tool_operate.c

        my_setopt_str(curl, CURLOPT_KEYPASSWD, config->key_passwd);

        if(built_in_protos & (CURLPROTO_SCP|CURLPROTO_SFTP)) {

          /* SSH and SSL private key uses same command-line option */
          /* new in libcurl 7.16.1 */
          my_setopt_str(curl, CURLOPT_SSH_PRIVATE_KEYFILE, config->key);
          /* new in libcurl 7.16.1 */
          my_setopt_str(curl, CURLOPT_SSH_PUBLIC_KEYFILE, config->pubkey);

          /* new in libcurl 7.17.1: SSH host key md5 checking allows us
             to fail if we are not talking to who we think we should */
          my_setopt_str(curl, CURLOPT_SSH_HOST_PUBLIC_KEY_MD5,
                        config->hostpubmd5);
        }

        if(config->cacert)
          my_setopt_str(curl, CURLOPT_CAINFO, config->cacert);
        if(config->capath)
          my_setopt_str(curl, CURLOPT_CAPATH, config->capath);
        if(config->crlfile)
          my_setopt_str(curl, CURLOPT_CRLFILE, config->crlfile);

        if(config->pinnedpubkey)
          my_setopt_str(curl, CURLOPT_PINNEDPUBLICKEY, config->pinnedpubkey);

        if(curlinfo->features & CURL_VERSION_SSL) {
          my_setopt_str(curl, CURLOPT_SSLCERT, config->cert);
          my_setopt_str(curl, CURLOPT_SSLCERTTYPE, config->cert_type);
          my_setopt_str(curl, CURLOPT_SSLKEY, config->key);
          my_setopt_str(curl, CURLOPT_SSLKEYTYPE, config->key_type);

          if(config->insecure_ok) {
            my_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0L);
            my_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0L);
          }
          else {
            my_setopt(curl, CURLOPT_SSL_VERIFYPEER, 1L);
            /* libcurl default is strict verifyhost -> 2L   */
            /* my_setopt(curl, CURLOPT_SSL_VERIFYHOST, 2L); */
          }

          if(config->verifystatus)
            my_setopt(curl, CURLOPT_SSL_VERIFYSTATUS, 1L);

          if(config->falsestart)
            my_setopt(curl, CURLOPT_SSL_FALSESTART, 1L);

          my_setopt_enum(curl, CURLOPT_SSLVERSION, config->ssl_version);
        }
        if(config->path_as_is)
          my_setopt(curl, CURLOPT_PATH_AS_IS, 1L);

        if(built_in_protos & (CURLPROTO_SCP|CURLPROTO_SFTP)) {
          if(!config->insecure_ok) {
            char *home;
            char *file;
            result = CURLE_OUT_OF_MEMORY;
            home = homedir();
            if(home) {
              file = aprintf("%s/%sssh/known_hosts", home, DOT_CHAR);
              if(file) {
                /* new in curl 7.19.6 */
                result = res_setopt_str(curl, CURLOPT_SSH_KNOWNHOSTS, file);
                curl_free(file);
                if(result == CURLE_UNKNOWN_OPTION)
                  /* libssh2 version older than 1.1.1 */
                  result = CURLE_OK;
              }
              Curl_safefree(home);
            }
            if(result)
              goto show_error;
          }
        }

        if(config->no_body || config->remote_time) {
          /* no body or use remote time */
          my_setopt(curl, CURLOPT_FILETIME, 1L);
        }

        my_setopt(curl, CURLOPT_CRLF, config->crlf?1L:0L);
        my_setopt_slist(curl, CURLOPT_QUOTE, config->quote);
        my_setopt_slist(curl, CURLOPT_POSTQUOTE, config->postquote);
        my_setopt_slist(curl, CURLOPT_PREQUOTE, config->prequote);

#if !defined(CURL_DISABLE_HTTP) && !defined(CURL_DISABLE_COOKIES)
        if(config->cookie)
          my_setopt_str(curl, CURLOPT_COOKIE, config->cookie);

        if(config->cookiefile)
          my_setopt_str(curl, CURLOPT_COOKIEFILE, config->cookiefile);

