cgit.c

   1 /* cgit.c: cgi for the git scm
   2  *
   3  * Copyright (C) 2006 Lars Hjemli
   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 "scan-tree.h"
  17
  18 const char *cgit_version = CGIT_VERSION;
  19
  20 void add_mimetype(const char *name, const char *value)
  21 {
  22         struct string_list_item *item;
  23
  24         item = string_list_insert(xstrdup(name), &ctx.cfg.mimetypes);
  25         item->util = xstrdup(value);
  26 }
  27
  28 struct cgit_filter *new_filter(const char *cmd, int extra_args)
  29 {
  30         struct cgit_filter *f;
  31
  32         if (!cmd || !cmd[0])
  33                 return NULL;
  34
  35         f = xmalloc(sizeof(struct cgit_filter));
  36         f->cmd = xstrdup(cmd);
  37         f->argv = xmalloc((2 + extra_args) * sizeof(char *));
  38         f->argv[0] = f->cmd;
  39         f->argv[1] = NULL;
  40         return f;
  41 }
  42
  43 void config_cb(const char *name, const char *value)
  44 {
  45         if (!strcmp(name, "root-title"))
  46                 ctx.cfg.root_title = xstrdup(value);
  47         else if (!strcmp(name, "root-desc"))
  48                 ctx.cfg.root_desc = xstrdup(value);
  49         else if (!strcmp(name, "root-readme"))
  50                 ctx.cfg.root_readme = xstrdup(value);
  51         else if (!strcmp(name, "css"))
  52                 ctx.cfg.css = xstrdup(value);
  53         else if (!strcmp(name, "favicon"))
  54                 ctx.cfg.favicon = xstrdup(value);
  55         else if (!strcmp(name, "footer"))
  56                 ctx.cfg.footer = xstrdup(value);
  57         else if (!strcmp(name, "head-include"))
  58                 ctx.cfg.head_include = xstrdup(value);
  59         else if (!strcmp(name, "header"))
  60                 ctx.cfg.header = xstrdup(value);
  61         else if (!strcmp(name, "logo"))
  62                 ctx.cfg.logo = xstrdup(value);
  63         else if (!strcmp(name, "index-header"))
  64                 ctx.cfg.index_header = xstrdup(value);
  65         else if (!strcmp(name, "index-info"))
  66                 ctx.cfg.index_info = xstrdup(value);
  67         else if (!strcmp(name, "logo-link"))
  68                 ctx.cfg.logo_link = xstrdup(value);
  69         else if (!strcmp(name, "module-link"))
  70                 ctx.cfg.module_link = xstrdup(value);
  71         else if (!strcmp(name, "virtual-root")) {
  72                 ctx.cfg.virtual_root = trim_end(value, '/');
  73                 if (!ctx.cfg.virtual_root && (!strcmp(value, "/")))
  74                         ctx.cfg.virtual_root = "";
  75         } else if (!strcmp(name, "nocache"))
  76                 ctx.cfg.nocache = atoi(value);
  77         else if (!strcmp(name, "noplainemail"))
  78                 ctx.cfg.noplainemail = atoi(value);
  79         else if (!strcmp(name, "noheader"))
  80                 ctx.cfg.noheader = atoi(value);
  81         else if (!strcmp(name, "snapshots"))
  82                 ctx.cfg.snapshots = cgit_parse_snapshots_mask(value);
  83         else if (!strcmp(name, "enable-index-links"))
  84                 ctx.cfg.enable_index_links = atoi(value);
  85         else if (!strcmp(name, "enable-log-filecount"))
  86                 ctx.cfg.enable_log_filecount = atoi(value);
  87         else if (!strcmp(name, "enable-log-linecount"))
  88                 ctx.cfg.enable_log_linecount = atoi(value);
  89         else if (!strcmp(name, "enable-tree-linenumbers"))
  90                 ctx.cfg.enable_tree_linenumbers = atoi(value);
  91         else if (!strcmp(name, "max-stats"))
  92                 ctx.cfg.max_stats = cgit_find_stats_period(value, NULL);
  93         else if (!strcmp(name, "cache-size"))
  94                 ctx.cfg.cache_size = atoi(value);
  95         else if (!strcmp(name, "cache-root"))
  96                 ctx.cfg.cache_root = xstrdup(value);
  97         else if (!strcmp(name, "cache-root-ttl"))
