mirror of
git://git.gnupg.org/gnupg.git
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964 lines
25 KiB
C
964 lines
25 KiB
C
/* g13.c - Disk Key management with GnuPG
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* Copyright (C) 2009 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 <http://www.gnu.org/licenses/>.
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*/
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#include <config.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <ctype.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <pth.h>
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#include "g13.h"
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#include <gcrypt.h>
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#include <assuan.h>
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#include "i18n.h"
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#include "sysutils.h"
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#include "gc-opt-flags.h"
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#include "asshelp.h"
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#include "keyblob.h"
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#include "server.h"
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#include "runner.h"
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#include "create.h"
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#include "mount.h"
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#include "mountinfo.h"
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enum cmd_and_opt_values {
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aNull = 0,
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oQuiet = 'q',
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oVerbose = 'v',
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oRecipient = 'r',
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aGPGConfList = 500,
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aGPGConfTest,
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aCreate,
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aMount,
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aUmount,
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aServer,
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oOptions,
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oDebug,
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oDebugLevel,
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oDebugAll,
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oDebugNone,
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oDebugWait,
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oDebugAllowCoreDump,
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oLogFile,
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oNoLogFile,
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oAuditLog,
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oOutput,
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oAgentProgram,
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oGpgProgram,
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oDisplay,
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oTTYname,
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oTTYtype,
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oLCctype,
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oLCmessages,
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oXauthority,
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oStatusFD,
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oLoggerFD,
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oNoVerbose,
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oNoSecmemWarn,
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oNoGreeting,
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oNoTTY,
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oNoOptions,
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oHomedir,
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oWithColons,
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oDryRun,
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oNoDetach,
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oNoRandomSeedFile,
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oFakedSystemTime
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};
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static ARGPARSE_OPTS opts[] = {
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ARGPARSE_group (300, N_("@Commands:\n ")),
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ARGPARSE_c (aCreate, "create", N_("Create a new file system container")),
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ARGPARSE_c (aMount, "mount", N_("Mount a file system container") ),
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ARGPARSE_c (aUmount, "umount", N_("Unmount a file system container") ),
