Add "FNC" (forced nick changes) to ISUPPORT(005) numeric
[ngircd-alex.git] / src / ngircd / ngircd.c
index e24cefa86d63402c61dc6d81c7adba8e4c4e0d7d..7166640ba054288c08030f331ddf9c9724e0a073 100644 (file)
@@ -1,6 +1,6 @@
 /*
  * ngIRCd -- The Next Generation IRC Daemon
- * Copyright (c)2001-2012 Alexander Barton (alex@barton.de) and Contributors.
+ * Copyright (c)2001-2020 Alexander Barton (alex@barton.de) and Contributors.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * by the loader of the operating system.
  */
 
-#include "imp.h"
 #include <assert.h>
 #include <errno.h>
 #include <stdio.h>
 #include <stdlib.h>
-#include <signal.h>
 #include <string.h>
 #include <unistd.h>
 #include <time.h>
 #include <mcheck.h>
 #endif
 
-#include "defines.h"
 #include "conn.h"
 #include "class.h"
-#include "conf-ssl.h"
 #include "channel.h"
 #include "conf.h"
-#include "lists.h"
 #include "log.h"
-#include "parse.h"
 #include "sighandlers.h"
 #include "io.h"
-#include "irc.h"
 
-#include "exp.h"
 #include "ngircd.h"
 
-
 static void Show_Version PARAMS(( void ));
 static void Show_Help PARAMS(( void ));
 
@@ -134,7 +125,7 @@ main(int argc, const char *argv[])
                        if (strcmp(argv[i], "--help") == 0) {
                                Show_Version();
                                puts(""); Show_Help( ); puts( "" );
-                               exit(1);
+                               exit(0);
                        }
                        if (strcmp(argv[i], "--nodaemon") == 0) {
                                NGIRCd_NoDaemon = true;
@@ -152,7 +143,7 @@ main(int argc, const char *argv[])
 #endif
                        if (strcmp(argv[i], "--version") == 0) {
                                Show_Version();
-                               exit(1);
+                               exit(0);
                        }
                }
                else if(argv[i][0] == '-' && argv[i][1] != '-') {
@@ -209,21 +200,23 @@ main(int argc, const char *argv[])
                                }
 
                                if (!ok) {
-                                       printf("%s: invalid option \"-%c\"!\n",
-                                              PACKAGE_NAME, argv[i][n]);
-                                       printf("Try \"%s --help\" for more information.\n",
-                                              PACKAGE_NAME);
-                                       exit(1);
+                                       fprintf(stderr,
+                                               "%s: invalid option \"-%c\"!\n",
+                                               PACKAGE_NAME, argv[i][n]);
+                                       fprintf(stderr,
+                                               "Try \"%s --help\" for more information.\n",
+                                               PACKAGE_NAME);
+                                       exit(2);
                                }
                        }
 
                }
                if (!ok) {
-                       printf("%s: invalid option \"%s\"!\n",
-                              PACKAGE_NAME, argv[i]);
-                       printf("Try \"%s --help\" for more information.\n",
-                              PACKAGE_NAME);
-                       exit(1);
+                       fprintf(stderr, "%s: invalid option \"%s\"!\n",
+                               PACKAGE_NAME, argv[i]);
+                       fprintf(stderr, "Try \"%s --help\" for more information.\n",
+                               PACKAGE_NAME);
+                       exit(2);
                }
        }
 
@@ -255,26 +248,18 @@ main(int argc, const char *argv[])
                NGIRCd_SignalRestart = false;
                NGIRCd_SignalQuit = false;
 
-               /* Initialize modules, part I */
                Log_Init(!NGIRCd_NoDaemon);
                Random_Init();
                Conf_Init();
                Log_ReInit();
 
-               /* Initialize the "main program": chroot environment, user and
-                * group ID, ... */
+               /* Initialize the "main program":
+                * chroot environment, user and group ID, ... */
                if (!NGIRCd_Init(NGIRCd_NoDaemon)) {
-                       Log(LOG_ALERT, "Fatal: Initialization failed");
+                       Log(LOG_ALERT, "Fatal: Initialization failed, exiting!");
                        exit(1);
                }
 
