From 2563b926ad91bfd2deda877a53eb09ad5c1775e5 Mon Sep 17 00:00:00 2001
From: Jonas 'Sortie' Termansen <sortie@maxsi.org>
Date: Sat, 19 Nov 2016 20:45:53 +0100
Subject: [PATCH] Add posix_openpt(3).

---
 libc/Makefile              |  1 +
 libc/include/stdlib.h      |  7 +++++--
 libc/stdlib/posix_openpt.c | 26 ++++++++++++++++++++++++++
 3 files changed, 32 insertions(+), 2 deletions(-)
 create mode 100644 libc/stdlib/posix_openpt.c

diff --git a/libc/Makefile b/libc/Makefile
index 9354b55d..90208253 100644
--- a/libc/Makefile
+++ b/libc/Makefile
@@ -535,6 +535,7 @@ stdlib/mkostemps.o \
 stdlib/mkstemp.o \
 stdlib/mkstemps.o \
 stdlib/on_exit.o \
+stdlib/posix_openpt.o \
 stdlib/rand.o \
 stdlib/realpath.o \
 stdlib/setenv.o \
diff --git a/libc/include/stdlib.h b/libc/include/stdlib.h
index d8f4f02f..e5b542c5 100644
--- a/libc/include/stdlib.h
+++ b/libc/include/stdlib.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2011, 2012, 2013, 2014, 2015 Jonas 'Sortie' Termansen.
+ * Copyright (c) 2011, 2012, 2013, 2014, 2015, 2016 Jonas 'Sortie' Termansen.
  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
@@ -159,7 +159,6 @@ long lrand48(void);
 long mrand48(void);
 long nrand48(unsigned short[3]);
 int posix_memalign(void**, size_t, size_t);
-int posix_openpt(int);
 char* ptsname(int);
 long random(void);
 int rand_r(unsigned *);
@@ -171,6 +170,10 @@ void srandom(unsigned);
 int unlockpt(int);
 #endif
 
+#if __USE_SORTIX || 600 <= __USE_XOPEN
+int posix_openpt(int);
+#endif
+
 /* Functions copied from elsewhere. */
 #if __USE_SORTIX
 uint32_t arc4random(void);
diff --git a/libc/stdlib/posix_openpt.c b/libc/stdlib/posix_openpt.c
new file mode 100644
index 00000000..c20abdb6
--- /dev/null
+++ b/libc/stdlib/posix_openpt.c
@@ -0,0 +1,26 @@
+/*
+ * Copyright (c) 2016 Jonas 'Sortie' Termansen.
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * stdlib/posix_openpt.c
+ * Open a pseudoterminal master.
+ */
+
+#include <fcntl.h>
+#include <stdlib.h>
+
+int posix_openpt(int flags)
+{
+	return open("/dev/ptmx", flags);
+}