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 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 2 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, write to the Free Software
  19    Foundation, Inc., 51 Franklin Street, Fifth Floor,
  20    Boston, MA 02110-1301, USA.  */
  21
  22 #include "server.h"
  23 #include <stdio.h>
  24 #include <string.h>
  25
  26 /* Generally useful subroutines used throughout the program.  */
  27
  28 /* Print the system error message for errno, and also mention STRING
  29    as the file name for which the error was encountered.
  30    Then return to command level.  */
  31
  32 void
  33 perror_with_name (char *string)
  34 {
  35 #ifndef STDC_HEADERS
  36   extern int errno;
  37 #endif
  38   const char *err;
  39   char *combined;
  40
  41   err = strerror (errno);
  42   if (err == NULL)
  43     err = "unknown error";
  44
  45   combined = (char *) alloca (strlen (err) + strlen (string) + 3);
  46   strcpy (combined, string);
  47   strcat (combined, ": ");
  48   strcat (combined, err);
  49
  50   error ("%s.", combined);
  51 }
  52
  53 /* Print an error message and return to command level.
  54    STRING is the error message, used as a fprintf string,
  55    and ARG is passed as an argument to it.  */
  56
  57 void
  58 error (const char *string,...)
  59 {
  60   extern jmp_buf toplevel;
  61   va_list args;
  62   va_start (args, string);
  63   fflush (stdout);
  64   vfprintf (stderr, string, args);
  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 /* VARARGS */
  74 void
  75 fatal (const char *string,...)
  76 {
  77   va_list args;
  78   va_start (args, string);
  79   fprintf (stderr, "gdb: ");
  80   vfprintf (stderr, string, args);
  81   fprintf (stderr, "\n");
  82   va_end (args);
  83   exit (1);
  84 }
  85
  86 /* VARARGS */
  87 void
  88 warning (const char *string,...)
  89 {
  90   va_list args;
  91   va_start (args, string);
  92   fprintf (stderr, "gdb: ");
  93   vfprintf (stderr, string, args);
  94   fprintf (stderr, "\n");
  95   va_end (args);
  96 }