  98                 ctx.cfg.cache_root_ttl = atoi(value);
  99         else if (!strcmp(name, "cache-repo-ttl"))
 100                 ctx.cfg.cache_repo_ttl = atoi(value);
 101         else if (!strcmp(name, "cache-static-ttl"))
 102                 ctx.cfg.cache_static_ttl = atoi(value);
 103         else if (!strcmp(name, "cache-dynamic-ttl"))
 104                 ctx.cfg.cache_dynamic_ttl = atoi(value);
 105         else if (!strcmp(name, "about-filter"))
 106                 ctx.cfg.about_filter = new_filter(value, 0);
 107         else if (!strcmp(name, "commit-filter"))
 108                 ctx.cfg.commit_filter = new_filter(value, 0);
 109         else if (!strcmp(name, "embedded"))
 110                 ctx.cfg.embedded = atoi(value);
 111         else if (!strcmp(name, "max-message-length"))
 112                 ctx.cfg.max_msg_len = atoi(value);
 113         else if (!strcmp(name, "max-repodesc-length"))
 114                 ctx.cfg.max_repodesc_len = atoi(value);
 115         else if (!strcmp(name, "max-repo-count"))
 116                 ctx.cfg.max_repo_count = atoi(value);
 117         else if (!strcmp(name, "max-commit-count"))
 118                 ctx.cfg.max_commit_count = atoi(value);
 119         else if (!strcmp(name, "source-filter"))
 120                 ctx.cfg.source_filter = new_filter(value, 1);
 121         else if (!strcmp(name, "summary-log"))
 122                 ctx.cfg.summary_log = atoi(value);
 123         else if (!strcmp(name, "summary-branches"))
 124                 ctx.cfg.summary_branches = atoi(value);
 125         else if (!strcmp(name, "summary-tags"))
 126                 ctx.cfg.summary_tags = atoi(value);
 127         else if (!strcmp(name, "agefile"))
 128                 ctx.cfg.agefile = xstrdup(value);
 129         else if (!strcmp(name, "renamelimit"))
 130                 ctx.cfg.renamelimit = atoi(value);
 131         else if (!strcmp(name, "robots"))
 132                 ctx.cfg.robots = xstrdup(value);
 133         else if (!strcmp(name, "clone-prefix"))
 134                 ctx.cfg.clone_prefix = xstrdup(value);
 135         else if (!strcmp(name, "local-time"))
 136                 ctx.cfg.local_time = atoi(value);
 137         else if (!prefixcmp(name, "mimetype."))
 138                 add_mimetype(name + 9, value);
 139         else if (!strcmp(name, "repo.group"))
 140                 ctx.cfg.repo_group = xstrdup(value);
 141         else if (!strcmp(name, "repo.url"))
 142                 ctx.repo = cgit_add_repo(value);
 143         else if (!strcmp(name, "repo.name"))
 144                 ctx.repo->name = xstrdup(value);
 145         else if (ctx.repo && !strcmp(name, "repo.path"))
 146                 ctx.repo->path = trim_end(value, '/');
 147         else if (ctx.repo && !strcmp(name, "repo.clone-url"))
 148                 ctx.repo->clone_url = xstrdup(value);
 149         else if (ctx.repo && !strcmp(name, "repo.desc"))
 150                 ctx.repo->desc = xstrdup(value);
 151         else if (ctx.repo && !strcmp(name, "repo.owner"))
 152                 ctx.repo->owner = xstrdup(value);
 153         else if (ctx.repo && !strcmp(name, "repo.defbranch"))
 154                 ctx.repo->defbranch = xstrdup(value);
 155         else if (ctx.repo && !strcmp(name, "repo.snapshots"))
 156                 ctx.repo->snapshots = ctx.cfg.snapshots & cgit_parse_snapshots_mask(value); /* XXX: &? */
 157         else if (ctx.repo && !strcmp(name, "repo.enable-log-filecount"))
 158                 ctx.repo->enable_log_filecount = ctx.cfg.enable_log_filecount * atoi(value);
 159         else if (ctx.repo && !strcmp(name, "repo.enable-log-linecount"))
 160                 ctx.repo->enable_log_linecount = ctx.cfg.enable_log_linecount * atoi(value);
 161         else if (ctx.repo && !strcmp(name, "repo.max-stats"))
 162                 ctx.repo->max_stats = cgit_find_stats_period(value, NULL);
 163         else if (ctx.repo && !strcmp(name, "repo.module-link"))
