579 lines
15 KiB
C
579 lines
15 KiB
C
/* $XTermId: resize.c,v 1.108 2009/05/31 14:00:16 tom Exp $ */
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/*
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* Copyright 2003-2008,2009 by Thomas E. Dickey
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*
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* All Rights Reserved
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT HOLDER(S) BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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* Except as contained in this notice, the name(s) of the above copyright
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* holders shall not be used in advertising or otherwise to promote the
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* sale, use or other dealings in this Software without prior written
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* authorization.
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*
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*
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* Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
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*
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* All Rights Reserved
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*
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* Permission to use, copy, modify, and distribute this software and its
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* documentation for any purpose and without fee is hereby granted,
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* provided that the above copyright notice appear in all copies and that
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* both that copyright notice and this permission notice appear in
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* supporting documentation, and that the name of Digital Equipment
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* Corporation not be used in advertising or publicity pertaining to
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* distribution of the software without specific, written prior permission.
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*
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*
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* DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
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* ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
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* DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
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* ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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* WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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* ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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* SOFTWARE.
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*/
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/* resize.c */
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#include <xterm.h>
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#include <stdio.h>
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#include <ctype.h>
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#include <xstrings.h>
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#include <xtermcap.h>
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#include <xterm_io.h>
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#ifdef APOLLO_SR9
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#define CANT_OPEN_DEV_TTY
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#endif
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#ifndef USE_TERMINFO /* avoid conflict with configure script */
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#if defined(__QNX__) || defined(__SCO__) || defined(linux) || defined(__OpenBSD__) || defined(__UNIXWARE__)
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#define USE_TERMINFO
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#endif
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#endif
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#if defined(__QNX__)
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#include <unix.h>
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#endif
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/*
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* Some OS's may want to use both, like SCO for example. We catch here anyone
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* who hasn't decided what they want.
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*/
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#if !defined(USE_TERMCAP) && !defined(USE_TERMINFO)
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#define USE_TERMINFO
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#endif
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#include <signal.h>
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#include <pwd.h>
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#ifdef X_NOT_POSIX
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#if !defined(SYSV) && !defined(i386)
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extern struct passwd *getpwuid(); /* does ANYBODY need this? */
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#endif /* SYSV && i386 */
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#endif /* X_NOT_POSIX */
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#ifdef __MVS__
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#define ESCAPE(string) "\047" string
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#else
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#define ESCAPE(string) "\033" string
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#endif
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#define EMULATIONS 2
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#define SUN 1
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#define VT100 0
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#define TIMEOUT 10
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#define SHELL_UNKNOWN 0
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#define SHELL_C 1
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#define SHELL_BOURNE 2
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/* *INDENT-OFF* */
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static struct {
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char *name;
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int type;
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} shell_list[] = {
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{ "csh", SHELL_C }, /* vanilla cshell */
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{ "tcsh", SHELL_C },
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{ "jcsh", SHELL_C },
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{ "sh", SHELL_BOURNE }, /* vanilla Bourne shell */
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{ "ksh", SHELL_BOURNE }, /* Korn shell (from AT&T toolchest) */
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{ "ksh-i", SHELL_BOURNE }, /* other name for latest Korn shell */
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{ "bash", SHELL_BOURNE }, /* GNU Bourne again shell */
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{ "jsh", SHELL_BOURNE },
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{ NULL, SHELL_BOURNE } /* default (same as xterm's) */
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};
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/* *INDENT-ON* */
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static char *emuname[EMULATIONS] =
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{
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"VT100",
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"Sun",
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};
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static char *myname;
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static int shell_type = SHELL_UNKNOWN;
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static char *getsize[EMULATIONS] =
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{
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ESCAPE("7") ESCAPE("[r") ESCAPE("[999;999H") ESCAPE("[6n"),
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ESCAPE("[18t"),
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};
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#if defined(USE_STRUCT_TTYSIZE)
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#elif defined(USE_STRUCT_WINSIZE)
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static char *getwsize[EMULATIONS] =
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{ /* size in pixels */
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0,
