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1.1 ! tomglok 1: /*
! 2: * ngIRCd -- The Next Generation IRC Daemon
! 3: * Copyright (c)2001-2021 Alexander Barton (alex@barton.de) and Contributors.
! 4: *
! 5: * This program is free software; you can redistribute it and/or modify
! 6: * it under the terms of the GNU General Public License as published by
! 7: * the Free Software Foundation; either version 2 of the License, or
! 8: * (at your option) any later version.
! 9: * Please read the file COPYING, README and AUTHORS for more information.
! 10: */
! 11:
! 12: #define GLOBAL_INIT
! 13: #include "portab.h"
! 14:
! 15: /**
! 16: * @file
! 17: * The main program, including the C function main() which is called
! 18: * by the loader of the operating system.
! 19: */
! 20:
! 21: #include <assert.h>
! 22: #include <errno.h>
! 23: #include <stdio.h>
! 24: #include <stdlib.h>
! 25: #include <string.h>
! 26: #include <unistd.h>
! 27: #include <time.h>
! 28: #include <sys/types.h>
! 29: #include <sys/stat.h>
! 30: #include <fcntl.h>
! 31: #include <pwd.h>
! 32: #include <grp.h>
! 33:
! 34: #if defined(DEBUG) && defined(HAVE_MTRACE)
! 35: #include <mcheck.h>
! 36: #endif
! 37:
! 38: #include "conn.h"
! 39: #include "class.h"
! 40: #include "channel.h"
! 41: #include "conf.h"
! 42: #include "log.h"
! 43: #include "sighandlers.h"
! 44: #include "io.h"
! 45:
! 46: #include "ngircd.h"
! 47:
! 48: static void Show_Version PARAMS(( void ));
! 49: static void Show_Help PARAMS(( void ));
! 50:
! 51: static void Pidfile_Create PARAMS(( pid_t pid ));
! 52: static void Pidfile_Delete PARAMS(( void ));
! 53:
! 54: static void Fill_Version PARAMS(( void ));
! 55:
! 56: static void Random_Init PARAMS(( void ));
! 57:
! 58: static void Setup_FDStreams PARAMS(( int fd ));
! 59:
! 60: static bool NGIRCd_Init PARAMS(( bool ));
! 61:
! 62:
! 63: /**
! 64: * The main() function of ngIRCd.
! 65: *
! 66: * Here all starts: this function is called by the operating system loader,
! 67: * it is the first portion of code executed of ngIRCd.
! 68: *
! 69: * @param argc The number of arguments passed to ngIRCd on the command line.
! 70: * @param argv An array containing all the arguments passed to ngIRCd.
! 71: * @return Global exit code of ngIRCd, zero on success.
! 72: */
! 73: GLOBAL int
! 74: main(int argc, const char *argv[])
! 75: {
! 76: bool ok, configtest = false;
! 77: bool NGIRCd_NoDaemon = false;
! 78: int i;
! 79: size_t n;
! 80:
! 81: #if defined(DEBUG) && defined(HAVE_MTRACE)
! 82: /* enable GNU libc memory tracing when running in debug mode
! 83: * and functionality available */
! 84: mtrace();
! 85: #endif
! 86:
! 87: umask(0077);
! 88:
! 89: NGIRCd_SignalQuit = NGIRCd_SignalRestart = false;
! 90: NGIRCd_Passive = false;
! 91: #ifdef DEBUG
! 92: NGIRCd_Debug = false;
! 93: #endif
! 94: #ifdef SNIFFER
! 95: NGIRCd_Sniffer = false;
! 96: #endif
! 97: strlcpy(NGIRCd_ConfFile, SYSCONFDIR, sizeof(NGIRCd_ConfFile));
! 98: strlcat(NGIRCd_ConfFile, CONFIG_FILE, sizeof(NGIRCd_ConfFile));
! 99:
! 100: Fill_Version();
