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1/* vi: set sw=4 ts=4: */
2/*
3 * loadfont.c - Eugene Crosser & Andries Brouwer
4 *
5 * Version 0.96bb
6 *
7 * Loads the console font, and possibly the corresponding screen map(s).
8 * (Adapted for busybox by Matej Vela.)
9 *
10 * Licensed under GPLv2, see file LICENSE in this source tree.
11 */
12//config:config LOADFONT
13//config: bool "loadfont"
14//config: default y
15//config: select PLATFORM_LINUX
16//config: help
17//config: This program loads a console font from standard input.
18//config:
19//config:config SETFONT
20//config: bool "setfont"
21//config: default y
22//config: select PLATFORM_LINUX
23//config: help
24//config: Allows to load console screen map. Useful for i18n.
25//config:
26//config:config FEATURE_SETFONT_TEXTUAL_MAP
27//config: bool "Support reading textual screen maps"
28//config: default y
29//config: depends on SETFONT
30//config: help
31//config: Support reading textual screen maps.
32//config:
33//config:config DEFAULT_SETFONT_DIR
34//config: string "Default directory for console-tools files"
35//config: default ""
36//config: depends on SETFONT
37//config: help
38//config: Directory to use if setfont's params are simple filenames
39//config: (not /path/to/file or ./file). Default is "" (no default directory).
40//config:
41//config:comment "Common options for loadfont and setfont"
42//config: depends on LOADFONT || SETFONT
43//config:
44//config:config FEATURE_LOADFONT_PSF2
45//config: bool "Support for PSF2 console fonts"
46//config: default y
47//config: depends on LOADFONT || SETFONT
48//config: help
49//config: Support PSF2 console fonts.
50//config:
51//config:config FEATURE_LOADFONT_RAW
52//config: bool "Support for old (raw) console fonts"
53//config: default y
54//config: depends on LOADFONT || SETFONT
55//config: help
56//config: Support old (raw) console fonts.
57
58//applet:IF_LOADFONT(APPLET(loadfont, BB_DIR_USR_SBIN, BB_SUID_DROP))
59//applet:IF_SETFONT(APPLET(setfont, BB_DIR_USR_SBIN, BB_SUID_DROP))
60
61//kbuild:lib-$(CONFIG_LOADFONT) += loadfont.o
62//kbuild:lib-$(CONFIG_SETFONT) += loadfont.o
63
64//usage:#define loadfont_trivial_usage
65//usage: "< font"
66//usage:#define loadfont_full_usage "\n\n"
67//usage: "Load a console font from stdin"
68/* //usage: "\n -C TTY Affect TTY instead of /dev/tty" */
69//usage:
70//usage:#define loadfont_example_usage
71//usage: "$ loadfont < /etc/i18n/fontname\n"
72//usage:
73//usage:#define setfont_trivial_usage
74//usage: "FONT [-m MAPFILE] [-C TTY]"
75//usage:#define setfont_full_usage "\n\n"
76//usage: "Load a console font\n"
77//usage: "\n -m MAPFILE Load console screen map"
78//usage: "\n -C TTY Affect TTY instead of /dev/tty"
79//usage:
80//usage:#define setfont_example_usage
81//usage: "$ setfont -m koi8-r /etc/i18n/fontname\n"
82
83#include "libbb.h"
84#include <sys/kd.h>
85
86#ifndef KDFONTOP
87# define KDFONTOP 0x4B72
88struct console_font_op {
89 unsigned op; /* KD_FONT_OP_* */
90 unsigned flags; /* KD_FONT_FLAG_* */
91 unsigned width, height;
92 unsigned charcount;
93 unsigned char *data; /* font data with height fixed to 32 */
94};
95# define KD_FONT_OP_SET 0 /* Set font */
96# define KD_FONT_OP_GET 1 /* Get font */
97# define KD_FONT_OP_SET_DEFAULT 2 /* Set font to default, data points to name / NULL */
