config: Remove use of %m sscanf format specifier

The %m format specifier isn't defined by the C standards and so produces
an error under CFLAGS=`-pedantic -Werror`.

Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Change-Id: I7fd818582472ced3f8e6adc2ea5d545b5b7dc020
diff --git a/test/test-config-parse.c b/test/test-config-parse.c
new file mode 100644
index 0000000..6392bd9
--- /dev/null
+++ b/test/test-config-parse.c
@@ -0,0 +1,74 @@
+
+#include <assert.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdio.h>
+
+#ifndef SYSCONFDIR
+// Bypass compilation error due to -DSYSCONFDIR not provided
+#define SYSCONFDIR
+#endif
+
+#include "config.c"
+
+static void execute_test(const char *input, const char *key, const char *expected)
+{
+	struct config *ctx;
+	const char *found;
+	char *buf;
+
+	ctx = calloc(1, sizeof(*ctx));
+	buf = strdup(input);
+	config_parse(ctx, buf);
+	free(buf);
+	found = config_get_value(ctx, key);
+	if (!expected)
+		assert(!found);
+	if (expected) {
+		assert(found);
+		assert(!strcmp(expected, found));
+	}
+	config_fini(ctx);
+}
+
+static void test_config_parse_basic(void)
+{
+	execute_test("tty = ttyS0", "tty", "ttyS0");
+}
+
+static void test_config_parse_no_key(void)
+{
+	execute_test("= ttyS0", "tty", NULL);
+}
+
+static void test_config_parse_no_value(void)
+{
+	execute_test("tty =", "tty", NULL);
+}
+
+static void test_config_parse_no_operator(void)
+{
+	execute_test("tty ttyS0", "tty", NULL);
+}
+
+static void test_config_parse_no_spaces(void)
+{
+	execute_test("tty=ttyS0", "tty", "ttyS0");
+}
+
+static void test_config_parse_empty(void)
+{
+	execute_test("", "tty", NULL);
+}
+
+int main(void)
+{
+	test_config_parse_basic();
+	test_config_parse_no_key();
+	test_config_parse_no_value();
+	test_config_parse_no_operator();
+	test_config_parse_no_spaces();
+	test_config_parse_empty();
+
+	return EXIT_SUCCESS;
+}