console-tools/loadfont.c - busybox - Git at Google

 /* vi: set sw=4 ts=4: */
 /*
  * loadfont.c - Eugene Crosser & Andries Brouwer
  *
  * Version 0.96bb
  *
  * Loads the console font, and possibly the corresponding screen map(s).
  * (Adapted for busybox by Matej Vela.)
  *
  * Licensed under GPLv2, see file LICENSE in this source tree.
  */
 //config:config LOADFONT
 //config:	bool "loadfont (5.2 kb)"
 //config:	default y
 //config:	select PLATFORM_LINUX
 //config:	help
 //config:	This program loads a console font from standard input.
 //config:
 //config:config SETFONT
 //config:	bool "setfont (24 kb)"
 //config:	default y
 //config:	select PLATFORM_LINUX
 //config:	help
 //config:	Allows to load console screen map. Useful for i18n.
 //config:
 //config:config FEATURE_SETFONT_TEXTUAL_MAP
 //config:	bool "Support reading textual screen maps"
 //config:	default y
 //config:	depends on SETFONT
 //config:	help
 //config:	Support reading textual screen maps.
 //config:
 //config:config DEFAULT_SETFONT_DIR
 //config:	string "Default directory for console-tools files"
 //config:	default ""
 //config:	depends on SETFONT
 //config:	help
 //config:	Directory to use if setfont's params are simple filenames
 //config:	(not /path/to/file or ./file). Default is "" (no default directory).
 //config:
 //config:comment "Common options for loadfont and setfont"
 //config:	depends on LOADFONT || SETFONT
 //config:
 //config:config FEATURE_LOADFONT_PSF2
 //config:	bool "Support PSF2 console fonts"
 //config:	default y
 //config:	depends on LOADFONT || SETFONT
 //config:
 //config:config FEATURE_LOADFONT_RAW
 //config:	bool "Support old (raw) console fonts"
 //config:	default y
 //config:	depends on LOADFONT || SETFONT

 //applet:IF_LOADFONT(APPLET_NOEXEC(loadfont, loadfont, BB_DIR_USR_SBIN, BB_SUID_DROP, loadfont))
 //applet:IF_SETFONT(APPLET_NOEXEC(setfont, setfont, BB_DIR_USR_SBIN, BB_SUID_DROP, setfont))

 //kbuild:lib-$(CONFIG_LOADFONT) += loadfont.o
 //kbuild:lib-$(CONFIG_SETFONT) += loadfont.o

 #include "libbb.h"
 #include <sys/kd.h>

 #ifndef KDFONTOP
 # define KDFONTOP 0x4B72
 struct console_font_op {
 	unsigned op;            /* KD_FONT_OP_* */
 	unsigned flags;         /* KD_FONT_FLAG_* */
 	unsigned width, height;
 	unsigned charcount;
 	unsigned char *data;    /* font data with height fixed to 32 */
 };
 # define KD_FONT_OP_SET          0  /* Set font */
 # define KD_FONT_OP_GET          1  /* Get font */
 # define KD_FONT_OP_SET_DEFAULT  2  /* Set font to default, data points to name / NULL */
 # define KD_FONT_OP_COPY         3  /* Copy from another console */
 # define KD_FONT_FLAG_OLD        0x80000000 /* Invoked via old interface */
 # define KD_FONT_FLAG_DONT_RECALC 1 /* Don't call adjust_height() */
                                    /* (Used internally for PIO_FONT support) */
 #endif /* KDFONTOP */


 enum {
 	PSF1_MAGIC0 = 0x36,
 	PSF1_MAGIC1 = 0x04,
 	PSF1_MODE512 = 0x01,
 	PSF1_MODEHASTAB = 0x02,
 	PSF1_MODEHASSEQ = 0x04,
 	PSF1_MAXMODE = 0x05,
 	PSF1_STARTSEQ = 0xfffe,
 	PSF1_SEPARATOR = 0xffff,
 };

 struct psf1_header {
 	unsigned char magic[2];         /* Magic number */
 	unsigned char mode;             /* PSF font mode */
 	unsigned char charsize;         /* Character size */
 };

 #define psf1h(x) ((struct psf1_header*)(x))

 #define PSF1_MAGIC_OK(x) ( \
      (x)->magic[0] == PSF1_MAGIC0 \
   && (x)->magic[1] == PSF1_MAGIC1 \
 )

 #if ENABLE_FEATURE_LOADFONT_PSF2
 enum {
 	PSF2_MAGIC0 = 0x72,
 	PSF2_MAGIC1 = 0xb5,
 	PSF2_MAGIC2 = 0x4a,
 	PSF2_MAGIC3 = 0x86,
 	PSF2_HAS_UNICODE_TABLE = 0x01,
 	PSF2_MAXVERSION = 0,
 	PSF2_STARTSEQ = 0xfe,
 	PSF2_SEPARATOR = 0xff
 };

 struct psf2_header {
 	unsigned char magic[4];
 	unsigned int version;
 	unsigned int headersize;    /* offset of bitmaps in file */
 	unsigned int flags;
 	unsigned int length;        /* number of glyphs */
 	unsigned int charsize;      /* number of bytes for each character */
 	unsigned int height;        /* max dimensions of glyphs */
 	unsigned int width;         /* charsize = height * ((width + 7) / 8) */
 };

