Decompose <sys/termios.h>.

The <sys/termios.h> header file is hardlinked to <termios.h>. It
contains both the structures and the flag definitions, but also the C
library interface that's implemented by the C library.

This header file has the typical problem of including too many random
things and being badly ordered. Instead of trying to fix this, decompose
it into two header files:

- <sys/_termios.h>, which contains struct termios and the flags.
- <termios.h>, which includes <sys/_termios.h> and contains the C
  library interface.

This means userspace has to include <termios.h> for struct termios,
while kernelspace code has to include <sys/tty.h>. Also add a
<sys/termios.h>, which prints a warning message before including
<termios.h>. I am aware that there are some applications that use this
header file as well.

1 files changed, 2 insertions, 2 deletions

diff --git a/include/Makefile b/include/Makefile
index 08ef6a5..2b0ea22 100644
--- a/include/Makefile
+++ b/include/Makefile
@@ -21,7 +21,7 @@ INCS=	a.out.h ar.h assert.h bitstring.h complex.h cpio.h _ctype.h ctype.h \
 	res_update.h resolv.h runetype.h search.h setjmp.h \
 	signal.h spawn.h stab.h \
 	stdbool.h stddef.h stdio.h stdlib.h string.h stringlist.h \
-	strings.h sysexits.h tar.h tgmath.h \
+	strings.h sysexits.h tar.h termios.h tgmath.h \
 	time.h timeconv.h timers.h ttyent.h \
 	ulimit.h unistd.h utime.h utmp.h uuid.h varargs.h vis.h wchar.h \
 	wctype.h wordexp.h
@@ -31,7 +31,7 @@ MHDRS=	float.h floatingpoint.h stdarg.h
 PHDRS=	sched.h semaphore.h _semaphore.h
 
 LHDRS=	aio.h errno.h fcntl.h linker_set.h poll.h stdint.h syslog.h \
-	termios.h ucontext.h
+	ucontext.h
 
 LDIRS=	bsm cam geom net net80211 netatalk netgraph netinet netinet6 \
 	netipsec ${_netipx} netnatm ${_netncp} netsmb \