progs/tput.c - platform/external/ncurses - Git at Google

 /****************************************************************************
  * Copyright 2018-2020,2021 Thomas E. Dickey                                *
  * Copyright 1998-2016,2017 Free Software Foundation, Inc.                  *
  *                                                                          *
  * 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, distribute with modifications, 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 COPYRIGHT HOLDERS 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.                                                           *
  ****************************************************************************/

 /****************************************************************************
  *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
  *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
  *     and: Thomas E. Dickey                        1996-on                 *
  ****************************************************************************/

 /*
  * tput.c -- shellscript access to terminal capabilities
  *
  * by Eric S. Raymond <esr@snark.thyrsus.com>, portions based on code from
  * Ross Ridge's mytinfo package.
  */

 #include <tparm_type.h>
 #include <clear_cmd.h>
 #include <reset_cmd.h>

 #include <transform.h>
 #include <tty_settings.h>

 MODULE_ID("$Id: tput.c,v 1.97 2021/10/02 18:09:23 tom Exp $")

 #define PUTS(s)		fputs(s, stdout)

 const char *_nc_progname = "tput";

 static bool is_init = FALSE;
 static bool is_reset = FALSE;
 static bool is_clear = FALSE;

 static GCC_NORETURN void
 quit(int status, const char *fmt, ...)
 {
     va_list argp;

     va_start(argp, fmt);
     fprintf(stderr, "%s: ", _nc_progname);
     vfprintf(stderr, fmt, argp);
     fprintf(stderr, "\n");
     va_end(argp);
     ExitProgram(status);
 }

 static GCC_NORETURN void
 usage(const char *optstring)
 {
 #define KEEP(s) s "\n"
     static const char msg[] =
     {
 	KEEP("")
 	KEEP("Options:")
 	KEEP("  -S <<       read commands from standard input")
 	KEEP("  -T TERM     use this instead of $TERM")
 	KEEP("  -V          print curses-version")
 	KEEP("  -x          do not try to clear scrollback")
 	KEEP("")
 	KEEP("Commands:")
 	KEEP("  clear       clear the screen")
 	KEEP("  init        initialize the terminal")
 	KEEP("  reset       reinitialize the terminal")
 	KEEP("  capname     unlike clear/init/reset, print value for capability \"capname\"")
     };
 #undef KEEP
     (void) fprintf(stderr, "Usage: %s [options] [command]\n", _nc_progname);
     if (optstring != NULL) {
 	const char *s = msg;
 	while (*s != '\0') {
 	    fputc(UChar(*s), stderr);
 	    if (!strncmp(s, "  -", 3)) {
 		if (strchr(optstring, s[3]) == NULL)
 		    s = strchr(s, '\n') + 1;
 	    } else if (!strncmp(s, "\n\nC", 3))
 		break;
 	    ++s;
 	}
     } else {
 	fputs(msg, stderr);
     }
     ExitProgram(ErrUsage);
 }

 static char *
 check_aliases(char *name, bool program)
 {
     static char my_init[] = "init";
     static char my_reset[] = "reset";
     static char my_clear[] = "clear";

     char *result = name;
     if ((is_init = same_program(name, program ? PROG_INIT : my_init)))
 	result = my_init;
     if ((is_reset = same_program(name, program ? PROG_RESET : my_reset)))
 	result = my_reset;
     if ((is_clear = same_program(name, program ? PROG_CLEAR : my_clear)))
 	result = my_clear;
     return result;
 }

 static int
 exit_code(int token, int value)
 {
     int result = 99;

     switch (token) {
     case BOOLEAN:
 	result = !value;	/* TRUE=0, FALSE=1 */
 	break;
     case NUMBER:
 	result = 0;		/* always zero */
 	break;
     case STRING:
 	result = value;		/* 0=normal, 1=missing */
 	break;
     }
     return result;
 }

