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test: add test case for setpriority_closest()

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This commit is contained in:
Lennart Poettering 2020-01-02 17:33:51 +01:00
parent 390902012c
commit 75997c3fa5
1 changed files with 90 additions and 0 deletions
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90
src/test/test-process-util.c
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@ -14,6 +14,7 @@
#include "alloc-util.h"
#include "architecture.h"
#include "errno-util.h"
#include "fd-util.h"
#include "log.h"
#include "macro.h"
@ -21,11 +22,13 @@
#include "missing_syscall.h"
#include "parse-util.h"
#include "process-util.h"
#include "rlimit-util.h"
#include "signal-util.h"
#include "stdio-util.h"
#include "string-util.h"
#include "terminal-util.h"
#include "tests.h"
#include "user-util.h"
#include "util.h"
#include "virt.h"
@ -601,6 +604,92 @@ static void test_ioprio_class_from_to_string(void) {
test_ioprio_class_from_to_string_one("-1", -1);
}
static void test_setpriority_closest(void) {
int r;
r = safe_fork("(test-setprio)", FORK_RESET_SIGNALS|FORK_CLOSE_ALL_FDS|FORK_DEATHSIG|FORK_WAIT|FORK_LOG, NULL);
assert_se(r >= 0);
if (r == 0) {
bool full_test;
int p, q;
/* child */
/* rlimit of 30 equals nice level of -10 */
if (setrlimit(RLIMIT_NICE, &RLIMIT_MAKE_CONST(30)) < 0) {
/* If this fails we are probably unprivielged or in a userns of some kind, let's skip
* the full test */
assert_se(ERRNO_IS_PRIVILEGE(errno));
full_test = false;
} else {
assert_se(setresgid(GID_NOBODY, GID_NOBODY, GID_NOBODY) >= 0);
assert_se(setresuid(UID_NOBODY, UID_NOBODY, UID_NOBODY) >= 0);
full_test = true;
}
errno = 0;
p = getpriority(PRIO_PROCESS, 0);
assert_se(errno == 0);
/* It should always be possible to set our nice level to the current one */
assert_se(setpriority_closest(p) > 0);
errno = 0;
q = getpriority(PRIO_PROCESS, 0);
assert_se(errno == 0 && p == q);
/* It should also be possible to to set the nice level to one higher */
if (p < PRIO_MAX-1) {
assert_se(setpriority_closest(++p) > 0);
errno = 0;
q = getpriority(PRIO_PROCESS, 0);
assert_se(errno == 0 && p == q);
}
/* It should also be possible to to set the nice level to two higher */
if (p < PRIO_MAX-1) {
assert_se(setpriority_closest(++p) > 0);
errno = 0;
q = getpriority(PRIO_PROCESS, 0);
assert_se(errno == 0 && p == q);
}
if (full_test) {
/* These two should work, given the RLIMIT_NICE we set above */
assert_se(setpriority_closest(-10) > 0);
errno = 0;
q = getpriority(PRIO_PROCESS, 0);
assert_se(errno == 0 && q == -10);
assert_se(setpriority_closest(-9) > 0);
errno = 0;
q = getpriority(PRIO_PROCESS, 0);
assert_se(errno == 0 && q == -9);
/* This should succeed but should be clamped to the limit */
assert_se(setpriority_closest(-11) == 0);
errno = 0;
q = getpriority(PRIO_PROCESS, 0);
assert_se(errno == 0 && q == -10);
assert_se(setpriority_closest(-8) > 0);
errno = 0;
q = getpriority(PRIO_PROCESS, 0);
assert_se(errno == 0 && q == -8);
/* This should succeed but should be clamped to the limit */
assert_se(setpriority_closest(-12) == 0);
errno = 0;
q = getpriority(PRIO_PROCESS, 0);
assert_se(errno == 0 && q == -10);
}
_exit(EXIT_SUCCESS);
}
}
int main(int argc, char *argv[]) {
test_setup_logging(LOG_DEBUG);
@ -627,6 +716,7 @@ int main(int argc, char *argv[]) {
test_safe_fork();
test_pid_to_ptr();
test_ioprio_class_from_to_string();
test_setpriority_closest();
return 0;
}