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ARGPARSE_c (aServer, "server", N_("Run in server mode")),
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ARGPARSE_c (aGPGConfList, "gpgconf-list", "@"),
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ARGPARSE_c (aGPGConfTest, "gpgconf-test", "@"),
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ARGPARSE_group (301, N_("@\nOptions:\n ")),
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ARGPARSE_s_s (oRecipient, "recipient", N_("|USER-ID|encrypt for USER-ID")),
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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_n (oNoTTY, "no-tty", N_("don't use the terminal at all")),
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ARGPARSE_s_n (oNoDetach, "no-detach", N_("do not detach from the console")),
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ARGPARSE_s_s (oLogFile, "log-file", N_("|FILE|write log output to FILE")),
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ARGPARSE_s_n (oNoLogFile, "no-log-file", "@"),
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ARGPARSE_s_i (oLoggerFD, "logger-fd", "@"),
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ARGPARSE_s_n (oDryRun, "dry-run", N_("do not make any changes")),
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ARGPARSE_s_s (oOptions, "options", N_("|FILE|read options from FILE")),
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ARGPARSE_p_u (oDebug, "debug", "@"),
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ARGPARSE_s_s (oDebugLevel, "debug-level",
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N_("|LEVEL|set the debugging level to LEVEL")),
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ARGPARSE_s_n (oDebugAll, "debug-all", "@"),
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ARGPARSE_s_n (oDebugNone, "debug-none", "@"),
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ARGPARSE_s_i (oDebugWait, "debug-wait", "@"),
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ARGPARSE_s_n (oDebugAllowCoreDump, "debug-allow-core-dump", "@"),
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ARGPARSE_s_i (oStatusFD, "status-fd",
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N_("|FD|write status info to this FD")),
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ARGPARSE_group (302, N_(
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"@\n(See the man page for a complete listing of all commands and options)\n"
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)),
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ARGPARSE_group (303, N_("@\nExamples:\n\n"
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" blurb\n"
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" blurb\n")),
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/* Hidden options. */
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ARGPARSE_s_n (oNoVerbose, "no-verbose", "@"),
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ARGPARSE_s_n (oNoSecmemWarn, "no-secmem-warning", "@"),
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ARGPARSE_s_n (oNoGreeting, "no-greeting", "@"),
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ARGPARSE_s_n (oNoOptions, "no-options", "@"),
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ARGPARSE_s_s (oHomedir, "homedir", "@"),
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ARGPARSE_s_s (oAgentProgram, "agent-program", "@"),
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ARGPARSE_s_s (oGpgProgram, "gpg-program", "@"),
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ARGPARSE_s_s (oDisplay, "display", "@"),
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ARGPARSE_s_s (oTTYname, "ttyname", "@"),
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ARGPARSE_s_s (oTTYtype, "ttytype", "@"),
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ARGPARSE_s_s (oLCctype, "lc-ctype", "@"),
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ARGPARSE_s_s (oLCmessages, "lc-messages", "@"),
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ARGPARSE_s_s (oXauthority, "xauthority", "@"),
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ARGPARSE_s_s (oFakedSystemTime, "faked-system-time", "@"),
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ARGPARSE_s_n (oWithColons, "with-colons", "@"),
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ARGPARSE_s_n (oNoRandomSeedFile, "no-random-seed-file", "@"),
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/* Command aliases. */
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ARGPARSE_end ()
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};
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/* The timer tick interval used by the idle task. */
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#define TIMERTICK_INTERVAL_SEC (1)
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/* Global variable to keep an error count. */
