Update networking layer w/ CURL and emscripten impl
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Vendored
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/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at https://curl.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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* SPDX-License-Identifier: curl
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*
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***************************************************************************/
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#include "tool_setup.h"
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#ifdef _WIN32
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#include <tchar.h>
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#endif
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#ifndef UNDER_CE
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#include <signal.h>
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#endif
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#ifdef HAVE_FCNTL_H
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#include <fcntl.h>
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#endif
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#include "tool_cfgable.h"
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#include "tool_doswin.h"
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#include "tool_msgs.h"
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#include "tool_operate.h"
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#include "tool_vms.h"
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#include "tool_main.h"
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#include "tool_libinfo.h"
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#include "tool_stderr.h"
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/*
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* This is low-level hard-hacking memory leak tracking and similar. Using
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* the library level code from this client-side is ugly, but we do this
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* anyway for convenience.
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*/
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#include "memdebug.h" /* keep this as LAST include */
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#ifdef __VMS
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/*
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* vms_show is a global variable, used in main() as parameter for
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* function vms_special_exit() to allow proper curl tool exiting.
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* Its value may be set in other tool_*.c source files thanks to
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* forward declaration present in tool_vms.h
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*/
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int vms_show = 0;
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#endif
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#ifdef __AMIGA__
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#ifdef __GNUC__
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#define CURL_USED __attribute__((used))
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#else
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#define CURL_USED
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#endif
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static const char CURL_USED min_stack[] = "$STACK:16384";
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#endif
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#ifdef __MINGW32__
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/*
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* There seems to be no way to escape "*" in command-line arguments with MinGW
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* when command-line argument globbing is enabled under the MSYS shell, so turn
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* it off.
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*/
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extern int _CRT_glob;
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int _CRT_glob = 0;
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#endif /* __MINGW32__ */
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/* if we build a static library for unit tests, there is no main() function */
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#ifndef UNITTESTS
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#if defined(HAVE_PIPE) && defined(HAVE_FCNTL)
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/*
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* Ensure that file descriptors 0, 1 and 2 (stdin, stdout, stderr) are
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* open before starting to run. Otherwise, the first three network
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* sockets opened by curl could be used for input sources, downloaded data
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* or error logs as they will effectively be stdin, stdout and/or stderr.
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*
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* fcntl's F_GETFD instruction returns -1 if the file descriptor is closed,
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* otherwise it returns "the file descriptor flags (which typically can only
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* be FD_CLOEXEC, which is not set here).
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*/
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static int main_checkfds(void)
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{
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int fd[2];
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while((fcntl(STDIN_FILENO, F_GETFD) == -1) ||
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(fcntl(STDOUT_FILENO, F_GETFD) == -1) ||
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(fcntl(STDERR_FILENO, F_GETFD) == -1))
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if(pipe(fd))
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return 1;
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return 0;
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}
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#else
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#define main_checkfds() 0
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#endif
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#ifdef CURLDEBUG
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static void memory_tracking_init(void)
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{
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char *env;
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/* if CURL_MEMDEBUG is set, this starts memory tracking message logging */
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env = curl_getenv("CURL_MEMDEBUG");
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if(env) {
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/* use the value as filename */
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char fname[512];
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if(strlen(env) >= sizeof(fname))
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env[sizeof(fname)-1] = '\0';
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strcpy(fname, env);
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curl_free(env);
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curl_dbg_memdebug(fname);
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/* this weird stuff here is to make curl_free() get called before
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curl_dbg_memdebug() as otherwise memory tracking will log a free()
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without an alloc! */
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}
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/* if CURL_MEMLIMIT is set, this enables fail-on-alloc-number-N feature */
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env = curl_getenv("CURL_MEMLIMIT");
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if(env) {
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curl_off_t num;
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const char *p = env;
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if(!curlx_str_number(&p, &num, LONG_MAX))
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curl_dbg_memlimit((long)num);
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curl_free(env);
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}
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}
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#else
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# define memory_tracking_init() tool_nop_stmt
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#endif
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/*
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** curl tool main function.
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*/
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#if defined(_UNICODE) && !defined(UNDER_CE)
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#if defined(__GNUC__) || defined(__clang__)
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/* GCC does not know about wmain() */
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wmissing-prototypes"
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#pragma GCC diagnostic ignored "-Wmissing-declarations"
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#endif
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int wmain(int argc, wchar_t *argv[])
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#else
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int main(int argc, char *argv[])
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#endif
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{
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CURLcode result = CURLE_OK;
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tool_init_stderr();
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#if defined(_WIN32) && !defined(UNDER_CE)
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/* Undocumented diagnostic option to list the full paths of all loaded
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modules. This is purposely pre-init. */
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if(argc == 2 && !_tcscmp(argv[1], _T("--dump-module-paths"))) {
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struct curl_slist *item, *head = GetLoadedModulePaths();
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for(item = head; item; item = item->next)
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curl_mprintf("%s\n", item->data);
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curl_slist_free_all(head);
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return head ? 0 : 1;
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}
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#endif
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#ifdef _WIN32
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/* win32_init must be called before other init routines. */
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result = win32_init();
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if(result) {
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errorf("(%d) Windows-specific init failed", result);
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return (int)result;
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}
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#endif
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if(main_checkfds()) {
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errorf("out of file descriptors");
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return CURLE_FAILED_INIT;
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}
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#if defined(HAVE_SIGNAL) && defined(SIGPIPE)
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(void)signal(SIGPIPE, SIG_IGN);
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#endif
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/* Initialize memory tracking */
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memory_tracking_init();
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/* Initialize the curl library - do not call any libcurl functions before
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this point */
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result = globalconf_init();
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if(!result) {
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/* Start our curl operation */
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result = operate(argc, argv);
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/* Perform the main cleanup */
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globalconf_free();
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}
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#ifdef _WIN32
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/* Flush buffers of all streams opened in write or update mode */
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fflush(NULL);
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#endif
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#ifdef __VMS
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vms_special_exit(result, vms_show);
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#else
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return (int)result;
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#endif
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}
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#if defined(_UNICODE) && !defined(UNDER_CE)
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#if defined(__GNUC__) || defined(__clang__)
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#pragma GCC diagnostic pop
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#endif
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#endif
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#endif /* ndef UNITTESTS */
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