gitweb.ps.run Git - ps-cgit/blob - 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 #define USE_THE_REPOSITORY_VARIABLE
  10
  11 #include "cgit.h"
  12 #include "cache.h"
  13 #include "cmd.h"
  14 #include "configfile.h"
  15 #include "html.h"
  16 #include "ui-shared.h"
  17 #include "ui-stats.h"
  18 #include "ui-blob.h"
  19 #include "ui-summary.h"
  20 #include "scan-tree.h"
  21
  22 const char *cgit_version = CGIT_VERSION;
  23
  24 __attribute__((constructor))
  25 static void constructor_environment()
  26 {
  27         /* Do not look in /etc/ for gitconfig and gitattributes. */
  28         setenv("GIT_CONFIG_NOSYSTEM", "1", 1);
  29         setenv("GIT_ATTR_NOSYSTEM", "1", 1);
  30         unsetenv("HOME");
  31         unsetenv("XDG_CONFIG_HOME");
  32 }
  33
  34 static void add_mimetype(const char *name, const char *value)
  35 {
  36         struct string_list_item *item;
  37
  38         item = string_list_insert(&ctx.cfg.mimetypes, name);
  39         item->util = xstrdup(value);
  40 }
  41
  42 static void process_cached_repolist(const char *path);
  43
  44 static void repo_config(struct cgit_repo *repo, const char *name, const char *value)
  45 {
  46         const char *path;
  47         struct string_list_item *item;
  48
  49         if (!strcmp(name, "name"))
  50                 repo->name = xstrdup(value);
  51         else if (!strcmp(name, "clone-url"))
  52                 repo->clone_url = xstrdup(value);
  53         else if (!strcmp(name, "desc"))
  54                 repo->desc = xstrdup(value);
  55         else if (!strcmp(name, "owner"))
  56                 repo->owner = xstrdup(value);
  57         else if (!strcmp(name, "homepage"))
  58                 repo->homepage = xstrdup(value);
  59         else if (!strcmp(name, "defbranch"))
  60                 repo->defbranch = xstrdup(value);
  61         else if (!strcmp(name, "extra-head-content"))
  62                 repo->extra_head_content = xstrdup(value);
  63         else if (!strcmp(name, "snapshots"))
  64                 repo->snapshots = ctx.cfg.snapshots & cgit_parse_snapshots_mask(value);
  65         else if (!strcmp(name, "enable-blame"))
  66                 repo->enable_blame = atoi(value);
  67         else if (!strcmp(name, "enable-commit-graph"))
  68                 repo->enable_commit_graph = atoi(value);
  69         else if (!strcmp(name, "enable-log-filecount"))
  70                 repo->enable_log_filecount = atoi(value);
  71         else if (!strcmp(name, "enable-log-linecount"))
  72                 repo->enable_log_linecount = atoi(value);
  73         else if (!strcmp(name, "enable-remote-branches"))
  74                 repo->enable_remote_branches = atoi(value);
  75         else if (!strcmp(name, "enable-subject-links"))
  76                 repo->enable_subject_links = atoi(value);
  77         else if (!strcmp(name, "enable-html-serving"))
  78                 repo->enable_html_serving = atoi(value);
  79         else if (!strcmp(name, "branch-sort")) {
  80                 if (!strcmp(value, "age"))
  81                         repo->branch_sort = 1;
  82                 if (!strcmp(value, "name"))
  83                         repo->branch_sort = 0;
  84         } else if (!strcmp(name, "commit-sort")) {
  85                 if (!strcmp(value, "date"))
  86                         repo->commit_sort = 1;
  87                 if (!strcmp(value, "topo"))
  88                         repo->commit_sort = 2;
  89         } else if (!strcmp(name, "max-stats"))
  90                 repo->max_stats = cgit_find_stats_period(value, NULL);
  91         else if (!strcmp(name, "module-link"))
  92                 repo->module_link= xstrdup(value);
  93         else if (skip_prefix(name, "module-link.", &path)) {
  94                 item = string_list_append(&repo->submodules, xstrdup(path));
  95                 item->util = xstrdup(value);
  96         } else if (!strcmp(name, "section"))
  97                 repo->section = xstrdup(value);
  98         else if (!strcmp(name, "snapshot-prefix"))
  99                 repo->snapshot_prefix = xstrdup(value);
 100         else if (!strcmp(name, "readme") && value != NULL) {
 101                 if (repo->readme.items == ctx.cfg.readme.items)
 102                         memset(&repo->readme, 0, sizeof(repo->readme));
 103                 string_list_append(&repo->readme, xstrdup(value));
 104         } else if (!strcmp(name, "logo") && value != NULL)
 105                 repo->logo = xstrdup(value);
 106         else if (!strcmp(name, "logo-link") && value != NULL)
 107                 repo->logo_link = xstrdup(value);
 108         else if (!strcmp(name, "hide"))
 109                 repo->hide = atoi(value);
 110         else if (!strcmp(name, "ignore"))
 111                 repo->ignore = atoi(value);
 112         else if (ctx.cfg.enable_filter_overrides) {
 113                 if (!strcmp(name, "about-filter"))
 114                         repo->about_filter = cgit_new_filter(value, ABOUT);
 115                 else if (!strcmp(name, "commit-filter"))
 116                         repo->commit_filter = cgit_new_filter(value, COMMIT);
 117                 else if (!strcmp(name, "source-filter"))
 118                         repo->source_filter = cgit_new_filter(value, SOURCE);
 119                 else if (!strcmp(name, "email-filter"))
 120                         repo->email_filter = cgit_new_filter(value, EMAIL);
 121                 else if (!strcmp(name, "owner-filter"))
 122                         repo->owner_filter = cgit_new_filter(value, OWNER);
 123         }
 124 }
 125
 126 static void config_cb(const char *name, const char *value)
 127 {
 128         const char *arg;
 129
 130         if (!strcmp(name, "section"))
