* ForkUnixShell() can be a static procedure
* Restructure SAFEREAD() to be a little clearer
* Convert unixjob type field defines to an enum and fix related unhandled switch cases.
* Use local declaration of loop variables in for-loop, removing register attributes
* Restructure SAFEREAD() to be a little clearer
* Send and receive 2 additional bytes for pid.
* Prefer standard C99 "inline" over "__inline__" for SAFEREAD
As a prerequisite for cleaning up some other include issues, all the
include files in inc/ should have an include guard. All the xxxdefs.h
were created with them, but most older files were not.
Previously, we were using SysV pseudo-terminals on Solaris and BSD
pseudo-terminals on other Unix platforms. BSD pseudo-terminals have
been deprecated on Linux and are no longer available in some kernel
configurations.
The POSIX API is basically the same as the SysV API, apart from using
`posix_openpt` instead of `open` with `/dev/ptmx`.
Closesinterlisp/medley#121.
Update files that depend on unixfork functions to include unixfork.h
Declare as static all functions in unixfork.c that are not needed externally.
Add dependencies to makefile-tail.
modified: makefile-tail
new file: ../inc/unixfork.h
modified: ../src/ldeboot.c
modified: ../src/main.c
modified: ../src/unixfork.c
