resize.c

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Author : matthieu
Date : 2025-06-14 12:33:57
Hash : 7c34ad48
Message : Update to xterm 399. tested by kirill@ Also reduce the diffs between the generated xtermcfg.h when using configure and the one we provide for the BSD makefile. The file after this diff matches the result of configure with : configure --enable-backarrow-is-erase \ --enable-delete-is-del --enable-initial-erase \ --disable-tek4014 --with-terminal-id=vt100 \ --enable-broken-st --disable-exec-selection \ --disable-sixel-graphics --enable-initial-erase \ --disable-paste64 --disable-readline-mouse \ --disable-screen-dumps \ --disable-tcap-fkeys --disable-tcap-query \ --with-utmp-setgid
app/xterm/resize.c
/* $XTermId: resize.c,v 1.154 2025/03/08 13:21:57 tom Exp $ */

/*
 * Copyright 2003-2024,2025 by Thomas E. Dickey
 *
 *                         All Rights Reserved
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT HOLDER(S) BE LIABLE FOR ANY
 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 * Except as contained in this notice, the name(s) of the above copyright
 * holders shall not be used in advertising or otherwise to promote the
 * sale, use or other dealings in this Software without prior written
 * authorization.
 *
 *
 * Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
 *
 *                         All Rights Reserved
 *
 * Permission to use, copy, modify, and distribute this software and its
 * documentation for any purpose and without fee is hereby granted,
 * provided that the above copyright notice appear in all copies and that
 * both that copyright notice and this permission notice appear in
 * supporting documentation, and that the name of Digital Equipment
 * Corporation not be used in advertising or publicity pertaining to
 * distribution of the software without specific, written prior permission.
 *
 *
 * DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
 * ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
 * DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
 * ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
 * WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
 * ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
 * SOFTWARE.
 */

/* resize.c */

#include <stdio.h>
#include <ctype.h>

#include <xterm.h>
#include <version.h>
#include <xstrings.h>
#include <xtermcap.h>
#include <xterm_io.h>

#ifndef USE_TERMINFO		/* avoid conflict with configure script */
#if defined(__QNX__) || defined(__SCO__) || defined(linux) || defined(__OpenBSD__) || defined(__UNIXWARE__)
#define USE_TERMINFO
#endif
#endif

#if defined(__QNX__)
#include <unix.h>
#endif

/*
 * Some OS's may want to use both, like SCO for example.  We catch here anyone
 * who hasn't decided what they want.
 */
#if !defined(USE_TERMCAP) && !defined(USE_TERMINFO)
#define USE_TERMINFO
#endif

#include <signal.h>
#include <pwd.h>

#ifdef USE_IGNORE_RC
int ignore_unused;
#endif

#define ESCAPE(string) "\033" string

#define	EMULATIONS	2
#define	SUN		1
#define	VT100		0

#define	TIMEOUT		3

#define	SHELL_UNKNOWN	0
#define	SHELL_C		1
#define	SHELL_BOURNE	2
/* *INDENT-OFF* */
static struct {
    const char *name;
    int type;
} shell_list[] = {
    { "csh",	SHELL_C },	/* vanilla cshell */
    { "jcsh",   SHELL_C },
    { "tcsh",   SHELL_C },
    { "sh",	SHELL_BOURNE }, /* vanilla Bourne shell */
    { "ash",    SHELL_BOURNE },
    { "bash",	SHELL_BOURNE }, /* GNU Bourne again shell */
    { "dash",	SHELL_BOURNE },
    { "jsh",    SHELL_BOURNE },
    { "ksh",	SHELL_BOURNE }, /* Korn shell (from AT&T toolchest) */
    { "ksh-i",	SHELL_BOURNE }, /* another name for Korn shell */
    { "ksh93",	SHELL_BOURNE }, /* Korn shell */
    { "mksh",   SHELL_BOURNE },
    { "pdksh",  SHELL_BOURNE },
    { "zsh",    SHELL_BOURNE },
    { NULL,	SHELL_BOURNE }	/* default (same as xterm's) */
};
/* *INDENT-ON* */

