Re: script to unravel nested C header files?

Jeffrey Hsu <hsu@alumni.EECS.Berkeley.EDU>
- I recall someone once posted a very handy script (in perl I believe)
- to print out which header files were included by a C file, with
- the proper level of indentation for nested includes.


Something like (for my sample input, addrs.c):


/lib/cpp addrs.c | awk '/^# / {if ($2 == 1) { print substr(" ",
0, depth * 2) $3; lvl[$3] = ++depth; } else depth = lvl[$3]; }' | sed 's/"//g'


(join the lines), results in (for example):


addrs.c
    /usr/include/sys/param.h
        /usr/include/ansi_compat.h
        /usr/include/machine/param.h
        /usr/include/signal.h
            /usr/include/ansi_compat.h
        /usr/include/sys/types.h
            /usr/include/ansi_compat.h
        /usr/include/sys/smp_lock.h
            /usr/include/ansi_compat.h
    /usr/include/stdio.h
        /usr/include/ansi_compat.h
    /usr/include/ctype.h
    /usr/include/strings.h
    ./misc.h
    ./structs.h
        ./headers.h


Sorry, no perl. Good for giggles with kernel source or most anything X11.


Beorn Johnson
(beorn@eecs.berkeley.edu)
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