This commit allows the Shell to complete paths in redirections.
A closing quote is added if the path is an unclosed quote.
```
$ foo > "foob<tab>
$ foo > "foobar"
```
This commit adds the InBackground and ShortCircuitOnFailure attributes
to commands, which respectively cause the command to be run in the
background, and abort the command chain with exit status != 0.
This patchset adds some metadata to Parser::parse() which allows the
Shell to ask for the rest of a command, if it is not complete.
A command is considered complete if it has no trailing pipe, or
unterminated string.
Previously the shell parser would discard empty tokens. We now allow
them when they are enclosed in quotes (either '' or "")
This means that a command like _echo ""_ will actually pass an empty
string to /bin/echo in argv[1] now.
As suggested by Joshua, this commit adds the 2-clause BSD license as a
comment block to the top of every source file.
For the first pass, I've just added myself for simplicity. I encourage
everyone to add themselves as copyright holders of any file they've
added or modified in some significant way. If I've added myself in
error somewhere, feel free to replace it with the appropriate copyright
holder instead.
Going forward, all new source files should include a license header.
This was a workaround to be able to build on case-insensitive file
systems where it might get confused about <string.h> vs <String.h>.
Let's just not support building that way, so String.h can have an
objectively nicer name. :^)
This was unnecessarily confusing. When we build up a chain of commands
connected by pipes, we now store the file descriptors of each end of
these pipes as rewirings in a vector. The rewirings are then put into
effect by calls to dup2().
Also run it across the whole tree to get everything using the One True Style.
We don't yet run this in an automated fashion as it's a little slow, but
there is a snippet to do so in makeall.sh.
