annotate src/sm-archive.cpp @ 2:32b57406b656

initial version
author carl
date Fri, 10 Mar 2006 10:47:12 -0800
parents 616666e2f34c
children 01268466f0dc
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1 /*
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2
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3 Copyright (c) 2004, 2005 Carl Byington - 510 Software Group, released
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4 under the GPL version 2 or any later version at your choice available at
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5 http://www.fsf.org/licenses/gpl.txt
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6
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7 Based on a sample milter Copyright (c) 2000-2003 Sendmail, Inc. and its
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8 suppliers. Inspired by the DCC by Rhyolite Software
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9
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10 -p port The port through which the MTA will connect to this milter.
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11 -t sec The timeout value.
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12 -c Check the config, and print a copy to stdout. Don't start the
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13 milter or do anything with the socket.
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14 -d increase debug level
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15
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16 */
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17
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18
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19 // from sendmail sample
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20 #include <sys/types.h>
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21 #include <sys/stat.h>
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22 #include <errno.h>
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23 #include <sysexits.h>
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24 #include <unistd.h>
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25
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26 // needed for socket io
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27 #include <sys/ioctl.h>
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28 #include <net/if.h>
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29 #include <arpa/inet.h>
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30 #include <netinet/in.h>
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31 #include <netinet/tcp.h>
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32 #include <netdb.h>
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33 #include <sys/socket.h>
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34 #include <sys/un.h>
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35
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36 // needed for thread
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37 #include <pthread.h>
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38
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39 // needed for std c++ collections
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40 #include <set>
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41 #include <map>
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42 #include <list>
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43
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44 // for the dns resolver
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45 #include <netinet/in.h>
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46 #include <arpa/nameser.h>
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47 #include <resolv.h>
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48
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49 // misc stuff needed here
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50 #include <ctype.h>
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51 #include <syslog.h>
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52 #include <pwd.h>
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53 #include <sys/wait.h> /* header for waitpid() and various macros */
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54 #include <signal.h> /* header for signal functions */
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55
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56 #include "includes.h"
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57
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58 static char* smarchive_version="$Id$";
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59
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60
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61 extern "C" {
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62 #include "libmilter/mfapi.h"
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63 sfsistat mlfi_connect(SMFICTX *ctx, char *hostname, _SOCK_ADDR *hostaddr);
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64 sfsistat mlfi_envfrom(SMFICTX *ctx, char **argv);
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65 sfsistat mlfi_envrcpt(SMFICTX *ctx, char **argv);
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66 sfsistat mlfi_eom(SMFICTX *ctx);
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67 sfsistat mlfi_abort(SMFICTX *ctx);
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68 sfsistat mlfi_close(SMFICTX *ctx);
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69 void sig_chld(int signo);
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70 }
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71
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72 int debug_syslog = 0;
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73 bool syslog_opened = false;
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74 bool use_syslog = true; // false to printf
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75 bool loader_run = true; // used to stop the config loader thread
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76 CONFIG *config = NULL; // protected by the config_mutex
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77 int generation = 0; // protected by the config_mutex
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78 const int maxlen = 1000; // used for snprintf buffers
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79
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80 pthread_mutex_t config_mutex;
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81 pthread_mutex_t syslog_mutex;
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82
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83
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84 mlfiPriv::mlfiPriv() {
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85 pthread_mutex_lock(&config_mutex);
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86 pc = config;
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87 pc->reference_count++;
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88 pthread_mutex_unlock(&config_mutex);
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89 mailaddr = NULL;
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90 queueid = NULL;
