From: "Phillip Wood via GitGitGadget" <gitgitgadget@gmail.com>
To: git@vger.kernel.org
Cc: "Johannes Schindelin" <Johannes.Schindelin@gmx.de>,
"Carlo Marcelo Arenas Belón" <carenas@gmail.com>,
"Phillip Wood" <phillip.wood@dunelm.org.uk>,
"Phillip Wood" <phillip.wood@dunelm.org.uk>
Subject: [PATCH 2/3] terminal: set VMIN and VTIME in non-canonical mode
Date: Wed, 16 Feb 2022 10:54:31 +0000 [thread overview]
Message-ID: <02009172e081ab5c4de8e2476c1142f97b41698e.1645008873.git.gitgitgadget@gmail.com> (raw)
In-Reply-To: <pull.1146.git.1645008873.gitgitgadget@gmail.com>
From: Phillip Wood <phillip.wood@dunelm.org.uk>
If VMIN and VTIME are both set to zero then the terminal performs
non-blocking reads which means that read_key_without_echo() returns
EOF if there is no key press pending. This results in the user being
unable to select anything when running "git add -p". Fix this by
explicitly setting VMIN and VTIME when enabling non-canonical mode.
Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
---
compat/terminal.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/compat/terminal.c b/compat/terminal.c
index 20803badd03..d882dfa06e3 100644
--- a/compat/terminal.c
+++ b/compat/terminal.c
@@ -57,6 +57,10 @@ static int disable_bits(tcflag_t bits)
t = old_term;
t.c_lflag &= ~bits;
+ if (bits & ICANON) {
+ t.c_cc[VMIN] = 1;
+ t.c_cc[VTIME] = 0;
+ }
if (!tcsetattr(term_fd, TCSAFLUSH, &t))
return 0;
@@ -159,7 +163,11 @@ static int disable_bits(DWORD bits)
if (bits & ENABLE_LINE_INPUT) {
string_list_append(&stty_restore, "icanon");
- strvec_push(&cp.args, "-icanon");
+ /*
+ * POSIX allows VMIN and VTIME to overlap with VEOF and
+ * VEOL - let's hope that is not the case on windows.
+ */
+ strvec_pushl(&cp.args, "-icanon", "min", "1", "time", "0", NULL);
}
if (bits & ENABLE_ECHO_INPUT) {
--
gitgitgadget
next prev parent reply other threads:[~2022-02-16 10:54 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-16 10:54 [PATCH 0/3] a couple of read_key_without_echo() fixes Phillip Wood via GitGitGadget
2022-02-16 10:54 ` [PATCH 1/3] terminal: pop signal handler when terminal is restored Phillip Wood via GitGitGadget
2022-02-16 10:54 ` Phillip Wood via GitGitGadget [this message]
2022-02-16 21:40 ` [PATCH 2/3] terminal: set VMIN and VTIME in non-canonical mode Junio C Hamano
2022-02-17 10:59 ` Phillip Wood
2022-02-16 10:54 ` [PATCH 3/3] add -p: disable stdin buffering when interactive.singlekey is set Phillip Wood via GitGitGadget
2022-02-16 21:43 ` Junio C Hamano
2022-02-22 18:53 ` [PATCH v2 0/4] a couple of read_key_without_echo() fixes Phillip Wood via GitGitGadget
2022-02-22 18:53 ` [PATCH v2 1/4] terminal: always reset terminal when reading without echo Phillip Wood via GitGitGadget
2022-02-22 18:53 ` [PATCH v2 2/4] terminal: pop signal handler when terminal is restored Phillip Wood via GitGitGadget
2022-02-22 18:53 ` [PATCH v2 3/4] terminal: set VMIN and VTIME in non-canonical mode Phillip Wood via GitGitGadget
2022-02-22 18:53 ` [PATCH v2 4/4] add -p: disable stdin buffering when interactive.singlekey is set Phillip Wood via GitGitGadget
2022-02-23 21:34 ` [PATCH v2 0/4] a couple of read_key_without_echo() fixes Junio C Hamano
2022-02-24 14:30 ` Phillip Wood
2022-03-22 20:18 ` Carlo Arenas
2022-03-23 9:03 ` Junio C Hamano
2022-03-24 13:29 ` Johannes Schindelin
2022-03-28 10:51 ` Phillip Wood
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