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-rw-r--r--src/test/test-process-util.c911
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);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-18 15:44:11 +0000