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cde/src/cmd/ksh93/include/terminal.h
Martijn Dekker a1f5c99204 INIT: remove proto, ratz (re: 46593a89, 6137b99a); major cleanup 
This takes another step towards cleaning up the build system. We
now do not even pretend to be theoretically compatible with
pre-1989 K&R C compilers or with C++ compilers. In practice, this
had already been broken for many years due to bit rot.

Commit 46593a89 already removed the license handling enormity that
depended on proto, so now we can cleanly remove it altogether. But
we do need to leave some backwards compatibility stubs to keep the
build system compatible with older AST code; it should remain
possible to build older ksh versions with the current build system
(the bin/ and src/cmd/INIT/ directories) for testing purposes.

So as of now there is no more __MANGLE__d rubbish in your generated
header files. This is only about a quarter of a century overdue...

This commit also includes a huge amount of code cleanup to remove
thousands of unused K&R C fallbacks and other cruft, particularly
in libast. This code base should now be a little easier to
understand for people who are familiar with a modern(ish) C
standard.

ratz is now also removed; this was a standalone and simplified 2005
version of gunzip. As of 6137b99a, none of our code uses it, even
theoretically. And the real g(un)zip is now everywhere.

src/cmd/INIT/proto.c, src/cmd/INIT/ratz.c:
- Removed.

COPYRIGHT:
- Remove zlib license; this only applied to ratz.

bin/package, src/cmd/INIT/package.sh:
- Related cleanups.
- Unset LC_ALL before invoking a new shell, respecting the user's
  locale again and avoiding multibyte character corruption on the
  command line.

src/cmd/INIT/proto.sh:
- Add stub for backwards compatibility with Mamfiles that depend on
  proto. It does nothing but pass input without modification and is
  now installed as the new arch/*/bin/proto by src/cmd/INIT/Mamfile.

src/cmd/INIT/iffe.sh:
- Ignore the proto-related -e (--package) and -p (--prototyped)
  options; keep parsing them for backwards compatibility.
- Trim the macros passed to every test to their standard C
  versions, removing K&R C and C++ versions. These are now
  considered to be for backwards compatibility only.

src/cmd/INIT/iffe.tst:
- Remove proto(1) mangling code.
  By the way, iffe can be regression-tested as follows:
        $ bin/package use   # set up environment in a child shell
        $ regress src/cmd/INIT/iffe.tst
        $ exit              # leave package environment

src/cmd/INIT/make.probe, src/cmd/INIT/probe.win32:
- Remove code to handle C++.

src/lib/libast/features/common:
- As in iffe.sh above, trim macros designed for compatibility with
  C++ and ancient C compilers to their standard C versions and
  comment that they are for backwards compatibility with AST code.
  This is needed to keep all the old ast and ksh code compiling.

src/cmd/ksh93/sh/init.c,
src/cmd/ksh93/sh/name.c:
- Clarify libshell ABI compatibility function versions of macros.
  A "proto workaround" comment in the original code mislead me into
  thinking this had something to do with the removed proto(1), but
  it's unrelated. Call the workaround macro BYPASS_MACRO instead.

src/cmd/ksh93/include/defs.h:
- sh_sigcheck() macro: allow &sh as an argument: parenthesise shp.

src/cmd/ksh93/sh/nvtype.c:
- Remove unused nv_mkstruct() function. (re: d0a5cab1)

**/features/*:
- Remove obsolete iffe 'set prototyped' option.

**/Mamfile:
- Remove all references to the ast/prototyped.h header.
- Remove all use of the proto command. Simply copy instead.

*** 850-ish source files: ***
- Remove all '#pragma prototyped' directives.
- Remove all C++ compat code conditional upon defined(__cplusplus).
- Remove all use of the _ARG_ macro, which on standard C expands to
  its argument:
        #define _ARG_(x)        x
  (on K&R C, it expanded to nothing)
- Remove all use of _BEGIN_EXTERNS_ and _END_EXTERNS_ macros (empty
  on standard C; this was for C++ compatibility)
- Reduce all #if __STD_C (standard code) #else (K&R code) #endif
  blocks to the standard code only, without use of the macro.
- Same for _STD_ macro which seems to have had the same function.
- Change all instances of 'Void_t' to standard 'void'.
2021-12-24 07:05:22 +00:00

