calyptia: resolve function pointer usage

Signed-off-by: Patrick Stephens <[email protected]>

plugins/custom_calyptia/calyptia.h

@@ -64,4 +64,11 @@ static flb_sds_t agent_config_filename(struct calyptia *ctx, char *fname);
 /* These are unique to the agent rather than the fleet */
 #define machine_id_fleet_config_filename(a) agent_config_filename((a), "machine-id")
 
+/* Function wrappers to enable mocking for unit test filesystem access */
+int (*flb_access)(const char *pathname, int mode);
+int (*flb_open)(const char *pathname, int flags, ...);
+ssize_t (*flb_write)(int fd, const void *buf, size_t count);
+int (*flb_close)(int fd);
+int (*flb_utils_read_file_wrapper)(char *path, char **out_buf, size_t *out_size);
+
 #endif /* FLB_CALYPTIA_H */

tests/runtime/custom_calyptia_input_test.c

@@ -6,6 +6,7 @@
 #include <fluent-bit/flb_custom_plugin.h>
 #include <fluent-bit/flb_mem.h>
 #include <fluent-bit/flb_str.h>
+#include <fluent-bit/flb_utils.h>
 #include "flb_tests_runtime.h"
 #include "../../plugins/custom_calyptia/calyptia.h"