pm[?] [magic]
print libmagic data (see pm? and /m?)
|Usage: pm [file|directory]
| r_magic will use given file/dir as reference
| output of those magic can contain expressions like:
| foo@0x40 # use 'foo' magic file on address 0x40
| @0x40 # use current magic file on address 0x40
| \n # append newline
| e dir.magic # defaults to /home/ubuntu/bin/prefix/radare2//share/radare2/2.1.0-git/magic
| /m # search for magic signatures