1/***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
9 *
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at https://curl.haxx.se/docs/copyright.html.
13 *
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
17 *
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
20 *
21 ***************************************************************************/
22#include "tool_setup.h"
23
24#define ENABLE_CURLX_PRINTF
25/* use our own printf() functions */
26#include "curlx.h"
27
28#include "tool_cfgable.h"
29#include "tool_cb_rea.h"
30#include "tool_operate.h"
31
32#include "memdebug.h" /* keep this as LAST include */
33
34/*
35** callback for CURLOPT_READFUNCTION
36*/
37
38size_t tool_read_cb(void *buffer, size_t sz, size_t nmemb, void *userdata)
39{
40 ssize_t rc;
41 struct InStruct *in = userdata;
42
43 rc = read(in->fd, buffer, sz*nmemb);
44 if(rc < 0) {
45 if(errno == EAGAIN) {
46 errno = 0;
47 in->config->readbusy = TRUE;
48 return CURL_READFUNC_PAUSE;
49 }
50 /* since size_t is unsigned we can't return negative values fine */
51 rc = 0;
52 }
53 in->config->readbusy = FALSE;
54 return (size_t)rc;
55}
56
57/*
58** callback for CURLOPT_XFERINFOFUNCTION used to unpause busy reads
59*/
60
61int tool_readbusy_cb(void *clientp,
62 curl_off_t dltotal, curl_off_t dlnow,
63 curl_off_t ultotal, curl_off_t ulnow)
64{
65 struct per_transfer *per = clientp;
66 struct OutStruct *outs = &per->outs;
67 struct OperationConfig *config = outs->config;
68
69 (void)dltotal; /* unused */
70 (void)dlnow; /* unused */
71 (void)ultotal; /* unused */
72 (void)ulnow; /* unused */
73
74 if(config->readbusy) {
75 config->readbusy = FALSE;
76 curl_easy_pause(per->curl, CURLPAUSE_CONT);
77 }
78
79 return per->noprogress? 0 : CURL_PROGRESSFUNC_CONTINUE;
80}
81