setterm: convert various constant number definitions to enums

[thirdparty/util-linux.git] / term-utils / setterm.c

/* setterm.c, set terminal attributes.
 *
 * Copyright (C) 1990 Gordon Irlam (gordoni@cs.ua.oz.au).  Conditions of use,
 * modification, and redistribution are contained in the file COPYRIGHT that
 * forms part of this distribution.
 * 
 * Adaption to Linux by Peter MacDonald.
 *
 * Enhancements by Mika Liljeberg (liljeber@cs.Helsinki.FI)
 *
 * Beep modifications by Christophe Jolif (cjolif@storm.gatelink.fr.net)
 *
 * Sanity increases by Cafeine Addict [sic].
 *
 * Powersave features by todd j. derr <tjd@wordsmith.org>
 *
 * Converted to terminfo by Kars de Jong (jongk@cs.utwente.nl)
 *
 * 1999-02-22 Arkadiusz Miśkiewicz <misiek@pld.ORG.PL>
 * - added Native Language Support
 *
 *
 * Syntax:
 *
 * setterm
 *   [ -term terminal_name ]
 *   [ -reset ]
 *   [ -initialize ]
 *   [ -cursor [on|off] ]
 *   [ -repeat [on|off] ]
 *   [ -appcursorkeys [on|off] ]
 *   [ -linewrap [on|off] ]
 *   [ -snow [on|off] ]
 *   [ -softscroll [on|off] ]
 *   [ -defaults ]
 *   [ -foreground black|red|green|yellow|blue|magenta|cyan|white|default ]
 *   [ -background black|red|green|yellow|blue|magenta|cyan|white|default ]
 *   [ -ulcolor black|grey|red|green|yellow|blue|magenta|cyan|white ]
 *   [ -ulcolor bright red|green|yellow|blue|magenta|cyan|white ]
 *   [ -hbcolor black|grey|red|green|yellow|blue|magenta|cyan|white ]
 *   [ -hbcolor bright red|green|yellow|blue|magenta|cyan|white ]
 *   [ -inversescreen [on|off] ]
 *   [ -bold [on|off] ]
 *   [ -half-bright [on|off] ]
 *   [ -blink [on|off] ]
 *   [ -reverse [on|off] ]
 *   [ -underline [on|off] ]
 *   [ -store ]
 *   [ -clear [ all|rest ] ]
 *   [ -tabs [tab1 tab2 tab3 ... ] ]     (tabn = 1-160)
 *   [ -clrtabs [ tab1 tab2 tab3 ... ]   (tabn = 1-160)
 *   [ -regtabs [1-160] ]
 *   [ -blank [0-60|force|poke|] ]
 *   [ -dump   [1-NR_CONS ] ]
 *   [ -append [1-NR_CONS ] ]
 *   [ -file dumpfilename ]
 *   [ -standout [attr] ]
 *   [ -msg [on|off] ]
 *   [ -msglevel [0-8] ]
 *   [ -powersave [on|vsync|hsync|powerdown|off] ]
 *   [ -powerdown [0-60] ]
 *   [ -blength [0-2000] ]
 *   [ -bfreq freq ]
 *   [ -version ]
 *   [ -help ]
 *
 *
 * Semantics:
 *
 * Setterm writes to standard output a character string that will
 * invoke the specified terminal capabilities.  Where possible
 * terminfo is consulted to find the string to use.  Some options
 * however do not correspond to a terminfo capability.  In this case if
 * the terminal type is "con*", or "linux*" the string that invokes
 * the specified capabilities on the PC Linux virtual console driver
 * is output.  Options that are not implemented by the terminal are
 * ignored.
 *
 * The following options are non-obvious.
 *
 *   -term can be used to override the TERM environment variable.
 *
 *   -reset displays the terminal reset string, which typically resets the
 *      terminal to its power on state.
 *
 *   -initialize displays the terminal initialization string, which typically
 *      sets the terminal's rendering options, and other attributes to the
 *      default values.
 *
 *   -default sets the terminal's rendering options to the default values.
 *
 *   -store stores the terminal's current rendering options as the default
 *      values.  */

#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <ctype.h>
#include <unistd.h>
#include <termios.h>
#include <string.h>
#include <fcntl.h>

#ifndef NCURSES_CONST
#define NCURSES_CONST const	/* define before including term.h */
#endif
#ifdef HAVE_NCURSES_H
#include <ncurses.h>
#elif defined(HAVE_NCURSES_NCURSES_H)
#include <ncurses/ncurses.h>
#endif
/* must include after ncurses.h */
#include <term.h>

#include <sys/param.h>		/* for MAXPATHLEN */
#include <sys/ioctl.h>
#include <sys/time.h>
#ifdef HAVE_LINUX_TIOCL_H
#include <linux/tiocl.h>
#endif

#include "c.h"
#include "xalloc.h"
#include "nls.h"
#include "closestream.h"

#if defined(__GNU_LIBRARY__) && __GNU_LIBRARY__ < 5
#ifndef __alpha__
# include <linux/unistd.h>
#define __NR_klogctl __NR_syslog
_syscall3(int, klogctl, int, type, char*, buf, int, len);
#else /* __alpha__ */
#define klogctl syslog
#endif
#endif
extern int klogctl(int type, char *buf, int len);