 /*
  * Returns nonzero on error.
  */
 static int
 tput_cmd(int fd, TTY * settings, bool opt_x, int argc, char **argv, int *used)
 {
     NCURSES_CONST char *name;
     char *s;
     int status;
 #if !PURE_TERMINFO
     bool termcap = FALSE;
 #endif

     name = check_aliases(argv[0], FALSE);
     *used = 1;
     if (is_reset || is_init) {
 	TTY oldmode;

 	int terasechar = -1;	/* new erase character */
 	int intrchar = -1;	/* new interrupt character */
 	int tkillchar = -1;	/* new kill character */

 	if (is_reset) {
 	    reset_start(stdout, TRUE, FALSE);
 	    reset_tty_settings(fd, settings, FALSE);
 	} else {
 	    reset_start(stdout, FALSE, TRUE);
 	}

 #if HAVE_SIZECHANGE
 	set_window_size(fd, &lines, &columns);
 #else
 	(void) fd;
 #endif
 	set_control_chars(settings, terasechar, intrchar, tkillchar);
 	set_conversions(settings);
 	if (send_init_strings(fd, &oldmode)) {
 	    reset_flush();
 	}

 	update_tty_settings(&oldmode, settings);
 	return 0;
     }

     if (strcmp(name, "longname") == 0) {
 	PUTS(longname());
 	return 0;
     }
 #if !PURE_TERMINFO
   retry:
 #endif
     if (strcmp(name, "clear") == 0) {
 	return (clear_cmd(opt_x) == ERR) ? ErrUsage : 0;
     } else if ((status = tigetflag(name)) != -1) {
 	return exit_code(BOOLEAN, status);
     } else if ((status = tigetnum(name)) != CANCELLED_NUMERIC) {
 	(void) printf("%d\n", status);
 	return exit_code(NUMBER, 0);
     } else if ((s = tigetstr(name)) == CANCELLED_STRING) {
 #if !PURE_TERMINFO
 	if (!termcap) {
 	    const struct name_table_entry *np;

 	    termcap = TRUE;
 	    if ((np = _nc_find_entry(name, _nc_get_hash_table(termcap))) != 0) {
 		switch (np->nte_type) {
 		case BOOLEAN:
 		    name = boolnames[np->nte_index];
 		    break;

 		case NUMBER:
 		    name = numnames[np->nte_index];
 		    break;

 		case STRING:
 		    name = strnames[np->nte_index];
 		    break;
 		}
 		goto retry;
 	    }
 	}
 #endif
 	quit(ErrCapName, "unknown terminfo capability '%s'", name);
     } else if (VALID_STRING(s)) {
 	if (argc > 1) {
 	    int k;
 	    int analyzed;
 	    int popcount;
 	    long numbers[1 + NUM_PARM];
 	    char *strings[1 + NUM_PARM];
 	    char *p_is_s[NUM_PARM];
 	    TParams paramType;

 	    /* Nasty hack time. The tparm function needs to see numeric
 	     * parameters as numbers, not as pointers to their string
 	     * representations
 	     */

 	    for (k = 1; (k < argc) && (k <= NUM_PARM); k++) {
 		char *tmp = 0;
 		strings[k] = argv[k];
 		numbers[k] = strtol(argv[k], &tmp, 0);
 		if (tmp == 0 || *tmp != 0)
 		    numbers[k] = 0;
 	    }
 	    for (k = argc; k <= NUM_PARM; k++) {
 		numbers[k] = 0;
 		strings[k] = 0;
 	    }

 	    paramType = tparm_type(name);
 #if NCURSES_XNAMES
 	    /*
 	     * If the capability is an extended one, analyze the string.
 	     */
 	    if (paramType == Numbers) {
 		struct name_table_entry const *entry_ptr;
 		entry_ptr = _nc_find_type_entry(name, STRING, FALSE);
 		if (entry_ptr == NULL) {
 		    paramType = Other;
 		}
 	    }
 #endif

