gdb/gdbserver/utils.c

   1 /* General utility routines for the remote server for GDB.
   2    Copyright (C) 1986, 1989, 1993 Free Software Foundation, Inc.
   3
   4    This file is part of GDB.
   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., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #include "server.h"
  22 #include <stdio.h>
  23 #include <string.h>
  24
  25 /* Generally useful subroutines used throughout the program.  */
  26
  27 /* Print the system error message for errno, and also mention STRING
  28    as the file name for which the error was encountered.
  29    Then return to command level.  */
  30
  31 void
  32 perror_with_name (string)
  33      char *string;
  34 {
  35 #ifndef STDC_HEADERS
  36   extern int sys_nerr;
  37   extern char *sys_errlist[];
  38   extern int errno;
  39 #endif
  40   const char *err;
  41   char *combined;
  42
  43   if (errno < sys_nerr)
  44     err = sys_errlist[errno];
  45   else
  46     err = "unknown error";
  47
  48   combined = (char *) alloca (strlen (err) + strlen (string) + 3);
  49   strcpy (combined, string);
  50   strcat (combined, ": ");
  51   strcat (combined, err);
  52
  53   error ("%s.", combined);
  54 }
  55
  56 /* Print an error message and return to command level.
  57    STRING is the error message, used as a fprintf string,
  58    and ARG is passed as an argument to it.  */
  59
  60 #ifdef ANSI_PROTOTYPES
  61 NORETURN void
  62 error (const char *string,...)
  63 #else
  64 void
  65 error (va_alist)
  66      va_dcl
  67 #endif
  68 {
  69   extern jmp_buf toplevel;
  70   va_list args;
  71 #ifdef ANSI_PROTOTYPES
  72   va_start (args, string);
  73 #else
  74   va_start (args);
  75 #endif
  76   fflush (stdout);
  77 #ifdef ANSI_PROTOTYPES
  78   vfprintf (stderr, string, args);
  79 #else
  80   {
  81     char *string1;
  82
  83     string1 = va_arg (args, char *);
  84     vfprintf (stderr, string1, args);
  85   }
  86 #endif
  87   fprintf (stderr, "\n");
  88   longjmp (toplevel, 1);
  89 }
  90
  91 /* Print an error message and exit reporting failure.
  92    This is for a error that we cannot continue from.
  93    STRING and ARG are passed to fprintf.  */
  94
  95 /* VARARGS */
  96 NORETURN void
  97 #ifdef ANSI_PROTOTYPES
  98 fatal (char *string,...)
  99 #else
 100 fatal (va_alist)
 101      va_dcl
 102 #endif
 103 {
 104   va_list args;
 105 #ifdef ANSI_PROTOTYPES
 106   va_start (args, string);
 107 #else
 108   char *string;
 109   va_start (args);
 110   string = va_arg (args, char *);
 111 #endif
 112   fprintf (stderr, "gdb: ");
 113   vfprintf (stderr, string, args);
 114   fprintf (stderr, "\n");
 115   va_end (args);
 116   exit (1);
 117 }