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From: "Johannes Schindelin via GitGitGadget" <gitgitgadget@gmail.com>
To: git@vger.kernel.org
Cc: Johannes Schindelin <johannes.schindelin@gmx.de>,
	Johannes Schindelin <johannes.schindelin@gmx.de>
Subject: [PATCH v3 05/10] terminal: accommodate Git for Windows' default terminal
Date: Mon, 13 Jan 2020 08:29:26 +0000	[thread overview]
Message-ID: <233f23791caaca5dee6b227520560f53977c8ea7.1578904171.git.gitgitgadget@gmail.com> (raw)
In-Reply-To: <pull.175.v3.git.1578904171.gitgitgadget@gmail.com>

From: Johannes Schindelin <johannes.schindelin@gmx.de>

Git for Windows' Git Bash runs in MinTTY by default, which does not have
a Win32 Console instance, but uses MSYS2 pseudo terminals instead.

This is a problem, as Git for Windows does not want to use the MSYS2
emulation layer for Git itself, and therefore has no direct way to
interact with that pseudo terminal.

As a workaround, use the `stty` utility (which is included in Git for
Windows, and which *is* an MSYS2 program, so it knows how to deal with
the pseudo terminal).

Note: If Git runs in a regular CMD or PowerShell window, there *is* a
regular Win32 Console to work with. This is not a problem for the MSYS2
`stty`: it copes with this scenario just fine.

Also note that we introduce support for more bits than would be
necessary for a mere `disable_echo()` here, in preparation for the
upcoming `enable_non_canonical()` function.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
---
 compat/terminal.c | 50 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)

diff --git a/compat/terminal.c b/compat/terminal.c
index 1fb40b3a0a..16e9949da1 100644
--- a/compat/terminal.c
+++ b/compat/terminal.c
@@ -2,6 +2,8 @@
 #include "compat/terminal.h"
 #include "sigchain.h"
 #include "strbuf.h"
+#include "run-command.h"
+#include "string-list.h"
 
 #if defined(HAVE_DEV_TTY) || defined(GIT_WINDOWS_NATIVE)
 
@@ -64,11 +66,28 @@ static int disable_echo(void)
 #define OUTPUT_PATH "CONOUT$"
 #define FORCE_TEXT "t"
 
+static int use_stty = 1;
+static struct string_list stty_restore = STRING_LIST_INIT_DUP;
 static HANDLE hconin = INVALID_HANDLE_VALUE;
 static DWORD cmode;
 
 static void restore_term(void)
 {
+	if (use_stty) {
+		int i;
+		struct child_process cp = CHILD_PROCESS_INIT;
+
+		if (stty_restore.nr == 0)
+			return;
+
+		argv_array_push(&cp.args, "stty");
+		for (i = 0; i < stty_restore.nr; i++)
+			argv_array_push(&cp.args, stty_restore.items[i].string);
+		run_command(&cp);
+		string_list_clear(&stty_restore, 0);
+		return;
+	}
+
 	if (hconin == INVALID_HANDLE_VALUE)
 		return;
 
@@ -79,6 +98,37 @@ static void restore_term(void)
 
 static int disable_bits(DWORD bits)
 {
+	if (use_stty) {
+		struct child_process cp = CHILD_PROCESS_INIT;
+
+		argv_array_push(&cp.args, "stty");
+
+		if (bits & ENABLE_LINE_INPUT) {
+			string_list_append(&stty_restore, "icanon");
+			argv_array_push(&cp.args, "-icanon");
+		}
+
+		if (bits & ENABLE_ECHO_INPUT) {
+			string_list_append(&stty_restore, "echo");
+			argv_array_push(&cp.args, "-echo");
+		}
+
+		if (bits & ENABLE_PROCESSED_INPUT) {
+			string_list_append(&stty_restore, "-ignbrk");
+			string_list_append(&stty_restore, "intr");
+			string_list_append(&stty_restore, "^c");
+			argv_array_push(&cp.args, "ignbrk");
+			argv_array_push(&cp.args, "intr");
+			argv_array_push(&cp.args, "");
+		}
+
+		if (run_command(&cp) == 0)
+			return 0;
+
+		/* `stty` could not be executed; access the Console directly */
+		use_stty = 0;
+	}
+
 	hconin = CreateFile("CONIN$", GENERIC_READ | GENERIC_WRITE,
 	    FILE_SHARE_READ, NULL, OPEN_EXISTING,
 	    FILE_ATTRIBUTE_NORMAL, NULL);
-- 
gitgitgadget


  parent reply	other threads:[~2020-01-13  8:29 UTC|newest]

