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test-cgroup-util: add a "test" to print out cg_is_*_wanted() values

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This isn't terribly useful because /sys/fs/cgroup will usually be mounted.
But it at least allows checking if the values make sense in this case.
This commit is contained in:
Zbigniew Jędrzejewski-Szmek 2017-02-22 19:57:11 -05:00
parent c19739db9e
commit 0a05dcc09d
1 changed files with 47 additions and 0 deletions
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47
src/test/test-cgroup-util.c
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@ -18,11 +18,13 @@
***/
#include "alloc-util.h"
#include "build.h"
#include "cgroup-util.h"
#include "dirent-util.h"
#include "fd-util.h"
#include "format-util.h"
#include "parse-util.h"
#include "proc-cmdline.h"
#include "process-util.h"
#include "stat-util.h"
#include "string-util.h"
@ -332,7 +334,49 @@ static void test_fd_is_cgroup_fs(void) {
fd = safe_close(fd);
}
static void test_is_wanted_print(bool header) {
_cleanup_free_ char *cmdline = NULL;
log_info("-- %s --", __func__);
assert_se(proc_cmdline(&cmdline) >= 0);
log_info("cmdline: %s", cmdline);
if (header) {
log_info(_CGROUP_HIEARCHY_);
(void) system("findmnt -n /sys/fs/cgroup");
}
log_info("is_unified_wanted() → %s", yes_no(cg_is_unified_wanted()));
log_info("is_hybrid_wanted() → %s", yes_no(cg_is_hybrid_wanted()));
log_info("is_legacy_wanted() → %s", yes_no(cg_is_legacy_wanted()));
log_info(" ");
}
static void test_is_wanted(void) {
assert_se(setenv("SYSTEMD_PROC_CMDLINE",
"systemd.unified_cgroup_hierarchy", 1) >= 0);
test_is_wanted_print(false);
assert_se(setenv("SYSTEMD_PROC_CMDLINE",
"systemd.unified_cgroup_hierarchy=0", 1) >= 0);
test_is_wanted_print(false);
assert_se(setenv("SYSTEMD_PROC_CMDLINE",
"systemd.unified_cgroup_hierarchy=0 "
"systemd.legacy_systemd_cgroup_controller", 1) >= 0);
test_is_wanted_print(false);
assert_se(setenv("SYSTEMD_PROC_CMDLINE",
"systemd.unified_cgroup_hierarchy=0 "
"systemd.legacy_systemd_cgroup_controller=0", 1) >= 0);
test_is_wanted_print(false);
}
int main(void) {
log_set_max_level(LOG_DEBUG);
log_parse_environment();
log_open();
test_path_decode_unit();
test_path_get_unit();
test_path_get_user_unit();
@ -349,6 +393,9 @@ int main(void) {
TEST_REQ_RUNNING_SYSTEMD(test_mask_supported());
TEST_REQ_RUNNING_SYSTEMD(test_is_cgroup_fs());
TEST_REQ_RUNNING_SYSTEMD(test_fd_is_cgroup_fs());
test_is_wanted_print(true);
test_is_wanted_print(false); /* run twice to test caching */
test_is_wanted();
return 0;
}