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91 processed_from = false;
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92 }
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93
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94 mlfiPriv::~mlfiPriv() {
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95 pthread_mutex_lock(&config_mutex);
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96 pc->reference_count--;
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97 pthread_mutex_unlock(&config_mutex);
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98 reset(true);
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99 }
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100
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101 void mlfiPriv::reset(bool final) {
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102 processed_from = false;
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103 if (mailaddr) free(mailaddr);
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104 if (queueid) free(queueid);
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105 if (!final) {
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106 mailaddr = NULL;
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107 queueid = NULL;
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108 }
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109 }
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110
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111 #define MLFIPRIV ((struct mlfiPriv *) smfi_getpriv(ctx))
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112
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113
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114 ////////////////////////////////////////////////
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115 // syslog a message
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116 //
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117 void my_syslog(mlfiPriv *priv, char *text) {
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118 char buf[maxlen];
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119 if (priv) {
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120 snprintf(buf, sizeof(buf), "%s: %s", priv->queueid, text);
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121 text = buf;
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122 }
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123 if (use_syslog) {
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124 pthread_mutex_lock(&syslog_mutex);
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125 if (!syslog_opened) {
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126 openlog("sm-archive", LOG_PID, LOG_MAIL);
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127 syslog_opened = true;
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128 }
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129 syslog(LOG_NOTICE, "%s", text);
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130 pthread_mutex_unlock(&syslog_mutex);
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131 }
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132 else {
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133 printf("%s \n", text);
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134 }
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135 }
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136
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137 void my_syslog(char *text) {
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138 my_syslog(NULL, text);
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139 }
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140
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141
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142 ////////////////////////////////////////////////
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143 // this email address is passed in from sendmail, and will
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144 // always be enclosed in <>. It may have mixed case, just
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145 // as the mail client sent it. We dup the string and convert
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146 // the duplicate to lower case.
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147 //
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148 char *to_lower_string(char *email);
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149 char *to_lower_string(char *email) {
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150 int n = strlen(email)-2;
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151 if (n < 1) return strdup(email);
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152 char *key = strdup(email+1);
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153 key[n] = '\0';
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154 for (int i=0; i<n; i++) key[i] = tolower(key[i]);
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155 return key;
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156 }
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157
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158
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159 ////////////////////////////////////////////////
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160 // start of sendmail milter interfaces
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161 //
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162 sfsistat mlfi_connect(SMFICTX *ctx, char *hostname, _SOCK_ADDR *hostaddr)
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163 {
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164 // allocate some private memory
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165 mlfiPriv *priv = new mlfiPriv;
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166 // save the private data
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167 smfi_setpriv(ctx, (void*)priv);
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168 // continue processing
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169 return SMFIS_CONTINUE;
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170 }
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171
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172 sfsistat mlfi_envfrom(SMFICTX *ctx, char **from)
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173 {
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174 mlfiPriv &priv = *MLFIPRIV;
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175 priv.mailaddr = to_lower_string(from[0]);
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176 return SMFIS_CONTINUE;
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177 }
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178
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179 sfsistat mlfi_envrcpt(SMFICTX *ctx, char **rcpt)
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180 {
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181 mlfiPriv &priv = *MLFIPRIV;
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182 CONFIG &dc = *priv.pc;
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183 if (!priv.queueid) priv.queueid = strdup(smfi_getsymval(ctx, "i"));
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184 char *rcptaddr = to_lower_string(rcpt[0]);
