#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <sys/uio.h>

#include "../internal/syscall.h"

/*
 * writev: gather write — the kernel writes the iovcnt buffers of iov in
 * order and returns the total byte count. The iovec array is passed straight
 * to SYS_writev: no argument validation here, the kernel applies its own
 * rules (iovcnt 0..IOV_MAX, iov NULL with iovcnt > 0 faults as EFAULT). The
 * raw result goes through syscall_ret(), which returns the count on success
 * and -1 with errno set on error; errno is untouched on success.
 */
ssize_t
writev(int fd, const struct iovec *iov, int iovcnt)
{
    return syscall_ret(__syscall3(SYS_writev, fd, (long)iov, (long)iovcnt));
}