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627 lines
19 KiB
627 lines
19 KiB
/*-
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* Copyright (c) 2003-2007 Tim Kientzle
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* Copyright (c) 2008 Joerg Sonnenberger
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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: src/lib/libarchive/archive_write_set_format_shar.c,v 1.20 2008/08/31 07:10:40 kientzle Exp $");
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#ifdef HAVE_ERRNO_H
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#include <errno.h>
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#endif
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#include <stdio.h>
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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 shar {
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int dump;
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int end_of_line;
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struct archive_entry *entry;
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int has_data;
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char *last_dir;
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/* Line buffer for uuencoded dump format */
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char outbuff[45];
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size_t outpos;
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int wrote_header;
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struct archive_string work;
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struct archive_string quoted_name;
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};
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static int archive_write_shar_finish(struct archive_write *);
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static int archive_write_shar_destroy(struct archive_write *);
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static int archive_write_shar_header(struct archive_write *,
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struct archive_entry *);
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static ssize_t archive_write_shar_data_sed(struct archive_write *,
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const void * buff, size_t);
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static ssize_t archive_write_shar_data_uuencode(struct archive_write *,
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const void * buff, size_t);
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static int archive_write_shar_finish_entry(struct archive_write *);
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/*
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* Copy the given string to the buffer, quoting all shell meta characters
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* found.
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*/
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static void
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shar_quote(struct archive_string *buf, const char *str, int in_shell)
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{
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static const char meta[] = "\n \t'`\";&<>()|*?{}[]\\$!#^~";
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size_t len;
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while (*str != '\0') {
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if ((len = strcspn(str, meta)) != 0) {
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archive_strncat(buf, str, len);
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str += len;
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} else if (*str == '\n') {
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if (in_shell)
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archive_strcat(buf, "\"\n\"");
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else
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archive_strcat(buf, "\\n");
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++str;
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} else {
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archive_strappend_char(buf, '\\');
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archive_strappend_char(buf, *str);
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++str;
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}
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}
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}
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/*
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* Set output format to 'shar' format.
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*/
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int
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archive_write_set_format_shar(struct archive *_a)
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{
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struct archive_write *a = (struct archive_write *)_a;
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struct shar *shar;
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/* If someone else was already registered, unregister them. */
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if (a->format_destroy != NULL)
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(a->format_destroy)(a);
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shar = (struct shar *)malloc(sizeof(*shar));
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if (shar == NULL) {
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archive_set_error(&a->archive, ENOMEM, "Can't allocate shar data");
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return (ARCHIVE_FATAL);
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}
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memset(shar, 0, sizeof(*shar));
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archive_string_init(&shar->work);
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archive_string_init(&shar->quoted_name);
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a->format_data = shar;
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a->pad_uncompressed = 0;
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a->format_name = "shar";
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a->format_write_header = archive_write_shar_header;
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a->format_finish = archive_write_shar_finish;
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a->format_destroy = archive_write_shar_destroy;
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a->format_write_data = archive_write_shar_data_sed;
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a->format_finish_entry = archive_write_shar_finish_entry;
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a->archive.archive_format = ARCHIVE_FORMAT_SHAR_BASE;
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a->archive.archive_format_name = "shar";
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return (ARCHIVE_OK);
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}
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/*
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* An alternate 'shar' that uses uudecode instead of 'sed' to encode
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* file contents and can therefore be used to archive binary files.
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* In addition, this variant also attempts to restore ownership, file modes,
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* and other extended file information.