98# define KD_FONT_OP_COPY 3 /* Copy from another console */
99# define KD_FONT_FLAG_OLD 0x80000000 /* Invoked via old interface */
100# define KD_FONT_FLAG_DONT_RECALC 1 /* Don't call adjust_height() */
101 /* (Used internally for PIO_FONT support) */
102#endif /* KDFONTOP */
103
104
105enum {
106 PSF1_MAGIC0 = 0x36,
107 PSF1_MAGIC1 = 0x04,
108 PSF1_MODE512 = 0x01,
109 PSF1_MODEHASTAB = 0x02,
110 PSF1_MODEHASSEQ = 0x04,
111 PSF1_MAXMODE = 0x05,
112 PSF1_STARTSEQ = 0xfffe,
113 PSF1_SEPARATOR = 0xffff,
114};
115
116struct psf1_header {
117 unsigned char magic[2]; /* Magic number */
118 unsigned char mode; /* PSF font mode */
119 unsigned char charsize; /* Character size */
120};
121
122#define psf1h(x) ((struct psf1_header*)(x))
123
124#define PSF1_MAGIC_OK(x) ( \
125 (x)->magic[0] == PSF1_MAGIC0 \
126 && (x)->magic[1] == PSF1_MAGIC1 \
127)
128
129#if ENABLE_FEATURE_LOADFONT_PSF2
130enum {
131 PSF2_MAGIC0 = 0x72,
132 PSF2_MAGIC1 = 0xb5,
133 PSF2_MAGIC2 = 0x4a,
134 PSF2_MAGIC3 = 0x86,
135 PSF2_HAS_UNICODE_TABLE = 0x01,
136 PSF2_MAXVERSION = 0,
137 PSF2_STARTSEQ = 0xfe,
138 PSF2_SEPARATOR = 0xff
139};
140
141struct psf2_header {
142 unsigned char magic[4];
143 unsigned int version;
144 unsigned int headersize; /* offset of bitmaps in file */
145 unsigned int flags;
146 unsigned int length; /* number of glyphs */
147 unsigned int charsize; /* number of bytes for each character */
148 unsigned int height; /* max dimensions of glyphs */
149 unsigned int width; /* charsize = height * ((width + 7) / 8) */
150};
151
152#define psf2h(x) ((struct psf2_header*)(x))
153
154#define PSF2_MAGIC_OK(x) ( \
155 (x)->magic[0] == PSF2_MAGIC0 \
156 && (x)->magic[1] == PSF2_MAGIC1 \
157 && (x)->magic[2] == PSF2_MAGIC2 \
158 && (x)->magic[3] == PSF2_MAGIC3 \
159)
160#endif /* ENABLE_FEATURE_LOADFONT_PSF2 */
161
162
163static void do_loadfont(int fd, unsigned char *inbuf, int height, int width, int charsize, int fontsize)
164{
165 unsigned char *buf;
166 int charwidth = 32 * ((width+7)/8);
167 int i;
168
169 if (height < 1 || height > 32 || width < 1 || width > 32)
170 bb_error_msg_and_die("bad character size %dx%d", height, width);
171
172 buf = xzalloc(charwidth * ((fontsize < 128) ? 128 : fontsize));
173 for (i = 0; i < fontsize; i++)
174 memcpy(buf + (i*charwidth), inbuf + (i*charsize), charsize);
175
176 { /* KDFONTOP */
177 struct console_font_op cfo;
178 cfo.op = KD_FONT_OP_SET;
179 cfo.flags = 0;
180 cfo.width = width;
181 cfo.height = height;
182 cfo.charcount = fontsize;
183 cfo.data = buf;
184 xioctl(fd, KDFONTOP, &cfo);
185 }
186
187 free(buf);
188}
189
190/*
191 * Format of the Unicode information:
192 *
193 * For each font position <uc>*<seq>*<term>
194 * where <uc> is a 2-byte little endian Unicode value (PSF1)
195 * or an UTF-8 coded value (PSF2),
196 * <seq> = <ss><uc><uc>*, <ss> = psf1 ? 0xFFFE : 0xFE,
197 * <term> = psf1 ? 0xFFFF : 0xFF.
198 * and * denotes zero or more occurrences of the preceding item.
199 *
200 * Semantics:
201 * The leading <uc>* part gives Unicode symbols that are all
202 * represented by this font position. The following sequences
203 * are sequences of Unicode symbols - probably a symbol
204 * together with combining accents - also represented by
205 * this font position.
