process: Provide an abstraction to spawn child processes with redirected I/O

src/libstrongswan/tests/Makefile.am

@@ -30,6 +30,7 @@ tests_SOURCES = tests.h tests.c \
   suites/test_hashtable.c \
   suites/test_identification.c \
   suites/test_threading.c \
+  suites/test_process.c \
   suites/test_watcher.c \
   suites/test_stream.c \
   suites/test_fetch_http.c \

src/libstrongswan/tests/suites/test_process.c

@@ -0,0 +1,173 @@
+/*
+ * Copyright (C) 2014 Martin Willi
+ * Copyright (C) 2014 revosec AG
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program 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 General Public License
+ * for more details.
+ */
+
+#include "test_suite.h"
+
+#include <unistd.h>
+
+#include <utils/process.h>
+
+START_TEST(test_retval_true)
+{
+	process_t *process;
+	char *argv[] = {
+		"/bin/true",
+		NULL
+	};
+	int retval;
+
+	process = process_start(argv, NULL, NULL, NULL, NULL, TRUE);
+	ck_assert(process != NULL);
+	ck_assert(process->wait(process, &retval));
+	ck_assert_int_eq(retval, 0);
+}
+END_TEST
+
+START_TEST(test_retval_false)
+{
+	process_t *process;
+	char *argv[] = {
+		"/bin/false",
+		NULL
+	};
+	int retval;
+
+	process = process_start(argv, NULL, NULL, NULL, NULL, TRUE);
+	ck_assert(process != NULL);
+	ck_assert(process->wait(process, &retval));
+	ck_assert(retval != 0);
+}
+END_TEST
+
+START_TEST(test_not_found)
+{
+	process_t *process;
+	char *argv[] = {
+		"/bin/does-not-exist",
+		NULL
+	};
+
+	process = process_start(argv, NULL, NULL, NULL, NULL, TRUE);
+	/* both is acceptable behavior */
+	ck_assert(process == NULL || !process->wait(process, NULL));
+}
+END_TEST
+
+START_TEST(test_echo)
+{
+	process_t *process;
+	char *argv[] = {
+		"/bin/cat",
+		NULL
+	};
+	int retval, in, out;
+	char *msg = "test";
+	char buf[strlen(msg) + 1];
+
+	memset(buf, 0, strlen(msg) + 1);
+
+	process = process_start(argv, NULL, &in, &out, NULL, TRUE);
+	ck_assert(process != NULL);
+	ck_assert_int_eq(write(in, msg, strlen(msg)), strlen(msg));
+	ck_assert(close(in) == 0);
+	ck_assert_int_eq(read(out, buf, strlen(msg) + 1), strlen(msg));
+	ck_assert_str_eq(buf, msg);
+	ck_assert(close(out) == 0);
+	ck_assert(process->wait(process, &retval));
+	ck_assert_int_eq(retval, 0);
+}
+END_TEST
+
+START_TEST(test_echo_err)
+{
+	process_t *process;
+	char *argv[] = {
+		"/bin/sh",
+		"-c",
+		"1>&2 /bin/cat",
+		NULL
+	};
+	int retval, in, err;
+	char *msg = "a longer test message";
+	char buf[strlen(msg) + 1];
+
+	memset(buf, 0, strlen(msg) + 1);
+
+	process = process_start(argv, NULL, &in, NULL, &err, TRUE);
+	ck_assert(process != NULL);
+	ck_assert_int_eq(write(in, msg, strlen(msg)), strlen(msg));
+	ck_assert(close(in) == 0);
+	ck_assert_int_eq(read(err, buf, strlen(msg) + 1), strlen(msg));
+	ck_assert_str_eq(buf, msg);
+	ck_assert(close(err) == 0);
+	ck_assert(process->wait(process, &retval));
+	ck_assert_int_eq(retval, 0);
+}
+END_TEST
+
+START_TEST(test_env)
+{
+	process_t *process;
+	char *argv[] = {
+		"/bin/sh",
+		"-c",
+		"echo -n $A $B",
+		NULL
+	};
+	char *envp[] = {
+		"A=atest",
+		"B=bstring",
+		NULL
+	};
+	int retval, out;
+	char buf[64] = {};
+
+	process = process_start(argv, envp, NULL, &out, NULL, TRUE);
+	ck_assert(process != NULL);
+	ck_assert(read(out, buf, sizeof(buf)) > 0);
+	ck_assert_str_eq(buf, "atest bstring");
+	ck_assert(close(out) == 0);
+	ck_assert(process->wait(process, &retval));
+	ck_assert_int_eq(retval, 0);
+}
+END_TEST
+
+Suite *process_suite_create()
+{
+	Suite *s;
+	TCase *tc;
+
+	s = suite_create("process");
+
+	tc = tcase_create("return values");
+	tcase_add_test(tc, test_retval_true);
+	tcase_add_test(tc, test_retval_false);
+	suite_add_tcase(s, tc);
+
+	tc = tcase_create("not found");
+	tcase_add_test(tc, test_not_found);
+	suite_add_tcase(s, tc);
+
+	tc = tcase_create("echo");
+	tcase_add_test(tc, test_echo);
+	tcase_add_test(tc, test_echo_err);
+	suite_add_tcase(s, tc);
+
+	tc = tcase_create("env");
+	tcase_add_test(tc, test_env);
+	suite_add_tcase(s, tc);
+
+	return s;
+}

src/libstrongswan/tests/tests.h

@@ -24,6 +24,7 @@ TEST_SUITE(hashtable_suite_create)
 TEST_SUITE(array_suite_create)
 TEST_SUITE(identification_suite_create)
 TEST_SUITE(threading_suite_create)
+TEST_SUITE(process_suite_create)
 TEST_SUITE(watcher_suite_create)
 TEST_SUITE(stream_suite_create)
 TEST_SUITE(utils_suite_create)