setfont: new applet by Vladimir

console-tools/Config.in

@@ -95,6 +95,12 @@ config FEATURE_SETCONSOLE_LONG_OPTIONS
 	help
 	  Support long options for the setconsole applet.
 
+config SETFONT
+	bool "setfont"
+	default n
+	help
+	  Allows to load console screen map. Useful for i18n.
+
 config SETKEYCODES
 	bool "setkeycodes"
 	default n

console-tools/Kbuild

@@ -16,5 +16,6 @@ lib-$(CONFIG_LOADKMAP)		+= loadkmap.o
 lib-$(CONFIG_OPENVT)		+= openvt.o
 lib-$(CONFIG_RESET)		+= reset.o
 lib-$(CONFIG_RESIZE)		+= resize.o
+lib-$(CONFIG_SETFONT)		+= loadfont.o
 lib-$(CONFIG_SETKEYCODES)	+= setkeycodes.o
 lib-$(CONFIG_SETLOGCONS)	+= setlogcons.o

console-tools/loadfont.c

@@ -26,7 +26,7 @@ struct psf_header {
 	unsigned char charsize;         /* Character size */
 };
 
-#define PSF_MAGIC_OK(x)	((x).magic1 == PSF_MAGIC1 && (x).magic2 == PSF_MAGIC2)
+#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)
 {
@@ -37,7 +37,6 @@ static void do_loadfont(int fd, unsigned char *inbuf, int unit, int fontsize)
 		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);
 
@@ -58,8 +57,7 @@ static void do_loadfont(int fd, unsigned char *inbuf, int unit, int fontsize)
 	free(buf);
 }
 
-static void
+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;
@@ -96,86 +94,104 @@ do_loadtable(int fd, unsigned char *inbuf, int tailsz, int fontsize)
 	xioctl(fd, PIO_UNIMAP, &ud);
 }
 
-static void loadnewfont(int fd)
+static void do_load(int fd, struct psf_header *psfhdr, size_t len)
 {
-	enum { INBUF_SIZE = 32*1024 + 1 };
-
 	int unit;
-	unsigned inputlth, offset;
+	int fontsize;
-	/* Was on stack, but 32k is a bit too much: */
+	int hastable;
-	unsigned char *inbuf = xmalloc(INBUF_SIZE);
+	unsigned head0, head = head;
+
+	/* test for psf first */
+	if (len >= sizeof(struct psf_header) && PSF_MAGIC_OK(psfhdr)) {
+		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 > len || (!hastable && head != len))
+			bb_error_msg_and_die("input file: bad length");
+	} else {
+		/* 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;
+	}
+
+	do_loadfont(fd, (unsigned char *)psfhdr + head0, unit, fontsize);
+	if (hastable)
+		do_loadtable(fd, (unsigned char *)psfhdr + head, len - head, fontsize);
+}
+
+#if ENABLE_LOADFONT
+int loadfont_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int loadfont_main(int argc UNUSED_PARAM, char **argv)
+{
+	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.
 	 */
-	inputlth = full_read(STDIN_FILENO, inbuf, INBUF_SIZE);
+	len = 32*1024; // can't be larger
-	if (inputlth < 0)
+	psfhdr = (struct psf_header *) xmalloc_read(STDIN_FILENO, &len);
+	// xmalloc_open_zipped_read_close(filename, &len);
+	if (!psfhdr)
 		bb_perror_msg_and_die("error reading input font");
-	if (inputlth >= INBUF_SIZE)
+	do_load(get_console_fd_or_die(), psfhdr, len);
-		bb_error_msg_and_die("font too large");
-
-	/* test for psf first */
-	{
-		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))
-			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:
-	/* file with three code pages? */
-	if (inputlth == 9780) {
-		offset = 40;
-		unit = 16;
-	} else {
-		/* 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);
-}
-
-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 = get_console_fd_or_die();
-	loadnewfont(fd);
 
