1 /* This file is part of Pazpar2.
2 Copyright (C) 2006-2011 Index Data
4 Pazpar2 is free software; you can redistribute it and/or modify it under
5 the terms of the GNU General Public License as published by the Free
6 Software Foundation; either version 2, or (at your option) any later
9 Pazpar2 is distributed in the hope that it will be useful, but WITHOUT ANY
10 WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
27 #include <libxml/parser.h>
28 #include <libxml/tree.h>
30 #include <yaz/yaz-util.h>
32 #include <yaz/snprintf.h>
33 #include <yaz/tpath.h>
34 #include <yaz/xml_include.h>
36 #include <sys/types.h>
43 #include "pazpar2_config.h"
50 NMEM nmem; /* for conf_config and servers memory */
51 struct conf_server *servers;
55 iochan_man_t iochan_man;
56 database_hosts_t database_hosts;
59 static void conf_metadata_assign(NMEM nmem,
60 struct conf_metadata * metadata,
62 enum conf_metadata_type type,
63 enum conf_metadata_merge merge,
64 enum conf_setting_type setting,
69 enum conf_metadata_mergekey mt,
70 const char *facetrule)
72 assert(nmem && metadata && name);
74 metadata->name = nmem_strdup(nmem, name);
76 metadata->type = type;
78 // enforcing that type_year is always range_merge
79 if (metadata->type == Metadata_type_year)
80 metadata->merge = Metadata_merge_range;
82 metadata->merge = merge;
84 metadata->setting = setting;
85 metadata->brief = brief;
86 metadata->termlist = termlist;
87 metadata->rank = rank;
88 metadata->sortkey_offset = sortkey_offset;
89 metadata->mergekey = mt;
90 metadata->facetrule = nmem_strdup_null(nmem, facetrule);
94 static void conf_sortkey_assign(NMEM nmem,
95 struct conf_sortkey * sortkey,
97 enum conf_sortkey_type type)
99 assert(nmem && sortkey && name);
101 sortkey->name = nmem_strdup(nmem, name);
102 sortkey->type = type;
105 static struct conf_service *service_init(struct conf_server *server,
106 int num_metadata, int num_sortkeys,
107 const char *service_id)
109 struct conf_service * service = 0;
110 NMEM nmem = nmem_create();
112 service = nmem_malloc(nmem, sizeof(struct conf_service));
114 service->ref_count = 1;
115 service->nmem = nmem;
117 service->databases = 0;
118 service->server = server;
119 service->session_timeout = 60; /* default session timeout */
120 service->z3950_session_timeout = 180;
121 service->z3950_operation_timeout = 30;
123 service->charsets = 0;
125 service->id = service_id ? nmem_strdup(nmem, service_id) : 0;
126 service->num_metadata = num_metadata;
127 service->metadata = 0;
128 if (service->num_metadata)
131 sizeof(struct conf_metadata) * service->num_metadata);
132 service->num_sortkeys = num_sortkeys;
133 service->sortkeys = 0;
134 if (service->num_sortkeys)
137 sizeof(struct conf_sortkey) * service->num_sortkeys);
138 service->dictionary = 0;
142 static struct conf_metadata* conf_service_add_metadata(
143 struct conf_service *service,
146 enum conf_metadata_type type,
147 enum conf_metadata_merge merge,
148 enum conf_setting_type setting,
153 enum conf_metadata_mergekey mt,
154 const char *facetrule)
156 struct conf_metadata * md = 0;
158 if (!service || !service->metadata || !service->num_metadata
159 || field_id < 0 || !(field_id < service->num_metadata))
162 md = service->metadata + field_id;
163 conf_metadata_assign(service->nmem, md, name, type, merge, setting,
164 brief, termlist, rank, sortkey_offset,
169 static struct conf_sortkey * conf_service_add_sortkey(
170 struct conf_service *service,
173 enum conf_sortkey_type type)
175 struct conf_sortkey * sk = 0;
177 if (!service || !service->sortkeys || !service->num_sortkeys