static const char *const emuname[EMULATIONS] =
{
    "VT100",
    "Sun",
};
static char *myname;
static int shell_type = SHELL_UNKNOWN;
static const char *const getattr[EMULATIONS] =
{
    ESCAPE("[c"),
    NULL,
};
static const char *const getsize[EMULATIONS] =
{
    ESCAPE("7") ESCAPE("[r") ESCAPE("[9999;9999H") ESCAPE("[6n"),
    ESCAPE("[18t"),
};
#if defined(USE_STRUCT_WINSIZE)
static const char *const getwsize[EMULATIONS] =
{				/* size in pixels */
    NULL,
    ESCAPE("[14t"),
};
#endif /* USE_STRUCT_WINSIZE */
static const char *const restore[EMULATIONS] =
{
    ESCAPE("8"),
    NULL,
};
static const char *const setsize[EMULATIONS] =
{
    NULL,
    ESCAPE("[8;%s;%st"),
};

#ifdef USE_ANY_SYSV_TERMIO
static struct termio tioorig;
#elif defined(USE_TERMIOS)
static struct termios tioorig;
#else
static struct sgttyb sgorig;
#endif /* USE_ANY_SYSV_TERMIO/USE_TERMIOS */

static const char *const reply_attr[EMULATIONS] =
{
    ESCAPE("[?%d;%dc"),
    NULL,
};
static const char *const reply_size[EMULATIONS] =
{
    ESCAPE("[%d;%dR"),
    ESCAPE("[8;%d;%dt"),
};
static const char sunname[] = "sunsize";
static int tty;
static FILE *ttyfp;

#if defined(USE_STRUCT_WINSIZE)
static const char *wsize[EMULATIONS] =
{
    NULL,
    ESCAPE("[4;%hd;%hdt"),
};
#endif /* USE_STRUCT_WINSIZE */

static GCC_NORETURN void failed(const char *);
static GCC_NORETURN void onintr(int);
static GCC_NORETURN void resize_timeout(int);
static GCC_NORETURN void Usage(void);

static void
failed(const char *s)
{
    int save = errno;
    IGNORE_RC(write(2, myname, strlen(myname)));
    IGNORE_RC(write(2, ": ", (size_t) 2));
    errno = save;
    perror(s);
    exit(EXIT_FAILURE);
}

/* ARGSUSED */
static void
onintr(int sig GCC_UNUSED)
{
#ifdef USE_ANY_SYSV_TERMIO
    (void) ioctl(tty, TCSETAW, &tioorig);
#elif defined(USE_TERMIOS)
    (void) tcsetattr(tty, TCSADRAIN, &tioorig);
#else /* not USE_TERMIOS */
    (void) ioctl(tty, TIOCSETP, &sgorig);
#endif /* USE_ANY_SYSV_TERMIO/USE_TERMIOS */
    exit(EXIT_FAILURE);
}

const char *timeout_message = "?";

static void
resize_timeout(int sig)
{
    fprintf(stderr, "\n%s: %s\r\n", myname, timeout_message);
    onintr(sig);
}

static void
Usage(void)
{
    fprintf(stderr, strcmp(myname, sunname) == 0 ?
	    "Usage: %s [rows cols]\n" :
	    "Usage: %s [-v] [-u] [-c] [-s [rows cols]]\n", myname);
    exit(EXIT_FAILURE);
}

#ifdef USE_TERMCAP
static void
print_termcap(const char *termcap)
{
    int ch;

    putchar('\'');
    while ((ch = *termcap++) != '\0') {
	switch (ch & 0xff) {
	case 127:		/* undo bug in GNU termcap */
	    printf("^?");
	    break;
	case '\'':		/* must escape anyway (unlikely) */
	    /* FALLTHRU */
	case '!':		/* must escape for SunOS csh */
	    putchar('\\');
	    /* FALLTHRU */
	default:
	    putchar(ch);
	    break;
	}
    }
    putchar('\'');
}
#endif /* USE_TERMCAP */

static int
checkdigits(char *str)
{
    while (*str) {
	if (!isdigit(CharOf(*str)))
	    return (0);
	str++;
    }
    return (1);
}

static void
unexpected_char(int c)
{
    fprintf(stderr,
	    "%s: unknown character %#x, exiting.\r\n",
	    myname, (unsigned) c);
    onintr(0);
}

static void
readstring(FILE *fp, char *buf, const char *str)
{
    int last, c;
#if HAVE_SETITIMER
    struct itimerval it;
#endif
    int limit = (BUFSIZ - 3);

