Sandbox wc(1) with fileargs.

[allanjude]

This looks pretty clean, I like it.

usr.bin/wc/wc.c

144

Doesn't this need to be before the first use of err.h? It should be before the above if() because of the xo_warn()

[oshogbo]

usr.bin/wc/wc.c

144

But this is needed only when we are in capability mode which we enter below, so if xo_warn will be called it will still have access to the NLS.

[oshogbo]

We handle now empty argc and argv.

[emaste]

Looks good

usr.bin/wc/wc.c

49

should sort alphabetically before stat