 #define psf2h(x) ((struct psf2_header*)(x))

 #define PSF2_MAGIC_OK(x) ( \
      (x)->magic[0] == PSF2_MAGIC0 \
   && (x)->magic[1] == PSF2_MAGIC1 \
   && (x)->magic[2] == PSF2_MAGIC2 \
   && (x)->magic[3] == PSF2_MAGIC3 \
 )
 #endif /* ENABLE_FEATURE_LOADFONT_PSF2 */


 static void do_loadfont(int fd, unsigned char *inbuf, int height, int width, int charsize, int fontsize)
 {
 	unsigned char *buf;
 	int charwidth = 32 * ((width+7)/8);
 	int i;

 	if (height < 1 || height > 32 || width < 1 || width > 32)
 		bb_error_msg_and_die("bad character size %dx%d", height, width);

 	buf = xzalloc(charwidth * ((fontsize < 128) ? 128 : fontsize));
 	for (i = 0; i < fontsize; i++)
 		memcpy(buf + (i*charwidth), inbuf + (i*charsize), charsize);

 	{ /* KDFONTOP */
 		struct console_font_op cfo;
 		cfo.op = KD_FONT_OP_SET;
 		cfo.flags = 0;
 		cfo.width = width;
 		cfo.height = height;
 		cfo.charcount = fontsize;
 		cfo.data = buf;
 		xioctl(fd, KDFONTOP, &cfo);
 	}

 	free(buf);
 }

 /*
  * Format of the Unicode information:
  *
  * For each font position <uc>*<seq>*<term>
  * where <uc> is a 2-byte little endian Unicode value (PSF1)
  * or an UTF-8 coded value (PSF2),
  * <seq> = <ss><uc><uc>*, <ss> = psf1 ? 0xFFFE : 0xFE,
  * <term> = psf1 ? 0xFFFF : 0xFF.
  * and * denotes zero or more occurrences of the preceding item.
  *
  * Semantics:
  * The leading <uc>* part gives Unicode symbols that are all
  * represented by this font position. The following sequences
  * are sequences of Unicode symbols - probably a symbol
  * together with combining accents - also represented by
  * this font position.
  *
  * Example:
  * At the font position for a capital A-ring glyph, we
  * may have:
  *   00C5,212B,FFFE,0041,030A,FFFF
  * Some font positions may be described by sequences only,
  * namely when there is no precomposed Unicode value for the glyph.
  */
 #if !ENABLE_FEATURE_LOADFONT_PSF2
 #define do_loadtable(fd, inbuf, tailsz, fontsize, psf2) \
 	do_loadtable(fd, inbuf, tailsz, fontsize)
 #endif
 static void do_loadtable(int fd, unsigned char *inbuf, int tailsz, int fontsize, int psf2)
 {
 #if !ENABLE_FEATURE_LOADFONT_PSF2
 /* gcc 4.3.1 code size: */
 # define psf2 0 /* +0 bytes */
 //	const int psf2 = 0; /* +8 bytes */
 //	enum { psf2 = 0 }; /* +13 bytes */
 #endif
 	struct unimapinit advice;
 	struct unimapdesc ud;
 	struct unipair *up;
 	int ct = 0, maxct;
 	int glyph;
 	uint16_t unicode;

 	maxct = tailsz; /* more than enough */
 	up = xmalloc(maxct * sizeof(*up));

 	for (glyph = 0; glyph < fontsize; glyph++) {
 		while (tailsz > 0) {
 			if (!psf2) { /* PSF1 */
 				unicode = (((uint16_t) inbuf[1]) << 8) + inbuf[0];
 				tailsz -= 2;
 				inbuf += 2;
 				if (unicode == PSF1_SEPARATOR)
 					break;
 			} else { /* PSF2 */
 #if ENABLE_FEATURE_LOADFONT_PSF2
 				--tailsz;
 				unicode = *inbuf++;
 				if (unicode == PSF2_SEPARATOR) {
 					break;
 				} else if (unicode == PSF2_STARTSEQ) {
 					bb_simple_error_msg_and_die("unicode sequences not implemented");
 				} else if (unicode >= 0xC0) {
 					if (unicode >= 0xFC)
 						unicode &= 0x01, maxct = 5;
 					else if (unicode >= 0xF8)
 						unicode &= 0x03, maxct = 4;
 					else if (unicode >= 0xF0)
 						unicode &= 0x07, maxct = 3;
 					else if (unicode >= 0xE0)
 						unicode &= 0x0F, maxct = 2;
 					else
 						unicode &= 0x1F, maxct = 1;
 					do {
 						if (tailsz <= 0 || *inbuf < 0x80 || *inbuf > 0xBF)
 							bb_simple_error_msg_and_die("illegal UTF-8 character");
 						--tailsz;
 						unicode = (unicode << 6) + (*inbuf++ & 0x3F);
 					} while (--maxct > 0);
 				} else if (unicode >= 0x80) {
 					bb_simple_error_msg_and_die("illegal UTF-8 character");
 				}
 #else
 				return;
 #endif
 			}
 			up[ct].unicode = unicode;
 			up[ct].fontpos = glyph;
 			ct++;
 		}
 	}

