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-rw-r--r--src/test/test-process-util.c282
1 files changed, 243 insertions, 39 deletions
diff --git a/src/test/test-process-util.c b/src/test/test-process-util.c
index 4616314200..562ad4acb8 100644
--- a/src/test/test-process-util.c
+++ b/src/test/test-process-util.c
@@ -18,82 +18,87 @@
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
+#include <sched.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>
+#ifdef HAVE_VALGRIND_VALGRIND_H
+#include <valgrind/valgrind.h>
+#endif
#include "alloc-util.h"
#include "architecture.h"
+#include "fd-util.h"
#include "log.h"
#include "macro.h"
+#include "parse-util.h"
#include "process-util.h"
+#include "stdio-util.h"
#include "string-util.h"
#include "terminal-util.h"
#include "util.h"
#include "virt.h"
-static void test_get_process_comm(void) {
+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, *cwd = NULL, *root = NULL;
+ _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;
- pid_t me;
-
- if (stat("/proc/1/comm", &st) == 0) {
- assert_se(get_process_comm(1, &a) >= 0);
- log_info("pid1 comm: '%s'", a);
- } else
- log_warning("/proc/1/comm does not exist.");
- assert_se(get_process_cmdline(1, 0, true, &c) >= 0);
- log_info("pid1 cmdline: '%s'", c);
+ xsprintf(path, "/proc/"PID_FMT"/comm", pid);
- assert_se(get_process_cmdline(1, 8, false, &d) >= 0);
- log_info("pid1 cmdline truncated: '%s'", d);
+ 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_ppid(1, &e) >= 0);
- log_info("pid1 ppid: "PID_FMT, e);
- assert_se(e == 0);
+ assert_se(get_process_cmdline(pid, 0, true, &c) >= 0);
+ log_info("PID"PID_FMT" cmdline: '%s'", pid, c);
- assert_se(is_kernel_thread(1) == 0);
+ assert_se(get_process_cmdline(pid, 8, false, &d) >= 0);
+ log_info("PID"PID_FMT" cmdline truncated to 8: '%s'", pid, d);
- r = get_process_exe(1, &f);
- assert_se(r >= 0 || r == -EACCES);
- log_info("pid1 exe: '%s'", strna(f));
+ free(d);
+ assert_se(get_process_cmdline(pid, 1, false, &d) >= 0);
+ log_info("PID"PID_FMT" cmdline truncated to 1: '%s'", pid, d);
- assert_se(get_process_uid(1, &u) == 0);
- log_info("pid1 uid: "UID_FMT, u);
- assert_se(u == 0);
+ assert_se(get_process_ppid(pid, &e) >= 0);
+ log_info("PID"PID_FMT" PPID: "PID_FMT, pid, e);
+ assert_se(pid == 1 ? e == 0 : e > 0);
- assert_se(get_process_gid(1, &g) == 0);
- log_info("pid1 gid: "GID_FMT, g);
- assert_se(g == 0);
+ assert_se(is_kernel_thread(pid) == 0 || pid != 1);
- me = getpid();
-
- r = get_process_cwd(me, &cwd);
+ r = get_process_exe(pid, &f);
assert_se(r >= 0 || r == -EACCES);
- log_info("pid1 cwd: '%s'", cwd);
+ log_info("PID"PID_FMT" exe: '%s'", pid, strna(f));
- r = get_process_root(me, &root);
- assert_se(r >= 0 || r == -EACCES);
- log_info("pid1 root: '%s'", root);
+ assert_se(get_process_uid(pid, &u) == 0);
+ log_info("PID"PID_FMT" UID: "UID_FMT, pid, u);
+ assert_se(u == 0 || pid != 1);
- r = get_process_environ(me, &env);
+ assert_se(get_process_gid(pid, &g) == 0);
+ log_info("PID"PID_FMT" GID: "GID_FMT, pid, g);
+ assert_se(g == 0 || pid != 1);
+
+ r = get_process_environ(pid, &env);
assert_se(r >= 0 || r == -EACCES);
- log_info("self strlen(environ): '%zu'", strlen(env));
+ 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(1, &h) == -ENXIO);
+ assert_se(get_ctty_devnr(pid, &h) == -ENXIO || pid != 1);
- getenv_for_pid(1, "PATH", &i);
- log_info("pid1 $PATH: '%s'", strna(i));
+ getenv_for_pid(pid, "PATH", &i);
+ log_info("PID"PID_FMT" $PATH: '%s'", pid, strna(i));
}
static void test_pid_is_unwaited(void) {
@@ -153,14 +158,213 @@ static void test_personality(void) {
#endif
}
+static void test_get_process_cmdline_harder(void) {
+ char path[] = "/tmp/test-cmdlineXXXXXX";
+ _cleanup_close_ int fd = -1;
+ _cleanup_free_ char *line = NULL;
+ pid_t pid;
+
+ if (geteuid() != 0)
+ return;
+
+#ifdef 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)