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*/
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int
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archive_write_set_format_shar_dump(struct archive *_a)
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{
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struct archive_write *a = (struct archive_write *)_a;
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struct shar *shar;
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archive_write_set_format_shar(&a->archive);
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shar = (struct shar *)a->format_data;
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shar->dump = 1;
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a->format_write_data = archive_write_shar_data_uuencode;
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a->archive.archive_format = ARCHIVE_FORMAT_SHAR_DUMP;
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a->archive.archive_format_name = "shar dump";
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return (ARCHIVE_OK);
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}
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static int
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archive_write_shar_header(struct archive_write *a, struct archive_entry *entry)
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{
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const char *linkname;
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const char *name;
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char *p, *pp;
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struct shar *shar;
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shar = (struct shar *)a->format_data;
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if (!shar->wrote_header) {
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archive_strcat(&shar->work, "#!/bin/sh\n");
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archive_strcat(&shar->work, "# This is a shell archive\n");
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shar->wrote_header = 1;
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}
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/* Save the entry for the closing. */
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if (shar->entry)
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archive_entry_free(shar->entry);
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shar->entry = archive_entry_clone(entry);
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name = archive_entry_pathname(entry);
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/* Handle some preparatory issues. */
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switch(archive_entry_filetype(entry)) {
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case AE_IFREG:
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/* Only regular files have non-zero size. */
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break;
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case AE_IFDIR:
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archive_entry_set_size(entry, 0);
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/* Don't bother trying to recreate '.' */
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if (strcmp(name, ".") == 0 || strcmp(name, "./") == 0)
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return (ARCHIVE_OK);
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break;
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case AE_IFIFO:
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case AE_IFCHR:
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case AE_IFBLK:
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/* All other file types have zero size in the archive. */
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archive_entry_set_size(entry, 0);
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break;
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default:
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archive_entry_set_size(entry, 0);
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if (archive_entry_hardlink(entry) == NULL &&
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archive_entry_symlink(entry) == NULL) {
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archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
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"shar format cannot archive this");
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return (ARCHIVE_WARN);
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}
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}
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archive_string_empty(&shar->quoted_name);
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shar_quote(&shar->quoted_name, name, 1);
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/* Stock preparation for all file types. */
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archive_string_sprintf(&shar->work, "echo x %s\n", shar->quoted_name.s);
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if (archive_entry_filetype(entry) != AE_IFDIR) {
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/* Try to create the dir. */
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p = strdup(name);
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pp = strrchr(p, '/');
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/* If there is a / character, try to create the dir. */
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if (pp != NULL) {
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*pp = '\0';
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/* Try to avoid a lot of redundant mkdir commands. */
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if (strcmp(p, ".") == 0) {
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/* Don't try to "mkdir ." */
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free(p);
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} else if (shar->last_dir == NULL) {
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archive_strcat(&shar->work, "mkdir -p ");
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shar_quote(&shar->work, p, 1);
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archive_strcat(&shar->work,
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" > /dev/null 2>&1\n");
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shar->last_dir = p;
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} else if (strcmp(p, shar->last_dir) == 0) {
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/* We've already created this exact dir. */
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free(p);
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} else if (strlen(p) < strlen(shar->last_dir) &&
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strncmp(p, shar->last_dir, strlen(p)) == 0) {
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/* We've already created a subdir. */
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free(p);
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} else {
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archive_strcat(&shar->work, "mkdir -p ");
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shar_quote(&shar->work, p, 1);
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archive_strcat(&shar->work,
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" > /dev/null 2>&1\n");
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shar->last_dir = p;
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}
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} else {
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free(p);
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}
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}
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/* Handle file-type specific issues. */
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shar->has_data = 0;
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if ((linkname = archive_entry_hardlink(entry)) != NULL) {
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archive_strcat(&shar->work, "ln -f ");
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shar_quote(&shar->work, linkname, 1);
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archive_string_sprintf(&shar->work, " %s\n",
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shar->quoted_name.s);
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} else if ((linkname = archive_entry_symlink(entry)) != NULL) {
