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-rw-r--r--include/os.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/os.h b/include/os.h
index 7b20d606dd0..7661078d336 100644
--- a/include/os.h
+++ b/include/os.h
@@ -52,6 +52,14 @@ off_t os_lseek(int fd, off_t offset, int whence);
#define OS_SEEK_END 2
/**
+ * os_filesize() - Calculate the size of a file
+ *
+ * @fd: File descriptor as returned by os_open()
+ * Return: file size or negative error code
+ */
+int os_filesize(int fd);
+
+/**
* Access to the OS open() system call
*
* @pathname: Pathname of file to open