mirror of
git://git.gnupg.org/gnupg.git
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ed53d41b4c
* tools/gpgtar.c: New option --with-log. * tools/gpgtar.h (opt): Add field with_log. * tools/gpgtar-extract.c (gpgtar_extract): Move directory string building up. Add option --log-file if needed. * tools/gpgtar-create.c (gpgtar_create): Make tmpbuf static becuase it is used outside of its scope. * tools/gpgtar-list.c (gpgtar_list): Ditto.
645 lines
17 KiB
C
645 lines
17 KiB
C
/* gpgtar.c - A simple TAR implementation mainly useful for Windows.
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* Copyright (C) 2010 Free Software Foundation, Inc.
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*
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* This file is part of GnuPG.
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*
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* GnuPG is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* GnuPG is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <https://www.gnu.org/licenses/>.
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* SPDX-License-Identifier: GPL-3.0-or-later
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*/
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/* GnuPG comes with a shell script gpg-zip which creates archive files
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in the same format as PGP Zip, which is actually a USTAR format.
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That is fine and works nicely on all Unices but for Windows we
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don't have a compatible shell and the supply of tar programs is
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limited. Given that we need just a few tar option and it is an
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open question how many Unix concepts are to be mapped to Windows,
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we might as well write our own little tar customized for use with
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gpg. So here we go. */
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#include <config.h>
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#include <ctype.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#define INCLUDED_BY_MAIN_MODULE 1
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#include "../common/util.h"
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#include "../common/i18n.h"
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#include "../common/sysutils.h"
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#include "../common/openpgpdefs.h"
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#include "../common/init.h"
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#include "../common/strlist.h"
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#include "gpgtar.h"
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/* Constants to identify the commands and options. */
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enum cmd_and_opt_values
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{
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aNull = 0,
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aCreate = 600,
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aExtract,
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aEncrypt = 'e',
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aDecrypt = 'd',
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aSign = 's',
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aList = 't',
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oSymmetric = 'c',
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oRecipient = 'r',
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oUser = 'u',
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oOutput = 'o',
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oDirectory = 'C',
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oQuiet = 'q',
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oVerbose = 'v',
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oFilesFrom = 'T',
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oNoVerbose = 500,
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aSignEncrypt,
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oGpgProgram,
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oSkipCrypto,
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oOpenPGP,
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oCMS,
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oSetFilename,
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oNull,
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oUtf8Strings,
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oBatch,
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oAnswerYes,
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oAnswerNo,
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oStatusFD,
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oRequireCompliance,
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oWithLog,
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/* Compatibility with gpg-zip. */
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oGpgArgs,
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oTarArgs,
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oTarProgram,
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/* Debugging. */
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oDryRun
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};
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/* The list of commands and options. */
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static gpgrt_opt_t opts[] = {
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ARGPARSE_group (300, N_("@Commands:\n ")),
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ARGPARSE_c (aCreate, "create", N_("create an archive")),
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ARGPARSE_c (aExtract, "extract", N_("extract an archive")),
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ARGPARSE_c (aEncrypt, "encrypt", N_("create an encrypted archive")),
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ARGPARSE_c (aDecrypt, "decrypt", N_("extract an encrypted archive")),
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ARGPARSE_c (aSign, "sign", N_("create a signed archive")),
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ARGPARSE_c (aList, "list-archive", N_("list an archive")),
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ARGPARSE_group (301, N_("@\nOptions:\n ")),
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ARGPARSE_s_n (oSymmetric, "symmetric", N_("use symmetric encryption")),
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ARGPARSE_s_s (oRecipient, "recipient", N_("|USER-ID|encrypt for USER-ID")),
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ARGPARSE_s_s (oUser, "local-user",
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N_("|USER-ID|use USER-ID to sign or decrypt")),
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ARGPARSE_s_s (oOutput, "output", N_("|FILE|write output to FILE")),
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ARGPARSE_s_n (oVerbose, "verbose", N_("verbose")),
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ARGPARSE_s_n (oQuiet, "quiet", N_("be somewhat more quiet")),
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ARGPARSE_s_s (oGpgProgram, "gpg", "@"),