178 || field_id < 0 || !(field_id < service->num_sortkeys))
181 //sk = &((service->sortkeys)[field_id]);
182 sk = service->sortkeys + field_id;
183 conf_sortkey_assign(service->nmem, sk, name, type);
188 int conf_service_metadata_field_id(struct conf_service *service,
193 if (!service || !service->metadata || !service->num_metadata)
196 for (i = 0; i < service->num_metadata; i++)
197 if (!strcmp(name, (service->metadata[i]).name))
202 int conf_service_sortkey_field_id(struct conf_service *service,
207 if (!service || !service->sortkeys || !service->num_sortkeys)
210 for (i = 0; i < service->num_sortkeys; i++)
211 if (!strcmp(name, (service->sortkeys[i]).name))
216 static void conf_dir_path(struct conf_config *config, WRBUF w, const char *src)
218 if (config->confdir && wrbuf_len(config->confdir) > 0 &&
219 !yaz_is_abspath(src))
221 wrbuf_printf(w, "%s/%s", wrbuf_cstr(config->confdir), src);
227 void service_destroy(struct conf_service *service)
231 if (!pazpar2_decref(&service->ref_count, service->mutex))
233 pp2_charset_fact_destroy(service->charsets);
234 yaz_mutex_destroy(&service->mutex);
235 nmem_destroy(service->nmem);
240 void service_incref(struct conf_service *service)
242 yaz_log(YLOG_LOG, "service_incref. p=%p cnt=%d", service,
244 pazpar2_incref(&service->ref_count, service->mutex);
247 static int parse_metadata(struct conf_service *service, xmlNode *n,
248 int *md_node, int *sk_node)
250 enum conf_metadata_type type = Metadata_type_generic;
251 enum conf_metadata_merge merge = Metadata_merge_no;
252 enum conf_setting_type setting = Metadata_setting_no;
253 enum conf_metadata_mergekey mergekey_type = Metadata_mergekey_no;
257 int sortkey_offset = 0;
258 xmlChar *xml_name = 0;
259 xmlChar *xml_brief = 0;
260 xmlChar *xml_sortkey = 0;
261 xmlChar *xml_merge = 0;
262 xmlChar *xml_type = 0;
263 xmlChar *xml_termlist = 0;
264 xmlChar *xml_rank = 0;
265 xmlChar *xml_setting = 0;
266 xmlChar *xml_mergekey = 0;
267 xmlChar *xml_icu_chain = 0;
268 struct _xmlAttr *attr;
269 for (attr = n->properties; attr; attr = attr->next)
271 if (!xmlStrcmp(attr->name, BAD_CAST "name") &&
272 attr->children && attr->children->type == XML_TEXT_NODE)
273 xml_name = attr->children->content;
274 else if (!xmlStrcmp(attr->name, BAD_CAST "brief") &&
275 attr->children && attr->children->type == XML_TEXT_NODE)
276 xml_brief = attr->children->content;
277 else if (!xmlStrcmp(attr->name, BAD_CAST "sortkey") &&
278 attr->children && attr->children->type == XML_TEXT_NODE)
279 xml_sortkey = attr->children->content;
280 else if (!xmlStrcmp(attr->name, BAD_CAST "merge") &&
281 attr->children && attr->children->type == XML_TEXT_NODE)
282 xml_merge = attr->children->content;
283 else if (!xmlStrcmp(attr->name, BAD_CAST "type") &&
284 attr->children && attr->children->type == XML_TEXT_NODE)
285 xml_type = attr->children->content;
286 else if (!xmlStrcmp(attr->name, BAD_CAST "termlist") &&
287 attr->children && attr->children->type == XML_TEXT_NODE)
288 xml_termlist = attr->children->content;
289 else if (!xmlStrcmp(attr->name, BAD_CAST "rank") &&
290 attr->children && attr->children->type == XML_TEXT_NODE)
291 xml_rank = attr->children->content;
292 else if (!xmlStrcmp(attr->name, BAD_CAST "setting") &&
293 attr->children && attr->children->type == XML_TEXT_NODE)
294 xml_setting = attr->children->content;
295 else if (!xmlStrcmp(attr->name, BAD_CAST "mergekey") &&
296 attr->children && attr->children->type == XML_TEXT_NODE)
297 xml_mergekey = attr->children->content;
298 else if (!xmlStrcmp(attr->name, BAD_CAST "facetrule") &&