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int g13_errors_seen = 0;
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/* It is possible that we are currently running under setuid permissions. */
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static int maybe_setuid = 1;
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/* Helper to implement --debug-level and --debug. */
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static const char *debug_level;
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static unsigned int debug_value;
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/* Flag to indicate that a shutdown was requested. */
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static int shutdown_pending;
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/* The thread id of the idle task. */
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static pth_t idle_task_tid;
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static void set_cmd (enum cmd_and_opt_values *ret_cmd,
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enum cmd_and_opt_values new_cmd );
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static void emergency_cleanup (void);
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static void start_idle_task (void);
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static void join_idle_task (void);
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/* Begin Pth wrapper functions. */
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ASSUAN_SYSTEM_PTH_IMPL;
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GCRY_THREAD_OPTION_PTH_IMPL;
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static int fixed_gcry_pth_init (void)
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{
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return pth_self ()? 0 : (pth_init () == FALSE) ? errno : 0;
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}
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/* End Pth wrapper functions. */
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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 11: p = "g13 (GnuPG)";
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break;
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case 13: p = VERSION; break;
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case 17: p = PRINTABLE_OS_NAME; break;
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case 19: p = _("Please report bugs to <" PACKAGE_BUGREPORT ">.\n");
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break;
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case 1:
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case 40: p = _("Usage: g13 [options] [files] (-h for help)");
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break;
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case 41:
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p = _("Syntax: g13 [options] [files]\n"
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"Create, mount or unmount an encrypted file system container\n");
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break;
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case 31: p = "\nHome: "; break;
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case 32: p = opt.homedir; 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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wrong_args (const char *text)
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{
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fputs (_("usage: g13 [options] "), stderr);
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fputs (text, stderr);
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putc ('\n', stderr);
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g13_exit (2);
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}
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/* Setup the debugging. With a DEBUG_LEVEL of NULL only the active
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debug flags are propagated to the subsystems. With DEBUG_LEVEL
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set, a specific set of debug flags is set; and individual debugging
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flags will be added on top. */
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static void
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set_debug (void)
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{
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int numok = (debug_level && digitp (debug_level));
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int numlvl = numok? atoi (debug_level) : 0;
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if (!debug_level)
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;
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else if (!strcmp (debug_level, "none") || (numok && numlvl < 1))