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ARGPARSE_s_n (oSkipCrypto, "skip-crypto", N_("skip the crypto processing")),
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ARGPARSE_s_n (oDryRun, "dry-run", N_("do not make any changes")),
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ARGPARSE_s_s (oSetFilename, "set-filename", "@"),
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ARGPARSE_s_n (oOpenPGP, "openpgp", "@"),
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ARGPARSE_s_n (oCMS, "cms", "@"),
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ARGPARSE_s_n (oBatch, "batch", "@"),
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ARGPARSE_s_n (oAnswerYes, "yes", "@"),
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ARGPARSE_s_n (oAnswerNo, "no", "@"),
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ARGPARSE_s_i (oStatusFD, "status-fd", "@"),
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ARGPARSE_s_n (oRequireCompliance, "require-compliance", "@"),
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ARGPARSE_s_n (oWithLog, "with-log", "@"),
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ARGPARSE_group (302, N_("@\nTar options:\n ")),
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ARGPARSE_s_s (oDirectory, "directory",
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N_("|DIRECTORY|change to DIRECTORY first")),
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ARGPARSE_s_s (oFilesFrom, "files-from",
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N_("|FILE|get names to create from FILE")),
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ARGPARSE_s_n (oNull, "null", N_("-T reads null-terminated names")),
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#ifdef HAVE_W32_SYSTEM
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ARGPARSE_s_n (oUtf8Strings, "utf8-strings",
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N_("-T reads UTF-8 encoded names")),
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#else
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ARGPARSE_s_n (oUtf8Strings, "utf8-strings", "@"),
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#endif
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ARGPARSE_s_s (oGpgArgs, "gpg-args", "@"),
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ARGPARSE_s_s (oTarArgs, "tar-args", "@"),
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ARGPARSE_s_s (oTarProgram, "tar", "@"),
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ARGPARSE_end ()
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};
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/* The list of commands and options for tar that we understand. */
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static gpgrt_opt_t tar_opts[] = {
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ARGPARSE_s_s (oDirectory, "directory",
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N_("|DIRECTORY|extract files into DIRECTORY")),
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ARGPARSE_s_s (oFilesFrom, "files-from",
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N_("|FILE|get names to create from FILE")),
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ARGPARSE_s_n (oNull, "null", N_("-T reads null-terminated names")),
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ARGPARSE_end ()
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};
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/* Global flags. */
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static enum cmd_and_opt_values cmd = 0;
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static int skip_crypto = 0;
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static const char *files_from = NULL;
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static int null_names = 0;
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/* Print usage information and provide strings for help. */
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static const char *
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my_strusage( int level )
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{
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const char *p;
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switch (level)
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{
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case 9: p = "GPL-3.0-or-later"; break;
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case 11: p = "@GPGTAR@ (@GNUPG@)";
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break;
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case 13: p = VERSION; break;
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case 14: p = GNUPG_DEF_COPYRIGHT_LINE; break;
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case 17: p = PRINTABLE_OS_NAME; break;
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case 19: p = _("Please report bugs to <@EMAIL@>.\n"); break;
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case 1:
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case 40:
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p = _("Usage: gpgtar [options] [files] [directories] (-h for help)");
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break;
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case 41:
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p = _("Syntax: gpgtar [options] [files] [directories]\n"
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"Encrypt or sign files into an archive\n");
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break;
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default: p = NULL; break;
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}
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return p;
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}
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static void
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set_cmd (enum cmd_and_opt_values *ret_cmd, enum cmd_and_opt_values new_cmd)
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{
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enum cmd_and_opt_values c = *ret_cmd;
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if (!c || c == new_cmd)
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c = new_cmd;
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else if (c == aSign && new_cmd == aEncrypt)
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c = aSignEncrypt;
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else if (c == aEncrypt && new_cmd == aSign)
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c = aSignEncrypt;
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else
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{
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log_error (_("conflicting commands\n"));
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exit (2);
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}
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*ret_cmd = c;
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}
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/* Shell-like argument splitting.
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For compatibility with gpg-zip we accept arguments for GnuPG and
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tar given as a string argument to '--gpg-args' and '--tar-args'.
