src/write_http.c

   1 /**
   2  * collectd - src/write_http.c
   3  * Copyright (C) 2009       Paul Sadauskas
   4  * Copyright (C) 2009       Doug MacEachern
   5  * Copyright (C) 2007-2014  Florian octo Forster
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the
   9  * Free Software Foundation; only version 2 of the License is applicable.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  19  *
  20  * Authors:
  21  *   Florian octo Forster <octo at collectd.org>
  22  *   Doug MacEachern <dougm@hyperic.com>
  23  *   Paul Sadauskas <psadauskas@gmail.com>
  24  **/
  25
  26 #include "collectd.h"
  27 #include "plugin.h"
  28 #include "common.h"
  29 #include "utils_cache.h"
  30 #include "utils_format_json.h"
  31
  32 #if HAVE_PTHREAD_H
  33 # include <pthread.h>
  34 #endif
  35
  36 #include <curl/curl.h>
  37
  38 #ifndef WRITE_HTTP_DEFAULT_BUFFER_SIZE
  39 # define WRITE_HTTP_DEFAULT_BUFFER_SIZE 4096
  40 #endif
  41
  42 /*
  43  * Private variables
  44  */
  45 struct wh_callback_s
  46 {
  47         char *location;
  48
  49         char *user;
  50         char *pass;
  51         char *credentials;
  52         _Bool verify_peer;
  53         _Bool verify_host;
  54         char *cacert;
  55         char *capath;
  56         char *clientkey;
  57         char *clientcert;
  58         char *clientkeypass;
  59         long sslversion;
  60         _Bool store_rates;
  61
  62 #define WH_FORMAT_COMMAND 0
  63 #define WH_FORMAT_JSON    1
  64         int format;
  65
  66         CURL *curl;
  67         char curl_errbuf[CURL_ERROR_SIZE];
  68
  69         char  *send_buffer;
  70         size_t send_buffer_size;
  71         size_t send_buffer_free;
  72         size_t send_buffer_fill;
  73         cdtime_t send_buffer_init_time;
  74
  75         pthread_mutex_t send_lock;
  76 };
  77 typedef struct wh_callback_s wh_callback_t;
  78
  79 static void wh_reset_buffer (wh_callback_t *cb)  /* {{{ */
  80 {
  81         memset (cb->send_buffer, 0, cb->send_buffer_size);
  82         cb->send_buffer_free = cb->send_buffer_size;
  83         cb->send_buffer_fill = 0;
  84         cb->send_buffer_init_time = cdtime ();
  85
  86         if (cb->format == WH_FORMAT_JSON)
  87         {
  88                 format_json_initialize (cb->send_buffer,
  89                                 &cb->send_buffer_fill,
  90                                 &cb->send_buffer_free);
  91         }
  92 } /* }}} wh_reset_buffer */
  93
  94 static int wh_send_buffer (wh_callback_t *cb) /* {{{ */
  95 {
  96         int status = 0;
  97
  98         curl_easy_setopt (cb->curl, CURLOPT_POSTFIELDS, cb->send_buffer);
  99         status = curl_easy_perform (cb->curl);
 100         if (status != CURLE_OK)
 101         {
 102                 ERROR ("write_http plugin: curl_easy_perform failed with "
 103                                 "status %i: %s",
 104                                 status, cb->curl_errbuf);
 105         }
 106         return (status);
 107 } /* }}} wh_send_buffer */
 108
 109 static int wh_callback_init (wh_callback_t *cb) /* {{{ */
 110 {
 111         struct curl_slist *headers;
 112
 113         if (cb->curl != NULL)
 114                 return (0);
 115
 116         cb->curl = curl_easy_init ();
 117         if (cb->curl == NULL)
 118         {
 119                 ERROR ("curl plugin: curl_easy_init failed.");
 120                 return (-1);
 121         }
 122
 123         curl_easy_setopt (cb->curl, CURLOPT_NOSIGNAL, 1L);
 124         curl_easy_setopt (cb->curl, CURLOPT_USERAGENT, COLLECTD_USERAGENT);
 125
 126         headers = NULL;
 127         headers = curl_slist_append (headers, "Accept:  */*");
 128         if (cb->format == WH_FORMAT_JSON)
 129                 headers = curl_slist_append (headers, "Content-Type: application/json");
 130         else
 131                 headers = curl_slist_append (headers, "Content-Type: text/plain");
 132         headers = curl_slist_append (headers, "Expect:");
 133         curl_easy_setopt (cb->curl, CURLOPT_HTTPHEADER, headers);
 134
 135         curl_easy_setopt (cb->curl, CURLOPT_ERRORBUFFER, cb->curl_errbuf);