299 attr->children && attr->children->type == XML_TEXT_NODE)
300 xml_icu_chain = attr->children->content;
303 yaz_log(YLOG_FATAL, "Unknown metadata attribute '%s'", attr->name);
308 // now do the parsing logic
311 yaz_log(YLOG_FATAL, "Must specify name in metadata element");
316 if (!strcmp((const char *) xml_brief, "yes"))
318 else if (strcmp((const char *) xml_brief, "no"))
320 yaz_log(YLOG_FATAL, "metadata/brief must be yes or no");
327 if (!strcmp((const char *) xml_termlist, "yes"))
329 else if (strcmp((const char *) xml_termlist, "no"))
331 yaz_log(YLOG_FATAL, "metadata/termlist must be yes or no");
337 rank = atoi((const char *) xml_rank);
341 if (!strcmp((const char *) xml_type, "generic"))
342 type = Metadata_type_generic;
343 else if (!strcmp((const char *) xml_type, "year"))
344 type = Metadata_type_year;
345 else if (!strcmp((const char *) xml_type, "date"))
346 type = Metadata_type_date;
350 "Unknown value for metadata/type: %s", xml_type);
357 if (!strcmp((const char *) xml_merge, "no"))
358 merge = Metadata_merge_no;
359 else if (!strcmp((const char *) xml_merge, "unique"))
360 merge = Metadata_merge_unique;
361 else if (!strcmp((const char *) xml_merge, "longest"))
362 merge = Metadata_merge_longest;
363 else if (!strcmp((const char *) xml_merge, "range"))
364 merge = Metadata_merge_range;
365 else if (!strcmp((const char *) xml_merge, "all"))
366 merge = Metadata_merge_all;
370 "Unknown value for metadata/merge: %s", xml_merge);
377 if (!strcmp((const char *) xml_setting, "no"))
378 setting = Metadata_setting_no;
379 else if (!strcmp((const char *) xml_setting, "postproc"))
380 setting = Metadata_setting_postproc;
381 else if (!strcmp((const char *) xml_setting, "parameter"))
382 setting = Metadata_setting_parameter;
386 "Unknown value for medadata/setting: %s", xml_setting);
391 // add a sortkey if so specified
392 if (xml_sortkey && strcmp((const char *) xml_sortkey, "no"))
394 enum conf_sortkey_type sk_type;
395 if (merge == Metadata_merge_no)
398 "Can't specify sortkey on a non-merged field");
401 if (!strcmp((const char *) xml_sortkey, "numeric"))
402 sk_type = Metadata_sortkey_numeric;
403 else if (!strcmp((const char *) xml_sortkey, "skiparticle"))
404 sk_type = Metadata_sortkey_skiparticle;
408 "Unknown sortkey in metadata element: %s",
412 sortkey_offset = *sk_node;
414 conf_service_add_sortkey(service, *sk_node,
415 (const char *) xml_name, sk_type);
423 if (!strcmp((const char *) xml_mergekey, "required"))
424 mergekey_type = Metadata_mergekey_required;
425 else if (!strcmp((const char *) xml_mergekey, "optional"))
426 mergekey_type = Metadata_mergekey_optional;
427 else if (!strcmp((const char *) xml_mergekey, "no"))
428 mergekey_type = Metadata_mergekey_no;
431 yaz_log(YLOG_FATAL, "Unknown value for mergekey: %s", xml_mergekey);
436 // metadata known, assign values
437 conf_service_add_metadata(service, *md_node,
438 (const char *) xml_name,
439 type, merge, setting,
440 brief, termlist, rank, sortkey_offset,
441 mergekey_type, (const char *) xml_icu_chain);
446 static struct conf_service *service_create_static(struct conf_server *server,
448 const char *service_id)
454 struct conf_service *service = 0;
455 int num_metadata = 0;
456 int num_sortkeys = 0;
457 int got_settings = 0;
459 // count num_metadata and num_sortkeys
460 for (n = node->children; n; n = n->next)
461 if (n->type == XML_ELEMENT_NODE && !strcmp((const char *)
462 n->name, "metadata"))
464 xmlChar *sortkey = xmlGetProp(n, (xmlChar *) "sortkey");
466 if (sortkey && strcmp((const char *) sortkey, "no"))
471 service = service_init(server, num_metadata, num_sortkeys, service_id);
