Comments on: Shell puzzle 2

By: Rudd-O

Rudd-O — Fri, 30 Nov 2007 18:53:54 +0000

Marius: he’s asking a riddle, not wondering why the script fails. Scott got the answer.

Marius Gedminas — Thu, 29 Nov 2007 16:05:37 +0000

Try this instead:

#!/bin/sh
set -e -x

It will work on all Unixes, and it will work when you run the script with ’sh script.sh’.

Thu, 29 Nov 2007 15:43:29 +0000

It runs here (Solaris) fine without error:

~ $ cat /tmp/p.sh
#!/bin/sh -e -x

true
~ $ /tmp/p.sh
~ $

Linux issue?

Scott Robinson — Thu, 29 Nov 2007 15:25:02 +0000

Because all text after the initial interpreter name is passed in the first argument.

$ /bin/sh “-e -x”

fraggle — Thu, 29 Nov 2007 15:14:25 +0000

I think that #! only allows you to specify one additional parameter?

Raphaël Quinet — Thu, 29 Nov 2007 14:27:11 +0000

Your script could work on some Unix variants such as BSDi, older FreeBSDs or Minix.