clone only git client using libgit2

gclone.c

//
// gclone.c
//   clone only git client using libgit2
//   ignores all cert errors - unsafe!
//   usage: glone <url> <path>
//   links:
//     sample clone: https://libgit2.github.com/docs/guides/101-samples/#repositories_clone_simple
//     based on examples/network/clone.c: https://github.com/libgit2/libgit2/blob/master/examples/network/clone.c
//   license: public domain
//

#include <git2.h>
#include <git2/clone.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <pthread.h>
#include <unistd.h>

static int accept_cert();

int main(int argc, char **argv)
{
        if(argc != 3){
                printf("usage: gclone <url> <path>\n");
                return(1);
        }
        git_libgit2_init();
        git_repository *repo;
        int cloneerr = 0;
        char *url = argv[1];
        char *path = argv[2];
        git_clone_options cloneopts = GIT_CLONE_OPTIONS_INIT;
        git_checkout_options checkoutopts = GIT_CHECKOUT_OPTIONS_INIT;
        checkoutopts.checkout_strategy = GIT_CHECKOUT_SAFE;
        cloneopts.checkout_opts = checkoutopts;
        cloneopts.fetch_opts.callbacks.certificate_check = accept_cert;
        printf("cloning %s into %s... ", url, path);
        cloneerr = git_clone(&repo, url, path, &cloneopts);
        if(cloneerr != 0){
                const git_error *gerr = giterr_last();
                if(gerr){
                        printf("ERROR %d: %s\n", gerr->klass, gerr->message);
                }else{
                        printf("ERROR %d: no detailed info\n", cloneerr);
                }
        }else{
                printf("done\n");
                if(repo){
                        git_repository_free(repo);
                }
        }
        git_libgit2_shutdown();
        return(0);
}

static int accept_cert(git_cert *cert, int valid, const char* host, void *payload)
{
        return(1);
}