From ccf88e34a3b280d28f7a4499335e274a5766c725 Mon Sep 17 00:00:00 2001 From: Xiang Xiao Date: Sat, 25 Jul 2026 00:08:54 +0800 Subject: [PATCH] libc: add paths.h, sys/ttydefaults.h and termios IUTF8 Add commonly required POSIX/BSD interfaces that portable command-line utilities expect but that were missing from the C library: - include/paths.h: _PATH_DEFPATH and the other standard default paths. - include/sys/ttydefaults.h: BSD default control-character and terminal flag definitions. - include/termios.h: define the IUTF8 input flag. Signed-off-by: Xiang Xiao --- include/paths.h | 73 +++++++++++++++++++++++++++ include/sys/ttydefaults.h | 102 ++++++++++++++++++++++++++++++++++++++ include/termios.h | 1 + 3 files changed, 176 insertions(+) create mode 100644 include/paths.h create mode 100644 include/sys/ttydefaults.h diff --git a/include/paths.h b/include/paths.h new file mode 100644 index 0000000000000..4db48cd62e7a3 --- /dev/null +++ b/include/paths.h @@ -0,0 +1,73 @@ +/**************************************************************************** + * include/paths.h + * + * SPDX-License-Identifier: Apache-2.0 + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. The + * ASF licenses this file to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance with the + * License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT + * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the + * License for the specific language governing permissions and limitations + * under the License. + * + ****************************************************************************/ + +#ifndef __INCLUDE_PATHS_H +#define __INCLUDE_PATHS_H + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/* Default search path. */ + +#define _PATH_DEFPATH "/usr/bin:/bin" + +/* All standard utilities path. */ + +#define _PATH_STDPATH "/usr/bin:/bin:/usr/sbin:/sbin" + +#define _PATH_BSHELL "/bin/sh" +#define _PATH_CONSOLE "/dev/console" +#define _PATH_CSHELL "/bin/csh" +#define _PATH_DEVDB "/var/run/dev.db" +#define _PATH_DEVNULL "/dev/null" +#define _PATH_DRUM "/dev/drum" +#define _PATH_GSHADOW "/etc/gshadow" +#define _PATH_KLOG "/proc/kmsg" +#define _PATH_KMEM "/dev/kmem" +#define _PATH_LASTLOG "/var/log/lastlog" +#define _PATH_MAILDIR "/var/mail" +#define _PATH_MAN "/usr/share/man" +#define _PATH_MEM "/dev/mem" +#define _PATH_MNTTAB "/etc/fstab" +#define _PATH_MOUNTED "/etc/mtab" +#define _PATH_NOLOGIN "/etc/nologin" +#define _PATH_PRESERVE "/var/lib" +#define _PATH_RWHODIR "/var/spool/rwho" +#define _PATH_SENDMAIL "/usr/sbin/sendmail" +#define _PATH_SHADOW "/etc/shadow" +#define _PATH_SHELLS "/etc/shells" +#define _PATH_TTY "/dev/tty" +#define _PATH_UNIX "/boot/vmlinux" +#define _PATH_UTMP "/var/run/utmp" +#define _PATH_VI "/usr/bin/vi" +#define _PATH_WTMP "/var/log/wtmp" + +/* Provide trailing slash, since mostly used for building pathnames. */ + +#define _PATH_DEV "/dev/" +#define _PATH_TMP "/tmp/" +#define _PATH_VARDB "/var/lib/misc/" +#define _PATH_VARRUN "/var/run/" +#define _PATH_VARTMP "/var/tmp/" + +#endif /* __INCLUDE_PATHS_H */ diff --git a/include/sys/ttydefaults.h b/include/sys/ttydefaults.h new file mode 100644 index 0000000000000..0593188a343f0 --- /dev/null +++ b/include/sys/ttydefaults.h @@ -0,0 +1,102 @@ +/**************************************************************************** + * include/sys/ttydefaults.h + * + * SPDX-License-Identifier: BSD-3-Clause + * SPDX-FileCopyrightText: 1982, 1986, 1993 The Regents of the University of + * California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER + * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + ****************************************************************************/ + +#ifndef __INCLUDE_SYS_TTYDEFAULTS_H +#define __INCLUDE_SYS_TTYDEFAULTS_H + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/* System wide defaults for terminal state. Compatible with the historical + * 4.4BSD used by portable command line utilities. + */ + +/* Control Character Defaults */ + +#define CTRL(x) ((x) & 037) + +#define CEOF CTRL('d') +#ifdef _POSIX_VDISABLE +# define CEOL _POSIX_VDISABLE +#else +# define CEOL '\0' /* XXX avoid _POSIX_VDISABLE requirement */ +#endif +#define CERASE 0177 +#define CINTR CTRL('c') +#define CSTATUS CTRL('t') +#define CKILL CTRL('u') +#define CMIN 1 +#define CQUIT 034 /* FS, ^\ */ +#define CSUSP CTRL('z') +#define CTIME 0 +#define CDSUSP CTRL('y') +#define CSTART CTRL('q') +#define CSTOP CTRL('s') +#define CLNEXT CTRL('v') +#define CDISCARD CTRL('o') +#define CWERASE CTRL('w') +#define CREPRINT CTRL('r') +#define CEOT CEOF + +/* Compat */ + +#define CBRK CEOL +#define CRPRNT CREPRINT +#define CFLUSH CDISCARD + +/* PROTECTED INCLUSION ENDS HERE */ + +/* #define TTYDEFCHARS to include an array of default control characters. */ + +#ifdef TTYDEFCHARS + +static const cc_t ttydefchars[] = +{ + CEOF, CEOL, CEOL, CERASE, CWERASE, CKILL, CREPRINT, CERASE, CINTR, + CQUIT, CSUSP, CDSUSP, CSTART, CSTOP, CLNEXT, CDISCARD, CMIN, CTIME, + CSTATUS, _POSIX_VDISABLE +}; + +#undef TTYDEFCHARS +#endif /* TTYDEFCHARS */ + +/* Default terminal flag values (only used if referenced). */ + +#define TTYDEF_IFLAG (BRKINT | ISTRIP | ICRNL | IMAXBEL | IXON | IXANY) +#define TTYDEF_OFLAG (OPOST | ONLCR) +#define TTYDEF_LFLAG (ECHO | ICANON | ISIG | IEXTEN | ECHOE | ECHOKE | ECHOCTL) +#define TTYDEF_CFLAG (CREAD | CS7 | PARENB | HUPCL) +#define TTYDEF_SPEED (B9600) + +#endif /* __INCLUDE_SYS_TTYDEFAULTS_H */ diff --git a/include/termios.h b/include/termios.h index 9b8725e06aa4a..55efe7bcd91a3 100644 --- a/include/termios.h +++ b/include/termios.h @@ -51,6 +51,7 @@ #define IXANY (1 << 11) /* Bit 11: Enable any character to restart output */ #define IXOFF (1 << 12) /* Bit 12: Enable start/stop input control */ #define IMAXBEL (1 << 13) /* Bit 13: Ring bell when input queue is full */ +#define IUTF8 (1 << 14) /* Bit 14: Input is UTF8 (for canonical erase) */ /* Terminal output modes (c_oflag in the termios structure) */