1 files changed, 101 insertions, 0 deletions
diff --git a/util-linux/hexdump.c b/util-linux/hexdump.c
new file mode 100644
index 000000000..5cb245feb
--- /dev/null
+++ b/util-linux/hexdump.c
@@ -0,0 +1,101 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * hexdump implementation for busybox
+ * Based on code from util-linux v 2.11l
+ *
+ * Copyright (c) 1989
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Licensed under GPLv2 or later, see file License in this tarball for details.
+ */
+
+#include "busybox.h"
+#include <getopt.h>
+#include "dump.h"
+
+static void bb_dump_addfile(char *name)
+{
+	char *p;
+	FILE *fp;
+	char *buf;
+
+	fp = xfopen(name, "r");
+
+	while ((buf = xmalloc_getline(fp)) != NULL) {
+		p = skip_whitespace(buf);
+
+		if (*p && (*p != '#')) {
+			bb_dump_add(p);
+		}
+		free(buf);
+	}
+	fclose(fp);
+}
+
+static const char * const add_strings[] = {
+	"\"%07.7_ax \" 16/1 \"%03o \" \"\\n\"",		/* b */
+	"\"%07.7_ax \" 16/1 \"%3_c \" \"\\n\"",		/* c */
+	"\"%07.7_ax \" 8/2 \"  %05u \" \"\\n\"",	/* d */
+	"\"%07.7_ax \" 8/2 \" %06o \" \"\\n\"",		/* o */
+	"\"%07.7_ax \" 8/2 \"   %04x \" \"\\n\"",	/* x */
+};
+
+static const char add_first[] = "\"%07.7_Ax\n\"";
+
+static const char hexdump_opts[] = "bcdoxCe:f:n:s:v";
+
+static const struct suffix_mult suffixes[] = {
+	{"b",  512 },
+	{"k",  1024 },
+	{"m",  1024*1024 },
+	{NULL, 0 }
+};
+
+int hexdump_main(int argc, char **argv)
+{
+	const char *p;
+	int ch;
+
+	bb_dump_vflag = FIRST;
+	bb_dump_length = -1;
+
+	while ((ch = getopt(argc, argv, hexdump_opts)) > 0) {
+		p = strchr(hexdump_opts, ch);
+		if (!p)
+			bb_show_usage();
+		if ((p - hexdump_opts) < 5) {
+			bb_dump_add(add_first);
+			bb_dump_add(add_strings[(int)(p - hexdump_opts)]);
+		} else if (ch == 'C') {
+			bb_dump_add("\"%08.8_Ax\n\"");
+			bb_dump_add("\"%08.8_ax  \" 8/1 \"%02x \" \"  \" 8/1 \"%02x \" ");
+			bb_dump_add("\"  |\" 16/1 \"%_p\" \"|\\n\"");
+		} else {
+			/* Save a little bit of space below by omitting the 'else's. */
+			if (ch == 'e') {
+				bb_dump_add(optarg);
+			} /* else */
+			if (ch == 'f') {
+				bb_dump_addfile(optarg);
+			} /* else */
+			if (ch == 'n') {
+				bb_dump_length = xatoi_u(optarg);
+			} /* else */
+			if (ch == 's') {
+				bb_dump_skip = xatoul_range_sfx(optarg, 0, LONG_MAX, suffixes);
+			} /* else */
+			if (ch == 'v') {
+				bb_dump_vflag = ALL;
+			}
+		}
+	}
+
+	if (!bb_dump_fshead) {
+		bb_dump_add(add_first);
+		bb_dump_add("\"%07.7_ax \" 8/2 \"%04x \" \"\\n\"");
+	}
+
+	argv += optind;
+
+	return bb_dump_dump(argv);
+}