 	/* Note: after PIO_UNIMAPCLR and before PIO_UNIMAP
 	 * this printf did not work on many kernels */

 	advice.advised_hashsize = 0;
 	advice.advised_hashstep = 0;
 	advice.advised_hashlevel = 0;
 	xioctl(fd, PIO_UNIMAPCLR, &advice);
 	ud.entry_ct = ct;
 	ud.entries = up;
 	xioctl(fd, PIO_UNIMAP, &ud);
 #undef psf2
 }

 static void do_load(int fd, unsigned char *buffer, size_t len)
 {
 	int height;
 	int width = 8;
 	int charsize;
 	int fontsize = 256;
 	int has_table = 0;
 	unsigned char *font = buffer;
 	unsigned char *table;

 	if (len >= sizeof(struct psf1_header) && PSF1_MAGIC_OK(psf1h(buffer))) {
 		if (psf1h(buffer)->mode > PSF1_MAXMODE)
 			bb_simple_error_msg_and_die("unsupported psf file mode");
 		if (psf1h(buffer)->mode & PSF1_MODE512)
 			fontsize = 512;
 		if (psf1h(buffer)->mode & PSF1_MODEHASTAB)
 			has_table = 1;
 		height = charsize = psf1h(buffer)->charsize;
 		font += sizeof(struct psf1_header);
 	} else
 #if ENABLE_FEATURE_LOADFONT_PSF2
 	if (len >= sizeof(struct psf2_header) && PSF2_MAGIC_OK(psf2h(buffer))) {
 		if (psf2h(buffer)->version > PSF2_MAXVERSION)
 			bb_simple_error_msg_and_die("unsupported psf file version");
 		fontsize = psf2h(buffer)->length;
 		if (psf2h(buffer)->flags & PSF2_HAS_UNICODE_TABLE)
 			has_table = 2;
 		charsize = psf2h(buffer)->charsize;
 		height = psf2h(buffer)->height;
 		width = psf2h(buffer)->width;
 		font += psf2h(buffer)->headersize;
 	} else
 #endif
 #if ENABLE_FEATURE_LOADFONT_RAW
 	if (len == 9780) {  /* file with three code pages? */
 		charsize = height = 16;
 		font += 40;
 	} else if ((len & 0377) == 0) {  /* bare font */
 		charsize = height = len / 256;
 	} else
 #endif
 	{
 		bb_simple_error_msg_and_die("input file: bad length or unsupported font type");
 	}

 #if !defined(PIO_FONTX) || defined(__sparc__)
 	if (fontsize != 256)
 		bb_simple_error_msg_and_die("only fontsize 256 supported");
 #endif

 	table = font + fontsize * charsize;
 	buffer += len;

 	if (table > buffer || (!has_table && table != buffer))
 		bb_simple_error_msg_and_die("input file: bad length");

 	do_loadfont(fd, font, height, width, charsize, fontsize);

 	if (has_table)
 		do_loadtable(fd, table, buffer - table, fontsize, has_table - 1);
 }


 #if ENABLE_LOADFONT
 //usage:#define loadfont_trivial_usage
 //usage:       "< font"
 //usage:#define loadfont_full_usage "\n\n"
 //usage:       "Load a console font from stdin"
 /* //usage:     "\n	-C TTY	Affect TTY instead of /dev/tty" */
 //usage:
 //usage:#define loadfont_example_usage
 //usage:       "$ loadfont < /etc/i18n/fontname\n"
 int loadfont_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int loadfont_main(int argc UNUSED_PARAM, char **argv)
 {
 	size_t len;
 	unsigned char *buffer;

 	// no arguments allowed!
 	getopt32(argv, "^" "" "\0" "=0");

 	/*
 	 * We used to look at the length of the input file
 	 * with stat(); now that we accept compressed files,
 	 * just read the entire file.
 	 * Len was 32k, but latarcyrheb-sun32.psfu is 34377 bytes
 	 * (it has largish Unicode map).
 	 */
 	len = 128*1024;
 	buffer = xmalloc_read(STDIN_FILENO, &len);
 	// xmalloc_open_zipped_read_close(filename, &len);
 	if (!buffer)
 		bb_simple_perror_msg_and_die("error reading input font");
 	do_load(get_console_fd_or_die(), buffer, len);

 	return EXIT_SUCCESS;
 }
 #endif


 #if ENABLE_SETFONT
 /* kbd-1.12:
 setfont [-O font+umap.orig] [-o font.orig] [-om cmap.orig]
 [-ou umap.orig] [-N] [font.new ...] [-m cmap] [-u umap] [-C console]
 [-hNN] [-v] [-V]