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archive_strcat(&shar->work, "ln -fs ");
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shar_quote(&shar->work, linkname, 1);
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archive_string_sprintf(&shar->work, " %s\n",
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shar->quoted_name.s);
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} else {
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switch(archive_entry_filetype(entry)) {
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case AE_IFREG:
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if (archive_entry_size(entry) == 0) {
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/* More portable than "touch." */
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archive_string_sprintf(&shar->work,
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"test -e \"%s\" || :> \"%s\"\n",
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shar->quoted_name.s, shar->quoted_name.s);
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} else {
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if (shar->dump) {
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archive_string_sprintf(&shar->work,
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"uudecode -p > %s << 'SHAR_END'\n",
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shar->quoted_name.s);
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archive_string_sprintf(&shar->work,
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"begin %o ",
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archive_entry_mode(entry) & 0777);
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shar_quote(&shar->work, name, 0);
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archive_strcat(&shar->work, "\n");
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} else {
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archive_string_sprintf(&shar->work,
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"sed 's/^X//' > %s << 'SHAR_END'\n",
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shar->quoted_name.s);
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}
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shar->has_data = 1;
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shar->end_of_line = 1;
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shar->outpos = 0;
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}
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break;
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case AE_IFDIR:
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archive_string_sprintf(&shar->work,
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"mkdir -p %s > /dev/null 2>&1\n",
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shar->quoted_name.s);
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/* Record that we just created this directory. */
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if (shar->last_dir != NULL)
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free(shar->last_dir);
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shar->last_dir = strdup(name);
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/* Trim a trailing '/'. */
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pp = strrchr(shar->last_dir, '/');
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if (pp != NULL && pp[1] == '\0')
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*pp = '\0';
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/*
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* TODO: Put dir name/mode on a list to be fixed
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* up at end of archive.
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*/
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break;
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case AE_IFIFO:
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archive_string_sprintf(&shar->work,
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"mkfifo %s\n", shar->quoted_name.s);
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break;
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case AE_IFCHR:
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archive_string_sprintf(&shar->work,
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"mknod %s c %d %d\n", shar->quoted_name.s,
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archive_entry_rdevmajor(entry),
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archive_entry_rdevminor(entry));
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break;
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case AE_IFBLK:
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archive_string_sprintf(&shar->work,
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"mknod %s b %d %d\n", shar->quoted_name.s,
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archive_entry_rdevmajor(entry),
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archive_entry_rdevminor(entry));
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break;
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default:
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return (ARCHIVE_WARN);
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}
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}
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return (ARCHIVE_OK);
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}
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static ssize_t
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archive_write_shar_data_sed(struct archive_write *a, const void *buff, size_t n)
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{
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static const size_t ensured = 65533;
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struct shar *shar;
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const char *src;
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char *buf, *buf_end;
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int ret;
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size_t written = n;
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shar = (struct shar *)a->format_data;
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if (!shar->has_data || n == 0)
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return (0);
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src = (const char *)buff;
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/*
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* ensure is the number of bytes in buffer before expanding the
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* current character. Each operation writes the current character
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* and optionally the start-of-new-line marker. This can happen
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* twice before entering the loop, so make sure three additional
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* bytes can be written.
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*/
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if (archive_string_ensure(&shar->work, ensured + 3) == NULL)
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__archive_errx(1, "Out of memory");
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if (shar->work.length > ensured) {
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ret = (*a->compressor.write)(a, shar->work.s,
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shar->work.length);
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if (ret != ARCHIVE_OK)
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return (ARCHIVE_FATAL);
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archive_string_empty(&shar->work);
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}
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buf = shar->work.s + shar->work.length;
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buf_end = shar->work.s + ensured;
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if (shar->end_of_line) {
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*buf++ = 'X';
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shar->end_of_line = 0;
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}
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while (n-- != 0) {
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if ((*buf++ = *src++) == '\n') {
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if (n == 0)
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shar->end_of_line = 1;
