1 /* vi: set sw=4 ts=4: */
3 * hexdump implementation for busybox
4 * Based on code from util-linux v 2.11l
7 * The Regents of the University of California. All rights reserved.
9 * Licensed under GPLv2 or later, see file License in this tarball for details.
15 /* This is a NOEXEC applet. Be very careful! */
17 static void bb_dump_addfile(dumper_t *dumper, char *name)
23 fp = xfopen_for_read(name);
24 while ((buf = xmalloc_fgetline(fp)) != NULL) {
25 p = skip_whitespace(buf);
26 if (*p && (*p != '#')) {
27 bb_dump_add(dumper, p);
34 static const char *const add_strings[] = {
35 "\"%07.7_ax \" 16/1 \"%03o \" \"\\n\"", /* b */
36 "\"%07.7_ax \" 16/1 \"%3_c \" \"\\n\"", /* c */
37 "\"%07.7_ax \" 8/2 \" %05u \" \"\\n\"", /* d */
38 "\"%07.7_ax \" 8/2 \" %06o \" \"\\n\"", /* o */
39 "\"%07.7_ax \" 8/2 \" %04x \" \"\\n\"", /* x */
42 static const char add_first[] ALIGN1 = "\"%07.7_Ax\n\"";
44 static const char hexdump_opts[] ALIGN1 = "bcdoxCe:f:n:s:v" IF_FEATURE_HEXDUMP_REVERSE("R");
46 static const struct suffix_mult suffixes[] = {
53 int hexdump_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
54 int hexdump_main(int argc, char **argv)
56 dumper_t *dumper = alloc_dumper();
59 #if ENABLE_FEATURE_HEXDUMP_REVERSE
64 if (ENABLE_HD && !applet_name[2]) { /* we are "hd" */
69 /* We cannot use getopt32: in hexdump options are cumulative.
70 * E.g. "hexdump -C -C file" should dump each line twice */
71 while ((ch = getopt(argc, argv, hexdump_opts)) > 0) {
72 p = strchr(hexdump_opts, ch);
75 if ((p - hexdump_opts) < 5) {
76 bb_dump_add(dumper, add_first);
77 bb_dump_add(dumper, add_strings[(int)(p - hexdump_opts)]);
79 /* Save a little bit of space below by omitting the 'else's. */
82 bb_dump_add(dumper, "\"%08.8_Ax\n\"");
83 bb_dump_add(dumper, "\"%08.8_ax \" 8/1 \"%02x \" \" \" 8/1 \"%02x \" ");
84 bb_dump_add(dumper, "\" |\" 16/1 \"%_p\" \"|\\n\"");
87 bb_dump_add(dumper, optarg);
90 bb_dump_addfile(dumper, optarg);
93 dumper->dump_length = xatoi_u(optarg);
96 dumper->dump_skip = xatoul_range_sfx(optarg, 0, LONG_MAX, suffixes);
99 dumper->dump_vflag = ALL;
101 #if ENABLE_FEATURE_HEXDUMP_REVERSE
108 if (!dumper->fshead) {
109 bb_dump_add(dumper, add_first);
110 bb_dump_add(dumper, "\"%07.7_ax \" 8/2 \"%04x \" \"\\n\"");
115 #if !ENABLE_FEATURE_HEXDUMP_REVERSE
116 return bb_dump_dump(dumper, argv);
119 return bb_dump_dump(dumper, argv);
122 /* -R: reverse of 'hexdump -Cv' */
131 fp = xfopen_for_read(*argv);
133 while ((buf = xmalloc_fgetline(fp)) != NULL) {
136 /* skip address or previous byte */
137 while (isxdigit(*p)) p++;
138 while (*p == ' ') p++;
139 /* '|' char will break the line */
140 if (!isxdigit(*p) || sscanf(p, "%x ", &ch) != 1)
149 fflush_stdout_and_exit(EXIT_SUCCESS);