 131                 ctx.cfg.section = xstrdup(value);
 132         else if (!strcmp(name, "repo.url"))
 133                 ctx.repo = cgit_add_repo(value);
 134         else if (ctx.repo && !strcmp(name, "repo.path"))
 135                 ctx.repo->path = trim_end(value, '/');
 136         else if (ctx.repo && skip_prefix(name, "repo.", &arg))
 137                 repo_config(ctx.repo, arg, value);
 138         else if (!strcmp(name, "readme"))
 139                 string_list_append(&ctx.cfg.readme, xstrdup(value));
 140         else if (!strcmp(name, "root-title"))
 141                 ctx.cfg.root_title = xstrdup(value);
 142         else if (!strcmp(name, "root-desc"))
 143                 ctx.cfg.root_desc = xstrdup(value);
 144         else if (!strcmp(name, "root-readme"))
 145                 ctx.cfg.root_readme = xstrdup(value);
 146         else if (!strcmp(name, "css"))
 147                 string_list_append(&ctx.cfg.css, xstrdup(value));
 148         else if (!strcmp(name, "js"))
 149                 string_list_append(&ctx.cfg.js, xstrdup(value));
 150         else if (!strcmp(name, "favicon"))
 151                 ctx.cfg.favicon = xstrdup(value);
 152         else if (!strcmp(name, "footer"))
 153                 ctx.cfg.footer = xstrdup(value);
 154         else if (!strcmp(name, "head-include"))
 155                 ctx.cfg.head_include = xstrdup(value);
 156         else if (!strcmp(name, "header"))
 157                 ctx.cfg.header = xstrdup(value);
 158         else if (!strcmp(name, "logo"))
 159                 ctx.cfg.logo = xstrdup(value);
 160         else if (!strcmp(name, "logo-link"))
 161                 ctx.cfg.logo_link = xstrdup(value);
 162         else if (!strcmp(name, "module-link"))
 163                 ctx.cfg.module_link = xstrdup(value);
 164         else if (!strcmp(name, "strict-export"))
 165                 ctx.cfg.strict_export = xstrdup(value);
 166         else if (!strcmp(name, "virtual-root"))
 167                 ctx.cfg.virtual_root = ensure_end(value, '/');
 168         else if (!strcmp(name, "noplainemail"))
 169                 ctx.cfg.noplainemail = atoi(value);
 170         else if (!strcmp(name, "noheader"))
 171                 ctx.cfg.noheader = atoi(value);
 172         else if (!strcmp(name, "snapshots"))
 173                 ctx.cfg.snapshots = cgit_parse_snapshots_mask(value);
 174         else if (!strcmp(name, "enable-filter-overrides"))
 175                 ctx.cfg.enable_filter_overrides = atoi(value);
 176         else if (!strcmp(name, "enable-follow-links"))
 177                 ctx.cfg.enable_follow_links = atoi(value);
 178         else if (!strcmp(name, "enable-http-clone"))
 179                 ctx.cfg.enable_http_clone = atoi(value);
 180         else if (!strcmp(name, "enable-index-links"))
 181                 ctx.cfg.enable_index_links = atoi(value);
 182         else if (!strcmp(name, "enable-index-owner"))
 183                 ctx.cfg.enable_index_owner = atoi(value);
 184         else if (!strcmp(name, "enable-blame"))
 185                 ctx.cfg.enable_blame = atoi(value);
 186         else if (!strcmp(name, "enable-commit-graph"))
 187                 ctx.cfg.enable_commit_graph = atoi(value);
 188         else if (!strcmp(name, "enable-log-filecount"))
 189                 ctx.cfg.enable_log_filecount = atoi(value);
 190         else if (!strcmp(name, "enable-log-linecount"))
 191                 ctx.cfg.enable_log_linecount = atoi(value);
 192         else if (!strcmp(name, "enable-remote-branches"))
 193                 ctx.cfg.enable_remote_branches = atoi(value);
 194         else if (!strcmp(name, "enable-subject-links"))
 195                 ctx.cfg.enable_subject_links = atoi(value);
 196         else if (!strcmp(name, "enable-html-serving"))
 197                 ctx.cfg.enable_html_serving = atoi(value);
 198         else if (!strcmp(name, "enable-tree-linenumbers"))
 199                 ctx.cfg.enable_tree_linenumbers = atoi(value);
 200         else if (!strcmp(name, "enable-git-config"))
 201                 ctx.cfg.enable_git_config = atoi(value);
 202         else if (!strcmp(name, "max-stats"))
 203                 ctx.cfg.max_stats = cgit_find_stats_period(value, NULL);
 204         else if (!strcmp(name, "cache-size"))
 205                 ctx.cfg.cache_size = atoi(value);
 206         else if (!strcmp(name, "cache-root"))
 207                 ctx.cfg.cache_root = xstrdup(expand_macros(value));
 208         else if (!strcmp(name, "cache-root-ttl"))
 209                 ctx.cfg.cache_root_ttl = atoi(value);
 210         else if (!strcmp(name, "cache-repo-ttl"))
 211                 ctx.cfg.cache_repo_ttl = atoi(value);
 212         else if (!strcmp(name, "cache-scanrc-ttl"))
 213                 ctx.cfg.cache_scanrc_ttl = atoi(value);
 214         else if (!strcmp(name, "cache-static-ttl"))
 215                 ctx.cfg.cache_static_ttl = atoi(value);
 216         else if (!strcmp(name, "cache-dynamic-ttl"))
 217                 ctx.cfg.cache_dynamic_ttl = atoi(value);
 218         else if (!strcmp(name, "cache-about-ttl"))
 219                 ctx.cfg.cache_about_ttl = atoi(value);
 220         else if (!strcmp(name, "cache-snapshot-ttl"))
 221                 ctx.cfg.cache_snapshot_ttl = atoi(value);
 222         else if (!strcmp(name, "case-sensitive-sort"))
 223                 ctx.cfg.case_sensitive_sort = atoi(value);
 224         else if (!strcmp(name, "about-filter"))
 225                 ctx.cfg.about_filter = cgit_new_filter(value, ABOUT);
 226         else if (!strcmp(name, "commit-filter"))
 227                 ctx.cfg.commit_filter = cgit_new_filter(value, COMMIT);
 228         else if (!strcmp(name, "email-filter"))
 229                 ctx.cfg.email_filter = cgit_new_filter(value, EMAIL);