 	    popcount = 0;
 	    _nc_reset_tparm(NULL);
 	    switch (paramType) {
 	    case Num_Str:
 		s = TPARM_2(s, numbers[1], strings[2]);
 		analyzed = 2;
 		break;
 	    case Num_Str_Str:
 		s = TPARM_3(s, numbers[1], strings[2], strings[3]);
 		analyzed = 3;
 		break;
 	    case Numbers:
 		analyzed = _nc_tparm_analyze(NULL, s, p_is_s, &popcount);
 #define myParam(n) numbers[n]
 		s = TIPARM_9(s,
 			     myParam(1),
 			     myParam(2),
 			     myParam(3),
 			     myParam(4),
 			     myParam(5),
 			     myParam(6),
 			     myParam(7),
 			     myParam(8),
 			     myParam(9));
 #undef myParam
 		break;
 	    case Other:
 		/* FALLTHRU */
 	    default:
 		analyzed = _nc_tparm_analyze(NULL, s, p_is_s, &popcount);
 #define myParam(n) (p_is_s[n - 1] != 0 ? ((TPARM_ARG) strings[n]) : numbers[n])
 		s = TPARM_9(s,
 			    myParam(1),
 			    myParam(2),
 			    myParam(3),
 			    myParam(4),
 			    myParam(5),
 			    myParam(6),
 			    myParam(7),
 			    myParam(8),
 			    myParam(9));
 #undef myParam
 		break;
 	    }
 	    if (analyzed < popcount) {
 		analyzed = popcount;
 	    }
 	    *used += analyzed;
 	}

 	/* use putp() in order to perform padding */
 	putp(s);
 	return exit_code(STRING, 0);
     }
     return exit_code(STRING, 1);
 }

 int
 main(int argc, char **argv)
 {
     char *term;
     int errret;
     bool cmdline = TRUE;
     int c;
     char buf[BUFSIZ];
     int result = 0;
     int fd;
     int used;
     TTY tty_settings;
     bool opt_x = FALSE;		/* clear scrollback if possible */
     bool is_alias;
     bool need_tty;

     _nc_progname = check_aliases(_nc_rootname(argv[0]), TRUE);
     is_alias = (is_clear || is_reset || is_init);

     term = getenv("TERM");

     while ((c = getopt(argc, argv, is_alias ? "T:Vx" : "ST:Vx")) != -1) {
 	switch (c) {
 	case 'S':
 	    cmdline = FALSE;
 	    break;
 	case 'T':
 	    use_env(FALSE);
 	    use_tioctl(TRUE);
 	    term = optarg;
 	    break;
 	case 'V':
 	    puts(curses_version());
 	    ExitProgram(EXIT_SUCCESS);
 	case 'x':		/* do not try to clear scrollback */
 	    opt_x = TRUE;
 	    break;
 	default:
 	    usage(is_alias ? "TVx" : NULL);
 	    /* NOTREACHED */
 	}
     }

     need_tty = ((is_reset || is_init) ||
 		(optind < argc &&
 		 (!strcmp(argv[optind], "reset") ||
 		  !strcmp(argv[optind], "init"))));

     /*
      * Modify the argument list to omit the options we processed.
      */
     if (is_alias) {
 	if (optind-- < argc) {
 	    argc -= optind;
 	    argv += optind;
 	}
 	argv[0] = strdup(_nc_progname);
     } else {
 	argc -= optind;
 	argv += optind;
     }

     if (term == 0 || *term == '\0')
 	quit(ErrUsage, "No value for $TERM and no -T specified");

     fd = save_tty_settings(&tty_settings, need_tty);

     if (setupterm(term, fd, &errret) != OK && errret <= 0)
 	quit(ErrTermType, "unknown terminal \"%s\"", term);

     if (cmdline) {
 	int code = 0;
 	if ((argc <= 0) && !is_alias)
 	    usage(NULL);
 	while (argc > 0) {
 	    code = tput_cmd(fd, &tty_settings, opt_x, argc, argv, &used);
 	    if (code != 0)
 		break;
 	    argc -= used;
 	    argv += used;
 	}
 	ExitProgram(code);
     }

     while (fgets(buf, sizeof(buf), stdin) != 0) {
 	size_t need = strlen(buf);
 	char **argvec = typeCalloc(char *, need + 1);
 	char **argnow;
 	int argnum = 0;
 	char *cp;

 	if (argvec == NULL) {
 	    quit(ErrSystem(1), strerror(errno));
 	}

 	/* split the buffer into tokens */
 	for (cp = buf; *cp; cp++) {
 	    if (isspace(UChar(*cp))) {
 		*cp = '\0';
 	    } else if (cp == buf || cp[-1] == '\0') {
 		argvec[argnum++] = cp;
 		if (argnum >= (int) need)
 		    break;
 	    }
 	}

 	argnow = argvec;
 	while (argnum > 0) {
 	    int code = tput_cmd(fd, &tty_settings, opt_x, argnum, argnow, &used);
 	    if (code != 0) {
 		if (result == 0)
 		    result = ErrSystem(0);	/* will return value >4 */
 		++result;
 	    }
 	    argnum -= used;
 	    argnow += used;
 	}
 	free(argvec);
     }