! 101:
! 102: /* parse conmmand line */
! 103: for (i = 1; i < argc; i++) {
! 104: ok = false;
! 105: if (argv[i][0] == '-' && argv[i][1] == '-') {
! 106: /* long option */
! 107: if (strcmp(argv[i], "--config") == 0) {
! 108: if (i + 1 < argc) {
! 109: /* Ok, there's an parameter left */
! 110: strlcpy(NGIRCd_ConfFile, argv[i+1],
! 111: sizeof(NGIRCd_ConfFile));
! 112: /* next parameter */
! 113: i++; ok = true;
! 114: }
! 115: }
! 116: if (strcmp(argv[i], "--configtest") == 0) {
! 117: configtest = true;
! 118: ok = true;
! 119: }
! 120: #ifdef DEBUG
! 121: if (strcmp(argv[i], "--debug") == 0) {
! 122: NGIRCd_Debug = true;
! 123: ok = true;
! 124: }
! 125: #endif
! 126: if (strcmp(argv[i], "--help") == 0) {
! 127: Show_Version();
! 128: puts(""); Show_Help( ); puts( "" );
! 129: exit(0);
! 130: }
! 131: if (strcmp(argv[i], "--nodaemon") == 0) {
! 132: NGIRCd_NoDaemon = true;
! 133: ok = true;
! 134: }
! 135: if (strcmp(argv[i], "--passive") == 0) {
! 136: NGIRCd_Passive = true;
! 137: ok = true;
! 138: }
! 139: #ifdef SNIFFER
! 140: if (strcmp(argv[i], "--sniffer") == 0) {
! 141: NGIRCd_Sniffer = true;
! 142: ok = true;
! 143: }
! 144: #endif
! 145: if (strcmp(argv[i], "--version") == 0) {
! 146: Show_Version();
! 147: exit(0);
! 148: }
! 149: }
! 150: else if(argv[i][0] == '-' && argv[i][1] != '-') {
! 151: /* short option */
! 152: for (n = 1; n < strlen(argv[i]); n++) {
! 153: ok = false;
! 154: #ifdef DEBUG
! 155: if (argv[i][n] == 'd') {
! 156: NGIRCd_Debug = true;
! 157: ok = true;
! 158: }
! 159: #endif
! 160: if (argv[i][n] == 'f') {
! 161: if (!argv[i][n+1] && i+1 < argc) {
! 162: /* Ok, next character is a blank */
! 163: strlcpy(NGIRCd_ConfFile, argv[i+1],
! 164: sizeof(NGIRCd_ConfFile));
! 165:
! 166: /* go to the following parameter */
! 167: i++;
! 168: n = strlen(argv[i]);
! 169: ok = true;
! 170: }
! 171: }
! 172:
! 173: if (argv[i][n] == 'h') {
! 174: Show_Version();
! 175: puts(""); Show_Help(); puts("");
! 176: exit(1);
! 177: }
! 178:
! 179: if (argv[i][n] == 'n') {
! 180: NGIRCd_NoDaemon = true;
! 181: ok = true;
! 182: }
! 183: if (argv[i][n] == 'p') {
! 184: NGIRCd_Passive = true;
! 185: ok = true;
! 186: }
! 187: #ifdef SNIFFER
! 188: if (argv[i][n] == 's') {
! 189: NGIRCd_Sniffer = true;
! 190: ok = true;
! 191: }
! 192: #endif
! 193: if (argv[i][n] == 't') {
! 194: configtest = true;
! 195: ok = true;
! 196: }
! 197:
! 198: if (argv[i][n] == 'V') {
! 199: Show_Version();
! 200: exit(1);
! 201: }
! 202:
! 203: if (!ok) {
! 204: fprintf(stderr,
! 205: "%s: invalid option \"-%c\"!\n",
! 206: PACKAGE_NAME, argv[i][n]);
! 207: fprintf(stderr,
! 208: "Try \"%s --help\" for more information.\n",
! 209: PACKAGE_NAME);
! 210: exit(2);
! 211: }
! 212: }
! 213:
! 214: }
! 215: if (!ok) {
! 216: fprintf(stderr, "%s: invalid option \"%s\"!\n",
! 217: PACKAGE_NAME, argv[i]);
! 218: fprintf(stderr, "Try \"%s --help\" for more information.\n",
! 219: PACKAGE_NAME);
! 220: exit(2);
! 221: }
! 222: }
! 223:
! 224: /* Debug level for "VERSION" command */
