gdbsupport/common-inferior.cc

   1 /* Functions to deal with the inferior being executed on GDB or
   2    GDBserver.
   3
   4    Copyright (C) 2019-2020 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 (int argc, char * const *argv)
  32 {
  33   gdb_assert (argc >= 0);
  34
  35   std::string result;
  36
  37   if (startup_with_shell)
  38     {
  39 #ifdef __MINGW32__
  40       /* This holds all the characters considered special to the
  41          Windows shells.  */
  42       static const char special[] = "\"!&*|[]{}<>?`~^=;, \t\n";
  43       static const char quote = '"';
  44 #else
  45       /* This holds all the characters considered special to the
  46          typical Unix shells.  We include `^' because the SunOS
  47          /bin/sh treats it as a synonym for `|'.  */
  48       static const char special[] = "\"!#$&*()\\|[]{}<>?'`~^; \t\n";
  49       static const char quote = '\'';
  50 #endif
  51       for (int i = 0; i < argc; ++i)
  52         {
  53           if (i > 0)
  54             result += ' ';
  55
  56           /* Need to handle empty arguments specially.  */
  57           if (argv[i][0] == '\0')
  58             {
  59               result += quote;
  60               result += quote;
  61             }
  62           else
  63             {
  64 #ifdef __MINGW32__
  65               bool quoted = false;
  66
  67               if (strpbrk (argv[i], special))
  68                 {
  69                   quoted = true;
  70                   result += quote;
  71                 }
  72 #endif
  73               for (char *cp = argv[i]; *cp; ++cp)
  74                 {
  75                   if (*cp == '\n')
  76                     {
  77                       /* A newline cannot be quoted with a backslash (it
  78                          just disappears), only by putting it inside
  79                          quotes.  */
  80                       result += quote;
  81                       result += '\n';
  82                       result += quote;
  83                     }
  84                   else
  85                     {
  86 #ifdef __MINGW32__
  87                       if (*cp == quote)
  88 #else
  89                       if (strchr (special, *cp) != NULL)
  90 #endif
  91                         result += '\\';
  92                       result += *cp;
  93                     }
  94                 }
  95 #ifdef __MINGW32__
  96               if (quoted)
  97                 result += quote;
  98 #endif
  99             }
 100         }
 101     }
 102   else
 103     {
 104       /* In this case we can't handle arguments that contain spaces,
 105          tabs, or newlines -- see breakup_args().  */
 106       for (int i = 0; i < argc; ++i)
 107         {
 108           char *cp = strchr (argv[i], ' ');
 109           if (cp == NULL)
 110             cp = strchr (argv[i], '\t');
 111           if (cp == NULL)
 112             cp = strchr (argv[i], '\n');
 113           if (cp != NULL)
 114             error (_("can't handle command-line "
 115                      "argument containing whitespace"));
 116         }
 117
 118       for (int i = 0; i < argc; ++i)
 119         {
 120           if (i > 0)
 121             result += " ";
 122           result += argv[i];
 123         }
 124     }
 125
 126   return result;
 127 }