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-rw-r--r--Src/Modules/zpty.c29
1 files changed, 23 insertions, 6 deletions
diff --git a/Src/Modules/zpty.c b/Src/Modules/zpty.c
index 08ec1b2bd..360d1cc63 100644
--- a/Src/Modules/zpty.c
+++ b/Src/Modules/zpty.c
@@ -160,12 +160,31 @@ getptycmd(char *name)
 #include <sys/stropts.h>
 #endif
 
+#if defined(I_FIND) && defined(I_PUSH)
+/*
+ * These tests are ad hoc.  Unfortunately if you get the wrong ioctl,
+ * STREAMS simply hangs up, so there's no obvious way of doing this
+ * more systematically.
+ *
+ * Apparently Solaris needs all three ioctls, but HP-UX doesn't need
+ * ttcompat.  The Solaris definition has been extended to all __SVR4
+ * as a guess; I have no idea if this is right.
+ */
+#ifdef __SVR4
+#define USE_STREAMS_IOCTLS
+#define USE_STREAMS_TTCOMPAT
+#endif
+#ifdef __hpux
+#define USE_STREAMS_IOCTLS
+#endif
+#endif
+
 static int
 get_pty(int master, int *retfd)
 {
     static char *name;
     static int mfd, sfd;
-#if defined(I_FIND) && defined(I_PUSH) && defined(__SVR4)
+#ifdef USE_STREAMS_IOCTLS
     int ret;
 #endif
 
@@ -190,11 +209,7 @@ get_pty(int master, int *retfd)
 	close(mfd);
 	return 1;
     }
-#if defined(I_FIND) && defined(I_PUSH) && defined(__SVR4)
-    /*
-     * Use if STREAMS is available.  The test is probably OK,
-     * but we could use e.g. the sys/stropts.h test.
-     */
+#ifdef USE_STREAMS_IOCTLS
     if ((ret = ioctl(sfd, I_FIND, "ptem")) != 1)
        if (ret == -1 || ioctl(sfd, I_PUSH, "ptem") == -1) {
 	   close(mfd);
@@ -207,6 +222,7 @@ get_pty(int master, int *retfd)
 	   close(sfd);
 	   return 1;
        }
+#ifdef USE_STREAMS_TTCOMPAT
     if ((ret = ioctl(sfd, I_FIND, "ttcompat")) != 1)
        if (ret == -1 || ioctl(sfd, I_PUSH, "ttcompat") == -1) {
 	   close(mfd);
@@ -214,6 +230,7 @@ get_pty(int master, int *retfd)
 	   return 1;
        }
 #endif
+#endif
 
     *retfd = sfd;