 -h NN  Override font height
 -o file
        Save previous font in file
 -O file
        Save previous font and Unicode map in file
 -om file
        Store console map in file
 -ou file
        Save previous Unicode map in file
 -m file
        Load console map or Unicode console map from file
 -u file
        Load Unicode table describing the font from file
        Example:
        # cp866
        0x00-0x7f       idem
        #
        0x80    U+0410  # CYRILLIC CAPITAL LETTER A
        0x81    U+0411  # CYRILLIC CAPITAL LETTER BE
        0x82    U+0412  # CYRILLIC CAPITAL LETTER VE
 -C console
        Set the font for the indicated console
 -v     Verbose
 -V     Version
 */
 //usage:#define setfont_trivial_usage
 //usage:       "FONT [-m MAPFILE] [-C TTY]"
 //usage:#define setfont_full_usage "\n\n"
 //usage:       "Load a console font\n"
 //usage:     "\n	-m MAPFILE	Load console screen map"
 //usage:     "\n	-C TTY		Affect TTY instead of /dev/tty"
 //usage:
 //usage:#define setfont_example_usage
 //usage:       "$ setfont -m koi8-r /etc/i18n/fontname\n"

 # if ENABLE_FEATURE_SETFONT_TEXTUAL_MAP
 static int ctoi(char *s)
 {
 	if (s[0] == '\'' && s[1] != '\0' && s[2] == '\'' && s[3] == '\0')
 		return s[1];
 	// U+ means 0x
 	if (s[0] == 'U' && s[1] == '+') {
 		s[0] = '0';
 		s[1] = 'x';
 	}
 	if (!isdigit(s[0]))
 		return -1;
 	return xstrtoul(s, 0);
 }
 # endif

 int setfont_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int setfont_main(int argc UNUSED_PARAM, char **argv)
 {
 	size_t len;
 	unsigned opts;
 	int fd;
 	unsigned char *buffer;
 	char *mapfilename;
 	const char *tty_name = CURRENT_TTY;

 	opts = getopt32(argv, "^" "m:C:" "\0" "=1", &mapfilename, &tty_name);
 	argv += optind;

 	fd = xopen_nonblocking(tty_name);

 	if (sizeof(CONFIG_DEFAULT_SETFONT_DIR) > 1) { // if not ""
 		if (*argv[0] != '/') {
 			// goto default fonts location. don't die if doesn't exist
 			chdir(CONFIG_DEFAULT_SETFONT_DIR "/consolefonts");
 		}
 	}
 	// load font
 	len = 128*1024;
 	buffer = xmalloc_open_zipped_read_close(*argv, &len);
 	if (!buffer)
 		bb_simple_perror_msg_and_die(*argv);
 	do_load(fd, buffer, len);

 	// load the screen map, if any
 	if (opts & 1) { // -m
 		unsigned mode = PIO_SCRNMAP;
 		void *map;

 		if (sizeof(CONFIG_DEFAULT_SETFONT_DIR) > 1) { // if not ""
 			if (mapfilename[0] != '/') {
 				// goto default keymaps location
 				chdir(CONFIG_DEFAULT_SETFONT_DIR "/consoletrans");
 			}
 		}
 		// fetch keymap
 		map = xmalloc_open_zipped_read_close(mapfilename, &len);
 		if (!map)
 			bb_simple_perror_msg_and_die(mapfilename);
 		// file size is 256 or 512 bytes? -> assume binary map
 		if (len == E_TABSZ || len == 2*E_TABSZ) {
 			if (len == 2*E_TABSZ)
 				mode = PIO_UNISCRNMAP;
 		}
 # if ENABLE_FEATURE_SETFONT_TEXTUAL_MAP
 		// assume textual Unicode console maps:
 		// 0x00 U+0000  #  NULL (NUL)
 		// 0x01 U+0001  #  START OF HEADING (SOH)
 		// 0x02 U+0002  #  START OF TEXT (STX)
 		// 0x03 U+0003  #  END OF TEXT (ETX)
 		else {
 			int i;
 			char *token[2];
 			parser_t *parser;

 			if (ENABLE_FEATURE_CLEAN_UP)
 				free(map);
 			map = xmalloc(E_TABSZ * sizeof(unsigned short));

 #define unicodes ((unsigned short *)map)
 			// fill vanilla map
 			for (i = 0; i < E_TABSZ; i++)
 				unicodes[i] = 0xf000 + i;

 			parser = config_open(mapfilename);
 			while (config_read(parser, token, 2, 2, "# \t", PARSE_NORMAL | PARSE_MIN_DIE)) {
 				// parse code/value pair
 				int a = ctoi(token[0]);
 				int b = ctoi(token[1]);
 				if (a < 0 || a >= E_TABSZ
 				 || b < 0 || b > 65535
 				) {
 					bb_simple_error_msg_and_die("map format");
 				}
 				// patch map
 				unicodes[a] = b;
 				// unicode character is met?
 				if (b > 255)
 					mode = PIO_UNISCRNMAP;
 			}
 			if (ENABLE_FEATURE_CLEAN_UP)
 				config_close(parser);

 			if (mode != PIO_UNISCRNMAP) {
 #define asciis ((unsigned char *)map)
 				for (i = 0; i < E_TABSZ; i++)
 					asciis[i] = unicodes[i];
 #undef asciis
 			}
 #undef unicodes
 		}
 # endif // ENABLE_FEATURE_SETFONT_TEXTUAL_MAP

