cgit.c

   1 /* cgit.c: cgi for the git scm
   2  *
   3  * Copyright (C) 2006-2014 cgit Development Team <cgit@lists.zx2c4.com>
   4  *
   5  * Licensed under GNU General Public License v2
   6  *   (see COPYING for full license text)
   7  */
   8
   9 #include "cgit.h"
  10 #include "cache.h"
  11 #include "cmd.h"
  12 #include "configfile.h"
  13 #include "html.h"
  14 #include "ui-shared.h"
  15 #include "ui-stats.h"
  16 #include "ui-blob.h"
  17 #include "ui-summary.h"
  18 #include "scan-tree.h"
  19
  20 const char *cgit_version = CGIT_VERSION;
  21
  22 static void add_mimetype(const char *name, const char *value)
  23 {
  24         struct string_list_item *item;
  25
  26         item = string_list_insert(&ctx.cfg.mimetypes, xstrdup(name));
  27         item->util = xstrdup(value);
  28 }
  29
  30 static void process_cached_repolist(const char *path);
  31
  32 static void repo_config(struct cgit_repo *repo, const char *name, const char *value)
  33 {
  34         struct string_list_item *item;
  35
  36         if (!strcmp(name, "name"))
  37                 repo->name = xstrdup(value);
  38         else if (!strcmp(name, "clone-url"))
  39                 repo->clone_url = xstrdup(value);
  40         else if (!strcmp(name, "desc"))
  41                 repo->desc = xstrdup(value);
  42         else if (!strcmp(name, "owner"))
  43                 repo->owner = xstrdup(value);
  44         else if (!strcmp(name, "defbranch"))
  45                 repo->defbranch = xstrdup(value);
  46         else if (!strcmp(name, "snapshots"))
  47                 repo->snapshots = ctx.cfg.snapshots & cgit_parse_snapshots_mask(value);
  48         else if (!strcmp(name, "enable-commit-graph"))
  49                 repo->enable_commit_graph = atoi(value);
  50         else if (!strcmp(name, "enable-log-filecount"))
  51                 repo->enable_log_filecount = atoi(value);
  52         else if (!strcmp(name, "enable-log-linecount"))
  53                 repo->enable_log_linecount = atoi(value);
  54         else if (!strcmp(name, "enable-remote-branches"))
  55                 repo->enable_remote_branches = atoi(value);
  56         else if (!strcmp(name, "enable-subject-links"))
  57                 repo->enable_subject_links = atoi(value);
  58         else if (!strcmp(name, "branch-sort")) {
  59                 if (!strcmp(value, "age"))
  60                         repo->branch_sort = 1;
  61                 if (!strcmp(value, "name"))
  62                         repo->branch_sort = 0;
  63         } else if (!strcmp(name, "commit-sort")) {
  64                 if (!strcmp(value, "date"))
  65                         repo->commit_sort = 1;
  66                 if (!strcmp(value, "topo"))
  67                         repo->commit_sort = 2;
  68         } else if (!strcmp(name, "max-stats"))
  69                 repo->max_stats = cgit_find_stats_period(value, NULL);
  70         else if (!strcmp(name, "module-link"))
  71                 repo->module_link= xstrdup(value);
  72         else if (starts_with(name, "module-link.")) {
  73                 item = string_list_append(&repo->submodules, xstrdup(name + 12));
  74                 item->util = xstrdup(value);
  75         } else if (!strcmp(name, "section"))
  76                 repo->section = xstrdup(value);
  77         else if (!strcmp(name, "readme") && value != NULL) {
  78                 if (repo->readme.items == ctx.cfg.readme.items)
  79                         memset(&repo->readme, 0, sizeof(repo->readme));
  80                 string_list_append(&repo->readme, xstrdup(value));
  81         } else if (!strcmp(name, "logo") && value != NULL)
  82                 repo->logo = xstrdup(value);
  83         else if (!strcmp(name, "logo-link") && value != NULL)
  84                 repo->logo_link = xstrdup(value);
  85         else if (ctx.cfg.enable_filter_overrides) {
  86                 if (!strcmp(name, "about-filter"))
  87                         repo->about_filter = cgit_new_filter(value, ABOUT);
  88                 else if (!strcmp(name, "commit-filter"))
  89                         repo->commit_filter = cgit_new_filter(value, COMMIT);
  90                 else if (!strcmp(name, "source-filter"))
  91                         repo->source_filter = cgit_new_filter(value, SOURCE);
  92                 else if (!strcmp(name, "email-filter"))
  93                         repo->email_filter = cgit_new_filter(value, EMAIL);
  94                 else if (!strcmp(name, "owner-filter"))
  95                         repo->owner_filter = cgit_new_filter(value, OWNER);
  96         } else if (!strcmp(name, "hide")) {
  97                 repo->hide = atoi(value);
  98         } else if (!strcmp(name, "ignore")) {
  99                 repo->ignore = atoi(value);
 100         }
 101 }
 102
 103 static void config_cb(const char *name, const char *value)
 104 {
 105         if (!strcmp(name, "section") || !strcmp(name, "repo.group"))
 106                 ctx.cfg.section = xstrdup(value);
 107         else if (!strcmp(name, "repo.url"))
 108                 ctx.repo = cgit_add_repo(value);
 109         else if (ctx.repo && !strcmp(name, "repo.path"))
 110                 ctx.repo->path = trim_end(value, '/');
 111         else if (ctx.repo && starts_with(name, "repo."))