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ESCAPE("[14t"),
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};
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#endif /* USE_STRUCT_{TTYSIZE|WINSIZE} */
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static char *restore[EMULATIONS] =
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{
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ESCAPE("8"),
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0,
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};
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static char *setname = "";
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static char *setsize[EMULATIONS] =
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{
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0,
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ESCAPE("[8;%s;%st"),
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};
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#ifdef USE_ANY_SYSV_TERMIO
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static struct termio tioorig;
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#elif defined(USE_TERMIOS)
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static struct termios tioorig;
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#else
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static struct sgttyb sgorig;
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#endif /* USE_ANY_SYSV_TERMIO/USE_TERMIOS */
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static char *size[EMULATIONS] =
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{
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ESCAPE("[%d;%dR"),
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ESCAPE("[8;%d;%dt"),
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};
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static char sunname[] = "sunsize";
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static int tty;
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static FILE *ttyfp;
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#if defined(USE_STRUCT_TTYSIZE)
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#elif defined(USE_STRUCT_WINSIZE)
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static char *wsize[EMULATIONS] =
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{
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0,
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ESCAPE("[4;%hd;%hdt"),
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};
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#endif /* USE_STRUCT_{TTYSIZE|WINSIZE} */
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static SIGNAL_T onintr(int sig);
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static SIGNAL_T resize_timeout(int sig);
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static int checkdigits(char *str);
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static void Usage(void);
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static void readstring(FILE *fp, char *buf, char *str);
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#ifdef USE_TERMCAP
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static void
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print_termcap(const char *termcap)
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{
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int ch;
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putchar('\'');
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while ((ch = *termcap++) != '\0') {
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switch (ch & 0xff) {
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case 127: /* undo bug in GNU termcap */
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printf("^?");
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break;
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case '\'': /* must escape anyway (unlikely) */
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/* FALLTHRU */
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case '!': /* must escape for SunOS csh */
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putchar('\\');
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/* FALLTHRU */
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default:
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putchar(ch);
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break;
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}
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}
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putchar('\'');
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}
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#endif /* USE_TERMCAP */
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/*
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resets termcap string to reflect current screen size
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*/
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int
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main(int argc, char **argv ENVP_ARG)
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{
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#ifdef USE_TERMCAP
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char *env;
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#endif
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char *ptr;
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int emu = VT100;
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char *shell;
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struct passwd *pw;
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int i;
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int rows, cols;
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#ifdef USE_ANY_SYSV_TERMIO
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struct termio tio;
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#elif defined(USE_TERMIOS)
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struct termios tio;
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#else
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struct sgttyb sg;
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#endif /* USE_ANY_SYSV_TERMIO/USE_TERMIOS */
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#ifdef USE_TERMCAP
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int ok_tcap = 1;
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char termcap[TERMCAP_SIZE];
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char newtc[TERMCAP_SIZE];
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#endif /* USE_TERMCAP */
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char buf[BUFSIZ];
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#ifdef TTYSIZE_STRUCT
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TTYSIZE_STRUCT ts;
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#endif
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char *name_of_tty;
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#ifdef CANT_OPEN_DEV_TTY
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extern char *ttyname();
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#endif
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myname = x_basename(argv[0]);
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if (strcmp(myname, sunname) == 0)
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emu = SUN;
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for (argv++, argc--; argc > 0 && **argv == '-'; argv++, argc--) {
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switch ((*argv)[1]) {
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case 's': /* Sun emulation */
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if (emu == SUN)
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Usage(); /* Never returns */
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emu = SUN;
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break;
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case 'u': /* Bourne (Unix) shell */
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shell_type = SHELL_BOURNE;
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break;
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case 'c': /* C shell */
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shell_type = SHELL_C;
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break;
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default:
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Usage(); /* Never returns */
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}
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}
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if (SHELL_UNKNOWN == shell_type) {
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/* Find out what kind of shell this user is running.
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* This is the same algorithm that xterm uses.
