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hexdump: add hd alias, add -R option

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This commit is contained in:
Denis Vlasenko 2007-11-18 05:36:50 +00:00
parent 16aec39ebe
commit fbe5f39f0f
4 changed files with 108 additions and 32 deletions
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1
include/applets.h
View File

@ -171,6 +171,7 @@ USE_GREP(APPLET(grep, _BB_DIR_BIN, _BB_SUID_NEVER))
USE_GUNZIP(APPLET(gunzip, _BB_DIR_BIN, _BB_SUID_NEVER))
USE_GZIP(APPLET(gzip, _BB_DIR_BIN, _BB_SUID_NEVER))
USE_HALT(APPLET(halt, _BB_DIR_SBIN, _BB_SUID_NEVER))
USE_HD(APPLET_ODDNAME(hd, hexdump, _BB_DIR_USR_BIN, _BB_SUID_NEVER, hd))
USE_HDPARM(APPLET(hdparm, _BB_DIR_SBIN, _BB_SUID_NEVER))
USE_HEAD(APPLET(head, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
USE_HEXDUMP(APPLET_NOEXEC(hexdump, hexdump, _BB_DIR_USR_BIN, _BB_SUID_NEVER, hexdump))

33
include/usage.h
View File

@ -1384,21 +1384,28 @@
"daemon:x:1:1:daemon:/usr/sbin:/bin/sh\n"
#define hexdump_trivial_usage \
"[-[bcCdefnosvx]] [OPTION] FILE"
"[-bcCdefnosvx" USE_FEATURE_HEXDUMP_REVERSE("R") "] FILE..."
#define hexdump_full_usage \
"Display file(s) or standard input in a user specified format" \
"\n\nOptions:\n" \
" -b One-byte octal display\n" \
" -c One-byte character display\n" \
" -C Canonical hex+ASCII, 16 bytes per line\n" \
" -d Two-byte decimal display\n" \
" -e FORMAT STRING\n" \
" -f FORMAT FILE\n" \
" -n LENGTH Interpret only LENGTH bytes of input\n" \
" -o Two-byte octal display\n" \
" -s OFFSET Skip OFFSET bytes\n" \
" -v Display all input data\n" \
" -x Two-byte hexadecimal display"
"\n\nOptions:" \
"\n -b One-byte octal display" \
"\n -c One-byte character display" \
"\n -C Canonical hex+ASCII, 16 bytes per line" \
"\n -d Two-byte decimal display" \
"\n -e FORMAT STRING" \
"\n -f FORMAT FILE" \
"\n -n LENGTH Interpret only LENGTH bytes of input" \
"\n -o Two-byte octal display" \
"\n -s OFFSET Skip OFFSET bytes" \
"\n -v Display all input data" \
"\n -x Two-byte hexadecimal display" \
USE_FEATURE_HEXDUMP_REVERSE( \
"\n -R Reverse of 'hexdump -Cv'") \
#define hd_trivial_usage \
"FILE..."
#define hd_full_usage \
"hd is an alias for hexdump -C"
#define hostid_trivial_usage \
""

16
util-linux/Config.in
View File

@ -210,6 +210,22 @@ config HEXDUMP
The hexdump utility is used to display binary data in a readable
way that is comparable to the output from most hex editors.
config HD
bool "hd"
default n
help
hd is an alias to hexdump -C.
config FEATURE_HEXDUMP_REVERSE
bool "Support -R, reverse of 'hexdump -Cv'"
default n
depends on HEXDUMP
help
The hexdump utility is used to display binary data in an ascii
readable way. This option creates binary data from an ascii input.
NB: this option is non-standard. It's unwise to use it in scripts
aimed to be portable.
config HWCLOCK
bool "hwclock"
default n

60
util-linux/hexdump.c
View File

@ -45,7 +45,7 @@ static const char *const add_strings[] = {
static const char add_first[] ALIGN1 = "\"%07.7_Ax\n\"";
static const char hexdump_opts[] ALIGN1 = "bcdoxCe:f:n:s:v";
static const char hexdump_opts[] ALIGN1 = "bcdoxCe:f:n:s:v" USE_FEATURE_HEXDUMP_REVERSE("R");
static const struct suffix_mult suffixes[] = {
{ "b", 512 },
@ -59,10 +59,21 @@ int hexdump_main(int argc, char **argv)
{
const char *p;
int ch;
#if ENABLE_FEATURE_HEXDUMP_REVERSE
FILE *fp;
smallint rdump = 0;
#endif
bb_dump_vflag = FIRST;
bb_dump_length = -1;
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)
@ -70,12 +81,14 @@ int hexdump_main(int argc, char **argv)
if ((p - hexdump_opts) < 5) {
bb_dump_add(add_first);
bb_dump_add(add_strings[(int)(p - hexdump_opts)]);
} else if (ch == 'C') {
}
/* Save a little bit of space below by omitting the 'else's. */
if (ch == 'C') {
hd_applet:
bb_dump_add("\"%08.8_Ax\n\"");
bb_dump_add("\"%08.8_ax \" 8/1 \"%02x \" \" \" 8/1 \"%02x \" ");
bb_dump_add("\" |\" 16/1 \"%_p\" \"|\\n\"");
} else {
/* Save a little bit of space below by omitting the 'else's. */
}
if (ch == 'e') {
bb_dump_add(optarg);
} /* else */
@ -91,7 +104,11 @@ int hexdump_main(int argc, char **argv)
if (ch == 'v') {
bb_dump_vflag = ALL;
}
#if ENABLE_FEATURE_HEXDUMP_REVERSE
if (ch == 'R') {
rdump = 1;
}
#endif
}
if (!bb_dump_fshead) {
@ -101,5 +118,40 @@ int hexdump_main(int argc, char **argv)
argv += optind;
#if !ENABLE_FEATURE_HEXDUMP_REVERSE
return bb_dump_dump(argv);
#else
if (!rdump) {
return bb_dump_dump(argv);
}
/* -R: reverse of 'hexdump -Cv' */
fp = stdin;
if (!*argv) {
argv--;
goto jump_in;
}
do {
char *buf;
fp = xfopen(*argv, "r");
jump_in:
while ((buf = xmalloc_getline(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
}