 112                 repo_config(ctx.repo, name + 5, value);
 113         else if (!strcmp(name, "readme") && value != NULL)
 114                 string_list_append(&ctx.cfg.readme, xstrdup(value));
 115         else if (!strcmp(name, "root-title"))
 116                 ctx.cfg.root_title = xstrdup(value);
 117         else if (!strcmp(name, "root-desc"))
 118                 ctx.cfg.root_desc = xstrdup(value);
 119         else if (!strcmp(name, "root-readme"))
 120                 ctx.cfg.root_readme = xstrdup(value);
 121         else if (!strcmp(name, "css"))
 122                 ctx.cfg.css = xstrdup(value);
 123         else if (!strcmp(name, "favicon"))
 124                 ctx.cfg.favicon = xstrdup(value);
 125         else if (!strcmp(name, "footer"))
 126                 ctx.cfg.footer = xstrdup(value);
 127         else if (!strcmp(name, "head-include"))
 128                 ctx.cfg.head_include = xstrdup(value);
 129         else if (!strcmp(name, "header"))
 130                 ctx.cfg.header = xstrdup(value);
 131         else if (!strcmp(name, "logo"))
 132                 ctx.cfg.logo = xstrdup(value);
 133         else if (!strcmp(name, "index-header"))
 134                 ctx.cfg.index_header = xstrdup(value);
 135         else if (!strcmp(name, "index-info"))
 136                 ctx.cfg.index_info = xstrdup(value);
 137         else if (!strcmp(name, "logo-link"))
 138                 ctx.cfg.logo_link = xstrdup(value);
 139         else if (!strcmp(name, "module-link"))
 140                 ctx.cfg.module_link = xstrdup(value);
 141         else if (!strcmp(name, "strict-export"))
 142                 ctx.cfg.strict_export = xstrdup(value);
 143         else if (!strcmp(name, "virtual-root")) {
 144                 ctx.cfg.virtual_root = ensure_end(value, '/');
 145         } else if (!strcmp(name, "nocache"))
 146                 ctx.cfg.nocache = atoi(value);
 147         else if (!strcmp(name, "noplainemail"))
 148                 ctx.cfg.noplainemail = atoi(value);
 149         else if (!strcmp(name, "noheader"))
 150                 ctx.cfg.noheader = atoi(value);
 151         else if (!strcmp(name, "snapshots"))
 152                 ctx.cfg.snapshots = cgit_parse_snapshots_mask(value);
 153         else if (!strcmp(name, "enable-filter-overrides"))
 154                 ctx.cfg.enable_filter_overrides = atoi(value);
 155         else if (!strcmp(name, "enable-http-clone"))
 156                 ctx.cfg.enable_http_clone = atoi(value);
 157         else if (!strcmp(name, "enable-index-links"))
 158                 ctx.cfg.enable_index_links = atoi(value);
 159         else if (!strcmp(name, "enable-index-owner"))
 160                 ctx.cfg.enable_index_owner = atoi(value);
 161         else if (!strcmp(name, "enable-commit-graph"))
 162                 ctx.cfg.enable_commit_graph = atoi(value);
 163         else if (!strcmp(name, "enable-log-filecount"))
 164                 ctx.cfg.enable_log_filecount = atoi(value);
 165         else if (!strcmp(name, "enable-log-linecount"))
 166                 ctx.cfg.enable_log_linecount = atoi(value);
 167         else if (!strcmp(name, "enable-remote-branches"))
 168                 ctx.cfg.enable_remote_branches = atoi(value);
 169         else if (!strcmp(name, "enable-subject-links"))
 170                 ctx.cfg.enable_subject_links = atoi(value);
 171         else if (!strcmp(name, "enable-tree-linenumbers"))
 172                 ctx.cfg.enable_tree_linenumbers = atoi(value);
 173         else if (!strcmp(name, "enable-git-config"))
 174                 ctx.cfg.enable_git_config = atoi(value);
 175         else if (!strcmp(name, "max-stats"))
 176                 ctx.cfg.max_stats = cgit_find_stats_period(value, NULL);
 177         else if (!strcmp(name, "cache-size"))
 178                 ctx.cfg.cache_size = atoi(value);
 179         else if (!strcmp(name, "cache-root"))
 180                 ctx.cfg.cache_root = xstrdup(expand_macros(value));
 181         else if (!strcmp(name, "cache-root-ttl"))
 182                 ctx.cfg.cache_root_ttl = atoi(value);
 183         else if (!strcmp(name, "cache-repo-ttl"))
 184                 ctx.cfg.cache_repo_ttl = atoi(value);
 185         else if (!strcmp(name, "cache-scanrc-ttl"))
 186                 ctx.cfg.cache_scanrc_ttl = atoi(value);
 187         else if (!strcmp(name, "cache-static-ttl"))
 188                 ctx.cfg.cache_static_ttl = atoi(value);
 189         else if (!strcmp(name, "cache-dynamic-ttl"))
 190                 ctx.cfg.cache_dynamic_ttl = atoi(value);
 191         else if (!strcmp(name, "cache-about-ttl"))
 192                 ctx.cfg.cache_about_ttl = atoi(value);
 193         else if (!strcmp(name, "cache-snapshot-ttl"))
 194                 ctx.cfg.cache_snapshot_ttl = atoi(value);
 195         else if (!strcmp(name, "case-sensitive-sort"))
 196                 ctx.cfg.case_sensitive_sort = atoi(value);
 197         else if (!strcmp(name, "about-filter"))
 198                 ctx.cfg.about_filter = cgit_new_filter(value, ABOUT);
 199         else if (!strcmp(name, "commit-filter"))
 200                 ctx.cfg.commit_filter = cgit_new_filter(value, COMMIT);
 201         else if (!strcmp(name, "email-filter"))
 202                 ctx.cfg.email_filter = cgit_new_filter(value, EMAIL);
 203         else if (!strcmp(name, "owner-filter"))
 204                 ctx.cfg.owner_filter = cgit_new_filter(value, OWNER);
 205         else if (!strcmp(name, "auth-filter"))
 206                 ctx.cfg.auth_filter = cgit_new_filter(value, AUTH);
 207         else if (!strcmp(name, "embedded"))
 208                 ctx.cfg.embedded = atoi(value);
 209         else if (!strcmp(name, "max-atom-items"))
 210                 ctx.cfg.max_atom_items = atoi(value);
 211         else if (!strcmp(name, "max-message-length"))
 212                 ctx.cfg.max_msg_len = atoi(value);
 213         else if (!strcmp(name, "max-repodesc-length"))
 214                 ctx.cfg.max_repodesc_len = atoi(value);
 215         else if (!strcmp(name, "max-blob-size"))
 216                 ctx.cfg.max_blob_size = atoi(value);
 217         else if (!strcmp(name, "max-repo-count"))
 218                 ctx.cfg.max_repo_count = atoi(value);
 219         else if (!strcmp(name, "max-commit-count"))
 220                 ctx.cfg.max_commit_count = atoi(value);
 221         else if (!strcmp(name, "project-list"))
 222                 ctx.cfg.project_list = xstrdup(expand_macros(value));
 223         else if (!strcmp(name, "scan-path"))
 224                 if (!ctx.cfg.nocache && ctx.cfg.cache_size)
