How to trick an application into thinking its stdout is a terminal, not a pipe

Question

I\'m trying to do the opposite of \"Detect if stdin is a terminal or pipe?\".

I\'m running an application that\'s changing its output format because it detects a pip

Answer 1

Based on Chris' solution, I came up with the following little helper function:

faketty() {
    script -qfc "$(printf "%q " "$@")" /dev/null
}

The quirky looking printf is necessary to correctly expand the script's arguments in $@ while protecting possibly quoted parts of the command (see example below).

Usage:

faketty  

Example:

$ python -c "import sys; print sys.stdout.isatty()"
True
$ python -c "import sys; print sys.stdout.isatty()" | cat
False
$ faketty python -c "import sys; print sys.stdout.isatty()" | cat
True