-               /* Initialize modules, part II: these functions are eventually
-                * called with already dropped privileges ... */
-               Channel_Init();
-               Client_Init();
-               Conn_Init();
-               Class_Init();
-
                if (!io_library_init(CONNECTION_POOL)) {
                        Log(LOG_ALERT,
                            "Fatal: Could not initialize IO routines: %s",
@@ -289,6 +274,11 @@ main(int argc, const char *argv[])
                        exit(1);
                }
 
+               Channel_Init();
+               Conn_Init();
+               Class_Init();
+               Client_Init();
+
                /* Create protocol and server identification. The syntax
                 * used by ngIRCd in PASS commands and the known "extended
                 * flags" are described in doc/Protocol.txt. */
@@ -297,10 +287,10 @@ main(int argc, const char *argv[])
                         PROTOVER, PROTOIRCPLUS, PACKAGE_NAME, PACKAGE_VERSION,
                         IRCPLUSFLAGS);
 #ifdef ZLIB
-               strcat(NGIRCd_ProtoID, "Z");
+               strlcat(NGIRCd_ProtoID, "Z", sizeof NGIRCd_ProtoID);
 #endif
                if (Conf_OperCanMode)
-                       strcat(NGIRCd_ProtoID, "o");
+                       strlcat(NGIRCd_ProtoID, "o", sizeof NGIRCd_ProtoID);
 #else /* IRCPLUS */
                snprintf(NGIRCd_ProtoID, sizeof NGIRCd_ProtoID, "%s%s %s|%s",
                         PROTOVER, PROTOIRC, PACKAGE_NAME, PACKAGE_VERSION);
@@ -347,70 +337,106 @@ main(int argc, const char *argv[])
  * line switch.
  */
 static void
-Fill_Version( void )
+Fill_Version(void)
 {
        NGIRCd_VersionAddition[0] = '\0';
 