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opt.debug = 0;
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else if (!strcmp (debug_level, "basic") || (numok && numlvl <= 2))
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opt.debug = DBG_ASSUAN_VALUE|DBG_MOUNT_VALUE;
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else if (!strcmp (debug_level, "advanced") || (numok && numlvl <= 5))
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opt.debug = DBG_ASSUAN_VALUE|DBG_MOUNT_VALUE;
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else if (!strcmp (debug_level, "expert") || (numok && numlvl <= 8))
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opt.debug = (DBG_ASSUAN_VALUE|DBG_MOUNT_VALUE|DBG_CRYPTO_VALUE);
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else if (!strcmp (debug_level, "guru") || numok)
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{
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opt.debug = ~0;
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/* if (numok) */
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/* opt.debug &= ~(DBG_HASHING_VALUE); */
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}
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else
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{
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log_error (_("invalid debug-level `%s' given\n"), debug_level);
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g13_exit(2);
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}
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opt.debug |= debug_value;
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if (opt.debug && !opt.verbose)
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opt.verbose = 1;
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if (opt.debug)
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opt.quiet = 0;
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if (opt.debug & DBG_CRYPTO_VALUE )
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gcry_control (GCRYCTL_SET_DEBUG_FLAGS, 1);
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gcry_control (GCRYCTL_SET_VERBOSITY, (int)opt.verbose);
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if (opt.debug)
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log_info ("enabled debug flags:%s%s%s%s%s\n",
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(opt.debug & DBG_MOUNT_VALUE )? " mount":"",
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(opt.debug & DBG_CRYPTO_VALUE )? " crypto":"",
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(opt.debug & DBG_MEMORY_VALUE )? " memory":"",
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(opt.debug & DBG_MEMSTAT_VALUE)? " memstat":"",
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(opt.debug & DBG_ASSUAN_VALUE )? " assuan":"");
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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 cmd = *ret_cmd;
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if (!cmd || cmd == new_cmd)
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cmd = new_cmd;
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else
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{
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log_error (_("conflicting commands\n"));
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g13_exit (2);
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}
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*ret_cmd = cmd;
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}
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int
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main ( int argc, char **argv)
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{
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ARGPARSE_ARGS pargs;
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int orig_argc;
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char **orig_argv;
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gpg_error_t err;
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const char *fname;
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int may_coredump;
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FILE *configfp = NULL;
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char *configname = NULL;
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unsigned configlineno;
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int parse_debug = 0;
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int no_more_options = 0;
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int default_config =1;
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char *logfile = NULL;
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int greeting = 0;
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int nogreeting = 0;
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int debug_wait = 0;
