console-tools/loadfont.c - codeaurora/busybox - Gitiles

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

 enum {
 	PSF_MAGIC1 = 0x36,
 	PSF_MAGIC2 = 0x04,

 	PSF_MODE512 = 0x01,
 	PSF_MODEHASTAB = 0x02,
 	PSF_MAXMODE = 0x03,
 	PSF_SEPARATOR = 0xffff
 };

 struct psf_header {
 	unsigned char magic1, magic2;   /* Magic number */
 	unsigned char mode;             /* PSF font mode */
 	unsigned char charsize;         /* Character size */
 };

 #define PSF_MAGIC_OK(x)	((x)->magic1 == PSF_MAGIC1 && (x)->magic2 == PSF_MAGIC2)

 static void do_loadfont(int fd, unsigned char *inbuf, int unit, int fontsize)
 {
 	char *buf;
 	int i;

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

 	buf = xzalloc(16 * 1024);
 	for (i = 0; i < fontsize; i++)
 		memcpy(buf + (32 * i), inbuf + (unit * i), unit);

 #if defined(PIO_FONTX) && !defined(__sparc__)
 	{
 		struct consolefontdesc cfd;

 		cfd.charcount = fontsize;
 		cfd.charheight = unit;
 		cfd.chardata = buf;

 		if (!ioctl_or_perror(fd, PIO_FONTX, &cfd, "PIO_FONTX ioctl failed (will try PIO_FONT)"))
 			goto ret;			/* success */
 	}
 #endif
 	xioctl(fd, PIO_FONT, buf);
  ret:
 	free(buf);
 }

 static void do_loadtable(int fd, unsigned char *inbuf, int tailsz, int fontsize)
 {
 	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(struct unipair));

 	for (glyph = 0; glyph < fontsize; glyph++) {
 		while (tailsz >= 2) {
 			unicode = (((uint16_t) inbuf[1]) << 8) + inbuf[0];
 			tailsz -= 2;
 			inbuf += 2;
 			if (unicode == PSF_SEPARATOR)
 				break;
 			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);
 }

 static void do_load(int fd, struct psf_header *psfhdr, size_t len)
 {
 	int unit;
 	int fontsize;
 	int hastable;
 	unsigned head0, head = head;

 	/* test for psf first */
 	if (len >= sizeof(struct psf_header) && PSF_MAGIC_OK(psfhdr)) {
 		if (psfhdr->mode > PSF_MAXMODE)
 			bb_error_msg_and_die("unsupported psf file mode");
 		fontsize = ((psfhdr->mode & PSF_MODE512) ? 512 : 256);
 #if !defined(PIO_FONTX) || defined(__sparc__)
 		if (fontsize != 256)
 			bb_error_msg_and_die("only fontsize 256 supported");
 #endif
 		hastable = (psfhdr->mode & PSF_MODEHASTAB);
 		unit = psfhdr->charsize;
 		head0 = sizeof(struct psf_header);

 		head = head0 + fontsize * unit;
 		if (head > len || (!hastable && head != len))
 			bb_error_msg_and_die("input file: bad length");
 	} else {
 		/* file with three code pages? */
 		if (len == 9780) {
 			head0 = 40;
 			unit = 16;
 		} else {
 			/* bare font */
 			if (len & 0377)
 				bb_error_msg_and_die("input file: bad length");
 			head0 = 0;
 			unit = len / 256;
 		}
 		fontsize = 256;
 		hastable = 0;
 	}

 	do_loadfont(fd, (unsigned char *)psfhdr + head0, unit, fontsize);
 	if (hastable)
 		do_loadtable(fd, (unsigned char *)psfhdr + head, len - head, fontsize);
 }

 #if ENABLE_LOADFONT
 int loadfont_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int loadfont_main(int argc UNUSED_PARAM, char **argv)
 {
 	size_t len;
 	struct psf_header *psfhdr;

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

 	/*
 	 * 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 = 32*1024; // can't be larger
 	psfhdr = (struct psf_header *) xmalloc_read(STDIN_FILENO, &len);
 	// xmalloc_open_zipped_read_close(filename, &len);
 	if (!psfhdr)
 		bb_perror_msg_and_die("error reading input font");
 	do_load(get_console_fd_or_die(), psfhdr, 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
 */

 #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;
 	struct psf_header *psfhdr;
 	char *mapfilename;
 	const char *tty_name = CURRENT_TTY;

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

 	fd = xopen(tty_name, O_NONBLOCK);