    signal(SIGALRM, resize_timeout);
#if HAVE_SETITIMER
    memset((char *) &it, 0, sizeof(struct itimerval));
    it.it_value.tv_sec = TIMEOUT;
    setitimer(ITIMER_REAL, &it, (struct itimerval *) NULL);
#else
    alarm(TIMEOUT);
#endif
    if ((c = getc(fp)) == 0233) {	/* meta-escape, CSI */
	c = ESCAPE("")[0];
	*buf++ = (char) c;
	*buf++ = '[';
    } else {
	*buf++ = (char) c;
    }
    if (c != *str) {
	unexpected_char(c);
    }
    last = str[strlen(str) - 1];
    while ((c = getc(fp)) != EOF) {
	if (--limit <= 0) {
	    fprintf(stderr, "%s: unexpected response\n", myname);
	    onintr(0);
	}
	if (c < 32 || c > 126) {
	    unexpected_char(c);
	}
	*buf++ = (char) c;
	if (c == last)
	    break;
    }
#if HAVE_SETITIMER
    memset((char *) &it, 0, sizeof(struct itimerval));
    setitimer(ITIMER_REAL, &it, (struct itimerval *) NULL);
#else
    alarm(0);
#endif
    *buf = 0;
}

/*
   resets termcap string to reflect current screen size
 */
int
main(int argc, char **argv ENVP_ARG)
{
#ifdef USE_TERMCAP
    char *env;
#endif
    char *ptr;
    int emu = VT100;
    char *shell;
    int i;
    int rc;
    int rows, cols;
#ifdef USE_ANY_SYSV_TERMIO
    struct termio tio;
#elif defined(USE_TERMIOS)
    struct termios tio;
#else
    struct sgttyb sg;
#endif /* USE_ANY_SYSV_TERMIO/USE_TERMIOS */
#ifdef USE_TERMCAP
    int ok_tcap = 1;
    char termcap[TERMCAP_SIZE];
    char newtc[TERMCAP_SIZE];
#endif /* USE_TERMCAP */
    char buf[BUFSIZ];
#ifdef TTYSIZE_STRUCT
    TTYSIZE_STRUCT ts;
#endif
    char *name_of_tty;
#ifdef CANT_OPEN_DEV_TTY
    extern char *ttyname();
#endif
    const char *setname = "";

    myname = x_basename(argv[0]);
    if (strcmp(myname, sunname) == 0)
	emu = SUN;
    for (argv++, argc--; argc > 0 && **argv == '-'; argv++, argc--) {
	switch ((*argv)[1]) {
	case 's':		/* Sun emulation */
	    if (emu == SUN)
		Usage();	/* Never returns */
	    emu = SUN;
	    break;
	case 'u':		/* Bourne (Unix) shell */
	    shell_type = SHELL_BOURNE;
	    break;
	case 'c':		/* C shell */
	    shell_type = SHELL_C;
	    break;
	case 'v':
	    printf("%s\n", xtermVersion());
	    exit(EXIT_SUCCESS);
	default:
	    Usage();		/* Never returns */
	}
    }

    if (SHELL_UNKNOWN == shell_type) {
	/* Find out what kind of shell this user is running.
	 * This is the same algorithm that xterm uses.
	 */
	if ((ptr = x_getenv("SHELL")) == NULL) {
	    uid_t uid = getuid();
	    struct passwd pw;

	    if (x_getpwuid(uid, &pw)) {
		(void) x_getlogin(uid, &pw);
	    }
	    if (!OkPasswd(&pw)
		|| *(ptr = pw.pw_shell) == 0) {
		/* this is the same default that xterm uses */
		ptr = x_strdup("/bin/sh");
	    }
	}

	shell = x_basename(ptr);

