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         /*
  48          * The value in SS.pid prevents calling getpid() for each message,
  49          * saving the expense of a system call.
  50          */
  51         printf("(%5d) [%-7s] ", SS.pid, severity);
  52         vprintf(msg, args);
  53
  54         if (show_error && error_code != 0)
  55                 printf(": %s.\n", strerror(error_code));
  56         else
  57                 puts(".");
  58 }
  59
  60
  61 /*
  62  * Debug message.  Only enabled for debug compilations.
  63  */
  64 #ifdef DEBUG
  65 void debug (const char *msg, ...)
  66 {
  67         va_list  args;
  68
  69         va_start(args, msg);
  70         message(0, "DEBUG", msg, args);
  71         va_end(args);
  72 }
  73 #endif
  74
  75
  76 /*
  77  * Informational message.
  78  */
  79 void notice (const char *msg, ...)
  80 {
  81         va_list  args;
  82
  83         va_start(args, msg);
  84         message(0, "NOTICE", msg, args);
  85         va_end(args);
  86 }
  87
  88
  89 /*
  90  * Program error message.
  91  */
  92 void warning (const char *msg, ...)
  93 {
  94         va_list  args;
  95
  96         va_start(args, msg);
  97         message(0, "WARNING", msg, args);
  98         va_end(args);
  99 }
 100
 101
 102 /*
 103  * System error message.  Displays system error information when the last error
 104  * code is not zero.
 105  */
 106 void error (const char *msg, ...)
 107 {
 108         va_list  args;
 109
 110         va_start(args, msg);
 111         message(1, "ERROR", msg, args);
 112         va_end(args);
 113 }
 114
 115
 116 /*
 117  * Fatal error.  Displays a message similar to error() but also terminates the
 118  * current process.
 119  */
 120 void fatal (const char *msg, ...)
 121 {
 122         va_list  args;
 123
 124         va_start(args, msg);
 125         message(1, "FATAL", msg, args);
 126         va_end(args);
 127
 128         exit(EXIT_FAILURE);
 129 }
 130