gdb/gdbserver/utils.c

   1 /* General utility routines for the remote server for GDB.
   2    Copyright (C) 1986, 1989, 1993, 1995, 1996, 1997, 1999, 2000, 2002, 2003,
   3    2007, 2008 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #include "server.h"
  21 #include <stdio.h>
  22 #include <string.h>
  23 #include <stdlib.h>
  24 #if HAVE_ERRNO_H
  25 #include <errno.h>
  26 #endif
  27 #if HAVE_MALLOC_H
  28 #include <malloc.h>
  29 #endif
  30
  31 /* Generally useful subroutines used throughout the program.  */
  32
  33 /* Print the system error message for errno, and also mention STRING
  34    as the file name for which the error was encountered.
  35    Then return to command level.  */
  36
  37 void
  38 perror_with_name (char *string)
  39 {
  40   const char *err;
  41   char *combined;
  42
  43   err = strerror (errno);
  44   if (err == NULL)
  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 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 void
  77 fatal (const char *string,...)
  78 {
  79   va_list args;
  80   va_start (args, string);
  81   fprintf (stderr, "gdbserver: ");
  82   vfprintf (stderr, string, args);
  83   fprintf (stderr, "\n");
  84   va_end (args);
  85   exit (1);
  86 }
  87
  88 /* VARARGS */
  89 void
  90 warning (const char *string,...)
  91 {
  92   va_list args;
  93   va_start (args, string);
  94   fprintf (stderr, "gdbserver: ");
  95   vfprintf (stderr, string, args);
  96   fprintf (stderr, "\n");
  97   va_end (args);
  98 }