I don't know if this batch file interests anyone else, but I've found it pretty useful. Here is the internal help. Note: it uses sed and "od" (octal dump), so it's not a "pure" Take Command batch file. Here is the embedded help:
Oh, I almost forgot. Sample input and output:
If there is any interest in this, I'll post the source.
Eric P.
Code:
NONASC.BTM v1.43 -
Look for non-printable chars in file or input. Valid chars include 20h-7E,
TAB, CR, and LF. Control codes or graphic chars are considered "non-ASCII".
The input file is not changed. Exit code 0 if pure ASCII, or 1 otherwise.
Usage: nonasc [-switches] [filename]
Only 1 filename allowed. If filename is omitted, read from stdin. If no
switches are used, look for non-printing characters and display the first
2 lines of non-printing chars, if any. Hits are shown in reverse video.
Switches (may appear in any order):
-d Dump the input file in both hex and ASCII to the screen without
checking for invalid characters. Works on pure binary files.
Long files should be piped through a file pager (e.g., "less").
If the -{n} switch is used, limit the output to {n} lines.
-{n} Display {n} lines of input, where {n} is an integer (default: 2)
If -d is omitted, display {n} lines of invalid input.
If -d is used, display {n} lines beginning at top of file.
Numeric switch must be separate from other options! Thus,
"-d -5" and "-7 -t" are valid, but "-d5" or "-7t" are not.
-t Include TAB (0x09) as invalid char. -t and -d are incompatible.
If both are present, -t will be ignored.
-r Include CR (0x0D) as invalid char.
-z Allow Ctrl-Z (0x0A), but only at EOF.
-?, --help Display this help message
Code:
[0]> nonasc nonasc.btm
"nonasc.btm" contains only printable ASCII chars.
[0]> nonasc \windows\system32\edit.com
"\windows\system32\edit.com" contains control codes or graphics characters!
od -An -tx1 -a "\windows\system32\edit.com": (octdump -no_offset -hexcodes -ascii)
4d 5a fe 00 89 00 00 00 cd 01 fa 04 ff ff 58 0f
M Z ~ nul ht nul nul nul M soh z eot del del X si
80 00 00 00 10 00 2c 0f 1e 00 00 00 01 00 00 00
nul nul nul nul dle nul , si rs nul nul nul soh nul nul nul
Eric P.