settings -P/--pcon/ConPTY to enable/disable ConPTY support (mintty/ws…

…ltty#271)

docs/mintty.1

@@ -272,6 +272,10 @@ options AppName and AppLaunchCmd.
 \fB--nopin\fP
 Prevent pinning of the mintty window to the Windows taskbar.
 
+.TP
+\fB-P\fP, \fB--pcon\fP [\fBon\fP|\fBoff\fP]
+Enforce enabling or disabling of ConPTY support.
+
 .TP
 \fB--wsl\fP (preferred option: \fB--WSL\fP, see below)
 Adjust to WSL (the Windows Subsystem for Linux, or Bash/Ubuntu on Windows):
@@ -2459,6 +2463,12 @@ a specific AppID cannot be removed or even modified again with normal means.
 For this reason, it is advisable to use temporary AppIDs for testing 
 (like MyMintty.1).
 
+.TP
+\fBControl ConPTY support\fP (ConPTY=)
+Setting this on or off enforces enabled or disabled support of pseudo console 
+for native Windows programs. The default is to leave it up to the default 
+of the system environment (cygwin or MSYS2).
+
 .TP
 \fBWord selection characters\fP (WordChars=)
 By default, this string setting is empty, in which case double-click word

src/config.c

@@ -206,6 +206,7 @@ const config default_cfg = {
   .user_commands_path = W("/bin:%s"),
   .session_commands = W(""),
   .task_commands = W(""),
+  .conpty_support = -1,
   .menu_mouse = "b",
   .menu_ctrlmouse = "e|ls",
   .menu_altmouse = "ls",
@@ -494,6 +495,7 @@ options[] = {
   {"UserCommandsPath", OPT_WSTRING, offcfg(user_commands_path)},
   {"SessionCommands", OPT_WSTRING | OPT_KEEPCR, offcfg(session_commands)},
   {"TaskCommands", OPT_WSTRING | OPT_KEEPCR, offcfg(task_commands)},
+  {"ConPTY", OPT_BOOL, offcfg(conpty_support)},
   {"MenuMouse", OPT_STRING, offcfg(menu_mouse)},
   {"MenuCtrlMouse", OPT_STRING, offcfg(menu_ctrlmouse)},
   {"MenuMouse5", OPT_STRING, offcfg(menu_altmouse)},

src/config.h

@@ -201,6 +201,7 @@ typedef struct {
   wstring user_commands_path;
   wstring session_commands;
   wstring task_commands;
+  int conpty_support;
   string menu_mouse;
   string menu_ctrlmouse;
   string menu_altmouse;

src/winmain.c

@@ -4487,7 +4487,7 @@ static char help[] =
   "See manual page for further command line options and configuration.\n"
 );
 
-static const char short_opts[] = "+:c:C:eh:i:l:o:p:s:t:T:B:R:uw:HVdD~";
+static const char short_opts[] = "+:c:C:eh:i:l:o:p:s:t:T:B:R:uw:HVdD~P:";
 
 enum {
   OPT_FG       = 0x80,
@@ -4533,6 +4533,7 @@ opts[] = {
   {"WSL",        optional_argument, 0, ''},  // short option not enabled
   {"WSLmode",    optional_argument, 0, ''},  // short option not enabled
 #endif
+  {"pcon",       required_argument, 0, 'P'},
   {"rootfs",     required_argument, 0, ''},  // short option not enabled
   {"dir~",       no_argument,       0, '~'},
   {"help",       no_argument,       0, 'H'},
@@ -4970,6 +4971,8 @@ main(int argc, char *argv[])
         dup(tfd);
         close(tfd);
       }
+      when 'P':
+        set_arg_option("ConPTY", optarg);
     }
   }
 
@@ -5704,6 +5707,24 @@ static int dynfonts = 0;
   if (*cfg.background == '%')
     scale_to_image_ratio();
 
+  // Adjust ConPTY support if requested
+  if (cfg.conpty_support != (uchar)-1) {
+    char * env = 0;
+#ifdef __MSYS__
+    env = "MSYS";
+#else
+#ifdef __CYGWIN__
+    env = "CYGWIN";
+#endif
+#endif
+    if (env) {
+      char * val = cfg.conpty_support ? "enable_pcon" : "disable_pcon";
+      val = asform("%s %s", getenv(env) ?: "", val);
+      //printf("%d %s=%s\n", cfg.conpty_support, env, val);
+      setenv(env, val, true);
+    }
+  }
+
   // Create child process.
   child_create(
     argv,

wiki/Changelog.md

@@ -9,6 +9,7 @@ Keyboard handling
   * Applying modifyOtherKeys mode 2 more consistently to special keys (~~#1082).
 
 Configuration
+  * New settings -P/--pcon/ConPTY to enable/disable ConPTY support (mintty/wsltty#271).
   * Support for theme file conversion on filename drag-and-drop (#1079).
   * Support for theme file conversion on "file:" URL drag-and-drop (~#1079).
   * Support for ".json" theme file conversion (~~#1079).