util-linux/hexdump.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * hexdump implementation for busybox
   4  * Based on code from util-linux v 2.11l
   5  *
   6  * Copyright (c) 1989
   7  *      The Regents of the University of California.  All rights reserved.
   8  *
   9  * Licensed under GPLv2 or later, see file License in this tarball for details.
  10  */
  11
  12 #include "busybox.h"
  13 #include <getopt.h>
  14 #include "dump.h"
  15
  16 static void bb_dump_addfile(char *name)
  17 {
  18         char *p;
  19         FILE *fp;
  20         char *buf;
  21
  22         fp = xfopen(name, "r");
  23
  24         while ((buf = bb_get_chomped_line_from_file(fp)) != NULL) {
  25                 p = skip_whitespace(buf);
  26
  27                 if (*p && (*p != '#')) {
  28                         bb_dump_add(p);
  29                 }
  30                 free(buf);
  31         }
  32         fclose(fp);
  33 }
  34
  35 static const char * const add_strings[] = {
  36                         "\"%07.7_ax \" 16/1 \"%03o \" \"\\n\"",         /* b */
  37                         "\"%07.7_ax \" 16/1 \"%3_c \" \"\\n\"",         /* c */
  38                         "\"%07.7_ax \" 8/2 \"  %05u \" \"\\n\"",        /* d */
  39                         "\"%07.7_ax \" 8/2 \" %06o \" \"\\n\"",         /* o */
  40                         "\"%07.7_ax \" 8/2 \"   %04x \" \"\\n\"",       /* x */
  41 };
  42
  43 static const char add_first[] = "\"%07.7_Ax\n\"";
  44
  45 static const char hexdump_opts[] = "bcdoxCe:f:n:s:v";
  46
  47 static const struct suffix_mult suffixes[] = {
  48         {"b",  512 },
  49         {"k",  1024 },
  50         {"m",  1024*1024 },
  51         {NULL, 0 }
  52 };
  53
  54 int hexdump_main(int argc, char **argv)
  55 {
  56 //      register FS *tfs;
  57         const char *p;
  58         int ch;
  59
  60         bb_dump_vflag = FIRST;
  61         bb_dump_length = -1;
  62
  63         while ((ch = getopt(argc, argv, hexdump_opts)) > 0) {
  64                 if ((p = strchr(hexdump_opts, ch)) != NULL) {
  65                         if ((p - hexdump_opts) < 5) {
  66                                 bb_dump_add(add_first);
  67                                 bb_dump_add(add_strings[(int)(p - hexdump_opts)]);
  68                         } else if (ch == 'C') {
  69                                 bb_dump_add("\"%08.8_Ax\n\"");
  70                                 bb_dump_add("\"%08.8_ax  \" 8/1 \"%02x \" \"  \" 8/1 \"%02x \" ");
  71                                 bb_dump_add("\"  |\" 16/1 \"%_p\" \"|\\n\"");
  72                         } else {
  73                                 /* Sae a little bit of space below by omitting the 'else's. */
  74                                 if (ch == 'e') {
  75                                         bb_dump_add(optarg);
  76                                 } /* else */
  77                                 if (ch == 'f') {
  78                                         bb_dump_addfile(optarg);
  79                                 } /* else */
  80                                 if (ch == 'n') {
  81                                         bb_dump_length = bb_xgetularg10_bnd(optarg, 0, INT_MAX);
  82                                 } /* else */
  83                                 if (ch == 's') {
  84                                         bb_dump_skip = bb_xgetularg_bnd_sfx(optarg, 10, 0, LONG_MAX, suffixes);
  85                                 } /* else */
  86                                 if (ch == 'v') {
  87                                         bb_dump_vflag = ALL;
  88                                 }
  89                         }
  90                 } else {
  91                         bb_show_usage();
  92                 }
  93         }
  94
  95         if (!bb_dump_fshead) {
  96                 bb_dump_add(add_first);
  97                 bb_dump_add("\"%07.7_ax \" 8/2 \"%04x \" \"\\n\"");
  98         }
  99
 100         argv += optind;
 101
 102         return(bb_dump_dump(argv));
 103 }