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common-inferior.cc revision 1.1.1.1 
      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 (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 }
    126