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0
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1 /*
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2 failures.c : Failure manager
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3
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4 Copyright (c) 2001-2002 Timo Sirainen
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5
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6 Permission is hereby granted, free of charge, to any person obtaining
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7 a copy of this software and associated documentation files (the
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8 "Software"), to deal in the Software without restriction, including
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9 without limitation the rights to use, copy, modify, merge, publish,
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10 distribute, sublicense, and/or sell copies of the Software, and to
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11 permit persons to whom the Software is furnished to do so, subject to
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12 the following conditions:
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13
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14 The above copyright notice and this permission notice shall be
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15 included in all copies or substantial portions of the Software.
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16
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17 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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18 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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19 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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20 IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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21 CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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22 TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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23 SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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24 */
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25
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26
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27 #include "lib.h"
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28 #include "ioloop.h"
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29
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30 #include <stdio.h>
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31 #include <syslog.h>
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32 #include <time.h>
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33
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34 static FailureFunc panic_handler __attr_noreturn__, fatal_handler __attr_noreturn__;
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35 static FailureFunc error_handler, warning_handler;
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36
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37 static FILE *log_fd;
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38 static char *log_prefix, *log_stamp_format;
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39
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40 static void default_panic_handler(const char *format, va_list args)
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41 __attr_noreturn__;
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42 static void default_fatal_handler(const char *format, va_list args)
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43 __attr_noreturn__;
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44
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45 static void write_prefix(void)
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46 {
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47 struct tm *tm;
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48 char str[256];
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49
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50 if (log_prefix != NULL)
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51 fputs(log_prefix, log_fd);
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52
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53 if (log_stamp_format != NULL) {
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54 tm = localtime(&ioloop_time);
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55
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56 if (strftime(str, sizeof(str), log_stamp_format, tm) > 0)
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57 fputs(str, log_fd);
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58 }
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59 }
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60
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61 static void default_panic_handler(const char *format, va_list args)
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62 {
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63 write_prefix();
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64
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65 fputs("Panic: ", log_fd);
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66 vfprintf(log_fd, format, args);
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67 fputc('\n', log_fd);
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68
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69 abort();
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70 }
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71
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72 static void default_fatal_handler(const char *format, va_list args)
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73 {
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74 write_prefix();
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75
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76 fputs("Fatal: ", log_fd);
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77 vfprintf(log_fd, format, args);
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78 fputc('\n', log_fd);
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79
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80 exit(98);
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81 }
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82
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83 static void default_error_handler(const char *format, va_list args)
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84 {
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85 write_prefix();
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86
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87 fputs("Error: ", log_fd);
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88 vfprintf(log_fd, format, args);
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89 fputc('\n', log_fd);
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90
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91 fflush(log_fd);
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92 }
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93
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94 static void default_warning_handler(const char *format, va_list args)
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95 {
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96 write_prefix();
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97
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98 fputs("Warning: ", log_fd);
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99 vfprintf(log_fd, format, args);
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100 fputc('\n', log_fd);
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101
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102 fflush(log_fd);
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103 }
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104
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105 void i_panic(const char *format, ...)
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106 {
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107 va_list args;
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108
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109 va_start(args, format);
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110 panic_handler(format, args);
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111 va_end(args);
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112 }
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113
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114 void i_fatal(const char *format, ...)
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115 {
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116 va_list args;
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117
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118 va_start(args, format);
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119 fatal_handler(format, args);
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120 va_end(args);
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121 }
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122
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123 void i_error(const char *format, ...)
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124 {
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125 va_list args;
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126
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127 va_start(args, format);
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128 error_handler(format, args);
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129 va_end(args);
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130 }
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131
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132 void i_warning(const char *format, ...)
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133 {
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134 va_list args;
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135
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136 va_start(args, format);
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137 warning_handler(format, args);
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138 va_end(args);
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139 }
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140
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141 void i_set_panic_handler(FailureFunc func __attr_noreturn__)
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142 {
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143 if (func == NULL)
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144 func = default_panic_handler;
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145 panic_handler = func;
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146 }
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147
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148 void i_set_fatal_handler(FailureFunc func __attr_noreturn__)
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149 {
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150 if (func == NULL)
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151 func = default_fatal_handler;
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152 fatal_handler = func;
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153 }
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154
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155 void i_set_error_handler(FailureFunc func)
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156 {
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157 if (func == NULL)
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158 func = default_error_handler;
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159 error_handler = func;
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160 }
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161
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162 void i_set_warning_handler(FailureFunc func)
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163 {
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164 if (func == NULL)
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165 func = default_warning_handler;
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166 warning_handler = func;
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167 }
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168
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169 void i_syslog_panic_handler(const char *fmt, va_list args)
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170 {
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171 vsyslog(LOG_CRIT, fmt, args);
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172 abort();
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173 }
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174
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175 void i_syslog_fatal_handler(const char *fmt, va_list args)
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176 {
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177 vsyslog(LOG_CRIT, fmt, args);
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178 exit(98);
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179 }
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180
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181 void i_syslog_error_handler(const char *fmt, va_list args)
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182 {
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183 vsyslog(LOG_ERR, fmt, args);
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184 }
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185
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186 void i_syslog_warning_handler(const char *fmt, va_list args)
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187 {
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188 vsyslog(LOG_WARNING, fmt, args);
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189 }
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190
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191 void i_set_failure_file(const char *path, const char *prefix)
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192 {
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193 if (log_fd != stderr)
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194 (void)fclose(log_fd);
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195
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196 log_fd = fopen(path, "a");
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197 if (log_fd == NULL)
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198 i_fatal("Can't open log file %s: %m", path);
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199
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200 i_free(log_prefix);
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201 log_prefix = i_strconcat(prefix, ": ", NULL);
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202 }
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203
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204 void i_set_failure_timestamp_format(const char *fmt)
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205 {
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206 i_free(log_stamp_format);
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207 log_stamp_format = i_strdup(fmt);
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208 }
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209
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210 void failures_init(void)
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211 {
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212 log_fd = stderr;
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213 log_prefix = NULL;
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214 log_stamp_format = NULL;
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215
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216 i_set_panic_handler(NULL);
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217 i_set_fatal_handler(NULL);
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218 i_set_error_handler(NULL);
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219 i_set_warning_handler(NULL);
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220 }
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221
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222 void failures_deinit(void)
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223 {
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224 if (log_fd != stderr) {
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225 (void)fclose(log_fd);
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226 log_fd = stderr;
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227 }
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228 }
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