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function old new delta procps_scan 1265 1298 +33 aliascmd 278 283 +5 parse_file_cmd 116 120 +4 dname_enc 373 377 +4 setcmd 90 93 +3 execcmd 57 60 +3 count_lines 72 74 +2 process_command_subs 340 339 -1 test_main 409 407 -2 mknod_main 179 177 -2 handle_incoming_and_exit 2653 2651 -2 argstr 1312 1310 -2 shiftcmd 131 128 -3 exitcmd 46 43 -3 dotcmd 297 294 -3 breakcmd 86 83 -3 evalpipe 353 349 -4 evalcommand 1180 1176 -4 evalcmd 109 105 -4 send_tree 374 369 -5 mkfifo_main 82 77 -5 evalsubshell 152 147 -5 typecmd 75 69 -6 letcmd 61 55 -6 add_cmd 1190 1183 -7 main 891 883 -8 ash_main 1415 1407 -8 parse_stream 1377 1367 -10 alloc_procps_scan 55 - -55 ------------------------------------------------------------------------------ (add/remove: 0/1 grow/shrink: 7/21 up/down: 54/-148) Total: -94 bytes text data bss dec hex filename 797195 658 7428 805281 c49a1 busybox_old 797101 658 7428 805187 c4943 busybox_unstripped
182 lines
4.1 KiB
C
182 lines
4.1 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* loadfont.c - Eugene Crosser & Andries Brouwer
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*
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* Version 0.96bb
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*
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* Loads the console font, and possibly the corresponding screen map(s).
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* (Adapted for busybox by Matej Vela.)
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*/
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#include "libbb.h"
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#include <sys/kd.h>
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enum {
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PSF_MAGIC1 = 0x36,
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PSF_MAGIC2 = 0x04,
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PSF_MODE512 = 0x01,
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PSF_MODEHASTAB = 0x02,
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PSF_MAXMODE = 0x03,
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PSF_SEPARATOR = 0xFFFF
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};
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struct psf_header {
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unsigned char magic1, magic2; /* Magic number */
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unsigned char mode; /* PSF font mode */
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unsigned char charsize; /* Character size */
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};
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#define PSF_MAGIC_OK(x) ((x).magic1 == PSF_MAGIC1 && (x).magic2 == PSF_MAGIC2)
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static void do_loadfont(int fd, unsigned char *inbuf, int unit, int fontsize)
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{
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char *buf;
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int i;
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if (unit < 1 || unit > 32)
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bb_error_msg_and_die("bad character size %d", unit);
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buf = xzalloc(16 * 1024);
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/*memset(buf, 0, 16 * 1024);*/
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for (i = 0; i < fontsize; i++)
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memcpy(buf + (32 * i), inbuf + (unit * i), unit);
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#if defined(PIO_FONTX) && !defined(__sparc__)
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{
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struct consolefontdesc cfd;
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cfd.charcount = fontsize;
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cfd.charheight = unit;
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cfd.chardata = buf;
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if (!ioctl_or_perror(fd, PIO_FONTX, &cfd, "PIO_FONTX ioctl failed (will try PIO_FONT)"))
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goto ret; /* success */
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}
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#endif
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xioctl(fd, PIO_FONT, buf);
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ret:
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free(buf);
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}
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static void
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do_loadtable(int fd, unsigned char *inbuf, int tailsz, int fontsize)
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{
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struct unimapinit advice;
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struct unimapdesc ud;
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struct unipair *up;
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int ct = 0, maxct;
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int glyph;
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uint16_t unicode;
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maxct = tailsz; /* more than enough */
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up = xmalloc(maxct * sizeof(struct unipair));
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for (glyph = 0; glyph < fontsize; glyph++) {
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while (tailsz >= 2) {
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unicode = (((uint16_t) inbuf[1]) << 8) + inbuf[0];
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tailsz -= 2;
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inbuf += 2;
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if (unicode == PSF_SEPARATOR)
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break;
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up[ct].unicode = unicode;
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up[ct].fontpos = glyph;
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ct++;
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}
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}
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/* Note: after PIO_UNIMAPCLR and before PIO_UNIMAP
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this printf did not work on many kernels */
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advice.advised_hashsize = 0;
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advice.advised_hashstep = 0;
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advice.advised_hashlevel = 0;
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xioctl(fd, PIO_UNIMAPCLR, &advice);
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ud.entry_ct = ct;
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ud.entries = up;
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xioctl(fd, PIO_UNIMAP, &ud);
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}
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static void loadnewfont(int fd)
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{
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enum { INBUF_SIZE = 32*1024 + 1 };
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int unit;
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unsigned inputlth, offset;
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/* Was on stack, but 32k is a bit too much: */
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unsigned char *inbuf = xmalloc(INBUF_SIZE);
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/*
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* We used to look at the length of the input file
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* with stat(); now that we accept compressed files,
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* just read the entire file.
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*/
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inputlth = full_read(STDIN_FILENO, inbuf, INBUF_SIZE);
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if (inputlth < 0)
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bb_perror_msg_and_die("error reading input font");
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if (inputlth >= INBUF_SIZE)
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bb_error_msg_and_die("font too large");
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/* test for psf first */
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{
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struct psf_header psfhdr;
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int fontsize;
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int hastable;
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unsigned head0, head;
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if (inputlth < sizeof(struct psf_header))
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goto no_psf;
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psfhdr = *(struct psf_header *) &inbuf[0];
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if (!PSF_MAGIC_OK(psfhdr))
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goto no_psf;
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if (psfhdr.mode > PSF_MAXMODE)
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bb_error_msg_and_die("unsupported psf file mode");
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fontsize = ((psfhdr.mode & PSF_MODE512) ? 512 : 256);
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#if !defined(PIO_FONTX) || defined(__sparc__)
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if (fontsize != 256)
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bb_error_msg_and_die("only fontsize 256 supported");
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#endif
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hastable = (psfhdr.mode & PSF_MODEHASTAB);
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unit = psfhdr.charsize;
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head0 = sizeof(struct psf_header);
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head = head0 + fontsize * unit;
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if (head > inputlth || (!hastable && head != inputlth))
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bb_error_msg_and_die("input file: bad length");
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do_loadfont(fd, inbuf + head0, unit, fontsize);
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if (hastable)
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do_loadtable(fd, inbuf + head, inputlth - head, fontsize);
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return;
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}
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no_psf:
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/* file with three code pages? */
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if (inputlth == 9780) {
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offset = 40;
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unit = 16;
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} else {
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/* bare font */
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if (inputlth & 0377)
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bb_error_msg_and_die("bad input file size");
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offset = 0;
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unit = inputlth / 256;
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}
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do_loadfont(fd, inbuf + offset, unit, 256);
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}
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int loadfont_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int loadfont_main(int argc, char **argv ATTRIBUTE_UNUSED)
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{
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int fd;
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if (argc != 1)
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bb_show_usage();
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fd = xopen(CURRENT_VC, O_RDWR);
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loadnewfont(fd);
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return EXIT_SUCCESS;
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}
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