debian man page for io_closeonexec

io_closeonexec(3)					     Library Functions Manual						 io_closeonexec(3)

NAME
       io_closeonexec - mark a file descriptor non-inheritable

SYNTAX
       #include <io.h>

       void io_closeonexec(int64 fd);

DESCRIPTION
       io_closeonexec  marks  a  file  descriptor  non-inheritable.  It will be automatically closed if the process executes a different one.  The
       descriptor will not be automatically closed when you fork() a new child process, though.

SEE ALSO
       io_wait(3), io_canwrite(3)

																 io_closeonexec(3)