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185 if (debug_syslog > 1) {
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186 char msg[maxlen];
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187 snprintf(msg, sizeof(msg), "from <%s> to <%s>", priv.mailaddr, rcptaddr);
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188 my_syslog(&priv, msg);
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189 }
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190 char *target = dc.find_to(rcptaddr);
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191 if (target) smfi_addrcpt(ctx, target);
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192 free(rcptaddr);
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193 if (!processed_from) {
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194 target = dc.find_from(priv.mailaddr);
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195 if (target) smfi_addrcpt(ctx, target);
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196 processed_from = true;
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197 }
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198 return SMFIS_CONTINUE;
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199 }
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200
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201 sfsistat mlfi_eom(SMFICTX *ctx)
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202 {
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203 // reset for a new message on the same connection
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204 mlfi_abort(ctx);
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205 return SMFIS_CONTINUE;
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206 }
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207
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208 sfsistat mlfi_abort(SMFICTX *ctx)
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209 {
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210 mlfiPriv &priv = *MLFIPRIV;
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211 if (!priv) return SMFIS_CONTINUE;
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212 priv.reset();
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213 return SMFIS_CONTINUE;
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214 }
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215
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216 sfsistat mlfi_close(SMFICTX *ctx)
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217 {
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218 mlfiPriv *priv = MLFIPRIV;
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219 if (!priv) return SMFIS_CONTINUE;
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220 delete priv;
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221 smfi_setpriv(ctx, NULL);
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222 return SMFIS_CONTINUE;
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223 }
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224
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225 struct smfiDesc smfilter =
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226 {
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227 "SM-ARCHIVE", // filter name
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228 SMFI_VERSION, // version code -- do not change
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229 SMFIF_ADDRCPT, // flags
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230 mlfi_connect, // connection info filter
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231 NULL, // SMTP HELO command filter
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232 mlfi_envfrom, // envelope sender filter
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233 mlfi_envrcpt, // envelope recipient filter
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carl
parents:
diff changeset
234 NULL, // header filter
616666e2f34c initial version
carl
parents:
diff changeset
235 NULL, // end of header
616666e2f34c initial version
carl
parents:
diff changeset
236 NULL, // body block filter
616666e2f34c initial version
carl
parents:
diff changeset
237 mlfi_eom, // end of message
616666e2f34c initial version
carl
parents:
diff changeset
238 mlfi_abort, // message aborted
616666e2f34c initial version
carl
parents:
diff changeset
239 mlfi_close, // connection cleanup
616666e2f34c initial version
carl
parents:
diff changeset
240 };
616666e2f34c initial version
carl
parents:
diff changeset
241
616666e2f34c initial version
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242
616666e2f34c initial version
carl
parents:
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243 ////////////////////////////////////////////////
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carl
parents:
diff changeset
244 // reload the config
616666e2f34c initial version
carl
parents:
diff changeset
245 //
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carl
parents:
diff changeset
246 CONFIG* new_conf();
616666e2f34c initial version
carl
parents:
diff changeset
247 CONFIG* new_conf() {
616666e2f34c initial version
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parents:
diff changeset
248 CONFIG *newc = new CONFIG;
616666e2f34c initial version
carl
parents:
diff changeset
249 pthread_mutex_lock(&config_mutex);
616666e2f34c initial version
carl
parents:
diff changeset
250 newc->generation = generation++;
616666e2f34c initial version
carl
parents:
diff changeset
251 pthread_mutex_unlock(&config_mutex);
616666e2f34c initial version
carl
parents:
diff changeset
252 if (debug_syslog) {
616666e2f34c initial version
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parents:
diff changeset
253 char buf[maxlen];
616666e2f34c initial version
carl
parents:
diff changeset
254 snprintf(buf, sizeof(buf), "loading configuration generation %d", newc->generation);
616666e2f34c initial version
carl
parents:
diff changeset
255 my_syslog(buf);
616666e2f34c initial version
carl
parents:
diff changeset
256 }
2
32b57406b656 initial version
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parents: 0
diff changeset
257 if (load_conf(*newc, "sm-archive.conf")) {
0
616666e2f34c initial version
carl
parents:
diff changeset
258 newc->load_time = time(NULL);
616666e2f34c initial version
carl
parents:
diff changeset
259 return newc;
616666e2f34c initial version
carl
parents:
diff changeset
260 }
616666e2f34c initial version
carl
parents:
diff changeset
261 delete newc;
616666e2f34c initial version
carl
parents:
diff changeset
262 return NULL;
616666e2f34c initial version
carl
parents:
diff changeset
263 }
616666e2f34c initial version
carl
parents:
diff changeset
264
616666e2f34c initial version
carl
parents:
diff changeset
265
616666e2f34c initial version
carl
parents:
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266 ////////////////////////////////////////////////
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carl
parents:
diff changeset
267 // thread to watch the old config files for changes
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carl
parents:
diff changeset
268 // and reload when needed. we also cleanup old
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carl
parents:
diff changeset
269 // configs whose reference count has gone to zero.