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else
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*buf++ = 'X';
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}
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if (buf >= buf_end) {
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shar->work.length = buf - shar->work.s;
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ret = (*a->compressor.write)(a, shar->work.s,
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shar->work.length);
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if (ret != ARCHIVE_OK)
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return (ARCHIVE_FATAL);
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archive_string_empty(&shar->work);
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buf = shar->work.s;
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}
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}
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shar->work.length = buf - shar->work.s;
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return (written);
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}
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#define UUENC(c) (((c)!=0) ? ((c) & 077) + ' ': '`')
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static void
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uuencode_group(const char _in[3], char out[4])
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{
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const unsigned char *in = (const unsigned char *)_in;
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int t;
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t = (in[0] << 16) | (in[1] << 8) | in[2];
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out[0] = UUENC( 0x3f & (t >> 18) );
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out[1] = UUENC( 0x3f & (t >> 12) );
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out[2] = UUENC( 0x3f & (t >> 6) );
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out[3] = UUENC( 0x3f & t );
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}
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static void
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uuencode_line(struct shar *shar, const char *inbuf, size_t len)
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{
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char tmp_buf[3], *buf;
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size_t alloc_len;
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/* len <= 45 -> expanded to 60 + len byte + new line */
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alloc_len = shar->work.length + 62;
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if (archive_string_ensure(&shar->work, alloc_len) == NULL)
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__archive_errx(1, "Out of memory");
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buf = shar->work.s + shar->work.length;
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*buf++ = UUENC(len);
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while (len >= 3) {
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uuencode_group(inbuf, buf);
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len -= 3;
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inbuf += 3;
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buf += 4;
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}
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if (len != 0) {
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tmp_buf[0] = inbuf[0];
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if (len == 1)
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tmp_buf[1] = '\0';
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else
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tmp_buf[1] = inbuf[1];
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tmp_buf[2] = '\0';
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uuencode_group(inbuf, buf);
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buf += 4;
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}
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*buf++ = '\n';
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if ((buf - shar->work.s) > (ptrdiff_t)(shar->work.length + 62))
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__archive_errx(1, "Buffer overflow");
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shar->work.length = buf - shar->work.s;
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}
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static ssize_t
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archive_write_shar_data_uuencode(struct archive_write *a, const void *buff,
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size_t length)
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{
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struct shar *shar;
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const char *src;
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size_t n;
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int ret;
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shar = (struct shar *)a->format_data;
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if (!shar->has_data)
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return (ARCHIVE_OK);
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src = (const char *)buff;
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if (shar->outpos != 0) {
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n = 45 - shar->outpos;
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if (n > length)
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n = length;
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memcpy(shar->outbuff + shar->outpos, src, n);
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if (shar->outpos + n < 45) {
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shar->outpos += n;
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return length;
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}
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uuencode_line(shar, shar->outbuff, 45);
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src += n;
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n = length - n;
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} else {
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n = length;
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}
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while (n >= 45) {
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uuencode_line(shar, src, 45);
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src += 45;
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n -= 45;
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if (shar->work.length < 65536)
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continue;
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ret = (*a->compressor.write)(a, shar->work.s,
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shar->work.length);
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if (ret != ARCHIVE_OK)
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return (ARCHIVE_FATAL);
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archive_string_empty(&shar->work);
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}
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if (n != 0) {
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memcpy(shar->outbuff, src, n);
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shar->outpos = n;
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}
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return (length);
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}
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static int
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archive_write_shar_finish_entry(struct archive_write *a)
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{
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const char *g, *p, *u;
|
|
struct shar *shar;
|
|
int ret;
|
|
|
|
shar = (struct shar *)a->format_data;
|
|
if (shar->entry == NULL)
|
|
return (0);
|
|
|
|
if (shar->dump) {
|
|
/* Finish uuencoded data. */
|
|
if (shar->has_data) {
|
|
if (shar->outpos > 0)
|
|
uuencode_line(shar, shar->outbuff,
|
|
shar->outpos);
|
|
archive_strcat(&shar->work, "`\nend\n");
|
|
archive_strcat(&shar->work, "SHAR_END\n");
|
|
}
|
|
/* Restore file mode, owner, flags. */
|
|
/*
|
|
* TODO: Don't immediately restore mode for
|
|
* directories; defer that to end of script.
