akhahaha/time-travel-shell

UCLA CS 111 | Lab 1: Shell-script parallelisation

time-travel-shell's Issues

Implement Time-Travel

Implement time-travelling parallelization between top-level command trees, and between sequence commands if possible.

Multiline Subshells

Skeleton code only supports subshells as trees, which require them to be single-line complete commands.

Do we need to change the skeleton code or can we leave it as is?

Command Execution

Implement command execution so that the output runs like the input script.

I have some notes from the TA available at https://gist.github.com/akhahaha/8644128.

Implement get_depends()

Implement get_depends() to get files required by a command tree. Function currently located in read-command.c.

Newline Special Cases

White space consisting of space, tab, and newline. Newline is special: as described above, it can substitute for semicolon. Also, although white space can ordinarily appear before and after any token, the only tokens that newlines can appear before are (, ), and the first words of simple commands. Newlines may follow any special token other than < and >.

Memory Leakage

Ensure there are no memory leaks.

# Special Cases

Comments, each consisting of a # that is not immediately preceded by an ordinary token, followed by characters up to (but not including) the next newline.

So do words with '#' in or immediately following them become syntax errors or stay words?

Error Handling

If your shell's input does not fall within the above subset, your implementation should output to stderr a syntax error message that starts with the line number and a colon, and should then exit.