+static void test_execution_order(void) {
+ char template_lo[] = "/tmp/test-exec-util-lo.XXXXXXX";
+ char template_hi[] = "/tmp/test-exec-util-hi.XXXXXXX";
+ const char *dirs[] = {template_hi, template_lo, NULL};
+ const char *name, *name2, *name3, *overridden, *override, *masked, *mask;
+ const char *output, *t;
+ _cleanup_free_ char *contents = NULL;
+
+ assert_se(mkdtemp(template_lo));
+ assert_se(mkdtemp(template_hi));
+
+ output = strjoina(template_hi, "/output");
+
+ log_info("/* %s >>%s */", __func__, output);
+
+ /* write files in "random" order */
+ name2 = strjoina(template_lo, "/90-bar");
+ name = strjoina(template_hi, "/80-foo");
+ name3 = strjoina(template_lo, "/last");
+ overridden = strjoina(template_lo, "/30-override");
+ override = strjoina(template_hi, "/30-override");
+ masked = strjoina(template_lo, "/10-masked");
+ mask = strjoina(template_hi, "/10-masked");
+
+ t = strjoina("#!/bin/sh\necho $(basename $0) >>", output);
+ assert_se(write_string_file(name, t, WRITE_STRING_FILE_CREATE) == 0);
+
+ t = strjoina("#!/bin/sh\necho $(basename $0) >>", output);
+ assert_se(write_string_file(name2, t, WRITE_STRING_FILE_CREATE) == 0);
+
+ t = strjoina("#!/bin/sh\necho $(basename $0) >>", output);
+ assert_se(write_string_file(name3, t, WRITE_STRING_FILE_CREATE) == 0);
+
+ t = strjoina("#!/bin/sh\necho OVERRIDDEN >>", output);
+ assert_se(write_string_file(overridden, t, WRITE_STRING_FILE_CREATE) == 0);
+
+ t = strjoina("#!/bin/sh\necho $(basename $0) >>", output);
+ assert_se(write_string_file(override, t, WRITE_STRING_FILE_CREATE) == 0);
+
+ t = strjoina("#!/bin/sh\necho MASKED >>", output);
+ assert_se(write_string_file(masked, t, WRITE_STRING_FILE_CREATE) == 0);
+
+ assert_se(symlink("/dev/null", mask) == 0);
+
+ assert_se(chmod(name, 0755) == 0);
+ assert_se(chmod(name2, 0755) == 0);
+ assert_se(chmod(name3, 0755) == 0);
+ assert_se(chmod(overridden, 0755) == 0);
+ assert_se(chmod(override, 0755) == 0);
+ assert_se(chmod(masked, 0755) == 0);
+
+ execute_directories(dirs, DEFAULT_TIMEOUT_USEC, ignore_stdout, ignore_stdout_args, NULL);
+
+ assert_se(read_full_file(output, &contents, NULL) >= 0);
+ assert_se(streq(contents, "30-override\n80-foo\n90-bar\nlast\n"));
+
+ (void) rm_rf(template_lo, REMOVE_ROOT|REMOVE_PHYSICAL);
+ (void) rm_rf(template_hi, REMOVE_ROOT|REMOVE_PHYSICAL);
+}
+
+static int gather_stdout_one(int fd, void *arg) {
+ char ***s = arg, *t;
+ char buf[128] = {};
+
+ assert_se(s);
+ assert_se(read(fd, buf, sizeof buf) >= 0);
+ safe_close(fd);
+
+ assert_se(t = strndup(buf, sizeof buf));
+ assert_se(strv_push(s, t) >= 0);
+
+ return 0;
+}
+static int gather_stdout_two(int fd, void *arg) {
+ char ***s = arg, **t;
+
+ STRV_FOREACH(t, *s)
+ assert_se(write(fd, *t, strlen(*t)) == (ssize_t) strlen(*t));
+ safe_close(fd);
+
+ return 0;
+}
+static int gather_stdout_three(int fd, void *arg) {
+ char **s = arg;
+ char buf[128] = {};
+
+ assert_se(read(fd, buf, sizeof buf - 1) > 0);
+ safe_close(fd);
+ assert_se(*s = strndup(buf, sizeof buf));
+
+ return 0;
+}
+
+const gather_stdout_callback_t const gather_stdout[] = {
+ gather_stdout_one,
+ gather_stdout_two,
+ gather_stdout_three,
+};
+
+
+static void test_stdout_gathering(void) {
+ char template[] = "/tmp/test-exec-util.XXXXXXX";
+ const char *dirs[] = {template, NULL};
+ const char *name, *name2, *name3;
+ int r;
+
+ char **tmp = NULL; /* this is only used in the forked process, no cleanup here */
+ _cleanup_free_ char *output = NULL;
+
+ void* args[] = {&tmp, &tmp, &output};
+
+ assert_se(mkdtemp(template));
+
+ log_info("/* %s */", __func__);
+
+ /* write files */
+ name = strjoina(template, "/10-foo");
+ name2 = strjoina(template, "/20-bar");
+ name3 = strjoina(template, "/30-last");
+
+ assert_se(write_string_file(name,
+ "#!/bin/sh\necho a\necho b\necho c\n",
+ WRITE_STRING_FILE_CREATE) == 0);
+ assert_se(write_string_file(name2,
+ "#!/bin/sh\necho d\n",
+ WRITE_STRING_FILE_CREATE) == 0);
+ assert_se(write_string_file(name3,
+ "#!/bin/sh\nsleep 1",
+ WRITE_STRING_FILE_CREATE) == 0);
+
+ assert_se(chmod(name, 0755) == 0);
+ assert_se(chmod(name2, 0755) == 0);
+ assert_se(chmod(name3, 0755) == 0);
+
+ r = execute_directories(dirs, DEFAULT_TIMEOUT_USEC, gather_stdout, args, NULL);
+ assert_se(r >= 0);
+
+ log_info("got: %s", output);
+
+ assert_se(streq(output, "a\nb\nc\nd\n"));
+}
+