Introduce od and hexdump applets

1 files changed, 270 insertions, 0 deletions

diff --git a/coreutils/od.c b/coreutils/od.c
new file mode 100644
index 0000000..681af5c
--- /dev/null
+++ b/coreutils/od.c
@@ -0,0 +1,270 @@
+/*
+ * od implementation for busybox
+ * Based on code from util-linux v 2.11l
+ *
+ * Copyright (c) 1990
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Original copyright notice is retained at the end of this file.
+ */
+
+#include <ctype.h>
+#include <getopt.h>
+#include <stdlib.h>
+#include "dump.h"
+#include "busybox.h"
+
+extern FS *fshead;				/* head of format strings */
+extern int blocksize;				/* data block size */
+extern int length;			/* max bytes to read */
+
+#define	ishexdigit(c) \
+	((c >= '0' && c <= '9') || (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F'))
+
+static void
+odoffset(int argc, char ***argvp)
+{
+	extern off_t skip;
+	register char *num, *p;
+	int base;
+	char *end;
+
+	/*
+	 * The offset syntax of od(1) was genuinely bizarre.  First, if
+	 * it started with a plus it had to be an offset.  Otherwise, if
+	 * there were at least two arguments, a number or lower-case 'x'
+	 * followed by a number makes it an offset.  By default it was
+	 * octal; if it started with 'x' or '0x' it was hex.  If it ended
+	 * in a '.', it was decimal.  If a 'b' or 'B' was appended, it
+	 * multiplied the number by 512 or 1024 byte units.  There was
+	 * no way to assign a block count to a hex offset.
+	 *
+	 * We assumes it's a file if the offset is bad.
+	 */
+	p = **argvp;
+	if (*p != '+' && (argc < 2 ||
+	    (!isdigit(p[0]) && (p[0] != 'x' || !ishexdigit(p[1])))))
+		return;
+
+	base = 0;
+	/*
+	 * skip over leading '+', 'x[0-9a-fA-f]' or '0x', and
+	 * set base.
+	 */
+	if (p[0] == '+')
+		++p;
+	if (p[0] == 'x' && ishexdigit(p[1])) {
+		++p;
+		base = 16;
+	} else if (p[0] == '0' && p[1] == 'x') {
+		p += 2;
+		base = 16;
+	}
+
+	/* skip over the number */
+	if (base == 16)
+		for (num = p; ishexdigit(*p); ++p);
+	else
+		for (num = p; isdigit(*p); ++p);
+
+	/* check for no number */
+	if (num == p)
+		return;
+
+	/* if terminates with a '.', base is decimal */
+	if (*p == '.') {
+		if (base)
+			return;
+		base = 10;
+	}
+
+	skip = strtol(num, &end, base ? base : 8);
+
+	/* if end isn't the same as p, we got a non-octal digit */
+	if (end != p)
+		skip = 0;
+	else {
+		if (*p) {
+			if (*p == 'b')
+				skip *= 512;
+			else if (*p == 'B')
+				skip *= 1024;
+			++p;
+		}
+		if (*p)
+			skip = 0;
+		else {
+			++*argvp;
+			/*
+			 * If the offset uses a non-octal base, the base of
+			 * the offset is changed as well.  This isn't pretty,
+			 * but it's easy.
+			 */
+#define	TYPE_OFFSET	7
+			if (base == 16) {
+				fshead->nextfu->fmt[TYPE_OFFSET] = 'x';
+				fshead->nextfs->nextfu->fmt[TYPE_OFFSET] = 'x';
+			} else if (base == 10) {
+				fshead->nextfu->fmt[TYPE_OFFSET] = 'd';
+				fshead->nextfs->nextfu->fmt[TYPE_OFFSET] = 'd';
+			}
+		}
+	}
+}
+
+static void odprecede(void)
+{
+	static int first = 1;
+
+	if (first) {
+		first = 0;
+		add("\"%07.7_Ao\n\"");
+		add("\"%07.7_ao  \"");
+	} else
+		add("\"         \"");
+}
+
+int od_main(int argc, char **argv)
+{
+	int ch;
+	extern enum _vflag vflag;
+	vflag = FIRST;
+	length = -1;
+
+	while ((ch = getopt(argc, argv, "aBbcDdeFfHhIiLlOoPpswvXx")) != EOF)
+		switch (ch) {
+		case 'a':
+			odprecede();
+			add("16/1 \"%3_u \" \"\\n\"");
+			break;
+		case 'B':
+		case 'o':
+			odprecede();
+			add("8/2 \" %06o \" \"\\n\"");
+			break;
+		case 'b':
+			odprecede();
+			add("16/1 \"%03o \" \"\\n\"");
+			break;
+		case 'c':
+			odprecede();
+			add("16/1 \"%3_c \" \"\\n\"");
+			break;
+		case 'd':
+			odprecede();
+			add("8/2 \"  %05u \" \"\\n\"");
+			break;
+		case 'D':
+			odprecede();
+			add("4/4 \"     %010u \" \"\\n\"");
+			break;
+		case 'e':		/* undocumented in od */
+		case 'F':
+			odprecede();
+			add("2/8 \"          %21.14e \" \"\\n\"");
+			break;
+			
+		case 'f':
+			odprecede();
+			add("4/4 \" %14.7e \" \"\\n\"");
+			break;
+		case 'H':
+		case 'X':
+			odprecede();
+			add("4/4 \"       %08x \" \"\\n\"");
+			break;
+		case 'h':
+		case 'x':
+			odprecede();
+			add("8/2 \"   %04x \" \"\\n\"");
+			break;
+		case 'I':
+		case 'L':
+		case 'l':
+			odprecede();
+			add("4/4 \"    %11d \" \"\\n\"");
+			break;
+		case 'i':
+			odprecede();
+			add("8/2 \" %6d \" \"\\n\"");
+			break;
+		case 'O':
+			odprecede();
+			add("4/4 \"    %011o \" \"\\n\"");
+			break;
+		case 'v':
+			vflag = ALL;
+			break;
+		case 'P':
+		case 'p':
+		case 's':
+		case 'w':
+		case '?':
+		default:
+			error_msg("od: od(1) has been deprecated for hexdump(1).\n");
+			if (ch != '?') {
+				error_msg("od: hexdump(1) compatibility doesn't support the -%c option%s\n",
+				    ch, ch == 's' ? "; see strings(1)." : ".");
+			}
+			show_usage();
+		}
+
+	if (!fshead) {
+		add("\"%07.7_Ao\n\"");
+		add("\"%07.7_ao  \" 8/2 \"%06o \" \"\\n\"");
+	}
+
+	argc -= optind;
+	argv += optind;
+
+	odoffset(argc, &argv);
+
+	return(dump(argv));
+}
+
+/*-
+ * Copyright (c) 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */