Kill off the loadacm applet. It is unused, unmaintained

garbage leftover from before I started maintaining BusyBox.
As the Klingon's like to say, Today is a good day to die.
 -Erik

4 files changed, 11 insertions, 362 deletions

diff --git a/console-tools/Config.in b/console-tools/Config.in
index 83694a824..e261794ab 100644
--- a/console-tools/Config.in
+++ b/console-tools/Config.in
@@ -31,12 +31,6 @@ config CONFIG_DUMPKMAP
 	  This program dumps the kernel's keyboard translation table to
 	  stdout, in binary format. You can then use loadkmap to load it.
 
-config CONFIG_LOADACM
-	bool "loadacm"
-	default n
-	help
-	  This program loads an acm from standard input.
-
 config CONFIG_LOADFONT
 	bool "loadfont"
 	default n
diff --git a/console-tools/Makefile.in b/console-tools/Makefile.in
index 1c4ac5222..032b194f6 100644
--- a/console-tools/Makefile.in
+++ b/console-tools/Makefile.in
@@ -27,7 +27,6 @@ CONSOLETOOLS_DIR-$(CONFIG_CHVT)		+= chvt.o
 CONSOLETOOLS_DIR-$(CONFIG_CLEAR)	+= clear.o
 CONSOLETOOLS_DIR-$(CONFIG_DEALLOCVT)	+= deallocvt.o
 CONSOLETOOLS_DIR-$(CONFIG_DUMPKMAP)	+= dumpkmap.o
-CONSOLETOOLS_DIR-$(CONFIG_LOADACM)	+= loadacm.o
 CONSOLETOOLS_DIR-$(CONFIG_LOADFONT)	+= loadfont.o
 CONSOLETOOLS_DIR-$(CONFIG_LOADKMAP)	+= loadkmap.o
 CONSOLETOOLS_DIR-$(CONFIG_OPENVT)	+= openvt.o
diff --git a/console-tools/loadacm.c b/console-tools/loadacm.c
deleted file mode 100644
index edaf51afb..000000000
--- a/console-tools/loadacm.c
+++ /dev/null
@@ -1,354 +0,0 @@
-/* vi: set sw=4 ts=4: */
-/*
- * Derived from
- * mapscrn.c - version 0.92
- *
- * Was taken from console-tools and adapted by 
- * Peter Novodvorsky <petya@logic.ru>
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <memory.h>
-#include <string.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <assert.h>
-#include <errno.h>
-#include <signal.h>
-#include <sys/kd.h>
-#include <sys/types.h>
-#include <sys/ioctl.h>
-#include "busybox.h"
-
-typedef unsigned short unicode;
-
-static long int ctoi(unsigned char *s, int *is_unicode);
-static int old_screen_map_read_ascii(FILE * fp, unsigned char buf[]);
-static int uni_screen_map_read_ascii(FILE * fp, unicode buf[], int *is_unicode);
-static unicode utf8_to_ucs2(char *buf);
-static int screen_map_load(int fd, FILE * fp);
-
-int loadacm_main(int argc, char **argv)
-{
-	int fd;
-
-	if (argc>=2 && *argv[1]=='-') {
-		bb_show_usage();
-	}
-
-	fd = bb_xopen(CURRENT_VC, O_RDWR);
-
-	if (screen_map_load(fd, stdin)) {
-		bb_perror_msg_and_die("Error loading acm");
-	}
-
-	write(fd, "\033(K", 3);
-
-	return EXIT_SUCCESS;
-}
-
-static int screen_map_load(int fd, FILE * fp)
-{
-	struct stat stbuf;
-	unicode wbuf[E_TABSZ];
-	unsigned char buf[E_TABSZ];
-	int parse_failed = 0;
-	int is_unicode;
-
-	if (fstat(fileno(fp), &stbuf))
-		bb_perror_msg_and_die("Cannot stat map file");
-
-	/* first try a UTF screen-map: either ASCII (no restriction) or binary (regular file) */
-	if (!
-		(parse_failed =
-		 (-1 == uni_screen_map_read_ascii(fp, wbuf, &is_unicode)))
-|| (S_ISREG(stbuf.st_mode) && (stbuf.st_size == (sizeof(unicode) * E_TABSZ)))) {	/* test for binary UTF map by size */
-		if (parse_failed) {
-			if (-1 == fseek(fp, 0, SEEK_SET)) {
-				if (errno == ESPIPE)
-					bb_error_msg_and_die("16bit screen-map MUST be a regular file.");
-				else
-					bb_perror_msg_and_die("fseek failed reading binary 16bit screen-map");
-			}
-
-			if (fread(wbuf, sizeof(unicode) * E_TABSZ, 1, fp) != 1)
-				bb_perror_msg_and_die("Cannot read [new] map from file");
-#if 0
-			else
-				bb_error_msg("Input screen-map is binary.");
-#endif
-		}
-
-		/* if it was effectively a 16-bit ASCII, OK, else try to read as 8-bit map */
-		/* same if it was binary, ie. if parse_failed */
-		if (parse_failed || is_unicode) {
-			if (ioctl(fd, PIO_UNISCRNMAP, wbuf))
-				bb_perror_msg_and_die("PIO_UNISCRNMAP ioctl");
-			else
-				return 0;
-		}
-	}
-
-	/* rewind... */
-	if (-1 == fseek(fp, 0, SEEK_SET)) {
-		if (errno == ESPIPE)
-			bb_error_msg("Assuming 8bit screen-map - MUST be a regular file."),
-				exit(1);
-		else
-			bb_perror_msg_and_die("fseek failed assuming 8bit screen-map");
-	}
-
-	/* ... and try an old 8-bit screen-map */
-	if (!(parse_failed = (-1 == old_screen_map_read_ascii(fp, buf))) ||
-		(S_ISREG(stbuf.st_mode) && (stbuf.st_size == E_TABSZ))) {	/* test for binary old 8-bit map by size */
-		if (parse_failed) {
-			if (-1 == fseek(fp, 0, SEEK_SET)) {
-				if (errno == ESPIPE)
-					/* should not - it succedeed above */
-					bb_error_msg_and_die("fseek() returned ESPIPE !");
-				else
-					bb_perror_msg_and_die("fseek for binary 8bit screen-map");
-			}
-
-			if (fread(buf, E_TABSZ, 1, fp) != 1)
-				bb_perror_msg_and_die("Cannot read [old] map from file");
-#if 0
-			else
-				bb_error_msg("Input screen-map is binary.");
-#endif
-		}
-
-		if (ioctl(fd, PIO_SCRNMAP, buf))
-			bb_perror_msg_and_die("PIO_SCRNMAP ioctl");
-		else
-			return 0;
-	}
-	bb_error_msg("Error parsing symbolic map");
-	return(1);
-}
-
-
-/*
- * - reads `fp' as a 16-bit ASCII SFM file.
- * - returns -1 on error.
- * - returns it in `unicode' in an E_TABSZ-elements array.
- * - sets `*is_unicode' flagiff there were any non-8-bit
- *   (ie. real 16-bit) mapping.
- *
- * FIXME: ignores everything after second word
- */
-static int uni_screen_map_read_ascii(FILE * fp, unicode buf[], int *is_unicode)
-{
-	char buffer[256];			/* line buffer reading file */
-	char *p, *q;				/* 1st + 2nd words in line */
-	int in, on;					/* the same, as numbers */
-	int tmp_is_unicode;			/* tmp for is_unicode calculation */
-	int i;						/* loop index - result holder */
-	int ret_code = 0;			/* return code */
-	sigset_t acmsigset, old_sigset;
-
-	assert(is_unicode);
-
-	*is_unicode = 0;
-
-	/* first 128 codes defaults to ASCII */
-	for (i = 0; i < 128; i++)
-		buf[i] = i;
-	/* remaining defaults to replacement char (usually E_TABSZ = 256) */
-	for (; i < E_TABSZ; i++)
-		buf[i] = 0xfffd;
-
-	/* block SIGCHLD */
-	sigemptyset(&acmsigset);
-	sigaddset(&acmsigset, SIGCHLD);
-	sigprocmask(SIG_BLOCK, &acmsigset, &old_sigset);
-
-	do {
-		if (NULL == fgets(buffer, sizeof(buffer), fp)) {
-			if (feof(fp))
-				break;
-			else
-				bb_perror_msg_and_die("uni_screen_map_read_ascii() can't read line");
-		}
-
-		/* get "charset-relative charcode", stripping leading spaces */
-		p = strtok(buffer, " \t\n");
-
-		/* skip empty lines and comments */
-		if (!p || *p == '#')
-			continue;
-
-		/* get unicode mapping */
-		q = strtok(NULL, " \t\n");
-		if (q) {
-			in = ctoi(p, NULL);
-			if (in < 0 || in > 255) {
-				ret_code = -1;
-				break;
-			}
-
-			on = ctoi(q, &tmp_is_unicode);
-			if (in < 0 && on > 65535) {
-				ret_code = -1;
-				break;
-			}
-
-			*is_unicode |= tmp_is_unicode;
-			buf[in] = on;
-		} else {
-			ret_code = -1;
-			break;
-		}
-	}
-	while (1);					/* terminated by break on feof() */
-
-	/* restore sig mask */
-	sigprocmask(SIG_SETMASK, &old_sigset, NULL);
-
-	return ret_code;
-}
-
-
-static int old_screen_map_read_ascii(FILE * fp, unsigned char buf[])
-{
-	char buffer[256];
-	int in, on;
-	char *p, *q;
-
-	for (in = 0; in < 256; in++)
-		buf[in] = in;
-
-	while (fgets(buffer, sizeof(buffer) - 1, fp)) {
-		p = strtok(buffer, " \t\n");
-
-		if (!p || *p == '#')
-			continue;
-
