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-rw-r--r--src/test/test-process-util.c355
1 files changed, 267 insertions, 88 deletions
diff --git a/src/test/test-process-util.c b/src/test/test-process-util.c
index 07c0704ef..f19875dae 100644
--- a/src/test/test-process-util.c
+++ b/src/test/test-process-util.c
@@ -1,22 +1,4 @@
-/***
- This file is part of systemd.
-
- Copyright 2010 Lennart Poettering
- Copyright 2013 Thomas H.P. Andersen
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
+/* SPDX-License-Identifier: LGPL-2.1+ */
#include <sched.h>
#include <sys/mount.h>
@@ -26,7 +8,7 @@
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
-#ifdef HAVE_VALGRIND_VALGRIND_H
+#if HAVE_VALGRIND_VALGRIND_H
#include <valgrind/valgrind.h>
#endif
@@ -37,6 +19,7 @@
#include "macro.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"
@@ -48,7 +31,7 @@ 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)];
+ char path[STRLEN("/proc//comm") + DECIMAL_STR_MAX(pid_t)];
#if 0 /// UNNEEDED by elogind
pid_t e;
uid_t u;
@@ -104,10 +87,42 @@ static void test_get_process_comm(pid_t pid) {
if (!detect_container())
assert_se(get_ctty_devnr(pid, &h) == -ENXIO || pid != 1);
- getenv_for_pid(pid, "PATH", &i);
+ (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;
@@ -121,7 +136,7 @@ static void test_pid_is_unwaited(void) {
waitpid(pid, &status, 0);
assert_se(!pid_is_unwaited(pid));
}
- assert_se(pid_is_unwaited(getpid()));
+ assert_se(pid_is_unwaited(getpid_cached()));
assert_se(!pid_is_unwaited(-1));
}
@@ -138,7 +153,7 @@ static void test_pid_is_alive(void) {
waitpid(pid, &status, 0);
assert_se(!pid_is_alive(pid));
}
- assert_se(pid_is_alive(getpid()));
+ assert_se(pid_is_alive(getpid_cached()));
assert_se(!pid_is_alive(-1));
}
@@ -176,7 +191,7 @@ static void test_get_process_cmdline_harder(void) {
if (geteuid() != 0)
return;
-#ifdef HAVE_VALGRIND_VALGRIND_H
+#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 */
@@ -199,6 +214,8 @@ static void test_get_process_cmdline_harder(void) {
assert_se(pid == 0);
assert_se(unshare(CLONE_NEWNS) >= 0);
+ assert_se(mount(NULL, "/", NULL, MS_PRIVATE|MS_REC, NULL) >= 0);
+
fd = mkostemp(path, O_CLOEXEC);
assert_se(fd >= 0);
@@ -213,201 +230,231 @@ static void test_get_process_cmdline_harder(void) {
assert_se(prctl(PR_SET_NAME, "testa") >= 0);
- assert_se(get_process_cmdline(getpid(), 0, false, &line) == -ENOENT);
+ assert_se(get_process_cmdline(getpid_cached(), 0, false, &line) == -ENOENT);
- assert_se(get_process_cmdline(getpid(), 0, true, &line) >= 0);
+ 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(), 1, true, &line) >= 0);
+ assert_se(get_process_cmdline(getpid_cached(), 1, true, &line) >= 0);
assert_se(streq(line, ""));
line = mfree(line);
- assert_se(get_process_cmdline(getpid(), 2, true, &line) >= 0);
+ assert_se(get_process_cmdline(getpid_cached(), 2, true, &line) >= 0);
assert_se(streq(line, "["));
line = mfree(line);
- assert_se(get_process_cmdline(getpid(), 3, true, &line) >= 0);
+ assert_se(get_process_cmdline(getpid_cached(), 3, true, &line) >= 0);
assert_se(streq(line, "[."));
line = mfree(line);
- assert_se(get_process_cmdline(getpid(), 4, true, &line) >= 0);
+ assert_se(get_process_cmdline(getpid_cached(), 4, true, &line) >= 0);
assert_se(streq(line, "[.."));
line = mfree(line);
- assert_se(get_process_cmdline(getpid(), 5, true, &line) >= 0);
+ assert_se(get_process_cmdline(getpid_cached(), 5, true, &line) >= 0);
assert_se(streq(line, "[..."));
line = mfree(line);
- assert_se(get_process_cmdline(getpid(), 6, true, &line) >= 0);
+ assert_se(get_process_cmdline(getpid_cached(), 6, true, &line) >= 0);
assert_se(streq(line, "[...]"));
line = mfree(line);
- assert_se(get_process_cmdline(getpid(), 7, true, &line) >= 0);
+ 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(), 8, true, &line) >= 0);
+ 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(), 0, false, &line) == -ENOENT);
+ assert_se(get_process_cmdline(getpid_cached(), 0, false, &line) == -ENOENT);
- assert_se(get_process_cmdline(getpid(), 0, true, &line) >= 0);
+ 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(), 0, false, &line) >= 0);
+ 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(), 0, true, &line) >= 0);
+ 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(), 0, false, &line) >= 0);
+ 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(), 0, true, &line) >= 0);
+ 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(), 1, true, &line) >= 0);
+ assert_se(get_process_cmdline(getpid_cached(), 1, true, &line) >= 0);
assert_se(streq(line, ""));
line = mfree(line);
- assert_se(get_process_cmdline(getpid(), 2, true, &line) >= 0);
+ assert_se(get_process_cmdline(getpid_cached(), 2, true, &line) >= 0);
assert_se(streq(line, "."));
line = mfree(line);
- assert_se(get_process_cmdline(getpid(), 3, true, &line) >= 0);