 164                 ctx.repo->module_link= xstrdup(value);
 165         else if (ctx.repo && !strcmp(name, "repo.about-filter"))
 166                 ctx.repo->about_filter = new_filter(value, 0);
 167         else if (ctx.repo && !strcmp(name, "repo.commit-filter"))
 168                 ctx.repo->commit_filter = new_filter(value, 0);
 169         else if (ctx.repo && !strcmp(name, "repo.source-filter"))
 170                 ctx.repo->source_filter = new_filter(value, 1);
 171         else if (ctx.repo && !strcmp(name, "repo.readme") && value != NULL) {
 172                 if (*value == '/')
 173                         ctx.repo->readme = xstrdup(value);
 174                 else
 175                         ctx.repo->readme = xstrdup(fmt("%s/%s", ctx.repo->path, value));
 176         } else if (!strcmp(name, "include"))
 177                 parse_configfile(value, config_cb);
 178 }
 179
 180 static void querystring_cb(const char *name, const char *value)
 181 {
 182         if (!value)
 183                 value = "";
 184
 185         if (!strcmp(name,"r")) {
 186                 ctx.qry.repo = xstrdup(value);
 187                 ctx.repo = cgit_get_repoinfo(value);
 188         } else if (!strcmp(name, "p")) {
 189                 ctx.qry.page = xstrdup(value);
 190         } else if (!strcmp(name, "url")) {
 191                 ctx.qry.url = xstrdup(value);
 192                 cgit_parse_url(value);
 193         } else if (!strcmp(name, "qt")) {
 194                 ctx.qry.grep = xstrdup(value);
 195         } else if (!strcmp(name, "q")) {
 196                 ctx.qry.search = xstrdup(value);
 197         } else if (!strcmp(name, "h")) {
 198                 ctx.qry.head = xstrdup(value);
 199                 ctx.qry.has_symref = 1;
 200         } else if (!strcmp(name, "id")) {
 201                 ctx.qry.sha1 = xstrdup(value);
 202                 ctx.qry.has_sha1 = 1;
 203         } else if (!strcmp(name, "id2")) {
 204                 ctx.qry.sha2 = xstrdup(value);
 205                 ctx.qry.has_sha1 = 1;
 206         } else if (!strcmp(name, "ofs")) {
 207                 ctx.qry.ofs = atoi(value);
 208         } else if (!strcmp(name, "path")) {
 209                 ctx.qry.path = trim_end(value, '/');
 210         } else if (!strcmp(name, "name")) {
 211                 ctx.qry.name = xstrdup(value);
 212         } else if (!strcmp(name, "mimetype")) {
 213                 ctx.qry.mimetype = xstrdup(value);
 214         } else if (!strcmp(name, "s")){
 215                 ctx.qry.sort = xstrdup(value);
 216         } else if (!strcmp(name, "showmsg")) {
 217                 ctx.qry.showmsg = atoi(value);
 218         } else if (!strcmp(name, "period")) {
 219                 ctx.qry.period = xstrdup(value);
 220         }
 221 }
 222
 223 char *xstrdupn(const char *str)
 224 {
 225         return (str ? xstrdup(str) : NULL);
 226 }
 227
 228 static void prepare_context(struct cgit_context *ctx)
 229 {
 230         memset(ctx, 0, sizeof(ctx));
 231         ctx->cfg.agefile = "info/web/last-modified";
 232         ctx->cfg.nocache = 0;
 233         ctx->cfg.cache_size = 0;
 234         ctx->cfg.cache_dynamic_ttl = 5;
 235         ctx->cfg.cache_max_create_time = 5;
 236         ctx->cfg.cache_repo_ttl = 5;
 237         ctx->cfg.cache_root = CGIT_CACHE_ROOT;
 238         ctx->cfg.cache_root_ttl = 5;
 239         ctx->cfg.cache_static_ttl = -1;
 240         ctx->cfg.css = "/cgit.css";
 241         ctx->cfg.logo = "/cgit.png";
 242         ctx->cfg.local_time = 0;
 243         ctx->cfg.enable_tree_linenumbers = 1;
 244         ctx->cfg.max_repo_count = 50;
 245         ctx->cfg.max_commit_count = 50;
 246         ctx->cfg.max_lock_attempts = 5;
 247         ctx->cfg.max_msg_len = 80;
 248         ctx->cfg.max_repodesc_len = 80;
 249         ctx->cfg.max_stats = 0;
 250         ctx->cfg.module_link = "./?repo=%s&page=commit&id=%s";
 251         ctx->cfg.renamelimit = -1;
