1 files changed, 92 insertions, 0 deletions

diff --git a/arch/um/drivers/tty.c b/arch/um/drivers/tty.c
new file mode 100644
index 000000000000..6fbb670ee274
--- /dev/null
+++ b/arch/um/drivers/tty.c
@@ -0,0 +1,92 @@
+/* 
+ * Copyright (C) 2001 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#include <stdio.h>
+#include <termios.h>
+#include <errno.h>
+#include <unistd.h>
+#include "chan_user.h"
+#include "user_util.h"
+#include "user.h"
+#include "os.h"
+
+struct tty_chan {
+        char *dev;
+        int raw;
+        struct termios tt;
+};
+
+static void *tty_chan_init(char *str, int device, struct chan_opts *opts)
+{
+        struct tty_chan *data;
+
+        if(*str != ':'){
+                printk("tty_init : channel type 'tty' must specify "
+                       "a device\n");
+                return(NULL);
+        }
+        str++;
+
+        data = um_kmalloc(sizeof(*data));
+        if(data == NULL)
+                return(NULL);
+        *data = ((struct tty_chan) { .dev       = str,
+                                     .raw       = opts->raw });
+                                     
+        return(data);
+}
+
+static int tty_open(int input, int output, int primary, void *d,
+                    char **dev_out)
+{
+        struct tty_chan *data = d;
+        int fd, err;
+
+        fd = os_open_file(data->dev, of_set_rw(OPENFLAGS(), input, output), 0);
+        if(fd < 0) return(fd);
+        if(data->raw){
+                CATCH_EINTR(err = tcgetattr(fd, &data->tt));
+                if(err)
+                        return(err);
+
+                err = raw(fd);
+                if(err)
+                        return(err);
+        }
+
+        *dev_out = data->dev;
+        return(fd);
+}
+
+static int tty_console_write(int fd, const char *buf, int n, void *d)
+{
+        struct tty_chan *data = d;
+
+        return(generic_console_write(fd, buf, n, &data->tt));
+}
+
+struct chan_ops tty_ops = {
+        .type           = "tty",
+        .init           = tty_chan_init,
+        .open           = tty_open,
+        .close          = generic_close,
+        .read           = generic_read,
+        .write          = generic_write,
+        .console_write  = tty_console_write,
+        .window_size    = generic_window_size,
+        .free           = generic_free,
+        .winch          = 0,
+};
+
+/*
+ * 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:
+ */