 230         else if (!strcmp(name, "owner-filter"))
 231                 ctx.cfg.owner_filter = cgit_new_filter(value, OWNER);
 232         else if (!strcmp(name, "auth-filter"))
 233                 ctx.cfg.auth_filter = cgit_new_filter(value, AUTH);
 234         else if (!strcmp(name, "embedded"))
 235                 ctx.cfg.embedded = atoi(value);
 236         else if (!strcmp(name, "max-atom-items"))
 237                 ctx.cfg.max_atom_items = atoi(value);
 238         else if (!strcmp(name, "max-message-length"))
 239                 ctx.cfg.max_msg_len = atoi(value);
 240         else if (!strcmp(name, "max-repodesc-length"))
 241                 ctx.cfg.max_repodesc_len = atoi(value);
 242         else if (!strcmp(name, "max-blob-size"))
 243                 ctx.cfg.max_blob_size = atoi(value);
 244         else if (!strcmp(name, "max-repo-count")) {
 245                 ctx.cfg.max_repo_count = atoi(value);
 246                 if (ctx.cfg.max_repo_count <= 0)
 247                         ctx.cfg.max_repo_count = INT_MAX;
 248         } else if (!strcmp(name, "max-commit-count"))
 249                 ctx.cfg.max_commit_count = atoi(value);
 250         else if (!strcmp(name, "project-list"))
 251                 ctx.cfg.project_list = xstrdup(expand_macros(value));
 252         else if (!strcmp(name, "scan-path"))
 253                 if (ctx.cfg.cache_size)
 254                         process_cached_repolist(expand_macros(value));
 255                 else if (ctx.cfg.project_list)
 256                         scan_projects(expand_macros(value),
 257                                       ctx.cfg.project_list, repo_config);
 258                 else
 259                         scan_tree(expand_macros(value), repo_config);
 260         else if (!strcmp(name, "scan-hidden-path"))
 261                 ctx.cfg.scan_hidden_path = atoi(value);
 262         else if (!strcmp(name, "section-from-path"))
 263                 ctx.cfg.section_from_path = atoi(value);
 264         else if (!strcmp(name, "repository-sort"))
 265                 ctx.cfg.repository_sort = xstrdup(value);
 266         else if (!strcmp(name, "section-sort"))
 267                 ctx.cfg.section_sort = atoi(value);
 268         else if (!strcmp(name, "source-filter"))
 269                 ctx.cfg.source_filter = cgit_new_filter(value, SOURCE);
 270         else if (!strcmp(name, "summary-log"))
 271                 ctx.cfg.summary_log = atoi(value);
 272         else if (!strcmp(name, "summary-branches"))
 273                 ctx.cfg.summary_branches = atoi(value);
 274         else if (!strcmp(name, "summary-tags"))
 275                 ctx.cfg.summary_tags = atoi(value);
 276         else if (!strcmp(name, "side-by-side-diffs"))
 277                 ctx.cfg.difftype = atoi(value) ? DIFF_SSDIFF : DIFF_UNIFIED;
 278         else if (!strcmp(name, "agefile"))
 279                 ctx.cfg.agefile = xstrdup(value);
 280         else if (!strcmp(name, "mimetype-file"))
 281                 ctx.cfg.mimetype_file = xstrdup(value);
 282         else if (!strcmp(name, "renamelimit"))
 283                 ctx.cfg.renamelimit = atoi(value);
 284         else if (!strcmp(name, "remove-suffix"))
 285                 ctx.cfg.remove_suffix = atoi(value);
 286         else if (!strcmp(name, "robots"))
 287                 ctx.cfg.robots = xstrdup(value);
 288         else if (!strcmp(name, "clone-prefix"))
 289                 ctx.cfg.clone_prefix = xstrdup(value);
 290         else if (!strcmp(name, "clone-url"))
 291                 ctx.cfg.clone_url = xstrdup(value);
 292         else if (!strcmp(name, "local-time"))
 293                 ctx.cfg.local_time = atoi(value);
 294         else if (!strcmp(name, "commit-sort")) {
 295                 if (!strcmp(value, "date"))
 296                         ctx.cfg.commit_sort = 1;
 297                 if (!strcmp(value, "topo"))
 298                         ctx.cfg.commit_sort = 2;
 299         } else if (!strcmp(name, "branch-sort")) {
 300                 if (!strcmp(value, "age"))
 301                         ctx.cfg.branch_sort = 1;
 302                 if (!strcmp(value, "name"))
 303                         ctx.cfg.branch_sort = 0;
 304         } else if (skip_prefix(name, "mimetype.", &arg))
 305                 add_mimetype(arg, value);
 306         else if (!strcmp(name, "include"))
 307                 parse_configfile(expand_macros(value), config_cb);
 308 }
 309
 310 static void querystring_cb(const char *name, const char *value)
 311 {
 312         if (!value)
 313                 value = "";
 314
 315         if (!strcmp(name,"r")) {
 316                 ctx.qry.repo = xstrdup(value);
 317                 ctx.repo = cgit_get_repoinfo(value);
 318         } else if (!strcmp(name, "p")) {
 319                 ctx.qry.page = xstrdup(value);
 320         } else if (!strcmp(name, "url")) {
 321                 if (*value == '/')
 322                         value++;
 323                 ctx.qry.url = xstrdup(value);
 324                 cgit_parse_url(value);
 325         } else if (!strcmp(name, "qt")) {
 326                 ctx.qry.grep = xstrdup(value);
 327         } else if (!strcmp(name, "q")) {
 328                 ctx.qry.search = xstrdup(value);
 329         } else if (!strcmp(name, "h")) {
 330                 ctx.qry.head = xstrdup(value);
 331                 ctx.qry.has_symref = 1;
 332         } else if (!strcmp(name, "id")) {
 333                 ctx.qry.oid = xstrdup(value);
 334                 ctx.qry.has_oid = 1;
 335         } else if (!strcmp(name, "id2")) {
 336                 ctx.qry.oid2 = xstrdup(value);
 337                 ctx.qry.has_oid = 1;
 338         } else if (!strcmp(name, "ofs")) {
 339                 ctx.qry.ofs = atoi(value);