        /* new in libcurl 7.9 */
        if(config->cookiejar)
          my_setopt_str(curl, CURLOPT_COOKIEJAR, config->cookiejar);

        /* new in libcurl 7.9.7 */
        my_setopt(curl, CURLOPT_COOKIESESSION, config->cookiesession?1L:0L);
#else
        if(config->cookie || config->cookiefile || config->cookiejar) {
          warnf(config->global, "cookie option(s) used even though cookie "
                "support is disabled!\n");
          return CURLE_NOT_BUILT_IN;
        }
#endif

        my_setopt_enum(curl, CURLOPT_TIMECONDITION, (long)config->timecond);
        my_setopt(curl, CURLOPT_TIMEVALUE, (long)config->condtime);
        my_setopt_str(curl, CURLOPT_CUSTOMREQUEST, config->customrequest);
        customrequest_helper(config, config->httpreq, config->customrequest);
        my_setopt(curl, CURLOPT_STDERR, global->errors);

        /* three new ones in libcurl 7.3: */
        my_setopt_str(curl, CURLOPT_INTERFACE, config->iface);
        my_setopt_str(curl, CURLOPT_KRBLEVEL, config->krblevel);

        progressbarinit(&progressbar, config);
        if((global->progressmode == CURL_PROGRESS_BAR) &&
           !global->noprogress && !global->mute) {
          /* we want the alternative style, then we have to implement it
             ourselves! */
          my_setopt(curl, CURLOPT_XFERINFOFUNCTION, tool_progress_cb);
          my_setopt(curl, CURLOPT_XFERINFODATA, &progressbar);
        }

        /* new in libcurl 7.24.0: */
        if(config->dns_servers)
          my_setopt_str(curl, CURLOPT_DNS_SERVERS, config->dns_servers);

        /* new in libcurl 7.33.0: */
        if(config->dns_interface)
          my_setopt_str(curl, CURLOPT_DNS_INTERFACE, config->dns_interface);
        if(config->dns_ipv4_addr)
          my_setopt_str(curl, CURLOPT_DNS_LOCAL_IP4, config->dns_ipv4_addr);
        if(config->dns_ipv6_addr)
        my_setopt_str(curl, CURLOPT_DNS_LOCAL_IP6, config->dns_ipv6_addr);

        /* new in libcurl 7.6.2: */
        my_setopt_slist(curl, CURLOPT_TELNETOPTIONS, config->telnet_options);

        /* new in libcurl 7.7: */
        my_setopt_str(curl, CURLOPT_RANDOM_FILE, config->random_file);
        my_setopt_str(curl, CURLOPT_EGDSOCKET, config->egd_file);
        my_setopt(curl, CURLOPT_CONNECTTIMEOUT_MS,
                  (long)(config->connecttimeout * 1000));

        if(config->cipher_list)
          my_setopt_str(curl, CURLOPT_SSL_CIPHER_LIST, config->cipher_list);

        /* new in libcurl 7.9.2: */
        if(config->disable_epsv)
          /* disable it */
          my_setopt(curl, CURLOPT_FTP_USE_EPSV, 0L);

        /* new in libcurl 7.10.5 */
        if(config->disable_eprt)
          /* disable it */
          my_setopt(curl, CURLOPT_FTP_USE_EPRT, 0L);

        if(global->tracetype != TRACE_NONE) {
          my_setopt(curl, CURLOPT_DEBUGFUNCTION, tool_debug_cb);
          my_setopt(curl, CURLOPT_DEBUGDATA, config);
          my_setopt(curl, CURLOPT_VERBOSE, 1L);
        }

        /* new in curl 7.9.3 */
        if(config->engine) {
          result = res_setopt_str(curl, CURLOPT_SSLENGINE, config->engine);
          if(result)
            goto show_error;
          my_setopt(curl, CURLOPT_SSLENGINE_DEFAULT, 1L);
        }

        /* new in curl 7.10.7, extended in 7.19.4 but this only sets 0 or 1 */
        my_setopt(curl, CURLOPT_FTP_CREATE_MISSING_DIRS,
                  config->ftp_create_dirs?1L:0L);