/* Constants. */

/* Non-standard return values. */
#define EXIT_DUMPFILE	-1

/* Colors. */
enum {
	BLACK = 0,
	RED,
	GREEN,
	YELLOW,
	BLUE,
	MAGENTA,
	CYAN,
	WHITE,
	GREY,
	DEFAULT
};

/* Blank commands */
enum {
	BLANKSCREEN	= -1,
	UNBLANKSCREEN	= -2,
	BLANKEDSCREEN	= -3
};

/* <linux/tiocl.h> fallback */
#ifndef TIOCL_BLANKSCREEN
enum {
	TIOCL_UNBLANKSCREEN	=  4,	/* unblank screen */
	TIOCL_SETVESABLANK	= 10,	/* set vesa blanking mode */
	TIOCL_BLANKSCREEN	= 14,	/* keep screen blank even if a key is pressed */
	TIOCL_BLANKEDSCREEN	= 15	/* return which vt was blanked */
};
#endif

/* Option flags.  Set if the option is to be invoked. */
int opt_term, opt_reset, opt_initialize, opt_cursor;
int opt_linewrap, opt_default, opt_foreground;
int opt_background, opt_bold, opt_blink, opt_reverse, opt_underline;
int opt_store, opt_clear, opt_blank, opt_snap, opt_snapfile;
int opt_append, opt_ulcolor, opt_hbcolor, opt_halfbright, opt_repeat;
int opt_tabs, opt_clrtabs, opt_regtabs, opt_appcursorkeys, opt_inversescreen;
int opt_msg, opt_msglevel, opt_powersave, opt_powerdown;
int opt_blength, opt_bfreq;

/* Option controls.  The variable names have been contracted to ensure
 * uniqueness.
 */
char *opt_te_terminal_name;	/* Terminal name. */
int opt_cu_on, opt_li_on, opt_bo_on, opt_hb_on, opt_bl_on;
int opt_re_on, opt_un_on, opt_rep_on, opt_appck_on, opt_invsc_on;
int opt_msg_on;			/* Boolean switches. */
int opt_fo_color, opt_ba_color;	/* Colors. */
int opt_ul_color, opt_hb_color;
int opt_cl_all;			/* Clear all or rest. */
int opt_bl_min;			/* Blank screen. */
int opt_blength_l;
int opt_bfreq_f;
int opt_sn_num;			/* Snap screen. */
int opt_rt_len;			/* regular tab length */
int opt_tb_array[161];		/* Array for tab list */
int opt_msglevel_num;
int opt_ps_mode, opt_pd_min;	/* powersave mode/powerdown time */

char opt_sn_name[PATH_MAX + 1] = "screen.dump";

static void screendump(int vcnum, FILE *F);

/* Command line parsing routines.
 *
 * Note that it is an error for a given option to be invoked more than once.
 */

static void
parse_term(int argc, char **argv, int *option, char **ttyname, int *bad_arg) {
	/* argc: Number of arguments for this option. */
	/* argv: Arguments for this option. */
	/* option: Term flag to set. */
	/* ttyname: Terminal name to set. */
	/* bad_arg: Set to true if an error is detected. */

/* Parse a -term specification. */

	if (argc != 1 || *option)
		*bad_arg = TRUE;
	*option = TRUE;
	if (argc == 1)
		*ttyname = argv[0];
}

static void
parse_none(int argc, char **argv __attribute__ ((__unused__)), int *option, int *bad_arg) {
	/* argc: Number of arguments for this option. */
	/* argv: Arguments for this option. */
	/* option: Term flag to set. */
	/* bad_arg: Set to true if an error is detected. */

/* Parse a parameterless specification. */

	if (argc != 0 || *option)
		*bad_arg = TRUE;
	*option = TRUE;
}

static void
parse_switch(int argc, char **argv, int *option, int *opt_on, int *bad_arg) {
	/* argc: Number of arguments for this option. */
	/* argv: Arguments for this option. */
	/* option: Option flag to set. */
	/* opt_on: Boolean option switch to set or reset. */
	/* bad_arg: Set to true if an error is detected. */

/* Parse a boolean (on/off) specification. */

	if (argc > 1 || *option)
		*bad_arg = TRUE;
	*option = TRUE;
	if (argc == 1) {
		if (strcmp(argv[0], "on") == 0)
			*opt_on = TRUE;
		else if (strcmp(argv[0], "off") == 0)
			*opt_on = FALSE;
		else
			*bad_arg = TRUE;
	} else {
		*opt_on = TRUE;
	}
}

static void
par_color(int argc, char **argv, int *option, int *opt_color, int *bad_arg) {
	/* argc: Number of arguments for this option. */
	/* argv: Arguments for this option. */
	/* option: Color flag to set. */
	/* opt_color: Color to set. */
	/* bad_arg: Set to true if an error is detected. */

/* Parse a -foreground or -background specification. */

	if (argc != 1 || *option)
		*bad_arg = TRUE;
	*option = TRUE;
	if (argc == 1) {
		if (strcmp(argv[0], "black") == 0)
			*opt_color = BLACK;
		else if (strcmp(argv[0], "red") == 0)
			*opt_color = RED;
		else if (strcmp(argv[0], "green") == 0)
			*opt_color = GREEN;
		else if (strcmp(argv[0], "yellow") == 0)
			*opt_color = YELLOW;
		else if (strcmp(argv[0], "blue") == 0)
			*opt_color = BLUE;
		else if (strcmp(argv[0], "magenta") == 0)
			*opt_color = MAGENTA;
		else if (strcmp(argv[0], "cyan") == 0)
			*opt_color = CYAN;
		else if (strcmp(argv[0], "white") == 0)
			*opt_color = WHITE;
		else if (strcmp(argv[0], "default") == 0)
			*opt_color = DEFAULT;
		else if (isdigit(argv[0][0]))
			*opt_color = atoi(argv[0]);
		else
			*bad_arg = TRUE;

		if(*opt_color < BLACK || DEFAULT < *opt_color || *opt_color == GREY)
			*bad_arg = TRUE;
	}
}

static void
par_color2(int argc, char **argv, int *option, int *opt_color, int *bad_arg) {
	/* argc: Number of arguments for this option. */
	/* argv: Arguments for this option. */
	/* option: Color flag to set. */
	/* opt_color: Color to set. */
	/* bad_arg: Set to true if an error is detected. */

/* Parse a -ulcolor or -hbcolor specification. */

	if (!argc || argc > 2 || *option)
		*bad_arg = TRUE;
	*option = TRUE;
	*opt_color = 0;
	if (argc == 2) {
		if (strcmp(argv[0], "bright") == 0)
			*opt_color = GREY;
		else {
			*bad_arg = TRUE;
			return;
		}
	}
	if (argc) {
		if (strcmp(argv[argc-1], "black") == 0) {
			if(*opt_color)
				*bad_arg = TRUE;
			else
				*opt_color = BLACK;
		} else if (strcmp(argv[argc-1], "grey") == 0) {
			if(*opt_color)
				*bad_arg = TRUE;
			else
				*opt_color = GREY;
		} else if (strcmp(argv[argc-1], "red") == 0)
			*opt_color |= RED;
		else if (strcmp(argv[argc-1], "green") == 0)
			*opt_color |= GREEN;
		else if (strcmp(argv[argc-1], "yellow") == 0)
			*opt_color |= YELLOW;
		else if (strcmp(argv[argc-1], "blue") == 0)
			*opt_color |= BLUE;
		else if (strcmp(argv[argc-1], "magenta") == 0)
			*opt_color |= MAGENTA;
		else if (strcmp(argv[argc-1], "cyan") == 0)
			*opt_color |= CYAN;
		else if (strcmp(argv[argc-1], "white") == 0)
			*opt_color |= WHITE;
		else if (isdigit(argv[argc-1][0]))
			*opt_color = atoi(argv[argc-1]);
		else
			*bad_arg = TRUE;
		if(*opt_color < BLACK || DEFAULT < *opt_color )
			*bad_arg = TRUE;
	}
}

static void
parse_clear(int argc, char **argv, int *option, int *opt_all, int *bad_arg) {
	/* argc: Number of arguments for this option. */
	/* argv: Arguments for this option. */
	/* option: Clear flag to set. */
	/* opt_all: Clear all switch to set or reset. */
	/* bad_arg: Set to true if an error is detected. */

/* Parse a -clear specification. */

	if (argc > 1 || *option)
		*bad_arg = TRUE;
	*option = TRUE;
	if (argc == 1) {
		if (strcmp(argv[0], "all") == 0)
			*opt_all = TRUE;
		else if (strcmp(argv[0], "rest") == 0)
			*opt_all = FALSE;
		else
			*bad_arg = TRUE;
	} else {
		*opt_all = TRUE;
	}
}

static void
parse_blank(int argc, char **argv, int *option, int *opt_all, int *bad_arg) {
	/* argc: Number of arguments for this option. */
	/* argv: Arguments for this option. */
	/* option: Clear flag to set. */
	/* opt_all: Clear all switch to set or reset. */
	/* bad_arg: Set to true if an error is detected. */

/* Parse a -blank specification. */

	if (argc > 1 || *option)
		*bad_arg = TRUE;
	*option = TRUE;
	if (argc == 1) {
		if (!strcmp(argv[0], "force"))
			*opt_all = BLANKSCREEN;
		else if (!strcmp(argv[0], "poke"))
			*opt_all = UNBLANKSCREEN;
		else {
			*opt_all = atoi(argv[0]);
			if ((*opt_all > 60) || (*opt_all < 0))
				*bad_arg = TRUE;
		}
	} else {
		*opt_all = BLANKEDSCREEN;
	}
}

static void
parse_powersave(int argc, char **argv, int *option, int *opt_mode, int *bad_arg) {
	/* argc: Number of arguments for this option. */
	/* argv: Arguments for this option. */
	/* option: powersave flag to set. */
	/* opt_mode: Powersaving mode, defined in vesa_blank.c */
	/* bad_arg: Set to true if an error is detected. */

/* Parse a -powersave mode specification. */

	if (argc > 1 || *option)
		*bad_arg = TRUE;
	*option = TRUE;
	if (argc == 1) {
		if (strcmp(argv[0], "on") == 0)
			*opt_mode = 1;
		else if (strcmp(argv[0], "vsync") == 0)
			*opt_mode = 1;
		else if (strcmp(argv[0], "hsync") == 0)
			*opt_mode = 2;
		else if (strcmp(argv[0], "powerdown") == 0)
			*opt_mode = 3;
		else if (strcmp(argv[0], "off") == 0)
			*opt_mode = 0;
		else
			*bad_arg = TRUE;
	} else {
		*opt_mode = 0;
	}
}