|
|
*/
|
|
archive_string_sprintf(&shar->work, "chmod %o ",
|
|
archive_entry_mode(shar->entry) & 07777);
|
|
shar_quote(&shar->work, archive_entry_pathname(shar->entry), 1);
|
|
archive_strcat(&shar->work, "\n");
|
|
|
|
u = archive_entry_uname(shar->entry);
|
|
g = archive_entry_gname(shar->entry);
|
|
if (u != NULL || g != NULL) {
|
|
archive_strcat(&shar->work, "chown ");
|
|
if (u != NULL)
|
|
shar_quote(&shar->work, u, 1);
|
|
if (g != NULL) {
|
|
archive_strcat(&shar->work, ":");
|
|
shar_quote(&shar->work, g, 1);
|
|
}
|
|
shar_quote(&shar->work,
|
|
archive_entry_pathname(shar->entry), 1);
|
|
archive_strcat(&shar->work, "\n");
|
|
}
|
|
|
|
if ((p = archive_entry_fflags_text(shar->entry)) != NULL) {
|
|
archive_string_sprintf(&shar->work, "chflags %s ",
|
|
p, archive_entry_pathname(shar->entry));
|
|
shar_quote(&shar->work,
|
|
archive_entry_pathname(shar->entry), 1);
|
|
archive_strcat(&shar->work, "\n");
|
|
}
|
|
|
|
/* TODO: restore ACLs */
|
|
|
|
} else {
|
|
if (shar->has_data) {
|
|
/* Finish sed-encoded data: ensure last line ends. */
|
|
if (!shar->end_of_line)
|
|
archive_strappend_char(&shar->work, '\n');
|
|
archive_strcat(&shar->work, "SHAR_END\n");
|
|
}
|
|
}
|
|
|
|
archive_entry_free(shar->entry);
|
|
shar->entry = NULL;
|
|
|
|
if (shar->work.length < 65536)
|
|
return (ARCHIVE_OK);
|
|
|
|
ret = (*a->compressor.write)(a, shar->work.s, shar->work.length);
|
|
if (ret != ARCHIVE_OK)
|
|
return (ARCHIVE_FATAL);
|
|
archive_string_empty(&shar->work);
|
|
|
|
return (ARCHIVE_OK);
|
|
}
|
|
|
|
static int
|
|
archive_write_shar_finish(struct archive_write *a)
|
|
{
|
|
struct shar *shar;
|
|
int ret;
|
|
|
|
/*
|
|
* TODO: Accumulate list of directory names/modes and
|
|
* fix them all up at end-of-archive.
|
|
*/
|
|
|
|
shar = (struct shar *)a->format_data;
|
|
|
|
/*
|
|
* Only write the end-of-archive markers if the archive was
|
|
* actually started. This avoids problems if someone sets
|
|
* shar format, then sets another format (which would invoke
|
|
* shar_finish to free the format-specific data).
|
|
*/
|
|
if (shar->wrote_header == 0)
|
|
return (ARCHIVE_OK);
|
|
|
|
archive_strcat(&shar->work, "exit\n");
|
|
|
|
ret = (*a->compressor.write)(a, shar->work.s, shar->work.length);
|
|
if (ret != ARCHIVE_OK)
|
|
return (ARCHIVE_FATAL);
|
|
|
|
/* Shar output is never padded. */
|
|
archive_write_set_bytes_in_last_block(&a->archive, 1);
|
|
/*
|
|
* TODO: shar should also suppress padding of
|
|
* uncompressed data within gzip/bzip2 streams.
|
|
*/
|
|
|
|
return (ARCHIVE_OK);
|
|
}
|
|
|
|
static int
|
|
archive_write_shar_destroy(struct archive_write *a)
|
|
{
|
|
struct shar *shar;
|
|
|
|
shar = (struct shar *)a->format_data;
|
|
if (shar == NULL)
|
|
return (ARCHIVE_OK);
|
|
|
|
archive_entry_free(shar->entry);
|
|
free(shar->last_dir);
|
|
archive_string_free(&(shar->work));
|
|
archive_string_free(&(shar->quoted_name));
|
|
free(shar);
|
|
a->format_data = NULL;
|
|
return (ARCHIVE_OK);
|
|
}
|