fixes grep, added loadfont from debian bootfloppies.

 -Erik

1 files changed, 234 insertions, 0 deletions

diff --git a/console-tools/loadfont.c b/console-tools/loadfont.c
new file mode 100644
index 000000000..a10fa8a69
--- /dev/null
+++ b/console-tools/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);
+}