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b008274afd
We better do this once and for all instead of cluttering all future commits with diffs of trailing white spaces. In the majority of cases blank or single lines are affected and thus this change won't disturb a git blame too much. For future commits the pre-commit scripts checks that this won't happen again.
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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create_dotlock (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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/* 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;
|
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}
|
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|
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/* Initialize the secure memory. */
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gcry_control (GCRYCTL_INIT_SECMEM, 16384, 0);
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maybe_setuid = 0;
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/*
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Now we are now working under our real uid
|
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*/
|
||
|
||
/* Setup malloc hooks. */
|
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{
|
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struct assuan_malloc_hooks malloc_hooks;
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malloc_hooks.malloc = gcry_malloc;
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malloc_hooks.realloc = gcry_realloc;
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malloc_hooks.free = gcry_free;
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assuan_set_malloc_hooks (&malloc_hooks);
|
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}
|
||
|
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/* Prepare libassuan. */
|
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assuan_set_gpg_err_source (GPG_ERR_SOURCE_DEFAULT);
|
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assuan_set_system_hooks (ASSUAN_SYSTEM_PTH);
|
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setup_libassuan_logging (&opt.debug);
|
||
|
||
/* Setup a default control structure for command line mode. */
|
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memset (&ctrl, 0, sizeof ctrl);
|
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g13_init_default_ctrl (&ctrl);
|
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ctrl.no_server = 1;
|
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ctrl.status_fd = -1; /* No status output. */
|
||
|
||
/* Set the default option file */
|
||
if (default_config )
|
||
configname = make_filename (opt.homedir, "g13.conf", NULL);
|
||
|
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argc = orig_argc;
|
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argv = orig_argv;
|
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pargs.argc = &argc;
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pargs.argv = &argv;
|
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pargs.flags = 1; /* Do not remove the args. */
|
||
|
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next_pass:
|
||
if (configname)
|
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{
|
||
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)
|
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log_info (_("reading options from `%s'\n"), configname);
|
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default_config = 0;
|
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}
|
||
|
||
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 ()));
|
||
}
|
||
}
|