static void
parse_msglevel(int argc, char **argv, int *option, int *opt_all, int *bad_arg) {
	/* argc: Number of arguments for this option. */
	/* argv: Arguments for this option. */
	/* option: Clear flag to set. */
	/* opt_all: Clear all switch to set or reset. */
	/* bad_arg: Set to true if an error is detected. */

	if (argc > 1 || *option)
		*bad_arg = TRUE;
	*option = TRUE;
	if (argc == 1) {
		*opt_all = atoi(argv[0]);
		if (*opt_all < 0 || *opt_all > 8)
			*bad_arg = TRUE;
	} else {
		*opt_all = -1;
	}
}

static void
parse_snap(int argc, char **argv, int *option, int *opt_all, int *bad_arg) {
	/* argc: Number of arguments for this option. */
	/* argv: Arguments for this option. */
	/* option: Clear flag to set. */
	/* opt_all: Clear all switch to set or reset. */
	/* bad_arg: Set to true if an error is detected. */

/* Parse a -dump or -append specification. */

	if (argc > 1 || *option)
		*bad_arg = TRUE;
	*option = TRUE;
	if (argc == 1) {
		*opt_all = atoi(argv[0]);
		if ((*opt_all <= 0))
			*bad_arg = TRUE;
	} else {
		*opt_all = 0;
	}
}

static void
parse_snapfile(int argc, char **argv, int *option, int *opt_all, int *bad_arg) {
	/* argc: Number of arguments for this option. */
	/* argv: Arguments for this option. */
	/* option: Clear flag to set. */
	/* opt_all: Clear all switch to set or reset. */
	/* bad_arg: Set to true if an error is detected. */

/* Parse a -file specification. */

	if (argc != 1 || *option)
		*bad_arg = TRUE;
	*option = TRUE;
	memset(opt_all, 0, PATH_MAX + 1);
	if (argc == 1)
		strncpy((char *)opt_all, argv[0], PATH_MAX);
}

static void
parse_tabs(int argc, char **argv, int *option, int *tab_array, int *bad_arg) {
	/* argc: Number of arguments for this option. */
	/* argv: Arguments for this option. */
	/* option: Clear flag to set. */
	/* tab_array: Array of tabs */
	/* bad_arg: Set to true if an error is detected. */

	if (*option || argc > 160)
		*bad_arg = TRUE;
	*option = TRUE;
	tab_array[argc] = -1;
	while(argc--) {
		tab_array[argc] = atoi(argv[argc]);
		if(tab_array[argc] < 1 || tab_array[argc] > 160) {
			*bad_arg = TRUE;
			return;
		}
	}
}

static void
parse_clrtabs(int argc, char **argv, int *option, int *tab_array, int *bad_arg) {
	/* argc: Number of arguments for this option. */
	/* argv: Arguments for this option. */
	/* option: Clear flag to set. */
	/* tab_array: Array of tabs */
	/* bad_arg: Set to true if an error is detected. */

	if (*option || argc > 160)
		*bad_arg = TRUE;
	*option = TRUE;
	if(argc == 0) {
		tab_array[0] = -1;
		return;
	}
	tab_array[argc] = -1;
	while(argc--) {
		tab_array[argc] = atoi(argv[argc]);
		if(tab_array[argc] < 1 || tab_array[argc] > 160) {
			*bad_arg = TRUE;
			return;
		}
	}
}

static void
parse_regtabs(int argc, char **argv, int *option, int *opt_len, int *bad_arg) {
	/* argc: Number of arguments for this option. */
	/* argv: Arguments for this option. */
	/* option: Clear flag to set. */
	/* opt_len: Regular tab length. */
	/* bad_arg: Set to true if an error is detected. */

	if (*option || argc > 1)
		*bad_arg = TRUE;
	*option = TRUE;
	if(argc == 0) {
		*opt_len = 8;
		return;
	}
	*opt_len = atoi(argv[0]);
	if(*opt_len < 1 || *opt_len > 160) {
		*bad_arg = TRUE;
		return;
	}
}


static void
parse_blength(int argc, char **argv, int *option, int *opt_all, int *bad_arg) {
	/* argc: Number of arguments for this option. */
	/* argv: Arguments for this option. */
	/* option: Clear flag to set. */
	/* opt_all */
	/* bad_arg: Set to true if an error is detected. */

/* Parse  -blength specification. */

	if (argc > 1 || *option)
		*bad_arg = TRUE;
	*option = TRUE;
	if (argc == 1) {
		*opt_all = atoi(argv[0]);
		if (*opt_all > 2000)
			*bad_arg = TRUE;
	} else {
		*opt_all = 0;
	}
}

static void
parse_bfreq(int argc, char **argv, int *option, int *opt_all, int *bad_arg) {
	/* argc: Number of arguments for this option. */
	/* argv: Arguments for this option. */
	/* option: Clear flag to set. */
	/* opt_all */
	/* bad_arg: Set to true if an error is detected. */