-		q = strtok(NULL, " \t\n#");
-		if (q) {
-			in = ctoi(p, NULL);
-			if (in < 0 || in > 255)
-				return -1;
-
-			on = ctoi(q, NULL);
-			if (in < 0 && on > 255)
-				return -1;
-
-			buf[in] = on;
-		} else
-			return -1;
-	}
-
-	return (0);
-}
-
-
-/*
- * - converts a string into an int.
- * - supports dec and hex bytes, hex UCS2, single-quoted byte and UTF8 chars.
- * - returns the converted value
- * - if `is_unicode != NULL', use it to tell whether it was unicode
- *
- * CAVEAT: will report valid UTF mappings using only 1 byte as 8-bit ones.
- */
-static long int ctoi(unsigned char *s, int *is_unicode)
-{
-	int i;
-	size_t ls;
-
-	ls = strlen(s);
-	if (is_unicode)
-		*is_unicode = 0;
-
-	/* hex-specified UCS2 */
-	if ((strncmp(s, "U+", 2) == 0) &&
-		(strspn(s + 2, "0123456789abcdefABCDEF") == ls - 2)) {
-		sscanf(s + 2, "%x", &i);
-		if (is_unicode)
-			*is_unicode = 1;
-	}
-
-	/* hex-specified byte */
-	else if ((ls <= 4) && (strncmp(s, "0x", 2) == 0) &&
-			 (strspn(s + 2, "0123456789abcdefABCDEF") == ls - 2))
-		sscanf(s + 2, "%x", &i);
-
-	/* oct-specified number (byte) */
-	else if ((*s == '0') && (strspn(s, "01234567") == ls))
-		sscanf(s, "%o", &i);
-
-	/* dec-specified number (byte) */
-	else if (strspn(s, "0123456789") == ls)
-		sscanf(s, "%d", &i);
-
-	/* single-byte quoted char */
-	else if ((strlen(s) == 3) && (s[0] == '\'') && (s[2] == '\''))
-		i = s[1];
-
-	/* multi-byte UTF8 quoted char */
-	else if ((s[0] == '\'') && (s[ls - 1] == '\'')) {
-		s[ls - 1] = 0;			/* ensure we'll not "parse UTF too far" */
-		i = utf8_to_ucs2(s + 1);
-		if (is_unicode)
-			*is_unicode = 1;
-	} else
-		return (-1);
-
-	return (i);
-}
-
-
-static unicode utf8_to_ucs2(char *buf)
-{
-	int utf_count = 0;
-	long utf_char = 0;
-	unicode tc = 0;
-	unsigned char c;
-
-	do {
-		c = *buf;
-		buf++;
-
-		/* if byte should be part of multi-byte sequence */
-		if (c & 0x80) {
-			/* if we have already started to parse a UTF8 sequence */
-			if (utf_count > 0 && (c & 0xc0) == 0x80) {
-				utf_char = (utf_char << 6) | (c & 0x3f);
-				utf_count--;
-				if (utf_count == 0)
-					tc = utf_char;
-				else
-					continue;
-			} else {			/* Possibly 1st char of a UTF8 sequence */
-
-				if ((c & 0xe0) == 0xc0) {
-					utf_count = 1;
-					utf_char = (c & 0x1f);
-				} else if ((c & 0xf0) == 0xe0) {
-					utf_count = 2;
-					utf_char = (c & 0x0f);
-				} else if ((c & 0xf8) == 0xf0) {
-					utf_count = 3;
-					utf_char = (c & 0x07);
-				} else if ((c & 0xfc) == 0xf8) {
-					utf_count = 4;
-					utf_char = (c & 0x03);
-				} else if ((c & 0xfe) == 0xfc) {
-					utf_count = 5;
-					utf_char = (c & 0x01);
-				} else
-					utf_count = 0;
-				continue;
-			}
-		} else {				/* not part of multi-byte sequence - treat as ASCII
-								   * this makes incomplete sequences to be ignored
-								 */
-			tc = c;
-			utf_count = 0;
-		}
-	}
-	while (utf_count);
-
-	return tc;
-}
diff --git a/console-tools/reset.c b/console-tools/reset.c
index a3f01aab0..3f9ae984d 100644
--- a/console-tools/reset.c
+++ b/console-tools/reset.c
@@ -25,11 +25,21 @@
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <unistd.h>
 #include "busybox.h"
 
 extern int reset_main(int argc, char **argv)
 {
-	printf("\033[?25h\033c\033[J");
+	if (isatty(0) || isatty(0) || isatty(0)) {
+		/* See 'man 4 console_codes' for details:
+		 * "ESC c"			-- Reset
+		 * "ESC ( K"		-- Select user mapping
+		 * "ESC [ J"		-- Erase display
+		 * "ESC [ 0 m"		-- Reset all Graphics Rendition display attributes
+		 * "ESC [ ? 25 h"	-- Make cursor visible.
+		 */
+		printf("\033c\033(K\033[J\033[0m\033[?25h");
+	}
 	return EXIT_SUCCESS;
 }