1: /***************************************************************************
2: * _ _ ____ _
3: * Project ___| | | | _ \| |
4: * / __| | | | |_) | |
5: * | (__| |_| | _ <| |___
6: * \___|\___/|_| \_\_____|
7: *
8: * Copyright (C) 1998 - 2020, 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: #include <sys/stat.h>
25:
26: #ifdef HAVE_SIGNAL_H
27: #include <signal.h>
28: #endif
29:
30: #ifdef USE_NSS
31: #include <nspr.h>
32: #include <plarenas.h>
33: #endif
34:
35: #define ENABLE_CURLX_PRINTF
36: /* use our own printf() functions */
37: #include "curlx.h"
38:
39: #include "tool_cfgable.h"
40: #include "tool_convert.h"
41: #include "tool_doswin.h"
42: #include "tool_msgs.h"
43: #include "tool_operate.h"
44: #include "tool_panykey.h"
45: #include "tool_vms.h"
46: #include "tool_main.h"
47: #include "tool_libinfo.h"
48:
49: /*
50: * This is low-level hard-hacking memory leak tracking and similar. Using
51: * the library level code from this client-side is ugly, but we do this
52: * anyway for convenience.
53: */
54: #include "memdebug.h" /* keep this as LAST include */
55:
56: #ifdef __VMS
57: /*
58: * vms_show is a global variable, used in main() as parameter for
59: * function vms_special_exit() to allow proper curl tool exiting.
60: * Its value may be set in other tool_*.c source files thanks to
61: * forward declaration present in tool_vms.h
62: */
63: int vms_show = 0;
64: #endif
65:
66: #ifdef __MINGW32__
67: /*
68: * There seems to be no way to escape "*" in command-line arguments with MinGW
69: * when command-line argument globbing is enabled under the MSYS shell, so turn
70: * it off.
71: */
72: int _CRT_glob = 0;
73: #endif /* __MINGW32__ */
74:
75: /* if we build a static library for unit tests, there is no main() function */
76: #ifndef UNITTESTS
77:
78: /*
79: * Ensure that file descriptors 0, 1 and 2 (stdin, stdout, stderr) are
80: * open before starting to run. Otherwise, the first three network
81: * sockets opened by curl could be used for input sources, downloaded data
82: * or error logs as they will effectively be stdin, stdout and/or stderr.
83: */
84: static void main_checkfds(void)
85: {
86: #ifdef HAVE_PIPE
87: int fd[2] = { STDIN_FILENO, STDIN_FILENO };
88: while(fd[0] == STDIN_FILENO ||
89: fd[0] == STDOUT_FILENO ||
90: fd[0] == STDERR_FILENO ||
91: fd[1] == STDIN_FILENO ||
92: fd[1] == STDOUT_FILENO ||
93: fd[1] == STDERR_FILENO)
94: if(pipe(fd) < 0)
95: return; /* Out of handles. This isn't really a big problem now, but
96: will be when we try to create a socket later. */
97: close(fd[0]);
98: close(fd[1]);
99: #endif
100: }
101:
102: #ifdef CURLDEBUG
103: static void memory_tracking_init(void)
104: {
105: char *env;
106: /* if CURL_MEMDEBUG is set, this starts memory tracking message logging */
107: env = curlx_getenv("CURL_MEMDEBUG");
108: if(env) {
109: /* use the value as file name */
110: char fname[CURL_MT_LOGFNAME_BUFSIZE];
111: if(strlen(env) >= CURL_MT_LOGFNAME_BUFSIZE)
112: env[CURL_MT_LOGFNAME_BUFSIZE-1] = '\0';
113: strcpy(fname, env);
114: curl_free(env);
115: curl_dbg_memdebug(fname);
116: /* this weird stuff here is to make curl_free() get called before
117: curl_gdb_memdebug() as otherwise memory tracking will log a free()
118: without an alloc! */
119: }
120: /* if CURL_MEMLIMIT is set, this enables fail-on-alloc-number-N feature */
121: env = curlx_getenv("CURL_MEMLIMIT");
122: if(env) {
123: char *endptr;
124: long num = strtol(env, &endptr, 10);
125: if((endptr != env) && (endptr == env + strlen(env)) && (num > 0))
126: curl_dbg_memlimit(num);
127: curl_free(env);
128: }
129: }
130: #else
131: # define memory_tracking_init() Curl_nop_stmt
132: #endif
133:
134: /*
135: * This is the main global constructor for the app. Call this before
136: * _any_ libcurl usage. If this fails, *NO* libcurl functions may be
137: * used, or havoc may be the result.