/* Parse  -bfreq specification. */

	if (argc > 1 || *option)
		*bad_arg = TRUE;
	*option = TRUE;
	if (argc == 1) {
		*opt_all = atoi(argv[0]);
	} else {
		*opt_all = 0;
	}
}


static void
show_tabs(void) {
	int i, co = tigetnum("cols");

	if(co > 0) {
		printf("\r         ");
		for(i = 10; i < co-2; i+=10)
			printf("%-10d", i);
		putchar('\n');
		for(i = 1; i <= co; i++)
			putchar(i%10+'0');
		putchar('\n');
		for(i = 1; i < co; i++)
			printf("\tT\b");
		putchar('\n');
	}
}

static void __attribute__ ((__noreturn__))
usage(FILE *out) {
/* Print error message about arguments, and the command's syntax. */

	if (out == stderr)
		warnx(_("Argument error."));

	fputs(_("\nUsage:\n"), out);
	fprintf(out,
	      _(" %s [options]\n"), program_invocation_short_name);

	fputs(_("\nOptions:\n"), out);
	fputs(_(" -term <terminal_name>\n"), out);
	fputs(_(" -reset\n"), out);
	fputs(_(" -initialize\n"), out);
	fputs(_(" -cursor <on|off>\n"), out);
	fputs(_(" -repeat <on|off>\n"), out);
	fputs(_(" -appcursorkeys <on|off>\n"), out);
	fputs(_(" -linewrap <on|off>\n"), out);
	fputs(_(" -default\n"), out);
	fputs(_(" -foreground <default|black|blue|cyan|green|magenta|red|white|yellow>\n"), out);
	fputs(_(" -background <default|black|blue|cyan|green|magenta|red|white|yellow>\n"), out);
	fputs(_(" -ulcolor <black|blue|bright|cyan|green|grey|magenta|red|white|yellow>\n"), out);
	fputs(_(" -ulcolor <black|blue|bright|cyan|green|grey|magenta|red|white|yellow>\n"), out);
	fputs(_(" -hbcolor <black|blue|bright|cyan|green|grey|magenta|red|white|yellow>\n"), out);
	fputs(_(" -hbcolor <black|blue|bright|cyan|green|grey|magenta|red|white|yellow>\n"), out);
	fputs(_(" -inversescreen <on|off>\n"), out);
	fputs(_(" -bold <on|off>\n"), out);
	fputs(_(" -half-bright <on|off>\n"), out);
	fputs(_(" -blink <on|off>\n"), out);
	fputs(_(" -reverse <on|off>\n"), out);
	fputs(_(" -underline <on|off>\n"), out);
	fputs(_(" -store\n"), out);
	fputs(_(" -clear <all|rest>\n"), out);
	fputs(_(" -tabs <tab1 tab2 tab3 ...>      (tabn = 1-160)\n"), out);
	fputs(_(" -clrtabs <tab1 tab2 tab3 ...>   (tabn = 1-160)\n"), out);
	fputs(_(" -regtabs <1-160>\n"), out);
	fputs(_(" -blank <0-60|force|poke>\n"), out);
	fputs(_(" -dump   <1-NR_CONSOLES>\n"), out);
	fputs(_(" -append <1-NR_CONSOLES>\n"), out);
	fputs(_(" -file dumpfilename\n"), out);
	fputs(_(" -msg <on|off>\n"), out);
	fputs(_(" -msglevel <0-8>\n"), out);
	fputs(_(" -powersave <on|vsync|hsync|powerdown|off>\n"), out);
	fputs(_(" -powerdown <0-60>\n"), out);
	fputs(_(" -blength <0-2000>\n"), out);
	fputs(_(" -bfreq freqnumber\n"), out);
	fputs(_(" -version\n"), out);
	fputs(_(" -help\n"), out);

	fprintf(out, USAGE_MAN_TAIL("setterm(1)"));

	exit(out == stderr ? EXIT_FAILURE : EXIT_SUCCESS);
}

#define STRCMP(str1,str2) strncmp(str1,str2,strlen(str1))

static void
parse_option(char *option, int argc, char **argv, int *bad_arg) {
	/* option: Option with leading '-' removed. */
	/* argc: Number of arguments for this option. */
	/* argv: Arguments for this option. */
	/* bad_arg: Set to true if an error is detected. */

