Add some constness to avoid some warnings.
Remove use register keyword.
Deal with missing/unneeded extern/prototypes.
Some minor type changes/casts to avoid warnings.
Reviewed by: md5
- if a command was specified and script(1) failed to execute it,
it would print the name of your shell in the error message
instead of that of the command that failed.
- since finish() was installed as a SIGCHLD handler, it would
often run before the main loop had had time to process the
last few bytes of output. This resulted in very strange
truncated error messages.
- script(1) would almost always return with an exit status of 0,
even if the command returned a non-zero exit status. This broke
my 'build world, install it and rebuild the kernel' scripts
because 'make installworld' would run even if 'make buildworld'
had failed.
for gcc >= 2.5 and no-ops for gcc >= 2.6. Converted to use __dead2
or __pure2 where it wasn't already done, except in math.h where use
of __pure was mostly wrong.
