data.
|
|
*/
|
|
static int
|
|
archive_write_pax_header(struct archive_write *a,
|
|
struct archive_entry *entry_original)
|
|
{
|
|
struct archive_entry *entry_main;
|
|
const char *p;
|
|
char *t;
|
|
const wchar_t *wp;
|
|
const char *suffix;
|
|
int need_extension, r, ret;
|
|
struct pax *pax;
|
|
const char *hdrcharset = NULL;
|
|
const char *hardlink;
|
|
const char *path = NULL, *linkpath = NULL;
|
|
const char *uname = NULL, *gname = NULL;
|
|
const wchar_t *path_w = NULL, *linkpath_w = NULL;
|
|
const wchar_t *uname_w = NULL, *gname_w = NULL;
|
|
|
|
char paxbuff[512];
|
|
char ustarbuff[512];
|
|
char ustar_entry_name[256];
|
|
char pax_entry_name[256];
|
|
|
|
ret = ARCHIVE_OK;
|
|
need_extension = 0;
|
|
pax = (struct pax *)a->format_data;
|
|
|
|
hardlink = archive_entry_hardlink(entry_original);
|
|
|
|
/* Make sure this is a type of entry that we can handle here */
|
|
if (hardlink == NULL) {
|
|
switch (archive_entry_filetype(entry_original)) {
|
|
case AE_IFBLK:
|
|
case AE_IFCHR:
|
|
case AE_IFIFO:
|
|
case AE_IFLNK:
|
|
case AE_IFREG:
|
|
break;
|
|
case AE_IFDIR:
|
|
/*
|
|
* Ensure a trailing '/'. Modify the original
|
|
* entry so the client sees the change.
|
|
*/
|
|
p = archive_entry_pathname(entry_original);
|
|
if (p[strlen(p) - 1] != '/') {
|
|
t = (char *)malloc(strlen(p) + 2);
|
|
if (t == NULL) {
|
|
archive_set_error(&a->archive, ENOMEM,
|
|
"Can't allocate pax data");
|
|
return(ARCHIVE_FATAL);
|
|
}
|
|
strcpy(t, p);
|
|
strcat(t, "/");
|
|
archive_entry_copy_pathname(entry_original, t);
|
|
free(t);
|
|
}
|
|
break;
|
|
default:
|
|
archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
|
|
"tar format cannot archive this (type=0%lo)",
|
|
(unsigned long)archive_entry_filetype(entry_original));
|
|
return (ARCHIVE_WARN);
|
|
}
|
|
}
|
|
|
|
/* Copy entry so we can modify it as needed. */
|
|
entry_main = archive_entry_clone(entry_original);
|
|
archive_string_empty(&(pax->pax_header)); /* Blank our work area. */
|
|
|
|
/*
|
|
* First, check the name fields and see if any of them
|
|
* require binary coding. If any of them does, then all of
|
|
* them do.
|
|
*/
|
|
hdrcharset = NULL;
|
|
path = archive_entry_pathname(entry_main);
|
|
path_w = archive_entry_pathname_w(entry_main);
|
|
if (path != NULL && path_w == NULL) {
|
|
archive_set_error(&a->archive, EILSEQ,
|
|
"Can't translate pathname '%s' to UTF-8", path);
|
|
ret = ARCHIVE_WARN;
|
|
hdrcharset = "BINARY";
|
|
}
|
|
uname = archive_entry_uname(entry_main);
|
|
uname_w = archive_entry_uname_w(entry_main);
|
|
if (uname != NULL && uname_w == NULL) {
|
|
archive_set_error(&a->archive, EILSEQ,
|
|
"Can't translate uname '%s' to UTF-8", uname);
|
|
ret = ARCHIVE_WARN;
|
|
hdrcharset = "BINARY";
|
|
}
|
|
gname = archive_entry_gname(entry_main);
|
|
gname_w = archive_entry_gname_w(entry_main);
|
|
if (gname != NULL && gname_w == NULL) {
|
|
archive_set_error(&a->archive, EILSEQ,
|
|
"Can't translate gname '%s' to UTF-8", gname);
|
|
ret = ARCHIVE_WARN;
|
|
hdrcharset = "BINARY";
|
|
}
|
|
linkpath = hardlink;
|
|
if (linkpath != NULL) {
|
|
linkpath_w = archive_entry_hardlink_w(entry_main);
|
|
} else {
|
|
linkpath = archive_entry_symlink(entry_main);
|
|
if (linkpath != NULL)
|
|
linkpath_w = archive_entry_symlink_w(entry_main);
|
|
}
|
|
if (linkpath != NULL && linkpath_w == NULL) {
|
|
archive_set_error(&a->archive, EILSEQ,
|
|
"Can't translate linkpath '%s' to UTF-8", linkpath);
|
|
ret = ARCHIVE_WARN;
|
|
hdrcharset = "BINARY";
|
|
}
|
|
|
|
/* Store the header encoding first, to be nice to readers. */
|
|
if (hdrcharset != NULL)
|
|
add_pax_attr(&(pax->pax_header), "hdrcharset", hdrcharset);
|
|
|
|
|
|
/*
|
|
* If name is too long, or has non-ASCII characters, add
|
|
* 'path' to pax extended attrs. (Note that an unconvertible
|
|
* name must have non-ASCII characters.)