 225                         process_cached_repolist(expand_macros(value));
 226                 else if (ctx.cfg.project_list)
 227                         scan_projects(expand_macros(value),
 228                                       ctx.cfg.project_list, repo_config);
 229                 else
 230                         scan_tree(expand_macros(value), repo_config);
 231         else if (!strcmp(name, "scan-hidden-path"))
 232                 ctx.cfg.scan_hidden_path = atoi(value);
 233         else if (!strcmp(name, "section-from-path"))
 234                 ctx.cfg.section_from_path = atoi(value);
 235         else if (!strcmp(name, "repository-sort"))
 236                 ctx.cfg.repository_sort = xstrdup(value);
 237         else if (!strcmp(name, "section-sort"))
 238                 ctx.cfg.section_sort = atoi(value);
 239         else if (!strcmp(name, "source-filter"))
 240                 ctx.cfg.source_filter = cgit_new_filter(value, SOURCE);
 241         else if (!strcmp(name, "summary-log"))
 242                 ctx.cfg.summary_log = atoi(value);
 243         else if (!strcmp(name, "summary-branches"))
 244                 ctx.cfg.summary_branches = atoi(value);
 245         else if (!strcmp(name, "summary-tags"))
 246                 ctx.cfg.summary_tags = atoi(value);
 247         else if (!strcmp(name, "side-by-side-diffs"))
 248                 ctx.cfg.difftype = atoi(value) ? DIFF_SSDIFF : DIFF_UNIFIED;
 249         else if (!strcmp(name, "agefile"))
 250                 ctx.cfg.agefile = xstrdup(value);
 251         else if (!strcmp(name, "mimetype-file"))
 252                 ctx.cfg.mimetype_file = xstrdup(value);
 253         else if (!strcmp(name, "renamelimit"))
 254                 ctx.cfg.renamelimit = atoi(value);
 255         else if (!strcmp(name, "remove-suffix"))
 256                 ctx.cfg.remove_suffix = atoi(value);
 257         else if (!strcmp(name, "robots"))
 258                 ctx.cfg.robots = xstrdup(value);
 259         else if (!strcmp(name, "clone-prefix"))
 260                 ctx.cfg.clone_prefix = xstrdup(value);
 261         else if (!strcmp(name, "clone-url"))
 262                 ctx.cfg.clone_url = xstrdup(value);
 263         else if (!strcmp(name, "local-time"))
 264                 ctx.cfg.local_time = atoi(value);
 265         else if (!strcmp(name, "commit-sort")) {
 266                 if (!strcmp(value, "date"))
 267                         ctx.cfg.commit_sort = 1;
 268                 if (!strcmp(value, "topo"))
 269                         ctx.cfg.commit_sort = 2;
 270         } else if (!strcmp(name, "branch-sort")) {
 271                 if (!strcmp(value, "age"))
 272                         ctx.cfg.branch_sort = 1;
 273                 if (!strcmp(value, "name"))
 274                         ctx.cfg.branch_sort = 0;
 275         } else if (starts_with(name, "mimetype."))
 276                 add_mimetype(name + 9, value);
 277         else if (!strcmp(name, "include"))
 278                 parse_configfile(expand_macros(value), config_cb);
 279 }
 280
 281 static void querystring_cb(const char *name, const char *value)
 282 {
 283         if (!value)
 284                 value = "";
 285
 286         if (!strcmp(name,"r")) {
 287                 ctx.qry.repo = xstrdup(value);
 288                 ctx.repo = cgit_get_repoinfo(value);
 289         } else if (!strcmp(name, "p")) {
 290                 ctx.qry.page = xstrdup(value);
 291         } else if (!strcmp(name, "url")) {
 292                 if (*value == '/')
 293                         value++;
 294                 ctx.qry.url = xstrdup(value);
 295                 cgit_parse_url(value);
 296         } else if (!strcmp(name, "qt")) {
 297                 ctx.qry.grep = xstrdup(value);
 298         } else if (!strcmp(name, "q")) {
 299                 ctx.qry.search = xstrdup(value);
 300         } else if (!strcmp(name, "h")) {
 301                 ctx.qry.head = xstrdup(value);
 302                 ctx.qry.has_symref = 1;
 303         } else if (!strcmp(name, "id")) {
 304                 ctx.qry.sha1 = xstrdup(value);
 305                 ctx.qry.has_sha1 = 1;
 306         } else if (!strcmp(name, "id2")) {
 307                 ctx.qry.sha2 = xstrdup(value);
 308                 ctx.qry.has_sha1 = 1;
 309         } else if (!strcmp(name, "ofs")) {
 310                 ctx.qry.ofs = atoi(value);
 311         } else if (!strcmp(name, "path")) {
 312                 ctx.qry.path = trim_end(value, '/');
 313         } else if (!strcmp(name, "name")) {
 314                 ctx.qry.name = xstrdup(value);
 315         } else if (!strcmp(name, "mimetype")) {
 316                 ctx.qry.mimetype = xstrdup(value);
 317         } else if (!strcmp(name, "s")) {
 318                 ctx.qry.sort = xstrdup(value);
 319         } else if (!strcmp(name, "showmsg")) {
 320                 ctx.qry.showmsg = atoi(value);
 321         } else if (!strcmp(name, "period")) {
 322                 ctx.qry.period = xstrdup(value);
 323         } else if (!strcmp(name, "dt")) {
 324                 ctx.qry.difftype = atoi(value);
 325                 ctx.qry.has_difftype = 1;
 326         } else if (!strcmp(name, "ss")) {
 327                 /* No longer generated, but there may be links out there. */
 328                 ctx.qry.difftype = atoi(value) ? DIFF_SSDIFF : DIFF_UNIFIED;
 329                 ctx.qry.has_difftype = 1;
 330         } else if (!strcmp(name, "all")) {
 331                 ctx.qry.show_all = atoi(value);
 332         } else if (!strcmp(name, "context")) {
 333                 ctx.qry.context = atoi(value);
 334         } else if (!strcmp(name, "ignorews")) {
 335                 ctx.qry.ignorews = atoi(value);
 336         }
 337 }
 338
 339 static void prepare_context(void)
 340 {
 341         memset(&ctx, 0, sizeof(ctx));
 342         ctx.cfg.agefile = "info/web/last-modified";
 343         ctx.cfg.nocache = 0;
 344         ctx.cfg.cache_size = 0;
 345         ctx.cfg.cache_max_create_time = 5;
 346         ctx.cfg.cache_root = CGIT_CACHE_ROOT;
 347         ctx.cfg.cache_about_ttl = 15;
 348         ctx.cfg.cache_snapshot_ttl = 5;
 349         ctx.cfg.cache_repo_ttl = 5;
 350         ctx.cfg.cache_root_ttl = 5;
 351         ctx.cfg.cache_scanrc_ttl = 15;
 352         ctx.cfg.cache_dynamic_ttl = 5;
 353         ctx.cfg.cache_static_ttl = -1;
 354         ctx.cfg.case_sensitive_sort = 1;
 355         ctx.cfg.branch_sort = 0;
 356         ctx.cfg.commit_sort = 0;
 357         ctx.cfg.css = "/cgit.css";
