This patch adds option new option "-i" to lssubsys tool. This option displays
for mount controllers
the number of hierarchie in which they are:
SEMANTIC:
lssubsys [-m|--mount-points] [-i|--hierarchies] [-a|--all]
-i, --hierrachies
Display attached hierarchy number, if the subsystem is in a
hierrachy.
If the option -m is used too, then the hierarchy number is
shown only for not mounted hierarchies.
EXAMPLE:
$ lssubsys -ami
ns
cpuset 5
cpu,devices 6
cpuacct /cgroup/cpuacct
memory /cgroup/memory
freezer /cgroup/freezer
net_cls /cgroup/net_cls
$ lssubsys -ai
ns
cpuset 5
cpu,devices 6
cpuacct 7
memory 8
freezer 9
net_cls 4
Signed-off-by: Ivana Hutarova Varekova <[email protected]>
---
src/tools/lssubsys.c | 16 +++++++++++++---
1 files changed, 13 insertions(+), 3 deletions(-)
diff --git a/src/tools/lssubsys.c b/src/tools/lssubsys.c
index e48daa6..f1225be 100644
--- a/src/tools/lssubsys.c
+++ b/src/tools/lssubsys.c
@@ -22,7 +22,8 @@
enum flag{
FL_MOUNT = 1, /* show the mount points */
FL_LIST = 2,
- FL_ALL = 4 /* show all subsystems - not mounted too */
+ FL_ALL = 4, /* show all subsystems - not mounted too */
+ FL_HIERARCHY = 8 /* show info about hierarchies */
};
typedef char cont_name_t[FILENAME_MAX];
@@ -46,6 +47,8 @@ static void usage(int status, const char *program_name)
fprintf(stdout, " -a, --all "\
"Display information about all controllers "\
"(including not mounted ones) \n");
+ fprintf(stdout, " -i, --hierarchies Display information "\
+ "about hierarchies\n");
}
}
@@ -246,7 +249,10 @@ next:
}
cgroup_get_all_controller_end(&handle);
- printf("\n");
+ if (flags & FL_HIERARCHY)
+ printf(" %d\n", hierarchy);
+ else
+ printf("\n");
if (ret == ECGEOF)
ret = 0;
@@ -323,6 +329,7 @@ int main(int argc, char *argv[])
{"help", 0, 0, 'h'},
{"mount-points", 0, 0, 'm'},
{"all", 0, 0, 'a'},
+ {"hierarchies", 0, 0, 'i'},
{0, 0, 0, 0}
};
@@ -330,7 +337,7 @@ int main(int argc, char *argv[])
cont_name[i][0] = '\0';
/* parse arguments */
- while ((c = getopt_long(argc, argv, "mha", options, NULL)) > 0) {
+ while ((c = getopt_long(argc, argv, "mhai", options, NULL)) > 0) {
switch (c) {
case 'h':
usage(0, argv[0]);
@@ -341,6 +348,9 @@ int main(int argc, char *argv[])
case 'a':
flags |= FL_ALL;
break;
+ case 'i':
+ flags |= FL_HIERARCHY;
+ break;
default:
usage(1, argv[0]);
return -1;
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