Rationalize and generalize string quoting mechanism.No limits on string lengths when interpreting shell scripts.Control over signal handling within scripts.Control over all input/output file descriptors.To provide programmability including control flow and variables.To allow shell scripts to be used as filters.Some of the primary goals of the shell were: First appearing in Version 7 Unix, the Bourne shell superseded the Mashey shell. Work on the Bourne shell initially started in 1976. Version 7 Unix: the original Bourne shell manual page. It gained popularity with the publication of The Unix Programming Environment by Brian Kernighan and Rob Pike-the first commercially published book that presented the shell as a programming language in a tutorial form. Although it is used as an interactive command interpreter, it was also intended as a scripting language and contains most of the features that are commonly considered to produce structured programs. It was released in 1979 in the Version 7 Unix release distributed to colleges and universities. Unix-like systems continue to have /bin/sh-which will be the Bourne shell, or a symbolic link or hard link to a compatible shell-even when other shells are used by most users.ĭeveloped by Stephen Bourne at Bell Labs, it was a replacement for the Thompson shell, whose executable file had the same name- sh. The Bourne shell was the default shell for Version 7 Unix. The Bourne shell ( sh) is a shell command-line interpreter for computer operating systems. Bourne shell interaction on Version 7 Unix
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