Add unit test for LITE file API

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

tests/lfile.c

@@ -0,0 +1,37 @@
+#include <stdio.h>
+#include "check.h"
+
+int main(void)
+{
+	int val;
+
+	val = fgetint("/etc/protocols", " \n\t", "udp");
+	if (val == -1) {
+		perror("Failed locating 'udp' protocol");
+		return 1;
+	}
+	printf("udp has proto %d\n", val);
+
+	val = fgetint("/etc/services", " /\n\t", "ftp");
+	if (val == -1) {
+		perror("Failed locating 'ftp' service");
+		return 1;
+	}
+	printf("ftp is inet port %d\n", val);
+
+	val = fgetint("/etc/group", "x:\n", "utmp");
+	if (val == -1) {
+		perror("Failed locating group 'utmp'");
+		return 1;
+	}
+	printf("utmp is gid %d\n", val);
+
+	val = fgetint("/etc/passwd", "x:\n", "nobody");
+	if (val == -1) {
+		perror("Failed locating user 'nobody'");
+		return 1;
+	}
+	printf("nobody is uid %d\n", val);
+
+	return 0;
+}