206 *
207 * Example:
208 * At the font position for a capital A-ring glyph, we
209 * may have:
210 * 00C5,212B,FFFE,0041,030A,FFFF
211 * Some font positions may be described by sequences only,
212 * namely when there is no precomposed Unicode value for the glyph.
213 */
214#if !ENABLE_FEATURE_LOADFONT_PSF2
215#define do_loadtable(fd, inbuf, tailsz, fontsize, psf2) \
216 do_loadtable(fd, inbuf, tailsz, fontsize)
217#endif
218static void do_loadtable(int fd, unsigned char *inbuf, int tailsz, int fontsize, int psf2)
219{
220#if !ENABLE_FEATURE_LOADFONT_PSF2
221/* gcc 4.3.1 code size: */
222# define psf2 0 /* +0 bytes */
223// const int psf2 = 0; /* +8 bytes */
224// enum { psf2 = 0 }; /* +13 bytes */
225#endif
226 struct unimapinit advice;
227 struct unimapdesc ud;
228 struct unipair *up;
229 int ct = 0, maxct;
230 int glyph;
231 uint16_t unicode;
232
233 maxct = tailsz; /* more than enough */
234 up = xmalloc(maxct * sizeof(*up));
235
236 for (glyph = 0; glyph < fontsize; glyph++) {
237 while (tailsz > 0) {
238 if (!psf2) { /* PSF1 */
239 unicode = (((uint16_t) inbuf[1]) << 8) + inbuf[0];
240 tailsz -= 2;
241 inbuf += 2;
242 if (unicode == PSF1_SEPARATOR)
243 break;
244 } else { /* PSF2 */
245#if ENABLE_FEATURE_LOADFONT_PSF2
246 --tailsz;
247 unicode = *inbuf++;
248 if (unicode == PSF2_SEPARATOR) {
249 break;
250 } else if (unicode == PSF2_STARTSEQ) {
251 bb_error_msg_and_die("unicode sequences not implemented");
252 } else if (unicode >= 0xC0) {
253 if (unicode >= 0xFC)
254 unicode &= 0x01, maxct = 5;
255 else if (unicode >= 0xF8)
256 unicode &= 0x03, maxct = 4;
257 else if (unicode >= 0xF0)
258 unicode &= 0x07, maxct = 3;
259 else if (unicode >= 0xE0)
260 unicode &= 0x0F, maxct = 2;
261 else
262 unicode &= 0x1F, maxct = 1;
263 do {
264 if (tailsz <= 0 || *inbuf < 0x80 || *inbuf > 0xBF)
265 bb_error_msg_and_die("illegal UTF-8 character");
266 --tailsz;
267 unicode = (unicode << 6) + (*inbuf++ & 0x3F);
268 } while (--maxct > 0);
269 } else if (unicode >= 0x80) {
270 bb_error_msg_and_die("illegal UTF-8 character");
271 }
272#else
273 return;
274#endif
275 }
276 up[ct].unicode = unicode;
277 up[ct].fontpos = glyph;
278 ct++;
279 }
280 }
281
282 /* Note: after PIO_UNIMAPCLR and before PIO_UNIMAP
283 * this printf did not work on many kernels */
284
285 advice.advised_hashsize = 0;
286 advice.advised_hashstep = 0;
287 advice.advised_hashlevel = 0;
288 xioctl(fd, PIO_UNIMAPCLR, &advice);
289 ud.entry_ct = ct;
290 ud.entries = up;
291 xioctl(fd, PIO_UNIMAP, &ud);
292#undef psf2
293}
294
295static void do_load(int fd, unsigned char *buffer, size_t len)
296{
297 int height;
298 int width = 8;
299 int charsize;
300 int fontsize = 256;
301 int has_table = 0;
302 unsigned char *font = buffer;
303 unsigned char *table;
304
305 if (len >= sizeof(struct psf1_header) && PSF1_MAGIC_OK(psf1h(buffer))) {
306 if (psf1h(buffer)->mode > PSF1_MAXMODE)
307 bb_error_msg_and_die("unsupported psf file mode");
308 if (psf1h(buffer)->mode & PSF1_MODE512)
309 fontsize = 512;
310 if (psf1h(buffer)->mode & PSF1_MODEHASTAB)
311 has_table = 1;
312 height = charsize = psf1h(buffer)->charsize;
313 font += sizeof(struct psf1_header);