/* Parse a single specification. */

	if (STRCMP(option, "term") == 0)
		parse_term(argc, argv, &opt_term, &opt_te_terminal_name, bad_arg);
	else if (STRCMP(option, "reset") == 0)
		parse_none(argc, argv, &opt_reset, bad_arg);
	else if (STRCMP(option, "initialize") == 0)
		parse_none(argc, argv, &opt_initialize, bad_arg);
	else if (STRCMP(option, "cursor") == 0)
		parse_switch(argc, argv, &opt_cursor, &opt_cu_on, bad_arg);
	else if (STRCMP(option, "repeat") == 0)
		parse_switch(argc, argv, &opt_repeat, &opt_rep_on, bad_arg);
	else if (STRCMP(option, "appcursorkeys") == 0)
		parse_switch(argc, argv, &opt_appcursorkeys, &opt_appck_on, bad_arg);
	else if (STRCMP(option, "linewrap") == 0)
		parse_switch(argc, argv, &opt_linewrap, &opt_li_on, bad_arg);
	else if (STRCMP(option, "default") == 0)
		parse_none(argc, argv, &opt_default, bad_arg);
	else if (STRCMP(option, "foreground") == 0)
		par_color(argc, argv, &opt_foreground, &opt_fo_color, bad_arg);
	else if (STRCMP(option, "background") == 0)
		par_color(argc, argv, &opt_background, &opt_ba_color, bad_arg);
	else if (STRCMP(option, "ulcolor") == 0)
		par_color2(argc, argv, &opt_ulcolor, &opt_ul_color, bad_arg);
	else if (STRCMP(option, "hbcolor") == 0)
		par_color2(argc, argv, &opt_hbcolor, &opt_hb_color, bad_arg);
	else if (STRCMP(option, "inversescreen") == 0)
		parse_switch(argc, argv, &opt_inversescreen, &opt_invsc_on, bad_arg);
	else if (STRCMP(option, "bold") == 0)
		parse_switch(argc, argv, &opt_bold, &opt_bo_on, bad_arg);
	else if (STRCMP(option, "half-bright") == 0)
		parse_switch(argc, argv, &opt_halfbright, &opt_hb_on, bad_arg);
	else if (STRCMP(option, "blink") == 0)
		parse_switch(argc, argv, &opt_blink, &opt_bl_on, bad_arg);
	else if (STRCMP(option, "reverse") == 0)
		parse_switch(argc, argv, &opt_reverse, &opt_re_on, bad_arg);
	else if (STRCMP(option, "underline") == 0)
		parse_switch(argc, argv, &opt_underline, &opt_un_on, bad_arg);
	else if (STRCMP(option, "store") == 0)
		parse_none(argc, argv, &opt_store, bad_arg);
	else if (STRCMP(option, "clear") == 0)
		parse_clear(argc, argv, &opt_clear, &opt_cl_all, bad_arg);
	else if (STRCMP(option, "tabs") == 0)
		parse_tabs(argc, argv, &opt_tabs, opt_tb_array, bad_arg);
	else if (STRCMP(option, "clrtabs") == 0)
		parse_clrtabs(argc, argv, &opt_clrtabs, opt_tb_array, bad_arg);
	else if (STRCMP(option, "regtabs") == 0)
		parse_regtabs(argc, argv, &opt_regtabs, &opt_rt_len, bad_arg);
	else if (STRCMP(option, "blank") == 0)
		parse_blank(argc, argv, &opt_blank, &opt_bl_min, bad_arg);
	else if (STRCMP(option, "dump") == 0)
		parse_snap(argc, argv, &opt_snap, &opt_sn_num, bad_arg);
	else if (STRCMP(option, "append") == 0)
		parse_snap(argc, argv, &opt_append, &opt_sn_num, bad_arg);
	else if (STRCMP(option, "file") == 0)
		parse_snapfile(argc, argv, &opt_snapfile, (int *)opt_sn_name, bad_arg);
	else if (STRCMP(option, "msg") == 0)
		parse_switch(argc, argv, &opt_msg, &opt_msg_on, bad_arg);
	else if (STRCMP(option, "msglevel") == 0)
		parse_msglevel(argc, argv, &opt_msglevel, &opt_msglevel_num, bad_arg);
	else if (STRCMP(option, "powersave") == 0)
		parse_powersave(argc, argv, &opt_powersave, &opt_ps_mode, bad_arg);
	else if (STRCMP(option, "powerdown") == 0)
		parse_blank(argc, argv, &opt_powerdown, &opt_pd_min, bad_arg);
	else if (STRCMP(option, "blength") == 0)
		parse_blength(argc, argv, &opt_blength, &opt_blength_l, bad_arg);
	else if (STRCMP(option, "bfreq") == 0)
		parse_bfreq(argc, argv, &opt_bfreq, &opt_bfreq_f, bad_arg);
	else if (STRCMP(option, "version") == 0) {
		printf(_("%s from %s\n"), program_invocation_short_name,
					  PACKAGE_STRING);
		exit(EXIT_SUCCESS);
	} else if (STRCMP(option, "help") == 0)
		usage(stdout);
	else
		*bad_arg = TRUE;
}

/* End of command line parsing routines. */

static char *ti_entry(const char *name) {
	/* name: Terminfo capability string to lookup. */

/* Return the specified terminfo string, or an empty string if no such terminfo
 * capability exists.
 */

	char *buf_ptr;

	if ((buf_ptr = tigetstr((char *)name)) == (char *)-1)
		buf_ptr = NULL;
	return buf_ptr;
}

static void
perform_sequence(int vcterm) {
	/* vcterm: Set if terminal is a virtual console. */

	int result;
/* Perform the selected options. */

	/* -reset. */
	if (opt_reset) {
		putp(ti_entry("rs1"));
	}

	/* -initialize. */
	if (opt_initialize) {
		putp(ti_entry("is2"));
	}

	/* -cursor [on|off]. */
	if (opt_cursor) {
		if (opt_cu_on)
			putp(ti_entry("cnorm"));
		else
			putp(ti_entry("civis"));
	}

	/* -linewrap [on|off]. Vc only (vt102) */
	if (opt_linewrap && vcterm)
		fputs(opt_li_on ? "\033[?7h" : "\033[?7l", stdout);

	/* -repeat [on|off]. Vc only (vt102) */
	if (opt_repeat && vcterm)
		fputs(opt_rep_on ? "\033[?8h" : "\033[?8l", stdout);

	/* -appcursorkeys [on|off]. Vc only (vt102) */
	if (opt_appcursorkeys && vcterm)
		fputs(opt_appck_on ? "\033[?1h" : "\033[?1l", stdout);

	/* -default.  Vc sets default rendition, otherwise clears all
	 * attributes.
	 */
	if (opt_default) {
		if (vcterm)
			printf("\033[0m");
		else
			putp(ti_entry("sgr0"));
	}

	/* -foreground black|red|green|yellow|blue|magenta|cyan|white|default.
	 * Vc only (ANSI).
	 */
	if (opt_foreground && vcterm)
		printf("\033[3%c%s", '0' + opt_fo_color, "m");

