[miffe]

Seems like it only works in zsh, not bash or fish

[tombert]

  [tombert@puter:~/testscript]$ ./myscript.sh
    bash: ./myscript.sh: bash: bad interpreter: No such file or directory

You are right. Appears to only work with zsh. I will resume being annoyed then.

[adastra22]

Is this UNIX?

[adastra22]

The kernel interprets the shebang line, not the shell.

[jolmg]

It is possible for the shell to handle it. From zshall(1):

> If the program is a file beginning with ‘#!', the remainder of the first line specifies an interpreter for the program. The shell will execute the specified interpreter on operating systems that do not handle this executable format in the kernel.

Taking a quick look at the source in Src/exec.c:

  execve(pth, argv, newenvp);
  // [...]
  if ((eno = errno) == ENOEXEC || eno == ENOENT) {
              // [...]
              if (ct >= 2 && execvebuf[0] == '#' && execvebuf[1] == '!') {
                                // [...]
                                (pprog = pathprog(ptr2, NULL))) {

I guess at some point someone added that `|| eno == ENOENT` and the docs weren't updated.

[tombert]

I'm not sure the reason then, but they're definitely right; it works fine with zsh, doesn't work with bash. I wrote a test script to try it myself.

I don't have fish installed and can't be bothered to go that far, but I suspect they're right about that as well.