Workaround for when TIOCSIGSEND fails.

diff --git a/src/ChangeLog b/src/ChangeLog
index d1510fe055d23c47f52a32304877730fa85d8509..b71df9b4c818a7b0f53fb2ab206172cb20ecbce7 100644 (file)
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,10 @@
+2003-02-23  Jan Dj\e,Ad\e(Brv  <jan.h.d@swipnet.se>
+
+       * process.c (emacs_get_tty_pgrp): New function.
+       (Fprocess_running_child_p, process_send_signal): Call
+        emacs_get_tty_pgrp instead of ioctl.
+       (process_send_signal): Call EMACS_KILLPG if ioctl TIOCSIGSEND fails.
+
 2003-02-19  Juanma Barranquero  <lektu@terra.es>
 
        * s/hpux10.h (HPUX10): Define it just once.

diff --git a/src/process.c b/src/process.c
index a89c05aa7905405f604e345e9c9a2c8d4b51b8eb..a59737dc1392984b13e61a0f089a7330e0a78af1 100644 (file)
--- a/src/process.c
+++ b/src/process.c
@@ -3572,6 +3572,33 @@ Output from processes can arrive in between bunches.")
   return Qnil;
 }
 \f
+/* Return the foreground process group for the tty/pty that
+   the process P uses.  */
+static int
+emacs_get_tty_pgrp (p)
+     struct Lisp_Process *p;
+{
+  int gid = -1;
+
+#ifdef TIOCGPGRP 
+  if (ioctl (XINT (p->infd), TIOCGPGRP, &gid) == -1 && ! NILP (p->tty_name))
+    {
+      int fd;
+      /* Some OS:es (Solaris 8/9) does not allow TIOCGPGRP from the
+        master side.  Try the slave side.  */
+      fd = emacs_open (XSTRING (p->tty_name)->data, O_RDONLY, 0);
+
+      if (fd != -1)
+       {
+         ioctl (fd, TIOCGPGRP, &gid);
+         emacs_close (fd);
+       }
+    }
+#endif /* defined (TIOCGPGRP ) */
+
+  return gid;
+}
+
 DEFUN ("process-running-child-p", Fprocess_running_child_p,
        Sprocess_running_child_p, 0, 1, 0,
   "Return t if PROCESS has given the terminal to a child.\n\
@@ -3582,7 +3609,7 @@ return t unconditionally.")
 {
   /* Initialize in case ioctl doesn't exist or gives an error,
      in a way that will cause returning t.  */
-  int gid = 0;
+  int gid;
   Lisp_Object proc;
   struct Lisp_Process *p;
 
@@ -3596,12 +3623,7 @@ return t unconditionally.")
     error ("Process %s is not active",
           XSTRING (p->name)->data);
 
-#ifdef TIOCGPGRP 
-  if (!NILP (p->subtty))
-    ioctl (XFASTINT (p->subtty), TIOCGPGRP, &gid);
-  else
-    ioctl (XINT (p->infd), TIOCGPGRP, &gid);
-#endif /* defined (TIOCGPGRP ) */
+  gid = emacs_get_tty_pgrp (p);
 
   if (gid == XFASTINT (p->pid))
     return Qnil;
@@ -3748,19 +3770,14 @@ process_send_signal (process, signo, current_group, nomsg)
         But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
         His patch indicates that if TIOCGPGRP returns an error, then
         we should just assume that p->pid is also the process group id.  */
-      {
-       int err;
 
-       if (!NILP (p->subtty))
-         err = ioctl (XFASTINT (p->subtty), TIOCGPGRP, &gid);
-       else
-         err = ioctl (XINT (p->infd), TIOCGPGRP, &gid);
+      gid = emacs_get_tty_pgrp (p);
 
 #ifdef pfa
-       if (err == -1)
-         gid = - XFASTINT (p->pid);
+      if (gid == -1)
+        gid = - XFASTINT (p->pid);
 #endif /* ! defined (pfa) */
-      }
+
       if (gid == -1)
        no_pgrp = 1;
       else
@@ -3822,7 +3839,10 @@ process_send_signal (process, signo, current_group, nomsg)
   /* gid may be a pid, or minus a pgrp's number */
 #ifdef TIOCSIGSEND
   if (!NILP (current_group))
-    ioctl (XINT (p->infd), TIOCSIGSEND, signo);
+    {
+      if (ioctl (XINT (p->infd), TIOCSIGSEND, signo) == -1)
+       EMACS_KILLPG (-gid, signo);
+    }
   else
     {
       gid = - XFASTINT (p->pid);