From 19f4f86bfed21c5326ed2acebe1163f3a83e832b Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 04:25:50 +0200 Subject: Adding upstream version 241. Signed-off-by: Daniel Baumann --- src/test/test-process-util.c | 632 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 632 insertions(+) create mode 100644 src/test/test-process-util.c (limited to 'src/test/test-process-util.c') diff --git a/src/test/test-process-util.c b/src/test/test-process-util.c new file mode 100644 index 0000000..b5ba651 --- /dev/null +++ b/src/test/test-process-util.c @@ -0,0 +1,632 @@ +/* SPDX-License-Identifier: LGPL-2.1+ */ + +#include +#include +#include +#include +#include +#include +#include +#include +#if HAVE_VALGRIND_VALGRIND_H +#include +#endif + +#include "alloc-util.h" +#include "architecture.h" +#include "fd-util.h" +#include "log.h" +#include "macro.h" +#include "missing.h" +#include "parse-util.h" +#include "process-util.h" +#include "signal-util.h" +#include "stdio-util.h" +#include "string-util.h" +#include "terminal-util.h" +#include "test-helper.h" +#include "tests.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; + _cleanup_free_ char *env = NULL; + char path[STRLEN("/proc//comm") + DECIMAL_STR_MAX(pid_t)]; + pid_t e; + uid_t u; + gid_t g; + dev_t h; + int r; + + xsprintf(path, "/proc/"PID_FMT"/comm", pid); + + if (stat(path, &st) == 0) { + assert_se(get_process_comm(pid, &a) >= 0); + log_info("PID"PID_FMT" comm: '%s'", pid, a); + } else + log_warning("%s not exist.", path); + + assert_se(get_process_cmdline(pid, 0, true, &c) >= 0); + 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 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); + assert_se(pid == 1 ? e == 0 : e > 0); + + assert_se(is_kernel_thread(pid) == 0 || pid != 1); + + r = get_process_exe(pid, &f); + assert_se(r >= 0 || r == -EACCES); + log_info("PID"PID_FMT" exe: '%s'", pid, strna(f)); + + assert_se(get_process_uid(pid, &u) == 0); + log_info("PID"PID_FMT" UID: "UID_FMT, pid, u); + + assert_se(get_process_gid(pid, &g) == 0); + log_info("PID"PID_FMT" GID: "GID_FMT, pid, g); + + r = get_process_environ(pid, &env); + assert_se(r >= 0 || r == -EACCES); + log_info("PID"PID_FMT" strlen(environ): %zi", pid, env ? (ssize_t)strlen(env) : (ssize_t)-errno); + + if (!detect_container()) + assert_se(get_ctty_devnr(pid, &h) == -ENXIO || pid != 1); + + (void) getenv_for_pid(pid, "PATH", &i); + log_info("PID"PID_FMT" $PATH: '%s'", pid, strna(i)); +} + +static void test_get_process_comm_escape_one(const char *input, const char *output) { + _cleanup_free_ char *n = NULL; + + log_info("input: <%s> — output: <%s>", input, output); + + assert_se(prctl(PR_SET_NAME, input) >= 0); + assert_se(get_process_comm(0, &n) >= 0); + + log_info("got: <%s>", n); + + assert_se(streq_ptr(n, output)); +} + +static void test_get_process_comm_escape(void) { + _cleanup_free_ char *saved = NULL; + + assert_se(get_process_comm(0, &saved) >= 0); + + test_get_process_comm_escape_one("", ""); + test_get_process_comm_escape_one("foo", "foo"); + test_get_process_comm_escape_one("012345678901234", "012345678901234"); + test_get_process_comm_escape_one("0123456789012345", "012345678901234"); + test_get_process_comm_escape_one("äöüß", "\\303\\244\\303…"); + test_get_process_comm_escape_one("xäöüß", "x\\303\\244…"); + test_get_process_comm_escape_one("xxäöüß", "xx\\303\\244…"); + test_get_process_comm_escape_one("xxxäöüß", "xxx\\303\\244…"); + test_get_process_comm_escape_one("xxxxäöüß", "xxxx\\303\\244…"); + test_get_process_comm_escape_one("xxxxxäöüß", "xxxxx\\303…"); + + assert_se(prctl(PR_SET_NAME, saved) >= 0); +} + +static void test_pid_is_unwaited(void) { + pid_t pid; + + pid = fork(); + assert_se(pid >= 0); + if (pid == 0) { + _exit(EXIT_SUCCESS); + } else { + int status; + + waitpid(pid, &status, 0); + assert_se(!pid_is_unwaited(pid)); + } + assert_se(pid_is_unwaited(getpid_cached())); + assert_se(!pid_is_unwaited(-1)); +} + +static void test_pid_is_alive(void) { + pid_t pid; + + pid = fork(); + assert_se(pid >= 0); + if (pid == 0) { + _exit(EXIT_SUCCESS); + } else { + int status; + + waitpid(pid, &status, 0); + assert_se(!pid_is_alive(pid)); + } + assert_se(pid_is_alive(getpid_cached())); + assert_se(!pid_is_alive(-1)); +} + +static void test_personality(void) { + + assert_se(personality_to_string(PER_LINUX)); + assert_se(!personality_to_string(PERSONALITY_INVALID)); + + assert_se(streq(personality_to_string(PER_LINUX), architecture_to_string(native_architecture()))); + + assert_se(personality_from_string(personality_to_string(PER_LINUX)) == PER_LINUX); + assert_se(personality_from_string(architecture_to_string(native_architecture())) == PER_LINUX); + +#ifdef __x86_64__ + assert_se(streq_ptr(personality_to_string(PER_LINUX), "x86-64")); + assert_se(streq_ptr(personality_to_string(PER_LINUX32), "x86")); + + assert_se(personality_from_string("x86-64") == PER_LINUX); + assert_se(personality_from_string("x86") == PER_LINUX32); + assert_se(personality_from_string("ia64") == PERSONALITY_INVALID); + assert_se(personality_from_string(NULL) == PERSONALITY_INVALID); + + assert_se(personality_from_string(personality_to_string(PER_LINUX32)) == PER_LINUX32); +#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) { + log_info("Skipping %s: not root", __func__); + return; + } + + if (!have_namespaces()) { + log_notice("Testing without namespaces, skipping %s", __func__); + 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) { + log_info("Skipping %s: running on valgrind", __func__); + 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); + + if (mount(NULL, "/", NULL, MS_SLAVE|MS_REC, NULL) < 0) { + log_warning_errno(errno, "mount(..., \"/\", MS_SLAVE|MS_REC, ...) failed: %m"); + assert_se(IN_SET(errno, EPERM, EACCES)); + return; + } + + fd = mkostemp(path, O_CLOEXEC); + assert_se(fd >= 0); + + /* Note that we don't unmount the following bind-mount at the end of the test because the kernel + * will clear up its /proc/PID/ hierarchy automatically as soon as the test stops. */ + 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_se(IN_SET(errno, EPERM, 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(EXIT_SUCCESS); +} + +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, TASK_COMM_LEN-1)); + + r = get_process_cmdline(0, 0, false, &cmdline); + assert_se(r >= 0); + /* we cannot expect cmdline to be renamed properly without privileges */ + if (geteuid() == 0) { + if (r == 0 && detect_container() > 0) + log_info("cmdline = <%s> (not verified, Running in unprivileged container?)", cmdline); + else { + 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 */ + (void) setresuid(99, 99, 99); /* change uid when running privileged */ + 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(EXIT_SUCCESS); + } + + 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)); +} + +static void test_safe_fork(void) { + siginfo_t status; + pid_t pid; + int r; + + BLOCK_SIGNALS(SIGCHLD); + + r = safe_fork("(test-child)", FORK_RESET_SIGNALS|FORK_CLOSE_ALL_FDS|FORK_DEATHSIG|FORK_NULL_STDIO|FORK_REOPEN_LOG, &pid); + assert_se(r >= 0); + + if (r == 0) { + /* child */ + usleep(100 * USEC_PER_MSEC); + + _exit(88); + } + + assert_se(wait_for_terminate(pid, &status) >= 0); + assert_se(status.si_code == CLD_EXITED); + assert_se(status.si_status == 88); +} + +static void test_pid_to_ptr(void) { + + assert_se(PTR_TO_PID(NULL) == 0); + assert_se(PID_TO_PTR(0) == NULL); + + assert_se(PTR_TO_PID(PID_TO_PTR(1)) == 1); + assert_se(PTR_TO_PID(PID_TO_PTR(2)) == 2); + assert_se(PTR_TO_PID(PID_TO_PTR(-1)) == -1); + assert_se(PTR_TO_PID(PID_TO_PTR(-2)) == -2); + + assert_se(PTR_TO_PID(PID_TO_PTR(INT16_MAX)) == INT16_MAX); + assert_se(PTR_TO_PID(PID_TO_PTR(INT16_MIN)) == INT16_MIN); + +#if SIZEOF_PID_T >= 4 + assert_se(PTR_TO_PID(PID_TO_PTR(INT32_MAX)) == INT32_MAX); + assert_se(PTR_TO_PID(PID_TO_PTR(INT32_MIN)) == INT32_MIN); +#endif +} + +static void test_ioprio_class_from_to_string_one(const char *val, int expected) { + assert_se(ioprio_class_from_string(val) == expected); + if (expected >= 0) { + _cleanup_free_ char *s = NULL; + unsigned ret; + + assert_se(ioprio_class_to_string_alloc(expected, &s) == 0); + /* We sometimes get a class number and sometimes a number back */ + assert_se(streq(s, val) || + safe_atou(val, &ret) == 0); + } +} + +static void test_ioprio_class_from_to_string(void) { + test_ioprio_class_from_to_string_one("none", IOPRIO_CLASS_NONE); + test_ioprio_class_from_to_string_one("realtime", IOPRIO_CLASS_RT); + test_ioprio_class_from_to_string_one("best-effort", IOPRIO_CLASS_BE); + test_ioprio_class_from_to_string_one("idle", IOPRIO_CLASS_IDLE); + test_ioprio_class_from_to_string_one("0", 0); + test_ioprio_class_from_to_string_one("1", 1); + test_ioprio_class_from_to_string_one("7", 7); + test_ioprio_class_from_to_string_one("8", 8); + test_ioprio_class_from_to_string_one("9", -1); + test_ioprio_class_from_to_string_one("-1", -1); +} + +int main(int argc, char *argv[]) { + test_setup_logging(LOG_DEBUG); + + 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_REQ_RUNNING_SYSTEMD(test_get_process_comm(1)); + test_get_process_comm(getpid()); + } + + test_get_process_comm_escape(); + test_pid_is_unwaited(); + test_pid_is_alive(); + test_personality(); + test_get_process_cmdline_harder(); + test_rename_process(); + test_getpid_cached(); + test_getpid_measure(); + test_safe_fork(); + test_pid_to_ptr(); + test_ioprio_class_from_to_string(); + + return 0; +} -- cgit v1.2.3