138: */
139: static CURLcode main_init(struct GlobalConfig *config)
140: {
141: CURLcode result = CURLE_OK;
142:
143: #if defined(__DJGPP__) || defined(__GO32__)
144: /* stop stat() wasting time */
145: _djstat_flags |= _STAT_INODE | _STAT_EXEC_MAGIC | _STAT_DIRSIZE;
146: #endif
147:
148: /* Initialise the global config */
149: config->showerror = -1; /* Will show errors */
150: config->errors = stderr; /* Default errors to stderr */
151: config->styled_output = TRUE; /* enable detection */
152: config->parallel_max = PARALLEL_DEFAULT;
153:
154: /* Allocate the initial operate config */
155: config->first = config->last = malloc(sizeof(struct OperationConfig));
156: if(config->first) {
157: /* Perform the libcurl initialization */
158: result = curl_global_init(CURL_GLOBAL_DEFAULT);
159: if(!result) {
160: /* Get information about libcurl */
161: result = get_libcurl_info();
162:
163: if(!result) {
164: /* Initialise the config */
165: config_init(config->first);
166: config->first->global = config;
167: }
168: else {
169: errorf(config, "error retrieving curl library information\n");
170: free(config->first);
171: }
172: }
173: else {
174: errorf(config, "error initializing curl library\n");
175: free(config->first);
176: }
177: }
178: else {
179: errorf(config, "error initializing curl\n");
180: result = CURLE_FAILED_INIT;
181: }
182:
183: return result;
184: }
185:
186: static void free_globalconfig(struct GlobalConfig *config)
187: {
188: Curl_safefree(config->trace_dump);
189:
190: if(config->errors_fopened && config->errors)
191: fclose(config->errors);
192: config->errors = NULL;
193:
194: if(config->trace_fopened && config->trace_stream)
195: fclose(config->trace_stream);
196: config->trace_stream = NULL;
197:
198: Curl_safefree(config->libcurl);
199: }
200:
201: /*
202: * This is the main global destructor for the app. Call this after
203: * _all_ libcurl usage is done.
204: */
205: static void main_free(struct GlobalConfig *config)
206: {
207: /* Cleanup the easy handle */
208: /* Main cleanup */
209: curl_global_cleanup();
210: convert_cleanup();
211: metalink_cleanup();
212: #ifdef USE_NSS
213: if(PR_Initialized()) {
214: /* prevent valgrind from reporting still reachable mem from NSRP arenas */
215: PL_ArenaFinish();
216: /* prevent valgrind from reporting possibly lost memory (fd cache, ...) */
217: PR_Cleanup();
218: }
219: #endif
220: free_globalconfig(config);
221:
222: /* Free the config structures */
223: config_free(config->last);
224: config->first = NULL;
225: config->last = NULL;
226: }
227:
228: #ifdef WIN32
229: /* TerminalSettings for Windows */
230: static struct TerminalSettings {
231: HANDLE hStdOut;
232: DWORD dwOutputMode;
233: } TerminalSettings;
234:
235: static void configure_terminal(void)
236: {
237: /*
238: * If we're running Windows, enable VT output.
239: * Note: VT mode flag can be set on any version of Windows, but VT
240: * processing only performed on Win10 >= Creators Update)
241: */
242:
243: /* Define the VT flags in case we're building with an older SDK */
244: #ifndef ENABLE_VIRTUAL_TERMINAL_PROCESSING
245: #define ENABLE_VIRTUAL_TERMINAL_PROCESSING 0x0004
246: #endif
247:
248: memset(&TerminalSettings, 0, sizeof(TerminalSettings));
249:
250: /* Enable VT output */
251: TerminalSettings.hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
252: if((TerminalSettings.hStdOut != INVALID_HANDLE_VALUE)
253: && (GetConsoleMode(TerminalSettings.hStdOut,
254: &TerminalSettings.dwOutputMode))) {
255: SetConsoleMode(TerminalSettings.hStdOut,
256: TerminalSettings.dwOutputMode
257: | ENABLE_VIRTUAL_TERMINAL_PROCESSING);
258: }
259: }
260: #else
261: #define configure_terminal()
262: #endif
263:
264: static void restore_terminal(void)
265: {
266: #ifdef WIN32
267: /* Restore Console output mode and codepage to whatever they were
268: * when Curl started */
269: SetConsoleMode(TerminalSettings.hStdOut, TerminalSettings.dwOutputMode);
270: #endif
271: }
272:
273: /*
274: ** curl tool main function.
275: */
276: int main(int argc, char *argv[])
277: {
278: CURLcode result = CURLE_OK;
279: struct GlobalConfig global;
280: memset(&global, 0, sizeof(global));
281:
282: #ifdef WIN32
283: /* Undocumented diagnostic option to list the full paths of all loaded
284: modules. This is purposely pre-init. */
285: if(argc == 2 && !strcmp(argv[1], "--dump-module-paths")) {
286: struct curl_slist *item, *head = GetLoadedModulePaths();
287: for(item = head; item; item = item->next)
288: printf("%s\n", item->data);
289: curl_slist_free_all(head);
290: return head ? 0 : 1;
291: }
292: /* win32_init must be called before other init routines. */
293: result = win32_init();
294: if(result) {
295: fprintf(stderr, "curl: (%d) Windows-specific init failed.\n", result);
296: return result;
297: }
298: #endif
299:
300: /* Perform any platform-specific terminal configuration */
301: configure_terminal();
302:
303: main_checkfds();
304:
305: #if defined(HAVE_SIGNAL) && defined(SIGPIPE)
306: (void)signal(SIGPIPE, SIG_IGN);
307: #endif
308:
309: /* Initialize memory tracking */
310: memory_tracking_init();
311:
312: /* Initialize the curl library - do not call any libcurl functions before
313: this point */
314: result = main_init(&global);
315: if(!result) {
316: /* Start our curl operation */
317: result = operate(&global, argc, argv);
318:
319: #ifdef __SYMBIAN32__
320: if(global.showerror)
321: tool_pressanykey();
322: #endif
323:
324: /* Perform the main cleanup */
325: main_free(&global);
326: }
327:
328: /* Return the terminal to its original state */
329: restore_terminal();
330:
331: #ifdef __NOVELL_LIBC__
332: if(getenv("_IN_NETWARE_BASH_") == NULL)
333: tool_pressanykey();
334: #endif
335:
336: #ifdef __VMS
337: vms_special_exit(result, vms_show);
338: #else
339: return (int)result;
340: #endif
341: }
342:
343: #endif /* ndef UNITTESTS */
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