        /* new in curl 7.10.8 */
        if(config->max_filesize)
          my_setopt(curl, CURLOPT_MAXFILESIZE_LARGE,
                    config->max_filesize);

        if(4 == config->ip_version)
          my_setopt(curl, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4);
        else if(6 == config->ip_version)
          my_setopt(curl, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V6);
        else
          my_setopt(curl, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_WHATEVER);

        /* new in curl 7.15.5 */
        if(config->ftp_ssl_reqd)
          my_setopt_enum(curl, CURLOPT_USE_SSL, (long)CURLUSESSL_ALL);

        /* new in curl 7.11.0 */
        else if(config->ftp_ssl)
          my_setopt_enum(curl, CURLOPT_USE_SSL, (long)CURLUSESSL_TRY);

        /* new in curl 7.16.0 */
        else if(config->ftp_ssl_control)
          my_setopt_enum(curl, CURLOPT_USE_SSL, (long)CURLUSESSL_CONTROL);

        /* new in curl 7.16.1 */
        if(config->ftp_ssl_ccc)
          my_setopt_enum(curl, CURLOPT_FTP_SSL_CCC,
                         (long)config->ftp_ssl_ccc_mode);

        /* new in curl 7.19.4 */
        if(config->socks5_gssapi_service)
          my_setopt_str(curl, CURLOPT_SOCKS5_GSSAPI_SERVICE,
                        config->socks5_gssapi_service);

        /* new in curl 7.19.4 */
        if(config->socks5_gssapi_nec)
          my_setopt_str(curl, CURLOPT_SOCKS5_GSSAPI_NEC,
                        config->socks5_gssapi_nec);

        /* new in curl 7.43.0 */
        if(config->proxy_service_name)
          my_setopt_str(curl, CURLOPT_PROXY_SERVICE_NAME,
                        config->proxy_service_name);

        /* new in curl 7.43.0 */
        if(config->service_name)
          my_setopt_str(curl, CURLOPT_SERVICE_NAME,
                        config->service_name);

        /* curl 7.13.0 */
        my_setopt_str(curl, CURLOPT_FTP_ACCOUNT, config->ftp_account);

        my_setopt(curl, CURLOPT_IGNORE_CONTENT_LENGTH, config->ignorecl?1L:0L);

        /* curl 7.14.2 */
        my_setopt(curl, CURLOPT_FTP_SKIP_PASV_IP, config->ftp_skip_ip?1L:0L);

        /* curl 7.15.1 */
        my_setopt(curl, CURLOPT_FTP_FILEMETHOD, (long)config->ftp_filemethod);

        /* curl 7.15.2 */
        if(config->localport) {
          my_setopt(curl, CURLOPT_LOCALPORT, (long)config->localport);
          my_setopt_str(curl, CURLOPT_LOCALPORTRANGE,
                        (long)config->localportrange);
        }

        /* curl 7.15.5 */
        my_setopt_str(curl, CURLOPT_FTP_ALTERNATIVE_TO_USER,
                      config->ftp_alternative_to_user);

        /* curl 7.16.0 */
        if(config->disable_sessionid)
          /* disable it */
          my_setopt(curl, CURLOPT_SSL_SESSIONID_CACHE, 0L);

        /* curl 7.16.2 */
        if(config->raw) {
          my_setopt(curl, CURLOPT_HTTP_CONTENT_DECODING, 0L);
          my_setopt(curl, CURLOPT_HTTP_TRANSFER_DECODING, 0L);
        }

        /* curl 7.17.1 */
        if(!config->nokeepalive) {
          my_setopt(curl, CURLOPT_TCP_KEEPALIVE, 1L);
          if(config->alivetime != 0) {
#if !defined(TCP_KEEPIDLE) || !defined(TCP_KEEPINTVL)
            warnf(config->global, "Keep-alive functionality somewhat crippled "
                "due to missing support in your operating system!\n");
#endif
            my_setopt(curl, CURLOPT_TCP_KEEPIDLE, config->alivetime);
            my_setopt(curl, CURLOPT_TCP_KEEPINTVL, config->alivetime);
          }
        }
        else
          my_setopt(curl, CURLOPT_TCP_KEEPALIVE, 0L);

