zsh doesn't show signal/error name for a failed C executable when run from a script-CodePudding

I just found that my zsh don't alert me when there's a runtime error. Can anyone help me?

int main(void) {
    int a = 1;
    int b = 0;
    int c = a/b;
    return 0;
}

I compiled it and wrote a script to run it,

./a.out

I then entered zsh a.sh. It finished without any error.

But when I run it with the command line ./a.out it showed: zsh: floating point exception ./a.out

I'm using MacOS Monterey 12.2.1 and my zsh is zsh 5.8 (x86_64-apple-darwin21.0).

Really thanks!

I now understand that interactive and non-interactive shells have many different behaviors but I still don't know if there's a way zsh can tell me the error. (especially when the script is in .zshrc) The error message is kind of important.

CodePudding user response：

The error message you see is specific to the interactive shell, which detects that your program exit with a floating-point exception and reports it. It's not clear how to make a non-interactive shell report the error similarly, but it would be better to do such error-checking yourself. For example,

./a.out
case $? in
  0) print "Success" ;;
  *) print "Error: $?" ;;
esac