 136         curl_easy_setopt (cb->curl, CURLOPT_URL, cb->location);
 137         curl_easy_setopt (cb->curl, CURLOPT_FOLLOWLOCATION, 1L);
 138         curl_easy_setopt (cb->curl, CURLOPT_MAXREDIRS, 50L);
 139
 140         if (cb->user != NULL)
 141         {
 142                 size_t credentials_size;
 143
 144                 credentials_size = strlen (cb->user) + 2;
 145                 if (cb->pass != NULL)
 146                         credentials_size += strlen (cb->pass);
 147
 148                 cb->credentials = (char *) malloc (credentials_size);
 149                 if (cb->credentials == NULL)
 150                 {
 151                         ERROR ("curl plugin: malloc failed.");
 152                         return (-1);
 153                 }
 154
 155                 ssnprintf (cb->credentials, credentials_size, "%s:%s",
 156                                 cb->user, (cb->pass == NULL) ? "" : cb->pass);
 157                 curl_easy_setopt (cb->curl, CURLOPT_USERPWD, cb->credentials);
 158                 curl_easy_setopt (cb->curl, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
 159         }
 160
 161         curl_easy_setopt (cb->curl, CURLOPT_SSL_VERIFYPEER, (long) cb->verify_peer);
 162         curl_easy_setopt (cb->curl, CURLOPT_SSL_VERIFYHOST,
 163                         cb->verify_host ? 2L : 0L);
 164         curl_easy_setopt (cb->curl, CURLOPT_SSLVERSION, cb->sslversion);
 165         if (cb->cacert != NULL)
 166                 curl_easy_setopt (cb->curl, CURLOPT_CAINFO, cb->cacert);
 167         if (cb->capath != NULL)
 168                 curl_easy_setopt (cb->curl, CURLOPT_CAPATH, cb->capath);
 169
 170         if (cb->clientkey != NULL && cb->clientcert != NULL)
 171         {
 172             curl_easy_setopt (cb->curl, CURLOPT_SSLKEY, cb->clientkey);
 173             curl_easy_setopt (cb->curl, CURLOPT_SSLCERT, cb->clientcert);
 174
 175             if (cb->clientkeypass != NULL)
 176                 curl_easy_setopt (cb->curl, CURLOPT_SSLKEYPASSWD, cb->clientkeypass);
 177         }
 178
 179         wh_reset_buffer (cb);
 180
 181         return (0);
 182 } /* }}} int wh_callback_init */
 183
 184 static int wh_flush_nolock (cdtime_t timeout, wh_callback_t *cb) /* {{{ */
 185 {
 186         int status;
 187
 188         DEBUG ("write_http plugin: wh_flush_nolock: timeout = %.3f; "
 189                         "send_buffer_fill = %zu;",
 190                         CDTIME_T_TO_DOUBLE (timeout),
 191                         cb->send_buffer_fill);
 192
 193         /* timeout == 0  => flush unconditionally */
 194         if (timeout > 0)
 195         {
 196                 cdtime_t now;
 197
 198                 now = cdtime ();
 199                 if ((cb->send_buffer_init_time + timeout) > now)
 200                         return (0);
 201         }
 202
 203         if (cb->format == WH_FORMAT_COMMAND)
 204         {
 205                 if (cb->send_buffer_fill <= 0)
 206                 {
 207                         cb->send_buffer_init_time = cdtime ();
 208                         return (0);
 209                 }
 210
 211                 status = wh_send_buffer (cb);
 212                 wh_reset_buffer (cb);
 213         }
 214         else if (cb->format == WH_FORMAT_JSON)
 215         {
 216                 if (cb->send_buffer_fill <= 2)
 217                 {
 218                         cb->send_buffer_init_time = cdtime ();
 219                         return (0);
 220                 }
 221
 222                 status = format_json_finalize (cb->send_buffer,
 223                                 &cb->send_buffer_fill,
 224                                 &cb->send_buffer_free);
 225                 if (status != 0)
 226                 {
 227                         ERROR ("write_http: wh_flush_nolock: "
 228                                         "format_json_finalize failed.");
 229                         wh_reset_buffer (cb);
 230                         return (status);
 231                 }
 232
 233                 status = wh_send_buffer (cb);
 234                 wh_reset_buffer (cb);
 235         }
 236         else
