The following are demonstrations of the whatexec.d script.

Here we run it while a few commands are also executed,

# ./whatexec.d

PEXEC EXEC OK TYPE

bash /usr/bin/clear Y #!/u\0

bash /sbin/sh Y \177ELF\0

clear /usr/bin/tput Y \177ELF\0

bash /export/home/brendan/DOOM.EXE N MZ\644\0

^C

whatexec.d has first found that "clear" was run, which has a type that

begins with "#!" - a script. clear runs "sh" and "tput", both ELF files.

We finish by attempting to run a MZ file, "DOOM.EXE", which is rejected

(OK is "N").