616666e2f34c initial version
carl
parents:
diff changeset
270 //
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carl
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diff changeset
271 void* config_loader(void *arg);
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carl
parents:
diff changeset
272 void* config_loader(void *arg) {
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carl
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diff changeset
273 typedef set<CONFIG *> configp_set;
616666e2f34c initial version
carl
parents:
diff changeset
274 configp_set old_configs;
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carl
parents:
diff changeset
275 while (loader_run) {
616666e2f34c initial version
carl
parents:
diff changeset
276 sleep(180); // look for modifications every 3 minutes
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carl
parents:
diff changeset
277 if (!loader_run) break;
616666e2f34c initial version
carl
parents:
diff changeset
278 CONFIG &dc = *config;
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carl
parents:
diff changeset
279 time_t then = dc.load_time;
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carl
parents:
diff changeset
280 struct stat st;
616666e2f34c initial version
carl
parents:
diff changeset
281 bool reload = false;
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carl
parents:
diff changeset
282 for (string_set::iterator i=dc.config_files.begin(); i!=dc.config_files.end(); i++) {
616666e2f34c initial version
carl
parents:
diff changeset
283 char *fn = *i;
616666e2f34c initial version
carl
parents:
diff changeset
284 if (stat(fn, &st)) reload = true; // file disappeared
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carl
parents:
diff changeset
285 else if (st.st_mtime > then) reload = true; // file modified
616666e2f34c initial version
carl
parents:
diff changeset
286 if (reload) break;
616666e2f34c initial version
carl
parents:
diff changeset
287 }
616666e2f34c initial version
carl
parents:
diff changeset
288 if (reload) {
616666e2f34c initial version
carl
parents:
diff changeset
289 CONFIG *newc = new_conf();
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carl
parents:
diff changeset
290 if (newc) {
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carl
parents:
diff changeset
291 // replace the global config pointer
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carl
parents:
diff changeset
292 pthread_mutex_lock(&config_mutex);
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carl
parents:
diff changeset
293 CONFIG *old = config;
616666e2f34c initial version
carl
parents:
diff changeset
294 config = newc;
616666e2f34c initial version
carl
parents:
diff changeset
295 pthread_mutex_unlock(&config_mutex);
616666e2f34c initial version
carl
parents:
diff changeset
296 if (old) old_configs.insert(old);
616666e2f34c initial version
carl
parents:
diff changeset
297 }
616666e2f34c initial version
carl
parents:
diff changeset
298 else {
616666e2f34c initial version
carl
parents:
diff changeset
299 // failed to load new config
616666e2f34c initial version
carl
parents:
diff changeset
300 my_syslog("failed to load new configuration");
2
32b57406b656 initial version
carl
parents: 0
diff changeset
301 system("echo 'failed to load new sm-archive configuration from /etc/sm-archive' | mail -s 'error in /etc/sm-archive configuration' root");
0
616666e2f34c initial version
carl
parents:
diff changeset
302 // update the load time on the current config to prevent complaining every 3 minutes
616666e2f34c initial version
carl
parents:
diff changeset
303 dc.load_time = time(NULL);
616666e2f34c initial version
carl
parents:
diff changeset
304 }
616666e2f34c initial version
carl
parents:
diff changeset
305 }
616666e2f34c initial version
carl
parents:
diff changeset
306 // now look for old configs with zero ref counts
616666e2f34c initial version
carl
parents:
diff changeset
307 for (configp_set::iterator i=old_configs.begin(); i!=old_configs.end(); ) {
616666e2f34c initial version
carl
parents:
diff changeset
308 CONFIG *old = *i;
616666e2f34c initial version
carl
parents:
diff changeset
309 if (!old->reference_count) {
616666e2f34c initial version
