1 files changed, 61 insertions, 0 deletions
diff --git a/arch/um/os-Linux/tty.c b/arch/um/os-Linux/tty.c
new file mode 100644
index 00000000000..4cfdd18ea1e
--- /dev/null
+++ b/arch/um/os-Linux/tty.c
@@ -0,0 +1,61 @@
+/* 
+ * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#include <stdlib.h>
+#include <errno.h>
+#include "os.h"
+#include "user.h"
+#include "kern_util.h"
+
+struct grantpt_info {
+	int fd;
+	int res;
+	int err;
+};
+
+static void grantpt_cb(void *arg)
+{
+	struct grantpt_info *info = arg;
+
+	info->res = grantpt(info->fd);
+	info->err = errno;
+}
+
+int get_pty(void)
+{
+	struct grantpt_info info;
+	int fd;
+
+	fd = os_open_file("/dev/ptmx", of_rdwr(OPENFLAGS()), 0);
+	if(fd < 0){
+		printk("get_pty : Couldn't open /dev/ptmx - err = %d\n", -fd);
+		return(fd);
+	}
+
+	info.fd = fd;
+	initial_thread_cb(grantpt_cb, &info);
+
+	if(info.res < 0){
+		printk("get_pty : Couldn't grant pty - errno = %d\n", 
+		       -info.err);
+		return(-1);
+	}
+	if(unlockpt(fd) < 0){
+		printk("get_pty : Couldn't unlock pty - errno = %d\n", errno);
+		return(-1);
+	}
+	return(fd);
+}
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */