summaryrefslogtreecommitdiffstats
path: root/arch/um/drivers/tty.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/um/drivers/tty.c')
-rw-r--r--arch/um/drivers/tty.c92
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 0000000..6fbb670
--- /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:
+ */
OpenPOWER on IntegriCloud