[331] | 1 | /***************************************************************************
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| 2 | * _ _ ____ _
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| 3 | * Project ___| | | | _ \| |
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| 4 | * / __| | | | |_) | |
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| 5 | * | (__| |_| | _ <| |___
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| 6 | * \___|\___/|_| \_\_____|
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| 7 | *
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| 8 | * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
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| 9 | *
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| 10 | * This software is licensed as described in the file COPYING, which
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| 11 | * you should have received as part of this distribution. The terms
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| 12 | * are also available at https://curl.haxx.se/docs/copyright.html.
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| 13 | *
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| 14 | * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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| 15 | * copies of the Software, and permit persons to whom the Software is
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| 16 | * furnished to do so, under the terms of the COPYING file.
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| 17 | *
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| 18 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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| 19 | * KIND, either express or implied.
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| 20 | *
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| 21 | ***************************************************************************/
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| 22 | #include "tool_setup.h"
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| 23 |
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| 24 | #include <sys/stat.h>
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| 25 |
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| 26 | #ifdef HAVE_SIGNAL_H
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| 27 | #include <signal.h>
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| 28 | #endif
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| 29 |
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| 30 | #ifdef USE_NSS
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| 31 | #include <nspr.h>
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| 32 | #include <plarenas.h>
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| 33 | #endif
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| 34 |
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| 35 | #define ENABLE_CURLX_PRINTF
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| 36 | /* use our own printf() functions */
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| 37 | #include "curlx.h"
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| 38 |
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| 39 | #include "tool_cfgable.h"
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| 40 | #include "tool_convert.h"
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| 41 | #include "tool_msgs.h"
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| 42 | #include "tool_operate.h"
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| 43 | #include "tool_panykey.h"
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| 44 | #include "tool_vms.h"
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| 45 | #include "tool_main.h"
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| 46 | #include "tool_libinfo.h"
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| 47 |
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| 48 | /*
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| 49 | * This is low-level hard-hacking memory leak tracking and similar. Using
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| 50 | * the library level code from this client-side is ugly, but we do this
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| 51 | * anyway for convenience.
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| 52 | */
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| 53 | #include "memdebug.h" /* keep this as LAST include */
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| 54 |
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| 55 | #ifdef __VMS
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| 56 | /*
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| 57 | * vms_show is a global variable, used in main() as parameter for
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| 58 | * function vms_special_exit() to allow proper curl tool exiting.
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| 59 | * Its value may be set in other tool_*.c source files thanks to
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| 60 | * forward declaration present in tool_vms.h
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| 61 | */
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| 62 | int vms_show = 0;
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| 63 | #endif
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| 64 |
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| 65 | #ifdef __MINGW32__
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| 66 | /*
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| 67 | * There seems to be no way to escape "*" in command-line arguments with MinGW
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| 68 | * when command-line argument globbing is enabled under the MSYS shell, so turn
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| 69 | * it off.
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| 70 | */
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| 71 | int _CRT_glob = 0;
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| 72 | #endif /* __MINGW32__ */
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| 73 |
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| 74 | /* if we build a static library for unit tests, there is no main() function */
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| 75 | #ifndef UNITTESTS
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| 76 |
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| 77 | /*
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| 78 | * Ensure that file descriptors 0, 1 and 2 (stdin, stdout, stderr) are
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| 79 | * open before starting to run. Otherwise, the first three network
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| 80 | * sockets opened by curl could be used for input sources, downloaded data
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| 81 | * or error logs as they will effectively be stdin, stdout and/or stderr.