! 225: NGIRCd_DebugLevel[0] = '\0';
! 226: #ifdef DEBUG
! 227: if (NGIRCd_Debug)
! 228: strcpy(NGIRCd_DebugLevel, "1");
! 229: #endif
! 230: #ifdef SNIFFER
! 231: if (NGIRCd_Sniffer) {
! 232: NGIRCd_Debug = true;
! 233: strcpy(NGIRCd_DebugLevel, "2");
! 234: }
! 235: #endif
! 236:
! 237: if (configtest) {
! 238: Show_Version(); puts("");
! 239: exit(Conf_Test());
! 240: }
! 241:
! 242: while (!NGIRCd_SignalQuit) {
! 243: /* Initialize global variables */
! 244: NGIRCd_Start = time(NULL);
! 245: (void)strftime(NGIRCd_StartStr, 64,
! 246: "%a %b %d %Y at %H:%M:%S (%Z)",
! 247: localtime(&NGIRCd_Start));
! 248:
! 249: NGIRCd_SignalRestart = false;
! 250: NGIRCd_SignalQuit = false;
! 251:
! 252: Log_Init(!NGIRCd_NoDaemon);
! 253: Random_Init();
! 254: Conf_Init();
! 255: Log_ReInit();
! 256:
! 257: /* Initialize the "main program":
! 258: * chroot environment, user and group ID, ... */
! 259: if (!NGIRCd_Init(NGIRCd_NoDaemon)) {
! 260: Log(LOG_ALERT, "Fatal: Initialization failed, exiting!");
! 261: exit(1);
! 262: }
! 263:
! 264: if (!io_library_init(CONNECTION_POOL)) {
! 265: Log(LOG_ALERT,
! 266: "Fatal: Could not initialize IO routines: %s",
! 267: strerror(errno));
! 268: exit(1);
! 269: }
! 270:
! 271: if (!Signals_Init()) {
! 272: Log(LOG_ALERT,
! 273: "Fatal: Could not set up signal handlers: %s",
! 274: strerror(errno));
! 275: exit(1);
! 276: }
! 277:
! 278: Channel_Init();
! 279: Conn_Init();
! 280: Class_Init();
! 281: Client_Init();
! 282:
! 283: /* Create protocol and server identification. The syntax
! 284: * used by ngIRCd in PASS commands and the known "extended
! 285: * flags" are described in doc/Protocol.txt. */
! 286: #ifdef IRCPLUS
! 287: snprintf(NGIRCd_ProtoID, sizeof NGIRCd_ProtoID, "%s%s %s|%s:%s",
! 288: PROTOVER, PROTOIRCPLUS, PACKAGE_NAME, PACKAGE_VERSION,
! 289: IRCPLUSFLAGS);
! 290: #ifdef ZLIB
! 291: strlcat(NGIRCd_ProtoID, "Z", sizeof NGIRCd_ProtoID);
! 292: #endif
! 293: if (Conf_OperCanMode)
! 294: strlcat(NGIRCd_ProtoID, "o", sizeof NGIRCd_ProtoID);
! 295: #else /* IRCPLUS */
! 296: snprintf(NGIRCd_ProtoID, sizeof NGIRCd_ProtoID, "%s%s %s|%s",
! 297: PROTOVER, PROTOIRC, PACKAGE_NAME, PACKAGE_VERSION);
! 298: #endif /* IRCPLUS */
! 299: strlcat(NGIRCd_ProtoID, " P", sizeof NGIRCd_ProtoID);
! 300: #ifdef ZLIB
! 301: strlcat(NGIRCd_ProtoID, "Z", sizeof NGIRCd_ProtoID);
! 302: #endif
! 303: LogDebug("Protocol and server ID is \"%s\".", NGIRCd_ProtoID);
! 304:
! 305: Channel_InitPredefined();
! 306:
! 307: if (Conn_InitListeners() < 1) {
! 308: Log(LOG_ALERT,
! 309: "Server isn't listening on a single port!" );
! 310: Log(LOG_ALERT,
! 311: "%s exiting due to fatal errors!", PACKAGE_NAME);
! 312: Pidfile_Delete();
! 313: exit(1);
! 314: }
! 315:
! 316: /* Main Run Loop */
! 317: Conn_Handler();
! 318:
! 319: Conn_Exit();
! 320: Client_Exit();
! 321: Channel_Exit();
! 322: Class_Exit();
! 323: Log_Exit();
! 324: Signals_Exit();
! 325: }
! 326: Pidfile_Delete();
! 327:
! 328: return 0;
! 329: } /* main */
! 330:
! 331:
! 332: /**
! 333: * Generate ngIRCd "version strings".