 340         } else if (!strcmp(name, "path")) {
 341                 ctx.qry.path = trim_end(value, '/');
 342         } else if (!strcmp(name, "name")) {
 343                 ctx.qry.name = xstrdup(value);
 344         } else if (!strcmp(name, "s")) {
 345                 ctx.qry.sort = xstrdup(value);
 346         } else if (!strcmp(name, "showmsg")) {
 347                 ctx.qry.showmsg = atoi(value);
 348         } else if (!strcmp(name, "period")) {
 349                 ctx.qry.period = xstrdup(value);
 350         } else if (!strcmp(name, "dt")) {
 351                 ctx.qry.difftype = atoi(value);
 352                 ctx.qry.has_difftype = 1;
 353         } else if (!strcmp(name, "ss")) {
 354                 /* No longer generated, but there may be links out there. */
 355                 ctx.qry.difftype = atoi(value) ? DIFF_SSDIFF : DIFF_UNIFIED;
 356                 ctx.qry.has_difftype = 1;
 357         } else if (!strcmp(name, "all")) {
 358                 ctx.qry.show_all = atoi(value);
 359         } else if (!strcmp(name, "context")) {
 360                 ctx.qry.context = atoi(value);
 361         } else if (!strcmp(name, "ignorews")) {
 362                 ctx.qry.ignorews = atoi(value);
 363         } else if (!strcmp(name, "follow")) {
 364                 ctx.qry.follow = atoi(value);
 365         }
 366 }
 367
 368 static void prepare_context(void)
 369 {
 370         memset(&ctx, 0, sizeof(ctx));
 371         ctx.cfg.agefile = "info/web/last-modified";
 372         ctx.cfg.cache_size = 0;
 373         ctx.cfg.cache_max_create_time = 5;
 374         ctx.cfg.cache_root = CGIT_CACHE_ROOT;
 375         ctx.cfg.cache_about_ttl = 15;
 376         ctx.cfg.cache_snapshot_ttl = 5;
 377         ctx.cfg.cache_repo_ttl = 5;
 378         ctx.cfg.cache_root_ttl = 5;
 379         ctx.cfg.cache_scanrc_ttl = 15;
 380         ctx.cfg.cache_dynamic_ttl = 5;
 381         ctx.cfg.cache_static_ttl = -1;
 382         ctx.cfg.case_sensitive_sort = 1;
 383         ctx.cfg.branch_sort = 0;
 384         ctx.cfg.commit_sort = 0;
 385         ctx.cfg.logo = "/cgit.png";
 386         ctx.cfg.favicon = "/favicon.ico";
 387         ctx.cfg.local_time = 0;
 388         ctx.cfg.enable_http_clone = 1;
 389         ctx.cfg.enable_index_owner = 1;
 390         ctx.cfg.enable_tree_linenumbers = 1;
 391         ctx.cfg.enable_git_config = 0;
 392         ctx.cfg.max_repo_count = 50;
 393         ctx.cfg.max_commit_count = 50;
 394         ctx.cfg.max_lock_attempts = 5;
 395         ctx.cfg.max_msg_len = 80;
 396         ctx.cfg.max_repodesc_len = 80;
 397         ctx.cfg.max_blob_size = 0;
 398         ctx.cfg.max_stats = 0;
 399         ctx.cfg.project_list = NULL;
 400         ctx.cfg.renamelimit = -1;
 401         ctx.cfg.remove_suffix = 0;
 402         ctx.cfg.robots = "index, nofollow";
 403         ctx.cfg.root_title = "Git repository browser";
 404         ctx.cfg.root_desc = "a fast webinterface for the git dscm";
 405         ctx.cfg.scan_hidden_path = 0;
 406         ctx.cfg.script_name = CGIT_SCRIPT_NAME;
 407         ctx.cfg.section = "";
 408         ctx.cfg.repository_sort = "name";
 409         ctx.cfg.section_sort = 1;
 410         ctx.cfg.summary_branches = 10;
 411         ctx.cfg.summary_log = 10;
 412         ctx.cfg.summary_tags = 10;
 413         ctx.cfg.max_atom_items = 10;
 414         ctx.cfg.difftype = DIFF_UNIFIED;
 415         ctx.env.cgit_config = getenv("CGIT_CONFIG");
 416         ctx.env.http_host = getenv("HTTP_HOST");
 417         ctx.env.https = getenv("HTTPS");
 418         ctx.env.no_http = getenv("NO_HTTP");
 419         ctx.env.path_info = getenv("PATH_INFO");
 420         ctx.env.query_string = getenv("QUERY_STRING");
 421         ctx.env.request_method = getenv("REQUEST_METHOD");
 422         ctx.env.script_name = getenv("SCRIPT_NAME");
 423         ctx.env.server_name = getenv("SERVER_NAME");
 424         ctx.env.server_port = getenv("SERVER_PORT");
 425         ctx.env.http_cookie = getenv("HTTP_COOKIE");
 426         ctx.env.http_referer = getenv("HTTP_REFERER");
 427         ctx.env.content_length = getenv("CONTENT_LENGTH") ? strtoul(getenv("CONTENT_LENGTH"), NULL, 10) : 0;
 428         ctx.env.authenticated = 0;
 429         ctx.page.mimetype = "text/html";
 430         ctx.page.charset = PAGE_ENCODING;
 431         ctx.page.filename = NULL;
 432         ctx.page.size = 0;
 433         ctx.page.modified = time(NULL);
 434         ctx.page.expires = ctx.page.modified;
 435         ctx.page.etag = NULL;
 436         string_list_init_dup(&ctx.cfg.mimetypes);
 437         if (ctx.env.script_name)
 438                 ctx.cfg.script_name = xstrdup(ctx.env.script_name);
 439         if (ctx.env.query_string)
 440                 ctx.qry.raw = xstrdup(ctx.env.query_string);
 441         if (!ctx.env.cgit_config)
 442                 ctx.env.cgit_config = CGIT_CONFIG;
 443 }
 444
 445 struct refmatch {
 446         char *req_ref;
 447         char *first_ref;
 448         int match;
 449 };
 450
 451 static int find_current_ref(const char *refname, const struct object_id *oid,
 452                             int flags, void *cb_data)
 453 {
 454         struct refmatch *info;
 455
 456         info = (struct refmatch *)cb_data;
 457         if (!strcmp(refname, info->req_ref))
 458                 info->match = 1;
 459         if (!info->first_ref)
 460                 info->first_ref = xstrdup(refname);
 461         return info->match;
 462 }
 463
 464 static void free_refmatch_inner(struct refmatch *info)
 465 {
 466         if (info->first_ref)
 467                 free(info->first_ref);
 468 }
 469
 470 static char *find_default_branch(struct cgit_repo *repo)
 471 {
 472         struct refmatch info;
 473         char *ref;
 474
 475         info.req_ref = repo->defbranch;