 237         {
 238                 ERROR ("write_http: wh_flush_nolock: "
 239                                 "Unknown format: %i",
 240                                 cb->format);
 241                 return (-1);
 242         }
 243
 244         return (status);
 245 } /* }}} wh_flush_nolock */
 246
 247 static int wh_flush (cdtime_t timeout, /* {{{ */
 248                 const char *identifier __attribute__((unused)),
 249                 user_data_t *user_data)
 250 {
 251         wh_callback_t *cb;
 252         int status;
 253
 254         if (user_data == NULL)
 255                 return (-EINVAL);
 256
 257         cb = user_data->data;
 258
 259         pthread_mutex_lock (&cb->send_lock);
 260
 261         if (cb->curl == NULL)
 262         {
 263                 status = wh_callback_init (cb);
 264                 if (status != 0)
 265                 {
 266                         ERROR ("write_http plugin: wh_callback_init failed.");
 267                         pthread_mutex_unlock (&cb->send_lock);
 268                         return (-1);
 269                 }
 270         }
 271
 272         status = wh_flush_nolock (timeout, cb);
 273         pthread_mutex_unlock (&cb->send_lock);
 274
 275         return (status);
 276 } /* }}} int wh_flush */
 277
 278 static void wh_callback_free (void *data) /* {{{ */
 279 {
 280         wh_callback_t *cb;
 281
 282         if (data == NULL)
 283                 return;
 284
 285         cb = data;
 286
 287         wh_flush_nolock (/* timeout = */ 0, cb);
 288
 289         if (cb->curl != NULL)
 290         {
 291                 curl_easy_cleanup (cb->curl);
 292                 cb->curl = NULL;
 293         }
 294         sfree (cb->location);
 295         sfree (cb->user);
 296         sfree (cb->pass);
 297         sfree (cb->credentials);
 298         sfree (cb->cacert);
 299         sfree (cb->capath);
 300         sfree (cb->clientkey);
 301         sfree (cb->clientcert);
 302         sfree (cb->clientkeypass);
 303         sfree (cb->send_buffer);
 304
 305         sfree (cb);
 306 } /* }}} void wh_callback_free */
 307
 308 static int wh_write_command (const data_set_t *ds, const value_list_t *vl, /* {{{ */
 309                 wh_callback_t *cb)
 310 {
 311         char key[10*DATA_MAX_NAME_LEN];
 312         char values[512];
 313         char command[1024];
 314         size_t command_len;
 315
 316         int status;
 317
 318         if (0 != strcmp (ds->type, vl->type)) {
 319                 ERROR ("write_http plugin: DS type does not match "
 320                                 "value list type");
 321                 return -1;
 322         }
 323
 324         /* Copy the identifier to `key' and escape it. */
 325         status = FORMAT_VL (key, sizeof (key), vl);
 326         if (status != 0) {
 327                 ERROR ("write_http plugin: error with format_name");
 328                 return (status);
 329         }
 330         escape_string (key, sizeof (key));
 331
 332         /* Convert the values to an ASCII representation and put that into
 333          * `values'. */
 334         status = format_values (values, sizeof (values), ds, vl, cb->store_rates);
 335         if (status != 0) {
 336                 ERROR ("write_http plugin: error with "
 337                                 "wh_value_list_to_string");
 338                 return (status);
 339         }
 340
 341         command_len = (size_t) ssnprintf (command, sizeof (command),
 342                         "PUTVAL %s interval=%.3f %s\r\n",
 343                         key,
 344                         CDTIME_T_TO_DOUBLE (vl->interval),
 345                         values);
 346         if (command_len >= sizeof (command)) {
 347                 ERROR ("write_http plugin: Command buffer too small: "
 348                                 "Need %zu bytes.", command_len + 1);
 349                 return (-1);
 350         }
 351
 352         pthread_mutex_lock (&cb->send_lock);
 353
 354         if (cb->curl == NULL)
 355         {
 356                 status = wh_callback_init (cb);
 357                 if (status != 0)