|
|
*/
|
|
if (path == NULL) {
|
|
/* We don't have a narrow version, so we have to store
|
|
* the wide version. */
|
|
add_pax_attr_w(&(pax->pax_header), "path", path_w);
|
|
archive_entry_set_pathname(entry_main, "@WidePath");
|
|
need_extension = 1;
|
|
} else if (has_non_ASCII(path_w)) {
|
|
/* We have non-ASCII characters. */
|
|
if (path_w == NULL || hdrcharset != NULL) {
|
|
/* Can't do UTF-8, so store it raw. */
|
|
add_pax_attr(&(pax->pax_header), "path", path);
|
|
} else {
|
|
/* Store UTF-8 */
|
|
add_pax_attr_w(&(pax->pax_header),
|
|
"path", path_w);
|
|
}
|
|
archive_entry_set_pathname(entry_main,
|
|
build_ustar_entry_name(ustar_entry_name,
|
|
path, strlen(path), NULL));
|
|
need_extension = 1;
|
|
} else {
|
|
/* We have an all-ASCII path; we'd like to just store
|
|
* it in the ustar header if it will fit. Yes, this
|
|
* duplicates some of the logic in
|
|
* write_set_format_ustar.c
|
|
*/
|
|
if (strlen(path) <= 100) {
|
|
/* Fits in the old 100-char tar name field. */
|
|
} else {
|
|
/* Find largest suffix that will fit. */
|
|
/* Note: strlen() > 100, so strlen() - 100 - 1 >= 0 */
|
|
suffix = strchr(path + strlen(path) - 100 - 1, '/');
|
|
/* Don't attempt an empty prefix. */
|
|
if (suffix == path)
|
|
suffix = strchr(suffix + 1, '/');
|
|
/* We can put it in the ustar header if it's
|
|
* all ASCII and it's either <= 100 characters
|
|
* or can be split at a '/' into a prefix <=
|
|
* 155 chars and a suffix <= 100 chars. (Note
|
|
* the strchr() above will return NULL exactly
|
|
* when the path can't be split.)
|
|
*/
|
|
if (suffix == NULL /* Suffix > 100 chars. */
|
|
|| suffix[1] == '\0' /* empty suffix */
|
|
|| suffix - path > 155) /* Prefix > 155 chars */
|
|
{
|
|
if (path_w == NULL || hdrcharset != NULL) {
|
|
/* Can't do UTF-8, so store it raw. */
|
|
add_pax_attr(&(pax->pax_header),
|
|
"path", path);
|
|
} else {
|
|
/* Store UTF-8 */
|
|
add_pax_attr_w(&(pax->pax_header),
|
|
"path", path_w);
|
|
}
|
|
archive_entry_set_pathname(entry_main,
|
|
build_ustar_entry_name(ustar_entry_name,
|
|
path, strlen(path), NULL));
|
|
need_extension = 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (linkpath != NULL) {
|
|
/* If link name is too long or has non-ASCII characters, add
|
|
* 'linkpath' to pax extended attrs. */
|
|
if (strlen(linkpath) > 100 || linkpath_w == NULL
|
|
|| linkpath_w == NULL || has_non_ASCII(linkpath_w)) {
|
|
if (linkpath_w == NULL || hdrcharset != NULL)
|
|
/* If the linkpath is not convertible
|
|
* to wide, or we're encoding in
|
|
* binary anyway, store it raw. */
|
|
add_pax_attr(&(pax->pax_header),
|
|
"linkpath", linkpath);
|
|
else
|
|
/* If the link is long or has a
|
|
* non-ASCII character, store it as a
|
|
* pax extended attribute. */
|
|
add_pax_attr_w(&(pax->pax_header),
|
|
"linkpath", linkpath_w);
|
|
if (strlen(linkpath) > 100) {
|
|
if (hardlink != NULL)
|
|
archive_entry_set_hardlink(entry_main,
|
|
"././@LongHardLink");
|
|
else
|
|
archive_entry_set_symlink(entry_main,
|
|
"././@LongSymLink");
|
|
}
|
|
need_extension = 1;
|
|
}
|
|
}
|
|
|
|
/* If file size is too large, add 'size' to pax extended attrs. */
|
|
if (archive_entry_size(entry_main) >= (((int64_t)1) << 33)) {
|
|
add_pax_attr_int(&(pax->pax_header), "size",
|
|
archive_entry_size(entry_main));
|
|
need_extension = 1;
|
|
}
|
|
|
|
/* If numeric GID is too large, add 'gid' to pax extended attrs. */
|
|
if (archive_entry_gid(entry_main) >= (1 << 18)) {
|
|
add_pax_attr_int(&(pax->pax_header), "gid",
|
|
archive_entry_gid(entry_main));
|
|
need_extension = 1;
|
|
}
|
|
|
|
/* If group name is too large or has non-ASCII characters, add
|
|
* 'gname' to pax extended attrs. */
|
|
if (gname != NULL) {
|
|
if (strlen(gname) > 31
|
|
|| gname_w == NULL
|
|
|| has_non_ASCII(gname_w))
|
|
{
|
|
if (gname_w == NULL || hdrcharset != NULL) {
|
|
add_pax_attr(&(pax->pax_header),
|
|
"gname", gname);
|
|
} else {
|
|
add_pax_attr_w(&(pax->pax_header),
|
|
"gname", gname_w);
|
|
}
|
|
need_extension = 1;
|
|
}
|
|
}
|
|
|
|
/* If numeric UID is too large, add 'uid' to pax extended attrs. */
|
|
if (archive_entry_uid(entry_main) >= (1 << 18)) {
|
|
add_pax_attr_int(&(pax->pax_header), "uid",
|
|
archive_entry_uid(entry_main));
|
|
need_extension = 1;
|
|
}
|
|
|
|
/* Add 'uname' to pax extended attrs if necessary. */
|
|
if (uname != NULL) {
|
|
if (strlen(uname) > 31
|
|
|| uname_w == NULL
|
|
|| has_non_ASCII(uname_w))
|
|
{
|
|
if (uname_w == NULL || hdrcharset != NULL) {
|
|
add_pax_attr(&(pax->pax_header),
|
|
"uname", uname);
|
|
} else {
|
|
add_pax_attr_w(&(pax->pax_header),
|
|
"uname", uname_w);
|
|
}
|
|
need_extension = 1;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* POSIX/SUSv3 doesn't provide a standard key for large device
|
|
* numbers. I use the same keys here that Joerg Schilling
|
|
* used for 'star.' (Which, somewhat confusingly, are called
|
|
* "devXXX" even though they code "rdev" values.) No doubt,
|
|
* other implementations use other keys. Note that there's no
|
|
* reason we can't write the same information into a number of
|
|
* different keys.