 		// do set screen map
 		xioctl(fd, mode, map);

 		if (ENABLE_FEATURE_CLEAN_UP)
 			free(map);
 	}

 	return EXIT_SUCCESS;
 }
 #endif
	/* vi: set sw=4 ts=4: */
	/*
	* loadfont.c - Eugene Crosser & Andries Brouwer
	*
	* Version 0.96bb
	*
	* Loads the console font, and possibly the corresponding screen map(s).
	* (Adapted for busybox by Matej Vela.)
	*
	* Licensed under GPLv2, see file LICENSE in this source tree.
	*/
	//config:config LOADFONT
	//config: bool "loadfont (5.2 kb)"
	//config: default y
	//config: select PLATFORM_LINUX
	//config: help
	//config: This program loads a console font from standard input.
	//config:
	//config:config SETFONT
	//config: bool "setfont (24 kb)"
	//config: default y
	//config: select PLATFORM_LINUX
	//config: help
	//config: Allows to load console screen map. Useful for i18n.
	//config:
	//config:config FEATURE_SETFONT_TEXTUAL_MAP
	//config: bool "Support reading textual screen maps"
	//config: default y
	//config: depends on SETFONT
	//config: help
	//config: Support reading textual screen maps.
	//config:
	//config:config DEFAULT_SETFONT_DIR
	//config: string "Default directory for console-tools files"
	//config: default ""
	//config: depends on SETFONT
	//config: help
	//config: Directory to use if setfont's params are simple filenames
	//config: (not /path/to/file or ./file). Default is "" (no default directory).
	//config:
	//config:comment "Common options for loadfont and setfont"
	//config: depends on LOADFONT \|\| SETFONT
	//config:
	//config:config FEATURE_LOADFONT_PSF2
	//config: bool "Support PSF2 console fonts"
	//config: default y
	//config: depends on LOADFONT \|\| SETFONT
	//config:
	//config:config FEATURE_LOADFONT_RAW
	//config: bool "Support old (raw) console fonts"
	//config: default y
	//config: depends on LOADFONT \|\| SETFONT

	//applet:IF_LOADFONT(APPLET_NOEXEC(loadfont, loadfont, BB_DIR_USR_SBIN, BB_SUID_DROP, loadfont))
	//applet:IF_SETFONT(APPLET_NOEXEC(setfont, setfont, BB_DIR_USR_SBIN, BB_SUID_DROP, setfont))

	//kbuild:lib-$(CONFIG_LOADFONT) += loadfont.o
	//kbuild:lib-$(CONFIG_SETFONT) += loadfont.o

	#include "libbb.h"
	#include <sys/kd.h>

	#ifndef KDFONTOP
	# define KDFONTOP 0x4B72
	struct console_font_op {
	unsigned op; /* KD_FONT_OP_* */
	unsigned flags; /* KD_FONT_FLAG_* */
	unsigned width, height;
	unsigned charcount;
	unsigned char data; / font data with height fixed to 32 */
	};
	# define KD_FONT_OP_SET 0 /* Set font */
	# define KD_FONT_OP_GET 1 /* Get font */
	# define KD_FONT_OP_SET_DEFAULT 2 /* Set font to default, data points to name / NULL */
	# define KD_FONT_OP_COPY 3 /* Copy from another console */
	# define KD_FONT_FLAG_OLD 0x80000000 /* Invoked via old interface */
	# define KD_FONT_FLAG_DONT_RECALC 1 /* Don't call adjust_height() */
	/* (Used internally for PIO_FONT support) */
	#endif /* KDFONTOP */


	enum {
	PSF1_MAGIC0 = 0x36,
	PSF1_MAGIC1 = 0x04,
	PSF1_MODE512 = 0x01,
	PSF1_MODEHASTAB = 0x02,
	PSF1_MODEHASSEQ = 0x04,
	PSF1_MAXMODE = 0x05,
	PSF1_STARTSEQ = 0xfffe,
	PSF1_SEPARATOR = 0xffff,
	};

	struct psf1_header {
	unsigned char magic[2]; /* Magic number */
	unsigned char mode; /* PSF font mode */
	unsigned char charsize; /* Character size */
	};

	#define psf1h(x) ((struct psf1_header*)(x))

	#define PSF1_MAGIC_OK(x) ( \
	(x)->magic[0] == PSF1_MAGIC0 \
	&& (x)->magic[1] == PSF1_MAGIC1 \
	)

	#if ENABLE_FEATURE_LOADFONT_PSF2
	enum {
	PSF2_MAGIC0 = 0x72,
	PSF2_MAGIC1 = 0xb5,
	PSF2_MAGIC2 = 0x4a,
	PSF2_MAGIC3 = 0x86,
	PSF2_HAS_UNICODE_TABLE = 0x01,
	PSF2_MAXVERSION = 0,
	PSF2_STARTSEQ = 0xfe,
	PSF2_SEPARATOR = 0xff
	};

	struct psf2_header {
	unsigned char magic[4];
	unsigned int version;
	unsigned int headersize; /* offset of bitmaps in file */
	unsigned int flags;
	unsigned int length; /* number of glyphs */
	unsigned int charsize; /* number of bytes for each character */
	unsigned int height; /* max dimensions of glyphs */
	unsigned int width; /* charsize = height * ((width + 7) / 8) */
	};