     ExitProgram(result);
 }
	/****************************************************************************
	* Copyright 2018-2020,2021 Thomas E. Dickey *
	* Copyright 1998-2016,2017 Free Software Foundation, Inc. *
	* *
	* 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, distribute with modifications, 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 COPYRIGHT HOLDERS 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. *
	****************************************************************************/

	/****************************************************************************
	* Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
	* and: Eric S. Raymond <esr@snark.thyrsus.com> *
	* and: Thomas E. Dickey 1996-on *
	****************************************************************************/

	/*
	* tput.c -- shellscript access to terminal capabilities
	*
	* by Eric S. Raymond <esr@snark.thyrsus.com>, portions based on code from
	* Ross Ridge's mytinfo package.
	*/

	#include <tparm_type.h>
	#include <clear_cmd.h>
	#include <reset_cmd.h>

	#include <transform.h>
	#include <tty_settings.h>

	MODULE_ID("$Id: tput.c,v 1.97 2021/10/02 18:09:23 tom Exp $")

	#define PUTS(s) fputs(s, stdout)

	const char *_nc_progname = "tput";

	static bool is_init = FALSE;
	static bool is_reset = FALSE;
	static bool is_clear = FALSE;

	static GCC_NORETURN void
	quit(int status, const char *fmt, ...)
	{
	va_list argp;

	va_start(argp, fmt);
	fprintf(stderr, "%s: ", _nc_progname);
	vfprintf(stderr, fmt, argp);
	fprintf(stderr, "\n");
	va_end(argp);
	ExitProgram(status);
	}

	static GCC_NORETURN void
	usage(const char *optstring)
	{
	#define KEEP(s) s "\n"
	static const char msg[] =
	{
	KEEP("")
	KEEP("Options:")
	KEEP(" -S << read commands from standard input")
	KEEP(" -T TERM use this instead of $TERM")
	KEEP(" -V print curses-version")
	KEEP(" -x do not try to clear scrollback")
	KEEP("")
	KEEP("Commands:")
	KEEP(" clear clear the screen")
	KEEP(" init initialize the terminal")
	KEEP(" reset reinitialize the terminal")
	KEEP(" capname unlike clear/init/reset, print value for capability \"capname\"")
	};
	#undef KEEP
	(void) fprintf(stderr, "Usage: %s [options] [command]\n", _nc_progname);
	if (optstring != NULL) {
	const char *s = msg;
	while (*s != '\0') {
	fputc(UChar(*s), stderr);
	if (!strncmp(s, " -", 3)) {
	if (strchr(optstring, s[3]) == NULL)
	s = strchr(s, '\n') + 1;
	} else if (!strncmp(s, "\n\nC", 3))
	break;
	++s;
	}
	} else {
	fputs(msg, stderr);
	}
	ExitProgram(ErrUsage);
	}

	static char *
	check_aliases(char *name, bool program)
	{
	static char my_init[] = "init";
	static char my_reset[] = "reset";
	static char my_clear[] = "clear";

	char *result = name;
	if ((is_init = same_program(name, program ? PROG_INIT : my_init)))
	result = my_init;
	if ((is_reset = same_program(name, program ? PROG_RESET : my_reset)))
	result = my_reset;
	if ((is_clear = same_program(name, program ? PROG_CLEAR : my_clear)))
	result = my_clear;
	return result;
	}

	static int
	exit_code(int token, int value)
	{
	int result = 99;

	switch (token) {
	case BOOLEAN:
	result = !value; /* TRUE=0, FALSE=1 */
	break;
	case NUMBER:
	result = 0; /* always zero */
	break;
	case STRING:
	result = value; /* 0=normal, 1=missing */
	break;
	}
	return result;
	}