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gpg-zip was implemented as a Bourne Shell script, and therefore, we
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need to split the string the same way the shell would. */
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static int
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shell_parse_stringlist (const char *str, strlist_t *r_list)
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{
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strlist_t list = NULL;
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const char *s = str;
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char quoted = 0;
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char arg[1024];
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char *p = arg;
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#define addchar(c) \
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do { if (p - arg + 2 < sizeof arg) *p++ = (c); else return 1; } while (0)
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#define addargument() \
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do { \
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if (p > arg) \
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{ \
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*p = 0; \
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append_to_strlist (&list, arg); \
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p = arg; \
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} \
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} while (0)
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#define unquoted 0
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#define singlequote '\''
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#define doublequote '"'
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for (; *s; s++)
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{
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switch (quoted)
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{
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case unquoted:
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if (isspace (*s))
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addargument ();
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else if (*s == singlequote || *s == doublequote)
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quoted = *s;
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else
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addchar (*s);
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break;
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case singlequote:
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if (*s == singlequote)
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quoted = unquoted;
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else
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addchar (*s);
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break;
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case doublequote:
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log_assert (s > str || !"cannot be quoted at first char");
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if (*s == doublequote && *(s - 1) != '\\')
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quoted = unquoted;
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else
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addchar (*s);
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break;
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default:
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log_assert (! "reached");
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}
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}
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/* Append the last argument. */
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addargument ();
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#undef doublequote
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#undef singlequote
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#undef unquoted
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#undef addargument
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#undef addchar
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*r_list = list;
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return 0;
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}
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/* Like shell_parse_stringlist, but returns an argv vector
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instead of a strlist. */
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static int
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shell_parse_argv (const char *s, int *r_argc, char ***r_argv)
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{
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int i;
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strlist_t list;
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if (shell_parse_stringlist (s, &list))
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return 1;
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*r_argc = strlist_length (list);
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*r_argv = xtrycalloc (*r_argc, sizeof **r_argv);
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if (*r_argv == NULL)
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return 1;
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for (i = 0; list; i++)
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{
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gpgrt_annotate_leaked_object (list);
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(*r_argv)[i] = list->d;
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list = list->next;
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}
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gpgrt_annotate_leaked_object (*r_argv);
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return 0;
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}
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/* Command line parsing. */
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static void
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parse_arguments (gpgrt_argparse_t *pargs, gpgrt_opt_t *popts)
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{
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int no_more_options = 0;
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while (!no_more_options && gpgrt_argparse (NULL, pargs, popts))
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{
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switch (pargs->r_opt)
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{
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case oOutput: opt.outfile = pargs->r.ret_str; break;
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case oDirectory: opt.directory = pargs->r.ret_str; break;
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case oSetFilename: opt.filename = pargs->r.ret_str; break;
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case oQuiet: opt.quiet = 1; break;
