X-Git-Url: https://code.delx.au/gnu-emacs/blobdiff_plain/c3ff76c42adaaa6a51a82d9573108b0a8d5dfa6d..660872b63b75b61d11b09471b5a254e1e5db3c1c:/src/systty.h

diff --git a/src/systty.h b/src/systty.h
index 4814c913b0..6aeb2f65a4 100644
--- a/src/systty.h
+++ b/src/systty.h
@@ -63,12 +63,12 @@ Boston, MA 02111-1307, USA.  */
 #if defined(_AIX) && defined(_I386)
 #include <termios.h>		/* termios.h needs to be before termio.h */
 #include <termio.h>
-#else /* not HAVE_TERMIOS */
+#else /* not (_AIX && _I386) */
 #ifndef NO_TERMIO
 #include <termio.h>
 #endif
 #include <termios.h>
-#endif /* _AIX && _I386 */
+#endif /* not (_AIX && _I386) */
 #define INCLUDED_FCNTL
 #include <fcntl.h>
 #else /* neither HAVE_TERMIO nor HAVE_TERMIOS */
@@ -292,13 +292,26 @@ static struct sensemode {
 
 #endif
 
-/* EMACS_GETPGRP (arg) returns the process group of the terminal.  */
+/* EMACS_GETPGRP (arg) returns the process group of the process.  */
 
+#ifdef __GNU_LIBRARY__
+/* GNU libc by default defines getpgrp with no args on all systems.  */
+#if __GLIBC__  >= 2
+/* glibc-2.1 adds the BSD compatibility getpgrp function
+   if you use _BSD_SOURCE, which Emacs does on GNU/Linux systems.  */
+#if __GLIBC_MINOR__ < 1 || ! defined (__FAVOR_BSD)
+#define GETPGRP_NO_ARG
+#endif
+#else /* __GLIBC__ < 2 */
+#define GETPGRP_NO_ARG
+#endif /* __GLIBC__ < 2 */
+#else /* not __GNU_LIBRARY__ */
 #if defined (USG) && !defined (GETPGRP_NEEDS_ARG)
 #  if !defined (GETPGRP_NO_ARG)
 #    define GETPGRP_NO_ARG
 #  endif
 #endif
+#endif /* not __GNU_LIBRARY__ */
 
 #if defined (GETPGRP_NO_ARG)
 #  define EMACS_GETPGRP(x) getpgrp()
@@ -379,6 +392,10 @@ struct emacs_tty {
    expression, so we moved them out to their own functions in sysdep.c.  */
 #define EMACS_GET_TTY(fd, p)        (emacs_get_tty ((fd), (p)))
 #define EMACS_SET_TTY(fd, p, waitp) (emacs_set_tty ((fd), (p), (waitp)))
+#ifdef P_  /* Unfortunately this file is sometimes included before lisp.h */
+extern int emacs_get_tty P_ ((int, struct emacs_tty *));
+extern int emacs_set_tty P_ ((int, struct emacs_tty *, int));
+#endif
 
 
 /* Define EMACS_TTY_TABS_OK.  */