	#define psf2h(x) ((struct psf2_header*)(x))

	#define PSF2_MAGIC_OK(x) ( \
	(x)->magic[0] == PSF2_MAGIC0 \
	&& (x)->magic[1] == PSF2_MAGIC1 \
	&& (x)->magic[2] == PSF2_MAGIC2 \
	&& (x)->magic[3] == PSF2_MAGIC3 \
	)
	#endif /* ENABLE_FEATURE_LOADFONT_PSF2 */


	static void do_loadfont(int fd, unsigned char *inbuf, int height, int width, int charsize, int fontsize)
	{
	unsigned char *buf;
	int charwidth = 32 * ((width+7)/8);
	int i;

	if (height < 1 \|\| height > 32 \|\| width < 1 \|\| width > 32)
	bb_error_msg_and_die("bad character size %dx%d", height, width);

	buf = xzalloc(charwidth * ((fontsize < 128) ? 128 : fontsize));
	for (i = 0; i < fontsize; i++)
	memcpy(buf + (icharwidth), inbuf + (icharsize), charsize);

	{ /* KDFONTOP */
	struct console_font_op cfo;
	cfo.op = KD_FONT_OP_SET;
	cfo.flags = 0;
	cfo.width = width;
	cfo.height = height;
	cfo.charcount = fontsize;
	cfo.data = buf;
	xioctl(fd, KDFONTOP, &cfo);
	}

	free(buf);
	}

	/*
	* Format of the Unicode information:
	*
	* For each font position <uc><seq><term>
	* where <uc> is a 2-byte little endian Unicode value (PSF1)
	* or an UTF-8 coded value (PSF2),
	* <seq> = <ss><uc><uc>*, <ss> = psf1 ? 0xFFFE : 0xFE,
	* <term> = psf1 ? 0xFFFF : 0xFF.
	* and * denotes zero or more occurrences of the preceding item.
	*
	* Semantics:
	* The leading <uc>* part gives Unicode symbols that are all
	* represented by this font position. The following sequences
	* are sequences of Unicode symbols - probably a symbol
	* together with combining accents - also represented by
	* this font position.
	*
	* Example:
	* At the font position for a capital A-ring glyph, we
	* may have:
	* 00C5,212B,FFFE,0041,030A,FFFF
	* Some font positions may be described by sequences only,
	* namely when there is no precomposed Unicode value for the glyph.
	*/
	#if !ENABLE_FEATURE_LOADFONT_PSF2
	#define do_loadtable(fd, inbuf, tailsz, fontsize, psf2) \
	do_loadtable(fd, inbuf, tailsz, fontsize)
	#endif
	static void do_loadtable(int fd, unsigned char *inbuf, int tailsz, int fontsize, int psf2)
	{
	#if !ENABLE_FEATURE_LOADFONT_PSF2
	/* gcc 4.3.1 code size: */
	# define psf2 0 /* +0 bytes */
	// const int psf2 = 0; /* +8 bytes */
	// enum { psf2 = 0 }; /* +13 bytes */
	#endif
	struct unimapinit advice;
	struct unimapdesc ud;
	struct unipair *up;
	int ct = 0, maxct;
	int glyph;
	uint16_t unicode;

	maxct = tailsz; /* more than enough */
	up = xmalloc(maxct * sizeof(*up));

	for (glyph = 0; glyph < fontsize; glyph++) {
	while (tailsz > 0) {
	if (!psf2) { /* PSF1 */
	unicode = (((uint16_t) inbuf[1]) << 8) + inbuf[0];
	tailsz -= 2;
	inbuf += 2;
	if (unicode == PSF1_SEPARATOR)
	break;
	} else { /* PSF2 */
	#if ENABLE_FEATURE_LOADFONT_PSF2
	--tailsz;
	unicode = *inbuf++;
	if (unicode == PSF2_SEPARATOR) {
	break;
	} else if (unicode == PSF2_STARTSEQ) {
	bb_simple_error_msg_and_die("unicode sequences not implemented");
	} else if (unicode >= 0xC0) {
	if (unicode >= 0xFC)
	unicode &= 0x01, maxct = 5;
	else if (unicode >= 0xF8)
	unicode &= 0x03, maxct = 4;
	else if (unicode >= 0xF0)
	unicode &= 0x07, maxct = 3;
	else if (unicode >= 0xE0)
	unicode &= 0x0F, maxct = 2;
	else
	unicode &= 0x1F, maxct = 1;
	do {
	if (tailsz <= 0 \|\| inbuf < 0x80 \|\| inbuf > 0xBF)
	bb_simple_error_msg_and_die("illegal UTF-8 character");
	--tailsz;
	unicode = (unicode << 6) + (*inbuf++ & 0x3F);
	} while (--maxct > 0);
	} else if (unicode >= 0x80) {
	bb_simple_error_msg_and_die("illegal UTF-8 character");
	}
	#else
	return;
	#endif
	}
	up[ct].unicode = unicode;
	up[ct].fontpos = glyph;
	ct++;
	}
	}