carl
parents:
diff changeset
310 if (debug_syslog) {
616666e2f34c initial version
carl
parents:
diff changeset
311 char buf[maxlen];
616666e2f34c initial version
carl
parents:
diff changeset
312 snprintf(buf, sizeof(buf), "freeing memory for old configuration generation %d", old->generation);
616666e2f34c initial version
carl
parents:
diff changeset
313 my_syslog(buf);
616666e2f34c initial version
carl
parents:
diff changeset
314 }
616666e2f34c initial version
carl
parents:
diff changeset
315 delete old; // destructor does all the work
616666e2f34c initial version
carl
parents:
diff changeset
316 old_configs.erase(i++);
616666e2f34c initial version
carl
parents:
diff changeset
317 }
616666e2f34c initial version
carl
parents:
diff changeset
318 else i++;
616666e2f34c initial version
carl
parents:
diff changeset
319 }
616666e2f34c initial version
carl
parents:
diff changeset
320 }
616666e2f34c initial version
carl
parents:
diff changeset
321 return NULL;
616666e2f34c initial version
carl
parents:
diff changeset
322 }
616666e2f34c initial version
carl
parents:
diff changeset
323
616666e2f34c initial version
carl
parents:
diff changeset
324
616666e2f34c initial version
carl
parents:
diff changeset
325 void usage(char *prog);
616666e2f34c initial version
carl
parents:
diff changeset
326 void usage(char *prog)
616666e2f34c initial version
carl
parents:
diff changeset
327 {
616666e2f34c initial version
carl
parents:
diff changeset
328 fprintf(stderr, "Usage: %s [-d [level]] [-c] -p sm-sock-addr [-t timeout]\n", prog);
616666e2f34c initial version
carl
parents:
diff changeset
329 fprintf(stderr, "where sm-sock-addr is for the connection to sendmail\n");
616666e2f34c initial version
carl
parents:
diff changeset
330 fprintf(stderr, " and should be one of\n");
616666e2f34c initial version
carl
parents:
diff changeset
331 fprintf(stderr, " inet:port@ip-address\n");
616666e2f34c initial version
carl
parents:
diff changeset
332 fprintf(stderr, " local:local-domain-socket-file-name\n");
616666e2f34c initial version
carl
parents:
diff changeset
333 fprintf(stderr, "-c will load and dump the config to stdout\n");
616666e2f34c initial version
carl
parents:
diff changeset
334 fprintf(stderr, "-d will set the syslog message level, currently 0 to 3\n");
616666e2f34c initial version
carl
parents:
diff changeset
335 }
616666e2f34c initial version
carl
parents:
diff changeset
336
616666e2f34c initial version
carl
parents:
diff changeset
337
616666e2f34c initial version
carl
parents:
diff changeset
338
616666e2f34c initial version
carl
parents:
diff changeset
339 void setup_socket(char *sock);
616666e2f34c initial version
carl
parents:
diff changeset
340 void setup_socket(char *sock) {
616666e2f34c initial version
carl
parents:
diff changeset
341 unlink(sock);
616666e2f34c initial version
carl
parents:
diff changeset
342 // sockaddr_un addr;
616666e2f34c initial version
carl
parents:
diff changeset
343 // memset(&addr, '\0', sizeof addr);
616666e2f34c initial version
carl
parents:
diff changeset
344 // addr.sun_family = AF_UNIX;
616666e2f34c initial version
carl
parents:
diff changeset
345 // strncpy(addr.sun_path, sock, sizeof(addr.sun_path)-1);
616666e2f34c initial version
carl
parents:
diff changeset
346 // int s = socket(AF_UNIX, SOCK_STREAM, 0);
616666e2f34c initial version
carl
parents:
diff changeset
347 // bind(s, (sockaddr*)&addr, sizeof(addr));
616666e2f34c initial version
carl
parents:
diff changeset
348 // close(s);
616666e2f34c initial version
carl
parents:
diff changeset
349 }
616666e2f34c initial version
carl
parents:
diff changeset
350
616666e2f34c initial version
carl
parents:
diff changeset
351
616666e2f34c initial version
carl
parents:
diff changeset
352 /*
616666e2f34c initial version
carl
parents:
diff changeset
353 * The signal handler function -- only gets called when a SIGCHLD
616666e2f34c initial version
carl
parents:
diff changeset
354 * is received, ie when a child terminates
616666e2f34c initial version
carl
parents:
diff changeset
355 */
616666e2f34c initial version
carl
parents:
diff changeset
356 void sig_chld(int signo)
616666e2f34c initial version
carl
parents:
diff changeset
357 {
616666e2f34c initial version
carl
parents:
