setterm.c

Util-linux 软件包包含许多工具。其中比较重要的是加载、卸载、格式化、分区和管理硬盘驱动器

/* setterm.c, set terminal attributes.
 *
 * Copyright (C) 1990 Gordon Irlam ([e-mail]).  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 ([e-mail])
 *
 * Beep modifications by Christophe Jolif ([e-mail])
 *
 * Sanity increases by Cafeine Addict [sic].
 *
 * Powersave features by todd j. derr <[e-mail]>
 *
 * Converted to terminfo by Kars de Jong ([e-mail])
 *
 * 1999-02-22 Arkadiusz Mi秌iewicz <[e-mail]>
 * - 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] ]
 *   [ -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 ]
 *
 *
 * Semantics:
 *
 * Setterm writes to standard output a character string that will
 * invoke the specified terminal capabilities.  Where possibile
 * 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
#include <term.h>
#if NCH
#include <ncurses.h>
#else
#include <curses.h>
#endif
#include <sys/param.h>		/* for MAXPATHLEN */
#include <sys/ioctl.h>
#include <sys/time.h>
#include "nls.h"

#ifndef TCGETS
/* TCGETS is either defined in termios.h, or here: */
#include <asm/ioctls.h>
#endif

#if __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. */

/* General constants. */
#ifndef TRUE
#define TRUE  1
#define FALSE 0
#endif

/* Keyboard types. */
#define PC	 0
#define OLIVETTI 1
#define DUTCH    2
#define EXTENDED 3

/* Colors. */
#define BLACK   0
#define RED     1
#define GREEN   2
#define YELLOW  3
#define BLUE    4
#define MAGENTA 5
#define CYAN    6
#define WHITE   7
#define GREY	8
#define DEFAULT 9

/* Control sequences. */
#define ESC "\033"
#define DCS "\033P"
#define ST  "\033\\"

/* Static variables. */

/* Option flags.  Set if the option is to be invoked. */
int opt_term, opt_reset, opt_initialize, opt_cursor;
int opt_linewrap, opt_snow, opt_softscroll, 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, opt_standout;
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_sn_on, opt_so_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_ke_type;		/* Keyboard type. */
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_st_attr;
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[200] = "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 **opt_term, int *bad_arg) {
	/* argc: Number of arguments for this option. */
	/* argv: Arguments for this option. */
	/* option: Term flag to set. */
	/* opt_term: 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)
		*opt_term = argv[0];
}

static void
parse_none(int argc, char **argv, 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 < 0 || *opt_color > 9 || *opt_color == 8)
			*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 = 8;
		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 < 0 || *opt_color > 15)
			*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) {
		*opt_all = atoi(argv[0]);
		if ((*opt_all > 60) || (*opt_all < 0))
			*bad_arg = TRUE;
	} else {
		*opt_all = 0;
	}
}

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;