473 for (n = node->children; n; n = n->next)
475 if (n->type != XML_ELEMENT_NODE)
477 if (!strcmp((const char *) n->name, "timeout"))
479 xmlChar *src = xmlGetProp(n, (xmlChar *) "session");
482 service->session_timeout = atoi((const char *) src);
484 if (service->session_timeout < 9)
486 yaz_log(YLOG_FATAL, "session timeout out of range");
490 src = xmlGetProp(n, (xmlChar *) "z3950_operation");
493 service->z3950_operation_timeout = atoi((const char *) src);
495 if (service->z3950_session_timeout < 9)
497 yaz_log(YLOG_FATAL, "Z39.50 operation timeout out of range");
501 src = xmlGetProp(n, (xmlChar *) "z3950_session");
504 service->z3950_session_timeout = atoi((const char *) src);
506 if (service->z3950_session_timeout < 9)
508 yaz_log(YLOG_FATAL, "Z39.50 session timeout out of range");
513 else if (!strcmp((const char *) n->name, "settings"))
515 else if (!strcmp((const char *) n->name, "icu_chain"))
517 if (!service->charsets)
518 service->charsets = pp2_charset_fact_create();
519 if (pp2_charset_fact_define(service->charsets, n, 0))
521 yaz_log(YLOG_FATAL, "ICU chain definition error");
525 else if (!strcmp((const char *) n->name, "relevance")
526 || !strcmp((const char *) n->name, "sort")
527 || !strcmp((const char *) n->name, "mergekey")
528 || !strcmp((const char *) n->name, "facet"))
531 if (!service->charsets)
532 service->charsets = pp2_charset_fact_create();
533 if (pp2_charset_fact_define(service->charsets,
534 n->children, (const char *) n->name))
536 yaz_log(YLOG_FATAL, "ICU chain definition error");
540 else if (!strcmp((const char *) n->name, (const char *) "metadata"))
542 if (parse_metadata(service, n, &md_node, &sk_node))
547 yaz_log(YLOG_FATAL, "Bad element: %s", n->name);
554 /* metadata has been read.. Consider now settings */
555 init_settings(service);
556 for (pass = 1; pass <= 2; pass++)
558 for (n = node->children; n; n = n->next)
560 if (n->type != XML_ELEMENT_NODE)
562 if (!strcmp((const char *) n->name, "settings"))
564 xmlChar *src = xmlGetProp(n, (xmlChar *) "src");
567 WRBUF w = wrbuf_alloc();
568 conf_dir_path(server->config, w, (const char *) src);
569 settings_read_file(service, wrbuf_cstr(w), pass);
575 settings_read_node(service, n, pass);
584 static void inherit_server_settings(struct conf_service *s)
586 struct conf_server *server = s->server;
587 if (!s->dictionary) /* service has no config settings ? */
589 if (server->settings_fname)
591 /* inherit settings from server */
593 settings_read_file(s, server->settings_fname, 1);
594 settings_read_file(s, server->settings_fname, 2);
598 yaz_log(YLOG_WARN, "service '%s' has no settings",
599 s->id ? s->id : "unnamed");
604 /* use relevance/sort/mergekey/facet from server if not defined
605 for this service.. */
608 if (server->charsets)
610 s->charsets = server->charsets;
611 pp2_charset_fact_incref(s->charsets);
615 s->charsets = pp2_charset_fact_create();
620 struct conf_service *service_create(struct conf_server *server,
623 struct conf_service *service = service_create_static(server,
627 inherit_server_settings(service);
628 resolve_databases(service);
629 assert(service->mutex == 0);
630 pazpar2_mutex_create(&service->mutex, "conf");
635 static struct conf_server *server_create(struct conf_config *config,
636 NMEM nmem, xmlNode *node)
639 struct conf_server *server = nmem_malloc(nmem, sizeof(struct conf_server));
640 xmlChar *server_id = xmlGetProp(node, (xmlChar *) "id");
644 server->proxy_host = 0;
645 server->proxy_port = 0;
648 server->config = config;
650 server->charsets = 0;
651 server->http_server = 0;