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case oVerbose: opt.verbose++; break;
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case oNoVerbose: opt.verbose = 0; break;
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case oFilesFrom: files_from = pargs->r.ret_str; break;
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case oNull: null_names = 1; break;
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case oUtf8Strings: opt.utf8strings = 1; break;
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case aList:
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case aDecrypt:
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case aEncrypt:
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case aSign:
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set_cmd (&cmd, pargs->r_opt);
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break;
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case aCreate:
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set_cmd (&cmd, aEncrypt);
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skip_crypto = 1;
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break;
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case aExtract:
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set_cmd (&cmd, aDecrypt);
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skip_crypto = 1;
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break;
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case oRecipient:
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add_to_strlist (&opt.recipients, pargs->r.ret_str);
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break;
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case oUser:
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opt.user = pargs->r.ret_str;
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break;
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case oSymmetric:
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set_cmd (&cmd, aEncrypt);
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opt.symmetric = 1;
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break;
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case oGpgProgram:
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opt.gpg_program = pargs->r.ret_str;
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break;
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case oSkipCrypto:
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skip_crypto = 1;
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break;
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case oOpenPGP: /* Dummy option for now. */ break;
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case oCMS: /* Dummy option for now. */ break;
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case oBatch: opt.batch = 1; break;
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case oAnswerYes: opt.answer_yes = 1; break;
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case oAnswerNo: opt.answer_no = 1; break;
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case oStatusFD: opt.status_fd = pargs->r.ret_int; break;
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case oRequireCompliance: opt.require_compliance = 1; break;
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case oWithLog: opt.with_log = 1; break;
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case oGpgArgs:;
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{
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strlist_t list;
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if (shell_parse_stringlist (pargs->r.ret_str, &list))
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log_error ("failed to parse gpg arguments '%s'\n",
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pargs->r.ret_str);
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else
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{
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if (opt.gpg_arguments)
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strlist_last (opt.gpg_arguments)->next = list;
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else
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opt.gpg_arguments = list;
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}
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}
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break;
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case oTarProgram: /* Dummy option. */
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break;
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case oTarArgs:
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{
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int tar_argc;
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char **tar_argv;
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if (shell_parse_argv (pargs->r.ret_str, &tar_argc, &tar_argv))
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log_error ("failed to parse tar arguments '%s'\n",
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pargs->r.ret_str);
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else
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{
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gpgrt_argparse_t tar_args;
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tar_args.argc = &tar_argc;
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tar_args.argv = &tar_argv;
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tar_args.flags = ARGPARSE_FLAG_ARG0;
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parse_arguments (&tar_args, tar_opts);
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gpgrt_argparse (NULL, &tar_args, NULL);
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if (tar_args.err)
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log_error ("unsupported tar arguments '%s'\n",
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pargs->r.ret_str);
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pargs->err = tar_args.err;
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}
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}
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break;
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case oDryRun:
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opt.dry_run = 1;
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break;
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default: pargs->err = 2; break;
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}
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}
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}
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/* gpgtar main. */
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int
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main (int argc, char **argv)
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{
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gpg_error_t err;
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const char *fname;
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gpgrt_argparse_t pargs;
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gnupg_reopen_std (GPGTAR_NAME);
