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| author | Rory Dudley | 2024-02-27 03:49:01 -0700 |
|---|---|---|
| committer | Rory Dudley | 2024-02-27 03:49:01 -0700 |
| commit | e94d09da9449cabd7ece2acd98d52b1946a922a4 (patch) | |
| tree | f0fb980662c01bf0c37bc2cfe30dcc5f7952f869 /LICENSE.txt | |
| parent | 0548e74cb3227716cf445f27bd64b8c0b4d0f981 (diff) | |
| download | dwarvish-e94d09da9449cabd7ece2acd98d52b1946a922a4.tar.gz | |
Remove custom errors and fix background forking
Removes the custom errors in src/recite/erro.rs, and replaces them with
std::io::Errors throughout (recite(), incant_, macros).
Fixed a bug with the way forking to the background is handled, where
registering the signal handler in main for all processes would break
couplets (i.e. pipes). Instead, this sets up a new signal handler each
time a process is forked into the background. It uses a Vec<i32> to keep
track of all the background processes.
Notes
Notes:
First off, there is some defunct code in the main repl loop, which is an
example of killing zombie processes after each prompt. This should be
removed, but I kept it in, just in case I go back to it for some reason.
To be honest, I have no clue why this code works. In theory, I should
have to remove the pid from the pids: Vec<i32> if waitpid returns a
positive integer. However, when I tried this, it completely broke the
program. ¯\_(ツ)_/¯
Also, it's worth noting that registering a signal handler with
signal_hook::low_level::register, is somewhat costly, according to their
docs. Given that this only occurs for background processes that are
forked, however, I think it is acceptable.
Finally, we never unregister the signal handler, so I'm not sure if
that's still hanging out in memory somewhere or no.
Diffstat (limited to 'LICENSE.txt')
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