 252         ctx->cfg.robots = "index, nofollow";
 253         ctx->cfg.root_title = "Git repository browser";
 254         ctx->cfg.root_desc = "a fast webinterface for the git dscm";
 255         ctx->cfg.script_name = CGIT_SCRIPT_NAME;
 256         ctx->cfg.summary_branches = 10;
 257         ctx->cfg.summary_log = 10;
 258         ctx->cfg.summary_tags = 10;
 259         ctx->env.cgit_config = xstrdupn(getenv("CGIT_CONFIG"));
 260         ctx->env.http_host = xstrdupn(getenv("HTTP_HOST"));
 261         ctx->env.https = xstrdupn(getenv("HTTPS"));
 262         ctx->env.no_http = xstrdupn(getenv("NO_HTTP"));
 263         ctx->env.path_info = xstrdupn(getenv("PATH_INFO"));
 264         ctx->env.query_string = xstrdupn(getenv("QUERY_STRING"));
 265         ctx->env.request_method = xstrdupn(getenv("REQUEST_METHOD"));
 266         ctx->env.script_name = xstrdupn(getenv("SCRIPT_NAME"));
 267         ctx->env.server_name = xstrdupn(getenv("SERVER_NAME"));
 268         ctx->env.server_port = xstrdupn(getenv("SERVER_PORT"));
 269         ctx->page.mimetype = "text/html";
 270         ctx->page.charset = PAGE_ENCODING;
 271         ctx->page.filename = NULL;
 272         ctx->page.size = 0;
 273         ctx->page.modified = time(NULL);
 274         ctx->page.expires = ctx->page.modified;
 275         ctx->page.etag = NULL;
 276         memset(&ctx->cfg.mimetypes, 0, sizeof(struct string_list));
 277         if (ctx->env.script_name)
 278                 ctx->cfg.script_name = ctx->env.script_name;
 279         if (ctx->env.query_string)
 280                 ctx->qry.raw = ctx->env.query_string;
 281         if (!ctx->env.cgit_config)
 282                 ctx->env.cgit_config = CGIT_CONFIG;
 283 }
 284
 285 struct refmatch {
 286         char *req_ref;
 287         char *first_ref;
 288         int match;
 289 };
 290
 291 int find_current_ref(const char *refname, const unsigned char *sha1,
 292                      int flags, void *cb_data)
 293 {
 294         struct refmatch *info;
 295
 296         info = (struct refmatch *)cb_data;
 297         if (!strcmp(refname, info->req_ref))
 298                 info->match = 1;
 299         if (!info->first_ref)
 300                 info->first_ref = xstrdup(refname);
 301         return info->match;
 302 }
 303
 304 char *find_default_branch(struct cgit_repo *repo)
 305 {
 306         struct refmatch info;
 307         char *ref;
 308
 309         info.req_ref = repo->defbranch;
 310         info.first_ref = NULL;
 311         info.match = 0;
 312         for_each_branch_ref(find_current_ref, &info);
 313         if (info.match)
 314                 ref = info.req_ref;
 315         else
 316                 ref = info.first_ref;
 317         if (ref)
 318                 ref = xstrdup(ref);
 319         return ref;
 320 }
 321
 322 static int prepare_repo_cmd(struct cgit_context *ctx)
 323 {
 324         char *tmp;
 325         unsigned char sha1[20];
 326         int nongit = 0;
 327
 328         setenv("GIT_DIR", ctx->repo->path, 1);
 329         setup_git_directory_gently(&nongit);
 330         if (nongit) {
 331                 ctx->page.title = fmt("%s - %s", ctx->cfg.root_title,
 332                                       "config error");
 333                 tmp = fmt("Not a git repository: '%s'", ctx->repo->path);
 334                 ctx->repo = NULL;
 335                 cgit_print_http_headers(ctx);
 336                 cgit_print_docstart(ctx);
 337                 cgit_print_pageheader(ctx);
 338                 cgit_print_error(tmp);
 339                 cgit_print_docend();
 340                 return 1;
 341         }
 342         ctx->page.title = fmt("%s - %s", ctx->repo->name, ctx->repo->desc);
 343
 344         if (!ctx->qry.head) {
 345                 ctx->qry.nohead = 1;
 346                 ctx->qry.head = find_default_branch(ctx->repo);
 347                 ctx->repo->defbranch = ctx->qry.head;
 348         }
