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xenocara/app/xterm/resize.c

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/* $XTermId: resize.c,v 1.111 2010/04/18 16:35:02 tom Exp $ */
/*
* Copyright 2003-2009,2010 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 <xterm.h>
#include <stdio.h>
#include <ctype.h>
#include <xstrings.h>
#include <xtermcap.h>
#include <xterm_io.h>
#ifdef APOLLO_SR9
#define CANT_OPEN_DEV_TTY
#endif
#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
#ifdef X_NOT_POSIX
#if !defined(SYSV) && !defined(i386)
extern struct passwd *getpwuid(); /* does ANYBODY need this? */
#endif /* SYSV && i386 */
#endif /* X_NOT_POSIX */
#ifdef __MVS__
#define ESCAPE(string) "\047" string
#else
#define ESCAPE(string) "\033" string
#endif
#define EMULATIONS 2
#define SUN 1
#define VT100 0
#define TIMEOUT 10
#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 */
{ "tcsh", SHELL_C },
{ "jcsh", SHELL_C },
{ "sh", SHELL_BOURNE }, /* vanilla Bourne shell */
{ "ksh", SHELL_BOURNE }, /* Korn shell (from AT&T toolchest) */
{ "ksh-i", SHELL_BOURNE }, /* other name for latest Korn shell */
{ "bash", SHELL_BOURNE }, /* GNU Bourne again shell */
{ "jsh", SHELL_BOURNE },
{ NULL, SHELL_BOURNE } /* default (same as xterm's) */
};
/* *INDENT-ON* */
static const char *emuname[EMULATIONS] =
{
"VT100",
"Sun",
};
static char *myname;
static int shell_type = SHELL_UNKNOWN;
static const char *getsize[EMULATIONS] =
{
ESCAPE("7") ESCAPE("[r") ESCAPE("[999;999H") ESCAPE("[6n"),
ESCAPE("[18t"),
};
#if defined(USE_STRUCT_TTYSIZE)
#elif defined(USE_STRUCT_WINSIZE)
static const char *getwsize[EMULATIONS] =
{ /* size in pixels */
0,
ESCAPE("[14t"),
};
#endif /* USE_STRUCT_{TTYSIZE|WINSIZE} */
static const char *restore[EMULATIONS] =
{
ESCAPE("8"),
0,
};
static const char *setname = "";
static const char *setsize[EMULATIONS] =
{
0,
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 *size[EMULATIONS] =
{
ESCAPE("[%d;%dR"),
ESCAPE("[8;%d;%dt"),
};
static char sunname[] = "sunsize";
static int tty;
static FILE *ttyfp;
#if defined(USE_STRUCT_TTYSIZE)
#elif defined(USE_STRUCT_WINSIZE)
static const char *wsize[EMULATIONS] =
{
0,
ESCAPE("[4;%hd;%hdt"),
};
#endif /* USE_STRUCT_{TTYSIZE|WINSIZE} */
static SIGNAL_T onintr(int sig);
static SIGNAL_T resize_timeout(int sig);
static int checkdigits(char *str);
static void Usage(void);
static void readstring(FILE *fp, char *buf, const char *str);
#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 */
/*
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;
struct passwd *pw;
int i;
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
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;
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) &&
(((pw = getpwuid(getuid())) == NULL) ||
*(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(1);
}
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(1);
}
tty = fileno(ttyfp);
#ifdef USE_TERMCAP
if ((env = x_getenv("TERM")) == 0) {
env = 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") == 0) {
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
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)
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 */
ioctl(tty, TIOCGETP, &sgorig);
sg = sgorig;
sg.sg_flags |= RAW;
UIntClr(sg.sg_flags, ECHO);
#endif /* USE_ANY_SYSV_TERMIO/USE_TERMIOS */
signal(SIGINT, onintr);
signal(SIGQUIT, onintr);
signal(SIGTERM, onintr);
#ifdef USE_ANY_SYSV_TERMIO
ioctl(tty, TCSETAW, &tio);
#elif defined(USE_TERMIOS)
tcsetattr(tty, TCSADRAIN, &tio);
#else /* not USE_TERMIOS */
ioctl(tty, TIOCSETP, &sg);
#endif /* USE_ANY_SYSV_TERMIO/USE_TERMIOS */
if (argc == 2) {
char *tmpbuf = TypeMallocN(char,
strlen(setsize[emu]) +
strlen(argv[0]) +
strlen(argv[1]) +
1);
if (tmpbuf == 0) {
fprintf(stderr, "%s: Cannot query size\n", myname);
onintr(0);
}
sprintf(tmpbuf, setsize[emu], argv[0], argv[1]);
IGNORE_RC(write(tty, tmpbuf, strlen(tmpbuf)));
free(tmpbuf);
}
IGNORE_RC(write(tty, getsize[emu], strlen(getsize[emu])));
readstring(ttyfp, buf, size[emu]);
if (sscanf(buf, 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_TTYSIZE)
/* finally, set the tty's window size */
if (ioctl(tty, TIOCGSIZE, &ts) != -1) {
TTYSIZE_ROWS(ts) = rows;
TTYSIZE_COLS(ts) = cols;
SET_TTYSIZE(tty, ts);
}
#elif 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);
}
TTYSIZE_ROWS(ts) = rows;
TTYSIZE_COLS(ts) = cols;
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... */
if (TTYSIZE_COLS(ts) != 0)
ts.ws_xpixel = cols * (ts.ws_xpixel / TTYSIZE_COLS(ts));
if (TTYSIZE_ROWS(ts) != 0)
ts.ws_ypixel = rows * (ts.ws_ypixel / TTYSIZE_ROWS(ts));
TTYSIZE_ROWS(ts) = rows;
TTYSIZE_COLS(ts) = cols;
SET_TTYSIZE(tty, ts);
}
#endif /* USE_STRUCT_{TTYSIZE|WINSIZE} */
#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 */
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(1);
}
i = ptr - termcap + 3;
strncpy(newtc, termcap, (size_t) i);
sprintf(newtc + i, "%d", cols);
ptr = strchr(ptr, ':');
strcat(newtc, ptr);
/* now do lines */
if ((ptr = x_strindex(newtc, "li#")) == NULL) {
fprintf(stderr, "%s: No `li#'\n", myname);
exit(1);
}
i = ptr - newtc + 3;
strncpy(termcap, newtc, (size_t) i);
sprintf(termcap + i, "%d", rows);
ptr = strchr(ptr, ':');
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(0);
}
static int
checkdigits(char *str)
{
while (*str) {
if (!isdigit(CharOf(*str)))
return (0);
str++;
}
return (1);
}
static void
readstring(FILE *fp, char *buf, const 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);
}
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