314 } else
315#if ENABLE_FEATURE_LOADFONT_PSF2
316 if (len >= sizeof(struct psf2_header) && PSF2_MAGIC_OK(psf2h(buffer))) {
317 if (psf2h(buffer)->version > PSF2_MAXVERSION)
318 bb_error_msg_and_die("unsupported psf file version");
319 fontsize = psf2h(buffer)->length;
320 if (psf2h(buffer)->flags & PSF2_HAS_UNICODE_TABLE)
321 has_table = 2;
322 charsize = psf2h(buffer)->charsize;
323 height = psf2h(buffer)->height;
324 width = psf2h(buffer)->width;
325 font += psf2h(buffer)->headersize;
326 } else
327#endif
328#if ENABLE_FEATURE_LOADFONT_RAW
329 if (len == 9780) { /* file with three code pages? */
330 charsize = height = 16;
331 font += 40;
332 } else if ((len & 0377) == 0) { /* bare font */
333 charsize = height = len / 256;
334 } else
335#endif
336 {
337 bb_error_msg_and_die("input file: bad length or unsupported font type");
338 }
339
340#if !defined(PIO_FONTX) || defined(__sparc__)
341 if (fontsize != 256)
342 bb_error_msg_and_die("only fontsize 256 supported");
343#endif
344
345 table = font + fontsize * charsize;
346 buffer += len;
347
348 if (table > buffer || (!has_table && table != buffer))
349 bb_error_msg_and_die("input file: bad length");
350
351 do_loadfont(fd, font, height, width, charsize, fontsize);
352
353 if (has_table)
354 do_loadtable(fd, table, buffer - table, fontsize, has_table - 1);
355}
356
357
358#if ENABLE_LOADFONT
359int loadfont_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
360int loadfont_main(int argc UNUSED_PARAM, char **argv)
361{
362 size_t len;
363 unsigned char *buffer;
364
365 // no arguments allowed!
366 opt_complementary = "=0";
367 getopt32(argv, "");
368
369 /*
370 * We used to look at the length of the input file
371 * with stat(); now that we accept compressed files,
372 * just read the entire file.
373 * Len was 32k, but latarcyrheb-sun32.psfu is 34377 bytes
374 * (it has largish Unicode map).
375 */
376 len = 128*1024;
377 buffer = xmalloc_read(STDIN_FILENO, &len);
378 // xmalloc_open_zipped_read_close(filename, &len);
379 if (!buffer)
380 bb_perror_msg_and_die("error reading input font");
381 do_load(get_console_fd_or_die(), buffer, len);
382
383 return EXIT_SUCCESS;
384}
385#endif
386
387#if ENABLE_SETFONT
388
389/*
390kbd-1.12:
391
392setfont [-O font+umap.orig] [-o font.orig] [-om cmap.orig]
393[-ou umap.orig] [-N] [font.new ...] [-m cmap] [-u umap] [-C console]
394[-hNN] [-v] [-V]
395
396-h NN Override font height
397-o file
398 Save previous font in file
399-O file
400 Save previous font and Unicode map in file
401-om file
402 Store console map in file
403-ou file
404 Save previous Unicode map in file
405-m file
406 Load console map or Unicode console map from file
407-u file
408 Load Unicode table describing the font from file
409 Example:
410 # cp866
411 0x00-0x7f idem
412 #
413 0x80 U+0410 # CYRILLIC CAPITAL LETTER A
414 0x81 U+0411 # CYRILLIC CAPITAL LETTER BE
415 0x82 U+0412 # CYRILLIC CAPITAL LETTER VE
416-C console
417 Set the font for the indicated console
418-v Verbose
419-V Version
420*/
421
422#if ENABLE_FEATURE_SETFONT_TEXTUAL_MAP
423static int ctoi(char *s)
424{
425 if (s[0] == '\'' && s[1] != '\0' && s[2] == '\'' && s[3] == '\0')