+ 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);
+
+ fd = mkostemp(path, O_CLOEXEC);
+ assert_se(fd >= 0);
+ assert_se(mount(path, "/proc/self/cmdline", "bind", MS_BIND, NULL) >= 0);
+ assert_se(unlink(path) >= 0);
+
+ assert_se(prctl(PR_SET_NAME, "testa") >= 0);
+
+ assert_se(get_process_cmdline(getpid(), 0, false, &line) == -ENOENT);
+
+ assert_se(get_process_cmdline(getpid(), 0, true, &line) >= 0);
+ assert_se(streq(line, "[testa]"));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid(), 1, true, &line) >= 0);
+ assert_se(streq(line, ""));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid(), 2, true, &line) >= 0);
+ assert_se(streq(line, "["));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid(), 3, true, &line) >= 0);
+ assert_se(streq(line, "[."));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid(), 4, true, &line) >= 0);
+ assert_se(streq(line, "[.."));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid(), 5, true, &line) >= 0);
+ assert_se(streq(line, "[..."));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid(), 6, true, &line) >= 0);
+ assert_se(streq(line, "[...]"));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid(), 7, true, &line) >= 0);
+ assert_se(streq(line, "[t...]"));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid(), 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(), 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(streq(line, "foo bar"));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid(), 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(streq(line, "foo bar quux"));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid(), 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(streq(line, ""));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid(), 2, true, &line) >= 0);
+ assert_se(streq(line, "."));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid(), 3, true, &line) >= 0);
+ assert_se(streq(line, ".."));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid(), 4, true, &line) >= 0);
+ assert_se(streq(line, "..."));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid(), 5, true, &line) >= 0);
+ assert_se(streq(line, "f..."));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid(), 6, true, &line) >= 0);
+ assert_se(streq(line, "fo..."));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid(), 7, true, &line) >= 0);
+ assert_se(streq(line, "foo..."));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid(), 8, true, &line) >= 0);
+ assert_se(streq(line, "foo..."));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid(), 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(streq(line, "foo ba..."));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid(), 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(streq(line, "foo bar..."));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid(), 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(streq(line, "foo bar quux"));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid(), 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(), 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(streq(line, "[aaaa...]"));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid(), 11, true, &line) >= 0);
+ assert_se(streq(line, "[aaaa...]"));
+ line = mfree(line);
+
+ assert_se(get_process_cmdline(getpid(), 12, true, &line) >= 0);
+ assert_se(streq(line, "[aaaa b...]"));
+ line = mfree(line);
+
+ safe_close(fd);
+ _exit(0);
+}
+
int main(int argc, char *argv[]) {
log_parse_environment();
log_open();
- test_get_process_comm();
+ if (argc > 1) {
+ pid_t pid = 0;
+
+ (void) parse_pid(argv[1], &pid);
+ test_get_process_comm(pid);
+ } else {
+ test_get_process_comm(1);
+ test_get_process_comm(getpid());
+ }
+
test_pid_is_unwaited();
test_pid_is_alive();
test_personality();
+ test_get_process_cmdline_harder();
return 0;
}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-07-14 01:31:00 +0000