|
|
*
|
|
* Of course, this is only needed for block or char device entries.
|
|
*/
|
|
if (archive_entry_filetype(entry_main) == AE_IFBLK
|
|
|| archive_entry_filetype(entry_main) == AE_IFCHR) {
|
|
/*
|
|
* If rdevmajor is too large, add 'SCHILY.devmajor' to
|
|
* extended attributes.
|
|
*/
|
|
dev_t rdevmajor, rdevminor;
|
|
rdevmajor = archive_entry_rdevmajor(entry_main);
|
|
rdevminor = archive_entry_rdevminor(entry_main);
|
|
if (rdevmajor >= (1 << 18)) {
|
|
add_pax_attr_int(&(pax->pax_header), "SCHILY.devmajor",
|
|
rdevmajor);
|
|
/*
|
|
* Non-strict formatting below means we don't
|
|
* have to truncate here. Not truncating improves
|
|
* the chance that some more modern tar archivers
|
|
* (such as GNU tar 1.13) can restore the full
|
|
* value even if they don't understand the pax
|
|
* extended attributes. See my rant below about
|
|
* file size fields for additional details.
|
|
*/
|
|
/* archive_entry_set_rdevmajor(entry_main,
|
|
rdevmajor & ((1 << 18) - 1)); */
|
|
need_extension = 1;
|
|
}
|
|
|
|
/*
|
|
* If devminor is too large, add 'SCHILY.devminor' to
|
|
* extended attributes.
|
|
*/
|
|
if (rdevminor >= (1 << 18)) {
|
|
add_pax_attr_int(&(pax->pax_header), "SCHILY.devminor",
|
|
rdevminor);
|
|
/* Truncation is not necessary here, either. */
|
|
/* archive_entry_set_rdevminor(entry_main,
|
|
rdevminor & ((1 << 18) - 1)); */
|
|
need_extension = 1;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Technically, the mtime field in the ustar header can
|
|
* support 33 bits, but many platforms use signed 32-bit time
|
|
* values. The cutoff of 0x7fffffff here is a compromise.
|
|
* Yes, this check is duplicated just below; this helps to
|
|
* avoid writing an mtime attribute just to handle a
|
|
* high-resolution timestamp in "restricted pax" mode.
|
|
*/
|
|
if (!need_extension &&
|
|
((archive_entry_mtime(entry_main) < 0)
|
|
|| (archive_entry_mtime(entry_main) >= 0x7fffffff)))
|
|
need_extension = 1;
|
|
|
|
/* I use a star-compatible file flag attribute. */
|
|
p = archive_entry_fflags_text(entry_main);
|
|
if (!need_extension && p != NULL && *p != '\0')
|
|
need_extension = 1;
|
|
|
|
/* If there are non-trivial ACL entries, we need an extension. */
|
|
if (!need_extension && archive_entry_acl_count(entry_original,
|
|
ARCHIVE_ENTRY_ACL_TYPE_ACCESS) > 0)
|
|
need_extension = 1;
|
|
|
|
/* If there are non-trivial ACL entries, we need an extension. */
|
|
if (!need_extension && archive_entry_acl_count(entry_original,
|
|
ARCHIVE_ENTRY_ACL_TYPE_DEFAULT) > 0)
|
|
need_extension = 1;
|
|
|
|
/* If there are extended attributes, we need an extension */
|
|
if (!need_extension && archive_entry_xattr_count(entry_original) > 0)
|
|
need_extension = 1;
|
|
|
|
/*
|
|
* The following items are handled differently in "pax
|
|
* restricted" format. In particular, in "pax restricted"
|
|
* format they won't be added unless need_extension is
|
|
* already set (we're already generating an extended header, so
|
|
* may as well include these).
