text: /*
   * $Id: stdlib_system.c,v 1.10 2006-01-08 12:04:26 obarthel Exp $
   *
   * :ts=4
   *
   * Portable ISO 'C' (1994) runtime library for the Amiga computer
   * Copyright (c) 2002-2015 by Olaf Barthel <obarthel (at) gmx.net>
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   *   - Redistributions of source code must retain the above copyright
   *     notice, this list of conditions and the following disclaimer.
   *
   *   - Neither the name of Olaf Barthel nor the names of contributors
   *     may be used to endorse or promote products derived from this
   *     software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   */
  
  #ifndef _STDLIB_HEADERS_H
  #include "stdlib_headers.h"
  #endif /* _STDLIB_HEADERS_H */
  
  #ifndef _STIO_HEADERS_H
  #include "stdio_headers.h"
  #endif /* _STDIO_HEADERS_H */
  
  /****************************************************************************/
  
  #ifndef _STDLIB_MEMORY_H
  #include "stdlib_memory.h"
  #endif /* _STDLIB_MEMORY_H */
  
  /****************************************************************************/
  
  int
  system(const char * command)
  {
  	char * command_copy = NULL;
  	int result;
  
  	ENTER();
  
  	if(command == NULL)
  		SHOWPOINTER(command);
  	else
  		SHOWSTRING(command);
  
  	if(__check_abort_enabled)
  		__check_abort();
  
  	/* A NULL pointer for the name of the command to execute is
  	 * really a query to find out whether a shell is available.
  	 * We return 1 (TRUE).
  	 */
  	if(command == NULL)
  	{
  		result = 1;
  	}
  	else
  	{
  		static const struct TagItem system_tags[2] =
  		{
  			{ SYS_UserShell,	TRUE },
  			{ TAG_END,			0 }
  		};
  
  		#if defined(UNIX_PATH_SEMANTICS)
  		struct name_translation_info command_nti;
  		#endif /* UNIX_PATH_SEMANTICS */
  
  		#if defined(UNIX_PATH_SEMANTICS)
  		{
  			if(__unix_path_semantics)
  			{
  				char just_the_command_name[MAXPATHLEN+1];
  				BOOL need_quotes = FALSE;
  				char * command_name;
  				size_t command_len;
  				BOOL have_quote;
  				size_t len;
  				size_t i;
  
  				/* We may need to replace the path specified for the command,
  				   so let's figure out first how long the command name,
  				   including everything, really is. */
  				len = strlen(command);
  				command_len = len;
  
  				have_quote = FALSE;
  				for(i = 0 ; i < len ; i++)
  				{
  					if(command[i] == '\"')
  					{
  						need_quotes = TRUE;
  						have_quote ^= TRUE;
  					}
  
  					if((command[i] == ' ' || command[i] == '\t') && NOT have_quote)
  					{
  						command_len = i;
  						break;
  					}
  				}
  
  				/* This may be too long for proper translation... */
  				if(command_len > MAXPATHLEN)
  				{
  					__set_errno(ENAMETOOLONG);
  
  					result = ERROR;
  					goto out;
  				}
  
  				/* Grab the command name itself, then have it translated. */
  				command_name = just_the_command_name;
  				for(i = 0 ; i < command_len ; i++)
  				{
  					if(command[i] != '\"')
  						(*command_name++) = command[i];
  				}
  
  				(*command_name) = '\0';
  
  				command_name = just_the_command_name;
  
  				/* Don't try to translate the name of the command unless it has
  				   path name separator characters in it. */
  				if(strchr(command_name,'/') != NULL && __translate_unix_to_amiga_path_name((const char **)&command_name,&command_nti) != 0)
  				{
  					result = ERROR;
  					goto out;
  				}
  
  				/* Now put it all together again */
  				command_copy = malloc(1 + strlen(command_name) + 1 + strlen(&command[command_len]) + 1);
  				if(command_copy == NULL)
  				{
  					__set_errno(ENOMEM);
  
  					result = ERROR;
  					goto out;
  				}
  
  				if(need_quotes)
  				{
  					command_copy[0] = '\"';
  
  					strcpy(&command_copy[1],command_name);
  					strcat(command_copy,"\"");
  				}
  				else
  				{
  					strcpy(command_copy,command_name);
  				}
  
  				strcat(command_copy,&command[command_len]);
  
  				command = command_copy;
  			}
  		}
  		#endif /* UNIX_PATH_SEMANTICS */
  
  		SHOWSTRING(command);
  
  		PROFILE_OFF();
  
  		/* Push all currently buffered output towards the file handles,
  		   in case the program to be launched writes to these files
  		   or the console, too. */
  		__flush_all_files(-1);
  
  		result = SystemTagList((STRPTR)command, (struct TagItem *)system_tags);
  
  		PROFILE_ON();
  	}
  
   out:
  
  	if(command_copy != NULL)
  		free(command_copy);
  
  	RETURN(result);
  	return(result);
  }
  