Thread overview: 63+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-21 22:41 [PATCH 0/9] built-in add -p: add support for the same config settings as the Perl version Johannes Schindelin via GitGitGadget
2019-12-21 22:41 ` [PATCH 1/9] built-in add -p: support interactive.diffFilter Johannes Schindelin via GitGitGadget
2019-12-21 22:41 ` [PATCH 2/9] built-in add -p: handle diff.algorithm Johannes Schindelin via GitGitGadget
2019-12-21 22:41 ` [PATCH 3/9] terminal: make the code of disable_echo() reusable Johannes Schindelin via GitGitGadget
2019-12-21 22:41 ` [PATCH 4/9] terminal: accommodate Git for Windows' default terminal Johannes Schindelin via GitGitGadget
2019-12-21 22:41 ` [PATCH 5/9] terminal: add a new function to read a single keystroke Johannes Schindelin via GitGitGadget
2019-12-21 22:41 ` [PATCH 6/9] built-in add -p: respect the `interactive.singlekey` config setting Johannes Schindelin via GitGitGadget
2019-12-21 22:41 ` [PATCH 7/9] built-in add -p: handle Escape sequences in interactive.singlekey mode Johannes Schindelin via GitGitGadget
2019-12-21 22:41 ` [PATCH 8/9] built-in add -p: handle Escape sequences more efficiently Johannes Schindelin via GitGitGadget
2019-12-21 22:42 ` [PATCH 9/9] ci: include the built-in `git add -i` in the `linux-gcc` job Johannes Schindelin via GitGitGadget
2019-12-21 22:53   ` SZEDER Gábor
2019-12-25 11:56     ` Johannes Schindelin
2019-12-22  0:11   ` Junio C Hamano
2019-12-25 11:57     ` Johannes Schindelin
2019-12-24 18:23 ` [PATCH 0/9] built-in add -p: add support for the same config settings as the Perl version Junio C Hamano
2019-12-24 18:39   ` Junio C Hamano
2019-12-25  8:46     ` Simon Ruderich
2019-12-25 12:09     ` Johannes Schindelin
2019-12-25 12:02   ` Johannes Schindelin
2019-12-25 11:56 ` [PATCH v2 " Johannes Schindelin via GitGitGadget
2019-12-25 11:56   ` [PATCH v2 1/9] built-in add -p: support interactive.diffFilter Johannes Schindelin via GitGitGadget
2020-01-07 22:57     ` SZEDER Gábor
2020-01-13  6:47       ` Johannes Schindelin
2019-12-25 11:56   ` [PATCH v2 2/9] built-in add -p: handle diff.algorithm Johannes Schindelin via GitGitGadget
2019-12-25 11:56   ` [PATCH v2 3/9] terminal: make the code of disable_echo() reusable Johannes Schindelin via GitGitGadget
2019-12-25 11:56   ` [PATCH v2 4/9] terminal: accommodate Git for Windows' default terminal Johannes Schindelin via GitGitGadget
2019-12-25 11:56   ` [PATCH v2 5/9] terminal: add a new function to read a single keystroke Johannes Schindelin via GitGitGadget
2019-12-25 11:56   ` [PATCH v2 6/9] built-in add -p: respect the `interactive.singlekey` config setting Johannes Schindelin via GitGitGadget
2019-12-25 11:56   ` [PATCH v2 7/9] built-in add -p: handle Escape sequences in interactive.singlekey mode Johannes Schindelin via GitGitGadget
2019-12-25 11:56   ` [PATCH v2 8/9] built-in add -p: handle Escape sequences more efficiently Johannes Schindelin via GitGitGadget
2019-12-25 11:57   ` [PATCH v2 9/9] ci: include the built-in `git add -i` in the `linux-gcc` job Johannes Schindelin via GitGitGadget
2019-12-26 20:48     ` Derrick Stolee
2020-01-01 22:10       ` Johannes Schindelin