	/* -background black|red|green|yellow|blue|magenta|cyan|white|default.
	 * Vc only (ANSI).
	 */
	if (opt_background && vcterm)
		printf("\033[4%c%s", '0' + opt_ba_color, "m");

	/* -ulcolor black|red|green|yellow|blue|magenta|cyan|white|default.
	 * Vc only.
	 */
	if (opt_ulcolor && vcterm) {
		printf("\033[1;%d]", opt_ul_color);
	}

	/* -hbcolor black|red|green|yellow|blue|magenta|cyan|white|default.
	 * Vc only.
	 */
	if (opt_hbcolor && vcterm) {
		printf("\033[2;%d]", opt_hb_color);
	}

	/* -inversescreen [on|off].  Vc only (vt102).
	 */
	if (opt_inversescreen && vcterm)
		fputs(opt_invsc_on ? "\033[?5h" : "\033[?5l", stdout);

	/* -bold [on|off].  Vc behaves as expected, otherwise off turns off
	 * all attributes.
	 */
	if (opt_bold) {
		if (opt_bo_on)
			putp(ti_entry("bold"));
		else {
			if (vcterm)
				fputs("\033[22m", stdout);
			else
				putp(ti_entry("sgr0"));
		}
	}

	/* -half-bright [on|off].  Vc behaves as expected, otherwise off turns off
	 * all attributes.
	 */
	if (opt_halfbright) {
		if (opt_hb_on)
			putp(ti_entry("dim"));
		else {
			if (vcterm)
				fputs("\033[22m", stdout);
			else
				putp(ti_entry("sgr0"));
		}
	}

	/* -blink [on|off].  Vc behaves as expected, otherwise off turns off
	 * all attributes.
	 */
	if (opt_blink) {
		if (opt_bl_on)
			putp(ti_entry("blink"));
		else {
			if (vcterm)
				fputs("\033[25m", stdout);
			else
				putp(ti_entry("sgr0"));
		}
	}

	/* -reverse [on|off].  Vc behaves as expected, otherwise off turns
	 * off all attributes.
	 */
	if (opt_reverse) {
		if (opt_re_on)
			putp(ti_entry("rev"));
		else {
			if (vcterm)
				fputs("\033[27m", stdout);
			else
				putp(ti_entry("sgr0"));
		}
	}

	/* -underline [on|off]. */
	if (opt_underline)
		putp(ti_entry(opt_un_on ? "smul" : "rmul"));

	/* -store.  Vc only. */
	if (opt_store && vcterm)
		fputs("\033[8]", stdout);

	/* -clear [all|rest]. */
	if (opt_clear)
		putp(ti_entry(opt_cl_all ? "clear" : "ed"));

	/* -tabs Vc only. */
	if (opt_tabs && vcterm) {
		int i;

		if (opt_tb_array[0] == -1)
			show_tabs();
		else {
			for(i=0; opt_tb_array[i] > 0; i++)
				printf("\033[%dG\033H", opt_tb_array[i]);
			putchar('\r');
		}
	}

	/* -clrtabs Vc only. */
	if (opt_clrtabs && vcterm) {
		int i;

		if (opt_tb_array[0] == -1)
			fputs("\033[3g", stdout);
		else
			for(i=0; opt_tb_array[i] > 0; i++)
				printf("\033[%dG\033[g", opt_tb_array[i]);
		putchar('\r');
	}

	/* -regtabs Vc only. */
	if (opt_regtabs && vcterm) {
		int i;

		fputs("\033[3g\r", stdout);
		for(i=opt_rt_len+1; i<=160; i+=opt_rt_len)
			printf("\033[%dC\033H",opt_rt_len);
		putchar('\r');
	}

	/* -blank [0-60]. */
	if (opt_blank && vcterm) {
		if (opt_bl_min >= 0)
			printf("\033[9;%d]", opt_bl_min);
		else if (opt_bl_min == BLANKSCREEN) {
			char ioctlarg = TIOCL_BLANKSCREEN;
			if (ioctl(0,TIOCLINUX,&ioctlarg))
				warn(_("cannot force blank"));
		} else if (opt_bl_min == UNBLANKSCREEN) {
			char ioctlarg = TIOCL_UNBLANKSCREEN;
			if (ioctl(0,TIOCLINUX,&ioctlarg))
				warn(_("cannot force unblank"));
		} else if (opt_bl_min == BLANKEDSCREEN) {
			char ioctlarg = TIOCL_BLANKEDSCREEN;
			int ret;
			ret = ioctl(0,TIOCLINUX,&ioctlarg);
			if (ret < 0)
				warn(_("cannot get blank status"));
			else
				printf("%d\n",ret);
		}
	}

	/* -powersave [on|vsync|hsync|powerdown|off] (console) */
	if (opt_powersave) {
		char ioctlarg[2];
		ioctlarg[0] = TIOCL_SETVESABLANK;
		ioctlarg[1] = opt_ps_mode;
		if (ioctl(0,TIOCLINUX,ioctlarg))
			warn(_("cannot (un)set powersave mode"));
	}

	/* -powerdown [0-60]. */
	if (opt_powerdown) {
		printf("\033[14;%d]", opt_pd_min);
	}

	/* -snap [1-NR_CONS]. */
	if (opt_snap || opt_append) {
		FILE *F;

