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- /***************************************************************************
- * _ _ ____ _
- * Project ___| | | | _ \| |
- * / __| | | | |_) | |
- * | (__| |_| | _ <| |___
- * \___|\___/|_| \_\_____|
- *
- * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
- *
- * This software is licensed as described in the file COPYING, which
- * you should have received as part of this distribution. The terms
- * are also available at https://curl.se/docs/copyright.html.
- *
- * You may opt to use, copy, modify, merge, publish, distribute and/or sell
- * copies of the Software, and permit persons to whom the Software is
- * furnished to do so, under the terms of the COPYING file.
- *
- * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
- * KIND, either express or implied.
- *
- * SPDX-License-Identifier: curl
- *
- ***************************************************************************/
- #include "tool_setup.h"
- #ifdef HAVE_SYS_SELECT_H
- #include <sys/select.h>
- #endif
- #define ENABLE_CURLX_PRINTF
- /* use our own printf() functions */
- #include "curlx.h"
- #include "tool_cfgable.h"
- #include "tool_cb_rea.h"
- #include "tool_operate.h"
- #include "tool_util.h"
- #include "memdebug.h" /* keep this as LAST include */
- /*
- ** callback for CURLOPT_READFUNCTION
- */
- size_t tool_read_cb(char *buffer, size_t sz, size_t nmemb, void *userdata)
- {
- ssize_t rc = 0;
- struct InStruct *in = userdata;
- struct OperationConfig *config = in->config;
- if(config->timeout_ms) {
- struct timeval now = tvnow();
- long msdelta = tvdiff(now, in->per->start);
- if(msdelta > config->timeout_ms)
- /* timeout */
- return 0;
- #ifndef WIN32
- /* this logic waits on read activity on a file descriptor that is not a
- socket which makes it not work with select() on Windows */
- else {
- fd_set bits;
- struct timeval timeout;
- long wait = config->timeout_ms - msdelta;
- /* wait this long at the most */
- timeout.tv_sec = wait/1000;
- timeout.tv_usec = (wait%1000)*1000;
- FD_ZERO(&bits);
- FD_SET(in->fd, &bits);
- if(!select(in->fd + 1, &bits, NULL, NULL, &timeout))
- return 0; /* timeout */
- }
- #endif
- }
- rc = read(in->fd, buffer, sz*nmemb);
- if(rc < 0) {
- if(errno == EAGAIN) {
- errno = 0;
- in->config->readbusy = TRUE;
- return CURL_READFUNC_PAUSE;
- }
- /* since size_t is unsigned we can't return negative values fine */
- rc = 0;
- }
- in->config->readbusy = FALSE;
- /* when select() rerturned zero here, it timed out */
- return (size_t)rc;
- }
- /*
- ** callback for CURLOPT_XFERINFOFUNCTION used to unpause busy reads
- */
- int tool_readbusy_cb(void *clientp,
- curl_off_t dltotal, curl_off_t dlnow,
- curl_off_t ultotal, curl_off_t ulnow)
- {
- struct per_transfer *per = clientp;
- struct OperationConfig *config = per->config;
- (void)dltotal; /* unused */
- (void)dlnow; /* unused */
- (void)ultotal; /* unused */
- (void)ulnow; /* unused */
- if(config->readbusy) {
- config->readbusy = FALSE;
- curl_easy_pause(per->curl, CURLPAUSE_CONT);
- }
- return per->noprogress? 0 : CURL_PROGRESSFUNC_CONTINUE;
- }
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