along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
+#include <sched.h>
+#include <sys/mount.h>
#include <sys/personality.h>
+#include <sys/prctl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
+#if HAVE_VALGRIND_VALGRIND_H
+#include <valgrind/valgrind.h>
+#endif
#include "alloc-util.h"
#include "architecture.h"
+#include "fd-util.h"
#include "log.h"
#include "macro.h"
#include "parse-util.h"
#include "stdio-util.h"
#include "string-util.h"
#include "terminal-util.h"
+#include "test-helper.h"
#include "util.h"
#include "virt.h"
static void test_get_process_comm(pid_t pid) {
struct stat st;
- _cleanup_free_ char *a = NULL, *c = NULL, *d = NULL, *f = NULL, *i = NULL, *cwd = NULL, *root = NULL;
+ _cleanup_free_ char *a = NULL, *c = NULL, *d = NULL, *f = NULL, *i = NULL;
_cleanup_free_ char *env = NULL;
char path[strlen("/proc//comm") + DECIMAL_STR_MAX(pid_t)];
pid_t e;
log_info("PID"PID_FMT" cmdline: '%s'", pid, c);
assert_se(get_process_cmdline(pid, 8, false, &d) >= 0);
- log_info("PID"PID_FMT" cmdline truncated: '%s'", pid, d);
+ log_info("PID"PID_FMT" cmdline truncated to 8: '%s'", pid, d);
+
+ free(d);
+ assert_se(get_process_cmdline(pid, 1, false, &d) >= 0);
+ log_info("PID"PID_FMT" cmdline truncated to 1: '%s'", pid, d);
assert_se(get_process_ppid(pid, &e) >= 0);
log_info("PID"PID_FMT" PPID: "PID_FMT, pid, e);
waitpid(pid, &status, 0);
assert_se(!pid_is_unwaited(pid));
}
- assert_se(pid_is_unwaited(getpid()));
+ assert_se(pid_is_unwaited(getpid_cached()));
assert_se(!pid_is_unwaited(-1));
}
waitpid(pid, &status, 0);
assert_se(!pid_is_alive(pid));
}
- assert_se(pid_is_alive(getpid()));
+ assert_se(pid_is_alive(getpid_cached()));
assert_se(!pid_is_alive(-1));
}
#endif
}
+static void test_get_process_cmdline_harder(void) {
+ char path[] = "/tmp/test-cmdlineXXXXXX";
+ _cleanup_close_ int fd = -1;
+ _cleanup_free_ char *line = NULL;
+ pid_t pid;
+
+ if (geteuid() != 0)
+ return;
+
+#if HAVE_VALGRIND_VALGRIND_H
+ /* valgrind patches open(/proc//cmdline)
+ * so, test_get_process_cmdline_harder fails always
+ * See https://github.com/systemd/systemd/pull/3555#issuecomment-226564908 */
+ if (RUNNING_ON_VALGRIND)
+ return;
+#endif
+
+ pid = fork();
+ if (pid > 0) {
+ siginfo_t si;
+
+ (void) wait_for_terminate(pid, &si);
+
+ assert_se(si.si_code == CLD_EXITED);
+ assert_se(si.si_status == 0);
+
+ return;
+ }
+
+ assert_se(pid == 0);
+ assert_se(unshare(CLONE_NEWNS) >= 0);
+
+ fd = mkostemp(path, O_CLOEXEC);
+ assert_se(fd >= 0);
+
+ if (mount(path, "/proc/self/cmdline", "bind", MS_BIND, NULL) < 0) {
+ /* This happens under selinux… Abort the test in this case. */
+ log_warning_errno(errno, "mount(..., \"/proc/self/cmdline\", \"bind\", ...) failed: %m");
+ assert(errno == EACCES);
+ return;
+ }
+
+ assert_se(unlink(path) >= 0);
+
+ assert_se(prctl(PR_SET_NAME, "testa") >= 0);
+
+ assert_se(get_process_cmdline(getpid_cached(), 0, false, &line) == -ENOENT);
+
+ assert_se(get_process_cmdline(getpid_cached(), 0, true, &line) >= 0);
+ assert_se(streq(line, "[testa]"));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid_cached(), 1, true, &line) >= 0);
+ assert_se(streq(line, ""));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid_cached(), 2, true, &line) >= 0);
+ assert_se(streq(line, "["));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid_cached(), 3, true, &line) >= 0);
+ assert_se(streq(line, "[."));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid_cached(), 4, true, &line) >= 0);
+ assert_se(streq(line, "[.."));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid_cached(), 5, true, &line) >= 0);
+ assert_se(streq(line, "[..."));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid_cached(), 6, true, &line) >= 0);
+ assert_se(streq(line, "[...]"));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid_cached(), 7, true, &line) >= 0);
+ assert_se(streq(line, "[t...]"));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid_cached(), 8, true, &line) >= 0);