 358         ctx.cfg.logo = "/cgit.png";
 359         ctx.cfg.favicon = "/favicon.ico";
 360         ctx.cfg.local_time = 0;
 361         ctx.cfg.enable_http_clone = 1;
 362         ctx.cfg.enable_index_owner = 1;
 363         ctx.cfg.enable_tree_linenumbers = 1;
 364         ctx.cfg.enable_git_config = 0;
 365         ctx.cfg.max_repo_count = 50;
 366         ctx.cfg.max_commit_count = 50;
 367         ctx.cfg.max_lock_attempts = 5;
 368         ctx.cfg.max_msg_len = 80;
 369         ctx.cfg.max_repodesc_len = 80;
 370         ctx.cfg.max_blob_size = 0;
 371         ctx.cfg.max_stats = 0;
 372         ctx.cfg.project_list = NULL;
 373         ctx.cfg.renamelimit = -1;
 374         ctx.cfg.remove_suffix = 0;
 375         ctx.cfg.robots = "index, nofollow";
 376         ctx.cfg.root_title = "Git repository browser";
 377         ctx.cfg.root_desc = "a fast webinterface for the git dscm";
 378         ctx.cfg.scan_hidden_path = 0;
 379         ctx.cfg.script_name = CGIT_SCRIPT_NAME;
 380         ctx.cfg.section = "";
 381         ctx.cfg.repository_sort = "name";
 382         ctx.cfg.section_sort = 1;
 383         ctx.cfg.summary_branches = 10;
 384         ctx.cfg.summary_log = 10;
 385         ctx.cfg.summary_tags = 10;
 386         ctx.cfg.max_atom_items = 10;
 387         ctx.cfg.difftype = DIFF_UNIFIED;
 388         ctx.env.cgit_config = getenv("CGIT_CONFIG");
 389         ctx.env.http_host = getenv("HTTP_HOST");
 390         ctx.env.https = getenv("HTTPS");
 391         ctx.env.no_http = getenv("NO_HTTP");
 392         ctx.env.path_info = getenv("PATH_INFO");
 393         ctx.env.query_string = getenv("QUERY_STRING");
 394         ctx.env.request_method = getenv("REQUEST_METHOD");
 395         ctx.env.script_name = getenv("SCRIPT_NAME");
 396         ctx.env.server_name = getenv("SERVER_NAME");
 397         ctx.env.server_port = getenv("SERVER_PORT");
 398         ctx.env.http_cookie = getenv("HTTP_COOKIE");
 399         ctx.env.http_referer = getenv("HTTP_REFERER");
 400         ctx.env.content_length = getenv("CONTENT_LENGTH") ? strtoul(getenv("CONTENT_LENGTH"), NULL, 10) : 0;
 401         ctx.env.authenticated = 0;
 402         ctx.page.mimetype = "text/html";
 403         ctx.page.charset = PAGE_ENCODING;
 404         ctx.page.filename = NULL;
 405         ctx.page.size = 0;
 406         ctx.page.modified = time(NULL);
 407         ctx.page.expires = ctx.page.modified;
 408         ctx.page.etag = NULL;
 409         memset(&ctx.cfg.mimetypes, 0, sizeof(struct string_list));
 410         if (ctx.env.script_name)
 411                 ctx.cfg.script_name = xstrdup(ctx.env.script_name);
 412         if (ctx.env.query_string)
 413                 ctx.qry.raw = xstrdup(ctx.env.query_string);
 414         if (!ctx.env.cgit_config)
 415                 ctx.env.cgit_config = CGIT_CONFIG;
 416 }
 417
 418 struct refmatch {
 419         char *req_ref;
 420         char *first_ref;
 421         int match;
 422 };
 423
 424 static int find_current_ref(const char *refname, const unsigned char *sha1,
 425                             int flags, void *cb_data)
 426 {
 427         struct refmatch *info;
 428
 429         info = (struct refmatch *)cb_data;
 430         if (!strcmp(refname, info->req_ref))
 431                 info->match = 1;
 432         if (!info->first_ref)
 433                 info->first_ref = xstrdup(refname);
 434         return info->match;
 435 }
 436
 437 static void free_refmatch_inner(struct refmatch *info)
 438 {
 439         if (info->first_ref)
 440                 free(info->first_ref);
 441 }
 442
 443 static char *find_default_branch(struct cgit_repo *repo)
 444 {
 445         struct refmatch info;
 446         char *ref;
 447
 448         info.req_ref = repo->defbranch;
 449         info.first_ref = NULL;
 450         info.match = 0;
 451         for_each_branch_ref(find_current_ref, &info);
 452         if (info.match)
 453                 ref = info.req_ref;
 454         else
 455                 ref = info.first_ref;
 456         if (ref)
 457                 ref = xstrdup(ref);
 458         free_refmatch_inner(&info);
 459
 460         return ref;
 461 }
 462
 463 static char *guess_defbranch(void)
 464 {
 465         const char *ref;
 466         unsigned char sha1[20];
 467
 468         ref = resolve_ref_unsafe("HEAD", 0, sha1, NULL);
 469         if (!ref || !starts_with(ref, "refs/heads/"))
 470                 return "master";
 471         return xstrdup(ref + 11);
 472 }
 473 /* The caller must free filename and ref after calling this. */
 474 static inline void parse_readme(const char *readme, char **filename, char **ref, struct cgit_repo *repo)
 475 {
 476         const char *colon;
 477
 478         *filename = NULL;
 479         *ref = NULL;
 480
 481         if (!readme || !readme[0])
 482                 return;
 483
 484         /* Check if the readme is tracked in the git repo. */
 485         colon = strchr(readme, ':');
 486         if (colon && strlen(colon) > 1) {
 487                 /* If it starts with a colon, we want to use
 488                  * the default branch */
 489                 if (colon == readme && repo->defbranch)
 490                         *ref = xstrdup(repo->defbranch);
 491                 else
 492                         *ref = xstrndup(readme, colon - readme);
 493                 readme = colon + 1;
 494         }
 495
 496         /* Prepend repo path to relative readme path unless tracked. */
 497         if (!(*ref) && readme[0] != '/')
 498                 *filename = fmtalloc("%s/%s", repo->path, readme);
 499         else
 500                 *filename = xstrdup(readme);
 501 }
 502 static void choose_readme(struct cgit_repo *repo)
 503 {
 504         int found;
 505         char *filename, *ref;
 506         struct string_list_item *entry;
 507
 508         if (!repo->readme.nr)
 509                 return;
 510
 511         found = 0;
 512         for_each_string_list_item(entry, &repo->readme) {
 513                 parse_readme(entry->string, &filename, &ref, repo);
 514                 if (!filename) {
 515                         free(filename);
 516                         free(ref);
 517                         continue;
 518                 }
 519                 if (ref) {
 520                         if (cgit_ref_path_exists(filename, ref, 1)) {
 521                                 found = 1;
 522                                 break;
 523                         }
 524                 }
 525                 else if (!access(filename, R_OK)) {
 526                         found = 1;
