X-Git-Url: http://git.chise.org/gitweb/?a=blobdiff_plain;f=src%2Fsystty.h;h=6494003edbcd95111875d6e1b21d6bbe3d65b5e8;hb=63a686a3d18465a8c96b8cc4a273c295f8a5a379;hp=c15906e647c4b7d6e5ad0d3794933a0869fe7111;hpb=762383636a99307282c2d93d26c35c046ec24da1;p=chise%2Fxemacs-chise.git.1

diff --git a/src/systty.h b/src/systty.h
index c15906e..6494003 100644
--- a/src/systty.h
+++ b/src/systty.h
@@ -246,55 +246,34 @@ Boston, MA 02111-1307, USA.  */
 /*       Manipulate a terminal's current (foreground) process group     */
 /* -------------------------------------------------------------------- */
 
-/* EMACS_HAVE_TTY_PGRP is true if we can get and set the tty's current
-   controlling process group.
+/* EMACS_GET_TTY_PGRP(int FD, pid_t *PGID) sets *PGID to the terminal
+   FD's current foreground process group.  Return -1 if there is an error.
 
-   EMACS_GET_TTY_PGRP(int FD, int *PGID) sets *PGID the terminal FD's
-   current process group.  Return -1 if there is an error.
+   EMACS_SET_TTY_PGRP(int FD, pid_t *PGID) sets the terminal FD's current
+   foreground process group to *PGID.  Return -1 if there is an error.
 
-   EMACS_SET_TTY_PGRP(int FD, int *PGID) sets the terminal FD's
-   current process group to *PGID.  Return -1 if there is an error.  */
+   We prefer using the ioctl (BSD) interface instead of its Posix
+   replacement tgetpgrp/tcsetpgrp since that is documented as being
+   restricted to processes sharing the same controlling tty. */
 
-/* HPUX tty process group stuff doesn't work, says the anonymous voice
-   from the past.  */
-/* But HPUX people say it does, so I've removed it.  --ben */
-# ifdef TIOCGPGRP
-#  define EMACS_HAVE_TTY_PGRP
-# else
-#  ifdef HAVE_TERMIOS
-#   define EMACS_HAVE_TTY_PGRP
-#  endif
-# endif
-
-#ifdef EMACS_HAVE_TTY_PGRP
-
-#if defined (HAVE_TERMIOS) && ! defined (BSD_TERMIOS)
+#if defined (TIOCGPGRP)
 
-/* Resist the urge to insert needless extra parentheses. */
-#define EMACS_GET_TTY_PGRP(fd, pgid) (*(pgid) = tcgetpgrp (fd))
-#define EMACS_SET_TTY_PGRP(fd, pgid) tcsetpgrp (fd, *(pgid))
+#define EMACS_GET_TTY_PROCESS_GROUP(fd, pgid) ioctl (fd, TIOCGPGRP, pgid)
+#define EMACS_SET_TTY_PROCESS_GROUP(fd, pgid) ioctl (fd, TIOCSPGRP, pgid)
 
-#elif defined (TIOCSPGRP)
+#elif defined (HAVE_TCGETPGRP)
 
-#define EMACS_GET_TTY_PGRP(fd, pgid) (ioctl ((fd), TIOCGPGRP, (pgid)))
-#define EMACS_SET_TTY_PGRP(fd, pgid) (ioctl ((fd), TIOCSPGRP, (pgid)))
+#define EMACS_GET_TTY_PROCESS_GROUP(fd, pgid) (*(pgid) = tcgetpgrp (fd))
+#define EMACS_SET_TTY_PROCESS_GROUP(fd, pgid) tcsetpgrp (fd, *(pgid))
 
-#endif
-
-#endif /* EMACS_HAVE_TTY_PGRP */
-
-#ifndef EMACS_GET_TTY_PGRP
+#else
 
 /* Just ignore this for now and hope for the best */
-#define EMACS_GET_TTY_PGRP(fd, pgid) 0
-#define EMACS_SET_TTY_PGRP(fd, pgif) 0
+#define EMACS_GET_TTY_PROCESS_GROUP(fd, pgid) 0
+#define EMACS_SET_TTY_PROCESS_GROUP(fd, pgif) 0
 
 #endif
 
-/* XEmacs interim backward-compatibility */
-#define EMACS_GET_TTY_PROCESS_GROUP EMACS_GET_TTY_PGRP
-#define EMACS_SET_TTY_PROCESS_GROUP EMACS_SET_TTY_PGRP
-
 /* EMACS_GETPGRP (arg) returns the process group of the terminal.  */
 
 #ifdef GETPGRP_VOID