2019-12-26 20:45   ` [PATCH v2 0/9] built-in add -p: add support for the same config settings as the Perl version Junio C Hamano
2020-01-13  8:29   ` [PATCH v3 00/10] " Johannes Schindelin via GitGitGadget
2020-01-13  8:29     ` [PATCH v3 01/10] built-in add -i/-p: treat SIGPIPE as EOF Johannes Schindelin via GitGitGadget
2020-01-13 17:04       ` SZEDER Gábor
2020-01-13 18:33         ` Jeff King
2020-01-15 18:32           ` Junio C Hamano
2020-01-15 19:03             ` Jeff King
2020-01-14 12:47         ` Johannes Schindelin
2020-01-17 14:32         ` SZEDER Gábor
2020-01-17 18:58           ` Jeff King
2020-01-13  8:29     ` [PATCH v3 02/10] built-in add -p: support interactive.diffFilter Johannes Schindelin via GitGitGadget
2020-01-13  8:29     ` [PATCH v3 03/10] built-in add -p: handle diff.algorithm Johannes Schindelin via GitGitGadget
2020-01-13  8:29     ` [PATCH v3 04/10] terminal: make the code of disable_echo() reusable Johannes Schindelin via GitGitGadget
2020-01-13  8:29     ` Johannes Schindelin via GitGitGadget [this message]
2020-01-13  8:29     ` [PATCH v3 06/10] terminal: add a new function to read a single keystroke Johannes Schindelin via GitGitGadget
2020-01-13  8:29     ` [PATCH v3 07/10] built-in add -p: respect the `interactive.singlekey` config setting Johannes Schindelin via GitGitGadget
2020-01-13  8:29     ` [PATCH v3 08/10] built-in add -p: handle Escape sequences in interactive.singlekey mode Johannes Schindelin via GitGitGadget
2020-01-13  8:29     ` [PATCH v3 09/10] built-in add -p: handle Escape sequences more efficiently Johannes Schindelin via GitGitGadget
2020-01-13  8:29     ` [PATCH v3 10/10] ci: include the built-in `git add -i` in the `linux-gcc` job Johannes Schindelin via GitGitGadget
2020-01-14 18:43     ` [PATCH v4 00/10] built-in add -p: add support for the same config settings as the Perl version Johannes Schindelin via GitGitGadget
2020-01-14 18:43       ` [PATCH v4 01/10] t3701: adjust difffilter test Johannes Schindelin via GitGitGadget
2020-01-14 18:43       ` [PATCH v4 02/10] built-in add -p: support interactive.diffFilter Johannes Schindelin via GitGitGadget
2020-01-14 18:43       ` [PATCH v4 03/10] built-in add -p: handle diff.algorithm Johannes Schindelin via GitGitGadget
2020-01-14 18:43       ` [PATCH v4 04/10] terminal: make the code of disable_echo() reusable Johannes Schindelin via GitGitGadget
2020-01-14 18:43       ` [PATCH v4 05/10] terminal: accommodate Git for Windows' default terminal Johannes Schindelin via GitGitGadget
2020-01-14 18:43       ` [PATCH v4 06/10] terminal: add a new function to read a single keystroke Johannes Schindelin via GitGitGadget
2020-01-14 18:43       ` [PATCH v4 07/10] built-in add -p: respect the `interactive.singlekey` config setting Johannes Schindelin via GitGitGadget
2020-01-14 18:43       ` [PATCH v4 08/10] built-in add -p: handle Escape sequences in interactive.singlekey mode Johannes Schindelin via GitGitGadget
2020-01-14 18:43       ` [PATCH v4 09/10] built-in add -p: handle Escape sequences more efficiently Johannes Schindelin via GitGitGadget
2020-01-14 18:43       ` [PATCH v4 10/10] ci: include the built-in `git add -i` in the `linux-gcc` job Johannes Schindelin via GitGitGadget

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