Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame] | 1 | /*************************************************************************** |
| 2 | * _ _ ____ _ |
| 3 | * Project ___| | | | _ \| | |
| 4 | * / __| | | | |_) | | |
| 5 | * | (__| |_| | _ <| |___ |
| 6 | * \___|\___/|_| \_\_____| |
| 7 | * |
Elliott Hughes | 82be86d | 2017-09-20 17:00:17 -0700 | [diff] [blame] | 8 | * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al. |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame] | 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 |
Alex Deymo | 8f1a214 | 2016-06-28 14:49:26 -0700 | [diff] [blame] | 12 | * are also available at https://curl.haxx.se/docs/copyright.html. |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame] | 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 | #define ENABLE_CURLX_PRINTF |
| 25 | /* use our own printf() functions */ |
| 26 | #include "curlx.h" |
| 27 | |
| 28 | #include "tool_cfgable.h" |
| 29 | #include "tool_msgs.h" |
| 30 | #include "tool_cb_wrt.h" |
| 31 | |
| 32 | #include "memdebug.h" /* keep this as LAST include */ |
| 33 | |
| 34 | /* create a local file for writing, return TRUE on success */ |
| 35 | bool tool_create_output_file(struct OutStruct *outs) |
| 36 | { |
| 37 | struct GlobalConfig *global = outs->config->global; |
| 38 | FILE *file; |
| 39 | |
| 40 | if(!outs->filename || !*outs->filename) { |
| 41 | warnf(global, "Remote filename has no length!\n"); |
| 42 | return FALSE; |
| 43 | } |
| 44 | |
| 45 | if(outs->is_cd_filename) { |
| 46 | /* don't overwrite existing files */ |
| 47 | file = fopen(outs->filename, "rb"); |
| 48 | if(file) { |
| 49 | fclose(file); |
| 50 | warnf(global, "Refusing to overwrite %s: %s\n", outs->filename, |
| 51 | strerror(EEXIST)); |
| 52 | return FALSE; |
| 53 | } |
| 54 | } |
| 55 | |
| 56 | /* open file for writing */ |
| 57 | file = fopen(outs->filename, "wb"); |
| 58 | if(!file) { |
| 59 | warnf(global, "Failed to create the file %s: %s\n", outs->filename, |
| 60 | strerror(errno)); |
| 61 | return FALSE; |
| 62 | } |
| 63 | outs->s_isreg = TRUE; |
| 64 | outs->fopened = TRUE; |
| 65 | outs->stream = file; |
| 66 | outs->bytes = 0; |
| 67 | outs->init = 0; |
| 68 | return TRUE; |
| 69 | } |
| 70 | |
| 71 | /* |
| 72 | ** callback for CURLOPT_WRITEFUNCTION |
| 73 | */ |
| 74 | |
Elliott Hughes | 82be86d | 2017-09-20 17:00:17 -0700 | [diff] [blame] | 75 | size_t tool_write_cb(char *buffer, size_t sz, size_t nmemb, void *userdata) |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame] | 76 | { |
| 77 | size_t rc; |
| 78 | struct OutStruct *outs = userdata; |
| 79 | struct OperationConfig *config = outs->config; |
Elliott Hughes | 82be86d | 2017-09-20 17:00:17 -0700 | [diff] [blame] | 80 | size_t bytes = sz * nmemb; |
| 81 | bool is_tty = config->global->isatty; |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame] | 82 | |
| 83 | /* |
| 84 | * Once that libcurl has called back tool_write_cb() the returned value |
| 85 | * is checked against the amount that was intended to be written, if |
| 86 | * it does not match then it fails with CURLE_WRITE_ERROR. So at this |
| 87 | * point returning a value different from sz*nmemb indicates failure. |
| 88 | */ |
Elliott Hughes | 82be86d | 2017-09-20 17:00:17 -0700 | [diff] [blame] | 89 | const size_t failure = bytes ? 0 : 1; |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame] | 90 | |
| 91 | #ifdef DEBUGBUILD |