! 334: *
! 335: * The ngIRCd version information is generated once and then stored in the
! 336: * NGIRCd_Version and NGIRCd_VersionAddition string variables for further
! 337: * usage, for example by the IRC command "VERSION" and the --version command
! 338: * line switch.
! 339: */
! 340: static void
! 341: Fill_Version(void)
! 342: {
! 343: NGIRCd_VersionAddition[0] = '\0';
! 344:
! 345: #ifdef ICONV
! 346: if (NGIRCd_VersionAddition[0])
! 347: strlcat(NGIRCd_VersionAddition, "+",
! 348: sizeof NGIRCd_VersionAddition);
! 349: strlcat(NGIRCd_VersionAddition, "CHARCONV",
! 350: sizeof NGIRCd_VersionAddition);
! 351: #endif
! 352: #ifdef DEBUG
! 353: if (NGIRCd_VersionAddition[0])
! 354: strlcat(NGIRCd_VersionAddition, "+",
! 355: sizeof NGIRCd_VersionAddition);
! 356: strlcat(NGIRCd_VersionAddition, "DEBUG",
! 357: sizeof NGIRCd_VersionAddition);
! 358: #endif
! 359: #ifdef IDENTAUTH
! 360: if (NGIRCd_VersionAddition[0])
! 361: strlcat(NGIRCd_VersionAddition, "+",
! 362: sizeof NGIRCd_VersionAddition);
! 363: strlcat(NGIRCd_VersionAddition, "IDENT",
! 364: sizeof NGIRCd_VersionAddition);
! 365: #endif
! 366: #ifdef WANT_IPV6
! 367: if (NGIRCd_VersionAddition[0])
! 368: strlcat(NGIRCd_VersionAddition, "+",
! 369: sizeof(NGIRCd_VersionAddition));
! 370: strlcat(NGIRCd_VersionAddition, "IPv6",
! 371: sizeof(NGIRCd_VersionAddition));
! 372: #endif
! 373: #ifdef IRCPLUS
! 374: if (NGIRCd_VersionAddition[0])
! 375: strlcat(NGIRCd_VersionAddition, "+",
! 376: sizeof NGIRCd_VersionAddition);
! 377: strlcat(NGIRCd_VersionAddition, "IRCPLUS",
! 378: sizeof NGIRCd_VersionAddition);
! 379: #endif
! 380: #ifdef PAM
! 381: if (NGIRCd_VersionAddition[0])
! 382: strlcat(NGIRCd_VersionAddition, "+",
! 383: sizeof NGIRCd_VersionAddition);
! 384: strlcat(NGIRCd_VersionAddition, "PAM",
! 385: sizeof NGIRCd_VersionAddition);
! 386: #endif
! 387: #ifdef STRICT_RFC
! 388: if (NGIRCd_VersionAddition[0])
! 389: strlcat(NGIRCd_VersionAddition, "+",
! 390: sizeof NGIRCd_VersionAddition);
! 391: strlcat(NGIRCd_VersionAddition, "RFC",
! 392: sizeof NGIRCd_VersionAddition);
! 393: #endif
! 394: #ifdef SNIFFER
! 395: if (NGIRCd_VersionAddition[0])
! 396: strlcat(NGIRCd_VersionAddition, "+",
! 397: sizeof NGIRCd_VersionAddition);
! 398: strlcat(NGIRCd_VersionAddition, "SNIFFER",
! 399: sizeof NGIRCd_VersionAddition);
! 400: #endif
! 401: #ifdef SSL_SUPPORT
! 402: if (NGIRCd_VersionAddition[0])
! 403: strlcat(NGIRCd_VersionAddition, "+",
! 404: sizeof NGIRCd_VersionAddition);
! 405: strlcat(NGIRCd_VersionAddition, "SSL",
! 406: sizeof NGIRCd_VersionAddition);
! 407: #endif
! 408: #ifdef SYSLOG
! 409: if (NGIRCd_VersionAddition[0])
! 410: strlcat(NGIRCd_VersionAddition, "+",
! 411: sizeof NGIRCd_VersionAddition);
! 412: strlcat(NGIRCd_VersionAddition, "SYSLOG",
! 413: sizeof NGIRCd_VersionAddition);
! 414: #endif
! 415: #ifdef TCPWRAP
! 416: if (NGIRCd_VersionAddition[0])
! 417: strlcat(NGIRCd_VersionAddition, "+",
! 418: sizeof NGIRCd_VersionAddition);
! 419: strlcat(NGIRCd_VersionAddition, "TCPWRAP",
! 420: sizeof NGIRCd_VersionAddition);