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int use_random_seed = 1;
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int nodetach = 0;
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int nokeysetup = 0;
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enum cmd_and_opt_values cmd = 0;
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struct server_control_s ctrl;
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strlist_t recipients = NULL;
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/*mtrace();*/
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gnupg_reopen_std ("g13");
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set_strusage (my_strusage);
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gcry_control (GCRYCTL_SUSPEND_SECMEM_WARN);
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log_set_prefix ("g13", 1);
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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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/* Libgcrypt requires us to register the threading model first.
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Note that this will also do the pth_init. */
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gcry_threads_pth.init = fixed_gcry_pth_init;
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err = gcry_control (GCRYCTL_SET_THREAD_CBS, &gcry_threads_pth);
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if (err)
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{
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log_fatal ("can't register GNU Pth with Libgcrypt: %s\n",
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gpg_strerror (err));
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}
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/* Check that the Libgcrypt is suitable. */
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if (!gcry_check_version (NEED_LIBGCRYPT_VERSION) )
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log_fatal (_("%s is too old (need %s, have %s)\n"), "libgcrypt",
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NEED_LIBGCRYPT_VERSION, gcry_check_version (NULL) );
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/* Take extra care of the random pool. */
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gcry_control (GCRYCTL_USE_SECURE_RNDPOOL);
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may_coredump = disable_core_dumps ();
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gnupg_init_signals (0, emergency_cleanup);
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dotlock_create (NULL); /* Register locking cleanup. */
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opt.session_env = session_env_new ();
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if (!opt.session_env)
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log_fatal ("error allocating session environment block: %s\n",
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strerror (errno));
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opt.homedir = default_homedir ();
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||
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/* First check whether we have a config file on the commandline. */
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orig_argc = argc;
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orig_argv = argv;
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pargs.argc = &argc;
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pargs.argv = &argv;
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pargs.flags= 1|(1<<6); /* Do not remove the args, ignore version. */
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while (arg_parse( &pargs, opts))
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{
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if (pargs.r_opt == oDebug || pargs.r_opt == oDebugAll)
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parse_debug++;
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else if (pargs.r_opt == oOptions)
|
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{ /* Yes, there is one, so we do not try the default one but
|
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read the config file when it is encountered at the
|
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commandline. */
|
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default_config = 0;
|
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}
|
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else if (pargs.r_opt == oNoOptions)
|
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default_config = 0; /* --no-options */
|
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else if (pargs.r_opt == oHomedir)
|
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opt.homedir = pargs.r.ret_str;
|
||
}
|
||
|
||
/* Initialize the secure memory. */
|
||
gcry_control (GCRYCTL_INIT_SECMEM, 16384, 0);