diff changeset
358 int status;
616666e2f34c initial version
carl
parents:
diff changeset
359 /* Wait for any child without blocking */
616666e2f34c initial version
carl
parents:
diff changeset
360 while (waitpid(-1, &status, WNOHANG) > 0) {
616666e2f34c initial version
carl
parents:
diff changeset
361 // ignore child exit status, we only do this to cleanup zombies
616666e2f34c initial version
carl
parents:
diff changeset
362 }
616666e2f34c initial version
carl
parents:
diff changeset
363 }
616666e2f34c initial version
carl
parents:
diff changeset
364
616666e2f34c initial version
carl
parents:
diff changeset
365
616666e2f34c initial version
carl
parents:
diff changeset
366 int main(int argc, char**argv)
616666e2f34c initial version
carl
parents:
diff changeset
367 {
616666e2f34c initial version
carl
parents:
diff changeset
368 token_init();
616666e2f34c initial version
carl
parents:
diff changeset
369 bool check = false;
616666e2f34c initial version
carl
parents:
diff changeset
370 bool setconn = false;
616666e2f34c initial version
carl
parents:
diff changeset
371 int c;
616666e2f34c initial version
carl
parents:
diff changeset
372 const char *args = "p:t:d:ch";
616666e2f34c initial version
carl
parents:
diff changeset
373 extern char *optarg;
616666e2f34c initial version
carl
parents:
diff changeset
374
616666e2f34c initial version
carl
parents:
diff changeset
375 // Process command line options
616666e2f34c initial version
carl
parents:
diff changeset
376 while ((c = getopt(argc, argv, args)) != -1) {
616666e2f34c initial version
carl
parents:
diff changeset
377 switch (c) {
616666e2f34c initial version
carl
parents:
diff changeset
378 case 'p':
616666e2f34c initial version
carl
parents:
diff changeset
379 if (optarg == NULL || *optarg == '\0') {
616666e2f34c initial version
carl
parents:
diff changeset
380 fprintf(stderr, "Illegal sendmail socket: %s\n", optarg);
616666e2f34c initial version
carl
parents:
diff changeset
381 exit(EX_USAGE);
616666e2f34c initial version
carl
parents:
diff changeset
382 }
616666e2f34c initial version
carl
parents:
diff changeset
383 if (smfi_setconn(optarg) == MI_FAILURE) {
616666e2f34c initial version
carl
parents:
diff changeset
384 fprintf(stderr, "smfi_setconn failed\n");
616666e2f34c initial version
carl
parents:
diff changeset
385 exit(EX_SOFTWARE);
616666e2f34c initial version
carl
parents:
diff changeset
386 }
616666e2f34c initial version
carl
parents:
diff changeset
387 if (strncasecmp(optarg, "unix:", 5) == 0) setup_socket(optarg + 5);
616666e2f34c initial version
carl
parents:
diff changeset
388 else if (strncasecmp(optarg, "local:", 6) == 0) setup_socket(optarg + 6);
616666e2f34c initial version
carl
parents:
diff changeset
389 setconn = true;
616666e2f34c initial version
carl
parents:
diff changeset
390 break;
616666e2f34c initial version
carl
parents:
diff changeset
391
616666e2f34c initial version
carl
parents:
diff changeset
392 case 't':
616666e2f34c initial version
carl
parents:
diff changeset
393 if (optarg == NULL || *optarg == '\0') {
616666e2f34c initial version
carl
parents:
diff changeset
394 fprintf(stderr, "Illegal timeout: %s\n", optarg);
616666e2f34c initial version
carl
parents:
diff changeset
395 exit(EX_USAGE);
616666e2f34c initial version
carl
parents:
diff changeset
396 }
616666e2f34c initial version
carl
parents:
diff changeset
397 if (smfi_settimeout(atoi(optarg)) == MI_FAILURE) {
616666e2f34c initial version
carl
parents:
diff changeset
398 fprintf(stderr, "smfi_settimeout failed\n");
616666e2f34c initial version
carl
parents:
diff changeset
399 exit(EX_SOFTWARE);
616666e2f34c initial version
carl
parents:
diff changeset
400 }
616666e2f34c initial version
carl
parents:
diff changeset
401 break;
616666e2f34c initial version
carl
parents:
diff changeset
402
616666e2f34c initial version
carl
parents:
diff changeset
403 case 'c':
616666e2f34c initial version
carl
parents:
diff changeset
404 check = true;
616666e2f34c initial version
carl
parents:
diff changeset
405 break;
616666e2f34c initial version
carl
parents:
diff changeset
406
616666e2f34c initial version
carl
parents:
diff changeset
407 case 'd':
616666e2f34c initial version
carl
parents:
diff changeset
