I have a Bash script I was trying to make to help me run a rather complex command with small changes that it would ask me about through echo and read.I have found solutions to force it to run a terminal to execute the command, but I'm not interested in that. What I would like it to do is, if I space out and just hit Enter on it in Nautilus (making it run with Run Software), it'll just gently pop up a notification saying Please run this from a terminal.I can get the popup to happen -- as in I know the command -- but I can't get the Bash script to tell if it's being run inside a terminal or not, it seems to always think so. Is it even possible?
How can a Bash script tell how it was run?
bash;terminal;scripting;nautilus
From man bash under CONDITIONAL EXPRESSIONS:-t fd      True if file descriptor fd is open and refers to a terminal.Assuming fd 1 is standard out, if [ -t 1 ]; then should work for you.  The Advanced Shell Scripting Guide claims that -t used this way will fail over ssh, and that the test (using stdin, not stdout) should therefore be:if [[ -t 0 || -p /dev/stdin ]]-p tests if a file exists and is a named pipe.  However, I'd note experientially this is not true for me: -p /dev/stdin fails for both normal terminals and ssh sessions whereas if [ -t 0 ] (or -t 1) works in both cases (see also Gilles comments below about issues in that section of the Advanced Shell Scripting Guide).If the primary issue is a specialized context from which you wish to call the script to behave in a way appropriate to that context, you can sidestep all these technicalities and save your self some fuss by using a wrapper and a custom variable:!#/bin/bashexport SPECIAL_CONTEXT=1/path/to/real/script.shCall this live_script.sh or whatever and double click that instead.  You could of course accomplish the same thing with command line arguments, but a wrapper would still be needed to make point and click in a GUI file browser work.