+/* vi: set sw=4 ts=4: */
/*
* loadfont.c - Eugene Crosser & Andries Brouwer
*
* 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 "libbb.h"
#include <sys/kd.h>
-#include <endian.h>
-#define PSF_MAGIC1 0x36
-#define PSF_MAGIC2 0x04
+enum {
+ PSF_MAGIC1 = 0x36,
+ 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";
+ 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 */
+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)
+static void do_loadfont(int fd, unsigned char *inbuf, int unit, int fontsize)
{
- 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];
+ char *buf;
int i;
- memset(buf,0,sizeof(buf));
-
- if (unit < 1 || unit > 32) {
- fprintf(stderr, "Bad character size %d\n", unit);
- exit(1);
- }
+ if (unit < 1 || unit > 32)
+ bb_error_msg_and_die("bad character size %d", unit);
+ buf = xzalloc(16 * 1024);
+ /*memset(buf, 0, 16 * 1024);*/
for (i = 0; i < fontsize; i++)
- memcpy(buf+(32*i), inbuf+(unit*i), unit);
+ memcpy(buf + (32 * i), inbuf + (unit * i), unit);
-#if defined( PIO_FONTX ) && !defined( sparc )
+#if defined(PIO_FONTX) && !defined(__sparc__)
{
- struct consolefontdesc cfd;
+ struct consolefontdesc cfd;
- cfd.charcount = fontsize;
- cfd.charheight = unit;
- cfd.chardata = buf;
+ 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)");
+ if (!ioctl_or_perror(fd, PIO_FONTX, &cfd, "PIO_FONTX ioctl failed (will try PIO_FONT)"))
+ goto ret; /* success */
}
#endif
- if (ioctl(fd, PIO_FONT, buf)) {
- perror("PIO_FONT ioctl error");
- exit(1);
- }
+ xioctl(fd, PIO_FONT, buf);
+ ret:
+ free(buf);
}
static void
-do_loadtable(int fd, unsigned char *inbuf, int tailsz, int fontsize) {
+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;
+ uint16_t unicode;
+
+ maxct = tailsz; /* more than enough */
+ up = xmalloc(maxct * sizeof(struct unipair));
- 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++;
- }
+ 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
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);
- }
+ xioctl(fd, PIO_UNIMAPCLR, &advice);
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);
- }
+ xioctl(fd, PIO_UNIMAP, &ud);
}
-static void
-loadnewfont(int fd) {
+static void loadnewfont(int fd)
+{
+ enum { INBUF_SIZE = 32*1024 + 1 };
+
int unit;
- char inbuf[32768]; /* primitive */
- int inputlth, offset;
+ unsigned inputlth, offset;
+ /* Was on stack, but 32k is a bit too much: */
+ unsigned char *inbuf = xmalloc(INBUF_SIZE);
/*
* 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);
- }
+ inputlth = full_read(STDIN_FILENO, inbuf, INBUF_SIZE);
+ if (inputlth < 0)
+ bb_perror_msg_and_die("error reading input font");
+ if (inputlth >= INBUF_SIZE)
+ bb_error_msg_and_die("font too large");
/* 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);
- }
+ struct psf_header psfhdr;
+ int fontsize;
+ int hastable;
+ unsigned 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)
+ bb_error_msg_and_die("unsupported psf file mode");
+ 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
- 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;
+ hastable = (psfhdr.mode & PSF_MODEHASTAB);
+ unit = psfhdr.charsize;
+ head0 = sizeof(struct psf_header);
+
+ head = head0 + fontsize * unit;
+ if (head > inputlth || (!hastable && head != inputlth))
+ bb_error_msg_and_die("input file: bad length");
+ do_loadfont(fd, inbuf + head0, unit, fontsize);
+ if (hastable)
+ do_loadtable(fd, inbuf + head, inputlth - head, fontsize);
+ return;
}
- no_psf:
+ no_psf:
/* file with three code pages? */
if (inputlth == 9780) {
- offset = 40;
- unit = 16;
+ offset = 40;
+ unit = 16;
} else {
- /* bare font */
- if (inputlth & 0377) {
- fprintf(stderr, "Bad input file size\n");
- exit(1);
- }
- offset = 0;
- unit = inputlth/256;
+ /* bare font */
+ if (inputlth & 0377)
+ bb_error_msg_and_die("bad input file size");
+ offset = 0;
+ unit = inputlth / 256;
}
- do_loadfont(fd, inbuf+offset, unit, 256);
+ do_loadfont(fd, inbuf + offset, unit, 256);
+}
+
+int loadfont_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int loadfont_main(int argc, char **argv UNUSED_PARAM)
+{
+ int fd;
+
+ if (argc != 1)
+ bb_show_usage();
+
+ fd = xopen(CURRENT_VC, O_RDWR);
+ loadnewfont(fd);
+
+ return EXIT_SUCCESS;
}
projects / oweals / busybox.git / blobdiff