 	return EXIT_SUCCESS;
 }
+#endif
+
+#if ENABLE_SETFONT
+int setfont_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int setfont_main(int argc UNUSED_PARAM, char **argv)
+{
+	size_t len;
+	struct psf_header *psfhdr;
+	char *mapfilename;
+	int fd;
+
+	opt_complementary = "=1";
+	getopt32(argv, "m:", &mapfilename);
+	argv += optind;
+
+	// load font
+	len = 32*1024; // can't be larger
+	psfhdr = (struct psf_header *) xmalloc_open_zipped_read_close(*argv, &len);
+	fd = get_console_fd_or_die();
+	do_load(fd, psfhdr, len);
+
+	// load the screen map, if any
+	if (option_mask32 & 1) { // -m
+		void *map = xmalloc_open_zipped_read_close(mapfilename, &len);
+		if (len == E_TABSZ || len == 2*E_TABSZ) {
+			xioctl(fd, (len == 2*E_TABSZ) ? PIO_UNISCRNMAP : PIO_SCRNMAP, map);
+		}
+	}
+
+	return EXIT_SUCCESS;
+}
+#endif

include/applets.h

@@ -220,7 +220,7 @@ USE_SETARCH(APPLET_ODDNAME(linux64, setarch, _BB_DIR_BIN, _BB_SUID_NEVER, linux6
 USE_FEATURE_INITRD(APPLET_ODDNAME(linuxrc, init, _BB_DIR_ROOT, _BB_SUID_NEVER, linuxrc))
 USE_LN(APPLET_NOEXEC(ln, ln, _BB_DIR_BIN, _BB_SUID_NEVER, ln))
 USE_LOAD_POLICY(APPLET(load_policy, _BB_DIR_USR_SBIN, _BB_SUID_NEVER))
-USE_LOADFONT(APPLET(loadfont, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
+USE_LOADFONT(APPLET(loadfont, _BB_DIR_USR_SBIN, _BB_SUID_NEVER))
 USE_LOADKMAP(APPLET(loadkmap, _BB_DIR_SBIN, _BB_SUID_NEVER))
 USE_LOGGER(APPLET(logger, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
 USE_LOGIN(APPLET(login, _BB_DIR_BIN, _BB_SUID_ALWAYS))
@@ -319,6 +319,7 @@ USE_SETARCH(APPLET(setarch, _BB_DIR_BIN, _BB_SUID_NEVER))
 USE_SETCONSOLE(APPLET(setconsole, _BB_DIR_SBIN, _BB_SUID_NEVER))
 USE_SETENFORCE(APPLET(setenforce, _BB_DIR_USR_SBIN, _BB_SUID_NEVER))
 USE_SETFILES(APPLET(setfiles, _BB_DIR_SBIN, _BB_SUID_NEVER))
+USE_SETFONT(APPLET(setfont, _BB_DIR_USR_SBIN, _BB_SUID_NEVER))
 USE_SETKEYCODES(APPLET(setkeycodes, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
 USE_SETLOGCONS(APPLET(setlogcons, _BB_DIR_USR_SBIN, _BB_SUID_NEVER))
 USE_SETSEBOOL(APPLET(setsebool, _BB_DIR_USR_SBIN, _BB_SUID_NEVER))

include/usage.h

@@ -3501,6 +3501,15 @@
      "\n	-vv	Show changes in file labels, if type, role, or user are changing" \
      "\n	-W	Display warnings about entries that had no matching files" \
 
+#define setfont_trivial_usage \
+       "[-m mapfile] font"
+#define setfont_full_usage "\n\n" \
+       "Load a console font\n" \
+     "\nOptions:" \
+     "\n	-m mapfile	Load console screen map from mapfile"
+#define setfont_example_usage \
+       "$ setfont -m koi8-r /etc/i18n/fontname\n"
+
 #define setkeycodes_trivial_usage \
        "SCANCODE KEYCODE..."
 #define setkeycodes_full_usage "\n\n" \