log.c

   1 /*
   2  * User FTP Server,  Share folders over FTP without being root.
   3  * Copyright (C) 2008  Isaac Jurado
   4  *
   5  * This program is free software; you can redistribute it and/or modify it under
   6  * the terms of the GNU General Public License as published by the Free Software
   7  * Foundation; either version 2 of the License, or (at your option) any later
   8  * version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  12  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
  13  * details.
  14  *
  15  * You should have received a copy of the GNU General Public License along with
  16  * this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
  18  */
  19
  20 #include "uftps.h"
  21 #ifdef __MINGW32__
  22 #  include "hase.h"
  23 #else
  24 #  include <unistd.h>
  25 #endif
  26 #include <stdarg.h>
  27 #include <errno.h>
  28 #include <stdlib.h>
  29 #include <stdio.h>
  30 #include <string.h>
  31
  32
  33 /*
  34  * Logging utility.  Display a printf()-like formatted message (msg, args) with
  35  * the current PID and a severity label at the beginning of the line.  If
  36  * show_error is true, append a human readable version of the last system error.
  37  */
  38 static void message (      int      show_error,
  39                      const char    *severity,
  40                      const char    *msg,
  41                            va_list  args)
  42 {
  43         int  error_code;
  44
  45         error_code = errno;
  46
  47         printf("(%5d) [%-7s] ", (int) getpid(), severity);
  48         vprintf(msg, args);
  49
  50         if (show_error && error_code != 0)
  51                 printf(": %s.\n", strerror(error_code));
  52         else
  53                 puts(".");
  54 }
  55
  56
  57 /*
  58  * Debug message.  Only enabled for debug compilations.
  59  */
  60 #ifdef DEBUG
  61 void debug (const char *msg, ...)
  62 {
  63         va_list  args;
  64
  65         va_start(args, msg);
  66         message(0, "DEBUG", msg, args);
  67         va_end(args);
  68 }
  69 #endif
  70
  71
  72 /*
  73  * Informational message.
  74  */
  75 void notice (const char *msg, ...)
  76 {
  77         va_list  args;
  78
  79         va_start(args, msg);
  80         message(0, "NOTICE", msg, args);
  81         va_end(args);
  82 }
  83
  84
  85 /*
  86  * Program error message.
  87  */
  88 void warning (const char *msg, ...)
  89 {
  90         va_list  args;
  91
  92         va_start(args, msg);
  93         message(0, "WARNING", msg, args);
  94         va_end(args);
  95 }
  96
  97
  98 /*
  99  * System error message.  Displays system error information when the last error
 100  * code is not zero.
 101  */
 102 void error (const char *msg, ...)
 103 {
 104         va_list  args;
 105
 106         va_start(args, msg);
 107         message(1, "ERROR", msg, args);
 108         va_end(args);
 109 }
 110
 111
 112 /*
 113  * Fatal error.  Displays a message similar to error() but also terminates the
 114  * current process.
 115  */
 116 void fatal (const char *msg, ...)
 117 {
 118         va_list  args;
 119
 120         va_start(args, msg);
 121         message(1, "FATAL", msg, args);
 122         va_end(args);
 123
 124         exit(EXIT_FAILURE);
 125 }
 126