-#ifdef SYSLOG
-       strlcpy( NGIRCd_VersionAddition, "SYSLOG", sizeof NGIRCd_VersionAddition );
+#ifdef ICONV
+       if (NGIRCd_VersionAddition[0])
+               strlcat(NGIRCd_VersionAddition, "+",
+                       sizeof NGIRCd_VersionAddition);
+       strlcat(NGIRCd_VersionAddition, "CHARCONV",
+               sizeof NGIRCd_VersionAddition);
 #endif
-#ifdef ZLIB
-       if( NGIRCd_VersionAddition[0] )
-               strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition );
-       strlcat( NGIRCd_VersionAddition, "ZLIB", sizeof NGIRCd_VersionAddition );
+#ifdef DEBUG
+       if (NGIRCd_VersionAddition[0])
+               strlcat(NGIRCd_VersionAddition, "+",
+                       sizeof NGIRCd_VersionAddition);
+       strlcat(NGIRCd_VersionAddition, "DEBUG",
+               sizeof NGIRCd_VersionAddition);
 #endif
-#ifdef SSL_SUPPORT
-       if ( NGIRCd_VersionAddition[0] ) strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition );
-       strlcat( NGIRCd_VersionAddition, "SSL", sizeof NGIRCd_VersionAddition );
+#ifdef IDENTAUTH
+       if (NGIRCd_VersionAddition[0])
+               strlcat(NGIRCd_VersionAddition, "+",
+                       sizeof NGIRCd_VersionAddition);
+       strlcat(NGIRCd_VersionAddition, "IDENT",
+               sizeof NGIRCd_VersionAddition);
 #endif
-#ifdef TCPWRAP
-       if( NGIRCd_VersionAddition[0] )
-                       strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition );
-       strlcat( NGIRCd_VersionAddition, "TCPWRAP", sizeof NGIRCd_VersionAddition );
+#ifdef WANT_IPV6
+       if (NGIRCd_VersionAddition[0])
+               strlcat(NGIRCd_VersionAddition, "+",
+                       sizeof(NGIRCd_VersionAddition));
+       strlcat(NGIRCd_VersionAddition, "IPv6",
+               sizeof(NGIRCd_VersionAddition));
 #endif
-#ifdef IDENTAUTH
-       if( NGIRCd_VersionAddition[0] )
-               strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition );
-       strlcat( NGIRCd_VersionAddition, "IDENT", sizeof NGIRCd_VersionAddition );
+#ifdef IRCPLUS
+       if (NGIRCd_VersionAddition[0])
+               strlcat(NGIRCd_VersionAddition, "+",
+                       sizeof NGIRCd_VersionAddition);
+       strlcat(NGIRCd_VersionAddition, "IRCPLUS",
+               sizeof NGIRCd_VersionAddition);
 #endif
 #ifdef PAM
        if (NGIRCd_VersionAddition[0])
-               strlcat(NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition);
-       strlcat(NGIRCd_VersionAddition, "PAM", sizeof NGIRCd_VersionAddition);
+               strlcat(NGIRCd_VersionAddition, "+",
+                       sizeof NGIRCd_VersionAddition);
+       strlcat(NGIRCd_VersionAddition, "PAM",
+               sizeof NGIRCd_VersionAddition);
 #endif
-#ifdef DEBUG
-       if( NGIRCd_VersionAddition[0] )
-               strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition );
-       strlcat( NGIRCd_VersionAddition, "DEBUG", sizeof NGIRCd_VersionAddition );
+#ifdef STRICT_RFC
+       if (NGIRCd_VersionAddition[0])
+               strlcat(NGIRCd_VersionAddition, "+",
+                       sizeof NGIRCd_VersionAddition);
+       strlcat(NGIRCd_VersionAddition, "RFC",
+               sizeof NGIRCd_VersionAddition);
 #endif
 #ifdef SNIFFER
-       if( NGIRCd_VersionAddition[0] )
-               strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition );
-       strlcat( NGIRCd_VersionAddition, "SNIFFER", sizeof NGIRCd_VersionAddition );
+       if (NGIRCd_VersionAddition[0])
+               strlcat(NGIRCd_VersionAddition, "+",
+                       sizeof NGIRCd_VersionAddition);
+       strlcat(NGIRCd_VersionAddition, "SNIFFER",
+               sizeof NGIRCd_VersionAddition);
 #endif
-#ifdef STRICT_RFC
-       if( NGIRCd_VersionAddition[0] )
-               strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition );
-       strlcat( NGIRCd_VersionAddition, "RFC", sizeof NGIRCd_VersionAddition );
+#ifdef SSL_SUPPORT
+       if (NGIRCd_VersionAddition[0])
+               strlcat(NGIRCd_VersionAddition, "+",
+                       sizeof NGIRCd_VersionAddition);
+       strlcat(NGIRCd_VersionAddition, "SSL",
+               sizeof NGIRCd_VersionAddition);
 #endif
-#ifdef IRCPLUS
-       if( NGIRCd_VersionAddition[0] )
-               strlcat( NGIRCd_VersionAddition, "+", sizeof NGIRCd_VersionAddition );
-       strlcat( NGIRCd_VersionAddition, "IRCPLUS", sizeof NGIRCd_VersionAddition );
+#ifdef SYSLOG
+       if (NGIRCd_VersionAddition[0])
+               strlcat(NGIRCd_VersionAddition, "+",
+                       sizeof NGIRCd_VersionAddition);
+       strlcat(NGIRCd_VersionAddition, "SYSLOG",
+               sizeof NGIRCd_VersionAddition);
 #endif
-#ifdef WANT_IPV6
+#ifdef TCPWRAP
        if (NGIRCd_VersionAddition[0])
-               strlcat(NGIRCd_VersionAddition, "+", sizeof(NGIRCd_VersionAddition));
-       strlcat(NGIRCd_VersionAddition, "IPv6", sizeof(NGIRCd_VersionAddition));
+               strlcat(NGIRCd_VersionAddition, "+",
+                       sizeof NGIRCd_VersionAddition);
+       strlcat(NGIRCd_VersionAddition, "TCPWRAP",
+               sizeof NGIRCd_VersionAddition);
 #endif
-       if( NGIRCd_VersionAddition[0] )
-               strlcat( NGIRCd_VersionAddition, "-", sizeof( NGIRCd_VersionAddition ));
-
-       strlcat( NGIRCd_VersionAddition, TARGET_CPU, sizeof( NGIRCd_VersionAddition ));
-       strlcat( NGIRCd_VersionAddition, "/", sizeof( NGIRCd_VersionAddition ));
-       strlcat( NGIRCd_VersionAddition, TARGET_VENDOR, sizeof( NGIRCd_VersionAddition ));
-       strlcat( NGIRCd_VersionAddition, "/", sizeof( NGIRCd_VersionAddition ));
-       strlcat( NGIRCd_VersionAddition, TARGET_OS, sizeof( NGIRCd_VersionAddition ));
+#ifdef ZLIB
+       if (NGIRCd_VersionAddition[0])
+               strlcat(NGIRCd_VersionAddition, "+",
+                       sizeof NGIRCd_VersionAddition);
+       strlcat(NGIRCd_VersionAddition, "ZLIB",
+               sizeof NGIRCd_VersionAddition);
+#endif
+       if (NGIRCd_VersionAddition[0])
+               strlcat(NGIRCd_VersionAddition, "-",
+                       sizeof(NGIRCd_VersionAddition));
+
+       strlcat(NGIRCd_VersionAddition, HOST_CPU,
+               sizeof(NGIRCd_VersionAddition));
+       strlcat(NGIRCd_VersionAddition, "/", sizeof(NGIRCd_VersionAddition));
+       strlcat(NGIRCd_VersionAddition, HOST_VENDOR,
+               sizeof(NGIRCd_VersionAddition));
+       strlcat(NGIRCd_VersionAddition, "/", sizeof(NGIRCd_VersionAddition));
+       strlcat(NGIRCd_VersionAddition, HOST_OS,
+               sizeof(NGIRCd_VersionAddition));
 