        /* curl 7.20.0 */
        if(config->tftp_blksize)
          my_setopt(curl, CURLOPT_TFTP_BLKSIZE, config->tftp_blksize);

        if(config->mail_from)
          my_setopt_str(curl, CURLOPT_MAIL_FROM, config->mail_from);

        if(config->mail_rcpt)
          my_setopt_slist(curl, CURLOPT_MAIL_RCPT, config->mail_rcpt);

        /* curl 7.20.x */
        if(config->ftp_pret)
          my_setopt(curl, CURLOPT_FTP_USE_PRET, 1L);

        if(config->proto_present)
          my_setopt_flags(curl, CURLOPT_PROTOCOLS, config->proto);
        if(config->proto_redir_present)
          my_setopt_flags(curl, CURLOPT_REDIR_PROTOCOLS, config->proto_redir);

        if(config->content_disposition
           && (urlnode->flags & GETOUT_USEREMOTE)
           && (checkprefix("http://", this_url) ||
               checkprefix("https://", this_url)))
          hdrcbdata.honor_cd_filename = TRUE;
        else
          hdrcbdata.honor_cd_filename = FALSE;

        hdrcbdata.outs = &outs;
        hdrcbdata.heads = &heads;

        my_setopt(curl, CURLOPT_HEADERFUNCTION, tool_header_cb);
        my_setopt(curl, CURLOPT_HEADERDATA, &hdrcbdata);

        if(config->resolve)
          /* new in 7.21.3 */
          my_setopt_slist(curl, CURLOPT_RESOLVE, config->resolve);

        /* new in 7.21.4 */
        if(curlinfo->features & CURL_VERSION_TLSAUTH_SRP) {
          if(config->tls_username)
            my_setopt_str(curl, CURLOPT_TLSAUTH_USERNAME,
                          config->tls_username);
          if(config->tls_password)
            my_setopt_str(curl, CURLOPT_TLSAUTH_PASSWORD,
                          config->tls_password);
          if(config->tls_authtype)
            my_setopt_str(curl, CURLOPT_TLSAUTH_TYPE,
                          config->tls_authtype);
        }

        /* new in 7.22.0 */
        if(config->gssapi_delegation)
          my_setopt_str(curl, CURLOPT_GSSAPI_DELEGATION,
                        config->gssapi_delegation);

        /* new in 7.25.0 and 7.44.0 */
        {
          long mask = (config->ssl_allow_beast ? CURLSSLOPT_ALLOW_BEAST : 0) |
                      (config->ssl_no_revoke ? CURLSSLOPT_NO_REVOKE : 0);
          if(mask)
            my_setopt_bitmask(curl, CURLOPT_SSL_OPTIONS, mask);
        }

        if(config->mail_auth)
          my_setopt_str(curl, CURLOPT_MAIL_AUTH, config->mail_auth);

        /* new in 7.31.0 */
        if(config->sasl_ir)
          my_setopt(curl, CURLOPT_SASL_IR, 1L);

        if(config->nonpn) {
          my_setopt(curl, CURLOPT_SSL_ENABLE_NPN, 0L);
        }

        if(config->noalpn) {
          my_setopt(curl, CURLOPT_SSL_ENABLE_ALPN, 0L);
        }

        /* new in 7.40.0 */
        if(config->unix_socket_path)
          my_setopt_str(curl, CURLOPT_UNIX_SOCKET_PATH,
                        config->unix_socket_path);

        /* new in 7.45.0 */
        if(config->proto_default)
          my_setopt_str(curl, CURLOPT_DEFAULT_PROTOCOL, config->proto_default);

        /* initialize retry vars for loop below */
        retry_sleep_default = (config->retry_delay) ?
          config->retry_delay*1000L : RETRY_SLEEP_DEFAULT; /* ms */

        retry_numretries = config->req_retry;
        retry_sleep = retry_sleep_default; /* ms */
        retrystart = tvnow();

