Automatically remap any configured stderr, stdout, stdin streams about cloudabi-utils HOT 1 OPEN

Keep in mind that this can already be achieved in the form of a library, wrapper, etc. The traditional POSIX runtime environment could be modeled by having a YAML schema like this:

args:
- ls
- -l
envs:
  HOME: /home/ed
  PATH: /bin:/sbin:/usr/bin:/usr/sbin
stdin: !fd ...
stdout: !fd ...
stderr: !fd ...
working_directory: !fd ...
network: !flower_switchboard_handle ...

And then you could write a wrapper library that:

• provides a copy of all of the functions that are missing in cloudlibc (e.g., a regular open(), socket(), bind(), connect()),
• declares stdin and stdout,
• calls functions like fswap() to set up stderr,
• calls into a traditional main() function.

The nice thing about putting it in a separate library is that it makes it easier for people to opt in/opt out of this kind of functionality. People who want to have a pure capability-based programming environment could use CloudABI as is. People who just want get an existing application to build without a lot of hassle can use the compat layer described above.

It's important to mention that even though I'd applaud the development of such a compat layer, I'd rather not have it part of the CloudABI project itself (e.g., part of the cloudlibc repository). If using such a layer would become the norm, we wouldn't gain anything in the end.

from cloudabi-utils.