 349
 350         if (!ctx->qry.head) {
 351                 cgit_print_http_headers(ctx);
 352                 cgit_print_docstart(ctx);
 353                 cgit_print_pageheader(ctx);
 354                 cgit_print_error("Repository seems to be empty");
 355                 cgit_print_docend();
 356                 return 1;
 357         }
 358
 359         if (get_sha1(ctx->qry.head, sha1)) {
 360                 tmp = xstrdup(ctx->qry.head);
 361                 ctx->qry.head = ctx->repo->defbranch;
 362                 ctx->page.status = 404;
 363                 ctx->page.statusmsg = "not found";
 364                 cgit_print_http_headers(ctx);
 365                 cgit_print_docstart(ctx);
 366                 cgit_print_pageheader(ctx);
 367                 cgit_print_error(fmt("Invalid branch: %s", tmp));
 368                 cgit_print_docend();
 369                 return 1;
 370         }
 371         return 0;
 372 }
 373
 374 static void process_request(void *cbdata)
 375 {
 376         struct cgit_context *ctx = cbdata;
 377         struct cgit_cmd *cmd;
 378
 379         cmd = cgit_get_cmd(ctx);
 380         if (!cmd) {
 381                 ctx->page.title = "cgit error";
 382                 cgit_print_http_headers(ctx);
 383                 cgit_print_docstart(ctx);
 384                 cgit_print_pageheader(ctx);
 385                 cgit_print_error("Invalid request");
 386                 cgit_print_docend();
 387                 return;
 388         }
 389
 390         if (cmd->want_repo && !ctx->repo) {
 391                 cgit_print_http_headers(ctx);
 392                 cgit_print_docstart(ctx);
 393                 cgit_print_pageheader(ctx);
 394                 cgit_print_error(fmt("No repository selected"));
 395                 cgit_print_docend();
 396                 return;
 397         }
 398
 399         if (ctx->repo && prepare_repo_cmd(ctx))
 400                 return;
 401
 402         if (cmd->want_layout) {
 403                 cgit_print_http_headers(ctx);
 404                 cgit_print_docstart(ctx);
 405                 cgit_print_pageheader(ctx);
 406         }
 407
 408         cmd->fn(ctx);
 409
 410         if (cmd->want_layout)
 411                 cgit_print_docend();
 412 }
 413
 414 int cmp_repos(const void *a, const void *b)
 415 {
 416         const struct cgit_repo *ra = a, *rb = b;
 417         return strcmp(ra->url, rb->url);
 418 }
 419
 420 void print_repo(struct cgit_repo *repo)
 421 {
 422         printf("repo.url=%s\n", repo->url);
 423         printf("repo.name=%s\n", repo->name);
 424         printf("repo.path=%s\n", repo->path);
 425         if (repo->owner)
 426                 printf("repo.owner=%s\n", repo->owner);
 427         if (repo->desc)
 428                 printf("repo.desc=%s\n", repo->desc);
 429         if (repo->readme)
 430                 printf("repo.readme=%s\n", repo->readme);
 431         printf("\n");
 432 }
 433
 434 void print_repolist(struct cgit_repolist *list)
 435 {
 436         int i;
 437
 438         for(i = 0; i < list->count; i++)
 439                 print_repo(&list->repos[i]);
 440 }
 441
 442
 443 static void cgit_parse_args(int argc, const char **argv)
 444 {
 445         int i;
 446         int scan = 0;
 447
 448         for (i = 1; i < argc; i++) {
 449                 if (!strncmp(argv[i], "--cache=", 8)) {
 450                         ctx.cfg.cache_root = xstrdup(argv[i]+8);
 451                 }
 452                 if (!strcmp(argv[i], "--nocache")) {
 453                         ctx.cfg.nocache = 1;
 454                 }
 455                 if (!strcmp(argv[i], "--nohttp")) {
 456                         ctx.env.no_http = "1";
 457                 }
 458                 if (!strncmp(argv[i], "--query=", 8)) {
 459                         ctx.qry.raw = xstrdup(argv[i]+8);
 460                 }
 461                 if (!strncmp(argv[i], "--repo=", 7)) {
