158 lines
3.3 KiB
C
158 lines
3.3 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* hexdump implementation for busybox
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* Based on code from util-linux v 2.11l
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*
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* Copyright (c) 1989
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* The Regents of the University of California. All rights reserved.
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*
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* Licensed under GPLv2 or later, see file License in this tarball for details.
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*/
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#include <getopt.h>
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#include "libbb.h"
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#include "dump.h"
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/* This is a NOEXEC applet. Be very careful! */
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static void bb_dump_addfile(char *name)
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{
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char *p;
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FILE *fp;
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char *buf;
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fp = xfopen(name, "r");
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while ((buf = xmalloc_getline(fp)) != NULL) {
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p = skip_whitespace(buf);
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if (*p && (*p != '#')) {
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bb_dump_add(p);
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}
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free(buf);
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}
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fclose(fp);
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}
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static const char *const add_strings[] = {
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"\"%07.7_ax \" 16/1 \"%03o \" \"\\n\"", /* b */
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"\"%07.7_ax \" 16/1 \"%3_c \" \"\\n\"", /* c */
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"\"%07.7_ax \" 8/2 \" %05u \" \"\\n\"", /* d */
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"\"%07.7_ax \" 8/2 \" %06o \" \"\\n\"", /* o */
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"\"%07.7_ax \" 8/2 \" %04x \" \"\\n\"", /* x */
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};
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static const char add_first[] ALIGN1 = "\"%07.7_Ax\n\"";
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static const char hexdump_opts[] ALIGN1 = "bcdoxCe:f:n:s:v" USE_FEATURE_HEXDUMP_REVERSE("R");
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static const struct suffix_mult suffixes[] = {
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{ "b", 512 },
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{ "k", 1024 },
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{ "m", 1024*1024 },
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{ }
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};
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int hexdump_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int hexdump_main(int argc, char **argv)
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{
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const char *p;
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int ch;
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#if ENABLE_FEATURE_HEXDUMP_REVERSE
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FILE *fp;
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smallint rdump = 0;
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#endif
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bb_dump_vflag = FIRST;
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bb_dump_length = -1;
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if (ENABLE_HD && !applet_name[2]) { /* we are "hd" */
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ch = 'C';
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goto hd_applet;
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}
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/* We cannot use getopt32: in hexdump options are cumulative.
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* E.g. hexdump -C -C file should dump each line twice */
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while ((ch = getopt(argc, argv, hexdump_opts)) > 0) {
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p = strchr(hexdump_opts, ch);
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if (!p)
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bb_show_usage();
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if ((p - hexdump_opts) < 5) {
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bb_dump_add(add_first);
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bb_dump_add(add_strings[(int)(p - hexdump_opts)]);
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}
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/* Save a little bit of space below by omitting the 'else's. */
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if (ch == 'C') {
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hd_applet:
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bb_dump_add("\"%08.8_Ax\n\"");
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bb_dump_add("\"%08.8_ax \" 8/1 \"%02x \" \" \" 8/1 \"%02x \" ");
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bb_dump_add("\" |\" 16/1 \"%_p\" \"|\\n\"");
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}
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if (ch == 'e') {
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bb_dump_add(optarg);
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} /* else */
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if (ch == 'f') {
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bb_dump_addfile(optarg);
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} /* else */
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if (ch == 'n') {
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bb_dump_length = xatoi_u(optarg);
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} /* else */
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if (ch == 's') {
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bb_dump_skip = xatoul_range_sfx(optarg, 0, LONG_MAX, suffixes);
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} /* else */
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if (ch == 'v') {
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bb_dump_vflag = ALL;
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}
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#if ENABLE_FEATURE_HEXDUMP_REVERSE
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if (ch == 'R') {
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rdump = 1;
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}
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#endif
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}
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if (!bb_dump_fshead) {
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bb_dump_add(add_first);
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bb_dump_add("\"%07.7_ax \" 8/2 \"%04x \" \"\\n\"");
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}
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argv += optind;
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#if !ENABLE_FEATURE_HEXDUMP_REVERSE
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return bb_dump_dump(argv);
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#else
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if (!rdump) {
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return bb_dump_dump(argv);
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}
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/* -R: reverse of 'hexdump -Cv' */
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fp = stdin;
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if (!*argv) {
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argv--;
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goto jump_in;
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}
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do {
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char *buf;
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fp = xfopen(*argv, "r");
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jump_in:
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while ((buf = xmalloc_getline(fp)) != NULL) {
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p = buf;
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while (1) {
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/* skip address or previous byte */
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while (isxdigit(*p)) p++;
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while (*p == ' ') p++;
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/* '|' char will break the line */
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if (!isxdigit(*p) || sscanf(p, "%x ", &ch) != 1)
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break;
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putchar(ch);
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}
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free(buf);
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}
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fclose(fp);
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} while (*++argv);
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fflush_stdout_and_exit(EXIT_SUCCESS);
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#endif
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}
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