 527                         break;
 528                 }
 529                 free(filename);
 530                 free(ref);
 531         }
 532         repo->readme.strdup_strings = 1;
 533         string_list_clear(&repo->readme, 0);
 534         repo->readme.strdup_strings = 0;
 535         if (found)
 536                 string_list_append(&repo->readme, filename)->util = ref;
 537 }
 538
 539 static void print_no_repo_clone_urls(const char *url)
 540 {
 541         html("<tr><td><a rel='vcs-git' href='");
 542         html_url_path(url);
 543         html("' title='");
 544         html_attr(ctx.repo->name);
 545         html(" Git repository'>");
 546         html_txt(url);
 547         html("</a></td></tr>\n");
 548 }
 549
 550 static int prepare_repo_cmd(void)
 551 {
 552         unsigned char sha1[20];
 553         int nongit = 0;
 554         int rc;
 555
 556         /* The path to the git repository. */
 557         setenv("GIT_DIR", ctx.repo->path, 1);
 558
 559         /* Do not look in /etc/ for gitconfig and gitattributes. */
 560         setenv("GIT_CONFIG_NOSYSTEM", "1", 1);
 561         setenv("GIT_ATTR_NOSYSTEM", "1", 1);
 562         unsetenv("HOME");
 563         unsetenv("XDG_CONFIG_HOME");
 564
 565         /* Setup the git directory and initialize the notes system. Both of these
 566          * load local configuration from the git repository, so we do them both while
 567          * the HOME variables are unset. */
 568         setup_git_directory_gently(&nongit);
 569         init_display_notes(NULL);
 570
 571         if (nongit) {
 572                 const char *name = ctx.repo->name;
 573                 rc = errno;
 574                 ctx.page.title = fmtalloc("%s - %s", ctx.cfg.root_title,
 575                                                 "config error");
 576                 ctx.repo = NULL;
 577                 cgit_print_http_headers();
 578                 cgit_print_docstart();
 579                 cgit_print_pageheader();
 580                 cgit_print_error("Failed to open %s: %s", name,
 581                                  rc ? strerror(rc) : "Not a valid git repository");
 582                 cgit_print_docend();
 583                 return 1;
 584         }
 585         ctx.page.title = fmtalloc("%s - %s", ctx.repo->name, ctx.repo->desc);
 586
 587         if (!ctx.repo->defbranch)
 588                 ctx.repo->defbranch = guess_defbranch();
 589
 590         if (!ctx.qry.head) {
 591                 ctx.qry.nohead = 1;
 592                 ctx.qry.head = find_default_branch(ctx.repo);
 593         }
 594
 595         if (!ctx.qry.head) {
 596                 cgit_print_http_headers();
 597                 cgit_print_docstart();
 598                 cgit_print_pageheader();
 599                 cgit_print_error("Repository seems to be empty");
 600                 if (!strcmp(ctx.qry.page, "summary")) {
 601                         html("<table class='list'><tr class='nohover'><td>&nbsp;</td></tr><tr class='nohover'><th class='left'>Clone</th></tr>\n");
 602                         cgit_prepare_repo_env(ctx.repo);
 603                         cgit_add_clone_urls(print_no_repo_clone_urls);
 604                         html("</table>\n");
 605                 }
 606                 cgit_print_docend();
 607                 return 1;
 608         }
 609
 610         if (get_sha1(ctx.qry.head, sha1)) {
 611                 char *tmp = xstrdup(ctx.qry.head);
 612                 ctx.qry.head = ctx.repo->defbranch;
 613                 ctx.page.status = 404;
 614                 ctx.page.statusmsg = "Not found";
 615                 cgit_print_http_headers();
 616                 cgit_print_docstart();
 617                 cgit_print_pageheader();
 618                 cgit_print_error("Invalid branch: %s", tmp);
 619                 cgit_print_docend();
 620                 free(tmp);
 621                 return 1;
 622         }
 623         string_list_sort(&ctx.repo->submodules);
 624         cgit_prepare_repo_env(ctx.repo);
 625         choose_readme(ctx.repo);
 626         return 0;
 627 }
 628
 629 static inline void open_auth_filter(const char *function)
 630 {
 631         cgit_open_filter(ctx.cfg.auth_filter, function,
 632                 ctx.env.http_cookie ? ctx.env.http_cookie : "",
 633                 ctx.env.request_method ? ctx.env.request_method : "",
 634                 ctx.env.query_string ? ctx.env.query_string : "",
 635                 ctx.env.http_referer ? ctx.env.http_referer : "",
 636                 ctx.env.path_info ? ctx.env.path_info : "",
 637                 ctx.env.http_host ? ctx.env.http_host : "",
 638                 ctx.env.https ? ctx.env.https : "",
 639                 ctx.qry.repo ? ctx.qry.repo : "",
 640                 ctx.qry.page ? ctx.qry.page : "",
 641                 ctx.qry.url ? ctx.qry.url : "",
 642                 cgit_loginurl());
 643 }
 644
 645 /* We intentionally keep this rather small, instead of looping and
 646  * feeding it to the filter a couple bytes at a time. This way, the
 647  * filter itself does not need to handle any denial of service or
 648  * buffer bloat issues. If this winds up being too small, people
 649  * will complain on the mailing list, and we'll increase it as needed. */
 650 #define MAX_AUTHENTICATION_POST_BYTES 4096
 651 /* The filter is expected to spit out "Status: " and all headers. */
 652 static inline void authenticate_post(void)
 653 {
 654         char buffer[MAX_AUTHENTICATION_POST_BYTES];
 655         int len;
 656
 657         open_auth_filter("authenticate-post");
 658         len = ctx.env.content_length;
 659         if (len > MAX_AUTHENTICATION_POST_BYTES)
 660                 len = MAX_AUTHENTICATION_POST_BYTES;
 661         if (read(STDIN_FILENO, buffer, len) < 0)
 662                 die_errno("Could not read POST from stdin");
 663         if (write(STDOUT_FILENO, buffer, len) < 0)
 664                 die_errno("Could not write POST to stdout");
 665         cgit_close_filter(ctx.cfg.auth_filter);
 666         exit(0);
 667 }
 668
 669 static inline void authenticate_cookie(void)
 670 {
 671         /* If we don't have an auth_filter, consider all cookies valid, and thus return early. */
 672         if (!ctx.cfg.auth_filter) {
 673                 ctx.env.authenticated = 1;
 674                 return;
 675         }
 676
 677         /* If we're having something POST'd to /login, we're authenticating POST,
 678          * instead of the cookie, so call authenticate_post and bail out early.
