[PATCH 2/2] pstree: New applet, v6

[Lauri Kasanen]

Morning.

After finally managing to understand the uhm.. nice function procps_scan, I could drop ~700 bytes from pstree. Adding the -p option (from Eric) adds back ~100 bytes.

Thus, v6 is ~600 bytes smaller than v5. I'm afraid I'm out of obvious and non-obvious size reduction targets now, though.


v6:
- shrink by removing out_int
- size shrink by replacing read_proc with procps_scan
	It was possible afterall ;) but only after the separation of check_thread.
- shrink: move thread check to procps_scan
- wrap unicode support in out_char in ENABLE_UNICODE
- support the -p option (Eric Lammerts)

function                                             old     new   delta
dump_tree                                              -     802    +802
pstree_main                                            -     449    +449
add_proc                                               -     221    +221
.rodata                                             8867    9023    +156
dump_by_user                                           -     111    +111
tree_equal                                             -     105    +105
new_proc                                               -      83     +83
out_newline                                            -      61     +61
static.C                                               -      48     +48
out_char                                               -      41     +41
procps_scan                                         1175    1211     +36
packed_usage                                        1034    1060     +26
out_string                                             -      25     +25
find_proc                                              -      24     +24
applet_main                                           80      88      +8
applet_names                                          61      68      +7
applet_nameofs                                        20      22      +2
------------------------------------------------------------------------------
(add/remove: 12/1 grow/shrink: 6/0 up/down: 2205/0)          Total: 2205 bytes
   text	   data	    bss	    dec	    hex	filename
  69257	   1522	   8384	  79163	  1353b	busybox_old
  71819	   1522	   8384	  81725	  13f3d	busybox_unstripped

The above output includes the previous patch to libbb. For reference, v5 was "Total: 2759 bytes" on my machine.

- Lauri

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