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UNICODE-SHOW(1) helper-scripts Manual UNICODE-SHOW(1) NAME unicode-show - Scan and annotate suspicious Unicode characters NAME unicode-show - detect and annotate non-ASCII or suspicious Unicode charac- ters in text or files SYNOPSIS unicode-show [FILE]... DESCRIPTION unicode-show is a utility that reads text input (from standard input or files) and highlights suspicious Unicode characters, such as those outside the safe ASCII range. This tool is useful for identifying potentially mali- cious or misleading Unicode characters in source code, logs, or user input. For each suspicious character, <strong>unicode-show</strong> prints: * The line it appears on, annotated with [U+XXXX] markers * A description including the character (if visible), Unicode codepoint, character name, and category What is considered suspicious: * Characters outside the printable ASCII range (0x20-0x7E) * Control characters (excluding \n and \t) * Carriage returns (\r), even when used in CRLF pairs * Any character not in the standard set of ASCII letters, digits, punctu- ation, and trailing whitespace Output formatting: * Annotations are colorized using ANSI escape codes if stdout is a termi- nal and the environment is color-friendly * Red for inline [U+XXXX] markers * Cyan for character metadata descriptions Color output is disabled if: * The environment variable $NOCOLOR is set * The environment variable $NO_COLOR is set to 1 * $TERM is set to dumb * Output is redirected (non-interactive terminal) OPTIONS This tool takes no options. Any arguments are treated as file paths. If no arguments are given, input is read from standard input. EXIT STATUS * 0 - No suspicious Unicode characters found * 1 - Suspicious characters were detected * 2 - An error occurred (e.g., file I/O or decoding failure) EXAMPLES Scan a file for suspicious characters: unicode-show suspicious.txt Scan multiple files: unicode-show file1.txt file2.md Scan input from a pipeline: cat file1.txt | unicode-show Disable color output: NOCOLOR=1 unicode-show example.txt ENVIRONMENT * NOCOLOR - disables color output if set * NO_COLOR - disables color output if set to 1 * TERM - if set to dumb, disables color output AUTHOR This man page has been written by Patrick Schleizer (adrelanos@whonix.org). helper-scripts January 2020 UNICODE-SHOW(1)
NAME | NAME | SYNOPSIS | DESCRIPTION | For each suspicious character, <strong>unicode-show</strong> prints: | Color output is disabled if: | OPTIONS | EXIT STATUS | EXAMPLES | ENVIRONMENT | AUTHOR
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