On most Unixes system() will run with the deafult CLI, the one that the root account uses, etc. It happens to be sh (or bsh on AIX) for hysterical raisons.

Uh, not in my recollection. It's hardwired to /bin/sh, and has nothing to do with what root has selected for a login shell.

Imagine the hysteria that would result the day root selected /bin/tcsh as their login shell!

Besides, the Bourne shell has a much more complete and clean syntax, especially for things like file-descriptor shuffling and control structures. The C-shell is hackish along those lines. There's a great paper on "CSH Programming Considered Harmful" out there that explains the problems. So it's a Good Thing that /bin/sh is used for system(3).

-- Randal L. Schwartz, Perl hacker

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