Clean out some IRIX cruft

* etc/MACHINES: Remove obsolete discussion of IRIX.
* src/process.c (allocate_pty) [__sgi]: Remove SGI-specific code.
(create_process) [HAVE_PTYS]: Don't worry about IRIX.
* src/syntax.c (scan_sexps_forward): Remove obsolete comment.
* src/unexelf.c [__sgi]: Don't include <syms.h>.
(unexec) [__sgi]: Remove SGI-specific code.

1 files changed, 2 insertions, 7 deletions

diff --git a/src/process.c b/src/process.c
index 49340b120ef..8ab73bd9ae6 100644
--- a/src/process.c
+++ b/src/process.c
@@ -690,11 +690,7 @@ allocate_pty (char pty_name[PTY_NAME_SIZE])
             if (faccessat (AT_FDCWD, pty_name, R_OK | W_OK, AT_EACCESS) != 0)
               {
                 emacs_close (fd);
-# ifndef __sgi
                 continue;
-# else
-                return -1;
-# endif /* __sgi */
               }
             setup_pty (fd);
             return fd;
@@ -1886,9 +1882,8 @@ create_process (Lisp_Object process, char **new_argv, Lisp_Object current_dir)
       /* Make the pty be the controlling terminal of the process.  */
 #ifdef HAVE_PTYS
       /* First, disconnect its current controlling terminal.  */
-      /* We tried doing setsid only if pty_flag, but it caused
-         process_set_signal to fail on SGI when using a pipe.  */
-      setsid ();
+      if (pty_flag)
+        setsid ();
       /* Make the pty's terminal the controlling terminal.  */
       if (pty_flag && forkin >= 0)
         {