source: vendor/current/examples/libsmbclient/testnotify.c

#include <sys/types.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <time.h>
#include <errno.h>
#include <libsmbclient.h>
#include <inttypes.h>
#include "get_auth_data_fn.h"

static int notify_cb(const struct smbc_notify_callback_action *actions,
                     size_t num_actions, void *private_data)
{
        int *count = private_data;
        size_t i;

        printf("%zu\n", num_actions);

        for (i=0; i<num_actions; i++) {
                const struct smbc_notify_callback_action *a = &actions[i];
                printf("%s: %"PRIu32"\n", a->filename, a->action);
        }

        *count -= 1;
        if (*count < 0) {
                return 1;
        }

        return 0;
}

int main(int argc, char * argv[])
{
        int             fd;
        int             ret;
        int             debug = 0;
        int             saved_errno;
        char            path[2048];
        char *          p;
        int count = 1000;

        smbc_init(get_auth_data_fn, debug);

        fprintf(stdout, "Path: ");
        *path = '\0';
        fgets(path, sizeof(path) - 1, stdin);
        if (strlen(path) == 0) {
                return 0;
        }

        p = path + strlen(path) - 1;
        if (*p == '\n') {
                *p = '\0';
        }

        fd = smbc_opendir(path);
        if (fd < 0) {
                perror("smbc_open");
                return 1;
        }

        ret = smbc_notify(fd, 1,
                          SMBC_NOTIFY_CHANGE_SECURITY|
                          SMBC_NOTIFY_CHANGE_FILE_NAME,
                          1000, notify_cb, &count);
        if (ret < 0) {
                saved_errno = errno;
        }

        smbc_close(fd);

        if (ret < 0) {
                errno = saved_errno;
                perror("notify");
        }

        return 0;
}