 	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 = 32*1024; // can't be larger
 	psfhdr = (struct psf_header *) xmalloc_open_zipped_read_close(*argv, &len);
 	if (!psfhdr)
 		bb_simple_perror_msg_and_die(*argv);
 	do_load(fd, psfhdr, 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_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.)
	*/
	#include "libbb.h"
	#include <sys/kd.h>

	enum {
	PSF_MAGIC1 = 0x36,
	PSF_MAGIC2 = 0x04,

	PSF_MODE512 = 0x01,
	PSF_MODEHASTAB = 0x02,
	PSF_MAXMODE = 0x03,
	PSF_SEPARATOR = 0xffff
	};

	struct psf_header {
	unsigned char magic1, magic2; /* Magic number */
	unsigned char mode; /* PSF font mode */
	unsigned char charsize; /* Character size */
	};

	#define PSF_MAGIC_OK(x) ((x)->magic1 == PSF_MAGIC1 && (x)->magic2 == PSF_MAGIC2)

	static void do_loadfont(int fd, unsigned char *inbuf, int unit, int fontsize)
	{
	char *buf;
	int i;

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

	buf = xzalloc(16 * 1024);
	for (i = 0; i < fontsize; i++)
	memcpy(buf + (32 * i), inbuf + (unit * i), unit);

	#if defined(PIO_FONTX) && !defined(__sparc__)
	{
	struct consolefontdesc cfd;

	cfd.charcount = fontsize;
	cfd.charheight = unit;
	cfd.chardata = buf;

	if (!ioctl_or_perror(fd, PIO_FONTX, &cfd, "PIO_FONTX ioctl failed (will try PIO_FONT)"))
	goto ret; /* success */
	}
	#endif
	xioctl(fd, PIO_FONT, buf);
	ret:
	free(buf);
	}

	static void do_loadtable(int fd, unsigned char *inbuf, int tailsz, int fontsize)
	{
	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(struct unipair));

	for (glyph = 0; glyph < fontsize; glyph++) {
	while (tailsz >= 2) {
	unicode = (((uint16_t) inbuf[1]) << 8) + inbuf[0];
	tailsz -= 2;
	inbuf += 2;
	if (unicode == PSF_SEPARATOR)
	break;
	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);
	}

	static void do_load(int fd, struct psf_header *psfhdr, size_t len)
	{
	int unit;
	int fontsize;
	int hastable;
	unsigned head0, head = head;

	/* test for psf first */
	if (len >= sizeof(struct psf_header) && PSF_MAGIC_OK(psfhdr)) {
	if (psfhdr->mode > PSF_MAXMODE)
	bb_error_msg_and_die("unsupported psf file mode");
	fontsize = ((psfhdr->mode & PSF_MODE512) ? 512 : 256);
	#if !defined(PIO_FONTX) \|\| defined(__sparc__)
	if (fontsize != 256)
	bb_error_msg_and_die("only fontsize 256 supported");
	#endif
	hastable = (psfhdr->mode & PSF_MODEHASTAB);
	unit = psfhdr->charsize;
	head0 = sizeof(struct psf_header);

	head = head0 + fontsize * unit;
	if (head > len \|\| (!hastable && head != len))
	bb_error_msg_and_die("input file: bad length");
	} else {
	/* file with three code pages? */
	if (len == 9780) {
	head0 = 40;
	unit = 16;
	} else {
	/* bare font */
	if (len & 0377)
	bb_error_msg_and_die("input file: bad length");
	head0 = 0;
	unit = len / 256;
	}
	fontsize = 256;
	hastable = 0;
	}

	do_loadfont(fd, (unsigned char *)psfhdr + head0, unit, fontsize);
	if (hastable)
	do_loadtable(fd, (unsigned char *)psfhdr + head, len - head, fontsize);
	}

	#if ENABLE_LOADFONT
	int loadfont_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
	int loadfont_main(int argc UNUSED_PARAM, char **argv)
	{
	size_t len;
	struct psf_header *psfhdr;

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

	/*
	* 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 = 32*1024; // can't be larger
	psfhdr = (struct psf_header *) xmalloc_read(STDIN_FILENO, &len);
	// xmalloc_open_zipped_read_close(filename, &len);
	if (!psfhdr)
	bb_perror_msg_and_die("error reading input font");
	do_load(get_console_fd_or_die(), psfhdr, 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
	*/

	#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;
	struct psf_header *psfhdr;
	char *mapfilename;
	const char *tty_name = CURRENT_TTY;

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

	fd = xopen(tty_name, O_NONBLOCK);

	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 = 32*1024; // can't be larger
	psfhdr = (struct psf_header ) xmalloc_open_zipped_read_close(argv, &len);
	if (!psfhdr)
	bb_simple_perror_msg_and_die(*argv);
	do_load(fd, psfhdr, 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_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