* Alejandro Colomar: > The Linux kernel uses 'unsigned int' instead of 'int' for 'fd' and > 'whence'. As glibc provides no wrapper, use the same types the > kernel uses. lseek is a POSIX interface, and glibc provides it. POSIX uses int for file descriptors (and the whence parameter in case of lseek). The llseek system call is a different matter, that's indeed Linux-specific.