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ee617a4e5ca5828cabd46f3bb1d9ffc0dd3db9e5
systemd/src/test/test-process-util.c
Zbigniew Jędrzejewski-Szmek ee617a4e5c basic: move a bunch of cmdline-related funcs to new argv-util.c+h 
I wanted to move saved_arg[cv] to process-util.c+h, but this causes problems:
process-util.h includes format-util.h which includes net/if.h, which conflicts
with linux/if.h. So we can't include process-util.h in some files.

But process-util.c is very long anyway, so it seems nice to create a new file.
rename_process(), invoked_as(), invoked_by_systemd(), and argv_looks_like_help()
which lived in process-util.c refer to saved_argc and saved_argv, so it seems
reasonable to move them to the new file too.

util.c is now empty, so it is removed. util.h remains.
2022-11-08 18:21:10 +01:00

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/* 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);
}
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 {
assert_se(setresgid(GID_NOBODY, GID_NOBODY, GID_NOBODY) >= 0);
assert_se(setresuid(UID_NOBODY, UID_NOBODY, UID_NOBODY) >= 0);
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);
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