Trick an application into thinking its stdout is a terminal, not a pipe
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 pipe on stdout, and I want it to think that it's an interactive terminal so that I get the same output when redirecting.
I was thinking that wrapping it in an expect script or using a proc_open() in PHP would do it, but it doesn't.
Any ideas out there?
Aha!
The script command does what we want...
script --return -c "[executable string]" /dev/null
Does the trick!
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 <command> <args>
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
The unbuffer script that comes with Expect should handle this ok. If not, the application may be looking at something other than what its output is connected to, eg. what the TERM environment variable is set to.
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