 358                 {
 359                         ERROR ("write_http plugin: wh_callback_init failed.");
 360                         pthread_mutex_unlock (&cb->send_lock);
 361                         return (-1);
 362                 }
 363         }
 364
 365         if (command_len >= cb->send_buffer_free)
 366         {
 367                 status = wh_flush_nolock (/* timeout = */ 0, cb);
 368                 if (status != 0)
 369                 {
 370                         pthread_mutex_unlock (&cb->send_lock);
 371                         return (status);
 372                 }
 373         }
 374         assert (command_len < cb->send_buffer_free);
 375
 376         /* `command_len + 1' because `command_len' does not include the
 377          * trailing null byte. Neither does `send_buffer_fill'. */
 378         memcpy (cb->send_buffer + cb->send_buffer_fill,
 379                         command, command_len + 1);
 380         cb->send_buffer_fill += command_len;
 381         cb->send_buffer_free -= command_len;
 382
 383         DEBUG ("write_http plugin: <%s> buffer %zu/%zu (%g%%) \"%s\"",
 384                         cb->location,
 385                         cb->send_buffer_fill, cb->send_buffer_size,
 386                         100.0 * ((double) cb->send_buffer_fill) / ((double) cb->send_buffer_size),
 387                         command);
 388
 389         /* Check if we have enough space for this command. */
 390         pthread_mutex_unlock (&cb->send_lock);
 391
 392         return (0);
 393 } /* }}} int wh_write_command */
 394
 395 static int wh_write_json (const data_set_t *ds, const value_list_t *vl, /* {{{ */
 396                 wh_callback_t *cb)
 397 {
 398         int status;
 399
 400         pthread_mutex_lock (&cb->send_lock);
 401
 402         if (cb->curl == NULL)
 403         {
 404                 status = wh_callback_init (cb);
 405                 if (status != 0)
 406                 {
 407                         ERROR ("write_http plugin: wh_callback_init failed.");
 408                         pthread_mutex_unlock (&cb->send_lock);
 409                         return (-1);
 410                 }
 411         }
 412
 413         status = format_json_value_list (cb->send_buffer,
 414                         &cb->send_buffer_fill,
 415                         &cb->send_buffer_free,
 416                         ds, vl, cb->store_rates);
 417         if (status == (-ENOMEM))
 418         {
 419                 status = wh_flush_nolock (/* timeout = */ 0, cb);
 420                 if (status != 0)
 421                 {
 422                         wh_reset_buffer (cb);
 423                         pthread_mutex_unlock (&cb->send_lock);
 424                         return (status);
 425                 }
 426
 427                 status = format_json_value_list (cb->send_buffer,
 428                                 &cb->send_buffer_fill,
 429                                 &cb->send_buffer_free,
 430                                 ds, vl, cb->store_rates);
 431         }
 432         if (status != 0)
 433         {
 434                 pthread_mutex_unlock (&cb->send_lock);
 435                 return (status);
 436         }
 437
 438         DEBUG ("write_http plugin: <%s> buffer %zu/%zu (%g%%)",
 439                         cb->location,
 440                         cb->send_buffer_fill, cb->send_buffer_size,
 441                         100.0 * ((double) cb->send_buffer_fill) / ((double) cb->send_buffer_size));
 442
 443         /* Check if we have enough space for this command. */
 444         pthread_mutex_unlock (&cb->send_lock);
 445
 446         return (0);
 447 } /* }}} int wh_write_json */
 448
 449 static int wh_write (const data_set_t *ds, const value_list_t *vl, /* {{{ */
 450                 user_data_t *user_data)
 451 {
 452         wh_callback_t *cb;
 453         int status;
 454
 455         if (user_data == NULL)
 456                 return (-EINVAL);
 457
 458         cb = user_data->data;
 459
 460         if (cb->format == WH_FORMAT_JSON)
 461                 status = wh_write_json (ds, vl, cb);
 462         else
