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);
+}