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