426 return s[1];
427 // U+ means 0x
428 if (s[0] == 'U' && s[1] == '+') {
429 s[0] = '0';
430 s[1] = 'x';
431 }
432 if (!isdigit(s[0]))
433 return -1;
434 return xstrtoul(s, 0);
435}
436#endif
437
438int setfont_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
439int setfont_main(int argc UNUSED_PARAM, char **argv)
440{
441 size_t len;
442 unsigned opts;
443 int fd;
444 unsigned char *buffer;
445 char *mapfilename;
446 const char *tty_name = CURRENT_TTY;
447
448 opt_complementary = "=1";
449 opts = getopt32(argv, "m:C:", &mapfilename, &tty_name);
450 argv += optind;
451
452 fd = xopen_nonblocking(tty_name);
453
454 if (sizeof(CONFIG_DEFAULT_SETFONT_DIR) > 1) { // if not ""
455 if (*argv[0] != '/') {
456 // goto default fonts location. don't die if doesn't exist
457 chdir(CONFIG_DEFAULT_SETFONT_DIR "/consolefonts");
458 }
459 }
460 // load font
461 len = 128*1024;
462 buffer = xmalloc_open_zipped_read_close(*argv, &len);
463 if (!buffer)
464 bb_simple_perror_msg_and_die(*argv);
465 do_load(fd, buffer, len);
466
467 // load the screen map, if any
468 if (opts & 1) { // -m
469 unsigned mode = PIO_SCRNMAP;
470 void *map;
471
472 if (sizeof(CONFIG_DEFAULT_SETFONT_DIR) > 1) { // if not ""
473 if (mapfilename[0] != '/') {
474 // goto default keymaps location
475 chdir(CONFIG_DEFAULT_SETFONT_DIR "/consoletrans");
476 }
477 }
478 // fetch keymap
479 map = xmalloc_open_zipped_read_close(mapfilename, &len);
480 if (!map)
481 bb_simple_perror_msg_and_die(mapfilename);
482 // file size is 256 or 512 bytes? -> assume binary map
483 if (len == E_TABSZ || len == 2*E_TABSZ) {
484 if (len == 2*E_TABSZ)
485 mode = PIO_UNISCRNMAP;
486 }
487#if ENABLE_FEATURE_SETFONT_TEXTUAL_MAP
488 // assume textual Unicode console maps:
489 // 0x00 U+0000 # NULL (NUL)
490 // 0x01 U+0001 # START OF HEADING (SOH)
491 // 0x02 U+0002 # START OF TEXT (STX)
492 // 0x03 U+0003 # END OF TEXT (ETX)
493 else {
494 int i;
495 char *token[2];
496 parser_t *parser;
497
498 if (ENABLE_FEATURE_CLEAN_UP)
499 free(map);
500 map = xmalloc(E_TABSZ * sizeof(unsigned short));
501
502#define unicodes ((unsigned short *)map)
503 // fill vanilla map
504 for (i = 0; i < E_TABSZ; i++)
505 unicodes[i] = 0xf000 + i;
506
507 parser = config_open(mapfilename);
508 while (config_read(parser, token, 2, 2, "# \t", PARSE_NORMAL | PARSE_MIN_DIE)) {
509 // parse code/value pair
510 int a = ctoi(token[0]);
511 int b = ctoi(token[1]);
512 if (a < 0 || a >= E_TABSZ
513 || b < 0 || b > 65535
514 ) {
515 bb_error_msg_and_die("map format");
516 }
517 // patch map
518 unicodes[a] = b;
519 // unicode character is met?
520 if (b > 255)
521 mode = PIO_UNISCRNMAP;
522 }
523 if (ENABLE_FEATURE_CLEAN_UP)
524 config_close(parser);
525
526 if (mode != PIO_UNISCRNMAP) {
527#define asciis ((unsigned char *)map)
528 for (i = 0; i < E_TABSZ; i++)
529 asciis[i] = unicodes[i];
530#undef asciis
531 }
532#undef unicodes
533 }
534#endif // ENABLE_FEATURE_SETFONT_TEXTUAL_MAP
535
536 // do set screen map
537 xioctl(fd, mode, map);
538
539 if (ENABLE_FEATURE_CLEAN_UP)
540 free(map);
541 }
542
543 return EXIT_SUCCESS;
544}
545#endif
546
generated by cgit at 2024-05-15 13:18:59 (GMT)