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Diffstat (limited to 'src/test/test-process-util.c')
| -rw-r--r-- | src/test/test-process-util.c | 954 |
1 files changed, 954 insertions, 0 deletions
diff --git a/src/test/test-process-util.c b/src/test/test-process-util.c new file mode 100644 index 0000000..957e214 --- /dev/null +++ b/src/test/test-process-util.c @@ -0,0 +1,954 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ + +#include <fcntl.h> +#include <linux/oom.h> +#include <pthread.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 "dirent-util.h" +#include "errno-list.h" +#include "errno-util.h" +#include "fd-util.h" +#include "ioprio-util.h" +#include "log.h" +#include "macro.h" +#include "missing_sched.h" +#include "missing_syscall.h" +#include "namespace-util.h" +#include "parse-util.h" +#include "process-util.h" +#include "procfs-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 "virt.h" + +static void test_pid_get_comm_one(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; + + log_info("/* %s */", __func__); + + xsprintf(path, "/proc/"PID_FMT"/comm", pid); + + if (stat(path, &st) == 0) { + assert_se(pid_get_comm(pid, &a) >= 0); + log_info("PID"PID_FMT" comm: '%s'", pid, a); + } else + log_warning("%s not exist.", path); + + assert_se(pid_get_cmdline(pid, 0, PROCESS_CMDLINE_COMM_FALLBACK, &c) >= 0); + log_info("PID"PID_FMT" cmdline: '%s'", pid, c); + + assert_se(pid_get_cmdline(pid, 8, 0, &d) >= 0); + log_info("PID"PID_FMT" cmdline truncated to 8: '%s'", pid, d); + + free(d); + assert_se(pid_get_cmdline(pid, 1, 0, &d) >= 0); + log_info("PID"PID_FMT" cmdline truncated to 1: '%s'", pid, d); + + r = get_process_ppid(pid, &e); + assert_se(pid == 1 ? r == -EADDRNOTAVAIL : r >= 0); + if (r >= 0) { + log_info("PID"PID_FMT" PPID: "PID_FMT, pid, e); + assert_se(e > 0); + } + + assert_se(pid_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(pid_get_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)); +} + +TEST(pid_get_comm) { + if (saved_argc > 1) { + pid_t pid = 0; + + (void) parse_pid(saved_argv[1], &pid); + test_pid_get_comm_one(pid); + } else { + TEST_REQ_RUNNING_SYSTEMD(test_pid_get_comm_one(1)); + test_pid_get_comm_one(getpid()); + } +} + +static void test_pid_get_cmdline_one(pid_t pid) { + _cleanup_free_ char *c = NULL, *d = NULL, *e = NULL, *f = NULL, *g = NULL, *h = NULL, *joined = NULL; + _cleanup_strv_free_ char **strv_a = NULL, **strv_b = NULL; + int r; + + r = pid_get_cmdline(pid, SIZE_MAX, 0, &c); + log_info("PID "PID_FMT": %s", pid, r >= 0 ? c : errno_to_name(r)); + + r = pid_get_cmdline(pid, SIZE_MAX, PROCESS_CMDLINE_COMM_FALLBACK, &d); + log_info(" %s", r >= 0 ? d : errno_to_name(r)); + + r = pid_get_cmdline(pid, SIZE_MAX, PROCESS_CMDLINE_QUOTE, &e); + log_info(" %s", r >= 0 ? e : errno_to_name(r)); + + r = pid_get_cmdline(pid, SIZE_MAX, PROCESS_CMDLINE_QUOTE | PROCESS_CMDLINE_COMM_FALLBACK, &f); + log_info(" %s", r >= 0 ? f : errno_to_name(r)); + + r = pid_get_cmdline(pid, SIZE_MAX, PROCESS_CMDLINE_QUOTE_POSIX, &g); + log_info(" %s", r >= 0 ? g : errno_to_name(r)); + + r = pid_get_cmdline(pid, SIZE_MAX, PROCESS_CMDLINE_QUOTE_POSIX | PROCESS_CMDLINE_COMM_FALLBACK, &h); + log_info(" %s", r >= 0 ? h : errno_to_name(r)); + + r = pid_get_cmdline_strv(pid, 0, &strv_a); + if (r >= 0) + assert_se(joined = strv_join(strv_a, "\", \"")); + log_info(" \"%s\"", r >= 0 ? joined : errno_to_name(r)); + + joined = mfree(joined); + + r = pid_get_cmdline_strv(pid, PROCESS_CMDLINE_COMM_FALLBACK, &strv_b); + if (r >= 0) + assert_se(joined = strv_join(strv_b, "\", \"")); + log_info(" \"%s\"", r >= 0 ? joined : errno_to_name(r)); +} + +TEST(pid_get_cmdline) { + _cleanup_closedir_ DIR *d = NULL; + int r; + + assert_se(proc_dir_open(&d) >= 0); + + for (;;) { + pid_t pid; + + r = proc_dir_read(d, &pid); + assert_se(r >= 0); + + if (r == 0) /* EOF */ + break; + + test_pid_get_cmdline_one(pid); + } +} + +static void test_pid_get_comm_escape_one(const char *input, const char *output) { + _cleanup_free_ char *n = NULL; + + log_debug("input: <%s> — output: <%s>", input, output); + + assert_se(prctl(PR_SET_NAME, input) >= 0); + assert_se(pid_get_comm(0, &n) >= 0); + + log_debug("got: <%s>", n); + + assert_se(streq_ptr(n, output)); +} + +TEST(pid_get_comm_escape) { + _cleanup_free_ char *saved = NULL; + + assert_se(pid_get_comm(0, &saved) >= 0); + + test_pid_get_comm_escape_one("", ""); + test_pid_get_comm_escape_one("foo", "foo"); + test_pid_get_comm_escape_one("012345678901234", "012345678901234"); + test_pid_get_comm_escape_one("0123456789012345", "012345678901234"); + test_pid_get_comm_escape_one("äöüß", "\\303\\244\\303\\266\\303\\274\\303\\237"); + test_pid_get_comm_escape_one("xäöüß", "x\\303\\244\\303\\266\\303\\274\\303\\237"); + test_pid_get_comm_escape_one("xxäöüß", "xx\\303\\244\\303\\266\\303\\274\\303\\237"); + test_pid_get_comm_escape_one("xxxäöüß", "xxx\\303\\244\\303\\266\\303\\274\\303\\237"); + test_pid_get_comm_escape_one("xxxxäöüß", "xxxx\\303\\244\\303\\266\\303\\274\\303\\237"); + test_pid_get_comm_escape_one("xxxxxäöüß", "xxxxx\\303\\244\\303\\266\\303\\274\\303\\237"); + + assert_se(prctl(PR_SET_NAME, saved) >= 0); +} + +TEST(pid_is_unwaited) { + pid_t pid; + + pid = fork(); + assert_se(pid >= 0); + if (pid == 0) { + _exit(EXIT_SUCCESS); + } else { + int status; + + assert_se(waitpid(pid, &status, 0) == pid); + assert_se(pid_is_unwaited(pid) == 0); + } + assert_se(pid_is_unwaited(getpid_cached()) > 0); + assert_se(pid_is_unwaited(-1) < 0); +} + +TEST(pid_is_alive) { + pid_t pid; + + pid = fork(); + assert_se(pid >= 0); + if (pid == 0) { + _exit(EXIT_SUCCESS); + } else { + int status; + + assert_se(waitpid(pid, &status, 0) == pid); + assert_se(pid_is_alive(pid) == 0); + } + assert_se(pid_is_alive(getpid_cached()) > 0); + assert_se(pid_is_alive(-1) < 0); +} + +TEST(personality) { + 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 +} + +TEST(pid_get_cmdline_harder) { + char path[] = "/tmp/test-cmdlineXXXXXX"; + _cleanup_close_ int fd = -EBADF; + _cleanup_free_ char *line = NULL; + _cleanup_strv_free_ char **args = NULL; + pid_t pid; + int r; + + 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_pid_get_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); + + r = detach_mount_namespace(); + if (r < 0) { + log_warning_errno(r, "detach mount namespace failed: %m"); + assert_se(ERRNO_IS_PRIVILEGE(r)); + 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; + } + + /* Set RLIMIT_STACK to infinity to test we don't try to allocate unnecessarily large values to read + * the cmdline. */ + if (setrlimit(RLIMIT_STACK, &RLIMIT_MAKE_CONST(RLIM_INFINITY)) < 0) + log_warning("Testing without RLIMIT_STACK=infinity"); + + assert_se(unlink(path) >= 0); + + assert_se(prctl(PR_SET_NAME, "testa") >= 