This is a school project, which is why some formatting decisions may be questionnable (namely, we can't have more than 5 functions per file or 25 lines per function).
An advanced unix shell coded entirely from scratch with the following features:
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Line editing:
- Made from scratch, we implemented our own readline using the termcap library
- Readline shortcuts CTRL-U, CTRL-Y, CTRL-K, CTRL-W
- Line history
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Simple commands execution:
- ; and & control operators
- All POSIX basic input/output redirections: >, <, >>, <<, |
- Logical operators && and ||
- Useful builtins (cd, echo, exit, hash, type)
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Environment management and parameter expansion:
- Special parameters
- Internal variables
- Full quote support: ", ', \
- Field splitting
- Associated builtins (env, set, unset, export)
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Advanced expansion features:
- Pattern matching (* [a!bc-e])
- Arithmetic expansion with $((...))
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Contextual autocompletion:
- Command autocompletion (binaries and builtins)
- Command options autocompletion
- Variables, files and directories autocompletion
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More advanced command syntax and features:
- Subshells, command grouping with (...) and {...}
- Command substitution with $(...)
- Process substitution with <(...) and >(...)
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Full job control support:
- Signal handling
- Full tracking of all processes launched by the shell (IDs, statuses, exit codes)
- Basic builtins to interact with the processes (jobs, fg, bg)
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And more:
- Non interactive mode, allowing you to write scripts in a file and give it as an argument to the program
- More than 400 automatic tests, using script and scriptlive to test interactive mode features like autocompletion and job control
- Thoroughly bug-tested using AFL
