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From: Balbir Singh <balbir@linux.vnet.ibm.com>
Changelog v3..v4
1. Add _end() method for the iterator
Changelog v3..v2
1. Move to iterator based design
Changelog v2..v1
1. Add base path and depth semantics for walking
This patch adds the capability to walk cgroups by providing a new API
called cgroup_walk_tree. The API accepts the controller to walk and the
order in which the directories and files must be visited. The code is
implemented as an iterator, the begin function starts the walk and
we have depth control. The next function gets the following node
and returns ECGEOF when done.
libcgroup.map has been updated to reflect the same change and the prototype
is exported in libcgroup.h.
I've also added test cases (tests/walk_test.c). Sample output is show
root is /cgroup/cpu///
path , parent , relative /, full /cgroup/cpu///
path l3, parent , relative /l3, full /cgroup/cpu///l3
path ll1, parent l3, relative /l3/ll1, full /cgroup/cpu///l3/ll1
path lll1, parent ll1, relative /l3/ll1/lll1, full /cgroup/cpu///l3/ll1/lll1
path l2, parent , relative /l2, full /cgroup/cpu///l2
path ll1, parent l2, relative /l2/ll1, full /cgroup/cpu///l2/ll1
path lll1, parent ll1, relative /l2/ll1/lll1, full /cgroup/cpu///l2/ll1/lll1
path l1, parent , relative /l1, full /cgroup/cpu///l1
path ll1, parent l1, relative /l1/ll1, full /cgroup/cpu///l1/ll1
path lll1, parent ll1, relative /l1/ll1/lll1, full /cgroup/cpu///l1/ll1/lll1
path a, parent , relative /a, full /cgroup/cpu///a
path e, parent a, relative /a/e, full /cgroup/cpu///a/e
path f, parent e, relative /a/e/f, full /cgroup/cpu///a/e/f
path f, parent a, relative /a/f, full /cgroup/cpu///a/f
path x, parent a, relative /a/x, full /cgroup/cpu///a/x
path b, parent a, relative /a/b, full /cgroup/cpu///a/b
path c, parent b, relative /a/b/c, full /cgroup/cpu///a/b/c
path d, parent c, relative /a/b/c/d, full /cgroup/cpu///a/b/c/d
path default, parent , relative /default, full /cgroup/cpu///default
root is /cgroup/cpu//a/
path , parent , relative /, full /cgroup/cpu//a/
path e, parent , relative /e, full /cgroup/cpu//a/e
path f, parent e, relative /e/f, full /cgroup/cpu//a/e/f
path f, parent , relative /f, full /cgroup/cpu//a/f
path x, parent , relative /x, full /cgroup/cpu//a/x
path b, parent , relative /b, full /cgroup/cpu//a/b
path c, parent b, relative /b/c, full /cgroup/cpu//a/b/c
Walking the first 5 nodes
root is /cgroup/cpu///
path , parent , relative /, full /cgroup/cpu///
path l3, parent , relative /l3, full /cgroup/cpu///l3
path ll1, parent l3, relative /l3/ll1, full /cgroup/cpu///l3/ll1
path lll1, parent ll1, relative /l3/ll1/lll1, full /cgroup/cpu///l3/ll1/lll1
NOTE: Parent directory is represented by an empty (not NULL) string "".
The length of the string is 0.
Signed-off-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Signed-off-by: Dhaval Giani <dhaval@linux.vnet.ibm.com>
git-svn-id: https://libcg.svn.sourceforge.net/svnroot/libcg/trunk@356 4f4bb910-9a46-0410-90c8-c897d4f1cd53
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