#ifndef CURL_DISABLE_LIBCURL_OPTION
        result = easysrc_perform();
        if(result) {
          goto show_error;
        }
#endif

        for(;;) {
#ifdef USE_METALINK
          if(!metalink && config->use_metalink) {
            /* If outs.metalink_parser is non-NULL, delete it first. */
            if(outs.metalink_parser)
              metalink_parser_context_delete(outs.metalink_parser);
            outs.metalink_parser = metalink_parser_context_new();
            if(outs.metalink_parser == NULL) {
              result = CURLE_OUT_OF_MEMORY;
              goto show_error;
            }
            fprintf(config->global->errors,
                    "Metalink: parsing (%s) metalink/XML...\n", this_url);
          }
          else if(metalink)
            fprintf(config->global->errors,
                    "Metalink: fetching (%s) from (%s)...\n",
                    mlfile->filename, this_url);
#endif /* USE_METALINK */

#ifdef CURLDEBUG
          if(config->test_event_based)
            result = curl_easy_perform_ev(curl);
          else
#endif
          result = curl_easy_perform(curl);

          if(!result && !outs.stream && !outs.bytes) {
            /* we have received no data despite the transfer was successful
               ==> force cration of an empty output file (if an output file
               was specified) */
            long cond_unmet = 0L;
            /* do not create (or even overwrite) the file in case we get no
               data because of unmet condition */
            curl_easy_getinfo(curl, CURLINFO_CONDITION_UNMET, &cond_unmet);
            if(!cond_unmet && !tool_create_output_file(&outs))
              result = CURLE_WRITE_ERROR;
          }

          if(outs.is_cd_filename && outs.stream && !global->mute &&
             outs.filename)
            printf("curl: Saved to filename '%s'\n", outs.filename);

          /* if retry-max-time is non-zero, make sure we haven't exceeded the
             time */
          if(retry_numretries &&
             (!config->retry_maxtime ||
              (tvdiff(tvnow(), retrystart) <
               config->retry_maxtime*1000L)) ) {
            enum {
              RETRY_NO,
              RETRY_TIMEOUT,
              RETRY_HTTP,
              RETRY_FTP,
              RETRY_LAST /* not used */
            } retry = RETRY_NO;
            long response;
            if((CURLE_OPERATION_TIMEDOUT == result) ||
               (CURLE_COULDNT_RESOLVE_HOST == result) ||
               (CURLE_COULDNT_RESOLVE_PROXY == result) ||
               (CURLE_FTP_ACCEPT_TIMEOUT == result))
              /* retry timeout always */
              retry = RETRY_TIMEOUT;
            else if((CURLE_OK == result) ||
                    (config->failonerror &&
                     (CURLE_HTTP_RETURNED_ERROR == result))) {
              /* If it returned OK. _or_ failonerror was enabled and it
                 returned due to such an error, check for HTTP transient
                 errors to retry on. */
              char *effective_url = NULL;
              curl_easy_getinfo(curl, CURLINFO_EFFECTIVE_URL, &effective_url);
              if(effective_url &&
                 checkprefix("http", effective_url)) {
                /* This was HTTP(S) */
                curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &response);

                switch(response) {
                case 500: /* Internal Server Error */
                case 502: /* Bad Gateway */
                case 503: /* Service Unavailable */
                case 504: /* Gateway Timeout */
                  retry = RETRY_HTTP;
                  /*
                   * At this point, we have already written data to the output
                   * file (or terminal). If we write to a file, we must rewind
                   * or close/re-open the file so that the next attempt starts
                   * over from the beginning.
                   *
                   * TODO: similar action for the upload case. We might need
                   * to start over reading from a previous point if we have
                   * uploaded something when this was returned.
                   */
                  break;
                }
              }
            } /* if CURLE_OK */
            else if(result) {
              curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &response);

              if(response/100 == 4)
                /*
                 * This is typically when the FTP server only allows a certain
                 * amount of users and we are not one of them.  All 4xx codes
                 * are transient.
                 */
                retry = RETRY_FTP;
            }

            if(retry) {
              static const char * const m[]={
                NULL, "timeout", "HTTP error", "FTP error"
              };

              warnf(config->global, "Transient problem: %s "
                    "Will retry in %ld seconds. "
                    "%ld retries left.\n",
                    m[retry], retry_sleep/1000L, retry_numretries);