	/* now that we know, what kind is it? */
	for (i = 0; shell_list[i].name; i++) {
	    if (!strcmp(shell_list[i].name, shell)) {
		break;
	    }
	}
	shell_type = shell_list[i].type;
    }

    if (argc == 2) {
	if (!setsize[emu]) {
	    fprintf(stderr,
		    "%s: Can't set window size under %s emulation\n",
		    myname, emuname[emu]);
	    exit(EXIT_FAILURE);
	}
	if (!checkdigits(argv[0]) || !checkdigits(argv[1])) {
	    Usage();		/* Never returns */
	}
    } else if (argc != 0) {
	Usage();		/* Never returns */
    }
#ifdef CANT_OPEN_DEV_TTY
    if ((name_of_tty = ttyname(fileno(stderr))) == NULL)
#endif
	name_of_tty = x_strdup("/dev/tty");

    if ((ttyfp = fopen(name_of_tty, "r+")) == NULL) {
	fprintf(stderr, "%s:  can't open terminal %s\n",
		myname, name_of_tty);
	exit(EXIT_FAILURE);
    }
    tty = fileno(ttyfp);
#ifdef USE_TERMCAP
    if ((env = x_getenv("TERM")) == NULL) {
	env = x_strdup(DFT_TERMTYPE);
	if (SHELL_BOURNE == shell_type) {
	    setname = "TERM=" DFT_TERMTYPE ";\nexport TERM;\n";
	} else {
	    setname = "setenv TERM " DFT_TERMTYPE ";\n";
	}
    }
    termcap[0] = 0;		/* ...just in case we've accidentally gotten terminfo */
    if (tgetent(termcap, env) <= 0 || termcap[0] == 0) {
	ok_tcap = 0;
    }
#endif /* USE_TERMCAP */
#ifdef USE_TERMINFO
    if (x_getenv("TERM") == NULL) {
	if (SHELL_BOURNE == shell_type) {
	    setname = "TERM=" DFT_TERMTYPE ";\nexport TERM;\n";
	} else {
	    setname = "setenv TERM " DFT_TERMTYPE ";\n";
	}
    }
#endif /* USE_TERMINFO */

#ifdef USE_ANY_SYSV_TERMIO
    rc = ioctl(tty, TCGETA, &tioorig);
    tio = tioorig;
    UIntClr(tio.c_iflag, (ICRNL | IUCLC));
    UIntClr(tio.c_lflag, (ICANON | ECHO));
    tio.c_cflag |= CS8;
    tio.c_cc[VMIN] = 6;
    tio.c_cc[VTIME] = 1;
#elif defined(USE_TERMIOS)
    rc = tcgetattr(tty, &tioorig);
    tio = tioorig;
    UIntClr(tio.c_iflag, ICRNL);
    UIntClr(tio.c_lflag, (ICANON | ECHO));
    tio.c_cflag |= CS8;
    tio.c_cc[VMIN] = 6;
    tio.c_cc[VTIME] = 1;
#else /* not USE_TERMIOS */
    rc = ioctl(tty, TIOCGETP, &sgorig);
    sg = sgorig;
    sg.sg_flags |= RAW;
    UIntClr(sg.sg_flags, ECHO);
#endif /* USE_ANY_SYSV_TERMIO/USE_TERMIOS */
    if (rc != 0)
	failed("get tty settings");

    signal(SIGINT, onintr);
    signal(SIGQUIT, onintr);
    signal(SIGTERM, onintr);

#ifdef USE_ANY_SYSV_TERMIO
    rc = ioctl(tty, TCSETAW, &tio);
#elif defined(USE_TERMIOS)
    rc = tcsetattr(tty, TCSADRAIN, &tio);
#else /* not USE_TERMIOS */
    rc = ioctl(tty, TIOCSETP, &sg);
#endif /* USE_ANY_SYSV_TERMIO/USE_TERMIOS */
    if (rc != 0)
	failed("set tty settings");