 463                 status = wh_write_command (ds, vl, cb);
 464
 465         return (status);
 466 } /* }}} int wh_write */
 467
 468 static int config_set_format (wh_callback_t *cb, /* {{{ */
 469                 oconfig_item_t *ci)
 470 {
 471         char *string;
 472
 473         if ((ci->values_num != 1)
 474                         || (ci->values[0].type != OCONFIG_TYPE_STRING))
 475         {
 476                 WARNING ("write_http plugin: The `%s' config option "
 477                                 "needs exactly one string argument.", ci->key);
 478                 return (-1);
 479         }
 480
 481         string = ci->values[0].value.string;
 482         if (strcasecmp ("Command", string) == 0)
 483                 cb->format = WH_FORMAT_COMMAND;
 484         else if (strcasecmp ("JSON", string) == 0)
 485                 cb->format = WH_FORMAT_JSON;
 486         else
 487         {
 488                 ERROR ("write_http plugin: Invalid format string: %s",
 489                                 string);
 490                 return (-1);
 491         }
 492
 493         return (0);
 494 } /* }}} int config_set_format */
 495
 496 static int wh_config_url (oconfig_item_t *ci) /* {{{ */
 497 {
 498         wh_callback_t *cb;
 499         int buffer_size = 0;
 500         user_data_t user_data;
 501         int i;
 502
 503         cb = malloc (sizeof (*cb));
 504         if (cb == NULL)
 505         {
 506                 ERROR ("write_http plugin: malloc failed.");
 507                 return (-1);
 508         }
 509         memset (cb, 0, sizeof (*cb));
 510         cb->verify_peer = 1;
 511         cb->verify_host = 1;
 512         cb->format = WH_FORMAT_COMMAND;
 513         cb->sslversion = CURL_SSLVERSION_DEFAULT;
 514
 515         pthread_mutex_init (&cb->send_lock, /* attr = */ NULL);
 516
 517         cf_util_get_string (ci, &cb->location);
 518         if (cb->location == NULL)
 519                 return (-1);
 520
 521         for (i = 0; i < ci->children_num; i++)
 522         {
 523                 oconfig_item_t *child = ci->children + i;
 524
 525                 if (strcasecmp ("User", child->key) == 0)
 526                         cf_util_get_string (child, &cb->user);
 527                 else if (strcasecmp ("Password", child->key) == 0)
 528                         cf_util_get_string (child, &cb->pass);
 529                 else if (strcasecmp ("VerifyPeer", child->key) == 0)
 530                         cf_util_get_boolean (child, &cb->verify_peer);
 531                 else if (strcasecmp ("VerifyHost", child->key) == 0)
 532                         cf_util_get_boolean (child, &cb->verify_host);
 533                 else if (strcasecmp ("CACert", child->key) == 0)
 534                         cf_util_get_string (child, &cb->cacert);
 535                 else if (strcasecmp ("CAPath", child->key) == 0)
 536                         cf_util_get_string (child, &cb->capath);
 537                 else if (strcasecmp ("ClientKey", child->key) == 0)
 538                         cf_util_get_string (child, &cb->clientkey);
 539                 else if (strcasecmp ("ClientCert", child->key) == 0)
 540                         cf_util_get_string (child, &cb->clientcert);
 541                 else if (strcasecmp ("ClientKeyPass", child->key) == 0)
 542                         cf_util_get_string (child, &cb->clientkeypass);
 543                 else if (strcasecmp ("SSLVersion", child->key) == 0)
 544                 {
 545                         char *value = NULL;
 546
 547                         cf_util_get_string (child, &value);
 548
 549                         if (value == NULL || strcasecmp ("default", value) == 0)
 550                                 cb->sslversion = CURL_SSLVERSION_DEFAULT;
 551                         else if (strcasecmp ("SSLv2", value) == 0)
 552                                 cb->sslversion = CURL_SSLVERSION_SSLv2;
 553                         else if (strcasecmp ("SSLv3", value) == 0)
 554                                 cb->sslversion = CURL_SSLVERSION_SSLv3;
 555                         else if (strcasecmp ("TLSv1", value) == 0)