+ assert_se(streq(line, "[testa]"));
+ line = mfree(line);
+
+ assert_se(write(fd, "\0\0\0\0\0\0\0\0\0", 10) == 10);
+
+ assert_se(get_process_cmdline(getpid_cached(), 0, false, &line) == -ENOENT);
+
+ assert_se(get_process_cmdline(getpid_cached(), 0, true, &line) >= 0);
+ assert_se(streq(line, "[testa]"));
+ line = mfree(line);
+
+ assert_se(write(fd, "foo\0bar\0\0\0\0\0", 10) == 10);
+
+ assert_se(get_process_cmdline(getpid_cached(), 0, false, &line) >= 0);
+ assert_se(streq(line, "foo bar"));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid_cached(), 0, true, &line) >= 0);
+ assert_se(streq(line, "foo bar"));
+ line = mfree(line);
+
+ assert_se(write(fd, "quux", 4) == 4);
+ assert_se(get_process_cmdline(getpid_cached(), 0, false, &line) >= 0);
+ assert_se(streq(line, "foo bar quux"));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid_cached(), 0, true, &line) >= 0);
+ assert_se(streq(line, "foo bar quux"));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid_cached(), 1, true, &line) >= 0);
+ assert_se(streq(line, ""));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid_cached(), 2, true, &line) >= 0);
+ assert_se(streq(line, "."));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid_cached(), 3, true, &line) >= 0);
+ assert_se(streq(line, ".."));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid_cached(), 4, true, &line) >= 0);
+ assert_se(streq(line, "..."));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid_cached(), 5, true, &line) >= 0);
+ assert_se(streq(line, "f..."));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid_cached(), 6, true, &line) >= 0);
+ assert_se(streq(line, "fo..."));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid_cached(), 7, true, &line) >= 0);
+ assert_se(streq(line, "foo..."));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid_cached(), 8, true, &line) >= 0);
+ assert_se(streq(line, "foo..."));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid_cached(), 9, true, &line) >= 0);
+ assert_se(streq(line, "foo b..."));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid_cached(), 10, true, &line) >= 0);
+ assert_se(streq(line, "foo ba..."));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid_cached(), 11, true, &line) >= 0);
+ assert_se(streq(line, "foo bar..."));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid_cached(), 12, true, &line) >= 0);
+ assert_se(streq(line, "foo bar..."));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid_cached(), 13, true, &line) >= 0);
+ assert_se(streq(line, "foo bar quux"));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid_cached(), 14, true, &line) >= 0);
+ assert_se(streq(line, "foo bar quux"));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid_cached(), 1000, true, &line) >= 0);
+ assert_se(streq(line, "foo bar quux"));
+ line = mfree(line);
+
+ assert_se(ftruncate(fd, 0) >= 0);
+ assert_se(prctl(PR_SET_NAME, "aaaa bbbb cccc") >= 0);
+
+ assert_se(get_process_cmdline(getpid_cached(), 0, false, &line) == -ENOENT);
+
+ assert_se(get_process_cmdline(getpid_cached(), 0, true, &line) >= 0);
+ assert_se(streq(line, "[aaaa bbbb cccc]"));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid_cached(), 10, true, &line) >= 0);
+ assert_se(streq(line, "[aaaa...]"));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid_cached(), 11, true, &line) >= 0);
+ assert_se(streq(line, "[aaaa...]"));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid_cached(), 12, true, &line) >= 0);
+ assert_se(streq(line, "[aaaa b...]"));
+ line = mfree(line);
+
+ safe_close(fd);
+ _exit(0);
+}
+
+static void test_rename_process_now(const char *p, int ret) {
+ _cleanup_free_ char *comm = NULL, *cmdline = NULL;
+ int r;
+
+ r = rename_process(p);
+ assert_se(r == ret ||
+ (ret == 0 && r >= 0) ||
+ (ret > 0 && r > 0));
+
+ if (r < 0)
+ return;
+
+#if HAVE_VALGRIND_VALGRIND_H