 462                         ctx.qry.repo = xstrdup(argv[i]+7);
 463                 }
 464                 if (!strncmp(argv[i], "--page=", 7)) {
 465                         ctx.qry.page = xstrdup(argv[i]+7);
 466                 }
 467                 if (!strncmp(argv[i], "--head=", 7)) {
 468                         ctx.qry.head = xstrdup(argv[i]+7);
 469                         ctx.qry.has_symref = 1;
 470                 }
 471                 if (!strncmp(argv[i], "--sha1=", 7)) {
 472                         ctx.qry.sha1 = xstrdup(argv[i]+7);
 473                         ctx.qry.has_sha1 = 1;
 474                 }
 475                 if (!strncmp(argv[i], "--ofs=", 6)) {
 476                         ctx.qry.ofs = atoi(argv[i]+6);
 477                 }
 478                 if (!strncmp(argv[i], "--scan-tree=", 12)) {
 479                         scan++;
 480                         scan_tree(argv[i] + 12);
 481                 }
 482         }
 483         if (scan) {
 484                 qsort(cgit_repolist.repos, cgit_repolist.count,
 485                         sizeof(struct cgit_repo), cmp_repos);
 486                 print_repolist(&cgit_repolist);
 487                 exit(0);
 488         }
 489 }
 490
 491 static int calc_ttl()
 492 {
 493         if (!ctx.repo)
 494                 return ctx.cfg.cache_root_ttl;
 495
 496         if (!ctx.qry.page)
 497                 return ctx.cfg.cache_repo_ttl;
 498
 499         if (ctx.qry.has_symref)
 500                 return ctx.cfg.cache_dynamic_ttl;
 501
 502         if (ctx.qry.has_sha1)
 503                 return ctx.cfg.cache_static_ttl;
 504
 505         return ctx.cfg.cache_repo_ttl;
 506 }
 507
 508 int main(int argc, const char **argv)
 509 {
 510         const char *path;
 511         char *qry;
 512         int err, ttl;
 513
 514         prepare_context(&ctx);
 515         cgit_repolist.length = 0;
 516         cgit_repolist.count = 0;
 517         cgit_repolist.repos = NULL;
 518
 519         cgit_parse_args(argc, argv);
 520         parse_configfile(ctx.env.cgit_config, config_cb);
 521         ctx.repo = NULL;
 522         http_parse_querystring(ctx.qry.raw, querystring_cb);
 523
 524         /* If virtual-root isn't specified in cgitrc, lets pretend
 525          * that virtual-root equals SCRIPT_NAME.
 526          */
 527         if (!ctx.cfg.virtual_root)
 528                 ctx.cfg.virtual_root = ctx.cfg.script_name;
 529
 530         /* If no url parameter is specified on the querystring, lets
 531          * use PATH_INFO as url. This allows cgit to work with virtual
 532          * urls without the need for rewriterules in the webserver (as
 533          * long as PATH_INFO is included in the cache lookup key).
 534          */
 535         path = ctx.env.path_info;
 536         if (!ctx.qry.url && path) {
 537                 if (path[0] == '/')
 538                         path++;
 539                 ctx.qry.url = xstrdup(path);
 540                 if (ctx.qry.raw) {
 541                         qry = ctx.qry.raw;
 542                         ctx.qry.raw = xstrdup(fmt("%s?%s", path, qry));
 543                         free(qry);
 544                 } else
 545                         ctx.qry.raw = xstrdup(ctx.qry.url);
 546                 cgit_parse_url(ctx.qry.url);
 547         }
 548
 549         ttl = calc_ttl();
 550         ctx.page.expires += ttl*60;
 551         if (ctx.env.request_method && !strcmp(ctx.env.request_method, "HEAD"))
 552                 ctx.cfg.nocache = 1;
 553         if (ctx.cfg.nocache)
 554                 ctx.cfg.cache_size = 0;
 555         err = cache_process(ctx.cfg.cache_size, ctx.cfg.cache_root,
 556                             ctx.qry.raw, ttl, process_request, &ctx);
 557         if (err)
 558                 cgit_print_error(fmt("Error processing page: %s (%d)",
 559                                      strerror(err), err));
 560         return err;
 561 }