A major option specifies the mode in which cpio operates: create, extract, or pass-through.
You must include exactly one of these options. Options preceded by a double hyphen (––) work under Linux only. Options named with a single letter and preceded by a single hyphen work under Linux and OS X.
(copy-in mode) Reads the archive from standard input and extracts files. Without a pattern-list, cpio extracts all files from the archive. With a pattern-list, cpio extracts only files with names that match one of the patterns in pattern-list. The following example extracts from the device mounted on /dev/sde1 only those files whose names end in .c:
$ cpio -i \*.c < /dev/sde1
The backslash prevents the shell from expanding ...