+ /* see above, valgrind is weird, we can't verify what we are doing here */
+ if (RUNNING_ON_VALGRIND)
+ return;
+#endif
+
+ assert_se(get_process_comm(0, &comm) >= 0);
+ log_info("comm = <%s>", comm);
+ assert_se(strneq(comm, p, 15));
+
+ assert_se(get_process_cmdline(0, 0, false, &cmdline) >= 0);
+ /* we cannot expect cmdline to be renamed properly without privileges */
+ if (geteuid() == 0) {
+ log_info("cmdline = <%s>", cmdline);
+ assert_se(strneq(p, cmdline, strlen("test-process-util")));
+ assert_se(startswith(p, cmdline));
+ } else
+ log_info("cmdline = <%s> (not verified)", cmdline);
+}
+
+static void test_rename_process_one(const char *p, int ret) {
+ siginfo_t si;
+ pid_t pid;
+
+ pid = fork();
+ assert_se(pid >= 0);
+
+ if (pid == 0) {
+ /* child */
+ test_rename_process_now(p, ret);
+ _exit(EXIT_SUCCESS);
+ }
+
+ assert_se(wait_for_terminate(pid, &si) >= 0);
+ assert_se(si.si_code == CLD_EXITED);
+ assert_se(si.si_status == EXIT_SUCCESS);
+}
+
+static void test_rename_process_multi(void) {
+ pid_t pid;
+
+ pid = fork();
+ assert_se(pid >= 0);
+
+ if (pid > 0) {
+ siginfo_t si;
+
+ assert_se(wait_for_terminate(pid, &si) >= 0);
+ assert_se(si.si_code == CLD_EXITED);
+ assert_se(si.si_status == EXIT_SUCCESS);
+
+ return;
+ }
+
+ /* child */
+ test_rename_process_now("one", 1);
+ test_rename_process_now("more", 0); /* longer than "one", hence truncated */
+ setresuid(99, 99, 99);
+ test_rename_process_now("time!", 0);
+ test_rename_process_now("0", 1); /* shorter than "one", should fit */
+ test_rename_process_one("", -EINVAL);
+ test_rename_process_one(NULL, -EINVAL);
+ _exit(EXIT_SUCCESS);
+}
+
+static void test_rename_process(void) {
+ test_rename_process_one(NULL, -EINVAL);
+ test_rename_process_one("", -EINVAL);
+ test_rename_process_one("foo", 1); /* should always fit */
+ test_rename_process_one("this is a really really long process name, followed by some more words", 0); /* unlikely to fit */
+ test_rename_process_one("1234567", 1); /* should always fit */
+ test_rename_process_multi(); /* multiple invocations and dropped privileges */
+}
+
+static void test_getpid_cached(void) {
+ siginfo_t si;
+ pid_t a, b, c, d, e, f, child;
+
+ a = raw_getpid();
+ b = getpid_cached();
+ c = getpid();
+
+ assert_se(a == b && a == c);
+
+ child = fork();
+ assert_se(child >= 0);
+
+ if (child == 0) {
+ /* In child */
+ a = raw_getpid();
+ b = getpid_cached();
+ c = getpid();
+
+ assert_se(a == b && a == c);
+ _exit(0);
+ }
+
+ d = raw_getpid();
+ e = getpid_cached();
+ f = getpid();
+
+ assert_se(a == d && a == e && a == f);
+
+ assert_se(wait_for_terminate(child, &si) >= 0);
+ assert_se(si.si_status == 0);
+ assert_se(si.si_code == CLD_EXITED);
+}
+
+#define MEASURE_ITERATIONS (10000000LLU)
+
+static void test_getpid_measure(void) {
+ unsigned long long i;
+ usec_t t, q;
+
+ t = now(CLOCK_MONOTONIC);
+ for (i = 0; i < MEASURE_ITERATIONS; i++)
+ (void) getpid();
+ q = now(CLOCK_MONOTONIC) - t;
+
+ log_info(" glibc getpid(): %llu/s\n", (unsigned long long) (MEASURE_ITERATIONS*USEC_PER_SEC/q));
+
+ t = now(CLOCK_MONOTONIC);
+ for (i = 0; i < MEASURE_ITERATIONS; i++)
+ (void) getpid_cached();
+ q = now(CLOCK_MONOTONIC) - t;
+
+ log_info("getpid_cached(): %llu/s\n", (unsigned long long) (MEASURE_ITERATIONS*USEC_PER_SEC/q));
+}
+
int main(int argc, char *argv[]) {
+
+ log_set_max_level(LOG_DEBUG);
log_parse_environment();
log_open();
+ saved_argc = argc;
+ saved_argv = argv;
+
if (argc > 1) {
pid_t pid = 0;
(void) parse_pid(argv[1], &pid);
test_get_process_comm(pid);
} else {
- test_get_process_comm(1);
+ TEST_REQ_RUNNING_SYSTEMD(test_get_process_comm(1));
test_get_process_comm(getpid());
}
test_pid_is_unwaited();
test_pid_is_alive();
test_personality();
+ test_get_process_cmdline_harder();
+ test_rename_process();
+ test_getpid_cached();
+ test_getpid_measure();
return 0;
}
projects / thirdparty / systemd.git / blobdiff