|
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maybe_setuid = 0;
|
||
|
||
/*
|
||
Now we are now working under our real uid
|
||
*/
|
||
|
||
/* Setup malloc hooks. */
|
||
{
|
||
struct assuan_malloc_hooks malloc_hooks;
|
||
|
||
malloc_hooks.malloc = gcry_malloc;
|
||
malloc_hooks.realloc = gcry_realloc;
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||
malloc_hooks.free = gcry_free;
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||
assuan_set_malloc_hooks (&malloc_hooks);
|
||
}
|
||
|
||
/* Prepare libassuan. */
|
||
assuan_set_gpg_err_source (GPG_ERR_SOURCE_DEFAULT);
|
||
assuan_set_system_hooks (ASSUAN_SYSTEM_PTH);
|
||
setup_libassuan_logging (&opt.debug);
|
||
|
||
/* Setup a default control structure for command line mode. */
|
||
memset (&ctrl, 0, sizeof ctrl);
|
||
g13_init_default_ctrl (&ctrl);
|
||
ctrl.no_server = 1;
|
||
ctrl.status_fd = -1; /* No status output. */
|
||
|
||
/* Set the default option file */
|
||
if (default_config )
|
||
configname = make_filename (opt.homedir, "g13.conf", NULL);
|
||
|
||
argc = orig_argc;
|
||
argv = orig_argv;
|
||
pargs.argc = &argc;
|
||
pargs.argv = &argv;
|
||
pargs.flags = 1; /* Do not remove the args. */
|
||
|
||
next_pass:
|
||
if (configname)
|
||
{
|
||
configlineno = 0;
|
||
configfp = fopen (configname, "r");
|
||
if (!configfp)
|
||
{
|
||
if (default_config)
|
||
{
|
||
if (parse_debug)
|
||
log_info (_("NOTE: no default option file `%s'\n"), configname);
|
||
}
|
||
else
|
||
{
|
||
log_error (_("option file `%s': %s\n"),
|
||
configname, strerror(errno));
|
||
g13_exit(2);
|
||
}
|
||
xfree (configname);
|
||
configname = NULL;
|
||
}
|
||
if (parse_debug && configname)
|
||
log_info (_("reading options from `%s'\n"), configname);
|
||
default_config = 0;
|
||
}
|
||
|
||
while (!no_more_options
|
||
&& optfile_parse (configfp, configname, &configlineno, &pargs, opts))
|
||
{
|
||
switch (pargs.r_opt)
|
||
{
|
||
case aGPGConfList:
|
||
case aGPGConfTest:
|
||
set_cmd (&cmd, pargs.r_opt);
|
||
nogreeting = 1;
|
||
nokeysetup = 1;
|
||
break;
|
||
|
||
case aServer:
|
||
case aMount:
|
||
case aUmount:
|
||
nokeysetup = 1;
|
||
case aCreate:
|
||
set_cmd (&cmd, pargs.r_opt);
|
||
break;
|
||
|
||
case oOutput: opt.outfile = pargs.r.ret_str; break;
|
||
|
||
case oQuiet: opt.quiet = 1; break;
|
||
case oNoGreeting: nogreeting = 1; break;
|
||
case oNoTTY: break;
|
||
|
||
case oDryRun: opt.dry_run = 1; break;
|
||
|
||
case oVerbose:
|
||
opt.verbose++;
|
||
gcry_control (GCRYCTL_SET_VERBOSITY, (int)opt.verbose);
|
||
break;
|
||
case oNoVerbose:
|
||
opt.verbose = 0;
|
||
gcry_control (GCRYCTL_SET_VERBOSITY, (int)opt.verbose);
|
||
break;
|
||
|
||
case oLogFile: logfile = pargs.r.ret_str; break;
|
||
case oNoLogFile: logfile = NULL; break;
|
||
|
||
case oNoDetach: nodetach = 1; break;
|
||
|
||
case oDebug: debug_value |= pargs.r.ret_ulong; break;
|
||
case oDebugAll: debug_value = ~0; break;
|
||
case oDebugNone: debug_value = 0; break;
|
||
case oDebugLevel: debug_level = pargs.r.ret_str; break;
|
||
case oDebugWait: debug_wait = pargs.r.ret_int; break;
|
||
case oDebugAllowCoreDump:
|
||
may_coredump = enable_core_dumps ();
|
||
break;
|
||
|
||
case oStatusFD: ctrl.status_fd = pargs.r.ret_int; break;
|
||
case oLoggerFD: log_set_fd (pargs.r.ret_int ); break;
|
||
|
||
case oNoOptions: break; /* no-options */
|
||
case oOptions:
|
||
/* Config files may not be nested (silently ignore them). */
|
||
if (!configfp)
|
||
{
|
||
xfree(configname);
|
||
configname = xstrdup (pargs.r.ret_str);
|
||
goto next_pass;
|
||
}
|
||
break;
|
||
|
||
case oHomedir: opt.homedir = pargs.r.ret_str; break;
|
||
|
||
case oAgentProgram: opt.agent_program = pargs.r.ret_str; break;
|
||
case oGpgProgram: opt.gpg_program = pargs.r.ret_str; break;
|
||
case oDisplay: opt.display = xstrdup (pargs.r.ret_str); break;
|
||
case oTTYname: opt.ttyname = xstrdup (pargs.r.ret_str); break;
|
||
case oTTYtype: opt.ttytype = xstrdup (pargs.r.ret_str); break;
|
||
case oLCctype: opt.lc_ctype = xstrdup (pargs.r.ret_str); break;
|
||
case oLCmessages: opt.lc_messages = xstrdup (pargs.r.ret_str); break;
|
||
case oXauthority: opt.xauthority = xstrdup (pargs.r.ret_str); break;
|
||
|
||
case oFakedSystemTime:
|
||
{
|
||
time_t faked_time = isotime2epoch (pargs.r.ret_str);
|
||
if (faked_time == (time_t)(-1))
|
||
faked_time = (time_t)strtoul (pargs.r.ret_str, NULL, 10);
|
||
gnupg_set_time (faked_time, 0);
|
||
}
|
||
break;
|
||
|
||
case oNoSecmemWarn: gcry_control (GCRYCTL_DISABLE_SECMEM_WARN); break;
|
||
|
||
case oNoRandomSeedFile: use_random_seed = 0; break;
|
||
|
||
case oRecipient: /* Store the encryption key. */
|
||
add_to_strlist (&recipients, pargs.r.ret_str);
|
||
break;
|
||
|
||
|
||
default:
|
||
pargs.err = configfp? ARGPARSE_PRINT_WARNING:ARGPARSE_PRINT_ERROR;
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (configfp)
|
||
{
|
||
fclose (configfp);
|
||
configfp = NULL;
|
||
