dd[?] File descriptors (!fd in r1)

Usage: dd Descriptors commands

• dd List file descriptors
• dd <file> Open and map that file into the UI
• dd-<fd> Close stdout fd
• dd* List file descriptors (in radare commands)
• dds <fd> <off> Seek given fd)
• ddd <fd1> <fd2> Dup2 from fd1 to fd2
• ddr <fd> <size> Read N bytes from fd
• ddw <fd> <hexpairs> Write N bytes to fd