! 421: #endif
! 422: #ifdef ZLIB
! 423: if (NGIRCd_VersionAddition[0])
! 424: strlcat(NGIRCd_VersionAddition, "+",
! 425: sizeof NGIRCd_VersionAddition);
! 426: strlcat(NGIRCd_VersionAddition, "ZLIB",
! 427: sizeof NGIRCd_VersionAddition);
! 428: #endif
! 429: if (NGIRCd_VersionAddition[0])
! 430: strlcat(NGIRCd_VersionAddition, "-",
! 431: sizeof(NGIRCd_VersionAddition));
! 432:
! 433: strlcat(NGIRCd_VersionAddition, HOST_CPU,
! 434: sizeof(NGIRCd_VersionAddition));
! 435: strlcat(NGIRCd_VersionAddition, "/", sizeof(NGIRCd_VersionAddition));
! 436: strlcat(NGIRCd_VersionAddition, HOST_VENDOR,
! 437: sizeof(NGIRCd_VersionAddition));
! 438: strlcat(NGIRCd_VersionAddition, "/", sizeof(NGIRCd_VersionAddition));
! 439: strlcat(NGIRCd_VersionAddition, HOST_OS,
! 440: sizeof(NGIRCd_VersionAddition));
! 441:
! 442: snprintf(NGIRCd_Version, sizeof NGIRCd_Version, "%s %s-%s",
! 443: PACKAGE_NAME, PACKAGE_VERSION, NGIRCd_VersionAddition);
! 444: } /* Fill_Version */
! 445:
! 446:
! 447: /**
! 448: * Display copyright and version information of ngIRCd on the console.
! 449: */
! 450: static void
! 451: Show_Version( void )
! 452: {
! 453: puts( NGIRCd_Version );
! 454: puts( "Copyright (c)2001-2021 Alexander Barton (<alex@barton.de>) and Contributors." );
! 455: puts( "Homepage: <http://ngircd.barton.de/>\n" );
! 456: puts( "This is free software; see the source for copying conditions. There is NO" );
! 457: puts( "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE." );
! 458: } /* Show_Version */
! 459:
! 460:
! 461: /**
! 462: * Display a short help text on the console.
! 463: * This help depends on the configuration of the executable and only shows
! 464: * options that are actually enabled.
! 465: */
! 466: static void
! 467: Show_Help( void )
! 468: {
! 469: #ifdef DEBUG
! 470: puts( " -d, --debug log extra debug messages" );
! 471: #endif
! 472: puts( " -f, --config <f> use file <f> as configuration file" );
! 473: puts( " -n, --nodaemon don't fork and don't detach from controlling terminal" );
! 474: puts( " -p, --passive disable automatic connections to other servers" );
! 475: #ifdef SNIFFER
! 476: puts( " -s, --sniffer enable network sniffer and display all IRC traffic" );
! 477: #endif
! 478: puts( " -t, --configtest read, validate and display configuration; then exit" );
! 479: puts( " -V, --version output version information and exit" );
! 480: puts( " -h, --help display this help and exit" );
! 481: } /* Show_Help */
! 482:
! 483:
! 484: /**
! 485: * Delete the file containing the process ID (PID).
! 486: */
! 487: static void
! 488: Pidfile_Delete( void )
! 489: {
! 490: /* Pidfile configured? */
! 491: if( ! Conf_PidFile[0] ) return;
! 492:
! 493: #ifdef DEBUG
! 494: Log( LOG_DEBUG, "Removing PID file (%s) ...", Conf_PidFile );
! 495: #endif
! 496:
! 497: if( unlink( Conf_PidFile ))
! 498: Log( LOG_ERR, "Error unlinking PID file (%s): %s", Conf_PidFile, strerror( errno ));
! 499: } /* Pidfile_Delete */
! 500:
! 501:
! 502: /**
! 503: * Create the file containing the process ID of ngIRCd ("PID file").