|
|
*/
|
|
if (a->archive.archive_format != ARCHIVE_FORMAT_TAR_PAX_RESTRICTED ||
|
|
need_extension) {
|
|
|
|
if (archive_entry_mtime(entry_main) < 0 ||
|
|
archive_entry_mtime(entry_main) >= 0x7fffffff ||
|
|
archive_entry_mtime_nsec(entry_main) != 0)
|
|
add_pax_attr_time(&(pax->pax_header), "mtime",
|
|
archive_entry_mtime(entry_main),
|
|
archive_entry_mtime_nsec(entry_main));
|
|
|
|
if (archive_entry_ctime(entry_main) != 0 ||
|
|
archive_entry_ctime_nsec(entry_main) != 0)
|
|
add_pax_attr_time(&(pax->pax_header), "ctime",
|
|
archive_entry_ctime(entry_main),
|
|
archive_entry_ctime_nsec(entry_main));
|
|
|
|
if (archive_entry_atime(entry_main) != 0 ||
|
|
archive_entry_atime_nsec(entry_main) != 0)
|
|
add_pax_attr_time(&(pax->pax_header), "atime",
|
|
archive_entry_atime(entry_main),
|
|
archive_entry_atime_nsec(entry_main));
|
|
|
|
/* I use a star-compatible file flag attribute. */
|
|
p = archive_entry_fflags_text(entry_main);
|
|
if (p != NULL && *p != '\0')
|
|
add_pax_attr(&(pax->pax_header), "SCHILY.fflags", p);
|
|
|
|
/* I use star-compatible ACL attributes. */
|
|
wp = archive_entry_acl_text_w(entry_original,
|
|
ARCHIVE_ENTRY_ACL_TYPE_ACCESS |
|
|
ARCHIVE_ENTRY_ACL_STYLE_EXTRA_ID);
|
|
if (wp != NULL && *wp != L'\0')
|
|
add_pax_attr_w(&(pax->pax_header),
|
|
"SCHILY.acl.access", wp);
|
|
wp = archive_entry_acl_text_w(entry_original,
|
|
ARCHIVE_ENTRY_ACL_TYPE_DEFAULT |
|
|
ARCHIVE_ENTRY_ACL_STYLE_EXTRA_ID);
|
|
if (wp != NULL && *wp != L'\0')
|
|
add_pax_attr_w(&(pax->pax_header),
|
|
"SCHILY.acl.default", wp);
|
|
|
|
/* Include star-compatible metadata info. */
|
|
/* Note: "SCHILY.dev{major,minor}" are NOT the
|
|
* major/minor portions of "SCHILY.dev". */
|
|
add_pax_attr_int(&(pax->pax_header), "SCHILY.dev",
|
|
archive_entry_dev(entry_main));
|
|
add_pax_attr_int(&(pax->pax_header), "SCHILY.ino",
|
|
archive_entry_ino(entry_main));
|
|
add_pax_attr_int(&(pax->pax_header), "SCHILY.nlink",
|
|
archive_entry_nlink(entry_main));
|
|
|
|
/* Store extended attributes */
|
|
archive_write_pax_header_xattrs(pax, entry_original);
|
|
}
|
|
|
|
/* Only regular files have data. */
|
|
if (archive_entry_filetype(entry_main) != AE_IFREG)
|
|
archive_entry_set_size(entry_main, 0);
|
|
|
|
/*
|
|
* Pax-restricted does not store data for hardlinks, in order
|
|
* to improve compatibility with ustar.
|
|
*/
|
|
if (a->archive.archive_format != ARCHIVE_FORMAT_TAR_PAX_INTERCHANGE &&
|
|
hardlink != NULL)
|
|
archive_entry_set_size(entry_main, 0);
|
|
|
|
/*
|
|
* XXX Full pax interchange format does permit a hardlink
|
|
* entry to have data associated with it. I'm not supporting
|
|
* that here because the client expects me to tell them whether
|
|
* or not this format expects data for hardlinks. If I
|
|
* don't check here, then every pax archive will end up with
|
|
* duplicated data for hardlinks. Someday, there may be
|
|
* need to select this behavior, in which case the following
|
|
* will need to be revisited. XXX
|
|
*/
|
|
if (hardlink != NULL)
|
|
archive_entry_set_size(entry_main, 0);
|
|
|
|
/* Format 'ustar' header for main entry.
|
|
*
|
|
* The trouble with file size: If the reader can't understand
|
|
* the file size, they may not be able to locate the next
|
|
* entry and the rest of the archive is toast. Pax-compliant
|
|
* readers are supposed to ignore the file size in the main
|
|
* header, so the question becomes how to maximize portability
|
|
* for readers that don't support pax attribute extensions.
|
|
* For maximum compatibility, I permit numeric extensions in
|
|
* the main header so that the file size stored will always be
|
|
* correct, even if it's in a format that only some
|
|
* implementations understand. The technique used here is:
|
|
*
|
|
* a) If possible, follow the standard exactly. This handles
|
|
* files up to 8 gigabytes minus 1.
|
|
*
|
|
* b) If that fails, try octal but omit the field terminator.
|
|
* That handles files up to 64 gigabytes minus 1.
|
|
*
|
|
* c) Otherwise, use base-256 extensions. That handles files
|
|
* up to 2^63 in this implementation, with the potential to
|
|
* go up to 2^94. That should hold us for a while. ;-)
|
|
*
|
|
* The non-strict formatter uses similar logic for other
|
|
* numeric fields, though they're less critical.
