add -defaultconf command-line option

CHANGELOG

@@ -101,7 +101,11 @@
     or the DOSBox-X configuration directory, and they
     will automatically appear on the Z drive. If any of
     the files have the same names as the built-in ones,
-    they will replace the built-in files. (Wengier).
+    they will replace the built-in files. For example,
+    you can replace the built-in EDIT.COM and XCOPY.EXE
+    programs (from FreeDOS) with MS-DOS counterparts.
+    For subdirectories please use normal directory
+    mounts (i.e. MOUNT command) instead. (Wengier).
 0.83.5
   - Windows installer now offers the option to upgrade
     the DOSBox-X config file (dosbox-x.conf) to the
@@ -174,7 +178,9 @@
     "auto" (default), DOSBox-X will warn only if at
     least one file handle is still open, or you are
     currently running a guest system. (Wengier)
-  - Add command-line option "-defaultdir" to specify
+  - Added command-line option "-defaultconf" to use the
+    default config settings. (Wengier)
+  - Added command-line option "-defaultdir" to specify
     a directory (instead of the current directory) as
     the working directory. DOSBox-X will look for the
     dosbox-x.conf file in this directory. (Wengier)

include/control.h

@@ -92,6 +92,7 @@ public:
         opt_showcycles = false;
         opt_earlydebug = false;
         opt_break_start = false;
+        opt_defaultconf = false;
         opt_erasemapper = false;
         opt_resetmapper = false;
         opt_startmapper = false;
@@ -134,6 +135,7 @@ public:
     bool opt_erasemapper;
     bool opt_resetmapper;
     bool opt_startmapper;
+    bool opt_defaultconf;
     bool opt_noautoexec;
     bool opt_securemode;
     bool opt_fullscreen;

src/gui/sdlmain.cpp

@@ -6770,6 +6770,7 @@ bool DOSBOX_parse_argv() {
             fprintf(stderr,"  -fullscreen                             Start in fullscreen\n");
             fprintf(stderr,"  -savedir <path>                         Set save path\n");
             fprintf(stderr,"  -defaultdir <path>                      Set the default working path\n");
+            fprintf(stderr,"  -defaultconf                            Use the default config settings\n");
 #if defined(WIN32)
             fprintf(stderr,"  -disable-numlock-check                  Disable NumLock check (Windows version only)\n");
 #endif
@@ -6915,6 +6916,9 @@ bool DOSBOX_parse_argv() {
             if (!control->cmdline->NextOptArgv(tmp)) return false;
             control->config_file_list.push_back(tmp);
         }
+        else if (optname == "defaultconf") {
+            control->opt_defaultconf = true;
+        }
         else if (optname == "editconf") {
             if (!control->cmdline->NextOptArgv(control->opt_editconf)) return false;
         }
@@ -8700,6 +8704,7 @@ int main(int argc, char* argv[]) SDL_MAIN_NOEXCEPT {
             }
         }
 
+    if (!control->opt_defaultconf) {
         /* -- -- if none found, use dosbox-x.conf or dosbox.conf */
         if (!control->configfiles.size()) control->ParseConfigFile("dosbox-x.conf");
         if (!control->configfiles.size()) control->ParseConfigFile("dosbox.conf");
@@ -8812,6 +8817,7 @@ int main(int argc, char* argv[]) SDL_MAIN_NOEXCEPT {
 				}
 			}
 		}
+    }
 
 		MSG_Add("PROGRAM_CONFIG_PROPERTY_ERROR","No such section or property.\n");
 		MSG_Add("PROGRAM_CONFIG_NO_PROPERTY","There is no property %s in section %s.\n");

src/shell/shell_cmds.cpp

@@ -655,7 +655,7 @@ void DOS_Shell::CMD_HELP(char * args){
 		WriteOut("External commands such as \033[33;1mMOUNT\033[0m and \033[33;1mIMGMOUNT\033[0m can be found on the Z: drive.\n");
 	else if (*args&&!show) {
 		std::string argc=std::string(StripArg(args));
-		if (argc!=""&&argc!="CWSDPMI") DoCommand((char *)(argc+(argc=="DOS4GW"||argc=="DOS32A"?"":" /?")).c_str());
+		if (argc!=""&&argc!="CWSDPMI") DoCommand((char *)(argc+(argc=="DOS4GW"||argc=="DOS32A"||argc=="ZIP"||argc=="UNZIP"?"":" /?")).c_str());
 	}
 	if (!*args&&show)
 		WriteOut("Type \033[33;1mHELP command\033[0m or \033[33;1mcommand /?\033[0m for help information for the specified command.\n");

update-dosbox-x-reference-conf

@@ -1,5 +1,5 @@
 #!/bin/bash
-src/dosbox-x -fastlaunch -defaultdir . -c 'config -all -wcp dosbox-x.reference.conf' -c 'exit' || exit 1
+src/dosbox-x -defaultconf -defaultdir . -exit -fastlaunch -c 'config -all -wcp dosbox-x.reference.conf' || exit 1
 
 # Convert to Unix format if needed
 dos2unix dosbox-x.reference.conf