    if (argc == 2) {		/* look for optional parameters of "-s" */
	char *tmpbuf = TypeMallocN(char,
				   strlen(setsize[emu]) +
				   strlen(argv[0]) +
				   strlen(argv[1]) +
				   1);
	if (tmpbuf == NULL) {
	    fprintf(stderr, "%s: Cannot query size\n", myname);
	    onintr(0);
	} else {
	    sprintf(tmpbuf, setsize[emu], argv[0], argv[1]);
	    IGNORE_RC(write(tty, tmpbuf, strlen(tmpbuf)));
	    free(tmpbuf);
	}
    }
    if (getattr[emu]) {
	timeout_message = "Terminal is not VT100-compatible";
	IGNORE_RC(write(tty, getattr[emu], strlen(getattr[emu])));
	readstring(ttyfp, buf, reply_attr[emu]);
    }
    timeout_message = "Time out occurred";
    IGNORE_RC(write(tty, getsize[emu], strlen(getsize[emu])));
    readstring(ttyfp, buf, reply_size[emu]);
    if (sscanf(buf, reply_size[emu], &rows, &cols) != 2) {
	fprintf(stderr, "%s: Can't get rows and columns\r\n", myname);
	onintr(0);
    }
    if (restore[emu])
	IGNORE_RC(write(tty, restore[emu], strlen(restore[emu])));
#if defined(USE_STRUCT_WINSIZE)
    /* finally, set the tty's window size */
    if (getwsize[emu]) {
	/* get the window size in pixels */
	IGNORE_RC(write(tty, getwsize[emu], strlen(getwsize[emu])));
	readstring(ttyfp, buf, wsize[emu]);
	if (sscanf(buf, wsize[emu], &ts.ws_xpixel, &ts.ws_ypixel) != 2) {
	    fprintf(stderr, "%s: Can't get window size\r\n", myname);
	    onintr(0);
	}
	setup_winsize(ts, rows, cols, 0, 0);
	SET_TTYSIZE(tty, ts);
    } else if (ioctl(tty, TIOCGWINSZ, &ts) != -1) {
	/* we don't have any way of directly finding out
	   the current height & width of the window in pixels.  We try
	   our best by computing the font height and width from the "old"
	   window-size values, and multiplying by these ratios... */
#define scaled(old,new,len) (old)?((unsigned)(new)*(len)/(old)):(len)
	setup_winsize(ts, rows, cols,
		      scaled(TTYSIZE_ROWS(ts), rows, ts.ws_ypixel),
		      scaled(TTYSIZE_COLS(ts), cols, ts.ws_xpixel));
	SET_TTYSIZE(tty, ts);
    }
#endif /* USE_STRUCT_WINSIZE */

#ifdef USE_ANY_SYSV_TERMIO
    rc = ioctl(tty, TCSETAW, &tioorig);
#elif defined(USE_TERMIOS)
    rc = tcsetattr(tty, TCSADRAIN, &tioorig);
#else /* not USE_TERMIOS */
    rc = ioctl(tty, TIOCSETP, &sgorig);
#endif /* USE_ANY_SYSV_TERMIO/USE_TERMIOS */
    if (rc != 0)
	failed("set tty settings");

    signal(SIGINT, SIG_DFL);
    signal(SIGQUIT, SIG_DFL);
    signal(SIGTERM, SIG_DFL);

#ifdef USE_TERMCAP
    if (ok_tcap) {
	/* update termcap string */
	/* first do columns */
	if ((ptr = x_strindex(termcap, "co#")) == NULL) {
	    fprintf(stderr, "%s: No `co#'\n", myname);
	    exit(EXIT_FAILURE);
	}

	i = (int) (ptr - termcap) + 3;
	strncpy(newtc, termcap, (size_t) i);
	sprintf(newtc + i, "%d", cols);
	if ((ptr = strchr(ptr, ':')) != NULL)
	    strcat(newtc, ptr);

	/* now do lines */
	if ((ptr = x_strindex(newtc, "li#")) == NULL) {
	    fprintf(stderr, "%s: No `li#'\n", myname);
	    exit(EXIT_FAILURE);
	}

	i = (int) (ptr - newtc) + 3;
	strncpy(termcap, newtc, (size_t) i);
	sprintf(termcap + i, "%d", rows);
	if ((ptr = strchr(ptr, ':')) != NULL)
	    strcat(termcap, ptr);
    }
#endif /* USE_TERMCAP */

    if (SHELL_BOURNE == shell_type) {

#ifdef USE_TERMCAP
	if (ok_tcap) {
	    printf("%sTERMCAP=", setname);
	    print_termcap(termcap);
	    printf(";\nexport TERMCAP;\n");
	}
#endif /* USE_TERMCAP */
#ifdef USE_TERMINFO
	printf("%sCOLUMNS=%d;\nLINES=%d;\nexport COLUMNS LINES;\n",
	       setname, cols, rows);
#endif /* USE_TERMINFO */

    } else {			/* not Bourne shell */

#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(EXIT_SUCCESS);
}
IABSD.fr/xenocara/app/xterm/resize.c

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IABSD.fr/xenocara /app/xterm/resize.c