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*/
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if (((ptr = x_getenv("SHELL")) == NULL) &&
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(((pw = getpwuid(getuid())) == NULL) ||
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*(ptr = pw->pw_shell) == 0))
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/* this is the same default that xterm uses */
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ptr = "/bin/sh";
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shell = x_basename(ptr);
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/* now that we know, what kind is it? */
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for (i = 0; shell_list[i].name; i++)
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if (!strcmp(shell_list[i].name, shell))
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break;
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shell_type = shell_list[i].type;
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}
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if (argc == 2) {
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if (!setsize[emu]) {
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fprintf(stderr,
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"%s: Can't set window size under %s emulation\n",
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myname, emuname[emu]);
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exit(1);
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}
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if (!checkdigits(argv[0]) || !checkdigits(argv[1]))
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Usage(); /* Never returns */
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} else if (argc != 0)
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Usage(); /* Never returns */
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#ifdef CANT_OPEN_DEV_TTY
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if ((name_of_tty = ttyname(fileno(stderr))) == NULL)
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#endif
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name_of_tty = "/dev/tty";
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if ((ttyfp = fopen(name_of_tty, "r+")) == NULL) {
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fprintf(stderr, "%s: can't open terminal %s\n",
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myname, name_of_tty);
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exit(1);
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}
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tty = fileno(ttyfp);
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#ifdef USE_TERMCAP
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if ((env = x_getenv("TERM")) == 0) {
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env = DFT_TERMTYPE;
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if (SHELL_BOURNE == shell_type)
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setname = "TERM=" DFT_TERMTYPE ";\nexport TERM;\n";
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else
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setname = "setenv TERM " DFT_TERMTYPE ";\n";
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}
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termcap[0] = 0; /* ...just in case we've accidentally gotten terminfo */
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if (tgetent(termcap, env) <= 0 || termcap[0] == 0)
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ok_tcap = 0;
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#endif /* USE_TERMCAP */
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#ifdef USE_TERMINFO
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if (x_getenv("TERM") == 0) {
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if (SHELL_BOURNE == shell_type)
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setname = "TERM=" DFT_TERMTYPE ";\nexport TERM;\n";
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else
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setname = "setenv TERM " DFT_TERMTYPE ";\n";
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}
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#endif /* USE_TERMINFO */
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#ifdef USE_ANY_SYSV_TERMIO
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ioctl(tty, TCGETA, &tioorig);
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tio = tioorig;
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tio.c_iflag &= ~(ICRNL | IUCLC);
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tio.c_lflag &= ~(ICANON | ECHO);
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tio.c_cflag |= CS8;
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tio.c_cc[VMIN] = 6;
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tio.c_cc[VTIME] = 1;
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#elif defined(USE_TERMIOS)
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tcgetattr(tty, &tioorig);
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tio = tioorig;
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tio.c_iflag &= ~ICRNL;
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tio.c_lflag &= ~(ICANON | ECHO);
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tio.c_cflag |= CS8;
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tio.c_cc[VMIN] = 6;
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tio.c_cc[VTIME] = 1;
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#else /* not USE_TERMIOS */
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ioctl(tty, TIOCGETP, &sgorig);
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sg = sgorig;
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sg.sg_flags |= RAW;