        snprintf(NGIRCd_Version, sizeof NGIRCd_Version, "%s %s-%s",
                 PACKAGE_NAME, PACKAGE_VERSION, NGIRCd_VersionAddition);
@@ -424,7 +450,7 @@ static void
 Show_Version( void )
 {
        puts( NGIRCd_Version );
-       puts( "Copyright (c)2001-2012 Alexander Barton (<alex@barton.de>) and Contributors." );
+       puts( "Copyright (c)2001-2020 Alexander Barton (<alex@barton.de>) and Contributors." );
        puts( "Homepage: <http://ngircd.barton.de/>\n" );
        puts( "This is free software; see the source for copying conditions. There is NO" );
        puts( "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE." );
@@ -499,21 +525,23 @@ Pidfile_Create(pid_t pid)
 
        len = snprintf(pidbuf, sizeof pidbuf, "%ld\n", (long)pid);
        if (len < 0 || len >= (int)sizeof pidbuf) {
-               Log(LOG_ERR, "Error converting pid");
+               Log(LOG_ERR, "Error converting process ID!");
                close(pidfd);
                return;
        }
-       
+
        if (write(pidfd, pidbuf, (size_t)len) != (ssize_t)len)
-               Log( LOG_ERR, "Can't write PID file (%s): %s", Conf_PidFile, strerror( errno ));
+               Log(LOG_ERR, "Can't write PID file (%s): %s!", Conf_PidFile,
+                   strerror(errno));
 
-       if( close(pidfd) != 0 )
-               Log( LOG_ERR, "Error closing PID file (%s): %s", Conf_PidFile, strerror( errno ));
+       if (close(pidfd) != 0)
+               Log(LOG_ERR, "Error closing PID file (%s): %s!", Conf_PidFile,
+                   strerror(errno));
 } /* Pidfile_Create */
 
 
 /**
- * Redirect stdin, stdout and stderr to apropriate file handles.
+ * Redirect stdin, stdout and stderr to appropriate file handles.
  *
  * @param fd   The file handle stdin, stdout and stderr should be redirected to.
  */
@@ -531,6 +559,8 @@ Setup_FDStreams(int fd)
 } /* Setup_FDStreams */
 
 
+#if !defined(SINGLE_USER_OS)
+
 /**
  * Get user and group ID of unprivileged "nobody" user.
  *
@@ -570,7 +600,16 @@ NGIRCd_getNobodyID(uid_t *uid, gid_t *gid )
        return true;
 } /* NGIRCd_getNobodyID */
 
+#endif
 
+
+#ifdef HAVE_ARC4RANDOM
+static void
+Random_Init(void)
+{
+
+}
+#else
 static bool
 Random_Init_Kern(const char *file)
 {
@@ -600,6 +639,7 @@ Random_Init(void)
                return;
        srand(rand() ^ (unsigned)getpid() ^ (unsigned)time(NULL));
 }
+#endif
 