              tool_go_sleep(retry_sleep);
              retry_numretries--;
              if(!config->retry_delay) {
                retry_sleep *= 2;
                if(retry_sleep > RETRY_SLEEP_MAX)
                  retry_sleep = RETRY_SLEEP_MAX;
              }
              if(outs.bytes && outs.filename && outs.stream) {
                /* We have written data to a output file, we truncate file
                 */
                if(!global->mute)
                  fprintf(global->errors, "Throwing away %"
                          CURL_FORMAT_CURL_OFF_T " bytes\n",
                          outs.bytes);
                fflush(outs.stream);
                /* truncate file at the position where we started appending */
#ifdef HAVE_FTRUNCATE
                if(ftruncate( fileno(outs.stream), outs.init)) {
                  /* when truncate fails, we can't just append as then we'll
                     create something strange, bail out */
                  if(!global->mute)
                    fprintf(global->errors,
                            "failed to truncate, exiting\n");
                  result = CURLE_WRITE_ERROR;
                  goto quit_urls;
                }
                /* now seek to the end of the file, the position where we
                   just truncated the file in a large file-safe way */
                fseek(outs.stream, 0, SEEK_END);
#else
                /* ftruncate is not available, so just reposition the file
                   to the location we would have truncated it. This won't
                   work properly with large files on 32-bit systems, but
                   most of those will have ftruncate. */
                fseek(outs.stream, (long)outs.init, SEEK_SET);
#endif
                outs.bytes = 0; /* clear for next round */
              }
              continue; /* curl_easy_perform loop */
            }
          } /* if retry_numretries */
          else if(metalink) {
            /* Metalink: Decide to try the next resource or
               not. Basically, we want to try the next resource if
               download was not successful. */
            long response;
            if(CURLE_OK == result) {
              /* TODO We want to try next resource when download was
                 not successful. How to know that? */
              char *effective_url = NULL;
              curl_easy_getinfo(curl, CURLINFO_EFFECTIVE_URL, &effective_url);
              if(effective_url &&
                 curlx_strnequal(effective_url, "http", 4)) {
                /* This was HTTP(S) */
                curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &response);
                if(response != 200 && response != 206) {
                  metalink_next_res = 1;
                  fprintf(global->errors,
                          "Metalink: fetching (%s) from (%s) FAILED "
                          "(HTTP status code %d)\n",
                          mlfile->filename, this_url, response);
                }
              }
            }
            else {
              metalink_next_res = 1;
              fprintf(global->errors,
                      "Metalink: fetching (%s) from (%s) FAILED (%s)\n",
                      mlfile->filename, this_url,
                      (errorbuffer[0]) ?
                      errorbuffer : curl_easy_strerror(result));
            }
          }
          if(metalink && !metalink_next_res)
            fprintf(global->errors, "Metalink: fetching (%s) from (%s) OK\n",
                    mlfile->filename, this_url);

          /* In all ordinary cases, just break out of loop here */
          break; /* curl_easy_perform loop */

        }

        if((global->progressmode == CURL_PROGRESS_BAR) &&
           progressbar.calls)
          /* if the custom progress bar has been displayed, we output a
             newline here */
          fputs("\n", progressbar.out);

        if(config->writeout)
          ourWriteOut(curl, &outs, config->writeout);

        if(config->writeenv)
          ourWriteEnv(curl);

        /*
        ** Code within this loop may jump directly here to label 'show_error'
        ** in order to display an error message for CURLcode stored in 'res'
        ** variable and exit loop once that necessary writing and cleanup
        ** in label 'quit_urls' has been done.
        */

        show_error:

#ifdef __VMS
        if(is_vms_shell()) {
          /* VMS DCL shell behavior */
          if(!global->showerror)
            vms_show = VMSSTS_HIDE;
        }
        else
#endif
        if(result && global->showerror) {
          fprintf(global->errors, "curl: (%d) %s\n", result, (errorbuffer[0]) ?
                  errorbuffer : curl_easy_strerror(result));
          if(result == CURLE_SSL_CACERT)
            fprintf(global->errors, "%s%s",
                    CURL_CA_CERT_ERRORMSG1, CURL_CA_CERT_ERRORMSG2);
        }

