1 files changed, 80 insertions, 0 deletions
diff --git a/contrib/syslinux-4.02/com32/lib/sys/rawcon_read.c b/contrib/syslinux-4.02/com32/lib/sys/rawcon_read.c
new file mode 100644
index 0000000..92c9b29
--- /dev/null
+++ b/contrib/syslinux-4.02/com32/lib/sys/rawcon_read.c
@@ -0,0 +1,80 @@
+/* ----------------------------------------------------------------------- *
+ *
+ *   Copyright 2004-2008 H. Peter Anvin - All Rights Reserved
+ *
+ *   Permission is hereby granted, free of charge, to any person
+ *   obtaining a copy of this software and associated documentation
+ *   files (the "Software"), to deal in the Software without
+ *   restriction, including without limitation the rights to use,
+ *   copy, modify, merge, publish, distribute, sublicense, and/or
+ *   sell copies of the Software, and to permit persons to whom
+ *   the Software is furnished to do so, subject to the following
+ *   conditions:
+ *
+ *   The above copyright notice and this permission notice shall
+ *   be included in all copies or substantial portions of the Software.
+ *
+ *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ *   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ *   OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ *   NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ *   HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ *   WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ *   FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ *   OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * ----------------------------------------------------------------------- */
+
+/*
+ * rawcon_read.c
+ *
+ * Character-oriented reading from the console without echo;
+ * this is a NONBLOCKING device.
+ */
+
+#include <errno.h>
+#include <string.h>
+#include <com32.h>
+#include <minmax.h>
+#include <sys/times.h>
+#include "file.h"
+
+/* Global, since it's used by stdcon_read */
+ssize_t __rawcon_read(struct file_info *fp, void *buf, size_t count)
+{
+    com32sys_t ireg, oreg;
+    char *bufp = buf;
+    size_t n = 0;
+    clock_t start;
+
+    (void)fp;
+
+    memset(&ireg, 0, sizeof ireg);
+
+    start = times(NULL);
+
+    while (n < count) {
+	/* Poll */
+	ireg.eax.b[1] = 0x0B;
+	__intcall(0x21, &ireg, &oreg);
+	if (!oreg.eax.b[0])
+	    break;
+
+	/* We have data, go get it */
+	ireg.eax.b[1] = 0x08;
+	__intcall(0x21, &ireg, &oreg);
+	*bufp++ = oreg.eax.b[0];
+	n++;
+    }
+
+    return n;
+}
+
+const struct input_dev dev_rawcon_r = {
+    .dev_magic = __DEV_MAGIC,
+    .flags = __DEV_TTY | __DEV_INPUT,
+    .fileflags = O_RDONLY,
+    .read = __rawcon_read,
+    .close = NULL,
+    .open = NULL,
+};