WINGs/error.c

   1 /*
   2  *  Window Maker miscelaneous function library
   3  *
   4  *  Copyright (c) 1997 Alfredo K. Kojima
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19  */
  20
  21
  22 #include "../src/config.h"
  23
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <stdarg.h>
  27 #include <string.h>
  28 #include <errno.h>
  29
  30 extern char *_WINGS_progname;
  31
  32 #define MAXLINE 1024
  33
  34
  35 /*********************************************************************
  36  * Returns the system error message associated with error code 'errnum'
  37  *********************************************************************/
  38 char*
  39 wstrerror(int errnum)
  40 {
  41 #if defined(HAVE_STRERROR)
  42     return strerror(errnum);
  43 #elif !defined(HAVE_STRERROR) && defined(BSD)
  44     extern int errno, sys_nerr;
  45 #  ifndef __DECC
  46     extern char *sys_errlist[];
  47 #  endif
  48     static char buf[] = "Unknown error number 12345678901234567890";
  49
  50     if (errno < sys_nerr)
  51         return sys_errlist[errnum];
  52
  53     sprintf (buf, "Unknown error number %d", errnum);
  54     return buf;
  55 #else /* no strerror() and no sys_errlist[] */
  56     static char buf[] = "Error number 12345678901234567890";
  57
  58     sprintf(buf, "Error number %d", errnum);
  59     return buf;
  60 #endif
  61 }
  62
  63
  64 /**************************************************************************
  65  * Prints a fatal error message with variable arguments and terminates
  66  *
  67  * msg - message to print with optional formatting
  68  * ... - arguments to use on formatting
  69  **************************************************************************/
  70 void
  71 wfatal(const char *msg, ...)
  72 {
  73     va_list args;
  74     char buf[MAXLINE];
  75
  76     va_start(args, msg);
  77
  78     vsprintf(buf, msg, args);
  79     strcat(buf,"\n");
  80     fflush(stdout);
  81     fputs(_WINGS_progname, stderr);
  82     fputs(" fatal error: ",stderr);
  83     fputs(buf, stderr);
  84     fflush(stdout);
  85     fflush(stderr);
  86
  87     va_end(args);
  88 }
  89
  90
  91 /*********************************************************************
  92  * Prints a warning message with variable arguments
  93  *
  94  * msg - message to print with optional formatting
  95  * ... - arguments to use on formatting
  96  *********************************************************************/
  97 void
  98 wwarning(const char *msg, ...)
  99 {
 100     va_list args;
 101     char buf[MAXLINE];
 102
 103     va_start(args, msg);
 104
 105     vsprintf(buf, msg, args);
 106     strcat(buf,"\n");
 107     fflush(stdout);
 108     fputs(_WINGS_progname, stderr);
 109     fputs(" warning: ",stderr);
 110     fputs(buf, stderr);
 111     fflush(stdout);
 112     fflush(stderr);
 113
 114     va_end(args);
 115 }
 116
 117
 118 /*********************************************************************
 119  * Prints a system error message with variable arguments
 120  *
 121  * msg - message to print with optional formatting
 122  * ... - arguments to use on formatting
 123  *********************************************************************/
 124 void
 125 wsyserror(const char *msg, ...)
 126 {
 127     va_list args;
 128     char buf[MAXLINE];
 129     int error=errno;
 130
 131     va_start(args, msg);
 132     vsprintf(buf, msg, args);
 133     fflush(stdout);
 134     fputs(_WINGS_progname, stderr);
 135     fputs(" error: ", stderr);
 136     strcat(buf, ": ");
 137     strcat(buf, wstrerror(error));
 138     strcat(buf,"\n");
 139     fputs(buf, stderr);
 140     fflush(stderr);
 141     fflush(stdout);
 142     va_end(args);
 143 }
 144