 476         info.first_ref = NULL;
 477         info.match = 0;
 478         refs_for_each_branch_ref(get_main_ref_store(the_repository),
 479                                  find_current_ref, &info);
 480         if (info.match)
 481                 ref = info.req_ref;
 482         else
 483                 ref = info.first_ref;
 484         if (ref)
 485                 ref = xstrdup(ref);
 486         free_refmatch_inner(&info);
 487
 488         return ref;
 489 }
 490
 491 static char *guess_defbranch(void)
 492 {
 493         const char *ref, *refname;
 494         struct object_id oid;
 495
 496         ref = refs_resolve_ref_unsafe(get_main_ref_store(the_repository),
 497                                      "HEAD", 0, &oid, NULL);
 498         if (!ref || !skip_prefix(ref, "refs/heads/", &refname))
 499                 return "master";
 500         return xstrdup(refname);
 501 }
 502
 503 /* The caller must free filename and ref after calling this. */
 504 static inline void parse_readme(const char *readme, char **filename, char **ref, struct cgit_repo *repo)
 505 {
 506         const char *colon;
 507
 508         *filename = NULL;
 509         *ref = NULL;
 510
 511         if (!readme || !readme[0])
 512                 return;
 513
 514         /* Check if the readme is tracked in the git repo. */
 515         colon = strchr(readme, ':');
 516         if (colon && strlen(colon) > 1) {
 517                 /* If it starts with a colon, we want to use head given
 518                  * from query or the default branch */
 519                 if (colon == readme && ctx.qry.head)
 520                         *ref = xstrdup(ctx.qry.head);
 521                 else if (colon == readme && repo->defbranch)
 522                         *ref = xstrdup(repo->defbranch);
 523                 else
 524                         *ref = xstrndup(readme, colon - readme);
 525                 readme = colon + 1;
 526         }
 527
 528         /* Prepend repo path to relative readme path unless tracked. */
 529         if (!(*ref) && readme[0] != '/')
 530                 *filename = fmtalloc("%s/%s", repo->path, readme);
 531         else
 532                 *filename = xstrdup(readme);
 533 }
 534 static void choose_readme(struct cgit_repo *repo)
 535 {
 536         int found;
 537         char *filename, *ref;
 538         struct string_list_item *entry;
 539
 540         if (!repo->readme.nr)
 541                 return;
 542
 543         found = 0;
 544         for_each_string_list_item(entry, &repo->readme) {
 545                 parse_readme(entry->string, &filename, &ref, repo);
 546                 if (!filename) {
 547                         free(filename);
 548                         free(ref);
 549                         continue;
 550                 }
 551                 if (ref) {
 552                         if (cgit_ref_path_exists(filename, ref, 1)) {
 553                                 found = 1;
 554                                 break;
 555                         }
 556                 }
 557                 else if (!access(filename, R_OK)) {
 558                         found = 1;
 559                         break;
 560                 }
 561                 free(filename);
 562                 free(ref);
 563         }
 564         repo->readme.strdup_strings = 1;
 565         string_list_clear(&repo->readme, 0);
 566         repo->readme.strdup_strings = 0;
 567         if (found)
 568                 string_list_append(&repo->readme, filename)->util = ref;
 569 }
 570
 571 static void print_no_repo_clone_urls(const char *url)
 572 {
 573         html("<tr><td><a rel='vcs-git' href='");
 574         html_url_path(url);
 575         html("' title='");
 576         html_attr(ctx.repo->name);
 577         html(" Git repository'>");
 578         html_txt(url);
 579         html("</a></td></tr>\n");
 580 }
 581
 582 static void prepare_repo_env(int *nongit)
 583 {
 584         /* The path to the git repository. */
 585         setenv("GIT_DIR", ctx.repo->path, 1);
 586
 587         /* Setup the git directory and initialize the notes system. Both of these
 588          * load local configuration from the git repository, so we do them both while
 589          * the HOME variables are unset. */
 590         setup_git_directory_gently(nongit);
 591         load_display_notes(NULL);
 592 }
 593
 594 static int prepare_repo_cmd(int nongit)
 595 {
 596         struct object_id oid;
 597         int rc;
 598
 599         if (nongit) {
 600                 const char *name = ctx.repo->name;
 601                 rc = errno;
 602                 ctx.page.title = fmtalloc("%s - %s", ctx.cfg.root_title,
 603                                                 "config error");
 604                 ctx.repo = NULL;
 605                 cgit_print_http_headers();
 606                 cgit_print_docstart();
 607                 cgit_print_pageheader();
 608                 cgit_print_error("Failed to open %s: %s", name,
 609                                  rc ? strerror(rc) : "Not a valid git repository");
 610                 cgit_print_docend();
 611                 return 1;
 612         }
 613         ctx.page.title = fmtalloc("%s - %s", ctx.repo->name, ctx.repo->desc);
 614
 615         if (!ctx.repo->defbranch)
 616                 ctx.repo->defbranch = guess_defbranch();
 617
 618         if (!ctx.qry.head) {
 619                 ctx.qry.nohead = 1;
 620                 ctx.qry.head = find_default_branch(ctx.repo);
 621         }
 622
 623         if (!ctx.qry.head) {
 624                 cgit_print_http_headers();
 625                 cgit_print_docstart();
 626                 cgit_print_pageheader();
 627                 cgit_print_error("Repository seems to be empty");