/* Keep a copy of the config filename. */
|
||
opt.config_filename = configname;
|
||
configname = NULL;
|
||
goto next_pass;
|
||
}
|
||
xfree (configname);
|
||
configname = NULL;
|
||
|
||
if (!opt.config_filename)
|
||
opt.config_filename = make_filename (opt.homedir, "g13.conf", NULL);
|
||
|
||
if (log_get_errorcount(0))
|
||
g13_exit(2);
|
||
|
||
/* Now that we have the options parsed we need to update the default
|
||
control structure. */
|
||
g13_init_default_ctrl (&ctrl);
|
||
|
||
if (nogreeting)
|
||
greeting = 0;
|
||
|
||
if (greeting)
|
||
{
|
||
fprintf (stderr, "%s %s; %s\n",
|
||
strusage(11), strusage(13), strusage(14) );
|
||
fprintf (stderr, "%s\n", strusage(15) );
|
||
}
|
||
|
||
if (may_coredump && !opt.quiet)
|
||
log_info (_("WARNING: program may create a core file!\n"));
|
||
|
||
if (logfile)
|
||
{
|
||
log_set_file (logfile);
|
||
log_set_prefix (NULL, 1|2|4);
|
||
}
|
||
|
||
if (gnupg_faked_time_p ())
|
||
{
|
||
gnupg_isotime_t tbuf;
|
||
|
||
log_info (_("WARNING: running with faked system time: "));
|
||
gnupg_get_isotime (tbuf);
|
||
dump_isotime (tbuf);
|
||
log_printf ("\n");
|
||
}
|
||
|
||
/* Print any pending secure memory warnings. */
|
||
gcry_control (GCRYCTL_RESUME_SECMEM_WARN);
|
||
|
||
/* Setup the debug flags for all subsystems. */
|
||
set_debug ();
|
||
|
||
/* Install a regular exit handler to make real sure that the secure
|
||
memory gets wiped out. */
|
||
if (atexit (emergency_cleanup))
|
||
{
|
||
log_error ("atexit failed\n");
|
||
g13_exit (2);
|
||
}
|
||
|
||
/* Terminate if we found any error until now. */
|
||
if (log_get_errorcount(0))
|
||
g13_exit (2);
|
||
|
||
/* Set the standard GnuPG random seed file. */
|
||
if (use_random_seed)
|
||
{
|
||
char *p = make_filename (opt.homedir, "random_seed", NULL);
|
||
gcry_control (GCRYCTL_SET_RANDOM_SEED_FILE, p);
|
||
xfree(p);
|
||
}
|
||
|
||
/* Store given filename into FNAME. */
|
||
fname = argc? *argv : NULL;
|
||
|
||
/* Parse all given encryption keys. This does a lookup of the keys
|
||
and stops if any of the given keys was not found. */
|
||
#if 0 /* Currently not implemented. */
|
||
if (!nokeysetup)
|
||
{
|
||
strlist_t sl;
|
||
int failed = 0;
|
||
|
||
for (sl = recipients; sl; sl = sl->next)
|
||
if (check_encryption_key ())
|
||
failed = 1;
|
||
if (failed)
|
||
g13_exit (1);
|
||
}
|
||
#endif /*0*/
|
||
|
||
/* Dispatch command. */
|
||
switch (cmd)
|
||
{
|
||
case aGPGConfList:
|
||
{ /* List options and default values in the GPG Conf format. */
|
||
char *config_filename_esc = percent_escape (opt.config_filename, NULL);
|
||
|
||
printf ("gpgconf-g13.conf:%lu:\"%s\n",
|
||
GC_OPT_FLAG_DEFAULT, config_filename_esc);
|
||
xfree (config_filename_esc);
|
||
|
||
printf ("verbose:%lu:\n", GC_OPT_FLAG_NONE);
|
||
printf ("quiet:%lu:\n", GC_OPT_FLAG_NONE);
|
||
printf ("debug-level:%lu:\"none:\n", GC_OPT_FLAG_DEFAULT);
|
||
printf ("log-file:%lu:\n", GC_OPT_FLAG_NONE);
|
||
}
|
||
break;
|
||
case aGPGConfTest:
|
||
/* This is merely a dummy command to test whether the
|
||
configuration file is valid. */
|
||
break;
|
||
|
||
case aServer:
|
||
{
|
||
start_idle_task ();
|
||
ctrl.no_server = 0;
|
||
err = g13_server (&ctrl);
|
||
if (err)
|
||
log_error ("server exited with error: %s <%s>\n",
|
||
gpg_strerror (err), gpg_strsource (err));
|
||
else
|
||
shutdown_pending++;
|
||
}
|
||
break;
|
||
|
||
case aCreate: /* Create a new container. */
|
||
{
|
||
if (argc != 1)
|
||
wrong_args ("--create filename");
|
||
start_idle_task ();
|
||
err = g13_create_container (&ctrl, argv[0], recipients);
|
||
if (err)
|
||
log_error ("error creating a new container: %s <%s>\n",
|
||
gpg_strerror (err), gpg_strsource (err));
|
||
else
|
||
shutdown_pending++;
|
||
}
|
||
break;
|
||
|
||
case aMount: /* Mount a container. */
|
||
{
|
||
if (argc != 1 && argc != 2 )
|
||
wrong_args ("--mount filename [mountpoint]");
|
||
start_idle_task ();
|
||
err = g13_mount_container (&ctrl, argv[0], argc == 2?argv[1]:NULL);
|
||
if (err)
|
||
log_error ("error mounting container `%s': %s <%s>\n",
|
||
*argv, gpg_strerror (err), gpg_strsource (err));
|
||
}
|
||
break;
|
||
|
||
default:
|
||
log_error (_("invalid command (there is no implicit command)\n"));
|
||
break;
|
||
}
|
||
|
||
if (!err)
|
||
join_idle_task ();
|
||
|
||
/* Cleanup. */
|
||
g13_exit (0);
|
||
return 8; /*NOTREACHED*/
|
||
}
|
||
|
||
|
||
/* Note: This function is used by signal handlers!. */
|
||
static void
|
||
emergency_cleanup (void)
|
||
{
|
||
gcry_control (GCRYCTL_TERM_SECMEM );
|
||
}
|
||
|
||
|
||
void
|
||
g13_exit (int rc)
|
||
{
|
||
gcry_control (GCRYCTL_UPDATE_RANDOM_SEED_FILE);
|
||
if (opt.debug & DBG_MEMSTAT_VALUE)
|
||
{
|
||
gcry_control( GCRYCTL_DUMP_MEMORY_STATS );
|
||
gcry_control( GCRYCTL_DUMP_RANDOM_STATS );
|
||
}
|
||
if (opt.debug)
|
||
gcry_control (GCRYCTL_DUMP_SECMEM_STATS );
|
||
emergency_cleanup ();
|
||
rc = rc? rc : log_get_errorcount(0)? 2 : g13_errors_seen? 1 : 0;
