gdbsupport/common-inferior.cc

   1 /* Functions to deal with the inferior being executed on GDB or
   2    GDBserver.
   3
   4    Copyright (C) 2019-2021 Free Software Foundation, Inc.
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  20
  21 #include "gdbsupport/common-defs.h"
  22 #include "gdbsupport/common-inferior.h"
  23
  24 /* See common-inferior.h.  */
  25
  26 bool startup_with_shell = true;
  27
  28 /* See common-inferior.h.  */
  29
  30 std::string
  31 construct_inferior_arguments (gdb::array_view<char * const> argv)
  32 {
  33   std::string result;
  34
  35   if (startup_with_shell)
  36     {
  37 #ifdef __MINGW32__
  38       /* This holds all the characters considered special to the
  39          Windows shells.  */
  40       static const char special[] = "\"!&*|[]{}<>?`~^=;, \t\n";
  41       static const char quote = '"';
  42 #else
  43       /* This holds all the characters considered special to the
  44          typical Unix shells.  We include `^' because the SunOS
  45          /bin/sh treats it as a synonym for `|'.  */
  46       static const char special[] = "\"!#$&*()\\|[]{}<>?'`~^; \t\n";
  47       static const char quote = '\'';
  48 #endif
  49       for (int i = 0; i < argv.size (); ++i)
  50         {
  51           if (i > 0)
  52             result += ' ';
  53
  54           /* Need to handle empty arguments specially.  */
  55           if (argv[i][0] == '\0')
  56             {
  57               result += quote;
  58               result += quote;
  59             }
  60           else
  61             {
  62 #ifdef __MINGW32__
  63               bool quoted = false;
  64
  65               if (strpbrk (argv[i], special))
  66                 {
  67                   quoted = true;
  68                   result += quote;
  69                 }
  70 #endif
  71               for (char *cp = argv[i]; *cp; ++cp)
  72                 {
  73                   if (*cp == '\n')
  74                     {
  75                       /* A newline cannot be quoted with a backslash (it
  76                          just disappears), only by putting it inside
  77                          quotes.  */
  78                       result += quote;
  79                       result += '\n';
  80                       result += quote;
  81                     }
  82                   else
  83                     {
  84 #ifdef __MINGW32__
  85                       if (*cp == quote)
  86 #else
  87                       if (strchr (special, *cp) != NULL)
  88 #endif
  89                         result += '\\';
  90                       result += *cp;
  91                     }
  92                 }
  93 #ifdef __MINGW32__
  94               if (quoted)
  95                 result += quote;
  96 #endif
  97             }
  98         }
  99     }
 100   else
 101     {
 102       /* In this case we can't handle arguments that contain spaces,
 103          tabs, or newlines -- see breakup_args().  */
 104       for (char *arg : argv)
 105         {
 106           char *cp = strchr (arg, ' ');
 107           if (cp == NULL)
 108             cp = strchr (arg, '\t');
 109           if (cp == NULL)
 110             cp = strchr (arg, '\n');
 111           if (cp != NULL)
 112             error (_("can't handle command-line "
 113                      "argument containing whitespace"));
 114         }
 115
 116       for (int i = 0; i < argv.size (); ++i)
 117         {
 118           if (i > 0)
 119             result += " ";
 120           result += argv[i];
 121         }
 122     }
 123
 124   return result;
 125 }