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annotate src/log.c @ 371:f122535c589e

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Refactoring: early failure exit.
author markus schnalke <meillo@marmaro.de>
date Tue, 25 Oct 2011 13:51:43 +0200
parents b27f66555ba8
children 9bc3e47b0222
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1 /*
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2 ** MasqMail
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3 ** Copyright (C) 1999-2001 Oliver Kurth
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4 **
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5 ** This program is free software; you can redistribute it and/or modify
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6 ** it under the terms of the GNU General Public License as published by
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7 ** the Free Software Foundation; either version 2 of the License, or
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8 ** (at your option) any later version.
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9 **
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10 ** This program is distributed in the hope that it will be useful,
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11 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 ** GNU General Public License for more details.
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14 **
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15 ** You should have received a copy of the GNU General Public License
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16 ** along with this program; if not, write to the Free Software
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17 ** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
0
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18 */
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19
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20 #include <sysexits.h>
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21
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22 #include "masqmail.h"
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23
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24 static char *_sysexit_strings[] = {
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25 "command line usage error",
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26 "data format error",
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27 "cannot open input",
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28 "addressee unknown",
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29 "host name unknown",
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30 "service unavailable",
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31 "internal software error",
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32 "system error (e.g., can't fork)",
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33 "critical OS file missing",
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34 "can't create (user) output file",
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35 "input/output error",
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36 "temp failure; user is invited to retry",
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37 "remote error in protocol",
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38 "permission denied",
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39 "configuration error"
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40 };
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41
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42 gchar*
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43 ext_strerror(int err)
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44 {
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45 if (err < 1024)
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46 return strerror(err);
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47 else if (err > 1024 + EX__BASE
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48 && (err - 1024 - EX__BASE < sizeof(_sysexit_strings) / sizeof(_sysexit_strings[0])))
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49 return _sysexit_strings[err - 1024 - EX__BASE];
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50
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51 return "unknown error";
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52 }
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53
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54 static FILE *logfile = NULL;
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55 static FILE *debugfile = NULL;
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56
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57 gboolean
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58 logopen()
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59 {
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60 gchar *filename;
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61 mode_t saved_mode = umask(066);
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62
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63 if (conf.use_syslog) {
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64 openlog(PACKAGE, LOG_PID, LOG_MAIL);
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65 } else {
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66 uid_t saved_uid;
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67 gid_t saved_gid;
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68
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69 if (!conf.run_as_user) {
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70 set_euidgid(conf.mail_uid, conf.mail_gid, &saved_uid, &saved_gid);
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71 }
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72
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73 filename = g_strdup_printf("%s/masqmail.log", conf.log_dir);
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74 logfile = fopen(filename, "a");
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75 if (!logfile) {
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76 fprintf(stderr, "could not open log '%s': %s\n", filename, strerror(errno));
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77 return FALSE;
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78 }
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79 g_free(filename);
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81 if (!conf.run_as_user) {
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82 set_euidgid(saved_uid, saved_gid, NULL, NULL);
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83 }
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84 }
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85
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86 #ifdef ENABLE_DEBUG
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87 if (conf.debug_level > 0) {
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88 filename = g_strdup_printf("%s/debug.log", conf.log_dir);
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89 debugfile = fopen(filename, "a");
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90 if (!debugfile) {
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91 fprintf(stderr, "could not open debug log '%s'\n", filename);
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92 return FALSE;
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93 }
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94 g_free(filename);
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95 }
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96 #endif
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97 umask(saved_mode);
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98 return TRUE;
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99 }
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100
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101 void
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102 logclose()
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103 {
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104 if (conf.use_syslog)
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105 closelog();
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106 else if (logfile)
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107 fclose(logfile);
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108 if (debugfile)
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109 fclose(debugfile);
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110 }
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111
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112 void
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113 vlogwrite(int pri, const char *fmt, va_list args)
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114 {
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115 if ((conf.do_verbose && (pri & LOG_VERBOSE)) || (pri == LOG_ALERT) || (pri == LOG_WARNING)) {
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116 va_list args_copy;
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117 va_copy(args_copy, args);
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118 vfprintf(stdout, fmt, args_copy);
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119 va_end(args_copy);
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120 fflush(stdout); /* in case output ends not with newline */
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121 }
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122
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123 pri &= ~LOG_VERBOSE;
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124 if (!pri) {
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125 return;
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126 }
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127 if (conf.use_syslog)
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128 vsyslog(pri, fmt, args);
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129 else if (pri <= conf.log_max_pri) {
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130 FILE *file = logfile ? logfile : stderr;
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131 time_t now = time(NULL);
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132 struct tm *t = localtime(&now);
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133 gchar buf[24];
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134
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135 strftime(buf, 24, "%Y-%m-%d %H:%M:%S", t);
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136 fprintf(file, "%s [%d] ", buf, getpid());
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137
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138 vfprintf(file, fmt, args);
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139 fflush(file);
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140 }
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141 }
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142
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143 #ifdef ENABLE_DEBUG
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144 void
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145 vdebugwrite(int pri, const char *fmt, va_list args)
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146 {
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147 time_t now = time(NULL);
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148 struct tm *t = localtime(&now);
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149 gchar buf[24];
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150 strftime(buf, 24, "%Y-%m-%d %H:%M:%S", t);
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151
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152 if (debugfile) {
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153 fprintf(debugfile, "%s [%d] ", buf, getpid());
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154 vfprintf(debugfile, fmt, args);
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155 fflush(debugfile);
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156 } else {
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157 fprintf(stderr, "no debug file, msg was:\n");
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158 vfprintf(stderr, fmt, args);
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159 }
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160 }
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161 #endif
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162
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163 void
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164 logwrite(int pri, const char *fmt, ...)
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165 {
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166 va_list args, args_copy;
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167 int saved_errno = errno; /* somewhere this is changed to EBADF */
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168
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169 va_start(args, fmt);
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170 #ifdef ENABLE_DEBUG
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171 va_copy(args_copy, args);
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172 #endif
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173 vlogwrite(pri, fmt, args);
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174 #ifdef ENABLE_DEBUG
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175 if (debugfile)
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176 vdebugwrite(pri, fmt, args_copy);
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177 va_end(args_copy);
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178 #endif
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179 va_end(args);
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180
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181 errno = saved_errno;
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182 }
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183
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184 #ifdef ENABLE_DEBUG
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185 void
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186 debugf(const char *fmt, ...)
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187 {
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188 va_list args;
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189 va_start(args, fmt);
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190
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191 vdebugwrite(LOG_DEBUG, fmt, args);
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192
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193 va_end(args);
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194 }
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195
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196 void
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197 vdebugf(const char *fmt, va_list args)
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198 {
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199 vdebugwrite(LOG_DEBUG, fmt, args);
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200 }
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201 #endif
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202
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203 void
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204 maillog(const char *fmt, ...)
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205 {
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206 va_list args;
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207 va_start(args, fmt);
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208
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209 vlogwrite(LOG_NOTICE, fmt, args);
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210
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211 va_end(args);
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212 }