! 504: *
! 505: * @param pid The process ID to be stored in this file.
! 506: */
! 507: static void
! 508: Pidfile_Create(pid_t pid)
! 509: {
! 510: int pidfd;
! 511: char pidbuf[64];
! 512: int len;
! 513:
! 514: /* Pidfile configured? */
! 515: if( ! Conf_PidFile[0] ) return;
! 516:
! 517: #ifdef DEBUG
! 518: Log( LOG_DEBUG, "Creating PID file (%s) ...", Conf_PidFile );
! 519: #endif
! 520:
! 521: pidfd = open( Conf_PidFile, O_RDWR|O_CREAT|O_EXCL, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
! 522: if ( pidfd < 0 ) {
! 523: Log( LOG_ERR, "Error writing PID file (%s): %s", Conf_PidFile, strerror( errno ));
! 524: return;
! 525: }
! 526:
! 527: len = snprintf(pidbuf, sizeof pidbuf, "%ld\n", (long)pid);
! 528: if (len < 0 || len >= (int)sizeof pidbuf) {
! 529: Log(LOG_ERR, "Error converting process ID!");
! 530: close(pidfd);
! 531: return;
! 532: }
! 533:
! 534: if (write(pidfd, pidbuf, (size_t)len) != (ssize_t)len)
! 535: Log(LOG_ERR, "Can't write PID file (%s): %s!", Conf_PidFile,
! 536: strerror(errno));
! 537:
! 538: if (close(pidfd) != 0)
! 539: Log(LOG_ERR, "Error closing PID file (%s): %s!", Conf_PidFile,
! 540: strerror(errno));
! 541: } /* Pidfile_Create */
! 542:
! 543:
! 544: /**
! 545: * Redirect stdin, stdout and stderr to appropriate file handles.
! 546: *
! 547: * @param fd The file handle stdin, stdout and stderr should be redirected to.
! 548: */
! 549: static void
! 550: Setup_FDStreams(int fd)
! 551: {
! 552: if (fd < 0)
! 553: return;
! 554:
! 555: fflush(stdout);
! 556: fflush(stderr);
! 557:
! 558: /* Create new stdin(0), stdout(1) and stderr(2) descriptors */
! 559: dup2( fd, 0 ); dup2( fd, 1 ); dup2( fd, 2 );
! 560: } /* Setup_FDStreams */
! 561:
! 562:
! 563: #if !defined(SINGLE_USER_OS)
! 564:
! 565: /**
! 566: * Get user and group ID of unprivileged "nobody" user.
! 567: *
! 568: * @param uid User ID
! 569: * @param gid Group ID
! 570: * @return true on success.
! 571: */
! 572: static bool
! 573: NGIRCd_getNobodyID(uid_t *uid, gid_t *gid )
! 574: {
! 575: struct passwd *pwd;
! 576:
! 577: #ifdef __CYGWIN__
! 578: /* Cygwin kludge.
! 579: * It can return EINVAL instead of EPERM
! 580: * so, if we are already unprivileged,
! 581: * use id of current user.
