curl/docs/examples/ftpget.c
Viktor Szakats 95a882d268
build: fix -Wconversion/-Wsign-conversion warnings
Fix remaining warnings in examples and tests which are not suppressed
by the pragma in `lib/curl_setup.h`.

Silence a toolchain issue causing warnings in `FD_SET()` calls with
older Cygwin/MSYS2 builds. Likely fixed on 2020-08-03 by:
https://cygwin.com/git/?p=newlib-cygwin.git;a=commitdiff;h=5717262b8ecfed0f7fab63e2c09c78991e36f9dd

Follow-up to 2dbe75bd7f #12492

Closes #12557
2023-12-20 15:38:45 +00:00

95 lines
2.6 KiB
C

/***************************************************************************
* _ _ ____ _
* 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 <stdio.h>
#include <curl/curl.h>
/* <DESC>
* Get a single file from an FTP server.
* </DESC>
*/
struct FtpFile {
const char *filename;
FILE *stream;
};
static size_t my_fwrite(void *buffer, size_t size, size_t nmemb, void *stream)
{
struct FtpFile *out = (struct FtpFile *)stream;
if(!out->stream) {
/* open file for writing */
out->stream = fopen(out->filename, "wb");
if(!out->stream)
return 0; /* failure, cannot open file to write */
}
return fwrite(buffer, size, nmemb, out->stream);
}
int main(void)
{
CURL *curl;
CURLcode res;
struct FtpFile ftpfile = {
"curl.tar.gz", /* name to store the file as if successful */
NULL
};
curl_global_init(CURL_GLOBAL_DEFAULT);
curl = curl_easy_init();
if(curl) {
/*
* You better replace the URL with one that works!
*/
curl_easy_setopt(curl, CURLOPT_URL,
"ftp://ftp.example.com/curl/curl-7.9.2.tar.gz");
/* Define our callback to get called when there is data to be written */
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, my_fwrite);
/* Set a pointer to our struct to pass to the callback */
curl_easy_setopt(curl, CURLOPT_WRITEDATA, &ftpfile);
/* Switch on full protocol/debug output */
curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
res = curl_easy_perform(curl);
/* always cleanup */
curl_easy_cleanup(curl);
if(CURLE_OK != res) {
/* we failed */
fprintf(stderr, "curl told us %d\n", res);
}
}
if(ftpfile.stream)
fclose(ftpfile.stream); /* close the local file */
curl_global_cleanup();
return 0;
}