|
||
exit (rc);
|
||
}
|
||
|
||
|
||
/* Store defaults into the per-connection CTRL object. */
|
||
void
|
||
g13_init_default_ctrl (struct server_control_s *ctrl)
|
||
{
|
||
ctrl->conttype = CONTTYPE_ENCFS;
|
||
}
|
||
|
||
|
||
/* This function is called for each signal we catch. It is run in the
|
||
main context or the one of a Pth thread and thus it is not
|
||
restricted in what it may do. */
|
||
static void
|
||
handle_signal (int signo)
|
||
{
|
||
switch (signo)
|
||
{
|
||
#ifndef HAVE_W32_SYSTEM
|
||
case SIGHUP:
|
||
log_info ("SIGHUP received - re-reading configuration\n");
|
||
/* Fixme: Not yet implemented. */
|
||
break;
|
||
|
||
case SIGUSR1:
|
||
log_info ("SIGUSR1 received - printing internal information:\n");
|
||
/* Fixme: We need to see how to integrate pth dumping into our
|
||
logging system. */
|
||
/* pth_ctrl (PTH_CTRL_DUMPSTATE, log_get_stream ()); */
|
||
mountinfo_dump_all ();
|
||
break;
|
||
|
||
case SIGUSR2:
|
||
log_info ("SIGUSR2 received - no action defined\n");
|
||
break;
|
||
|
||
case SIGTERM:
|
||
if (!shutdown_pending)
|
||
log_info ("SIGTERM received - shutting down ...\n");
|
||
else
|
||
log_info ("SIGTERM received - still %u runners active\n",
|
||
runner_get_threads ());
|
||
shutdown_pending++;
|
||
if (shutdown_pending > 2)
|
||
{
|
||
log_info ("shutdown forced\n");
|
||
log_info ("%s %s stopped\n", strusage(11), strusage(13) );
|
||
g13_exit (0);
|
||
}
|
||
break;
|
||
|
||
case SIGINT:
|
||
log_info ("SIGINT received - immediate shutdown\n");
|
||
log_info( "%s %s stopped\n", strusage(11), strusage(13));
|
||
g13_exit (0);
|
||
break;
|
||
#endif /*!HAVE_W32_SYSTEM*/
|
||
|
||
default:
|
||
log_info ("signal %d received - no action defined\n", signo);
|
||
}
|
||
}
|
||
|
||
|
||
/* This ticker function is called about every TIMERTICK_INTERVAL_SEC
|
||
seconds. */
|
||
static void
|
||
handle_tick (void)
|
||
{
|
||
/* log_debug ("TICK\n"); */
|
||
}
|
||
|
||
|
||
/* The idle task. We use a separate thread to do idle stuff and to
|
||
catch signals. */
|
||
static void *
|
||
idle_task (void *dummy_arg)
|
||
{
|
||
sigset_t sigs; /* The set of signals we want to catch. */
|
||
pth_event_t ev; /* The main event to catch signals. */
|
||
pth_event_t time_ev; /* The time event. */
|
||
int signo; /* The number of a raised signal is stored here. */
|
||
|
||
(void)dummy_arg;
|
||
|
||
/* Create the event to catch the signals. */
|
||
#ifndef HAVE_W32_SYSTEM
|
||
sigemptyset (&sigs );
|
||
sigaddset (&sigs, SIGHUP);
|
||
sigaddset (&sigs, SIGUSR1);
|
||
sigaddset (&sigs, SIGUSR2);
|
||
sigaddset (&sigs, SIGINT);
|
||
sigaddset (&sigs, SIGTERM);
|
||
pth_sigmask (SIG_UNBLOCK, &sigs, NULL);
|
||
#else
|
||
sigs = 0;
|
||
#endif
|
||
ev = pth_event (PTH_EVENT_SIGS, &sigs, &signo);
|
||
|
||
/* The time event neds to computed n tghe fly. */
|
||
time_ev = NULL;
|
||
|
||
for (;;)
|
||
{
|
||
/* The shutdown flag allows us to terminate the idle task. */
|
||
if (shutdown_pending)
|
||
{
|
||
runner_cancel_all ();
|
||
|
||
if (!runner_get_threads ())
|
||
break; /* ready */
|
||
}
|
||
|
||
/* Create a timeout event if needed. To help with power saving
|
||
we syncronize the ticks to the next full second. */
|
||
if (!time_ev)
|
||
{
|
||
pth_time_t nexttick;
|
||
|
||
nexttick = pth_timeout (TIMERTICK_INTERVAL_SEC, 0);
|
||
if (nexttick.tv_usec > 10) /* Use a 10 usec threshhold. */
|
||
{
|
||
nexttick.tv_sec++;
|
||
nexttick.tv_usec = 0;
|
||
}
|
||
time_ev = pth_event (PTH_EVENT_TIME, nexttick);
|
||
}
|
||
|
||
pth_event_concat (ev, time_ev, NULL);
|
||
pth_wait (ev);
|
||
pth_event_isolate (time_ev);
|
||
|
||
if (pth_event_occurred (ev))
|
||
{
|
||
handle_signal (signo);
|
||
}
|
||
|
||
if (time_ev && pth_event_occurred (time_ev))
|
||
{
|
||
pth_event_free (time_ev, PTH_FREE_ALL);
|
||
time_ev = NULL;
|
||
handle_tick ();
|
||
}
|
||
}
|
||
|
||
pth_event_free (ev, PTH_FREE_ALL);
|
||
if (time_ev)
|
||
pth_event_free (time_ev, PTH_FREE_ALL);
|
||
log_info (_("%s %s stopped\n"), strusage(11), strusage(13));
|
||
return NULL;
|
||
}
|
||
|
||
|
||
/* Start the idle task. */
|
||
static void
|
||
start_idle_task (void)
|
||
{
|
||
pth_attr_t tattr;
|
||
pth_t tid;
|
||
|
||
tattr = pth_attr_new ();
|
||
pth_attr_set (tattr, PTH_ATTR_JOINABLE, 1);
|
||
pth_attr_set (tattr, PTH_ATTR_STACK_SIZE, 64*1024);
|
||
pth_attr_set (tattr, PTH_ATTR_NAME, "idle-task");
|
||
|
||
tid = pth_spawn (tattr, idle_task, NULL);
|
||
if (!tid)
|
||
{
|
||
log_fatal ("error starting idle task: %s\n",
|
||
gpg_strerror (gpg_error_from_syserror ()));
|
||
return; /*NOTREACHED*/
|
||
}
|
||
idle_task_tid = tid;
|
||
pth_attr_destroy (tattr);
|
||
}
|
||
|
||
|
||
/* Wait for the idle task to finish. */
|
||
static void
|
||
join_idle_task (void)
|
||
{
|
||
if (idle_task_tid)
|
||
{
|
||
if (!pth_join (idle_task_tid, NULL))
|
||
log_error ("waiting for idle task thread failed: %s\n",
|
||
gpg_strerror (gpg_error_from_syserror ()));
|
||
}
|
||
}
|