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sg.sg_flags &= ~ECHO;
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#endif /* USE_ANY_SYSV_TERMIO/USE_TERMIOS */
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signal(SIGINT, onintr);
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signal(SIGQUIT, onintr);
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signal(SIGTERM, onintr);
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#ifdef USE_ANY_SYSV_TERMIO
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ioctl(tty, TCSETAW, &tio);
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#elif defined(USE_TERMIOS)
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tcsetattr(tty, TCSADRAIN, &tio);
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#else /* not USE_TERMIOS */
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ioctl(tty, TIOCSETP, &sg);
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#endif /* USE_ANY_SYSV_TERMIO/USE_TERMIOS */
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if (argc == 2) {
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char *tmpbuf = TypeMallocN(char,
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strlen(setsize[emu]) +
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strlen(argv[0]) +
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strlen(argv[1]) +
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1);
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if (tmpbuf == 0) {
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fprintf(stderr, "%s: Cannot query size\n", myname);
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onintr(0);
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}
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sprintf(tmpbuf, setsize[emu], argv[0], argv[1]);
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write(tty, tmpbuf, strlen(tmpbuf));
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free(tmpbuf);
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}
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write(tty, getsize[emu], strlen(getsize[emu]));
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readstring(ttyfp, buf, size[emu]);
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if (sscanf(buf, size[emu], &rows, &cols) != 2) {
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fprintf(stderr, "%s: Can't get rows and columns\r\n", myname);
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onintr(0);
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}
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if (restore[emu])
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write(tty, restore[emu], strlen(restore[emu]));
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#if defined(USE_STRUCT_TTYSIZE)
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/* finally, set the tty's window size */
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if (ioctl(tty, TIOCGSIZE, &ts) != -1) {
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TTYSIZE_ROWS(ts) = rows;
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TTYSIZE_COLS(ts) = cols;
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SET_TTYSIZE(tty, ts);
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}
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#elif defined(USE_STRUCT_WINSIZE)
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/* finally, set the tty's window size */
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if (getwsize[emu]) {
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/* get the window size in pixels */
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write(tty, getwsize[emu], strlen(getwsize[emu]));
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readstring(ttyfp, buf, wsize[emu]);
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if (sscanf(buf, wsize[emu], &ts.ws_xpixel, &ts.ws_ypixel) != 2) {
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fprintf(stderr, "%s: Can't get window size\r\n", myname);
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onintr(0);
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}
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TTYSIZE_ROWS(ts) = rows;
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TTYSIZE_COLS(ts) = cols;
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SET_TTYSIZE(tty, ts);
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} else if (ioctl(tty, TIOCGWINSZ, &ts) != -1) {
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/* we don't have any way of directly finding out
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the current height & width of the window in pixels. We try
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our best by computing the font height and width from the "old"
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window-size values, and multiplying by these ratios... */
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if (TTYSIZE_COLS(ts) != 0)
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ts.ws_xpixel = cols * (ts.ws_xpixel / TTYSIZE_COLS(ts));
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if (TTYSIZE_ROWS(ts) != 0)
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ts.ws_ypixel = rows * (ts.ws_ypixel / TTYSIZE_ROWS(ts));
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TTYSIZE_ROWS(ts) = rows;
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TTYSIZE_COLS(ts) = cols;
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SET_TTYSIZE(tty, ts);
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}
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#endif /* USE_STRUCT_{TTYSIZE|WINSIZE} */
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#ifdef USE_ANY_SYSV_TERMIO
