1 files changed, 102 insertions, 0 deletions
diff --git a/fdisk/llseek.c b/fdisk/llseek.c
new file mode 100644
index 000000000..a9cd5a3ac
--- /dev/null
+++ b/fdisk/llseek.c
@@ -0,0 +1,102 @@
+/*
+ * llseek.c -- stub calling the llseek system call
+ *
+ * Copyright (C) 1994 Remy Card.  This file may be redistributed
+ * under the terms of the GNU Public License.
+ */
+
+#include <sys/types.h>
+
+#include <errno.h>
+#include <unistd.h>
+
+#if defined(__GNUC__) || defined(HAS_LONG_LONG)
+typedef long long       ext2_loff_t;
+#else
+typedef long            ext2_loff_t;
+#endif
+
+extern ext2_loff_t ext2_llseek (unsigned int, ext2_loff_t, unsigned int);
+
+#ifdef __linux__
+
+#ifdef HAVE_LLSEEK
+#include <syscall.h>
+
+#else	/* HAVE_LLSEEK */
+
+#ifdef __alpha__
+
+#define my_llseek lseek
+
+#else
+#include <linux/unistd.h>	/* for __NR__llseek */
+
+static int _llseek (unsigned int, unsigned long,
+		   unsigned long, ext2_loff_t *, unsigned int);
+
+static _syscall5(int,_llseek,unsigned int,fd,unsigned long,offset_high,
+		 unsigned long, offset_low,ext2_loff_t *,result,
+		 unsigned int, origin)
+
+static ext2_loff_t my_llseek (unsigned int fd, ext2_loff_t offset,
+		unsigned int origin)
+{
+	ext2_loff_t result;
+	int retval;
+
+	retval = _llseek (fd, ((unsigned long long) offset) >> 32,
+			((unsigned long long) offset) & 0xffffffff,
+			&result, origin);
+	return (retval == -1 ? (ext2_loff_t) retval : result);
+}
+
+#endif /* __alpha__ */
+
+#endif	/* HAVE_LLSEEK */
+
+ext2_loff_t ext2_llseek (unsigned int fd, ext2_loff_t offset,
+			 unsigned int origin)
+{
+	ext2_loff_t result;
+	static int do_compat = 0;
+
+	if (!do_compat) {
+		result = my_llseek (fd, offset, origin);
+		if (!(result == -1 && errno == ENOSYS))
+			return result;
+
+		/*
+		 * Just in case this code runs on top of an old kernel
+		 * which does not support the llseek system call
+		 */
+		do_compat = 1;
+		/*
+		 * Now try ordinary lseek.
+		 */
+	}
+
+	if ((sizeof(off_t) >= sizeof(ext2_loff_t)) ||
+	    (offset < ((ext2_loff_t) 1 << ((sizeof(off_t)*8) -1))))
+		return lseek(fd, (off_t) offset, origin);
+
+	errno = EINVAL;
+	return -1;
+}
+
+#else /* !linux */
+
+ext2_loff_t ext2_llseek (unsigned int fd, ext2_loff_t offset,
+			 unsigned int origin)
+{
+	if ((sizeof(off_t) < sizeof(ext2_loff_t)) &&
+	    (offset >= ((ext2_loff_t) 1 << ((sizeof(off_t)*8) -1)))) {
+		errno = EINVAL;
+		return -1;
+	}
+	return lseek (fd, (off_t) offset, origin);
+}
+
+#endif 	/* linux */
+
+