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/***********************************************************************
* *
* This software is part of the ast package *
* Copyright (c) 1982-2012 AT&T Intellectual Property *
* Copyright (c) 2020-2021 Contributors to ksh 93u+m *
* and is licensed under the *
* Eclipse Public License, Version 1.0 *
* by AT&T Intellectual Property *
* *
* A copy of the License is available at *
* http://www.eclipse.org/org/documents/epl-v10.html *
* (with md5 checksum b35adb5213ca9657e911e9befb180842) *
* *
* Information and Software Systems Research *
* AT&T Research *
* Florham Park NJ *
* *
* David Korn <dgk@research.att.com> *
* *
***********************************************************************/
#ifndef _terminal_
#define _terminal_ 1
#include "FEATURE/ttys"
/*
* terminal interface
* complicated by the fact that there are so many variations
* This will use POSIX <termios.h> interface where available
*/
#ifdef _hdr_termios
# include <termios.h>
# if __sgi__ || sgi /* special hack to eliminate ^M problem */
# ifndef ECHOCTL
# define ECHOCTL ECHOE
# endif /* ECHOCTL */
# ifndef CNSUSP
# define CNSUSP CNSWTCH
# endif /* CNSUSP */
# endif /* sgi */
# ifdef _NEXT_SOURCE
# define _lib_tcgetattr 1
# define _lib_tcgetpgrp 1
# endif /* _NEXT_SOURCE */
#else
# if defined(_sys_termios) && defined(_lib_tcgetattr)
# include <sys/termios.h>
# define _hdr_termios
# else
# undef _sys_termios
# endif /* _sys_termios */
#endif /* _hdr_termios */
#ifdef _hdr_termios
# undef _hdr_sgtty
# undef tcgetattr
# undef tcsetattr
# undef tcgetpgrp
# undef tcsetpgrp
# undef cfgetospeed
# ifndef TCSANOW
# define TCSANOW TCSETS
# define TCSADRAIN TCSETSW
# define TCSAFLUSH TCSETSF
# endif /* TCSANOW */
/* The following corrects bugs in some implementations */
# if defined(TCSADFLUSH) && !defined(TCSAFLUSH)
# define TCSAFLUSH TCSADFLUSH
# endif /* TCSADFLUSH */
# ifndef _lib_tcgetattr
# undef tcgetattr
# define tcgetattr(fd,tty) ioctl(fd, TCGETS, tty)
# undef tcsetattr
# define tcsetattr(fd,action,tty) ioctl(fd, action, tty)
# undef cfgetospeed
# define cfgetospeed(tp) ((tp)->c_cflag & CBAUD)
# endif /* _lib_tcgetattr */
# undef TIOCGETC
# if SHOPT_OLDTERMIO /* use both termios and termio */
# ifdef _hdr_termio
# include <termio.h>
# else
# ifdef _sys_termio
# include <sys/termio.h>
# define _hdr_termio 1
# else
# undef SHOPT_OLDTERMIO
# endif /* _sys_termio */
# endif /* _hdr_termio */
# endif /* SHOPT_OLDTERMIO */
#else
# define cfgetospeed(tp) ((tp)->c_cflag & CBAUD)
# undef SHOPT_OLDTERMIO
# ifdef _hdr_termio
# include <termio.h>
# else
# ifdef _sys_termio
# include <sys/termio.h>
# define _hdr_termio 1
# endif /* _sys_termio */
# endif /* _hdr_termio */
# ifdef _hdr_termio
# define termios termio
# undef TIOCGETC
# define tcgetattr(fd,tty) ioctl(fd, TCGETA, tty)
# define tcsetattr(fd,action,tty) ioctl(fd, action, tty)
# ifdef _sys_bsdtty
# include <sys/bsdtty.h>
# endif /* _sys_bsdtty */
# else
# ifdef _hdr_sgtty
# include <sgtty.h>
# ifndef LPENDIN
# ifdef _sys_nttyio
# include <sys/nttyio.h>
# endif /* _sys_nttyio */
# endif /* LPENDIN */
# define termios sgttyb
# ifdef TIOCSETN
# undef TCSETAW
# endif /* TIOCSETN */
# ifdef TIOCGETP
# define tcgetattr(fd,tty) ioctl(fd, TIOCGETP, tty)
# define tcsetattr(fd,action,tty) ioctl(fd, action, tty)
# else
# define tcgetattr(fd,tty) gtty(fd, tty)
# define tcsetattr(fd,action,tty) stty(fd, tty)
# endif /* TIOCGETP */
# endif /* _hdr_sgtty */
# endif /* hdr_termio */
# ifndef TCSANOW
# ifdef TCSETAW
# define TCSANOW TCSETA
# ifdef u370
/* delays are too long, don't wait for output to drain */
# define TCSADRAIN TCSETA
# else
# define TCSADRAIN TCSETAW
# endif /* u370 */
# define TCSAFLUSH TCSETAF
# else
# ifdef TIOCSETN
# define TCSANOW TIOCSETN
# define TCSADRAIN TIOCSETN
# define TCSAFLUSH TIOCSETP
# endif /* TIOCSETN */
# endif /* TCSETAW */
# endif /* TCSANOW */
#endif /* _hdr_termios */
/* set ECHOCTL if driver can echo control characters as ^c */
#ifdef LCTLECH
# ifndef ECHOCTL
# define ECHOCTL LCTLECH
# endif /* !ECHOCTL */
#endif /* LCTLECH */
#ifdef LNEW_CTLECH
# ifndef ECHOCTL
# define ECHOCTL LNEW_CTLECH
# endif /* !ECHOCTL */
#endif /* LNEW_CTLECH */
#ifdef LNEW_PENDIN
# ifndef PENDIN
# define PENDIN LNEW_PENDIN
# endif /* !PENDIN */
#endif /* LNEW_PENDIN */
#ifndef ECHOCTL
# ifndef VEOL
# define RAWONLY 1
# endif /* !VEOL */
#endif /* !ECHOCTL */
#ifdef _sys_filio
# ifndef FIONREAD
# include <sys/filio.h>
# endif /* FIONREAD */
#endif /* _sys_filio */
/* set FIORDCHK if you can check for characters in input queue */
#ifdef FIONREAD
# ifndef FIORDCHK
# define FIORDCHK FIONREAD
# endif /* !FIORDCHK */
#endif /* FIONREAD */
#if _sys_ioctl
#include <sys/ioctl.h>
#endif
extern int tty_alt(int);
extern void tty_cooked(int);
extern int tty_get(int,struct termios*);
extern int tty_raw(int,int);
extern int tty_check(int);
extern int tty_set(int, int, struct termios*);
extern int sh_ioctl(int,int,void*,int);
#define ioctl(a,b,c) sh_ioctl(a,b,c,sizeof(c))
#ifdef _lib_tcgetattr
extern int sh_tcgetattr(int,struct termios*);
extern int sh_tcsetattr(int,int,struct termios*);
# define tcgetattr(a,b) sh_tcgetattr(a,b)
# define tcsetattr(a,b,c) sh_tcsetattr(a,b,c)
#endif
#endif /* _terminal_ */
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