 628                 if (!strcmp(ctx.qry.page, "summary")) {
 629                         html("<table class='list'><tr class='nohover'><td>&nbsp;</td></tr><tr class='nohover'><th class='left'>Clone</th></tr>\n");
 630                         cgit_prepare_repo_env(ctx.repo);
 631                         cgit_add_clone_urls(print_no_repo_clone_urls);
 632                         html("</table>\n");
 633                 }
 634                 cgit_print_docend();
 635                 return 1;
 636         }
 637
 638         if (repo_get_oid(the_repository, ctx.qry.head, &oid)) {
 639                 char *old_head = ctx.qry.head;
 640                 ctx.qry.head = xstrdup(ctx.repo->defbranch);
 641                 cgit_print_error_page(404, "Not found",
 642                                 "Invalid branch: %s", old_head);
 643                 free(old_head);
 644                 return 1;
 645         }
 646         string_list_sort(&ctx.repo->submodules);
 647         cgit_prepare_repo_env(ctx.repo);
 648         choose_readme(ctx.repo);
 649         return 0;
 650 }
 651
 652 static inline void open_auth_filter(const char *function)
 653 {
 654         cgit_open_filter(ctx.cfg.auth_filter, function,
 655                 ctx.env.http_cookie ? ctx.env.http_cookie : "",
 656                 ctx.env.request_method ? ctx.env.request_method : "",
 657                 ctx.env.query_string ? ctx.env.query_string : "",
 658                 ctx.env.http_referer ? ctx.env.http_referer : "",
 659                 ctx.env.path_info ? ctx.env.path_info : "",
 660                 ctx.env.http_host ? ctx.env.http_host : "",
 661                 ctx.env.https ? ctx.env.https : "",
 662                 ctx.qry.repo ? ctx.qry.repo : "",
 663                 ctx.qry.page ? ctx.qry.page : "",
 664                 cgit_currentfullurl(),
 665                 cgit_loginurl());
 666 }
 667
 668 /* We intentionally keep this rather small, instead of looping and
 669  * feeding it to the filter a couple bytes at a time. This way, the
 670  * filter itself does not need to handle any denial of service or
 671  * buffer bloat issues. If this winds up being too small, people
 672  * will complain on the mailing list, and we'll increase it as needed. */
 673 #define MAX_AUTHENTICATION_POST_BYTES 4096
 674 /* The filter is expected to spit out "Status: " and all headers. */
 675 static inline void authenticate_post(void)
 676 {
 677         char buffer[MAX_AUTHENTICATION_POST_BYTES];
 678         ssize_t len;
 679
 680         open_auth_filter("authenticate-post");
 681         len = ctx.env.content_length;
 682         if (len > MAX_AUTHENTICATION_POST_BYTES)
 683                 len = MAX_AUTHENTICATION_POST_BYTES;
 684         if ((len = read(STDIN_FILENO, buffer, len)) < 0)
 685                 die_errno("Could not read POST from stdin");
 686         if (write(STDOUT_FILENO, buffer, len) < 0)
 687                 die_errno("Could not write POST to stdout");
 688         cgit_close_filter(ctx.cfg.auth_filter);
 689         exit(0);
 690 }
 691
 692 static inline void authenticate_cookie(void)
 693 {
 694         /* If we don't have an auth_filter, consider all cookies valid, and thus return early. */
 695         if (!ctx.cfg.auth_filter) {
 696                 ctx.env.authenticated = 1;
 697                 return;
 698         }
 699
 700         /* If we're having something POST'd to /login, we're authenticating POST,
 701          * instead of the cookie, so call authenticate_post and bail out early.
 702          * This pattern here should match /?p=login with POST. */
 703         if (ctx.env.request_method && ctx.qry.page && !ctx.repo && \
 704             !strcmp(ctx.env.request_method, "POST") && !strcmp(ctx.qry.page, "login")) {
 705                 authenticate_post();
 706                 return;
 707         }
 708
 709         /* If we've made it this far, we're authenticating the cookie for real, so do that. */
 710         open_auth_filter("authenticate-cookie");
 711         ctx.env.authenticated = cgit_close_filter(ctx.cfg.auth_filter);
 712 }
 713
 714 static void process_request(void)
 715 {
 716         struct cgit_cmd *cmd;
 717         int nongit = 0;
 718
 719         /* If we're not yet authenticated, no matter what page we're on,
 720          * display the authentication body from the auth_filter. This should
 721          * never be cached. */
 722         if (!ctx.env.authenticated) {
 723                 ctx.page.title = "Authentication Required";
 724                 cgit_print_http_headers();
 725                 cgit_print_docstart();
 726                 cgit_print_pageheader();
 727                 open_auth_filter("body");
 728                 cgit_close_filter(ctx.cfg.auth_filter);
 729                 cgit_print_docend();
 730                 return;
 731         }
 732
 733         if (ctx.repo)
 734                 prepare_repo_env(&nongit);
 735
 736         cmd = cgit_get_cmd();
 737         if (!cmd) {
 738                 ctx.page.title = "cgit error";
 739                 cgit_print_error_page(404, "Not found", "Invalid request");
 740                 return;
 741         }
 742
 743         if (!ctx.cfg.enable_http_clone && cmd->is_clone) {
 744                 ctx.page.title = "cgit error";
 745                 cgit_print_error_page(404, "Not found", "Invalid request");
 746                 return;
 747         }
 748
 749         if (cmd->want_repo && !ctx.repo) {
 750                 cgit_print_error_page(400, "Bad request",
 751                                 "No repository selected");
 752                 return;
 753         }
 754
 755         /* If cmd->want_vpath is set, assume ctx.qry.path contains a "virtual"
 756          * in-project path limit to be made available at ctx.qry.vpath.