		F = fopen(opt_sn_name, opt_snap ? "w" : "a");
		if (!F)
			err(EXIT_DUMPFILE, _("can not open dump file %s for output"),
				opt_sn_name); 
		screendump(opt_sn_num, F);
		if (close_stream(F) != 0)
			errx(EXIT_FAILURE, _("write error"));
	}

	/* -msg [on|off]. */
	if (opt_msg && vcterm) {
		if (opt_msg_on)
			/* 7 -- Enable printk's to console */
			result = klogctl(7, NULL, 0);
		else
			/*  6 -- Disable printk's to console */
			result = klogctl(6, NULL, 0);

		if (result != 0)
			warn(_("klogctl error"));
	}

	/* -msglevel [0-8] */
	if (opt_msglevel && vcterm) {
		/* 8 -- Set level of messages printed to console */
		result = klogctl(8, NULL, opt_msglevel_num);
		if (result != 0)
			warn(_("klogctl error"));
	}

	/* -blength [0-2000] */
	if (opt_blength && vcterm) {
		printf("\033[11;%d]", opt_blength_l);
	}

	/* -bfreq freqnumber */
	if (opt_bfreq && vcterm) {
		printf("\033[10;%d]", opt_bfreq_f);
	}

}

static void
screendump(int vcnum, FILE * F)
{
	char infile[MAXPATHLEN];
	unsigned char header[4];
	unsigned int rows, cols;
	int fd;
	size_t i, j;
	ssize_t rc;
	char *inbuf = NULL, *outbuf = NULL, *p, *q;

	sprintf(infile, "/dev/vcsa%d", vcnum);
	fd = open(infile, O_RDONLY);
	if (fd < 0 && vcnum == 0) {
		/* vcsa0 is often called vcsa */
		sprintf(infile, "/dev/vcsa");
		fd = open(infile, O_RDONLY);
	}
	if (fd < 0) {
		/* try devfs name - for zero vcnum just /dev/vcc/a */
		/* some gcc's warn for %.u - add 0 */
		sprintf(infile, "/dev/vcc/a%.0u", vcnum);
		fd = open(infile, O_RDONLY);
	}
	if (fd < 0) {
		sprintf(infile, "/dev/vcsa%d", vcnum);
		goto read_error;
	}
	if (read(fd, header, 4) != 4)
		goto read_error;
	rows = header[0];
	cols = header[1];
	if (rows * cols == 0)
		goto read_error;

	inbuf = xmalloc(rows * cols * 2);
	outbuf = xmalloc(rows * (cols + 1));

	rc = read(fd, inbuf, rows * cols * 2);
	if (rc < 0 || (size_t) rc != rows * cols * 2)
		goto read_error;
	p = inbuf;
	q = outbuf;
	for (i = 0; i < rows; i++) {
		for (j = 0; j < cols; j++) {
			*q++ = *p;
			p += 2;
		}
		while (j-- > 0 && q[-1] == ' ')
			q--;
		*q++ = '\n';
	}
	if (fwrite(outbuf, 1, q - outbuf, F) != (size_t) (q - outbuf)) {
		warnx(_("Error writing screendump"));
		goto error;
	}
	close(fd);
	free(inbuf);
	free(outbuf);
	return;

read_error:
	if (vcnum != 0)
		warnx(_("Couldn't read %s"), infile);
	else
		warnx(_("Couldn't read neither /dev/vcsa0 nor /dev/vcsa"));

error:
	if (fd >= 0)
		close(fd);
	free(inbuf);
	free(outbuf);
	exit(EXIT_FAILURE);
}

int
main(int argc, char **argv) {
	int bad_arg = FALSE;		/* Set if error in arguments. */
	int arg, modifier;
	char *term;			/* Terminal type. */
	int vcterm;			/* Set if terminal is a virtual console. */
	int errret;

	setlocale(LC_ALL, "");
	bindtextdomain(PACKAGE, LOCALEDIR);
	textdomain(PACKAGE);
	atexit(close_stdout);

	if (argc < 2)
		bad_arg = TRUE;

	/* Parse arguments. */

	for (arg = 1; arg < argc;) {
		if (*argv[arg] == '-') {

			/* Parse a single option. */

			for (modifier = arg + 1; modifier < argc; modifier++) {
				if (*argv[modifier] == '-') break;
			}
			parse_option(argv[arg] + 1, modifier - arg - 1,
				     &argv[arg + 1], &bad_arg);
			arg = modifier;
		} else {
			bad_arg = TRUE;
			arg++;
		}
	}

	/* Display syntax message if error in arguments. */

	if (bad_arg)
		usage(stderr);

	/* Find out terminal name. */

	if (opt_term) {
		term = opt_te_terminal_name;
	} else {
		term = getenv("TERM");
		if (term == NULL)
			errx(EXIT_FAILURE, _("$TERM is not defined."));
	}

	/* Find terminfo entry. */

	if (setupterm(term, 1, &errret))
		switch(errret) {
		case -1:
			errx(EXIT_FAILURE, _("terminfo database cannot be found"));
		case 0:
			errx(EXIT_FAILURE, _("%s: unknown terminal type"), term);
		case 1:
			errx(EXIT_FAILURE, _("terminal is hardcopy"));
		}

	/* See if the terminal is a virtual console terminal. */

	vcterm = (!strncmp(term, "con", 3) || !strncmp(term, "linux", 5));

	/* Perform the selected options. */

	perform_sequence(vcterm);

	return EXIT_SUCCESS;
}