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gpgrt_set_strusage (my_strusage);
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log_set_prefix (GPGTAR_NAME, GPGRT_LOG_WITH_PREFIX);
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/* Make sure that our subsystems are ready. */
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i18n_init();
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init_common_subsystems (&argc, &argv);
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gnupg_init_signals (0, NULL);
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log_assert (sizeof (struct ustar_raw_header) == 512);
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/* Set default options */
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opt.status_fd = -1;
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/* Parse the command line. */
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pargs.argc = &argc;
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pargs.argv = &argv;
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pargs.flags = ARGPARSE_FLAG_KEEP;
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parse_arguments (&pargs, opts);
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gpgrt_argparse (NULL, &pargs, NULL);
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if (log_get_errorcount (0))
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exit (2);
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/* Print a warning if an argument looks like an option. */
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if (!opt.quiet && !(pargs.flags & ARGPARSE_FLAG_STOP_SEEN))
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{
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int i;
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for (i=0; i < argc; i++)
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if (argv[i][0] == '-' && argv[i][1] == '-')
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log_info (_("NOTE: '%s' is not considered an option\n"), argv[i]);
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}
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if (! opt.gpg_program)
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opt.gpg_program = gnupg_module_name (GNUPG_MODULE_NAME_GPG);
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if (opt.verbose > 1)
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opt.debug_level = 1024;
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switch (cmd)
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{
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case aList:
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if (argc > 1)
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gpgrt_usage (1);
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fname = argc ? *argv : NULL;
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if (opt.filename)
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log_info ("note: ignoring option --set-filename\n");
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if (files_from)
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log_info ("note: ignoring option --files-from\n");
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err = gpgtar_list (fname, !skip_crypto);
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if (err && log_get_errorcount (0) == 0)
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log_error ("listing archive failed: %s\n", gpg_strerror (err));
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break;
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case aEncrypt:
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case aSign:
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case aSignEncrypt:
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||
if ((!argc && !files_from)
|
||
|| (argc && files_from))
|
||
gpgrt_usage (1);
|
||
if (opt.filename)
|
||
log_info ("note: ignoring option --set-filename\n");
|
||
err = gpgtar_create (files_from? NULL : argv,
|
||
files_from,
|
||
null_names,
|
||
!skip_crypto
|
||
&& (cmd == aEncrypt || cmd == aSignEncrypt),
|
||
cmd == aSign || cmd == aSignEncrypt);
|
||
if (err && log_get_errorcount (0) == 0)
|
||
log_error ("creating archive failed: %s\n", gpg_strerror (err));
|
||
break;
|
||
|
||
case aDecrypt:
|
||
if (argc != 1)
|
||
gpgrt_usage (1);
|
||
if (opt.outfile)
|
||
log_info ("note: ignoring option --output\n");
|
||
if (files_from)
|
||
log_info ("note: ignoring option --files-from\n");
|
||
fname = argc ? *argv : NULL;
|
||
err = gpgtar_extract (fname, !skip_crypto);
|
||
if (err && log_get_errorcount (0) == 0)
|
||
log_error ("extracting archive failed: %s\n", gpg_strerror (err));
|
||
break;
|
||
|
||
default:
|
||
log_error (_("invalid command (there is no implicit command)\n"));
|
||
break;
|
||
}
|
||
|
||
return log_get_errorcount (0)? 1:0;
|
||
}
|
||
|
||
|
||
/* Read the next record from STREAM. RECORD is a buffer provided by
|
||
the caller and must be at least of size RECORDSIZE. The function
|
||
return 0 on success and error code on failure; a diagnostic
|
||
printed as well. Note that there is no need for an EOF indicator
|
||
because a tarball has an explicit EOF record. */
|
||
gpg_error_t
|
||
read_record (estream_t stream, void *record)
|
||
{
|
||
gpg_error_t err;
|
||
size_t nread;
|
||
|
||
nread = es_fread (record, 1, RECORDSIZE, stream);
|
||
if (nread != RECORDSIZE)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
if (es_ferror (stream))
|
||
log_error ("error reading '%s': %s\n",
|
||
es_fname_get (stream), gpg_strerror (err));
|
||
else
|
||
log_error ("error reading '%s': premature EOF "
|
||
"(size of last record: %zu)\n",
|
||
es_fname_get (stream), nread);
|
||
}
|
||
else
|
||
err = 0;
|
||
|
||
return err;
|
||
}
|
||
|
||
|
||
/* Write the RECORD of size RECORDSIZE to STREAM. FILENAME is the
|
||
name of the file used for diagnostics. */
|
||
gpg_error_t
|
||
write_record (estream_t stream, const void *record)
|
||
{
|
||
gpg_error_t err;
|
||
size_t nwritten;
|
||
|
||
nwritten = es_fwrite (record, 1, RECORDSIZE, stream);
|
||
if (nwritten != RECORDSIZE)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
log_error ("error writing '%s': %s\n",
|
||
es_fname_get (stream), gpg_strerror (err));
|
||
}
|
||
else
|
||
err = 0;
|
||
|
||
return err;
|
||
}
|
||
|
||
|
||
/* Return true if FP is an unarmored OpenPGP message. Note that this
|
||
function reads a few bytes from FP but pushes them back. */
|
||
#if 0
|
||
static int
|
||
openpgp_message_p (estream_t fp)
|
||
{
|
||
int ctb;
|
||
|
||
ctb = es_getc (fp);
|
||
if (ctb != EOF)
|
||
{
|
||
if (es_ungetc (ctb, fp))
|
||
log_fatal ("error ungetting first byte: %s\n",
|
||
gpg_strerror (gpg_error_from_syserror ()));
|
||
|
||
if ((ctb & 0x80))
|
||
{
|
||
switch ((ctb & 0x40) ? (ctb & 0x3f) : ((ctb>>2)&0xf))
|
||
{
|
||
case PKT_MARKER:
|
||
case PKT_SYMKEY_ENC:
|
||
case PKT_ONEPASS_SIG:
|
||
case PKT_PUBKEY_ENC:
|
||
case PKT_SIGNATURE:
|
||
case PKT_COMMENT:
|
||
case PKT_OLD_COMMENT:
|
||
case PKT_PLAINTEXT:
|
||
case PKT_COMPRESSED:
|
||
case PKT_ENCRYPTED:
|
||
return 1; /* Yes, this seems to be an OpenPGP message. */
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
return 0;
|
||
}
|
||
#endif
|