	/* Note: after PIO_UNIMAPCLR and before PIO_UNIMAP
	* this printf did not work on many kernels */

	advice.advised_hashsize = 0;
	advice.advised_hashstep = 0;
	advice.advised_hashlevel = 0;
	xioctl(fd, PIO_UNIMAPCLR, &advice);
	ud.entry_ct = ct;
	ud.entries = up;
	xioctl(fd, PIO_UNIMAP, &ud);
	#undef psf2
	}

	static void do_load(int fd, unsigned char *buffer, size_t len)
	{
	int height;
	int width = 8;
	int charsize;
	int fontsize = 256;
	int has_table = 0;
	unsigned char *font = buffer;
	unsigned char *table;

	if (len >= sizeof(struct psf1_header) && PSF1_MAGIC_OK(psf1h(buffer))) {
	if (psf1h(buffer)->mode > PSF1_MAXMODE)
	bb_simple_error_msg_and_die("unsupported psf file mode");
	if (psf1h(buffer)->mode & PSF1_MODE512)
	fontsize = 512;
	if (psf1h(buffer)->mode & PSF1_MODEHASTAB)
	has_table = 1;
	height = charsize = psf1h(buffer)->charsize;
	font += sizeof(struct psf1_header);
	} else
	#if ENABLE_FEATURE_LOADFONT_PSF2
	if (len >= sizeof(struct psf2_header) && PSF2_MAGIC_OK(psf2h(buffer))) {
	if (psf2h(buffer)->version > PSF2_MAXVERSION)
	bb_simple_error_msg_and_die("unsupported psf file version");
	fontsize = psf2h(buffer)->length;
	if (psf2h(buffer)->flags & PSF2_HAS_UNICODE_TABLE)
	has_table = 2;
	charsize = psf2h(buffer)->charsize;
	height = psf2h(buffer)->height;
	width = psf2h(buffer)->width;
	font += psf2h(buffer)->headersize;
	} else
	#endif
	#if ENABLE_FEATURE_LOADFONT_RAW
	if (len == 9780) { /* file with three code pages? */
	charsize = height = 16;
	font += 40;
	} else if ((len & 0377) == 0) { /* bare font */
	charsize = height = len / 256;
	} else
	#endif
	{
	bb_simple_error_msg_and_die("input file: bad length or unsupported font type");
	}

	#if !defined(PIO_FONTX) \|\| defined(__sparc__)
	if (fontsize != 256)
	bb_simple_error_msg_and_die("only fontsize 256 supported");
	#endif

	table = font + fontsize * charsize;
	buffer += len;

	if (table > buffer \|\| (!has_table && table != buffer))
	bb_simple_error_msg_and_die("input file: bad length");

	do_loadfont(fd, font, height, width, charsize, fontsize);

	if (has_table)
	do_loadtable(fd, table, buffer - table, fontsize, has_table - 1);
	}


	#if ENABLE_LOADFONT
	//usage:#define loadfont_trivial_usage
	//usage: "< font"
	//usage:#define loadfont_full_usage "\n\n"
	//usage: "Load a console font from stdin"
	/* //usage: "\n -C TTY Affect TTY instead of /dev/tty" */
	//usage:
	//usage:#define loadfont_example_usage
	//usage: "$ loadfont < /etc/i18n/fontname\n"
	int loadfont_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
	int loadfont_main(int argc UNUSED_PARAM, char **argv)
	{
	size_t len;
	unsigned char *buffer;

	// no arguments allowed!
	getopt32(argv, "^" "" "\0" "=0");

	/*
	* We used to look at the length of the input file
	* with stat(); now that we accept compressed files,
	* just read the entire file.
	* Len was 32k, but latarcyrheb-sun32.psfu is 34377 bytes
	* (it has largish Unicode map).
	*/
	len = 128*1024;
	buffer = xmalloc_read(STDIN_FILENO, &len);
	// xmalloc_open_zipped_read_close(filename, &len);
	if (!buffer)
	bb_simple_perror_msg_and_die("error reading input font");
	do_load(get_console_fd_or_die(), buffer, len);

	return EXIT_SUCCESS;
	}
	#endif


	#if ENABLE_SETFONT
	/* kbd-1.12:
	setfont [-O font+umap.orig] [-o font.orig] [-om cmap.orig]
	[-ou umap.orig] [-N] [font.new ...] [-m cmap] [-u umap] [-C console]
	[-hNN] [-v] [-V]

