Initial revision

diff --git a/src/s/irix4-0.h b/src/s/irix4-0.h
new file mode 100644 (file)
index 0000000..fe057c2
--- /dev/null
+++ b/src/s/irix4-0.h
@@ -0,0 +1,45 @@
+#include "irix3-3.h"
+
+#define USG5_3
+
+/* Define HAVE_ALLOCA to say that the system provides a properly
+   working alloca function and it should be used. */
+#define HAVE_ALLOCA
+#undef C_ALLOCA
+#define alloca __builtin_alloca
+
+/* use K&R C */
+#define C_SWITCH_MACHINE -cckr
+
+/* SGI has all the fancy wait stuff, but we can't include sys/wait.h
+   because it defines BIG_ENDIAN and LITTLE_ENDIAN (ugh!.)  Instead
+   we'll just define WNOHANG right here.
+   (An implicit decl is good enough for wait3.)  */
+
+#define WNOHANG                0x1
+
+/* No need to use sprintf to get the tty name--we get that from _getpty.  */
+#define PTY_TTY_NAME_SPRINTF
+/* No need to get the pty name at all.  */
+#define PTY_NAME_SPRINTF
+#ifdef emacs
+char *_get_pty();
+#endif
+/* We need only try once to open a pty.  */
+#define PTY_ITERATION
+/* Here is how to do it.  */
+/* It is necessary to prevent SIGCHLD signals within _getpty.
+   So we block them. */
+#define PTY_OPEN                                               \
+{                                                              \
+  int mask = sigblock (sigmask (SIGCHLD));                     \
+  char *name = _getpty (&fd, O_RDWR | O_NDELAY, 0600, 0);      \
+  sigsetmask(mask);                                            \
+  if (name == 0)                                               \
+    return -1;                                                 \
+  if (fd < 0)                                                  \
+    return -1;                                                 \
+  if (fstat (fd, &stb) < 0)                                    \
+    return -1;                                                 \
+  strcpy (pty_name, name);                                     \
+}