        /* Fall through comment to 'quit_urls' label */

        /*
        ** Upon error condition and always that a message has already been
        ** displayed, code within this loop may jump directly here to label
        ** 'quit_urls' otherwise it should jump to 'show_error' label above.
        **
        ** When 'res' variable is _not_ CURLE_OK loop will exit once that
        ** all code following 'quit_urls' has been executed. Otherwise it
        ** will loop to the beginning from where it may exit if there are
        ** no more urls left.
        */

        quit_urls:

        /* Set file extended attributes */
        if(!result && config->xattr && outs.fopened && outs.stream) {
          int rc = fwrite_xattr(curl, fileno(outs.stream));
          if(rc)
            warnf(config->global, "Error setting extended attributes: %s\n",
                  strerror(errno));
        }

        /* Close the file */
        if(outs.fopened && outs.stream) {
          int rc = fclose(outs.stream);
          if(!result && rc) {
            /* something went wrong in the writing process */
            result = CURLE_WRITE_ERROR;
            fprintf(global->errors, "(%d) Failed writing body\n", result);
          }
        }
        else if(!outs.s_isreg && outs.stream) {
          /* Dump standard stream buffered data */
          int rc = fflush(outs.stream);
          if(!result && rc) {
            /* something went wrong in the writing process */
            result = CURLE_WRITE_ERROR;
            fprintf(global->errors, "(%d) Failed writing body\n", result);
          }
        }

#ifdef __AMIGA__
        if(!result && outs.s_isreg && outs.filename) {
          /* Set the url (up to 80 chars) as comment for the file */
          if(strlen(url) > 78)
            url[79] = '\0';
          SetComment(outs.filename, url);
        }
#endif

#ifdef HAVE_UTIME
        /* File time can only be set _after_ the file has been closed */
        if(!result && config->remote_time && outs.s_isreg && outs.filename) {
          /* Ask libcurl if we got a remote file time */
          long filetime = -1;
          curl_easy_getinfo(curl, CURLINFO_FILETIME, &filetime);
          if(filetime >= 0) {
            struct utimbuf times;
            times.actime = (time_t)filetime;
            times.modtime = (time_t)filetime;
            utime(outs.filename, &times); /* set the time we got */
          }
        }
#endif

#ifdef USE_METALINK
        if(!metalink && config->use_metalink && result == CURLE_OK) {
          int rv = parse_metalink(config, &outs, this_url);
          if(rv == 0)
            fprintf(config->global->errors, "Metalink: parsing (%s) OK\n",
                    this_url);
          else if(rv == -1)
            fprintf(config->global->errors, "Metalink: parsing (%s) FAILED\n",
                    this_url);
        }
        else if(metalink && result == CURLE_OK && !metalink_next_res) {
          int rv = metalink_check_hash(global, mlfile, outs.filename);
          if(rv == 0) {
            metalink_next_res = 1;
          }
        }
#endif /* USE_METALINK */

        /* No more business with this output struct */
        if(outs.alloc_filename)
          Curl_safefree(outs.filename);
#ifdef USE_METALINK
        if(outs.metalink_parser)
          metalink_parser_context_delete(outs.metalink_parser);
#endif /* USE_METALINK */
        memset(&outs, 0, sizeof(struct OutStruct));
        hdrcbdata.outs = NULL;

        /* Free loop-local allocated memory and close loop-local opened fd */

        Curl_safefree(outfile);
        Curl_safefree(this_url);

        if(infdopen)
          close(infd);

        if(metalink) {
          /* Should exit if error is fatal. */
          if(is_fatal_error(result)) {
            break;
          }
          if(!metalink_next_res)
            break;
          mlres = mlres->next;
          if(mlres == NULL)
            /* TODO If metalink_next_res is 1 and mlres is NULL,
             * set res to error code
             */
            break;
        }
        else
        if(urlnum > 1) {
          /* when url globbing, exit loop upon critical error */
          if(is_fatal_error(result))
            break;
        }
        else if(result)
          /* when not url globbing, exit loop upon any error */
          break;