+ assert_se(get_process_cmdline(getpid_cached(), 3, true, &line) >= 0);
assert_se(streq(line, ".."));
line = mfree(line);
- assert_se(get_process_cmdline(getpid(), 4, true, &line) >= 0);
+ assert_se(get_process_cmdline(getpid_cached(), 4, true, &line) >= 0);
assert_se(streq(line, "..."));
line = mfree(line);
- assert_se(get_process_cmdline(getpid(), 5, true, &line) >= 0);
+ 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(), 6, true, &line) >= 0);
+ 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(), 7, true, &line) >= 0);
+ 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(), 8, true, &line) >= 0);
+ 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(), 9, true, &line) >= 0);
+ 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(), 10, true, &line) >= 0);
+ 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(), 11, true, &line) >= 0);
+ 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(), 12, true, &line) >= 0);
+ 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(), 13, true, &line) >= 0);
+ 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(), 14, true, &line) >= 0);
+ 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(), 1000, true, &line) >= 0);
+ 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(), 0, false, &line) == -ENOENT);
+ assert_se(get_process_cmdline(getpid_cached(), 0, false, &line) == -ENOENT);
- assert_se(get_process_cmdline(getpid(), 0, true, &line) >= 0);
+ 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(), 10, true, &line) >= 0);
+ 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(), 11, true, &line) >= 0);
+ 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(), 12, true, &line) >= 0);
+ assert_se(get_process_cmdline(getpid_cached(), 12, true, &line) >= 0);
assert_se(streq(line, "[aaaa b...]"));
line = mfree(line);
safe_close(fd);
- _exit(0);
+ _exit(EXIT_SUCCESS);
}
#if 0 /// UNNEEDED by elogind
-static void test_rename_process_one(const char *p, int ret) {
+static void test_rename_process_now(const char *p, int ret) {
_cleanup_free_ char *comm = NULL, *cmdline = NULL;
- pid_t pid;
int r;
- 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 */
r = rename_process(p);
-
assert_se(r == ret ||
(ret == 0 && r >= 0) ||
(ret > 0 && r > 0));
if (r < 0)
- goto finish;
+ return;
-#ifdef HAVE_VALGRIND_VALGRIND_H
+#if HAVE_VALGRIND_VALGRIND_H
/* see above, valgrind is weird, we can't verify what we are doing here */
if (RUNNING_ON_VALGRIND)
- goto finish;
+ return;
#endif
assert_se(get_process_comm(0, &comm) >= 0);
log_info("comm = <%s>", comm);
- assert_se(strneq(comm, p, 15));
+ assert_se(strneq(comm, p, TASK_COMM_LEN-1));
assert_se(get_process_cmdline(0, 0, false, &cmdline) >= 0);
- log_info("cmdline = <%s>", cmdline);
- assert_se(strneq(p, cmdline, strlen("test-process-util")));
- assert_se(startswith(p, cmdline));
+ /* we cannot expect cmdline to be renamed properly without privileges */
+ if (geteuid() == 0) {
+ log_info("cmdline = <%s>", cmdline);
+ assert_se(strneq(p, cmdline, STRLEN("test-process-util")));
+ assert_se(startswith(p, cmdline));
+ } else
+ log_info("cmdline = <%s> (not verified)", cmdline);
+}
+
+static void test_rename_process_one(const char *p, int ret) {
+ siginfo_t si;
+ pid_t pid;
+
+ pid = fork();
+ assert_se(pid >= 0);
+
+ if (pid == 0) {
+ /* child */
+ test_rename_process_now(p, ret);
+ _exit(EXIT_SUCCESS);
+ }
+
+ assert_se(wait_for_terminate(pid, &si) >= 0);
+ assert_se(si.si_code == CLD_EXITED);
+ assert_se(si.si_status == EXIT_SUCCESS);
+}
+
+static void test_rename_process_multi(void) {
+ pid_t pid;
+
+ pid = fork();
+ assert_se(pid >= 0);
+
+ if (pid > 0) {
+ siginfo_t si;
+
+ assert_se(wait_for_terminate(pid, &si) >= 0);
+ assert_se(si.si_code == CLD_EXITED);
+ assert_se(si.si_status == EXIT_SUCCESS);
+
+ return;
+ }
-finish:
+ /* 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);
}
@@ -417,11 +464,135 @@ static void test_rename_process(void) {
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 */
}
#endif // 0
-int main(int argc, char *argv[]) {
+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
+}
+
+#if 0 /// UNNEEDED by elogind
+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);
+}
+#endif // 0
+
+int main(int argc, char *argv[]) {
log_set_max_level(LOG_DEBUG);
log_parse_environment();
log_open();
@@ -439,6 +610,7 @@ int main(int argc, char *argv[]) {
test_get_process_comm(getpid());
}
+ test_get_process_comm_escape();
test_pid_is_unwaited();
test_pid_is_alive();
#if 0 /// UNNEEDED by elogind
@@ -448,6 +620,13 @@ int main(int argc, char *argv[]) {
#if 0 /// UNNEEDED by elogind
test_rename_process();
#endif // 0
+ test_getpid_cached();
+ test_getpid_measure();
+ test_safe_fork();
+ test_pid_to_ptr();
+#if 0 /// UNNEEDED by elogind
+ test_ioprio_class_from_to_string();
+#endif // 0
return 0;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-02 09:20:34 +0000