diff options
author | Bjørn Mork <bjorn@mork.no> | 2015-05-15 10:20:47 +0200 |
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committer | Bjørn Mork <bjorn@mork.no> | 2015-05-15 10:20:47 +0200 |
commit | 73b16af8feec390afbabd9356d6e5e83c0390838 (patch) | |
tree | 3730020ba2f9caeb9d7815a975af51830b51ce11 /util-linux/hexdump.c |
busybox: imported from http://www.busybox.net/downloads/busybox-1.13.3.tar.bz2busybox-1.13.3
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Diffstat (limited to 'util-linux/hexdump.c')
-rw-r--r-- | util-linux/hexdump.c | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/util-linux/hexdump.c b/util-linux/hexdump.c new file mode 100644 index 0000000..48edd70 --- /dev/null +++ b/util-linux/hexdump.c @@ -0,0 +1,151 @@ +/* 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 "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" USE_FEATURE_HEXDUMP_REVERSE("R"); + +static const struct suffix_mult suffixes[] = { + { "b", 512 }, + { "k", 1024 }, + { "m", 1024*1024 }, + { } +}; + +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_FEATURE_HEXDUMP_REVERSE + FILE *fp; + smallint rdump = 0; +#endif + + if (ENABLE_HD && !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\""); + bb_dump_add(dumper, "\"%08.8_ax \" 8/1 \"%02x \" \" \" 8/1 \"%02x \" "); + 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_u(optarg); + } /* else */ + if (ch == 's') { + dumper->dump_skip = xatoul_range_sfx(optarg, 0, LONG_MAX, suffixes); + } /* else */ + if (ch == 'v') { + dumper->dump_vflag = ALL; + } +#if ENABLE_FEATURE_HEXDUMP_REVERSE + if (ch == 'R') { + rdump = 1; + } +#endif + } + + if (!dumper->fshead) { + bb_dump_add(dumper, add_first); + bb_dump_add(dumper, "\"%07.7_ax \" 8/2 \"%04x \" \"\\n\""); + } + + argv += optind; + +#if !ENABLE_FEATURE_HEXDUMP_REVERSE + return bb_dump_dump(dumper, argv); +#else + if (!rdump) { + return bb_dump_dump(dumper, argv); + } + + /* -R: reverse of 'hexdump -Cv' */ + fp = stdin; + if (!*argv) { + argv--; + goto jump_in; + } + + do { + char *buf; + fp = xfopen_for_read(*argv); + jump_in: + while ((buf = xmalloc_fgetline(fp)) != NULL) { + p = buf; + while (1) { + /* skip address or previous byte */ + while (isxdigit(*p)) p++; + while (*p == ' ') p++; + /* '|' char will break the line */ + if (!isxdigit(*p) || sscanf(p, "%x ", &ch) != 1) + break; + putchar(ch); + } + free(buf); + } + fclose(fp); + } while (*++argv); + + fflush_stdout_and_exit(EXIT_SUCCESS); +#endif +} |