flog_output_file.c

   1 //! file output for Flog
   2
   3 //! @file flog_output_file.c
   4 //! @author Nabeel Sowan (nabeel.sowan@vibes.se)
   5 //!
   6 //! When you want flog to write to a file
   7 //! Choose logfile name by setting data to string
   8
   9
  10 #include "flog_output_file.h"
  11
  12 #ifdef FLOG_CONFIG_OUTPUT_FILE
  13
  14 #include "flog_string.h"
  15 #include <stdlib.h>
  16 #include <stdio.h>
  17 #include <string.h>
  18
  19
  20 //! Output function for simple log output to a file
  21 //! filename is stored in log.output_func_data as a string
  22
  23 //! @retval 0 success
  24 int flog_output_file(FLOG_T *log,const FLOG_MSG_T *msg)
  25 {
  26         if(log->output_func_data==NULL) {
  27                 log->output_error=1;
  28                 flog_print(log->error_log,"flog_output_file",FLOG_ERROR,0,"please set log output filename");
  29                 return(-1);
  30         }
  31         char *str;
  32         if(flog_get_str_message(&str,msg))
  33                 return(-1);
  34
  35         FILE *f;
  36         if((f = fopen(log->output_func_data,"a+t"))==NULL) {
  37                 log->output_error=1;
  38                 free(str);
  39                 flog_printf(log->error_log,"fopen",FLOG_ERROR,0,"cannot open file: %s",log->output_func_data);
  40                 return(-2);
  41         }
  42         if(fprintf(f,str)<0) {
  43                 log->output_error=1;
  44                 free(str);
  45                 flog_printf(log->error_log,"fprintf",FLOG_ERROR,0,"cannot write to file: %s",log->output_func_data);
  46                 return(-2);
  47         }
  48         free(str);
  49         if(fclose(f)==EOF) {
  50                 log->output_error=1;
  51                 flog_printf(log->error_log,"fflush",FLOG_ERROR,0,"cannot write to file: %s",log->output_func_data);
  52                 return(-2);
  53         }
  54         return(0);
  55 }
  56
  57
  58 //! create and return a log that writes to file
  59
  60 //! @retval NULL error
  61 FLOG_T * create_flog_output_file(const char *name, FLOG_MSG_TYPE_T accepted_msg_type, const char *filename)
  62 {
  63         FLOG_T *p;
  64         if((p=create_flog_t(name,accepted_msg_type))==NULL)
  65                 return(NULL);
  66         p->output_func=flog_output_file;
  67         if(filename && filename[0]) {
  68                 if((p->output_func_data=strdup(filename))==NULL) {
  69                         destroy_flog_t(p);
  70                         return(NULL);
  71                 }
  72         }
  73         return(p);
  74 }
  75
  76
  77 //! free an output_file FLOG_T
  78 void destroy_flog_output_file(FLOG_T *p)
  79 {
  80         if(p!=NULL) {
  81                 free(p->output_func_data);
  82                 p->output_func_data=NULL;
  83                 destroy_flog_t(p);
  84         }
  85 }
  86
  87
  88 #endif //FLOG_CONFIG_OUTPUT_FILE