|
|
*/
|
|
__archive_write_format_header_ustar(a, ustarbuff, entry_main, -1, 0);
|
|
|
|
/* If we built any extended attributes, write that entry first. */
|
|
if (archive_strlen(&(pax->pax_header)) > 0) {
|
|
struct archive_entry *pax_attr_entry;
|
|
time_t s;
|
|
uid_t uid;
|
|
gid_t gid;
|
|
mode_t mode;
|
|
long ns;
|
|
|
|
pax_attr_entry = archive_entry_new();
|
|
p = archive_entry_pathname(entry_main);
|
|
archive_entry_set_pathname(pax_attr_entry,
|
|
build_pax_attribute_name(pax_entry_name, p));
|
|
archive_entry_set_size(pax_attr_entry,
|
|
archive_strlen(&(pax->pax_header)));
|
|
/* Copy uid/gid (but clip to ustar limits). */
|
|
uid = archive_entry_uid(entry_main);
|
|
if (uid >= 1 << 18)
|
|
uid = (1 << 18) - 1;
|
|
archive_entry_set_uid(pax_attr_entry, uid);
|
|
gid = archive_entry_gid(entry_main);
|
|
if (gid >= 1 << 18)
|
|
gid = (1 << 18) - 1;
|
|
archive_entry_set_gid(pax_attr_entry, gid);
|
|
/* Copy mode over (but not setuid/setgid bits) */
|
|
mode = archive_entry_mode(entry_main);
|
|
#ifdef S_ISUID
|
|
mode &= ~S_ISUID;
|
|
#endif
|
|
#ifdef S_ISGID
|
|
mode &= ~S_ISGID;
|
|
#endif
|
|
#ifdef S_ISVTX
|
|
mode &= ~S_ISVTX;
|
|
#endif
|
|
archive_entry_set_mode(pax_attr_entry, mode);
|
|
|
|
/* Copy uname/gname. */
|
|
archive_entry_set_uname(pax_attr_entry,
|
|
archive_entry_uname(entry_main));
|
|
archive_entry_set_gname(pax_attr_entry,
|
|
archive_entry_gname(entry_main));
|
|
|
|
/* Copy mtime, but clip to ustar limits. */
|
|
s = archive_entry_mtime(entry_main);
|
|
ns = archive_entry_mtime_nsec(entry_main);
|
|
if (s < 0) { s = 0; ns = 0; }
|
|
if (s > 0x7fffffff) { s = 0x7fffffff; ns = 0; }
|
|
archive_entry_set_mtime(pax_attr_entry, s, ns);
|
|
|
|
/* Ditto for atime. */
|
|
s = archive_entry_atime(entry_main);
|
|
ns = archive_entry_atime_nsec(entry_main);
|
|
if (s < 0) { s = 0; ns = 0; }
|
|
if (s > 0x7fffffff) { s = 0x7fffffff; ns = 0; }
|
|
archive_entry_set_atime(pax_attr_entry, s, ns);
|
|
|
|
/* Standard ustar doesn't support ctime. */
|
|
archive_entry_set_ctime(pax_attr_entry, 0, 0);
|
|
|
|
r = __archive_write_format_header_ustar(a, paxbuff,
|
|
pax_attr_entry, 'x', 1);
|
|
|
|
archive_entry_free(pax_attr_entry);
|
|
|
|
/* Note that the 'x' header shouldn't ever fail to format */
|
|
if (r != 0) {
|
|
const char *msg = "archive_write_pax_header: "
|
|
"'x' header failed?! This can't happen.\n";
|
|
write(2, msg, strlen(msg));
|
|
exit(1);
|
|
}
|
|
r = (a->compressor.write)(a, paxbuff, 512);
|
|
if (r != ARCHIVE_OK) {
|
|
pax->entry_bytes_remaining = 0;
|
|
pax->entry_padding = 0;
|
|
return (ARCHIVE_FATAL);
|
|
}
|
|
|
|
pax->entry_bytes_remaining = archive_strlen(&(pax->pax_header));
|
|
pax->entry_padding = 0x1ff & (-(int64_t)pax->entry_bytes_remaining);
|
|
|
|
r = (a->compressor.write)(a, pax->pax_header.s,
|
|
archive_strlen(&(pax->pax_header)));
|
|
if (r != ARCHIVE_OK) {
|
|
/* If a write fails, we're pretty much toast. */
|
|
return (ARCHIVE_FATAL);
|
|
}
|
|
/* Pad out the end of the entry. */
|
|
r = write_nulls(a, pax->entry_padding);
|
|
if (r != ARCHIVE_OK) {
|
|
/* If a write fails, we're pretty much toast. */
|
|
return (ARCHIVE_FATAL);
|
|
}
|
|
pax->entry_bytes_remaining = pax->entry_padding = 0;
|
|
}
|
|
|
|
/* Write the header for main entry. */
|
|
r = (a->compressor.write)(a, ustarbuff, 512);
|
|
if (r != ARCHIVE_OK)
|
|
return (r);
|
|
|
|
/*
|
|
* Inform the client of the on-disk size we're using, so
|
|
* they can avoid unnecessarily writing a body for something
|
|
* that we're just going to ignore.