 556                                 cb->sslversion = CURL_SSLVERSION_TLSv1;
 557 #if (LIBCURL_VERSION_MAJOR > 7) || (LIBCURL_VERSION_MAJOR == 7 && LIBCURL_VERSION_MINOR >= 34)
 558                         else if (strcasecmp ("TLSv1_0", value) == 0)
 559                                 cb->sslversion = CURL_SSLVERSION_TLSv1_0;
 560                         else if (strcasecmp ("TLSv1_1", value) == 0)
 561                                 cb->sslversion = CURL_SSLVERSION_TLSv1_1;
 562                         else if (strcasecmp ("TLSv1_2", value) == 0)
 563                                 cb->sslversion = CURL_SSLVERSION_TLSv1_2;
 564 #endif
 565                         else
 566                                 ERROR ("write_http plugin: Invalid SSLVersion "
 567                                                 "option: %s.", value);
 568
 569                         sfree(value);
 570                 }
 571                 else if (strcasecmp ("Format", child->key) == 0)
 572                         config_set_format (cb, child);
 573                 else if (strcasecmp ("StoreRates", child->key) == 0)
 574                         cf_util_get_boolean (child, &cb->store_rates);
 575                 else if (strcasecmp ("BufferSize", child->key) == 0)
 576                         cf_util_get_int (child, &buffer_size);
 577                 else
 578                 {
 579                         ERROR ("write_http plugin: Invalid configuration "
 580                                         "option: %s.", child->key);
 581                 }
 582         }
 583
 584         /* Determine send_buffer_size. */
 585         cb->send_buffer_size = WRITE_HTTP_DEFAULT_BUFFER_SIZE;
 586         if (buffer_size >= 1024)
 587                 cb->send_buffer_size = (size_t) buffer_size;
 588         else if (buffer_size != 0)
 589                 ERROR ("write_http plugin: Ignoring invalid BufferSize setting (%d).",
 590                                 buffer_size);
 591
 592         /* Allocate the buffer. */
 593         cb->send_buffer = malloc (cb->send_buffer_size);
 594         if (cb->send_buffer == NULL)
 595         {
 596                 ERROR ("write_http plugin: malloc(%zu) failed.", cb->send_buffer_size);
 597                 wh_callback_free (cb);
 598                 return (-1);
 599         }
 600         /* Nulls the buffer and sets ..._free and ..._fill. */
 601         wh_reset_buffer (cb);
 602
 603         DEBUG ("write_http: Registering write callback with URL %s",
 604                         cb->location);
 605
 606         memset (&user_data, 0, sizeof (user_data));
 607         user_data.data = cb;
 608         user_data.free_func = NULL;
 609         plugin_register_flush ("write_http", wh_flush, &user_data);
 610
 611         user_data.free_func = wh_callback_free;
 612         plugin_register_write ("write_http", wh_write, &user_data);
 613
 614         return (0);
 615 } /* }}} int wh_config_url */
 616
 617 static int wh_config (oconfig_item_t *ci) /* {{{ */
 618 {
 619         int i;
 620
 621         for (i = 0; i < ci->children_num; i++)
 622         {
 623                 oconfig_item_t *child = ci->children + i;
 624
 625                 if (strcasecmp ("URL", child->key) == 0)
 626                         wh_config_url (child);
 627                 else
 628                 {
 629                         ERROR ("write_http plugin: Invalid configuration "
 630                                         "option: %s.", child->key);
 631                 }
 632         }
 633
 634         return (0);
 635 } /* }}} int wh_config */
 636
 637 static int wh_init (void) /* {{{ */
 638 {
 639         /* Call this while collectd is still single-threaded to avoid
 640          * initialization issues in libgcrypt. */
 641         curl_global_init (CURL_GLOBAL_SSL);
 642         return (0);
 643 } /* }}} int wh_init */
 644
 645 void module_register (void) /* {{{ */
 646 {
 647         plugin_register_complex_config ("write_http", wh_config);
 648         plugin_register_init ("write_http", wh_init);
 649 } /* }}} void module_register */
 650
 651 /* vim: set fdm=marker sw=8 ts=8 tw=78 et : */