1 files changed, 99 insertions, 0 deletions
diff --git a/contrib/syslinux-4.02/com32/lib/sys/opendev.c b/contrib/syslinux-4.02/com32/lib/sys/opendev.c
new file mode 100644
index 0000000..1df9d07
--- /dev/null
+++ b/contrib/syslinux-4.02/com32/lib/sys/opendev.c
@@ -0,0 +1,99 @@
+/* ----------------------------------------------------------------------- *
+ *
+ *   Copyright 2003-2008 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.
+ *
+ * ----------------------------------------------------------------------- */
+
+#include <errno.h>
+#include <com32.h>
+#include <string.h>
+#include <unistd.h>
+#include "file.h"
+
+/*
+ * opendev.c
+ *
+ * Open a special device
+ */
+
+int opendev(const struct input_dev *idev,
+	    const struct output_dev *odev, int flags)
+{
+    int fd;
+    struct file_info *fp;
+    int okflags;
+    int e;
+
+    okflags = (idev ? idev->fileflags : 0) | (odev ? odev->fileflags : 0);
+
+    if (!(flags & 3) || (flags & ~okflags)) {
+	errno = EINVAL;
+	return -1;
+    }
+
+    for (fd = 0, fp = __file_info; fd < NFILES; fd++, fp++)
+	if (!fp->iop && !fp->oop)
+	    break;
+
+    if (fd >= NFILES) {
+	errno = EMFILE;
+	return -1;
+    }
+
+    /* The file structure is already zeroed */
+    fp->iop = &dev_error_r;
+    fp->oop = &dev_error_w;
+    fp->i.datap = fp->i.buf;
+
+    if (idev) {
+	if (idev->open && (e = idev->open(fp))) {
+	    errno = e;
+	    goto puke;
+	}
+	fp->iop = idev;
+    }
+
+    while (odev) {
+	if (odev->open && (e = odev->open(fp))) {
+	    if (e == EAGAIN) {
+		if (odev->fallback) {
+		    odev = odev->fallback;
+		    continue;
+		} else {
+		    e = EIO;
+		}
+	    }
+	    errno = e;
+	    goto puke;
+	}
+	fp->oop = odev;
+	break;
+    }
+
+    return fd;
+
+puke:
+    close(fd);
+    return -1;
+}