 679          * This pattern here should match /?p=login with POST. */
 680         if (ctx.env.request_method && ctx.qry.page && !ctx.repo && \
 681             !strcmp(ctx.env.request_method, "POST") && !strcmp(ctx.qry.page, "login")) {
 682                 authenticate_post();
 683                 return;
 684         }
 685
 686         /* If we've made it this far, we're authenticating the cookie for real, so do that. */
 687         open_auth_filter("authenticate-cookie");
 688         ctx.env.authenticated = cgit_close_filter(ctx.cfg.auth_filter);
 689 }
 690
 691 static void process_request(void)
 692 {
 693         struct cgit_cmd *cmd;
 694
 695         /* If we're not yet authenticated, no matter what page we're on,
 696          * display the authentication body from the auth_filter. This should
 697          * never be cached. */
 698         if (!ctx.env.authenticated) {
 699                 ctx.page.title = "Authentication Required";
 700                 cgit_print_http_headers();
 701                 cgit_print_docstart();
 702                 cgit_print_pageheader();
 703                 open_auth_filter("body");
 704                 cgit_close_filter(ctx.cfg.auth_filter);
 705                 cgit_print_docend();
 706                 return;
 707         }
 708
 709         cmd = cgit_get_cmd();
 710         if (!cmd) {
 711                 ctx.page.title = "cgit error";
 712                 ctx.page.status = 404;
 713                 ctx.page.statusmsg = "Not found";
 714                 cgit_print_http_headers();
 715                 cgit_print_docstart();
 716                 cgit_print_pageheader();
 717                 cgit_print_error("Invalid request");
 718                 cgit_print_docend();
 719                 return;
 720         }
 721
 722         if (!ctx.cfg.enable_http_clone && cmd->is_clone) {
 723                 html_status(404, "Not found", 0);
 724                 return;
 725         }
 726
 727         /* If cmd->want_vpath is set, assume ctx.qry.path contains a "virtual"
 728          * in-project path limit to be made available at ctx.qry.vpath.
 729          * Otherwise, no path limit is in effect (ctx.qry.vpath = NULL).
 730          */
 731         ctx.qry.vpath = cmd->want_vpath ? ctx.qry.path : NULL;
 732
 733         if (cmd->want_repo && !ctx.repo) {
 734                 cgit_print_http_headers();
 735                 cgit_print_docstart();
 736                 cgit_print_pageheader();
 737                 cgit_print_error("No repository selected");
 738                 cgit_print_docend();
 739                 return;
 740         }
 741
 742         if (ctx.repo && prepare_repo_cmd())
 743                 return;
 744
 745         if (cmd->want_layout) {
 746                 cgit_print_http_headers();
 747                 cgit_print_docstart();
 748                 cgit_print_pageheader();
 749         }
 750
 751         cmd->fn();
 752
 753         if (cmd->want_layout)
 754                 cgit_print_docend();
 755 }
 756
 757 static int cmp_repos(const void *a, const void *b)
 758 {
 759         const struct cgit_repo *ra = a, *rb = b;
 760         return strcmp(ra->url, rb->url);
 761 }
 762
 763 static char *build_snapshot_setting(int bitmap)
 764 {
 765         const struct cgit_snapshot_format *f;
 766         struct strbuf result = STRBUF_INIT;
 767
 768         for (f = cgit_snapshot_formats; f->suffix; f++) {
 769                 if (f->bit & bitmap) {
 770                         if (result.len)
 771                                 strbuf_addch(&result, ' ');
 772                         strbuf_addstr(&result, f->suffix);
 773                 }
 774         }
 775         return strbuf_detach(&result, NULL);
 776 }
 777
 778 static char *get_first_line(char *txt)
 779 {
 780         char *t = xstrdup(txt);
 781         char *p = strchr(t, '\n');
 782         if (p)
 783                 *p = '\0';
 784         return t;
 785 }
 786
 787 static void print_repo(FILE *f, struct cgit_repo *repo)
 788 {
 789         struct string_list_item *item;
 790         fprintf(f, "repo.url=%s\n", repo->url);
 791         fprintf(f, "repo.name=%s\n", repo->name);
 792         fprintf(f, "repo.path=%s\n", repo->path);
 793         if (repo->owner)
 794                 fprintf(f, "repo.owner=%s\n", repo->owner);
 795         if (repo->desc) {
 796                 char *tmp = get_first_line(repo->desc);
 797                 fprintf(f, "repo.desc=%s\n", tmp);
 798                 free(tmp);
 799         }
 800         for_each_string_list_item(item, &repo->readme) {
 801                 if (item->util)
 802                         fprintf(f, "repo.readme=%s:%s\n", (char *)item->util, item->string);
 803                 else
 804                         fprintf(f, "repo.readme=%s\n", item->string);
 805         }
 806         if (repo->defbranch)
 807                 fprintf(f, "repo.defbranch=%s\n", repo->defbranch);
 808         if (repo->module_link)
 809                 fprintf(f, "repo.module-link=%s\n", repo->module_link);
 810         if (repo->section)
 811                 fprintf(f, "repo.section=%s\n", repo->section);
 812         if (repo->clone_url)
 813                 fprintf(f, "repo.clone-url=%s\n", repo->clone_url);
 814         fprintf(f, "repo.enable-commit-graph=%d\n",
 815                 repo->enable_commit_graph);
 816         fprintf(f, "repo.enable-log-filecount=%d\n",
 817                 repo->enable_log_filecount);
 818         fprintf(f, "repo.enable-log-linecount=%d\n",
 819                 repo->enable_log_linecount);