|
|
*/
|
|
archive_entry_set_size(entry_original, archive_entry_size(entry_main));
|
|
pax->entry_bytes_remaining = archive_entry_size(entry_main);
|
|
pax->entry_padding = 0x1ff & (-(int64_t)pax->entry_bytes_remaining);
|
|
archive_entry_free(entry_main);
|
|
|
|
return (ret);
|
|
}
|
|
|
|
/*
|
|
* We need a valid name for the regular 'ustar' entry. This routine
|
|
* tries to hack something more-or-less reasonable.
|
|
*
|
|
* The approach here tries to preserve leading dir names. We do so by
|
|
* working with four sections:
|
|
* 1) "prefix" directory names,
|
|
* 2) "suffix" directory names,
|
|
* 3) inserted dir name (optional),
|
|
* 4) filename.
|
|
*
|
|
* These sections must satisfy the following requirements:
|
|
* * Parts 1 & 2 together form an initial portion of the dir name.
|
|
* * Part 3 is specified by the caller. (It should not contain a leading
|
|
* or trailing '/'.)
|
|
* * Part 4 forms an initial portion of the base filename.
|
|
* * The filename must be <= 99 chars to fit the ustar 'name' field.
|
|
* * Parts 2, 3, 4 together must be <= 99 chars to fit the ustar 'name' fld.
|
|
* * Part 1 must be <= 155 chars to fit the ustar 'prefix' field.
|
|
* * If the original name ends in a '/', the new name must also end in a '/'
|
|
* * Trailing '/.' sequences may be stripped.
|
|
*
|
|
* Note: Recall that the ustar format does not store the '/' separating
|
|
* parts 1 & 2, but does store the '/' separating parts 2 & 3.
|
|
*/
|
|
static char *
|
|
build_ustar_entry_name(char *dest, const char *src, size_t src_length,
|
|
const char *insert)
|
|
{
|
|
const char *prefix, *prefix_end;
|
|
const char *suffix, *suffix_end;
|
|
const char *filename, *filename_end;
|
|
char *p;
|
|
int need_slash = 0; /* Was there a trailing slash? */
|
|
size_t suffix_length = 99;
|
|
int insert_length;
|
|
|
|
/* Length of additional dir element to be added. */
|
|
if (insert == NULL)
|
|
insert_length = 0;
|
|
else
|
|
/* +2 here allows for '/' before and after the insert. */
|
|
insert_length = strlen(insert) + 2;
|
|
|
|
/* Step 0: Quick bailout in a common case. */
|
|
if (src_length < 100 && insert == NULL) {
|
|
strncpy(dest, src, src_length);
|
|
dest[src_length] = '\0';
|
|
return (dest);
|
|
}
|
|
|
|
/* Step 1: Locate filename and enforce the length restriction. */
|
|
filename_end = src + src_length;
|
|
/* Remove trailing '/' chars and '/.' pairs. */
|
|
for (;;) {
|
|
if (filename_end > src && filename_end[-1] == '/') {
|
|
filename_end --;
|
|
need_slash = 1; /* Remember to restore trailing '/'. */
|
|
continue;
|
|
}
|
|
if (filename_end > src + 1 && filename_end[-1] == '.'
|
|
&& filename_end[-2] == '/') {
|
|
filename_end -= 2;
|
|
need_slash = 1; /* "foo/." will become "foo/" */
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
if (need_slash)
|
|
suffix_length--;
|
|
/* Find start of filename. */
|
|
filename = filename_end - 1;
|
|
while ((filename > src) && (*filename != '/'))
|
|
filename --;
|
|
if ((*filename == '/') && (filename < filename_end - 1))
|
|
filename ++;
|
|
/* Adjust filename_end so that filename + insert fits in 99 chars. */
|
|
suffix_length -= insert_length;
|
|
if (filename_end > filename + suffix_length)
|
|
filename_end = filename + suffix_length;
|
|
/* Calculate max size for "suffix" section (#3 above). */
|
|
suffix_length -= filename_end - filename;
|
|
|
|
/* Step 2: Locate the "prefix" section of the dirname, including
|
|
* trailing '/'. */
|
|
prefix = src;
|
|
prefix_end = prefix + 155;
|
|
if (prefix_end > filename)
|
|
prefix_end = filename;
|
|
while (prefix_end > prefix && *prefix_end != '/')
|
|
prefix_end--;
|
|
if ((prefix_end < filename) && (*prefix_end == '/'))
|
|
prefix_end++;
|
|
|
|
/* Step 3: Locate the "suffix" section of the dirname,
|
|
* including trailing '/'. */
|
|
suffix = prefix_end;
|
|
suffix_end = suffix + suffix_length; /* Enforce limit. */
|
|
if (suffix_end > filename)
|
|
suffix_end = filename;
|
|
if (suffix_end < suffix)
|
|
suffix_end = suffix;
|
|
while (suffix_end > suffix && *suffix_end != '/')
|
|
suffix_end--;
|
|
if ((suffix_end < filename) && (*suffix_end == '/'))
|
|
suffix_end++;
|
|
|
|
/* Step 4: Build the new name. */
|
|
/* The OpenBSD strlcpy function is safer, but less portable. */
|
|
/* Rather than maintain two versions, just use the strncpy version. */
|
|
p = dest;
|
|
if (prefix_end > prefix) {
|
|
strncpy(p, prefix, prefix_end - prefix);
|
|
p += prefix_end - prefix;
|
|
}
|
|
if (suffix_end > suffix) {
|
|
strncpy(p, suffix, suffix_end - suffix);
|
|
p += suffix_end - suffix;
|
|
}
|
|
if (insert != NULL) {
|
|
/* Note: assume insert does not have leading or trailing '/' */
|
|
strcpy(p, insert);
|
|
p += strlen(insert);
|
|
*p++ = '/';
|
|
}
|
|
strncpy(p, filename, filename_end - filename);
|
|
p += filename_end - filename;
|
|
if (need_slash)
|
|
*p++ = '/';
|
|
*p++ = '\0';
|
|
|
|
return (dest);
|
|
}
|
|
|
|
/*
|
|
* The ustar header for the pax extended attributes must have a
|
|
* reasonable name: SUSv3 requires 'dirname'/PaxHeader.'pid'/'filename'
|
|
* where 'pid' is the PID of the archiving process. Unfortunately,
|
|
* that makes testing a pain since the output varies for each run,
|
|
* so I'm sticking with the simpler 'dirname'/PaxHeader/'filename'
|
|
* for now. (Someday, I'll make this settable. Then I can use the
|
|
* SUS recommendation as default and test harnesses can override it
|
|
* to get predictable results.)