0); + + assert_se(pid_get_cmdline(0, SIZE_MAX, 0, &line) == -ENOENT); + + assert_se(pid_get_cmdline(0, SIZE_MAX, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + log_debug("'%s'", line); + assert_se(streq(line, "[testa]")); + line = mfree(line); + + assert_se(pid_get_cmdline(0, SIZE_MAX, PROCESS_CMDLINE_COMM_FALLBACK | PROCESS_CMDLINE_QUOTE, &line) >= 0); + log_debug("'%s'", line); + assert_se(streq(line, "\"[testa]\"")); /* quoting is enabled here */ + line = mfree(line); + + assert_se(pid_get_cmdline(0, 0, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + log_debug("'%s'", line); + assert_se(streq(line, "")); + line = mfree(line); + + assert_se(pid_get_cmdline(0, 1, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + assert_se(streq(line, "…")); + line = mfree(line); + + assert_se(pid_get_cmdline(0, 2, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + assert_se(streq(line, "[…")); + line = mfree(line); + + assert_se(pid_get_cmdline(0, 3, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + assert_se(streq(line, "[t…")); + line = mfree(line); + + assert_se(pid_get_cmdline(0, 4, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + assert_se(streq(line, "[te…")); + line = mfree(line); + + assert_se(pid_get_cmdline(0, 5, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + assert_se(streq(line, "[tes…")); + line = mfree(line); + + assert_se(pid_get_cmdline(0, 6, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + assert_se(streq(line, "[test…")); + line = mfree(line); + + assert_se(pid_get_cmdline(0, 7, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + assert_se(streq(line, "[testa]")); + line = mfree(line); + + assert_se(pid_get_cmdline(0, 8, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + assert_se(streq(line, "[testa]")); + line = mfree(line); + + assert_se(pid_get_cmdline_strv(0, PROCESS_CMDLINE_COMM_FALLBACK, &args) >= 0); + assert_se(strv_equal(args, STRV_MAKE("[testa]"))); + args = strv_free(args); + + /* Test with multiple arguments that don't require quoting */ + + assert_se(write(fd, "foo\0bar", 8) == 8); + + assert_se(pid_get_cmdline(0, SIZE_MAX, 0, &line) >= 0); + log_debug("'%s'", line); + assert_se(streq(line, "foo bar")); + line = mfree(line); + + assert_se(pid_get_cmdline(0, SIZE_MAX, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + assert_se(streq(line, "foo bar")); + line = mfree(line); + + assert_se(pid_get_cmdline_strv(0, PROCESS_CMDLINE_COMM_FALLBACK, &args) >= 0); + assert_se(strv_equal(args, STRV_MAKE("foo", "bar"))); + args = strv_free(args); + + assert_se(write(fd, "quux", 4) == 4); + assert_se(pid_get_cmdline(0, SIZE_MAX, 0, &line) >= 0); + log_debug("'%s'", line); + assert_se(streq(line, "foo bar quux")); + line = mfree(line); + + assert_se(pid_get_cmdline(0, SIZE_MAX, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + log_debug("'%s'", line); + assert_se(streq(line, "foo bar quux")); + line = mfree(line); + + assert_se(pid_get_cmdline(0, 1, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + log_debug("'%s'", line); + assert_se(streq(line, "…")); + line = mfree(line); + + assert_se(pid_get_cmdline(0, 2, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + log_debug("'%s'", line); + assert_se(streq(line, "f…")); + line = mfree(line); + + assert_se(pid_get_cmdline(0, 3, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + log_debug("'%s'", line); + assert_se(streq(line, "fo…")); + line = mfree(line); + + assert_se(pid_get_cmdline(0, 4, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + log_debug("'%s'", line); + assert_se(streq(line, "foo…")); + line = mfree(line); + + assert_se(pid_get_cmdline(0, 5, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + log_debug("'%s'", line); + assert_se(streq(line, "foo …")); + line = mfree(line); + + assert_se(pid_get_cmdline(0, 6, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + log_debug("'%s'", line); + assert_se(streq(line, "foo b…")); + line = mfree(line); + + assert_se(pid_get_cmdline(0, 7, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + log_debug("'%s'", line); + assert_se(streq(line, "foo ba…")); + line = mfree(line); + + assert_se(pid_get_cmdline(0, 8, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + log_debug("'%s'", line); + assert_se(streq(line, "foo bar…")); + line = mfree(line); + + assert_se(pid_get_cmdline(0, 9, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + log_debug("'%s'", line); + assert_se(streq(line, "foo bar …")); + line = mfree(line); + + assert_se(pid_get_cmdline(0, 10, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + log_debug("'%s'", line); + assert_se(streq(line, "foo bar q…")); + line = mfree(line); + + assert_se(pid_get_cmdline(0, 11, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + log_debug("'%s'", line); + assert_se(streq(line, "foo bar qu…")); + line = mfree(line); + + assert_se(pid_get_cmdline(0, 12, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + log_debug("'%s'", line); + assert_se(streq(line, "foo bar quux")); + line = mfree(line); + + assert_se(pid_get_cmdline(0, 13, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + log_debug("'%s'", line); + assert_se(streq(line, "foo bar quux")); + line = mfree(line); + + assert_se(pid_get_cmdline(0, 14, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + log_debug("'%s'", line); + assert_se(streq(line, "foo bar quux")); + line = mfree(line); + + assert_se(pid_get_cmdline(0, 1000, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + log_debug("'%s'", line); + assert_se(streq(line, "foo bar quux")); + line = mfree(line); + + assert_se(pid_get_cmdline_strv(0, PROCESS_CMDLINE_COMM_FALLBACK, &args) >= 0); + assert_se(strv_equal(args, STRV_MAKE("foo", "bar", "quux"))); + args = strv_free(args); + + assert_se(ftruncate(fd, 0) >= 0); + assert_se(prctl(PR_SET_NAME, "aaaa bbbb cccc") >= 0); + + assert_se(pid_get_cmdline(0, SIZE_MAX, 0, &line) == -ENOENT); + + assert_se(pid_get_cmdline(0, SIZE_MAX, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + log_debug("'%s'", line); + assert_se(streq(line, "[aaaa bbbb cccc]")); + line = mfree(line); + + assert_se(pid_get_cmdline(0, 10, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + log_debug("'%s'", line); + assert_se(streq(line, "[aaaa bbb…")); + line = mfree(line); + + assert_se(pid_get_cmdline(0, 11, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + log_debug("'%s'", line); + assert_se(streq(line, "[aaaa bbbb…")); + line = mfree(line); + + assert_se(pid_get_cmdline(0, 12, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + log_debug("'%s'", line); + assert_se(streq(line, "[aaaa bbbb …")); + line = mfree(line); + + assert_se(pid_get_cmdline_strv(0, PROCESS_CMDLINE_COMM_FALLBACK, &args) >= 0); + assert_se(strv_equal(args, STRV_MAKE("[aaaa bbbb cccc]"))); + args = strv_free(args); + + /* Test with multiple arguments that do require quoting */ + +#define CMDLINE1 "foo\0'bar'\0\"bar$\"\0x y z\0!