	-h NN Override font height
	-o file
	Save previous font in file
	-O file
	Save previous font and Unicode map in file
	-om file
	Store console map in file
	-ou file
	Save previous Unicode map in file
	-m file
	Load console map or Unicode console map from file
	-u file
	Load Unicode table describing the font from file
	Example:
	# cp866
	0x00-0x7f idem
	#
	0x80 U+0410 # CYRILLIC CAPITAL LETTER A
	0x81 U+0411 # CYRILLIC CAPITAL LETTER BE
	0x82 U+0412 # CYRILLIC CAPITAL LETTER VE
	-C console
	Set the font for the indicated console
	-v Verbose
	-V Version
	*/
	//usage:#define setfont_trivial_usage
	//usage: "FONT [-m MAPFILE] [-C TTY]"
	//usage:#define setfont_full_usage "\n\n"
	//usage: "Load a console font\n"
	//usage: "\n -m MAPFILE Load console screen map"
	//usage: "\n -C TTY Affect TTY instead of /dev/tty"
	//usage:
	//usage:#define setfont_example_usage
	//usage: "$ setfont -m koi8-r /etc/i18n/fontname\n"

	# if ENABLE_FEATURE_SETFONT_TEXTUAL_MAP
	static int ctoi(char *s)
	{
	if (s[0] == '\'' && s[1] != '\0' && s[2] == '\'' && s[3] == '\0')
	return s[1];
	// U+ means 0x
	if (s[0] == 'U' && s[1] == '+') {
	s[0] = '0';
	s[1] = 'x';
	}
	if (!isdigit(s[0]))
	return -1;
	return xstrtoul(s, 0);
	}
	# endif

	int setfont_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
	int setfont_main(int argc UNUSED_PARAM, char **argv)
	{
	size_t len;
	unsigned opts;
	int fd;
	unsigned char *buffer;
	char *mapfilename;
	const char *tty_name = CURRENT_TTY;

	opts = getopt32(argv, "^" "m:C:" "\0" "=1", &mapfilename, &tty_name);
	argv += optind;

	fd = xopen_nonblocking(tty_name);

	if (sizeof(CONFIG_DEFAULT_SETFONT_DIR) > 1) { // if not ""
	if (*argv[0] != '/') {
	// goto default fonts location. don't die if doesn't exist
	chdir(CONFIG_DEFAULT_SETFONT_DIR "/consolefonts");
	}
	}
	// load font
	len = 128*1024;
	buffer = xmalloc_open_zipped_read_close(*argv, &len);
	if (!buffer)
	bb_simple_perror_msg_and_die(*argv);
	do_load(fd, buffer, len);

	// load the screen map, if any
	if (opts & 1) { // -m
	unsigned mode = PIO_SCRNMAP;
	void *map;

	if (sizeof(CONFIG_DEFAULT_SETFONT_DIR) > 1) { // if not ""
	if (mapfilename[0] != '/') {
	// goto default keymaps location
	chdir(CONFIG_DEFAULT_SETFONT_DIR "/consoletrans");
	}
	}
	// fetch keymap
	map = xmalloc_open_zipped_read_close(mapfilename, &len);
	if (!map)
	bb_simple_perror_msg_and_die(mapfilename);
	// file size is 256 or 512 bytes? -> assume binary map
	if (len == E_TABSZ \|\| len == 2*E_TABSZ) {
	if (len == 2*E_TABSZ)
	mode = PIO_UNISCRNMAP;
	}
	# if ENABLE_FEATURE_SETFONT_TEXTUAL_MAP
	// assume textual Unicode console maps:
	// 0x00 U+0000 # NULL (NUL)
	// 0x01 U+0001 # START OF HEADING (SOH)
	// 0x02 U+0002 # START OF TEXT (STX)
	// 0x03 U+0003 # END OF TEXT (ETX)
	else {
	int i;
	char *token[2];
	parser_t *parser;

	if (ENABLE_FEATURE_CLEAN_UP)
	free(map);
	map = xmalloc(E_TABSZ * sizeof(unsigned short));

	#define unicodes ((unsigned short *)map)
	// fill vanilla map
	for (i = 0; i < E_TABSZ; i++)
	unicodes[i] = 0xf000 + i;

	parser = config_open(mapfilename);
	while (config_read(parser, token, 2, 2, "# \t", PARSE_NORMAL \| PARSE_MIN_DIE)) {
	// parse code/value pair
	int a = ctoi(token[0]);
	int b = ctoi(token[1]);
	if (a < 0 \|\| a >= E_TABSZ
	\|\| b < 0 \|\| b > 65535
	) {
	bb_simple_error_msg_and_die("map format");
	}
	// patch map
	unicodes[a] = b;
	// unicode character is met?
	if (b > 255)
	mode = PIO_UNISCRNMAP;
	}
	if (ENABLE_FEATURE_CLEAN_UP)
	config_close(parser);

	if (mode != PIO_UNISCRNMAP) {
	#define asciis ((unsigned char *)map)
	for (i = 0; i < E_TABSZ; i++)
	asciis[i] = unicodes[i];
	#undef asciis
	}
	#undef unicodes
	}
	# endif // ENABLE_FEATURE_SETFONT_TEXTUAL_MAP

	// do set screen map
	xioctl(fd, mode, map);

	if (ENABLE_FEATURE_CLEAN_UP)
	free(map);
	}

	return EXIT_SUCCESS;
	}
	#endif