 757          * Otherwise, no path limit is in effect (ctx.qry.vpath = NULL).
 758          */
 759         ctx.qry.vpath = cmd->want_vpath ? ctx.qry.path : NULL;
 760
 761         if (ctx.repo && prepare_repo_cmd(nongit))
 762                 return;
 763
 764         cmd->fn();
 765 }
 766
 767 static int cmp_repos(const void *a, const void *b)
 768 {
 769         const struct cgit_repo *ra = a, *rb = b;
 770         return strcmp(ra->url, rb->url);
 771 }
 772
 773 static char *build_snapshot_setting(int bitmap)
 774 {
 775         const struct cgit_snapshot_format *f;
 776         struct strbuf result = STRBUF_INIT;
 777
 778         for (f = cgit_snapshot_formats; f->suffix; f++) {
 779                 if (cgit_snapshot_format_bit(f) & bitmap) {
 780                         if (result.len)
 781                                 strbuf_addch(&result, ' ');
 782                         strbuf_addstr(&result, f->suffix);
 783                 }
 784         }
 785         return strbuf_detach(&result, NULL);
 786 }
 787
 788 static char *get_first_line(char *txt)
 789 {
 790         char *t = xstrdup(txt);
 791         char *p = strchr(t, '\n');
 792         if (p)
 793                 *p = '\0';
 794         return t;
 795 }
 796
 797 static void print_repo(FILE *f, struct cgit_repo *repo)
 798 {
 799         struct string_list_item *item;
 800         fprintf(f, "repo.url=%s\n", repo->url);
 801         fprintf(f, "repo.name=%s\n", repo->name);
 802         fprintf(f, "repo.path=%s\n", repo->path);
 803         if (repo->owner)
 804                 fprintf(f, "repo.owner=%s\n", repo->owner);
 805         if (repo->desc) {
 806                 char *tmp = get_first_line(repo->desc);
 807                 fprintf(f, "repo.desc=%s\n", tmp);
 808                 free(tmp);
 809         }
 810         for_each_string_list_item(item, &repo->readme) {
 811                 if (item->util)
 812                         fprintf(f, "repo.readme=%s:%s\n", (char *)item->util, item->string);
 813                 else
 814                         fprintf(f, "repo.readme=%s\n", item->string);
 815         }
 816         if (repo->defbranch)
 817                 fprintf(f, "repo.defbranch=%s\n", repo->defbranch);
 818         if (repo->extra_head_content)
 819                 fprintf(f, "repo.extra-head-content=%s\n", repo->extra_head_content);
 820         if (repo->module_link)
 821                 fprintf(f, "repo.module-link=%s\n", repo->module_link);
 822         if (repo->section)
 823                 fprintf(f, "repo.section=%s\n", repo->section);
 824         if (repo->homepage)
 825                 fprintf(f, "repo.homepage=%s\n", repo->homepage);
 826         if (repo->clone_url)
 827                 fprintf(f, "repo.clone-url=%s\n", repo->clone_url);
 828         fprintf(f, "repo.enable-blame=%d\n",
 829                 repo->enable_blame);
 830         fprintf(f, "repo.enable-commit-graph=%d\n",
 831                 repo->enable_commit_graph);
 832         fprintf(f, "repo.enable-log-filecount=%d\n",
 833                 repo->enable_log_filecount);
 834         fprintf(f, "repo.enable-log-linecount=%d\n",
 835                 repo->enable_log_linecount);
 836         if (repo->about_filter && repo->about_filter != ctx.cfg.about_filter)
 837                 cgit_fprintf_filter(repo->about_filter, f, "repo.about-filter=");
 838         if (repo->commit_filter && repo->commit_filter != ctx.cfg.commit_filter)
 839                 cgit_fprintf_filter(repo->commit_filter, f, "repo.commit-filter=");
 840         if (repo->source_filter && repo->source_filter != ctx.cfg.source_filter)
 841                 cgit_fprintf_filter(repo->source_filter, f, "repo.source-filter=");
 842         if (repo->email_filter && repo->email_filter != ctx.cfg.email_filter)
 843                 cgit_fprintf_filter(repo->email_filter, f, "repo.email-filter=");
 844         if (repo->owner_filter && repo->owner_filter != ctx.cfg.owner_filter)
 845                 cgit_fprintf_filter(repo->owner_filter, f, "repo.owner-filter=");
 846         if (repo->snapshots != ctx.cfg.snapshots) {
 847                 char *tmp = build_snapshot_setting(repo->snapshots);
 848                 fprintf(f, "repo.snapshots=%s\n", tmp ? tmp : "");
 849                 free(tmp);
 850         }
 851         if (repo->snapshot_prefix)
 852                 fprintf(f, "repo.snapshot-prefix=%s\n", repo->snapshot_prefix);
 853         if (repo->max_stats != ctx.cfg.max_stats)
 854                 fprintf(f, "repo.max-stats=%s\n",
 855                         cgit_find_stats_periodname(repo->max_stats));
 856         if (repo->logo)
 857                 fprintf(f, "repo.logo=%s\n", repo->logo);
 858         if (repo->logo_link)
 859                 fprintf(f, "repo.logo-link=%s\n", repo->logo_link);
 860         fprintf(f, "repo.enable-remote-branches=%d\n", repo->enable_remote_branches);
 861         fprintf(f, "repo.enable-subject-links=%d\n", repo->enable_subject_links);
 862         fprintf(f, "repo.enable-html-serving=%d\n", repo->enable_html_serving);
 863         if (repo->branch_sort == 1)
 864                 fprintf(f, "repo.branch-sort=age\n");
 865         if (repo->commit_sort) {
 866                 if (repo->commit_sort == 1)
 867                         fprintf(f, "repo.commit-sort=date\n");
 868                 else if (repo->commit_sort == 2)
 869                         fprintf(f, "repo.commit-sort=topo\n");
 870         }
 871         fprintf(f, "repo.hide=%d\n", repo->hide);
 872         fprintf(f, "repo.ignore=%d\n", repo->ignore);
 873         fprintf(f, "\n");
 874 }
 875
 876 static void print_repolist(FILE *f, struct cgit_repolist *list, int start)
 877 {
 878         int i;
 879
 880         for (i = start; i < list->count; i++)
 881                 print_repo(f, &list->repos[i]);
 882 }
 883
 884 /* Scan 'path' for git repositories, save the resulting repolist in 'cached_rc'
 885  * and return 0 on success.
