1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2012, 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
31 #include "memdebug.h" /* keep this as LAST include */
32
33 /*
34 ** callback for CURLOPT_READFUNCTION
35 */
36
tool_read_cb(void * buffer,size_t sz,size_t nmemb,void * userdata)37 size_t tool_read_cb(void *buffer, size_t sz, size_t nmemb, void *userdata)
38 {
39 ssize_t rc;
40 struct InStruct *in = userdata;
41
42 rc = read(in->fd, buffer, sz*nmemb);
43 if(rc < 0) {
44 if(errno == EAGAIN) {
45 errno = 0;
46 in->config->readbusy = TRUE;
47 return CURL_READFUNC_PAUSE;
48 }
49 /* since size_t is unsigned we can't return negative values fine */
50 rc = 0;
51 }
52 in->config->readbusy = FALSE;
53 return (size_t)rc;
54 }
55