! 582: */
! 583: if (geteuid() && getuid()) {
! 584: *uid = getuid();
! 585: *gid = getgid();
! 586: return true;
! 587: }
! 588: #endif
! 589:
! 590: pwd = getpwnam("nobody");
! 591: if (!pwd)
! 592: return false;
! 593:
! 594: if (!pwd->pw_uid || !pwd->pw_gid)
! 595: return false;
! 596:
! 597: *uid = pwd->pw_uid;
! 598: *gid = pwd->pw_gid;
! 599: endpwent();
! 600:
! 601: return true;
! 602: } /* NGIRCd_getNobodyID */
! 603:
! 604: #endif
! 605:
! 606:
! 607: #ifdef HAVE_ARC4RANDOM
! 608: static void
! 609: Random_Init(void)
! 610: {
! 611:
! 612: }
! 613: #else
! 614: static bool
! 615: Random_Init_Kern(const char *file)
! 616: {
! 617: unsigned int seed;
! 618: bool ret = false;
! 619: int fd = open(file, O_RDONLY);
! 620: if (fd >= 0) {
! 621: if (read(fd, &seed, sizeof(seed)) == sizeof(seed))
! 622: ret = true;
! 623: close(fd);
! 624: srand(seed);
! 625: }
! 626: return ret;
! 627: }
! 628:
! 629: /**
! 630: * Initialize libc rand(3) number generator
! 631: */
! 632: static void
! 633: Random_Init(void)
! 634: {
! 635: if (Random_Init_Kern("/dev/urandom"))
! 636: return;
! 637: if (Random_Init_Kern("/dev/random"))
! 638: return;
! 639: if (Random_Init_Kern("/dev/arandom"))
! 640: return;
! 641: srand(rand() ^ (unsigned)getpid() ^ (unsigned)time(NULL));
! 642: }
! 643: #endif
! 644:
! 645:
! 646: /**
! 647: * Initialize ngIRCd daemon.
! 648: *
! 649: * @param NGIRCd_NoDaemon Set to true if ngIRCd should run in the
! 650: * foreground (and not as a daemon).
! 651: * @return true on success.
! 652: */
! 653: static bool
! 654: NGIRCd_Init(bool NGIRCd_NoDaemon)
! 655: {
! 656: static bool initialized;
! 657: bool chrooted = false;
! 658: struct passwd *pwd;
! 659: struct group *grp;
! 660: int real_errno, fd = -1;
! 661: pid_t pid;
! 662:
! 663: if (initialized)
! 664: return true;
! 665:
! 666: if (!NGIRCd_NoDaemon) {
! 667: /* open /dev/null before chroot() */
! 668: fd = open( "/dev/null", O_RDWR);
! 669: if (fd < 0)
! 670: Log(LOG_WARNING, "Could not open /dev/null: %s",
! 671: strerror(errno));
! 672: }
! 673:
! 674: /* SSL initialization */
! 675: if (!ConnSSL_InitLibrary()) {
! 676: Log(LOG_ERR, "Error during SSL initialization!");
! 677: goto out;
! 678: }
! 679:
! 680: /* Change root */
! 681: if (Conf_Chroot[0]) {
! 682: if (chdir(Conf_Chroot) != 0) {
! 683: Log(LOG_ERR, "Can't chdir() in ChrootDir (%s): %s!",
! 684: Conf_Chroot, strerror(errno));
! 685: goto out;
! 686: }
! 687:
! 688: if (chroot(Conf_Chroot) != 0) {
! 689: Log(LOG_ERR,
! 690: "Can't change root directory to \"%s\": %s!",
! 691: Conf_Chroot, strerror(errno));
! 692: goto out;
! 693: } else {
! 694: chrooted = true;
! 695: Log(LOG_INFO,
! 696: "Changed root and working directory to \"%s\".",
! 697: Conf_Chroot);
! 698: }
! 699: }
! 700:
! 701: #if !defined(SINGLE_USER_OS)
! 702: /* Check user ID */
! 703: if (Conf_UID == 0) {
! 704: pwd = getpwuid(0);
! 705: Log(LOG_INFO,
! 706: "ServerUID must not be %s(0), using \"nobody\" instead.",
! 707: pwd ? pwd->pw_name : "?");
! 708: if (!NGIRCd_getNobodyID(&Conf_UID, &Conf_GID)) {
! 709: Log(LOG_WARNING,
! 710: "Could not get user/group ID of user \"nobody\": %s",
! 711: errno ? strerror(errno) : "not found" );
! 712: goto out;
! 713: }
! 714: }
! 715:
! 716: /* Change group ID */
! 717: if (getgid() != Conf_GID) {
! 718: if (setgid(Conf_GID) != 0) {
! 719: real_errno = errno;
! 720: grp = getgrgid(Conf_GID);