408 if (optarg == NULL || *optarg == '\0') debug_syslog = 1;
616666e2f34c initial version
carl
parents:
diff changeset
409 else debug_syslog = atoi(optarg);
616666e2f34c initial version
carl
parents:
diff changeset
410 break;
616666e2f34c initial version
carl
parents:
diff changeset
411
616666e2f34c initial version
carl
parents:
diff changeset
412 case 'h':
616666e2f34c initial version
carl
parents:
diff changeset
413 default:
616666e2f34c initial version
carl
parents:
diff changeset
414 usage(argv[0]);
616666e2f34c initial version
carl
parents:
diff changeset
415 exit(EX_USAGE);
616666e2f34c initial version
carl
parents:
diff changeset
416 }
616666e2f34c initial version
carl
parents:
diff changeset
417 }
616666e2f34c initial version
carl
parents:
diff changeset
418
616666e2f34c initial version
carl
parents:
diff changeset
419 if (check) {
616666e2f34c initial version
carl
parents:
diff changeset
420 use_syslog = false;
616666e2f34c initial version
carl
parents:
diff changeset
421 debug_syslog = 10;
616666e2f34c initial version
carl
parents:
diff changeset
422 CONFIG *conf = new_conf();
616666e2f34c initial version
carl
parents:
diff changeset
423 if (conf) {
616666e2f34c initial version
carl
parents:
diff changeset
424 conf->dump();
616666e2f34c initial version
carl
parents:
diff changeset
425 delete conf;
616666e2f34c initial version
carl
parents:
diff changeset
426 return 0;
616666e2f34c initial version
carl
parents:
diff changeset
427 }
616666e2f34c initial version
carl
parents:
diff changeset
428 else {
616666e2f34c initial version
carl
parents:
diff changeset
429 return 1; // config failed to load
616666e2f34c initial version
carl
parents:
diff changeset
430 }
616666e2f34c initial version
carl
parents:
diff changeset
431 }
616666e2f34c initial version
carl
parents:
diff changeset
432
616666e2f34c initial version
carl
parents:
diff changeset
433 if (!setconn) {
616666e2f34c initial version
carl
parents:
diff changeset
434 fprintf(stderr, "%s: Missing required -p argument\n", argv[0]);
616666e2f34c initial version
carl
parents:
diff changeset
435 usage(argv[0]);
616666e2f34c initial version
carl
parents:
diff changeset
436 exit(EX_USAGE);
616666e2f34c initial version
carl
parents:
diff changeset
437 }
616666e2f34c initial version
carl
parents:
diff changeset
438
616666e2f34c initial version
carl
parents:
diff changeset
439 if (smfi_register(smfilter) == MI_FAILURE) {
616666e2f34c initial version
carl
parents:
diff changeset
440 fprintf(stderr, "smfi_register failed\n");
616666e2f34c initial version
carl
parents:
diff changeset
441 exit(EX_UNAVAILABLE);
616666e2f34c initial version
carl
parents:
diff changeset
442 }
616666e2f34c initial version
carl
parents:
diff changeset
443
616666e2f34c initial version
carl
parents:
diff changeset
444 // switch to background mode
616666e2f34c initial version
carl
parents:
diff changeset
445 if (daemon(1,0) < 0) {
616666e2f34c initial version
carl
parents:
diff changeset
446 fprintf(stderr, "daemon() call failed\n");
616666e2f34c initial version
carl
parents:
diff changeset
447 exit(EX_UNAVAILABLE);
616666e2f34c initial version
carl
parents:
diff changeset
448 }
616666e2f34c initial version
carl
parents:
diff changeset
449
616666e2f34c initial version
carl
parents:
diff changeset
450 // write the pid
2
32b57406b656 initial version
carl
parents: 0
diff changeset
451 const char *pidpath = "/var/run/sm-archive.pid";
0
616666e2f34c initial version
carl
parents:
diff changeset
452 unlink(pidpath);
616666e2f34c initial version
carl
parents:
diff changeset
453 FILE *f = fopen(pidpath, "w");
616666e2f34c initial version
carl
parents:
diff changeset
454 if (f) {
616666e2f34c initial version
carl
parents:
diff changeset
455 #ifdef linux
616666e2f34c initial version
carl
parents:
diff changeset
456 // from a comment in the DCC source code:
616666e2f34c initial version
carl
parents:
diff changeset
457 // Linux threads are broken. Signals given the
616666e2f34c initial version
carl
parents:
diff changeset
458 // original process are delivered to only the
616666e2f34c initial version
carl
parents:
diff changeset
459 // thread that happens to have that PID. The
616666e2f34c initial version
carl
parents:
diff changeset