	/*
	* Returns nonzero on error.
	*/
	static int
	tput_cmd(int fd, TTY * settings, bool opt_x, int argc, char *argv, int used)
	{
	NCURSES_CONST char *name;
	char *s;
	int status;
	#if !PURE_TERMINFO
	bool termcap = FALSE;
	#endif

	name = check_aliases(argv[0], FALSE);
	*used = 1;
	if (is_reset \|\| is_init) {
	TTY oldmode;

	int terasechar = -1; /* new erase character */
	int intrchar = -1; /* new interrupt character */
	int tkillchar = -1; /* new kill character */

	if (is_reset) {
	reset_start(stdout, TRUE, FALSE);
	reset_tty_settings(fd, settings, FALSE);
	} else {
	reset_start(stdout, FALSE, TRUE);
	}

	#if HAVE_SIZECHANGE
	set_window_size(fd, &lines, &columns);
	#else
	(void) fd;
	#endif
	set_control_chars(settings, terasechar, intrchar, tkillchar);
	set_conversions(settings);
	if (send_init_strings(fd, &oldmode)) {
	reset_flush();
	}

	update_tty_settings(&oldmode, settings);
	return 0;
	}

	if (strcmp(name, "longname") == 0) {
	PUTS(longname());
	return 0;
	}
	#if !PURE_TERMINFO
	retry:
	#endif
	if (strcmp(name, "clear") == 0) {
	return (clear_cmd(opt_x) == ERR) ? ErrUsage : 0;
	} else if ((status = tigetflag(name)) != -1) {
	return exit_code(BOOLEAN, status);
	} else if ((status = tigetnum(name)) != CANCELLED_NUMERIC) {
	(void) printf("%d\n", status);
	return exit_code(NUMBER, 0);
	} else if ((s = tigetstr(name)) == CANCELLED_STRING) {
	#if !PURE_TERMINFO
	if (!termcap) {
	const struct name_table_entry *np;

	termcap = TRUE;
	if ((np = _nc_find_entry(name, _nc_get_hash_table(termcap))) != 0) {
	switch (np->nte_type) {
	case BOOLEAN:
	name = boolnames[np->nte_index];
	break;

	case NUMBER:
	name = numnames[np->nte_index];
	break;

	case STRING:
	name = strnames[np->nte_index];
	break;
	}
	goto retry;
	}
	}
	#endif
	quit(ErrCapName, "unknown terminfo capability '%s'", name);
	} else if (VALID_STRING(s)) {
	if (argc > 1) {
	int k;
	int analyzed;
	int popcount;
	long numbers[1 + NUM_PARM];
	char *strings[1 + NUM_PARM];
	char *p_is_s[NUM_PARM];
	TParams paramType;

	/* Nasty hack time. The tparm function needs to see numeric
	* parameters as numbers, not as pointers to their string
	* representations
	*/

	for (k = 1; (k < argc) && (k <= NUM_PARM); k++) {
	char *tmp = 0;
	strings[k] = argv[k];
	numbers[k] = strtol(argv[k], &tmp, 0);
	if (tmp == 0 \|\| *tmp != 0)
	numbers[k] = 0;
	}
	for (k = argc; k <= NUM_PARM; k++) {
	numbers[k] = 0;
	strings[k] = 0;
	}

	paramType = tparm_type(name);
	#if NCURSES_XNAMES
	/*
	* If the capability is an extended one, analyze the string.
	*/
	if (paramType == Numbers) {
	struct name_table_entry const *entry_ptr;
	entry_ptr = _nc_find_type_entry(name, STRING, FALSE);
	if (entry_ptr == NULL) {
	paramType = Other;
	}
	}
	#endif

