From nobody Thu Dec 25 03:24:16 2025 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 356463D96E; Mon, 22 Jan 2024 11:04:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705921477; cv=none; b=e7lnSA9XuUdHReuG0W/a3Xbat/o0rRClbanTIoowOmcz7SOqJvev6BSR2eCmOrev7A6nfTM3loD9TXrzoHEvpmByP3cFjtVVolVzAnBQ5g0GUO5YNi4YBKUU0ZD9zbXhjOPd+c3G581+e+EgvBrHf1cbDElRGcqZrX4jRqBMTwU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705921477; c=relaxed/simple; bh=Uu87mm2M+m6Hd05cPkak7Z4o+qrJBfuAGdCq0mnOoYs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=hAqeoKei4QE8wg2Nfo18sUfE9F2owOSpiYm2ftESZ4mU+0MEFRUoRMsgAqjjICe7mPIGsw1Dt8rEUXqgiJF476t6EWdj32n9HTEEX6HMIPu89Lrl7pIym3JG6xb9LomBoonIBciVf0eS575hgpFmUdGMiieInJcS4WTUhzaPKBo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=R+XxE8t7; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="R+XxE8t7" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 65632C433A6; Mon, 22 Jan 2024 11:04:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1705921476; bh=Uu87mm2M+m6Hd05cPkak7Z4o+qrJBfuAGdCq0mnOoYs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=R+XxE8t7wIgEddHDk1cx4Bp2mRpRzfSHaNtNx+0Hal5oNmLitIwbOv8KaeRpoH7eH oQvZKHg6dBGBo4W0vlS831m414hqrAlVmk0VNXKum81j9X4V4Mk1c7iRAvCv3+o6HE FrYCMyQ58RU+YnFp5TfEtyzWLT4ie4GHo553L6ILXVtFns3+VXYcj2k3yBU6aoIEsz 99rgM/a1zBMlKz9InNyrgAEuWMmKWz2Ej4/KCiL+Fd3n2XVaJrBJDJZEn7n0akNckh hB2pNKgeI3MjSIysgGAvFGF7uTwXar8JyWbR3AJ2zNpY7MpRcsD0dJsWISdaVtivP2 306lO2T8a5R7A== From: "Jiri Slaby (SUSE)" To: gregkh@linuxfoundation.org Cc: linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org, "Jiri Slaby (SUSE)" Subject: [PATCH v2 17/47] tty: vt: define an enum for ascii characters Date: Mon, 22 Jan 2024 12:03:31 +0100 Message-ID: <20240122110401.7289-18-jirislaby@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240122110401.7289-1-jirislaby@kernel.org> References: <20240122110401.7289-1-jirislaby@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" I didn't find definitions for ascii in the kernel yet, so define it for non-printable characters used here. Note we use ' ' instead of 32 on one line too. Signed-off-by: Jiri Slaby (SUSE) --- drivers/tty/vt/vt.c | 62 ++++++++++++++++++++++++++++++++------------- 1 file changed, 44 insertions(+), 18 deletions(-) diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index 8d868aa33733..51a2787415db 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -2143,6 +2143,28 @@ static bool ansi_control_string(unsigned int state) return false; } =20 +enum { + ASCII_NULL =3D 0, + ASCII_BELL =3D 7, + ASCII_BACKSPACE =3D 8, + ASCII_IGNORE_FIRST =3D ASCII_BACKSPACE, + ASCII_HTAB =3D 9, + ASCII_LINEFEED =3D 10, + ASCII_VTAB =3D 11, + ASCII_FORMFEED =3D 12, + ASCII_CAR_RET =3D 13, + ASCII_IGNORE_LAST =3D ASCII_CAR_RET, + ASCII_SHIFTOUT =3D 14, + ASCII_SHIFTIN =3D 15, + ASCII_CANCEL =3D 24, + ASCII_SUBSTITUTE =3D 26, + ASCII_ESCAPE =3D 27, + ASCII_CSI_IGNORE_FIRST =3D ' ', /* 0x2x, 0x3a and 0x3c - 0x3f */ + ASCII_CSI_IGNORE_LAST =3D '?', + ASCII_DEL =3D 127, + ASCII_EXT_CSI =3D 128 + ASCII_ESCAPE, +}; + /* console_lock is held */ static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c) { @@ -2150,21 +2172,22 @@ static void do_con_trol(struct tty_struct *tty, str= uct vc_data *vc, int c) * Control characters can be used in the _middle_ * of an escape sequence, aside from ANSI control strings. */ - if (ansi_control_string(vc->vc_state) && c >=3D 8 && c <=3D 13) + if (ansi_control_string(vc->vc_state) && c >=3D ASCII_IGNORE_FIRST && + c <=3D ASCII_IGNORE_LAST) return; switch (c) { - case 0: + case ASCII_NULL: return; - case 7: + case ASCII_BELL: if (ansi_control_string(vc->vc_state)) vc->vc_state =3D ESnormal; else if (vc->vc_bell_duration) kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration); return; - case 8: + case ASCII_BACKSPACE: bs(vc); return; - case 9: + case ASCII_HTAB: vc->vc_pos -=3D (vc->state.x << 1); =20 vc->state.x =3D find_next_bit(vc->vc_tab_stop, @@ -2176,34 +2199,37 @@ static void do_con_trol(struct tty_struct *tty, str= uct vc_data *vc, int c) vc->vc_pos +=3D (vc->state.x << 1); notify_write(vc, '\t'); return; - case 10: case 11: case 12: + case ASCII_LINEFEED: + case ASCII_VTAB: + case ASCII_FORMFEED: lf(vc); if (!is_kbd(vc, lnm)) return; fallthrough; - case 13: + case ASCII_CAR_RET: cr(vc); return; - case 14: + case ASCII_SHIFTOUT: vc->state.charset =3D 1; vc->vc_translate =3D set_translate(vc->state.Gx_charset[1], vc); vc->vc_disp_ctrl =3D 1; return; - case 15: + case ASCII_SHIFTIN: vc->state.charset =3D 0; vc->vc_translate =3D set_translate(vc->state.Gx_charset[0], vc); vc->vc_disp_ctrl =3D 0; return; - case 24: case 26: + case ASCII_CANCEL: + case ASCII_SUBSTITUTE: vc->vc_state =3D ESnormal; return; - case 27: + case ASCII_ESCAPE: vc->vc_state =3D ESesc; return; - case 127: + case ASCII_DEL: del(vc); return; - case 128+27: + case ASCII_EXT_CSI: vc->vc_state =3D ESsquare; return; } @@ -2338,7 +2364,7 @@ static void do_con_trol(struct tty_struct *tty, struc= t vc_data *vc, int c) vc->vc_par[vc->vc_npar] +=3D c - '0'; return; } - if (c >=3D 0x20 && c <=3D 0x3f) { /* 0x2x, 0x3a and 0x3c - 0x3f */ + if (c >=3D ASCII_CSI_IGNORE_FIRST && c <=3D ASCII_CSI_IGNORE_LAST) { vc->vc_state =3D EScsiignore; return; } @@ -2500,7 +2526,7 @@ static void do_con_trol(struct tty_struct *tty, struc= t vc_data *vc, int c) } return; case EScsiignore: - if (c >=3D 0x20 && c <=3D 0x3f) + if (c >=3D ASCII_CSI_IGNORE_FIRST && c <=3D ASCII_CSI_IGNORE_LAST) return; vc->vc_state =3D ESnormal; return; @@ -2761,17 +2787,17 @@ static bool vc_is_control(struct vc_data *vc, int t= c, int c) * useless without them; to display an arbitrary font position use the * direct-to-font zone in UTF-8 mode. */ - if (c < 32) { + if (c < ' ') { if (vc->vc_disp_ctrl) return CTRL_ALWAYS & BIT(c); else return vc->vc_utf || (CTRL_ACTION & BIT(c)); } =20 - if (c =3D=3D 127 && !vc->vc_disp_ctrl) + if (c =3D=3D ASCII_DEL && !vc->vc_disp_ctrl) return true; =20 - if (c =3D=3D 128 + 27) + if (c =3D=3D ASCII_EXT_CSI) return true; =20 return false; --=20 2.43.0