      } /* loop to the next URL */

      /* Free loop-local allocated memory */

      Curl_safefree(uploadfile);

      if(urls) {
        /* Free list of remaining URLs */
        glob_cleanup(urls);
        urls = NULL;
      }

      if(infilenum > 1) {
        /* when file globbing, exit loop upon critical error */
        if(is_fatal_error(result))
          break;
      }
      else if(result)
        /* when not file globbing, exit loop upon any error */
        break;

    } /* loop to the next globbed upload file */

    /* Free loop-local allocated memory */

    Curl_safefree(outfiles);

    if(inglob) {
      /* Free list of globbed upload files */
      glob_cleanup(inglob);
      inglob = NULL;
    }

    /* Free this URL node data without destroying the
       the node itself nor modifying next pointer. */
    Curl_safefree(urlnode->url);
    Curl_safefree(urlnode->outfile);
    Curl_safefree(urlnode->infile);
    urlnode->flags = 0;

    /*
    ** Bail out upon critical errors
    */
    if(is_fatal_error(result))
      goto quit_curl;

  } /* for-loop through all URLs */

  /*
  ** Nested loops end here.
  */

  quit_curl:

  /* Reset the global config variables */
  global->noprogress = orig_noprogress;
  global->isatty = orig_isatty;

  /* Free function-local referenced allocated memory */
  Curl_safefree(httpgetfields);

  /* Free list of given URLs */
  clean_getout(config);

  hdrcbdata.heads = NULL;

  /* Close function-local opened file descriptors */
  if(heads.fopened && heads.stream)
    fclose(heads.stream);

  if(heads.alloc_filename)
    Curl_safefree(heads.filename);

  /* Release metalink related resources here */
  clean_metalink(config);

  return result;
}

CURLcode operate(struct GlobalConfig *config, int argc, argv_item_t argv[])
{
  CURLcode result = CURLE_OK;

  /* Setup proper locale from environment */
#ifdef HAVE_SETLOCALE
  setlocale(LC_ALL, "");
#endif

  /* Parse .curlrc if necessary */
  if((argc == 1) || (!curlx_strequal(argv[1], "-q"))) {
    parseconfig(NULL, config); /* ignore possible failure */

    /* If we had no arguments then make sure a url was specified in .curlrc */
    if((argc < 2) && (!config->first->url_list)) {
      helpf(config->errors, NULL);
      result = CURLE_FAILED_INIT;
    }
  }

  if(!result) {
    /* Parse the command line arguments */
    ParameterError res = parse_args(config, argc, argv);
    if(res) {
      result = CURLE_OK;

      /* Check if we were asked for the help */
      if(res == PARAM_HELP_REQUESTED)
        tool_help();
      /* Check if we were asked for the manual */
      else if(res == PARAM_MANUAL_REQUESTED)
        hugehelp();
      /* Check if we were asked for the version information */
      else if(res == PARAM_VERSION_INFO_REQUESTED)
        tool_version_info();
      /* Check if we were asked to list the SSL engines */
      else if(res == PARAM_ENGINES_REQUESTED)
        tool_list_engines(config->easy);
      else if(res == PARAM_LIBCURL_UNSUPPORTED_PROTOCOL)
        result = CURLE_UNSUPPORTED_PROTOCOL;
      else
        result = CURLE_FAILED_INIT;
    }
    else {
#ifndef CURL_DISABLE_LIBCURL_OPTION
      /* Initialise the libcurl source output */
      result = easysrc_init();
#endif

      /* Perform the main operations */
      if(!result) {
        size_t count = 0;
        struct OperationConfig *operation = config->first;

        /* Get the required aguments for each operation */
        while(!result && operation) {
          result = get_args(operation, count++);

          operation = operation->next;
        }

        /* Set the current operation pointer */
        config->current = config->first;

        /* Perform each operation */
        while(!result && config->current) {
          result = operate_do(config, config->current);

          config->current = config->current->next;
        }

#ifndef CURL_DISABLE_LIBCURL_OPTION
        /* Cleanup the libcurl source output */
        easysrc_cleanup();

        /* Dump the libcurl code if previously enabled */
        dumpeasysrc(config);
#endif
      }
      else
        helpf(config->errors, "out of memory\n");
    }
  }

  return result;
}