The following is an example of the filebyproc.d script,

   # filebyproc.d
   dtrace: description 'syscall::open*:entry ' matched 2 probes
   CPU     ID                    FUNCTION:NAME
     0     14                       open:entry gnome-netstatus- /dev/kstat
     0     14                       open:entry man /var/ld/ld.config
     0     14                       open:entry man /lib/libc.so.1
     0     14                       open:entry man /usr/share/man/man.cf
     0     14                       open:entry man /usr/share/man/windex
     0     14                       open:entry man /usr/share/man/man1/ls.1
     0     14                       open:entry man /usr/share/man/man1/ls.1
     0     14                       open:entry man /tmp/mpqea4RF
     0     14                       open:entry sh /var/ld/ld.config
     0     14                       open:entry sh /lib/libc.so.1
     0     14                       open:entry neqn /var/ld/ld.config
     0     14                       open:entry neqn /lib/libc.so.1
     0     14                       open:entry neqn /usr/share/lib/pub/eqnchar
     0     14                       open:entry tbl /var/ld/ld.config
     0     14                       open:entry tbl /lib/libc.so.1
     0     14                       open:entry tbl /usr/share/man/man1/ls.1
     0     14                       open:entry nroff /var/ld/ld.config
   [...]

In the above example, the command "man ls" was run. Each file that was 
attempted to be opened can be seen, along with the program name responsible.