	popcount = 0;
	_nc_reset_tparm(NULL);
	switch (paramType) {
	case Num_Str:
	s = TPARM_2(s, numbers[1], strings[2]);
	analyzed = 2;
	break;
	case Num_Str_Str:
	s = TPARM_3(s, numbers[1], strings[2], strings[3]);
	analyzed = 3;
	break;
	case Numbers:
	analyzed = _nc_tparm_analyze(NULL, s, p_is_s, &popcount);
	#define myParam(n) numbers[n]
	s = TIPARM_9(s,
	myParam(1),
	myParam(2),
	myParam(3),
	myParam(4),
	myParam(5),
	myParam(6),
	myParam(7),
	myParam(8),
	myParam(9));
	#undef myParam
	break;
	case Other:
	/* FALLTHRU */
	default:
	analyzed = _nc_tparm_analyze(NULL, s, p_is_s, &popcount);
	#define myParam(n) (p_is_s[n - 1] != 0 ? ((TPARM_ARG) strings[n]) : numbers[n])
	s = TPARM_9(s,
	myParam(1),
	myParam(2),
	myParam(3),
	myParam(4),
	myParam(5),
	myParam(6),
	myParam(7),
	myParam(8),
	myParam(9));
	#undef myParam
	break;
	}
	if (analyzed < popcount) {
	analyzed = popcount;
	}
	*used += analyzed;
	}

	/* use putp() in order to perform padding */
	putp(s);
	return exit_code(STRING, 0);
	}
	return exit_code(STRING, 1);
	}

	int
	main(int argc, char **argv)
	{
	char *term;
	int errret;
	bool cmdline = TRUE;
	int c;
	char buf[BUFSIZ];
	int result = 0;
	int fd;
	int used;
	TTY tty_settings;
	bool opt_x = FALSE; /* clear scrollback if possible */
	bool is_alias;
	bool need_tty;

	_nc_progname = check_aliases(_nc_rootname(argv[0]), TRUE);
	is_alias = (is_clear \|\| is_reset \|\| is_init);

	term = getenv("TERM");

	while ((c = getopt(argc, argv, is_alias ? "T:Vx" : "ST:Vx")) != -1) {
	switch (c) {
	case 'S':
	cmdline = FALSE;
	break;
	case 'T':
	use_env(FALSE);
	use_tioctl(TRUE);
	term = optarg;
	break;
	case 'V':
	puts(curses_version());
	ExitProgram(EXIT_SUCCESS);
	case 'x': /* do not try to clear scrollback */
	opt_x = TRUE;
	break;
	default:
	usage(is_alias ? "TVx" : NULL);
	/* NOTREACHED */
	}
	}

	need_tty = ((is_reset \|\| is_init) \|\|
	(optind < argc &&
	(!strcmp(argv[optind], "reset") \|\|
	!strcmp(argv[optind], "init"))));

	/*
	* Modify the argument list to omit the options we processed.
	*/
	if (is_alias) {
	if (optind-- < argc) {
	argc -= optind;
	argv += optind;
	}
	argv[0] = strdup(_nc_progname);
	} else {
	argc -= optind;
	argv += optind;
	}

	if (term == 0 \|\| *term == '\0')
	quit(ErrUsage, "No value for $TERM and no -T specified");

	fd = save_tty_settings(&tty_settings, need_tty);

	if (setupterm(term, fd, &errret) != OK && errret <= 0)
	quit(ErrTermType, "unknown terminal \"%s\"", term);

	if (cmdline) {
	int code = 0;
	if ((argc <= 0) && !is_alias)
	usage(NULL);
	while (argc > 0) {
	code = tput_cmd(fd, &tty_settings, opt_x, argc, argv, &used);
	if (code != 0)
	break;
	argc -= used;
	argv += used;
	}
	ExitProgram(code);
	}

	while (fgets(buf, sizeof(buf), stdin) != 0) {
	size_t need = strlen(buf);
	char *argvec = typeCalloc(char , need + 1);
	char **argnow;
	int argnum = 0;
	char *cp;

	if (argvec == NULL) {
	quit(ErrSystem(1), strerror(errno));
	}

	/* split the buffer into tokens */
	for (cp = buf; *cp; cp++) {
	if (isspace(UChar(*cp))) {
	*cp = '\0';
	} else if (cp == buf \|\| cp[-1] == '\0') {
	argvec[argnum++] = cp;
	if (argnum >= (int) need)
	break;
	}
	}

	argnow = argvec;
	while (argnum > 0) {
	int code = tput_cmd(fd, &tty_settings, opt_x, argnum, argnow, &used);
	if (code != 0) {
	if (result == 0)
	result = ErrSystem(0); /* will return value >4 */
	++result;
	}
	argnum -= used;
	argnow += used;
	}
	free(argvec);
	}

	ExitProgram(result);
	}