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annotate src/log.c @ 410:cff967b2f51e

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Minor comment rework.
author markus schnalke <meillo@marmaro.de>
date Wed, 29 Feb 2012 12:05:47 +0100
parents 5f0829f8e6c7
children 19be3b27df6f
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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.
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18 */
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19
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20 #include <sys/stat.h>
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21 #include <sysexits.h>
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22
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23 #include "masqmail.h"
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24
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25 static char *_sysexit_strings[] = {
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26 "command line usage error",
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27 "data format error",
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28 "cannot open input",
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29 "addressee unknown",
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30 "host name unknown",
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31 "service unavailable",
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32 "internal software error",
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33 "system error (e.g., can't fork)",
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34 "critical OS file missing",
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35 "can't create (user) output file",
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36 "input/output error",
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37 "temp failure; user is invited to retry",
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38 "remote error in protocol",
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39 "permission denied",
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40 "configuration error"
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41 };
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42
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43 gchar*
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44 ext_strerror(int err)
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45 {
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46 if (err < 1024)
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47 return strerror(err);
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48 else if (err > 1024 + EX__BASE
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49 && (err - 1024 - EX__BASE < sizeof(_sysexit_strings) / sizeof(_sysexit_strings[0])))
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50 return _sysexit_strings[err - 1024 - EX__BASE];
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51
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52 return "unknown error";
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53 }
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54
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55 static FILE *logfile = NULL;
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56 static FILE *debugfile = NULL;
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57
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58 gboolean
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59 logopen()
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60 {
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61 gchar *filename;
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62 mode_t saved_mode = umask(066);
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63
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64 if (conf.use_syslog) {
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65 openlog(PACKAGE, LOG_PID, LOG_MAIL);
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66 } else {
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67 uid_t saved_uid;
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68 gid_t saved_gid;
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69
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70 if (!conf.run_as_user) {
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71 set_euidgid(conf.mail_uid, conf.mail_gid, &saved_uid, &saved_gid);
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72 }
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73
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74 filename = g_strdup_printf("%s/masqmail.log", conf.log_dir);
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75 logfile = fopen(filename, "a");
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76 if (!logfile) {
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77 fprintf(stderr, "could not open log '%s': %s\n", filename, strerror(errno));
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78 return FALSE;
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79 }
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80 g_free(filename);
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82 if (!conf.run_as_user) {
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83 set_euidgid(saved_uid, saved_gid, NULL, NULL);
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84 }
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85 }
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86
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87 #ifdef ENABLE_DEBUG
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88 if (conf.debug_level > 0) {
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89 filename = g_strdup_printf("%s/debug.log", conf.log_dir);
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90 debugfile = fopen(filename, "a");
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91 if (!debugfile) {
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92 fprintf(stderr, "could not open debug log '%s'\n", filename);
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93 return FALSE;
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94 }
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95 g_free(filename);
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96 }
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97 #endif
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98 umask(saved_mode);
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99 return TRUE;
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100 }
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101
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102 void
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103 logclose()
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104 {
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105 if (conf.use_syslog)
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106 closelog();
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107 else if (logfile)
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108 fclose(logfile);
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109 if (debugfile)
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110 fclose(debugfile);
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111 }
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112
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113 void
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114 vlogwrite(int pri, const char *fmt, va_list args)
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115 {
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116 if ((conf.do_verbose && (pri & LOG_VERBOSE)) || (pri == LOG_ALERT) || (pri == LOG_WARNING)) {
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117 va_list args_copy;
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118 va_copy(args_copy, args);
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119 vfprintf(stdout, fmt, args_copy);
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120 va_end(args_copy);
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121 fflush(stdout); /* in case output ends not with newline */
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122 }
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123
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124 pri &= ~LOG_VERBOSE;
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125 if (!pri) {
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126 return;
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127 }
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128 if (conf.use_syslog) {
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129 vsyslog(pri, fmt, args);
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130 return;
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131 }
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132 FILE *file = logfile ? logfile : stderr;
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133 time_t now = time(NULL);
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134 struct tm *t = localtime(&now);
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135 gchar buf[24];
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136
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137 strftime(buf, 24, "%Y-%m-%d %H:%M:%S", t);
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138 fprintf(file, "%s [%d] ", buf, getpid());
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139
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140 vfprintf(file, fmt, args);
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141 fflush(file);
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142 }
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143
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144 #ifdef ENABLE_DEBUG
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145 void
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146 vdebugwrite(int pri, const char *fmt, va_list args)
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147 {
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148 time_t now = time(NULL);
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149 struct tm *t = localtime(&now);
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150 gchar buf[24];
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151 strftime(buf, 24, "%Y-%m-%d %H:%M:%S", t);
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152
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153 if (debugfile) {
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154 fprintf(debugfile, "%s [%d] ", buf, getpid());
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155 vfprintf(debugfile, fmt, args);
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156 fflush(debugfile);
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157 } else {
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158 fprintf(stderr, "no debug file, msg was:\n");
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159 vfprintf(stderr, fmt, args);
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160 }
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161 }
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162 #endif
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163
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164 void
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165 logwrite(int pri, const char *fmt, ...)
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166 {
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167 va_list args, args_copy;
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168 int saved_errno = errno; /* somewhere this is changed to EBADF */
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169
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170 va_start(args, fmt);
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171 #ifdef ENABLE_DEBUG
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172 va_copy(args_copy, args);
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173 #endif
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174 vlogwrite(pri, fmt, args);
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175 #ifdef ENABLE_DEBUG
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176 if (debugfile)
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177 vdebugwrite(pri, fmt, args_copy);
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178 va_end(args_copy);
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179 #endif
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180 va_end(args);
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181
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182 errno = saved_errno;
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183 }
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184
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185 #ifdef ENABLE_DEBUG
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186 void
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187 debugf(const char *fmt, ...)
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188 {
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189 va_list args;
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190 va_start(args, fmt);
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191
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192 vdebugwrite(LOG_DEBUG, fmt, args);
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193
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194 va_end(args);
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195 }
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196
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197 void
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198 vdebugf(const char *fmt, va_list args)
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199 {
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200 vdebugwrite(LOG_DEBUG, fmt, args);
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201 }
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202 #endif
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203
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204 void
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205 maillog(const char *fmt, ...)
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206 {
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207 va_list args;
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208 va_start(args, fmt);
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209
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210 vlogwrite(LOG_NOTICE, fmt, args);
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211
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212 va_end(args);
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213 }