``\0" +#define EXPECT1 "foo \"'bar'\" \"\\\"bar\\$\\\"\" \"x y z\" \"!\\`\\`\"" +#define EXPECT1p "foo $'\\'bar\\'' $'\"bar$\"' $'x y z' $'!``'" +#define EXPECT1v STRV_MAKE("foo", "'bar'", "\"bar$\"", "x y z", "!``") + + assert_se(lseek(fd, SEEK_SET, 0) == 0); + assert_se(write(fd, CMDLINE1, sizeof CMDLINE1) == sizeof CMDLINE1); + assert_se(ftruncate(fd, sizeof CMDLINE1) == 0); + + assert_se(pid_get_cmdline(0, SIZE_MAX, PROCESS_CMDLINE_QUOTE, &line) >= 0); + log_debug("got: ==%s==", line); + log_debug("exp: ==%s==", EXPECT1); + assert_se(streq(line, EXPECT1)); + line = mfree(line); + + assert_se(pid_get_cmdline(0, SIZE_MAX, PROCESS_CMDLINE_QUOTE_POSIX, &line) >= 0); + log_debug("got: ==%s==", line); + log_debug("exp: ==%s==", EXPECT1p); + assert_se(streq(line, EXPECT1p)); + line = mfree(line); + + assert_se(pid_get_cmdline_strv(0, 0, &args) >= 0); + assert_se(strv_equal(args, EXPECT1v)); + args = strv_free(args); + +#define CMDLINE2 "foo\0\1\2\3\0\0" +#define EXPECT2 "foo \"\\001\\002\\003\"" +#define EXPECT2p "foo $'\\001\\002\\003'" +#define EXPECT2v STRV_MAKE("foo", "\1\2\3") + + assert_se(lseek(fd, SEEK_SET, 0) == 0); + assert_se(write(fd, CMDLINE2, sizeof CMDLINE2) == sizeof CMDLINE2); + assert_se(ftruncate(fd, sizeof CMDLINE2) == 0); + + assert_se(pid_get_cmdline(0, SIZE_MAX, PROCESS_CMDLINE_QUOTE, &line) >= 0); + log_debug("got: ==%s==", line); + log_debug("exp: ==%s==", EXPECT2); + assert_se(streq(line, EXPECT2)); + line = mfree(line); + + assert_se(pid_get_cmdline(0, SIZE_MAX, PROCESS_CMDLINE_QUOTE_POSIX, &line) >= 0); + log_debug("got: ==%s==", line); + log_debug("exp: ==%s==", EXPECT2p); + assert_se(streq(line, EXPECT2p)); + line = mfree(line); + + assert_se(pid_get_cmdline_strv(0, 0, &args) >= 0); + assert_se(strv_equal(args, EXPECT2v)); + args = strv_free(args); + + safe_close(fd); + _exit(EXIT_SUCCESS); +} + +TEST(getpid_cached) { + 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); +} + +TEST(getpid_measure) { + usec_t t, q; + + unsigned long long iterations = slow_tests_enabled() ? 1000000 : 1000; + + log_info("/* %s (%llu iterations) */", __func__, iterations); + + t = now(CLOCK_MONOTONIC); + for (unsigned long long i = 0; i < iterations; i++) + (void) getpid(); + q = now(CLOCK_MONOTONIC) - t; + + log_info(" glibc getpid(): %lf μs each", (double) q / iterations); + + iterations *= 50; /* _cached() is about 50 times faster, so we need more iterations */ + + t = now(CLOCK_MONOTONIC); + for (unsigned long long i = 0; i < iterations; i++) + (void) getpid_cached(); + q = now(CLOCK_MONOTONIC) - t; + + log_info("getpid_cached(): %lf μs each", (double) q / iterations); +} + +TEST(safe_fork) { + 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_SIGTERM|FORK_REARRANGE_STDIO|FORK_REOPEN_LOG, &pid); + assert_se(r >= 0); + + if (r == 0) { + /* child */ + usleep_safe(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); +} + +TEST(pid_to_ptr) { + 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); + + assert_se(PTR_TO_PID(PID_TO_PTR(INT32_MAX)) == INT32_MAX); + assert_se(PTR_TO_PID(PID_TO_PTR(INT32_MIN)) == INT32_MIN); +} + +static void test_ioprio_class_from_to_string_one(const char *val, int expected, int