652 server->iochan_man = 0;
653 server->database_hosts = config->database_hosts;
654 server->settings_fname = 0;
658 server->server_id = nmem_strdup(nmem, (const char *)server_id);
662 server->server_id = 0;
663 for (n = node->children; n; n = n->next)
665 if (n->type != XML_ELEMENT_NODE)
667 if (!strcmp((const char *) n->name, "listen"))
669 xmlChar *port = xmlGetProp(n, (xmlChar *) "port");
670 xmlChar *host = xmlGetProp(n, (xmlChar *) "host");
672 server->port = atoi((const char *) port);
674 server->host = nmem_strdup(nmem, (const char *) host);
678 else if (!strcmp((const char *) n->name, "proxy"))
680 xmlChar *port = xmlGetProp(n, (xmlChar *) "port");
681 xmlChar *host = xmlGetProp(n, (xmlChar *) "host");
682 xmlChar *myurl = xmlGetProp(n, (xmlChar *) "myurl");
684 server->proxy_port = atoi((const char *) port);
686 server->proxy_host = nmem_strdup(nmem, (const char *) host);
688 server->myurl = nmem_strdup(nmem, (const char *) myurl);
693 else if (!strcmp((const char *) n->name, "settings"))
695 xmlChar *src = xmlGetProp(n, (xmlChar *) "src");
699 yaz_log(YLOG_FATAL, "Missing src attribute for settings");
702 if (server->settings_fname)
705 yaz_log(YLOG_FATAL, "Can't repeat 'settings'");
709 conf_dir_path(config, w, (const char *) src);
710 server->settings_fname = nmem_strdup(nmem, wrbuf_cstr(w));
714 else if (!strcmp((const char *) n->name, "icu_chain"))
716 if (!server->charsets)
717 server->charsets = pp2_charset_fact_create();
718 if (pp2_charset_fact_define(server->charsets, n, 0))
720 yaz_log(YLOG_FATAL, "ICU chain definition error");
724 else if (!strcmp((const char *) n->name, "relevance")
725 || !strcmp((const char *) n->name, "sort")
726 || !strcmp((const char *) n->name, "mergekey")
727 || !strcmp((const char *) n->name, "facet"))
729 if (!server->charsets)
730 server->charsets = pp2_charset_fact_create();
731 if (pp2_charset_fact_define(server->charsets,
732 n->children, (const char *) n->name))
734 yaz_log(YLOG_FATAL, "ICU chain definition error");
738 else if (!strcmp((const char *) n->name, "service"))
740 char *service_id = (char *)
741 xmlGetProp(n, (xmlChar *) "id");
743 struct conf_service **sp = &server->service;
744 for (; *sp; sp = &(*sp)->next)
745 if ((*sp)->id && service_id &&
746 0 == strcmp((*sp)->id, service_id))
748 yaz_log(YLOG_FATAL, "Duplicate service: %s", service_id);
751 else if (!(*sp)->id && !service_id)
753 yaz_log(YLOG_FATAL, "Duplicate unnamed service");
757 if (*sp) /* service already exist */
764 struct conf_service *s = service_create_static(server, n,
774 yaz_log(YLOG_FATAL, "Bad element: %s", n->name);
780 struct conf_service *s;
781 for (s = server->service; s; s = s->next)
782 inherit_server_settings(s);
787 WRBUF conf_get_fname(struct conf_config *config, const char *fname)
789 WRBUF w = wrbuf_alloc();
791 conf_dir_path(config, w, fname);
795 struct conf_service *locate_service(struct conf_server *server,
796 const char *service_id)
798 struct conf_service *s = server->service;
799 for (; s; s = s->next)
800 if (s->id && service_id && 0 == strcmp(s->id, service_id))
802 else if (!s->id && !service_id)
809 void info_services(struct conf_server *server, WRBUF w)
811 struct conf_service *s = server->service;
812 wrbuf_puts(w, " <services>\n");
813 for (; s; s = s->next)
815 wrbuf_puts(w, " <service");
818 wrbuf_puts(w, " id=\"");
819 wrbuf_xmlputs(w, s->id);
826 wrbuf_puts(w, " </services>\n");
829 static int parse_config(struct conf_config *config, xmlNode *root)
833 for (n = root->children; n; n = n->next)
835 if (n->type != XML_ELEMENT_NODE)
