isutf8 - Man Page

• Check whether the specified files contain valid UTF-8: isutf8 path/to/file1 path/to/file2 ...
• Print errors using multiple lines: isutf8 --verbose path/to/file1 path/to/file2 ...
• Do not print anything to stdout, indicate the result merely with the exit code: isutf8 --quiet path/to/file1 path/to/file2 ...
• Only print the names of the files containing invalid UTF-8: isutf8 --list path/to/file1 path/to/file2 ...
• Same as --list but inverted, i.e., only print the names of the files containing valid UTF-8: isutf8 --invert path/to/file1 path/to/file2 ...

tldr.sh

isutf8 [-hqliv] [--help] [--quiet] [--list] [--invert] [--verbose] [[file]]

isutf8 checks whether files are syntactically valid UTF-8. Input is either files named on the command line, or the standard input. Notices about files with invalid UTF-8 are printed to standard output.

-h,  --help

Print out a help summary.

-q,  --quiet

Don't print messages telling which files are invalid UTF-8, merely indicate it with the exit status.

-l,  --list

Print only the names of files containing invalid UTF-8.

-i,  --invert

Invert the selection: list UTF-8 compatible files.

-v,  --verbose

Also print an hexdump-like view of the error and some context.

If the file is valid UTF-8, the exit status is zero. If the file is not valid UTF-8, or there is some error, the exit status is non-zero.

Lars Wirzenius, Julien Palard

utf8(7)