 
 /**
@@ -631,21 +671,22 @@ NGIRCd_Init(bool NGIRCd_NoDaemon)
        }
 
        /* SSL initialization */
-       if (!ConnSSL_InitLibrary())
-               Log(LOG_WARNING,
-                   "Warning: Error during SSL initialization, continuing ...");
+       if (!ConnSSL_InitLibrary()) {
+               Log(LOG_ERR, "Error during SSL initialization!");
+               goto out;
+       }
 
        /* Change root */
        if (Conf_Chroot[0]) {
                if (chdir(Conf_Chroot) != 0) {
-                       Log(LOG_ERR, "Can't chdir() in ChrootDir (%s): %s",
+                       Log(LOG_ERR, "Can't chdir() in ChrootDir (%s): %s!",
                            Conf_Chroot, strerror(errno));
                        goto out;
                }
 
                if (chroot(Conf_Chroot) != 0) {
                        Log(LOG_ERR,
-                           "Can't change root directory to \"%s\": %s",
+                           "Can't change root directory to \"%s\": %s!",
                            Conf_Chroot, strerror(errno));
                        goto out;
                } else {
@@ -656,6 +697,7 @@ NGIRCd_Init(bool NGIRCd_NoDaemon)
                }
        }
 
+#if !defined(SINGLE_USER_OS)
        /* Check user ID */
        if (Conf_UID == 0) {
                pwd = getpwuid(0);
@@ -675,22 +717,35 @@ NGIRCd_Init(bool NGIRCd_NoDaemon)
                if (setgid(Conf_GID) != 0) {
                        real_errno = errno;
                        grp = getgrgid(Conf_GID);
-                       Log(LOG_ERR, "Can't change group ID to %s(%u): %s",
+                       Log(LOG_ERR, "Can't change group ID to %s(%u): %s!",
                            grp ? grp->gr_name : "?", Conf_GID,
-                           strerror(errno));
-                       if (real_errno != EPERM) 
+                           strerror(real_errno));
+                       if (real_errno != EPERM)
                                goto out;
                }
+#ifdef HAVE_SETGROUPS
+               if (setgroups(0, NULL) != 0) {
+                       real_errno = errno;
+                       Log(LOG_ERR, "Can't drop supplementary group IDs: %s!",
+                                       strerror(errno));
+                       if (real_errno != EPERM)
+                               goto out;
+               }
+#else
+               Log(LOG_WARNING,
+                   "Can't drop supplementary group IDs: setgroups(3) missing!");
+#endif
        }
+#endif
 
        /* Change user ID */
        if (getuid() != Conf_UID) {
                if (setuid(Conf_UID) != 0) {
                        real_errno = errno;
                        pwd = getpwuid(Conf_UID);
-                       Log(LOG_ERR, "Can't change user ID to %s(%u): %s",
+                       Log(LOG_ERR, "Can't change user ID to %s(%u): %s!",
                            pwd ? pwd->pw_name : "?", Conf_UID,
-                           strerror(errno));
+                           strerror(real_errno));
                        if (real_errno != EPERM)
                                goto out;
                }
@@ -716,13 +771,13 @@ NGIRCd_Init(bool NGIRCd_NoDaemon)
                }
 
                /* New child process */
-#ifndef NeXT
+#ifdef HAVE_SETSID
                (void)setsid();
 #else
                setpgrp(0, getpid());
 #endif
                if (chdir("/") != 0)
-                       Log(LOG_ERR, "Can't change directory to '/': %s",
+                       Log(LOG_ERR, "Can't change directory to '/': %s!",
                                     strerror(errno));
 
                /* Detach stdin, stdout and stderr */
@@ -765,8 +820,8 @@ NGIRCd_Init(bool NGIRCd_NoDaemon)
                            "Changed working directory to \"%s\" ...",
                            pwd->pw_dir);
                else
-                       Log(LOG_INFO,
-                           "Notice: Can't change working directory to \"%s\": %s",
+                       Log(LOG_ERR,
+                           "Can't change working directory to \"%s\": %s!",
                            pwd->pw_dir, strerror(errno));
        } else
                Log(LOG_ERR, "Can't get user informaton for UID %d!?", Conf_UID);