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| 82 | */
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| 83 | static void main_checkfds(void)
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| 84 | {
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| 85 | #ifdef HAVE_PIPE
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| 86 | int fd[2] = { STDIN_FILENO, STDIN_FILENO };
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| 87 | while(fd[0] == STDIN_FILENO ||
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| 88 | fd[0] == STDOUT_FILENO ||
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| 89 | fd[0] == STDERR_FILENO ||
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| 90 | fd[1] == STDIN_FILENO ||
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| 91 | fd[1] == STDOUT_FILENO ||
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| 92 | fd[1] == STDERR_FILENO)
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| 93 | if(pipe(fd) < 0)
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| 94 | return; /* Out of handles. This isn't really a big problem now, but
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| 95 | will be when we try to create a socket later. */
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| 96 | close(fd[0]);
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| 97 | close(fd[1]);
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| 98 | #endif
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| 99 | }
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| 100 |
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| 101 | #ifdef CURLDEBUG
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| 102 | static void memory_tracking_init(void)
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| 103 | {
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| 104 | char *env;
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| 105 | /* if CURL_MEMDEBUG is set, this starts memory tracking message logging */
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| 106 | env = curlx_getenv("CURL_MEMDEBUG");
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| 107 | if(env) {
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| 108 | /* use the value as file name */
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| 109 | char fname[CURL_MT_LOGFNAME_BUFSIZE];
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| 110 | if(strlen(env) >= CURL_MT_LOGFNAME_BUFSIZE)
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| 111 | env[CURL_MT_LOGFNAME_BUFSIZE-1] = '\0';
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| 112 | strcpy(fname, env);
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| 113 | curl_free(env);
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| 114 | curl_memdebug(fname);
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| 115 | /* this weird stuff here is to make curl_free() get called
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| 116 | before curl_memdebug() as otherwise memory tracking will
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| 117 | log a free() without an alloc! */
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| 118 | }
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| 119 | /* if CURL_MEMLIMIT is set, this enables fail-on-alloc-number-N feature */
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| 120 | env = curlx_getenv("CURL_MEMLIMIT");
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| 121 | if(env) {
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| 122 | char *endptr;
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| 123 | long num = strtol(env, &endptr, 10);
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| 124 | if((endptr != env) && (endptr == env + strlen(env)) && (num > 0))
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| 125 | curl_memlimit(num);
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| 126 | curl_free(env);
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| 127 | }
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| 128 | }
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| 129 | #else
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| 130 | # define memory_tracking_init() Curl_nop_stmt
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| 131 | #endif
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| 132 |
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| 133 | /*
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| 134 | * This is the main global constructor for the app. Call this before
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| 135 | * _any_ libcurl usage. If this fails, *NO* libcurl functions may be
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| 136 | * used, or havoc may be the result.
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| 137 | */
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| 138 | static CURLcode main_init(struct GlobalConfig *config)
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| 139 | {
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| 140 | CURLcode result = CURLE_OK;
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| 141 |
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| 142 | #if defined(__DJGPP__) || defined(__GO32__)
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| 143 | /* stop stat() wasting time */
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| 144 | _djstat_flags |= _STAT_INODE | _STAT_EXEC_MAGIC | _STAT_DIRSIZE;
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| 145 | #endif
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| 146 |
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| 147 | /* Initialise the global config */
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| 148 | config->showerror = -1; /* Will show errors */
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| 149 | config->errors = stderr; /* Default errors to stderr */
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| 150 |
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| 151 | /* Allocate the initial operate config */
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| 152 | config->first = config->last = malloc(sizeof(struct OperationConfig));
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| 153 | if(config->first) {
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| 154 | /* Perform the libcurl initialization */
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| 155 | result = curl_global_init(CURL_GLOBAL_DEFAULT);
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| 156 | if(!result) {
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| 157 | /* Get information about libcurl */
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| 158 | result = get_libcurl_info();
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| 159 |
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| 160 | if(!result) {
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| 161 | /* Get a curl handle to use for all forthcoming curl transfers */
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| 162 | config->easy = curl_easy_init();
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| 163 | if(config->easy) {
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| 164 | /* Initialise the config */
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| 165 | config_init(config->first);
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| 166 | config->first->easy = config->easy;
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| 167 | config->first->global = config;
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| 168 | }
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| 169 | else {
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| 170 | helpf(stderr, "error initializing curl easy handle\n");
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| 171 | result = CURLE_FAILED_INIT;
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| 172 | free(config->first);
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| 173 | }
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| 174 | }
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| 175 | else {
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| 176 | helpf(stderr, "error retrieving curl library information\n");
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| 177 | free(config->first);
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| 178 | }
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| 179 | }
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| 180 | else {
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| 181 | helpf(stderr, "error initializing curl library\n");
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| 182 | free(config->first);
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| 183 | }
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| 184 | }
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| 185 | else {
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| 186 | helpf(stderr, "error initializing curl\n");
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| 187 | result = CURLE_FAILED_INIT;
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| 188 | }
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| 189 |
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| 190 | return result;
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| 191 | }
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| 192 |
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| 193 | static void free_config_fields(struct GlobalConfig *config)
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| 194 | {
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| 195 | Curl_safefree(config->trace_dump);
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| 196 |
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| 197 | if(config->errors_fopened && config->errors)
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| 198 | fclose(config->errors);
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| 199 | config->errors = NULL;
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| 200 |
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| 201 | if(config->trace_fopened && config->trace_stream)
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| 202 | fclose(config->trace_stream);
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| 203 | config->trace_stream = NULL;
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| 204 |
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| 205 | Curl_safefree(config->libcurl);
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| 206 | }
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| 207 |
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| 208 | /*
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| 209 | * This is the main global destructor for the app. Call this after
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| 210 | * _all_ libcurl usage is done.