|
|
*
|
|
* Joerg Schilling has argued that this is unnecessary because, in
|
|
* practice, if the pax extended attributes get extracted as regular
|
|
* files, noone is going to bother reading those attributes to
|
|
* manually restore them. Based on this, 'star' uses
|
|
* /tmp/PaxHeader/'basename' as the ustar header name. This is a
|
|
* tempting argument, in part because it's simpler than the SUSv3
|
|
* recommendation, but I'm not entirely convinced. I'm also
|
|
* uncomfortable with the fact that "/tmp" is a Unix-ism.
|
|
*
|
|
* The following routine leverages build_ustar_entry_name() above and
|
|
* so is simpler than you might think. It just needs to provide the
|
|
* additional path element and handle a few pathological cases).
|
|
*/
|
|
static char *
|
|
build_pax_attribute_name(char *dest, const char *src)
|
|
{
|
|
char buff[64];
|
|
const char *p;
|
|
|
|
/* Handle the null filename case. */
|
|
if (src == NULL || *src == '\0') {
|
|
strcpy(dest, "PaxHeader/blank");
|
|
return (dest);
|
|
}
|
|
|
|
/* Prune final '/' and other unwanted final elements. */
|
|
p = src + strlen(src);
|
|
for (;;) {
|
|
/* Ends in "/", remove the '/' */
|
|
if (p > src && p[-1] == '/') {
|
|
--p;
|
|
continue;
|
|
}
|
|
/* Ends in "/.", remove the '.' */
|
|
if (p > src + 1 && p[-1] == '.'
|
|
&& p[-2] == '/') {
|
|
--p;
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
|
|
/* Pathological case: After above, there was nothing left.
|
|
* This includes "/." "/./." "/.//./." etc. */
|
|
if (p == src) {
|
|
strcpy(dest, "/PaxHeader/rootdir");
|
|
return (dest);
|
|
}
|
|
|
|
/* Convert unadorned "." into a suitable filename. */
|
|
if (*src == '.' && p == src + 1) {
|
|
strcpy(dest, "PaxHeader/currentdir");
|
|
return (dest);
|
|
}
|
|
|
|
/*
|
|
* TODO: Push this string into the 'pax' structure to avoid
|
|
* recomputing it every time. That will also open the door
|
|
* to having clients override it.
|
|
*/
|
|
#if HAVE_GETPID && 0 /* Disable this for now; see above comment. */
|
|
sprintf(buff, "PaxHeader.%d", getpid());
|
|
#else
|
|
/* If the platform can't fetch the pid, don't include it. */
|
|
strcpy(buff, "PaxHeader");
|
|
#endif
|
|
/* General case: build a ustar-compatible name adding "/PaxHeader/". */
|
|
build_ustar_entry_name(dest, src, p - src, buff);
|
|
|
|
return (dest);
|
|
}
|
|
|
|
/* Write two null blocks for the end of archive */
|
|
static int
|
|
archive_write_pax_finish(struct archive_write *a)
|
|
{
|
|
struct pax *pax;
|
|
int r;
|
|
|
|
if (a->compressor.write == NULL)
|
|
return (ARCHIVE_OK);
|
|
|
|
pax = (struct pax *)a->format_data;
|
|
r = write_nulls(a, 512 * 2);
|
|
return (r);
|
|
}
|
|
|
|
static int
|
|
archive_write_pax_destroy(struct archive_write *a)
|
|
{
|
|
struct pax *pax;
|
|
|
|
pax = (struct pax *)a->format_data;
|
|
archive_string_free(&pax->pax_header);
|
|
free(pax);
|
|
a->format_data = NULL;
|
|
return (ARCHIVE_OK);
|
|
}
|
|
|
|
static int
|
|
archive_write_pax_finish_entry(struct archive_write *a)
|
|
{
|
|
struct pax *pax;
|
|
int ret;
|
|
|
|
pax = (struct pax *)a->format_data;
|
|
ret = write_nulls(a, pax->entry_bytes_remaining + pax->entry_padding);
|
|
pax->entry_bytes_remaining = pax->entry_padding = 0;
|
|
return (ret);
|
|
}
|
|
|
|
static int
|
|
write_nulls(struct archive_write *a, size_t padding)
|
|
{
|
|
int ret, to_write;
|
|
|
|
while (padding > 0) {
|
|
to_write = padding < a->null_length ? padding : a->null_length;
|
|
ret = (a->compressor.write)(a, a->nulls, to_write);
|
|
if (ret != ARCHIVE_OK)
|
|
return (ret);
|
|
padding -= to_write;
|
|
}
|
|
return (ARCHIVE_OK);
|
|
}
|
|
|
|
static ssize_t
|
|
archive_write_pax_data(struct archive_write *a, const void *buff, size_t s)
|
|
{
|
|
struct pax *pax;
|
|
int ret;
|
|
|
|
pax = (struct pax *)a->format_data;
|
|
if (s > pax->entry_bytes_remaining)
|
|
s = pax->entry_bytes_remaining;
|
|
|
|
ret = (a->compressor.write)(a, buff, s);
|
|
pax->entry_bytes_remaining -= s;
|
|
if (ret == ARCHIVE_OK)
|
|
return (s);
|
|
else
|
|
return (ret);
|
|
}
|
|
|
|
static int
|
|
has_non_ASCII(const wchar_t *wp)
|
|
{
|
|
if (wp == NULL)
|
|
return (1);
|
|
while (*wp != L'\0' && *wp < 128)
|
|
wp++;
|
|
return (*wp != L'\0');
|
|
}
|
|
|
|
/*
|
|
* Used by extended attribute support; encodes the name
|
|
* so that there will be no '=' characters in the result.
