On Fri, April 24, 2015 12:04 pm, John R Pierce wrote: > On 4/24/2015 9:47 AM, Gordon Messmer wrote: >> On 04/24/2015 03:57 AM, Pete Geenhuizen wrote: >>> if you leave it out the script will run in whatever environment it >>> currently is in. >> >> I'm reasonably certain that a script with no shebang will run with >> /bin/sh. I interpret your statement to mean that if a user is using >> ksh and enters the path to such a script, it would also run in ksh. >> That would only be true if you "sourced" the script from your shell. > > oh fun, just did some tests (using c6.latest). if you're in bash, > ./script (sans shebang) runs it in bash. if you're in dash or csh, > ./script runs it in sh. if you're in ksh, it runs it in ksh. > Wow! Surprise ;-) I just tested it on my FreeBSD workstation, and all works as expected (i.e. the script obeys shebang). Just in case, here is the contents of my test script: ######## #!/bin/sh readlink /proc/$$/file ######## ( note that that "file" is because I'm using FreeBSD /proc, for Linux you may need to replace the line with something like: readlink /proc/$$/exe Now the fun part in bash: $ echo $0 bash $ ./test /bin/sh in tcsh % echo $0 tcsh % ./test /bin/sh in zsh % echo $0 zsh % ./test /bin/sh But yet funnier thing: $ bash ./test /usr/local/bin/bash $ tcsh ./test /bin/tcsh $ zsh ./test /usr/local/bin/zsh Well, no creepy surprises for me ! ;-) (you can do the same on Linux of your choice and see if it behaves ;-) Thanks. Valeri ++++++++++++++++++++++++++++++++++++++++ Valeri Galtsev Sr System Administrator Department of Astronomy and Astrophysics Kavli Institute for Cosmological Physics University of Chicago Phone: 773-702-4247 ++++++++++++++++++++++++++++++++++++++++