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 (char *string)
  33 {
  34 #ifndef STDC_HEADERS
  35   extern int sys_nerr;
  36   extern char *sys_errlist[];
  37   extern int errno;
  38 #endif
  39   const char *err;
  40   char *combined;
  41
  42   if (errno < sys_nerr)
  43     err = sys_errlist[errno];
  44   else
  45     err = "unknown error";
  46
  47   combined = (char *) alloca (strlen (err) + strlen (string) + 3);
  48   strcpy (combined, string);
  49   strcat (combined, ": ");
  50   strcat (combined, err);
  51
  52   error ("%s.", combined);
  53 }
  54
  55 /* Print an error message and return to command level.
  56    STRING is the error message, used as a fprintf string,
  57    and ARG is passed as an argument to it.  */
  58
  59 NORETURN void
  60 error (const char *string,...)
  61 {
  62   extern jmp_buf toplevel;
  63   va_list args;
  64   va_start (args, string);
  65   fflush (stdout);
  66   vfprintf (stderr, string, args);
  67   fprintf (stderr, "\n");
  68   longjmp (toplevel, 1);
  69 }
  70
  71 /* Print an error message and exit reporting failure.
  72    This is for a error that we cannot continue from.
  73    STRING and ARG are passed to fprintf.  */
  74
  75 /* VARARGS */
  76 NORETURN void
  77 fatal (char *string,...)
  78 {
  79   va_list args;
  80   va_start (args, string);
  81   fprintf (stderr, "gdb: ");
  82   vfprintf (stderr, string, args);
  83   fprintf (stderr, "\n");
  84   va_end (args);
  85   exit (1);
  86 }