diff options
Diffstat (limited to '')
| -rw-r--r-- | src/test/test-process-util.c | 911 |
1 files changed, 911 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..f5cf22b --- /dev/null +++ b/src/test/test-process-util.c @@ -0,0 +1,911 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ + +#include <fcntl.h> +#include <linux/oom.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 "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 "util.h" +#include "virt.h" + +static void test_get_process_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(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, PROCESS_CMDLINE_COMM_FALLBACK, &c) >= 0); + log_info("PID"PID_FMT" cmdline: '%s'", pid, c); + + assert_se(get_process_cmdline(pid, 8, 0, &d) >= 0); + log_info("PID"PID_FMT" cmdline truncated to 8: '%s'", pid, d); + + free(d); + assert_se(get_process_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(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)); +} + +TEST(get_process_comm) { + if (saved_argc > 1) { + pid_t pid = 0; + + (void) parse_pid(saved_argv[1], &pid); + test_get_process_comm_one(pid); + } else { + TEST_REQ_RUNNING_SYSTEMD(test_get_process_comm_one(1)); + test_get_process_comm_one(getpid()); + } +} + +static void test_get_process_cmdline_one(pid_t pid) { + _cleanup_free_ char *c = NULL, *d = NULL, *e = NULL, *f = NULL, *g = NULL, *h = NULL; + int r; + + r = get_process_cmdline(pid, SIZE_MAX, 0, &c); + log_info("PID "PID_FMT": %s", pid, r >= 0 ? c : errno_to_name(r)); + + r = get_process_cmdline(pid, SIZE_MAX, PROCESS_CMDLINE_COMM_FALLBACK, &d); + log_info(" %s", r >= 0 ? d : errno_to_name(r)); + + r = get_process_cmdline(pid, SIZE_MAX, PROCESS_CMDLINE_QUOTE, &e); + log_info(" %s", r >= 0 ? e : errno_to_name(r)); + + r = get_process_cmdline(pid, SIZE_MAX, PROCESS_CMDLINE_QUOTE | PROCESS_CMDLINE_COMM_FALLBACK, &f); + log_info(" %s", r >= 0 ? f : errno_to_name(r)); + + r = get_process_cmdline(pid, SIZE_MAX, PROCESS_CMDLINE_QUOTE_POSIX, &g); + log_info(" %s", r >= 0 ? g : errno_to_name(r)); + + r = get_process_cmdline(pid, SIZE_MAX, PROCESS_CMDLINE_QUOTE_POSIX | PROCESS_CMDLINE_COMM_FALLBACK, &h); + log_info(" %s", r >= 0 ? h : errno_to_name(r)); +} + +TEST(get_process_cmdline) { + _cleanup_closedir_ DIR *d = NULL; + + assert_se(d = opendir("/proc")); + + FOREACH_DIRENT(de, d, return) { + pid_t pid; + + if (de->d_type != DT_DIR) + continue; + + if (parse_pid(de->d_name, &pid) < 0) + continue; + + test_get_process_cmdline_one(pid); + } +} + +static void test_get_process_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(get_process_comm(0, &n) >= 0); + + log_debug("got: <%s>", n); + + assert_se(streq_ptr(n, output)); +} + +TEST(get_process_comm_escape) { + _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\\266\\303\\274\\303\\237"); + test_get_process_comm_escape_one("xäöüß", "x\\303\\244\\303\\266\\303\\274\\303\\237"); + test_get_process_comm_escape_one("xxäöüß", "xx\\303\\244\\303\\266\\303\\274\\303\\237"); + test_get_process_comm_escape_one("xxxäöüß", "xxx\\303\\244\\303\\266\\303\\274\\303\\237"); + test_get_process_comm_escape_one("xxxxäöüß", "xxxx\\303\\244\\303\\266\\303\\274\\303\\237"); + test_get_process_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; + + waitpid(pid, &status, 0); + assert_se(!pid_is_unwaited(pid)); + } + assert_se(pid_is_unwaited(getpid_cached())); + assert_se(!pid_is_unwaited(-1)); +} + +TEST(pid_is_alive) { + 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)); +} + +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(get_process_cmdline_harder) { + 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; + } + + /* Set RLIMIT_STACK to infinity to test we don't try to allocate unncessarily 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(get_process_cmdline(0, SIZE_MAX, 0, &line) == -ENOENT); + + assert_se(get_process_cmdline(0, SIZE_MAX, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + log_debug("'%s'", line); + assert_se(streq(line, "[testa]")); + line = mfree(line); + + assert_se(get_process_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(get_process_cmdline(0, 0, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + log_debug("'%s'", line); + assert_se(streq(line, "")); + line = mfree(line); + + assert_se(get_process_cmdline(0, 1, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + assert_se(streq(line, "…")); + line = mfree(line); + + assert_se(get_process_cmdline(0, 2, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + assert_se(streq(line, "[…")); + line = mfree(line); + + assert_se(get_process_cmdline(0, 3, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + assert_se(streq(line, "[t…")); + line = mfree(line); + + assert_se(get_process_cmdline(0, 4, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + assert_se(streq(line, "[te…")); + line = mfree(line); + + assert_se(get_process_cmdline(0, 5, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + assert_se(streq(line, "[tes…")); + line = mfree(line); + + assert_se(get_process_cmdline(0, 6, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + assert_se(streq(line, "[test…")); + line = mfree(line); + + assert_se(get_process_cmdline(0, 7, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + assert_se(streq(line, "[testa]")); + line = mfree(line); + + assert_se(get_process_cmdline(0, 8, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + assert_se(streq(line, "[testa]")); + line = mfree(line); + + /* Test with multiple arguments that don't require quoting */ + + assert_se(write(fd, "foo\0bar", 8) == 8); + + assert_se(get_process_cmdline(0, SIZE_MAX, 0, &line) >= 0); + log_debug("'%s'", line); + assert_se(streq(line, "foo bar")); + line = mfree(line); + + assert_se(get_process_cmdline(0, SIZE_MAX, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + assert_se(streq(line, "foo bar")); + line = mfree(line); + + assert_se(write(fd, "quux", 4) == 4); + assert_se(get_process_cmdline(0, SIZE_MAX, 0, &line) >= 0); + log_debug("'%s'", line); + assert_se(streq(line, "foo bar quux")); + line = mfree(line); + + assert_se(get_process_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(get_process_cmdline(0, 1, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + log_debug("'%s'", line); + assert_se(streq(line, "…")); + line = mfree(line); + + assert_se(get_process_cmdline(0, 2, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + log_debug("'%s'", line); + assert_se(streq(line, "f…")); + line = mfree(line); + + assert_se(get_process_cmdline(0, 3, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + log_debug("'%s'", line); + assert_se(streq(line, "fo…")); + line = mfree(line); + + assert_se(get_process_cmdline(0, 4, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + log_debug("'%s'", line); + assert_se(streq(line, "foo…")); + line = mfree(line); + + assert_se(get_process_cmdline(0, 5, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + log_debug("'%s'", line); + assert_se(streq(line, "foo …")); + line = mfree(line); + + assert_se(get_process_cmdline(0, 6, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + log_debug("'%s'", line); + assert_se(streq(line, "foo b…")); + line = mfree(line); + + assert_se(get_process_cmdline(0, 7, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + log_debug("'%s'", line); + assert_se(streq(line, "foo ba…")); + line = mfree(line); + + assert_se(get_process_cmdline(0, 8, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + log_debug("'%s'", line); + assert_se(streq(line, "foo bar…")); + line = mfree(line); + + assert_se(get_process_cmdline(0, 9, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + log_debug("'%s'", line); + assert_se(streq(line, "foo bar …")); + line = mfree(line); + + assert_se(get_process_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(get_process_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(get_process_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(get_process_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(get_process_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(get_process_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(ftruncate(fd, 0) >= 0); + assert_se(prctl(PR_SET_NAME, "aaaa bbbb cccc") >= 0); + + assert_se(get_process_cmdline(0, SIZE_MAX, 0, &line) == -ENOENT); + + assert_se(get_process_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(get_process_cmdline(0, 10, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + log_debug("'%s'", line); + assert_se(streq(line, "[aaaa bbb…")); + line = mfree(line); + + assert_se(get_process_cmdline(0, 11, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + log_debug("'%s'", line); + assert_se(streq(line, "[aaaa bbbb…")); + line = mfree(line); + + assert_se(get_process_cmdline(0, 12, PROCESS_CMDLINE_COMM_FALLBACK, &line) >= 0); + log_debug("'%s'", line); + assert_se(streq(line, "[aaaa bbbb …")); + line = mfree(line); + + /* 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' $'!``'" + 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(get_process_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(get_process_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); + +#define CMDLINE2 "foo\0\1\2\3\0\0" +#define EXPECT2 "foo \"\\001\\002\\003\"" +#define EXPECT2p "foo $'\\001\\002\\003'" + 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(get_process_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(get_process_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); + + 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; + + log_info("/* %s(%s) */", __func__, p); + + r = rename_process(p); + assert_se(r == ret || + (ret == 0 && r >= 0) || + (ret > 0 && r > 0)); + + log_debug_errno(r, "rename_process(%s): %m", p); + + 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_debug("comm = <%s>", comm); + assert_se(strneq(comm, p, TASK_COMM_LEN-1)); + /* We expect comm to be at most 16 bytes (TASK_COMM_LEN). The kernel may raise this limit in the + * future. We'd only check the initial part, at least until we recompile, but this will still pass. */ + + r = get_process_cmdline(0, SIZE_MAX, 0, &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> (expected <%.*s>)", cmdline, (int) strlen("test-process-util"), p); + + bool skip = cmdline[0] == '"'; /* A shortcut to check if the string is quoted */ + + assert_se(strneq(cmdline + skip, p, strlen("test-process-util"))); + assert_se(startswith(cmdline + skip, p)); + } + } 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; + + log_info("/* %s(%s) */", __func__, p); + + 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); +} + +TEST(rename_process_invalid) { + assert_se(rename_process(NULL) == -EINVAL); + assert_se(rename_process("") == -EINVAL); +} + +TEST(rename_process_multi) { + 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 */ + _exit(EXIT_SUCCESS); +} + +TEST(rename_process) { + 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(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\n", (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\n", (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|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); +} + +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|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(get_process_cmdline(pid, SIZE_MAX, PROCESS_CMDLINE_COMM_FALLBACK, &c1) >= 0); + assert_se(get_process_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 int intro(void) { + log_show_color(true); + return EXIT_SUCCESS; +} + +DEFINE_TEST_MAIN_WITH_INTRO(LOG_INFO, intro); |