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ioctl(tty, TCSETAW, &tioorig);
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#elif defined(USE_TERMIOS)
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tcsetattr(tty, TCSADRAIN, &tioorig);
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#else /* not USE_TERMIOS */
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ioctl(tty, TIOCSETP, &sgorig);
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#endif /* USE_ANY_SYSV_TERMIO/USE_TERMIOS */
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signal(SIGINT, SIG_DFL);
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signal(SIGQUIT, SIG_DFL);
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signal(SIGTERM, SIG_DFL);
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|
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#ifdef USE_TERMCAP
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if (ok_tcap) {
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/* update termcap string */
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/* first do columns */
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if ((ptr = x_strindex(termcap, "co#")) == NULL) {
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fprintf(stderr, "%s: No `co#'\n", myname);
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exit(1);
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}
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|
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i = ptr - termcap + 3;
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strncpy(newtc, termcap, (unsigned) i);
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sprintf(newtc + i, "%d", cols);
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ptr = strchr(ptr, ':');
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strcat(newtc, ptr);
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|
|
/* now do lines */
|
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if ((ptr = x_strindex(newtc, "li#")) == NULL) {
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fprintf(stderr, "%s: No `li#'\n", myname);
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exit(1);
|
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}
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|
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i = ptr - newtc + 3;
|
|
strncpy(termcap, newtc, (unsigned) i);
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sprintf(termcap + i, "%d", rows);
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ptr = strchr(ptr, ':');
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strcat(termcap, ptr);
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}
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#endif /* USE_TERMCAP */
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|
|
if (SHELL_BOURNE == shell_type) {
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|
|
#ifdef USE_TERMCAP
|
|
if (ok_tcap) {
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|
printf("%sTERMCAP=", setname);
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print_termcap(termcap);
|
|
printf(";\nexport TERMCAP;\n");
|
|
}
|
|
#endif /* USE_TERMCAP */
|
|
#ifdef USE_TERMINFO
|
|
printf("%sCOLUMNS=%d;\nLINES=%d;\nexport COLUMNS LINES;\n",
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|
setname, cols, rows);
|
|
#endif /* USE_TERMINFO */
|
|
|
|
} else { /* not Bourne shell */
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|
|
|
#ifdef USE_TERMCAP
|
|
if (ok_tcap) {
|
|
printf("set noglob;\n%ssetenv TERMCAP ", setname);
|
|
print_termcap(termcap);
|
|
printf(";\nunset noglob;\n");
|
|
}
|
|
#endif /* USE_TERMCAP */
|
|
#ifdef USE_TERMINFO
|
|
printf("set noglob;\n%ssetenv COLUMNS '%d';\nsetenv LINES '%d';\nunset noglob;\n",
|
|
setname, cols, rows);
|
|
#endif /* USE_TERMINFO */
|
|
}
|
|
exit(0);
|
|
}
|
|
|
|
static int
|
|
checkdigits(char *str)
|
|
{
|
|
while (*str) {
|
|
if (!isdigit(CharOf(*str)))
|
|
return (0);
|
|
str++;
|
|
}
|
|
return (1);
|
|
}
|
|
|
|
static void
|
|
readstring(FILE *fp, char *buf, char *str)
|
|
{
|
|
int last, c;
|
|
#if !defined(USG) && !defined(__UNIXOS2__)
|
|
/* What is the advantage of setitimer() over alarm()? */
|
|
struct itimerval it;
|
|
#endif
|
|
|
|
signal(SIGALRM, resize_timeout);
|
|
#if defined(USG) || defined(__UNIXOS2__)
|
|
alarm(TIMEOUT);
|
|
#else
|
|
memset((char *) &it, 0, sizeof(struct itimerval));
|
|
it.it_value.tv_sec = TIMEOUT;
|
|
setitimer(ITIMER_REAL, &it, (struct itimerval *) NULL);
|
|
#endif
|
|
if ((c = getc(fp)) == 0233) { /* meta-escape, CSI */
|
|
c = ESCAPE("")[0];
|
|
*buf++ = (char) c;
|
|
*buf++ = '[';
|
|
} else {
|
|
*buf++ = (char) c;
|
|
}
|
|
if (c != *str) {
|
|
fprintf(stderr, "%s: unknown character, exiting.\r\n", myname);
|
|
onintr(0);
|
|
}
|
|
last = str[strlen(str) - 1];
|
|
while ((*buf++ = (char) getc(fp)) != last) {
|
|
;
|
|
}
|
|
#if defined(USG) || defined(__UNIXOS2__)
|
|
alarm(0);
|
|
#else
|
|
memset((char *) &it, 0, sizeof(struct itimerval));
|
|
setitimer(ITIMER_REAL, &it, (struct itimerval *) NULL);
|
|
#endif
|
|
*buf = 0;
|
|
}
|
|
|
|
static void
|
|
Usage(void)
|
|
{
|
|
fprintf(stderr, strcmp(myname, sunname) == 0 ?
|
|
"Usage: %s [rows cols]\n" :
|
|
"Usage: %s [-u] [-c] [-s [rows cols]]\n", myname);
|
|
exit(1);
|
|
}
|
|
|
|
static SIGNAL_T
|
|
resize_timeout(int sig)
|
|
{
|
|
fprintf(stderr, "\n%s: Time out occurred\r\n", myname);
|
|
onintr(sig);
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
static SIGNAL_T
|
|
onintr(int sig GCC_UNUSED)
|
|
{
|
|
#ifdef USE_ANY_SYSV_TERMIO
|
|
ioctl(tty, TCSETAW, &tioorig);
|
|
#elif defined(USE_TERMIOS)
|
|
tcsetattr(tty, TCSADRAIN, &tioorig);
|
|
#else /* not USE_TERMIOS */
|
|
ioctl(tty, TIOCSETP, &sgorig);
|
|
#endif /* USE_ANY_SYSV_TERMIO/USE_TERMIOS */
|
|
exit(1);
|
|
}
|