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annotate logging.c @ 251:307fd62f376d

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Implement log file rotation
author Daniele Nicolodi <daniele@grinta.net>
date Thu, 28 May 2015 16:12:18 +0200
parents eaac96094640
children d948e3ced2b9
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #include <ansi_c.h>
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2 #include <inifile.h>
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3 #include <lowlvlio.h>
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4 #include <ansi_c.h>
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5
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6 #include "config.h"
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7 #include "logging.h"
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8
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9 /* this refers to the event time defined as a global variable in the main program */
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10 extern double utc;
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11 /* main panel id */
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12 extern unsigned int MainPanel;
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13
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14
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15 struct logger {
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16 unsigned int panel;
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17 char *dirpath;
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18 char *filepath;
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19 int fd;
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20 int level;
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21 int yday;
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22 void(*onerror)(int, const char *);
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23 };
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24
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25
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26 static inline int strtolevel(const char *str)
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27 {
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28 for (int i = 0; i < 4; i++) {
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29 if (streq(levels[i], str))
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30 return i;
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31 }
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32 return DEBUG;
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33 }
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34
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35
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36 static int rotate(struct logger *l, struct tm *t)
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37 {
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38 int rv;
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39 char id[7];
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40
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41 if (! l->dirpath)
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42 return;
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43
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44 if (l->yday == t.rm_yday)
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45 return 0;
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46
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47 /* close old file descriptor */
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48 close(l->fd);
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49 l->fd = -1;
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50
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51 /* construct new file name */
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52 strftime(id, sizeof(id), "%y%m%d", t);
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53 rv = asprintf(&l->filepath, "%s\\%s-Log.txt", l->dirpath, id);
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54 if (rv < 0)
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55 return rv;
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56
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57 /* open new log file */
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58 rv = open(filename, O_CREAT|O_WRONLY|O_APPEND, 00744);
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59 if (rv < 0)
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60 return rv;
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61
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62 /* update status */
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63 l->fd = rv;
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64 l->yday = t.rm_yday;
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65
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66 return 1;
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67 }
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68
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69
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70 int __logger_init(struct logger *l, void(*onerror)(int, const char *))
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71 {
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72 int rv, panel;
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73 char path[MAX_PATHNAME_LEN], *filename;
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74
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75 l = malloc(sizeof(struct logger));
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76 memset(l, 0, sizeof(*l));
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77
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78 l->onerror = onerror;
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79 l->fd = -1;
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80 l->level = DEBUG;
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81
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82 panel = LoadPanel(0, "FXAnalyse.uir", LOGGING);
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83 if (panel < 0)
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84 return -1;
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85 l->panel = panel;
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86
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87 /* configuration file path */
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88 GetIniFilePath(path);
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89
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90 /* load configuration file */
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91 IniText configuration = Ini_New(TRUE);
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92 Ini_ReadFromFile(configuration, path);
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93
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94 /* logging folder path */
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95 rv = Ini_GetStringCopy(configuration, "logging", "folder", &l->dirname);
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96
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97 /* logging level */
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98 rv = Ini_GetStringCopy(configuration, "logging", "level", &str);
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99 if (rv > 0) {
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100 l->level = strtolevel(str);
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101 free(str);
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102 }
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103
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104 Ini_Dispose(configuration);
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105
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106 return 0;
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107 }
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108
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109
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110 void __logmessage(struct logger *l, enum loglevel level, const char *frmt, ...)
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111 {
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112 static const char *levels[] = {
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113 [ERROR] = "ERROR",
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114 [DEBUG] = "DEBUG",
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115 [INFO] = "INFO",
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116 [WARNING] = "WARNING",
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117 };
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118
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119 char msg[1024];
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120 int len = 0;
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121
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122 /* timestamp */
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123 len += sprintf(msg, "%014.3f ", utc);
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124 time_t now = (time_t)utc;
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125 if (now == 0)
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126 now = time(NULL);
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127 struct tm *t = localtime(&now);
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128 len += strftime(msg + len, sizeof(msg) - len, "%d-%m-%Y %H:%M:%S ", t);
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129
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130 /* level */
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131 len += snprintf(msg + len, sizeof(msg) - len, "%s: ", levels[level]);
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132
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133 /* message */
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134 va_list args;
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135 va_start(args, frmt);
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136 len += vsnprintf(msg + len, sizeof(msg) - len, frmt, args);
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137 va_end(args);
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138
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139 /* newline */
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140 len = MIN(len, sizeof(msg) - 3);
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141 msg[len++] = '\r';
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142 msg[len++] = '\n';
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143
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144 /* string terminator */
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145 msg[len] = '\0';
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146
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147 /* display message */
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148 SetCtrlVal(l->panel, LOGGING_LOGGING, msg);
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149
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150 /* report error */
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151 if (level == ERROR)
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152 l->onerror(level, msg);
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153
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154 /* rotate log file based on current date */
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155 rotate(l, t);
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156
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157 /* write to log file */
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158 if ((level <= l->level) && (l->fd >= 0))
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159 write(l->fd, msg, len);
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160 }
251
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161
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162
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163 void __logger_panel_visible(struct logger *l, visible)
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164 {
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165 SetPanelAttribute(l->panel, ATTR_VISIBLE, visible);
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166 }