837 if (!strcmp((const char *) n->name, "server"))
839 struct conf_server *tmp = server_create(config, config->nmem, n);
842 tmp->next = config->servers;
843 config->servers = tmp;
845 else if (!strcmp((const char *) n->name, "threads"))
847 xmlChar *number = xmlGetProp(n, (xmlChar *) "number");
850 config->no_threads = atoi((const char *) number);
854 else if (!strcmp((const char *) n->name, "targetprofiles"))
856 yaz_log(YLOG_FATAL, "targetprofiles unsupported here. Must be part of service");
862 yaz_log(YLOG_FATAL, "Bad element: %s", n->name);
869 struct conf_config *config_create(const char *fname, int verbose)
871 xmlDoc *doc = xmlParseFile(fname);
875 NMEM nmem = nmem_create();
876 struct conf_config *config = nmem_malloc(nmem, sizeof(struct conf_config));
878 xmlSubstituteEntitiesDefault(1);
879 xmlLoadExtDtdDefaultValue = 1;
882 yaz_log(YLOG_FATAL, "Failed to read %s", fname);
889 config->no_threads = 0;
890 config->iochan_man = 0;
891 config->database_hosts = database_hosts_create();
893 config->confdir = wrbuf_alloc();
894 if ((p = strrchr(fname,
903 wrbuf_write(config->confdir, fname, len);
905 wrbuf_puts(config->confdir, "");
907 n = xmlDocGetRootElement(doc);
908 r = yaz_xml_include_simple(n, wrbuf_cstr(config->confdir));
913 yaz_log(YLOG_LOG, "Configuration %s after include processing",
915 #if LIBXML_VERSION >= 20600
916 xmlDocFormatDump(yaz_log_file(), doc, 0);
918 xmlDocDump(yaz_log_file(), doc);
921 r = parse_config(config, n);
927 config_destroy(config);
933 void server_destroy(struct conf_server *server)
935 struct conf_service *s = server->service;
938 struct conf_service *s_next = s->next;
942 pp2_charset_fact_destroy(server->charsets);
943 yaz_log(YLOG_LOG, "server_destroy server=%p", server);
944 http_server_destroy(server->http_server);
947 void config_destroy(struct conf_config *config)
951 struct conf_server *server = config->servers;
952 iochan_man_destroy(&config->iochan_man);
955 struct conf_server *s_next = server->next;
956 server_destroy(server);
958 database_hosts_destroy(&config->database_hosts);
960 wrbuf_destroy(config->confdir);
961 nmem_destroy(config->nmem);
965 void config_stop_listeners(struct conf_config *conf)
967 struct conf_server *ser;
968 for (ser = conf->servers; ser; ser = ser->next)
969 http_close_server(ser);
972 void config_process_events(struct conf_config *conf)
974 struct conf_server *ser;
976 for (ser = conf->servers; ser; ser = ser->next)
978 struct conf_service *s = ser->service;
980 for (;s ; s = s->next)
982 resolve_databases(s);
983 assert(s->mutex == 0);
984 pazpar2_mutex_create(&s->mutex, "service");
986 http_mutex_init(ser);
988 iochan_man_events(conf->iochan_man);
991 int config_start_listeners(struct conf_config *conf,
992 const char *listener_override,
993 const char *record_fname)
995 struct conf_server *ser;
997 conf->iochan_man = iochan_man_create(conf->no_threads);
998 for (ser = conf->servers; ser; ser = ser->next)
1000 WRBUF w = wrbuf_alloc();
1003 ser->iochan_man = conf->iochan_man;
1004 if (listener_override)
1006 wrbuf_puts(w, listener_override);
1007 listener_override = 0; /* only first server is overriden */
1012 wrbuf_puts(w, ser->host);
1017 wrbuf_printf(w, "%d", ser->port);
1020 r = http_init(wrbuf_cstr(w), ser, record_fname);
1026 if (ser->proxy_host || ser->proxy_port)
1028 if (ser->proxy_host)
1029 wrbuf_puts(w, ser->proxy_host);
1030 if (ser->proxy_port)
1034 wrbuf_printf(w, "%d", ser->proxy_port);
1038 http_set_proxyaddr(wrbuf_cstr(w), ser);
1047 * c-file-style: "Stroustrup"
1048 * indent-tabs-mode: nil
1050 * vim: shiftwidth=4 tabstop=8 expandtab