normalized) { + assert_se(ioprio_class_from_string(val) == expected); + if (expected >= 0) { + _cleanup_free_ char *s = NULL; + unsigned ret; + int combined; + + assert_se(ioprio_class_to_string_alloc(expected, &s) == 0); + /* We sometimes get a class number and sometimes a name back */ + assert_se(streq(s, val) || + safe_atou(val, &ret) == 0); + + /* Make sure normalization works, i.e. NONE → BE gets normalized */ + combined = ioprio_normalize(ioprio_prio_value(expected, 0)); + assert_se(ioprio_prio_class(combined) == normalized); + assert_se(expected != IOPRIO_CLASS_NONE || ioprio_prio_data(combined) == 4); + } +} + +TEST(ioprio_class_from_to_string) { + test_ioprio_class_from_to_string_one("none", IOPRIO_CLASS_NONE, IOPRIO_CLASS_BE); + test_ioprio_class_from_to_string_one("realtime", IOPRIO_CLASS_RT, IOPRIO_CLASS_RT); + test_ioprio_class_from_to_string_one("best-effort", IOPRIO_CLASS_BE, IOPRIO_CLASS_BE); + test_ioprio_class_from_to_string_one("idle", IOPRIO_CLASS_IDLE, IOPRIO_CLASS_IDLE); + test_ioprio_class_from_to_string_one("0", IOPRIO_CLASS_NONE, IOPRIO_CLASS_BE); + test_ioprio_class_from_to_string_one("1", 1, 1); + test_ioprio_class_from_to_string_one("7", 7, 7); + test_ioprio_class_from_to_string_one("8", 8, 8); + test_ioprio_class_from_to_string_one("9", -EINVAL, -EINVAL); + test_ioprio_class_from_to_string_one("-1", -EINVAL, -EINVAL); +} + +TEST(setpriority_closest) { + int r; + + r = safe_fork("(test-setprio)", + FORK_RESET_SIGNALS|FORK_CLOSE_ALL_FDS|FORK_DEATHSIG_SIGTERM|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 unprivileged or in a userns of some kind, let's skip + * the full test */ + assert_se(ERRNO_IS_PRIVILEGE(errno)); + full_test = false; + } else { + /* However, if the hard limit was above 30, setrlimit would succeed unprivileged, so + * check if the UID/GID can be changed before enabling the full test. */ + if (setresgid(GID_NOBODY, GID_NOBODY, GID_NOBODY) < 0) { + assert_se(ERRNO_IS_PRIVILEGE(errno)); + full_test = false; + } else if (setresuid(UID_NOBODY, UID_NOBODY, UID_NOBODY) < 0) { + assert_se(ERRNO_IS_PRIVILEGE(errno)); + full_test = false; + } else + 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 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 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); + } +} + +TEST(get_process_ppid) { + uint64_t limit; + int r; + + assert_se(get_process_ppid(1, NULL) == -EADDRNOTAVAIL); + + /* the process with the PID above the global limit definitely doesn't exist. Verify that */ + assert_se(procfs_get_pid_max(&limit) >= 0); + log_debug("kernel.pid_max = %"PRIu64, limit); + + if (limit < INT_MAX) { + r = get_process_ppid(limit + 1, NULL); + log_debug_errno(r, "get_process_limit(%"PRIu64") → %d/%m", limit + 1, r); + assert(r == -ESRCH); + } + + for (pid_t pid = 0;;) { + _cleanup_free_ char *c1 = NULL, *c2 = NULL; + pid_t ppid; + + r = get_process_ppid(pid, &ppid); + if (r == -EADDRNOTAVAIL) { + log_info("No further parent PID"); + break; + } + + assert_se(r >= 0); + + assert_se(pid_get_cmdline(pid, SIZE_MAX, PROCESS_CMDLINE_COMM_FALLBACK, &c1) >= 0); + assert_se(pid_get_cmdline(ppid, SIZE_MAX, PROCESS_CMDLINE_COMM_FALLBACK, &c2) >= 0); + + log_info("Parent of " PID_FMT " (%s) is " PID_FMT " (%s).", pid, c1, ppid, c2); + + pid = ppid; + } +} + +TEST(set_oom_score_adjust) { + int a, b, r; + + assert_se(get_oom_score_adjust(&a) >= 0); + + r = set_oom_score_adjust(OOM_SCORE_ADJ_MIN); + assert_se(r >= 0 || ERRNO_IS_PRIVILEGE(r)); + + if (r >= 0) { + assert_se(get_oom_score_adjust(&b) >= 0); + assert_se(b == OOM_SCORE_ADJ_MIN); + } + + assert_se(set_oom_score_adjust(a) >= 0); + assert_se(get_oom_score_adjust(&b) >= 0); + assert_se(b == a); +} + +static void* dummy_thread(void *p) { + int fd = PTR_TO_FD(p); + char x; + + /* let main thread know we are ready */ + assert_se(write(fd, &(const char) { 'x' }, 1) == 1); + + /* wait for the main thread to tell us to shut down */ + assert_se(read(fd, &x, 1) == 1); + return NULL; +} + +TEST(get_process_threads) { + int r; + + /* Run this test in a child, so that we can guarantee there's exactly one thread around in the child */ + r = safe_fork("(nthreads)", FORK_RESET_SIGNALS|FORK_DEATHSIG_SIGTERM|FORK_REOPEN_LOG|FORK_WAIT|FORK_LOG, NULL); + assert_se(r >= 0); + + if (r == 0) { + _cleanup_close_pair_ int pfd[2] = EBADF_PAIR, ppfd[2] = EBADF_PAIR; + pthread_t t, tt; + char x; + + assert_se(socketpair(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC, 0, pfd) >= 0); + assert_se(socketpair(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC, 0, ppfd) >= 0); + + assert_se(get_process_threads(0) == 1); + assert_se(pthread_create(&t, NULL, &dummy_thread, FD_TO_PTR(pfd[0])) == 0); + assert_se(read(pfd[1], &x, 1) == 1); + assert_se(get_process_threads(0) == 2); + assert_se(pthread_create(&tt, NULL, &dummy_thread, FD_TO_PTR(ppfd[0])) == 0); + assert_se(read(ppfd[1], &x, 1) == 1); + assert_se(get_process_threads(0) == 3); + + assert_se(write(pfd[1], &(const char) { 'x' }, 1) == 1); + assert_se(pthread_join(t, NULL) == 0); + + /* the value reported via /proc/ is decreased asynchronously, and there appears to be no nice + * way to sync on it. Hence we do the weak >= 2 check, even though == 2 is what we'd actually + * like to check here */ + assert_se(get_process_threads(0) >= 2); + + assert_se(write(ppfd[1], &(const char) { 'x' }, 1) == 1); + assert_se(pthread_join(tt, NULL) == 0); + + /* similar here */ + assert_se(get_process_threads(0) >= 1); + + _exit(EXIT_SUCCESS); + } +} + +TEST(is_reaper_process) { + int r; + + r = safe_fork("(regular)", FORK_RESET_SIGNALS|FORK_CLOSE_ALL_FDS|FORK_WAIT, NULL); + assert_se(r >= 0); + if (r == 0) { + /* child */ + + assert_se(is_reaper_process() == 0); + _exit(EXIT_SUCCESS); + } + + r = safe_fork("(newpid)", FORK_RESET_SIGNALS|FORK_CLOSE_ALL_FDS|FORK_WAIT, NULL); + assert_se(r >= 0); + if (r == 0) { + /* child */ + + if (unshare(CLONE_NEWPID) < 0) { + if (ERRNO_IS_PRIVILEGE(errno) || ERRNO_IS_NOT_SUPPORTED(errno)) { + log_notice("Skipping CLONE_NEWPID reaper check, lacking privileges/support"); + _exit(EXIT_SUCCESS); + } + } + + r = safe_fork("(newpid1)", FORK_RESET_SIGNALS|FORK_CLOSE_ALL_FDS|FORK_WAIT, NULL); + assert_se(r >= 0); + if (r == 0) { + /* grandchild, which is PID1 in a pidns */ + assert_se(getpid_cached() == 1); + assert_se(is_reaper_process() > 0); + _exit(EXIT_SUCCESS); + } + + _exit(EXIT_SUCCESS); + } + + r = safe_fork("(subreaper)", FORK_RESET_SIGNALS|FORK_CLOSE_ALL_FDS|FORK_WAIT, NULL); + assert_se(r >= 0); + if (r == 0) { + /* child */ + assert_se(make_reaper_process(true) >= 0); + + assert_se(is_reaper_process() > 0); + _exit(EXIT_SUCCESS); + } +} + +static int intro(void) { + log_show_color(true); + return EXIT_SUCCESS; +} + +DEFINE_TEST_MAIN_WITH_INTRO(LOG_INFO, intro); |