busybox/console-tools/loadfont.c

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/* 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>
#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 {
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 */
};
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#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);
{ /* KDFONTOP */
struct console_font_op cfo;
cfo.op = KD_FONT_OP_SET;
cfo.flags = 0;
cfo.width = 8;
cfo.height = unit;
cfo.charcount = fontsize;
cfo.data = (void*)buf;
#if 0
if (!ioctl_or_perror(fd, KDFONTOP, &cfo, "KDFONTOP ioctl failed (will try PIO_FONTX)"))
goto ret; /* success */
#else
xioctl(fd, KDFONTOP, &cfo);
#endif
}
#if 0
/* These ones do not honour -C tty (they set font on current tty regardless)
* On x86, this distinction is visible on framebuffer consoles
* (regular character consoles may have only one shared font anyway)
*/
#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:
#endif /* 0 */
free(buf);
}
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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;
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maxct = tailsz; /* more than enough */
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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);
}
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static void do_load(int fd, struct psf_header *psfhdr, size_t len)
{
int unit;
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int fontsize;
int hastable;
unsigned head0, head = head;
/* test for psf first */
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if (len >= sizeof(struct psf_header) && PSF_MAGIC_OK(psfhdr)) {
if (psfhdr->mode > PSF_MAXMODE)
bb_error_msg_and_die("unsupported psf file mode");
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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
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hastable = (psfhdr->mode & PSF_MODEHASTAB);
unit = psfhdr->charsize;
head0 = sizeof(struct psf_header);
head = head0 + fontsize * unit;
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if (head > len || (!hastable && head != len))
bb_error_msg_and_die("input file: bad length");
} else {
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/* 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;
}
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do_loadfont(fd, (unsigned char *)psfhdr + head0, unit, fontsize);
if (hastable)
do_loadtable(fd, (unsigned char *)psfhdr + head, len - head, fontsize);
}
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#if ENABLE_LOADFONT
int loadfont_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int loadfont_main(int argc UNUSED_PARAM, char **argv)
{
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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 = xmalloc_read(STDIN_FILENO, &len);
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// 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
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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;
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struct psf_header *psfhdr;
char *mapfilename;
const char *tty_name = CURRENT_TTY;
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opt_complementary = "=1";
opts = getopt32(argv, "m:C:", &mapfilename, &tty_name);
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argv += optind;
fd = xopen(tty_name, O_NONBLOCK);
if (sizeof(CONFIG_DEFAULT_SETFONT_DIR) > 1) { // if not ""
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if (*argv[0] != '/') {
// goto default fonts location. don't die if doesn't exist
chdir(CONFIG_DEFAULT_SETFONT_DIR "/consolefonts");
}
}
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// load font
len = 32*1024; // can't be larger
psfhdr = xmalloc_open_zipped_read_close(*argv, &len);
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if (!psfhdr)
bb_simple_perror_msg_and_die(*argv);
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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 ""
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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
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if (len == E_TABSZ || len == 2*E_TABSZ) {
if (len == 2*E_TABSZ)
mode = PIO_UNISCRNMAP;
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}
#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);
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}
return EXIT_SUCCESS;
}
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#endif