NAME

       nccnav, nccnavi - explore the output of nccgen on a text-mode console

SYNOPSIS

       nccnav [Code.map]
       nccnavi [Code.map]

DESCRIPTION

       This manual page documents briefly the nccnav command which can be used to browse the output generated by
       nccgen on a set of C / C++ files.

COMMANDS (Mode 1)

       When first invoked, nccnav will display a list of source files.

       Arrow keys / Page up / Page down
              Can be used to navigate to the desired file

       Enter  Selects a file and takes the user to Mode 2

       q      Takes the user back to the previous screen

       O      Displays a list of all the functions in the selected file

       a-z A-Z (except q)
              Moves the cursor to the function beginning with the specified character

       E      Displays a list of all functions not called by any other function

       G      Displays a list of all the global variables

COMMANDS (Mode 2)

       This mode is oriented around a resource which can be  a:  file,  function,  global  variable,  member  of
       structure, structure

       For  any  of  the  above, all the related resources are listed.  For example, in the case of a <function>
       there are:

       1. File(s) with <function> definition (may not exist)
       2. Functions calling <function> (Blue)
       3. Global variables used by <function> (Red)
       4. <function-herself>
       5. Functions called by <function>
            Dim grey: functions that do not call any other functions.
            Brown: functions that do call other functions.
            Red: Recursion detector alert (if enabled)
       6. Structure members used by <function> (Dark grey)

       1-6 <ENTER>
              Recursively enter MODE 2 for that resource.

       q      Pressing enter on 4 or typing 'q' will return to the previous screen.

       BACKSPACE
              The INITIAL SCREENS with a longjmp.

       <      The HISTORY MODE.

       r      Pressing 'r' on a red 5 get you to the UNROLL MODE.

       m      Pressing 'm' on a function will get you to the POP-UP MODE

       C      Pressing 'C' will run system("bash")

INTERNAL SOURCE VIEWER

       Pressing <SPACE> on:

       ... a structure:
                   Will extract and display the structure and declaration text.

       ... a function:
                   Will display the function text  as  found  in  the  file  which  contains       the  function
              definition. For this to work, nccnav must be in the      correct root directory or paths should be
              absolute. The ncc option      -ncfabs is rather useful.

                   Note that if a function reports to be defined in more than one      files, this will probably
              fail.   This  happens because nccgen does      not distinguish different static functions with the
              same name.       They are considered the same thing and their resources are      mixed in  nccnav.
              Currently, if nccnav detects more than one      files for a function it will issue a warning.

       ... a file in Mode 2:
                   Will display the contents of the entire file.

              By  default,  the  internal  source  viewer  uses less.  When invoked via the nccnavi command, the
              source code is automatically indented and viewed through less.

RECURSION DETECTOR

       The recursion detector is enabled by default.

       It can be disabled by pressing 'R' while in MODE 2. (it's supposed to be expensive and may be confusing)

       The recursion detector works in MODE 2 and if the current resource is a function. In this  case  it  will
       paint RED all the functions called by the current function, which will eventually lead back to it by some
       way of recursion.

       Pressing 'r' on one of the red ones will display one of the possible paths through  which  recursion  can
       happen. Currently there is no way to view alternative paths.

       In  this  mode,  'q' will get you back while enter will proceed ahead deeper into MODE 2 for the selected
       resource.

POPUP MODE

       This is an alternative way to browse the call flow and is entered by pressing 'm' on a function  in  MODE
       2.

       Pop-up  menus are generated, where the top element is a function and below it all the functions called by
       it. Movement is possible with the UP/DOWN arrows.

       <enter> or RIGHT will expand a new pop-up for the current function.  q or LEFT  will  close  the  current
       pop-up and activate the previous one.  SPACE is available to view the source code.

       BACKSPACE will close all the popups and return to MODE 2.

       Pressing '2' will enter MODE 2 for the current selected element.  In this case, HISTORY and BACKSPACE are
       set at this breakpoint.

HISTORY MODE

       At any time you can press '<' and '>' to browse through all the previous screens. <enter> on one of  them
       will jump back to that screen. Any other key will exit the HISTORY MODE.

EXAMPLE

       Supposing  you've  compiled  the  linux kernel with nccgen.  Collecting all the .nccout files can be done
       with :

       find . -name \*.nccout | xargs cat > kernel.map

       You can use pathremover to truncate long paths in `kernel.map'.

       find . -name \*.nccout | xargs cat | pathremover /mnt/src/hacks/linux-2.4.10/ > kernel.map

       Then, that's viewed with:

       nccnav kernel.map

       For more information on using nccgen on the Linux kernel, please refer to:

            /usr/share/doc/ncc/hacking.LINUX-KERNEL

SEE ALSO

       nccgen(1)

AUTHOR

       nccnav was written by Stelios Xanthakis <sxanth@ceid.upatras.gr>.

                                               September 10, 2006                                      NCCNAV(1)