| /* 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 source tree. |
| */ |
| //config:config HEXDUMP |
| //config: bool "hexdump (8.6 kb)" |
| //config: default y |
| //config: help |
| //config: The hexdump utility is used to display binary data in a readable |
| //config: way that is comparable to the output from most hex editors. |
| //config: |
| //config:config HD |
| //config: bool "hd (7.8 kb)" |
| //config: default y |
| //config: help |
| //config: hd is an alias to hexdump -C. |
| |
| //applet:IF_HEXDUMP(APPLET_NOEXEC(hexdump, hexdump, BB_DIR_USR_BIN, BB_SUID_DROP, hexdump)) |
| //applet:IF_HD(APPLET_NOEXEC(hd, hexdump, BB_DIR_USR_BIN, BB_SUID_DROP, hd)) |
| |
| //kbuild:lib-$(CONFIG_HEXDUMP) += hexdump.o |
| //kbuild:lib-$(CONFIG_HD) += hexdump.o |
| |
| //usage:#define hexdump_trivial_usage |
| //usage: "[-bcdoxCv] [-e FMT] [-f FMT_FILE] [-n LEN] [-s OFS] [FILE]..." |
| //usage:#define hexdump_full_usage "\n\n" |
| //usage: "Display FILEs (or stdin) in a user specified format\n" |
| //usage: "\n -b 1-byte octal display" |
| //usage: "\n -c 1-byte character display" |
| //usage: "\n -d 2-byte decimal display" |
| //usage: "\n -o 2-byte octal display" |
| //usage: "\n -x 2-byte hex display" |
| //usage: "\n -C hex+ASCII 16 bytes per line" |
| //usage: "\n -v Show all (no dup folding)" |
| //usage: "\n -e FORMAT_STR Example: '16/1 \"%02x|\"\"\\n\"'" |
| //usage: "\n -f FORMAT_FILE" |
| // exactly the same help text lines in hexdump and xxd: |
| //usage: "\n -n LENGTH Show only first LENGTH bytes" |
| //usage: "\n -s OFFSET Skip OFFSET bytes" |
| //usage: |
| //usage:#define hd_trivial_usage |
| //usage: "FILE..." |
| //usage:#define hd_full_usage "\n\n" |
| //usage: "hd is an alias for hexdump -C" |
| |
| #include "libbb.h" |
| #include "dump.h" |
| |
| /* This is a NOEXEC applet. Be very careful! */ |
| |
| static void bb_dump_addfile(dumper_t *dumper, char *name) |
| { |
| char *p; |
| FILE *fp; |
| char *buf; |
| |
| fp = xfopen_for_read(name); |
| while ((buf = xmalloc_fgetline(fp)) != NULL) { |
| p = skip_whitespace(buf); |
| if (*p && (*p != '#')) { |
| bb_dump_add(dumper, 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[] ALIGN1 = "\"%07.7_Ax\n\""; |
| |
| static const char hexdump_opts[] ALIGN1 = "bcdoxCe:f:n:s:v"; |
| |
| int hexdump_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
| int hexdump_main(int argc, char **argv) |
| { |
| dumper_t *dumper = alloc_dumper(); |
| const char *p; |
| int ch; |
| |
| if (ENABLE_HD |
| && (!ENABLE_HEXDUMP || !applet_name[2]) |
| ) { /* we are "hd" */ |
| ch = 'C'; |
| goto hd_applet; |
| } |
| |
| /* We cannot use getopt32: in hexdump options are cumulative. |
| * E.g. "hexdump -C -C file" should dump each line twice */ |
| 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(dumper, add_first); |
| bb_dump_add(dumper, add_strings[(int)(p - hexdump_opts)]); |
| } |
| /* Save a little bit of space below by omitting the 'else's. */ |
| if (ch == 'C') { |
| hd_applet: |
| bb_dump_add(dumper, "\"%08.8_Ax\n\""); // final address line after dump |
| //------------------- "address " 8 * "xx " " " 8 * "xx " |
| bb_dump_add(dumper, "\"%08.8_ax \"8/1 \"%02x \"\" \"8/1 \"%02x \""); |
| //------------------- " |ASCII...........|\n" |
| bb_dump_add(dumper, "\" |\"16/1 \"%_p\"\"|\n\""); |
| } |
| if (ch == 'e') { |
| bb_dump_add(dumper, optarg); |
| } /* else */ |
| if (ch == 'f') { |
| bb_dump_addfile(dumper, optarg); |
| } /* else */ |
| if (ch == 'n') { |
| dumper->dump_length = xatoi_positive(optarg); |
| } /* else */ |
| if (ch == 's') { /* compat: -s accepts hex numbers too */ |
| dumper->dump_skip = xstrtoull_range_sfx( |
| optarg, |
| /*base:*/ 0, |
| /*lo:*/ 0, /*hi:*/ OFF_T_MAX, |
| bkm_suffixes |
| ); |
| } /* else */ |
| if (ch == 'v') { |
| dumper->dump_vflag = ALL; |
| } |
| } |
| |
| if (!dumper->fshead) { |
| bb_dump_add(dumper, add_first); |
| bb_dump_add(dumper, "\"%07.7_ax \"8/2 \"%04x \"\"\n\""); |
| } |
| |
| argv += optind; |
| |
| return bb_dump_dump(dumper, argv); |
| } |