fixes grep, added loadfont from debian bootfloppies.

 -Erik

1 files changed, 234 insertions, 0 deletions

diff --git a/loadfont.c b/loadfont.c
new file mode 100644
index 0000000..a10fa8a
--- /dev/null
+++ b/loadfont.c
@@ -0,0 +1,234 @@
+/*
+ * 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 "internal.h"
+#include <stdio.h>
+#include <string.h>
+#include <fcntl.h>
+#include <memory.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <dirent.h>
+#include <errno.h>
+#include <sys/ioctl.h>
+#include <sys/kd.h>
+#include <endian.h>
+
+#define PSF_MAGIC1	0x36
+#define PSF_MAGIC2	0x04
+
+#define PSF_MODE512    0x01
+#define PSF_MODEHASTAB 0x02
+#define PSF_MAXMODE    0x03
+#define PSF_SEPARATOR  0xFFFF
+
+static const char loadfont_usage[] = "loadfont\n"
+"\n"
+"\tLoad a console font from standard input.\n"
+"\n";
+
+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 loadnewfont(int fd);
+
+extern int
+loadfont_main(int argc, char **argv)
+{
+	int fd;
+
+	fd = open("/dev/tty0", O_RDWR);
+	if (fd < 0) {
+	    fprintf(stderr, "Error opening /dev/tty0: %s\n", strerror(errno));
+	    return 1;
+	}
+	loadnewfont(fd);
+
+	return 0;
+}
+
+static void
+do_loadfont(int fd, char *inbuf, int unit, int fontsize) {
+	char buf[16384];
+	int i;
+
+	memset(buf,0,sizeof(buf));
+
+	if (unit < 1 || unit > 32) {
+	    fprintf(stderr, "Bad character size %d\n", unit);
+	    exit(1);
+	}
+
+	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(fd, PIO_FONTX, &cfd) == 0)
+	      return;		/* success */
+	    perror("PIO_FONTX ioctl error (trying PIO_FONT)");
+	}
+#endif
+	if (ioctl(fd, PIO_FONT, buf)) {
+	    perror("PIO_FONT ioctl error");
+	    exit(1);
+	}
+}
+
+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;
+	u_short unicode;
+
+	maxct = tailsz;		/* more than enough */
+	up = (struct unipair *) malloc(maxct * sizeof(struct unipair));
+	if (!up) {
+	    fprintf(stderr, "Out of memory?\n");
+	    exit(1);
+	}
+	for (glyph = 0; glyph < fontsize; glyph++) {
+	    while (tailsz >= 2) {
+		unicode = (((u_short) 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;
+	if(ioctl(fd, PIO_UNIMAPCLR, &advice)) {
+#ifdef ENOIOCTLCMD
+	    if (errno == ENOIOCTLCMD) {
+		fprintf(stderr, "It seems this kernel is older than 1.1.92\n");
+		fprintf(stderr, "No Unicode mapping table loaded.\n");
+	    } else
+#endif
+	      perror("PIO_UNIMAPCLR");
+	    exit(1);
+	}
+	ud.entry_ct = ct;
+	ud.entries = up;
+	if(ioctl(fd, PIO_UNIMAP, &ud)) {
+#if 0
+	    if (errno == ENOMEM) {
+		/* change advice parameters */
+	    }
+#endif
+	    perror("PIO_UNIMAP");
+	    exit(1);
+	}
+}
+
+static void
+loadnewfont(int fd) {
+	int unit;
+	char inbuf[32768];	/* primitive */
+	int inputlth, offset;
+
+	/*
+	 * We used to look at the length of the input file
+	 * with stat(); now that we accept compressed files,
+	 * just read the entire file.
+	 */
+	inputlth = fread(inbuf, 1, sizeof(inbuf), stdin);
+	if (ferror(stdin)) {
+		perror("Error reading input font");
+		exit(1);
+	}
+	/* use malloc/realloc in case of giant files;
+	   maybe these do not occur: 16kB for the font,
+	   and 16kB for the map leaves 32 unicode values
+	   for each font position */
+	if (!feof(stdin)) {
+		perror("Font too large");
+		exit(1);
+	}
+
+	/* test for psf first */
+	{
+	    struct psf_header psfhdr;
+	    int fontsize;
+	    int hastable;
+	    int head0, head;
+
+	    if (inputlth < sizeof(struct psf_header))
+		goto no_psf;
+
+	    psfhdr = * (struct psf_header *) &inbuf[0];
+
+	    if (!PSF_MAGIC_OK(psfhdr))
+		goto no_psf;
+
+	    if (psfhdr.mode > PSF_MAXMODE) {
+		fprintf(stderr, "Unsupported psf file mode\n");
+		exit(1);
+	    }
+	    fontsize = ((psfhdr.mode & PSF_MODE512) ? 512 : 256);
+#if !defined( PIO_FONTX ) || defined( sparc )
+	    if (fontsize != 256) {
+		fprintf(stderr, "Only fontsize 256 supported\n");
+		exit(1);
+	    }
+#endif
+	    hastable = (psfhdr.mode & PSF_MODEHASTAB);
+	    unit = psfhdr.charsize;
+	    head0 = sizeof(struct psf_header);
+	    head = head0 + fontsize*unit;
+	    if (head > inputlth || (!hastable && head != inputlth)) {
+		fprintf(stderr, "Input file: bad length\n");
+		exit(1);
+	    }
+	    do_loadfont(fd, inbuf + head0, unit, fontsize);
+	    if (hastable)
+	      do_loadtable(fd, inbuf + head, inputlth-head, fontsize);
+	    return;
+	}
+      no_psf:
+
+	/* file with three code pages? */
+	if (inputlth == 9780) {
+	    offset = 40;
+	    unit = 16;
+	} else {
+	    /* bare font */
+	    if (inputlth & 0377) {
+		fprintf(stderr, "Bad input file size\n");
+		exit(1);
+	    }
+	    offset = 0;
+	    unit = inputlth/256;
+	}
+	do_loadfont(fd, inbuf+offset, unit, 256);
+}