> In the BSDs it is a standards compliant posix sh too. In FreeBSD, it is tcsh in sh mode. Bash does the same too when invoked as sh[0]. It's POSIX compliant w

> In the BSDs it is a standards compliant posix sh too. In FreeBSD, it is tcsh in sh mode. Bash does the same too when invoked as sh[0]. It's POSIX compliant with extensions. There's still all the shell's code there, it's just that some of it is switched off by default, or its behaviour modified, to be compliant. [0] http://www.gnu.org/software/bash/manual/html_node/Bash-POSIX-Mode.html http://www.gnu.org/software/bash/manual/html_node/Bash-POSIX...