 820         if (repo->about_filter && repo->about_filter != ctx.cfg.about_filter)
 821                 cgit_fprintf_filter(repo->about_filter, f, "repo.about-filter=");
 822         if (repo->commit_filter && repo->commit_filter != ctx.cfg.commit_filter)
 823                 cgit_fprintf_filter(repo->commit_filter, f, "repo.commit-filter=");
 824         if (repo->source_filter && repo->source_filter != ctx.cfg.source_filter)
 825                 cgit_fprintf_filter(repo->source_filter, f, "repo.source-filter=");
 826         if (repo->email_filter && repo->email_filter != ctx.cfg.email_filter)
 827                 cgit_fprintf_filter(repo->email_filter, f, "repo.email-filter=");
 828         if (repo->owner_filter && repo->owner_filter != ctx.cfg.owner_filter)
 829                 cgit_fprintf_filter(repo->owner_filter, f, "repo.owner-filter=");
 830         if (repo->snapshots != ctx.cfg.snapshots) {
 831                 char *tmp = build_snapshot_setting(repo->snapshots);
 832                 fprintf(f, "repo.snapshots=%s\n", tmp ? tmp : "");
 833                 free(tmp);
 834         }
 835         if (repo->max_stats != ctx.cfg.max_stats)
 836                 fprintf(f, "repo.max-stats=%s\n",
 837                         cgit_find_stats_periodname(repo->max_stats));
 838         if (repo->logo)
 839                 fprintf(f, "repo.logo=%s\n", repo->logo);
 840         if (repo->logo_link)
 841                 fprintf(f, "repo.logo-link=%s\n", repo->logo_link);
 842         fprintf(f, "repo.enable-remote-branches=%d\n", repo->enable_remote_branches);
 843         fprintf(f, "repo.enable-subject-links=%d\n", repo->enable_subject_links);
 844         if (repo->branch_sort == 1)
 845                 fprintf(f, "repo.branch-sort=age\n");
 846         if (repo->commit_sort) {
 847                 if (repo->commit_sort == 1)
 848                         fprintf(f, "repo.commit-sort=date\n");
 849                 else if (repo->commit_sort == 2)
 850                         fprintf(f, "repo.commit-sort=topo\n");
 851         }
 852         fprintf(f, "repo.hide=%d\n", repo->hide);
 853         fprintf(f, "repo.ignore=%d\n", repo->ignore);
 854         fprintf(f, "\n");
 855 }
 856
 857 static void print_repolist(FILE *f, struct cgit_repolist *list, int start)
 858 {
 859         int i;
 860
 861         for (i = start; i < list->count; i++)
 862                 print_repo(f, &list->repos[i]);
 863 }
 864
 865 /* Scan 'path' for git repositories, save the resulting repolist in 'cached_rc'
 866  * and return 0 on success.
 867  */
 868 static int generate_cached_repolist(const char *path, const char *cached_rc)
 869 {
 870         struct strbuf locked_rc = STRBUF_INIT;
 871         int result = 0;
 872         int idx;
 873         FILE *f;
 874
 875         strbuf_addf(&locked_rc, "%s.lock", cached_rc);
 876         f = fopen(locked_rc.buf, "wx");
 877         if (!f) {
 878                 /* Inform about the error unless the lockfile already existed,
 879                  * since that only means we've got concurrent requests.
 880                  */
 881                 result = errno;
 882                 if (result != EEXIST)
 883                         fprintf(stderr, "[cgit] Error opening %s: %s (%d)\n",
 884                                 locked_rc.buf, strerror(result), result);
 885                 goto out;
 886         }
 887         idx = cgit_repolist.count;
 888         if (ctx.cfg.project_list)
 889                 scan_projects(path, ctx.cfg.project_list, repo_config);
 890         else
 891                 scan_tree(path, repo_config);
 892         print_repolist(f, &cgit_repolist, idx);
 893         if (rename(locked_rc.buf, cached_rc))
 894                 fprintf(stderr, "[cgit] Error renaming %s to %s: %s (%d)\n",
 895                         locked_rc.buf, cached_rc, strerror(errno), errno);
 896         fclose(f);
 897 out:
 898         strbuf_release(&locked_rc);
 899         return result;
 900 }
 901
 902 static void process_cached_repolist(const char *path)
 903 {
 904         struct stat st;
 905         struct strbuf cached_rc = STRBUF_INIT;
 906         time_t age;
 907         unsigned long hash;
 908
 909         hash = hash_str(path);
 910         if (ctx.cfg.project_list)
 911                 hash += hash_str(ctx.cfg.project_list);
 912         strbuf_addf(&cached_rc, "%s/rc-%8lx", ctx.cfg.cache_root, hash);
 913
 914         if (stat(cached_rc.buf, &st)) {
 915                 /* Nothing is cached, we need to scan without forking. And
 916                  * if we fail to generate a cached repolist, we need to
 917                  * invoke scan_tree manually.
 918                  */
 919                 if (generate_cached_repolist(path, cached_rc.buf)) {
 920                         if (ctx.cfg.project_list)
 921                                 scan_projects(path, ctx.cfg.project_list,
 922                                               repo_config);
 923                         else
 924                                 scan_tree(path, repo_config);
 925                 }
 926                 goto out;
 927         }
 928
 929         parse_configfile(cached_rc.buf, config_cb);
 930
 931         /* If the cached configfile hasn't expired, lets exit now */
 932         age = time(NULL) - st.st_mtime;
 933         if (age <= (ctx.cfg.cache_scanrc_ttl * 60))
 934                 goto out;
 935
 936         /* The cached repolist has been parsed, but it was old. So lets
 937          * rescan the specified path and generate a new cached repolist
 938          * in a child-process to avoid latency for the current request.