|
|
*/
|
|
static char *
|
|
url_encode(const char *in)
|
|
{
|
|
const char *s;
|
|
char *d;
|
|
int out_len = 0;
|
|
char *out;
|
|
|
|
for (s = in; *s != '\0'; s++) {
|
|
if (*s < 33 || *s > 126 || *s == '%' || *s == '=')
|
|
out_len += 3;
|
|
else
|
|
out_len++;
|
|
}
|
|
|
|
out = (char *)malloc(out_len + 1);
|
|
if (out == NULL)
|
|
return (NULL);
|
|
|
|
for (s = in, d = out; *s != '\0'; s++) {
|
|
/* encode any non-printable ASCII character or '%' or '=' */
|
|
if (*s < 33 || *s > 126 || *s == '%' || *s == '=') {
|
|
/* URL encoding is '%' followed by two hex digits */
|
|
*d++ = '%';
|
|
*d++ = "0123456789ABCDEF"[0x0f & (*s >> 4)];
|
|
*d++ = "0123456789ABCDEF"[0x0f & *s];
|
|
} else {
|
|
*d++ = *s;
|
|
}
|
|
}
|
|
*d = '\0';
|
|
return (out);
|
|
}
|
|
|
|
/*
|
|
* Encode a sequence of bytes into a C string using base-64 encoding.
|
|
*
|
|
* Returns a null-terminated C string allocated with malloc(); caller
|
|
* is responsible for freeing the result.
|
|
*/
|
|
static char *
|
|
base64_encode(const char *s, size_t len)
|
|
{
|
|
static const char digits[64] =
|
|
{ 'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O',
|
|
'P','Q','R','S','T','U','V','W','X','Y','Z','a','b','c','d',
|
|
'e','f','g','h','i','j','k','l','m','n','o','p','q','r','s',
|
|
't','u','v','w','x','y','z','0','1','2','3','4','5','6','7',
|
|
'8','9','+','/' };
|
|
int v;
|
|
char *d, *out;
|
|
|
|
/* 3 bytes becomes 4 chars, but round up and allow for trailing NUL */
|
|
out = (char *)malloc((len * 4 + 2) / 3 + 1);
|
|
if (out == NULL)
|
|
return (NULL);
|
|
d = out;
|
|
|
|
/* Convert each group of 3 bytes into 4 characters. */
|
|
while (len >= 3) {
|
|
v = (((int)s[0] << 16) & 0xff0000)
|
|
| (((int)s[1] << 8) & 0xff00)
|
|
| (((int)s[2]) & 0x00ff);
|
|
s += 3;
|
|
len -= 3;
|
|
*d++ = digits[(v >> 18) & 0x3f];
|
|
*d++ = digits[(v >> 12) & 0x3f];
|
|
*d++ = digits[(v >> 6) & 0x3f];
|
|
*d++ = digits[(v) & 0x3f];
|
|
}
|
|
/* Handle final group of 1 byte (2 chars) or 2 bytes (3 chars). */
|
|
switch (len) {
|
|
case 0: break;
|
|
case 1:
|
|
v = (((int)s[0] << 16) & 0xff0000);
|
|
*d++ = digits[(v >> 18) & 0x3f];
|
|
*d++ = digits[(v >> 12) & 0x3f];
|
|
break;
|
|
case 2:
|
|
v = (((int)s[0] << 16) & 0xff0000)
|
|
| (((int)s[1] << 8) & 0xff00);
|
|
*d++ = digits[(v >> 18) & 0x3f];
|
|
*d++ = digits[(v >> 12) & 0x3f];
|
|
*d++ = digits[(v >> 6) & 0x3f];
|
|
break;
|
|
}
|
|
/* Add trailing NUL character so output is a valid C string. */
|
|
*d++ = '\0';
|
|
return (out);
|
|
}
|