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., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  19
  20 #include "server.h"
  21 #include <stdio.h>
  22
  23 /* Generally useful subroutines used throughout the program.  */
  24
  25 /* Print the system error message for errno, and also mention STRING
  26    as the file name for which the error was encountered.
  27    Then return to command level.  */
  28
  29 void
  30 perror_with_name (string)
  31      char *string;
  32 {
  33   extern int sys_nerr;
  34   extern char *sys_errlist[];
  35   extern int errno;
  36   char *err;
  37   char *combined;
  38
  39   if (errno < sys_nerr)
  40     err = sys_errlist[errno];
  41   else
  42     err = "unknown error";
  43
  44   combined = (char *) alloca (strlen (err) + strlen (string) + 3);
  45   strcpy (combined, string);
  46   strcat (combined, ": ");
  47   strcat (combined, err);
  48
  49   error ("%s.", combined);
  50 }
  51
  52 /* Print an error message and return to command level.
  53    STRING is the error message, used as a fprintf string,
  54    and ARG is passed as an argument to it.  */
  55
  56 NORETURN void
  57 error (string, arg1, arg2, arg3)
  58      char *string;
  59      int arg1, arg2, arg3;
  60 {
  61   extern jmp_buf toplevel;
  62
  63   fflush (stdout);
  64   fprintf (stderr, string, arg1, arg2, arg3);
  65   fprintf (stderr, "\n");
  66   longjmp(toplevel, 1);
  67 }
  68
  69 /* Print an error message and exit reporting failure.
  70    This is for a error that we cannot continue from.
  71    STRING and ARG are passed to fprintf.  */
  72
  73 void
  74 fatal (string, arg)
  75      char *string;
  76      int arg;
  77 {
  78   fprintf (stderr, "gdb: ");
  79   fprintf (stderr, string, arg);
  80   fprintf (stderr, "\n");
  81   exit (1);
  82 }