log.c

   1 /*
   2 Copyright (c) 2003-2006 by Juliusz Chroboczek
   3
   4 Permission is hereby granted, free of charge, to any person obtaining a copy
   5 of this software and associated documentation files (the "Software"), to deal
   6 in the Software without restriction, including without limitation the rights
   7 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   8 copies of the Software, and to permit persons to whom the Software is
   9 furnished to do so, subject to the following conditions:
  10
  11 The above copyright notice and this permission notice shall be included in
  12 all copies or substantial portions of the Software.
  13
  14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
  17 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  18 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  19 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  20 THE SOFTWARE.
  21 */
  22
  23 #include "polipo.h"
  24
  25 int logLevel = LOGGING_DEFAULT;
  26 AtomPtr logFile = NULL;
  27 FILE *logF;
  28
  29 #define STR(x) XSTR(x)
  30 #define XSTR(x) #x
  31
  32 void
  33 preinitLog()
  34 {
  35     CONFIG_VARIABLE_SETTABLE(logLevel, CONFIG_HEX, configIntSetter,
  36                              "Logging level (max = " STR(LOGGING_MAX) ").");
  37     CONFIG_VARIABLE(logFile, CONFIG_ATOM, "Log file (stderr if empty).");
  38     logF = stderr;
  39 }
  40
  41 void
  42 initLog()
  43 {
  44     if(daemonise && logFile == NULL)
  45         logFile = internAtom("/var/log/polipo");
  46
  47     if(logFile != NULL && logFile->length > 0) {
  48         FILE *f;
  49         f = fopen(logFile->string, "a");
  50         if(f == NULL) {
  51             do_log_error(L_ERROR, errno, "Couldn't open log file %s",
  52                          logFile->string);
  53             exit(1);
  54         }
  55         setvbuf(f, NULL, _IOLBF, 0);
  56         logF = f;
  57     }
  58 }
  59
  60 void
  61 reopenLog()
  62 {
  63     if(logFile) {
  64         FILE *f;
  65         f = fopen(logFile->string, "a");
  66         if(f == NULL) {
  67             do_log_error(L_ERROR, errno, "Couldn't reopen log file %s",
  68                          logFile->string);
  69             exit(1);
  70         }
  71         setvbuf(f, NULL, _IOLBF, 0);
  72         fclose(logF);
  73         logF = f;
  74     }
  75 }
  76
  77 void
  78 really_do_log(int type, const char *f, ...)
  79 {
  80     va_list args;
  81
  82     va_start(args, f);
  83     if(type & LOGGING_MAX & logLevel)
  84         really_do_log_v(type, f, args);
  85     va_end(args);
  86 }
  87
  88 void
  89 really_do_log_v(int type, const char *f, va_list args)
  90 {
  91     if(type & LOGGING_MAX & logLevel)
  92         vfprintf(logF, f, args);
  93 }
  94
  95 void
  96 really_do_log_error(int type, int e, const char *f, ...)
  97 {
  98     va_list args;
  99     va_start(args, f);
 100     if(type & LOGGING_MAX & logLevel)
 101         really_do_log_error_v(type, e, f, args);
 102     va_end(args);
 103 }
 104
 105 void
 106 really_do_log_error_v(int type, int e, const char *f, va_list args)
 107 {
 108     if((type & LOGGING_MAX & logLevel) != 0) {
 109         char *es = pstrerror(e);
 110         if(es == NULL)
 111             es = "Unknown error";
 112         vfprintf(logF, f, args);
 113         fprintf(logF, ": %s (%d)\n", es, e);
 114     }
 115 }
 116
 117 void
 118 really_do_log_n(int type, const char *s, int n)
 119 {
 120     if((type & LOGGING_MAX & logLevel) != 0) {
 121         fwrite(s, n, 1, logF);
 122     }
 123 }