 939          */
 940         if (fork())
 941                 goto out;
 942
 943         exit(generate_cached_repolist(path, cached_rc.buf));
 944 out:
 945         strbuf_release(&cached_rc);
 946 }
 947
 948 static void cgit_parse_args(int argc, const char **argv)
 949 {
 950         int i;
 951         int scan = 0;
 952
 953         for (i = 1; i < argc; i++) {
 954                 if (!strcmp(argv[i], "--version")) {
 955                         printf("CGit %s | http://git.zx2c4.com/cgit/\n\nCompiled in features:\n", CGIT_VERSION);
 956 #ifdef NO_LUA
 957                         printf("[-] ");
 958 #else
 959                         printf("[+] ");
 960 #endif
 961                         printf("Lua scripting\n");
 962 #ifndef HAVE_LINUX_SENDFILE
 963                         printf("[-] ");
 964 #else
 965                         printf("[+] ");
 966 #endif
 967                         printf("Linux sendfile() usage\n");
 968
 969                         exit(0);
 970                 }
 971                 if (starts_with(argv[i], "--cache=")) {
 972                         ctx.cfg.cache_root = xstrdup(argv[i] + 8);
 973                 } else if (!strcmp(argv[i], "--nocache")) {
 974                         ctx.cfg.nocache = 1;
 975                 } else if (!strcmp(argv[i], "--nohttp")) {
 976                         ctx.env.no_http = "1";
 977                 } else if (starts_with(argv[i], "--query=")) {
 978                         ctx.qry.raw = xstrdup(argv[i] + 8);
 979                 } else if (starts_with(argv[i], "--repo=")) {
 980                         ctx.qry.repo = xstrdup(argv[i] + 7);
 981                 } else if (starts_with(argv[i], "--page=")) {
 982                         ctx.qry.page = xstrdup(argv[i] + 7);
 983                 } else if (starts_with(argv[i], "--head=")) {
 984                         ctx.qry.head = xstrdup(argv[i] + 7);
 985                         ctx.qry.has_symref = 1;
 986                 } else if (starts_with(argv[i], "--sha1=")) {
 987                         ctx.qry.sha1 = xstrdup(argv[i] + 7);
 988                         ctx.qry.has_sha1 = 1;
 989                 } else if (starts_with(argv[i], "--ofs=")) {
 990                         ctx.qry.ofs = atoi(argv[i] + 6);
 991                 } else if (starts_with(argv[i], "--scan-tree=") ||
 992                            starts_with(argv[i], "--scan-path=")) {
 993                         /*
 994                          * HACK: The global snapshot bit mask defines the set
 995                          * of allowed snapshot formats, but the config file
 996                          * hasn't been parsed yet so the mask is currently 0.
 997                          * By setting all bits high before scanning we make
 998                          * sure that any in-repo cgitrc snapshot setting is
 999                          * respected by scan_tree().
1000                          *
1001                          * NOTE: We assume that there aren't more than 8
1002                          * different snapshot formats supported by cgit...
1003                          */
1004                         ctx.cfg.snapshots = 0xFF;
1005                         scan++;
1006                         scan_tree(argv[i] + 12, repo_config);
1007                 }
1008         }
1009         if (scan) {
1010                 qsort(cgit_repolist.repos, cgit_repolist.count,
1011                         sizeof(struct cgit_repo), cmp_repos);
1012                 print_repolist(stdout, &cgit_repolist, 0);
1013                 exit(0);
1014         }
1015 }
1016
1017 static int calc_ttl(void)
1018 {
1019         if (!ctx.repo)
1020                 return ctx.cfg.cache_root_ttl;
1021
1022         if (!ctx.qry.page)
1023                 return ctx.cfg.cache_repo_ttl;
1024
1025         if (!strcmp(ctx.qry.page, "about"))
1026                 return ctx.cfg.cache_about_ttl;
1027
1028         if (!strcmp(ctx.qry.page, "snapshot"))
1029                 return ctx.cfg.cache_snapshot_ttl;
1030
1031         if (ctx.qry.has_sha1)
1032                 return ctx.cfg.cache_static_ttl;
1033
1034         if (ctx.qry.has_symref)
1035                 return ctx.cfg.cache_dynamic_ttl;
1036
1037         return ctx.cfg.cache_repo_ttl;
1038 }
1039
1040 int main(int argc, const char **argv)
1041 {
1042         const char *path;
1043         int err, ttl;
1044
1045         cgit_init_filters();
1046         atexit(cgit_cleanup_filters);
1047
1048         prepare_context();
1049         cgit_repolist.length = 0;
1050         cgit_repolist.count = 0;
1051         cgit_repolist.repos = NULL;
1052
1053         cgit_parse_args(argc, argv);
1054         parse_configfile(expand_macros(ctx.env.cgit_config), config_cb);
1055         ctx.repo = NULL;
1056         http_parse_querystring(ctx.qry.raw, querystring_cb);
1057
1058         /* If virtual-root isn't specified in cgitrc, lets pretend
1059          * that virtual-root equals SCRIPT_NAME, minus any possibly
1060          * trailing slashes.
1061          */
1062         if (!ctx.cfg.virtual_root && ctx.cfg.script_name)
1063                 ctx.cfg.virtual_root = ensure_end(ctx.cfg.script_name, '/');
1064
1065         /* If no url parameter is specified on the querystring, lets
1066          * use PATH_INFO as url. This allows cgit to work with virtual
1067          * urls without the need for rewriterules in the webserver (as
1068          * long as PATH_INFO is included in the cache lookup key).
1069          */
1070         path = ctx.env.path_info;
1071         if (!ctx.qry.url && path) {
1072                 if (path[0] == '/')
1073                         path++;
1074                 ctx.qry.url = xstrdup(path);
1075                 if (ctx.qry.raw) {
1076                         char *newqry = fmtalloc("%s?%s", path, ctx.qry.raw);
1077                         free(ctx.qry.raw);
1078                         ctx.qry.raw = newqry;
1079                 } else
1080                         ctx.qry.raw = xstrdup(ctx.qry.url);
1081                 cgit_parse_url(ctx.qry.url);
1082         }
1083
1084         /* Before we go any further, we set ctx.env.authenticated by checking to see
1085          * if the supplied cookie is valid. All cookies are valid if there is no
1086          * auth_filter. If there is an auth_filter, the filter decides. */
1087         authenticate_cookie();
1088
1089         ttl = calc_ttl();
1090         if (ttl < 0)
1091                 ctx.page.expires += 10 * 365 * 24 * 60 * 60; /* 10 years */
1092         else
1093                 ctx.page.expires += ttl * 60;
1094         if (!ctx.env.authenticated || (ctx.env.request_method && !strcmp(ctx.env.request_method, "HEAD")))
1095                 ctx.cfg.nocache = 1;
1096         if (ctx.cfg.nocache)
1097                 ctx.cfg.cache_size = 0;
1098         err = cache_process(ctx.cfg.cache_size, ctx.cfg.cache_root,
1099                             ctx.qry.raw, ttl, process_request);
1100         cgit_cleanup_filters();
1101         if (err)
1102                 cgit_print_error("Error processing page: %s (%d)",
1103                                  strerror(err), err);
1104         return err;
1105 }