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| 211 | */
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| 212 | static void main_free(struct GlobalConfig *config)
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| 213 | {
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| 214 | /* Cleanup the easy handle */
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| 215 | curl_easy_cleanup(config->easy);
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| 216 | config->easy = NULL;
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| 217 |
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| 218 | /* Main cleanup */
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| 219 | curl_global_cleanup();
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| 220 | convert_cleanup();
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| 221 | metalink_cleanup();
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| 222 | #ifdef USE_NSS
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| 223 | if(PR_Initialized()) {
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| 224 | /* prevent valgrind from reporting still reachable mem from NSRP arenas */
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| 225 | PL_ArenaFinish();
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| 226 | /* prevent valgrind from reporting possibly lost memory (fd cache, ...) */
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| 227 | PR_Cleanup();
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| 228 | }
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| 229 | #endif
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| 230 | free_config_fields(config);
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| 231 |
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| 232 | /* Free the config structures */
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| 233 | config_free(config->last);
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| 234 | config->first = NULL;
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| 235 | config->last = NULL;
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| 236 | }
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| 237 |
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| 238 | /*
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| 239 | ** curl tool main function.
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| 240 | */
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| 241 | int curl_main(int argc, char *argv[])
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| 242 | {
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| 243 | CURLcode result = CURLE_OK;
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| 244 | struct GlobalConfig global;
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| 245 | memset(&global, 0, sizeof(global));
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| 246 |
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| 247 | main_checkfds();
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| 248 |
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| 249 | #if defined(HAVE_SIGNAL) && defined(SIGPIPE)
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| 250 | (void)signal(SIGPIPE, SIG_IGN);
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| 251 | #endif
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| 252 |
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| 253 | /* Initialize memory tracking */
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| 254 | memory_tracking_init();
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| 255 |
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| 256 | /* Initialize the curl library - do not call any libcurl functions before
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| 257 | this point */
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| 258 | result = main_init(&global);
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| 259 | if(!result) {
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| 260 | /* Start our curl operation */
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| 261 | result = operate(&global, argc, argv);
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| 262 |
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| 263 | #ifdef __SYMBIAN32__
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| 264 | if(global.showerror)
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| 265 | tool_pressanykey();
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| 266 | #endif
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| 267 |
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| 268 | /* Perform the main cleanup */
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| 269 | main_free(&global);
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| 270 | }
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| 271 |
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| 272 | #ifdef __NOVELL_LIBC__
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| 273 | if(getenv("_IN_NETWARE_BASH_") == NULL)
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| 274 | tool_pressanykey();
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| 275 | #endif
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| 276 |
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| 277 | #ifdef __VMS
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| 278 | vms_special_exit(result, vms_show);
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| 279 | #else
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| 280 | return (int)result;
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| 281 | #endif
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| 282 | }
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| 283 |
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| 284 | #endif /* ndef UNITTESTS */
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