! 721: Log(LOG_ERR, "Can't change group ID to %s(%u): %s!",
! 722: grp ? grp->gr_name : "?", Conf_GID,
! 723: strerror(real_errno));
! 724: if (real_errno != EPERM)
! 725: goto out;
! 726: }
! 727: #ifdef HAVE_SETGROUPS
! 728: if (setgroups(0, NULL) != 0) {
! 729: real_errno = errno;
! 730: Log(LOG_ERR, "Can't drop supplementary group IDs: %s!",
! 731: strerror(errno));
! 732: if (real_errno != EPERM)
! 733: goto out;
! 734: }
! 735: #else
! 736: Log(LOG_WARNING,
! 737: "Can't drop supplementary group IDs: setgroups(3) missing!");
! 738: #endif
! 739: }
! 740: #endif
! 741:
! 742: /* Change user ID */
! 743: if (getuid() != Conf_UID) {
! 744: if (setuid(Conf_UID) != 0) {
! 745: real_errno = errno;
! 746: pwd = getpwuid(Conf_UID);
! 747: Log(LOG_ERR, "Can't change user ID to %s(%u): %s!",
! 748: pwd ? pwd->pw_name : "?", Conf_UID,
! 749: strerror(real_errno));
! 750: if (real_errno != EPERM)
! 751: goto out;
! 752: }
! 753: }
! 754:
! 755: initialized = true;
! 756:
! 757: /* Normally a child process is forked which isn't any longer
! 758: * connected to ther controlling terminal. Use "--nodaemon"
! 759: * to disable this "daemon mode" (useful for debugging). */
! 760: if (!NGIRCd_NoDaemon) {
! 761: pid = fork();
! 762: if (pid > 0) {
! 763: /* "Old" process: exit. */
! 764: exit(0);
! 765: }
! 766: if (pid < 0) {
! 767: /* Error!? */
! 768: fprintf(stderr,
! 769: "%s: Can't fork: %s!\nFatal error, exiting now ...\n",
! 770: PACKAGE_NAME, strerror(errno));
! 771: exit(1);
! 772: }
! 773:
! 774: /* New child process */
! 775: #ifdef HAVE_SETSID
! 776: (void)setsid();
! 777: #else
! 778: setpgrp(0, getpid());
! 779: #endif
! 780: if (chdir("/") != 0)
! 781: Log(LOG_ERR, "Can't change directory to '/': %s!",
! 782: strerror(errno));
! 783:
! 784: /* Detach stdin, stdout and stderr */
! 785: Setup_FDStreams(fd);
! 786: if (fd > 2)
! 787: close(fd);
! 788: }
! 789: pid = getpid();
! 790:
! 791: Pidfile_Create(pid);
! 792:
! 793: /* Check UID/GID we are running as, can be different from values
! 794: * configured (e. g. if we were already started with a UID>0. */
! 795: Conf_UID = getuid();
! 796: Conf_GID = getgid();
! 797:
! 798: pwd = getpwuid(Conf_UID);
! 799: grp = getgrgid(Conf_GID);
! 800:
! 801: Log(LOG_INFO, "Running as user %s(%ld), group %s(%ld), with PID %ld.",
! 802: pwd ? pwd->pw_name : "unknown", (long)Conf_UID,
! 803: grp ? grp->gr_name : "unknown", (long)Conf_GID, (long)pid);
! 804:
! 805: if (chrooted) {
! 806: Log(LOG_INFO, "Running with root directory \"%s\".",
! 807: Conf_Chroot );
! 808: return true;
! 809: } else
! 810: Log(LOG_INFO, "Not running with changed root directory.");
! 811:
! 812: /* Change working directory to home directory of the user we are
! 813: * running as (only when running in daemon mode and not in chroot) */
! 814:
! 815: if (NGIRCd_NoDaemon)
! 816: return true;
! 817:
! 818: if (pwd) {
! 819: if (chdir(pwd->pw_dir) == 0)
! 820: Log(LOG_DEBUG,
! 821: "Changed working directory to \"%s\" ...",
! 822: pwd->pw_dir);
! 823: else
! 824: Log(LOG_ERR,
! 825: "Can't change working directory to \"%s\": %s!",
! 826: pwd->pw_dir, strerror(errno));
! 827: } else
! 828: Log(LOG_ERR, "Can't get user informaton for UID %d!?", Conf_UID);
! 829:
! 830: return true;
! 831: out:
! 832: if (fd > 2)
! 833: close(fd);
! 834: return false;
! 835: } /* NGIRCd_Init */
! 836:
! 837:
! 838: /* -eof- */