460 // sendmail libmilter thread that needs to hear
616666e2f34c initial version
carl
parents:
diff changeset
461 // SIGINT and other signals does not, and that breaks
616666e2f34c initial version
carl
parents:
diff changeset
462 // scripts that need to stop milters.
616666e2f34c initial version
carl
parents:
diff changeset
463 // However, signaling the process group works.
616666e2f34c initial version
carl
parents:
diff changeset
464 fprintf(f, "-%d\n", (u_int)getpgrp());
616666e2f34c initial version
carl
parents:
diff changeset
465 #else
616666e2f34c initial version
carl
parents:
diff changeset
466 fprintf(f, "%d\n", (u_int)getpid());
616666e2f34c initial version
carl
parents:
diff changeset
467 #endif
616666e2f34c initial version
carl
parents:
diff changeset
468 fclose(f);
616666e2f34c initial version
carl
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469 }
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470
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471 // initialize the thread sync objects
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472 pthread_mutex_init(&config_mutex, 0);
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473 pthread_mutex_init(&syslog_mutex, 0);
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474
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475 // drop root privs
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476 struct passwd *pw = getpwnam("sm-archive");
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477 if (pw) {
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478 if (setgid(pw->pw_gid) == -1) {
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479 my_syslog("failed to switch to group sm-archive");
0
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480 }
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481 if (setuid(pw->pw_uid) == -1) {
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482 my_syslog("failed to switch to user sm-archive");
0
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483 }
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484 }
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485
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486 // load the initial config
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487 config = new_conf();
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488 if (!config) {
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489 my_syslog("failed to load initial configuration, quitting");
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490 exit(1);
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491 }
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492
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493 // only create threads after the fork() in daemon
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494 pthread_t tid;
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495 if (pthread_create(&tid, 0, config_loader, 0))
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496 my_syslog("failed to create config loader thread");
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497 if (pthread_detach(tid))
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498 my_syslog("failed to detach config loader thread");
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499
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500 time_t starting = time(NULL);
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501 int rc = smfi_main();
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502 if ((rc != MI_SUCCESS) && (time(NULL) > starting+5*60)) {
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503 my_syslog("trying to restart after smfi_main()");
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504 loader_run = false; // eventually the config loader thread will terminate
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505 execvp(argv[0], argv);
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506 }
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507 exit((rc == MI_SUCCESS) ? 0 : EX_UNAVAILABLE);
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508 }
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509