Elliott Hughes | 82be86d | 2017-09-20 17:00:17 -0700 | [diff] [blame] | 92 | { |
| 93 | char *tty = curlx_getenv("CURL_ISATTY"); |
| 94 | if(tty) { |
| 95 | is_tty = TRUE; |
| 96 | curl_free(tty); |
| 97 | } |
| 98 | } |
| 99 | |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame] | 100 | if(config->include_headers) { |
Elliott Hughes | 82be86d | 2017-09-20 17:00:17 -0700 | [diff] [blame] | 101 | if(bytes > (size_t)CURL_MAX_HTTP_HEADER) { |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame] | 102 | warnf(config->global, "Header data size exceeds single call write " |
| 103 | "limit!\n"); |
| 104 | return failure; |
| 105 | } |
| 106 | } |
| 107 | else { |
Elliott Hughes | 82be86d | 2017-09-20 17:00:17 -0700 | [diff] [blame] | 108 | if(bytes > (size_t)CURL_MAX_WRITE_SIZE) { |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame] | 109 | warnf(config->global, "Data size exceeds single call write limit!\n"); |
| 110 | return failure; |
| 111 | } |
| 112 | } |
| 113 | |
| 114 | { |
| 115 | /* Some internal congruency checks on received OutStruct */ |
| 116 | bool check_fails = FALSE; |
| 117 | if(outs->filename) { |
| 118 | /* regular file */ |
| 119 | if(!*outs->filename) |
| 120 | check_fails = TRUE; |
| 121 | if(!outs->s_isreg) |
| 122 | check_fails = TRUE; |
| 123 | if(outs->fopened && !outs->stream) |
| 124 | check_fails = TRUE; |
| 125 | if(!outs->fopened && outs->stream) |
| 126 | check_fails = TRUE; |
| 127 | if(!outs->fopened && outs->bytes) |
| 128 | check_fails = TRUE; |
| 129 | } |
| 130 | else { |
| 131 | /* standard stream */ |
| 132 | if(!outs->stream || outs->s_isreg || outs->fopened) |
| 133 | check_fails = TRUE; |
| 134 | if(outs->alloc_filename || outs->is_cd_filename || outs->init) |
| 135 | check_fails = TRUE; |
| 136 | } |
| 137 | if(check_fails) { |
| 138 | warnf(config->global, "Invalid output struct data for write callback\n"); |
| 139 | return failure; |
| 140 | } |
| 141 | } |
| 142 | #endif |
| 143 | |
| 144 | if(!outs->stream && !tool_create_output_file(outs)) |
| 145 | return failure; |
| 146 | |
Elliott Hughes | 82be86d | 2017-09-20 17:00:17 -0700 | [diff] [blame] | 147 | if(is_tty && (outs->bytes < 2000) && !config->terminal_binary_ok) { |
| 148 | /* binary output to terminal? */ |
| 149 | if(memchr(buffer, 0, bytes)) { |
| 150 | warnf(config->global, "Binary output can mess up your terminal. " |
| 151 | "Use \"--output -\" to tell curl to output it to your terminal " |
| 152 | "anyway, or consider \"--output <FILE>\" to save to a file.\n"); |
| 153 | config->synthetic_error = ERR_BINARY_TERMINAL; |
| 154 | return failure; |
| 155 | } |
| 156 | } |
| 157 | |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame] | 158 | rc = fwrite(buffer, sz, nmemb, outs->stream); |
| 159 | |
Elliott Hughes | 82be86d | 2017-09-20 17:00:17 -0700 | [diff] [blame] | 160 | if(bytes == rc) |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame] | 161 | /* we added this amount of data to the output */ |
Elliott Hughes | 82be86d | 2017-09-20 17:00:17 -0700 | [diff] [blame] | 162 | outs->bytes += bytes; |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame] | 163 | |
| 164 | if(config->readbusy) { |
| 165 | config->readbusy = FALSE; |
| 166 | curl_easy_pause(config->easy, CURLPAUSE_CONT); |
| 167 | } |
| 168 | |
| 169 | if(config->nobuffer) { |
| 170 | /* output buffering disabled */ |
| 171 | int res = fflush(outs->stream); |
| 172 | if(res) |
| 173 | return failure; |
| 174 | } |
| 175 | |
| 176 | return rc; |
| 177 | } |