 886  */
 887 static int generate_cached_repolist(const char *path, const char *cached_rc)
 888 {
 889         struct strbuf locked_rc = STRBUF_INIT;
 890         int result = 0;
 891         int idx;
 892         FILE *f;
 893
 894         strbuf_addf(&locked_rc, "%s.lock", cached_rc);
 895         f = fopen(locked_rc.buf, "wx");
 896         if (!f) {
 897                 /* Inform about the error unless the lockfile already existed,
 898                  * since that only means we've got concurrent requests.
 899                  */
 900                 result = errno;
 901                 if (result != EEXIST)
 902                         fprintf(stderr, "[cgit] Error opening %s: %s (%d)\n",
 903                                 locked_rc.buf, strerror(result), result);
 904                 goto out;
 905         }
 906         idx = cgit_repolist.count;
 907         if (ctx.cfg.project_list)
 908                 scan_projects(path, ctx.cfg.project_list, repo_config);
 909         else
 910                 scan_tree(path, repo_config);
 911         print_repolist(f, &cgit_repolist, idx);
 912         if (rename(locked_rc.buf, cached_rc))
 913                 fprintf(stderr, "[cgit] Error renaming %s to %s: %s (%d)\n",
 914                         locked_rc.buf, cached_rc, strerror(errno), errno);
 915         fclose(f);
 916 out:
 917         strbuf_release(&locked_rc);
 918         return result;
 919 }
 920
 921 static void process_cached_repolist(const char *path)
 922 {
 923         struct stat st;
 924         struct strbuf cached_rc = STRBUF_INIT;
 925         time_t age;
 926         unsigned long hash;
 927
 928         hash = hash_str(path);
 929         if (ctx.cfg.project_list)
 930                 hash += hash_str(ctx.cfg.project_list);
 931         strbuf_addf(&cached_rc, "%s/rc-%8lx", ctx.cfg.cache_root, hash);
 932
 933         if (stat(cached_rc.buf, &st)) {
 934                 /* Nothing is cached, we need to scan without forking. And
 935                  * if we fail to generate a cached repolist, we need to
 936                  * invoke scan_tree manually.
 937                  */
 938                 if (generate_cached_repolist(path, cached_rc.buf)) {
 939                         if (ctx.cfg.project_list)
 940                                 scan_projects(path, ctx.cfg.project_list,
 941                                               repo_config);
 942                         else
 943                                 scan_tree(path, repo_config);
 944                 }
 945                 goto out;
 946         }
 947
 948         parse_configfile(cached_rc.buf, config_cb);
 949
 950         /* If the cached configfile hasn't expired, lets exit now */
 951         age = time(NULL) - st.st_mtime;
 952         if (age <= (ctx.cfg.cache_scanrc_ttl * 60))
 953                 goto out;
 954
 955         /* The cached repolist has been parsed, but it was old. So lets
 956          * rescan the specified path and generate a new cached repolist
 957          * in a child-process to avoid latency for the current request.
 958          */
 959         if (fork())
 960                 goto out;
 961
 962         exit(generate_cached_repolist(path, cached_rc.buf));
 963 out:
 964         strbuf_release(&cached_rc);
 965 }
 966
 967 static void cgit_parse_args(int argc, const char **argv)
 968 {
 969         int i;
 970         const char *arg;
 971         int scan = 0;
 972
 973         for (i = 1; i < argc; i++) {
 974                 if (!strcmp(argv[i], "--version")) {
 975                         printf("CGit %s | https://git.zx2c4.com/cgit/\n\nCompiled in features:\n", CGIT_VERSION);
 976 #ifdef NO_LUA
 977                         printf("[-] ");
 978 #else
 979                         printf("[+] ");
 980 #endif
 981                         printf("Lua scripting\n");
 982 #ifndef HAVE_LINUX_SENDFILE
 983                         printf("[-] ");
 984 #else
 985                         printf("[+] ");
 986 #endif
 987                         printf("Linux sendfile() usage\n");
 988
 989                         exit(0);
 990                 }
 991                 if (skip_prefix(argv[i], "--cache=", &arg)) {
 992                         ctx.cfg.cache_root = xstrdup(arg);
 993                 } else if (!strcmp(argv[i], "--nohttp")) {
 994                         ctx.env.no_http = "1";
 995                 } else if (skip_prefix(argv[i], "--query=", &arg)) {
 996                         ctx.qry.raw = xstrdup(arg);
 997                 } else if (skip_prefix(argv[i], "--repo=", &arg)) {
 998                         ctx.qry.repo = xstrdup(arg);
 999                 } else if (skip_prefix(argv[i], "--page=", &arg)) {
1000                         ctx.qry.page = xstrdup(arg);
1001                 } else if (skip_prefix(argv[i], "--head=", &arg)) {
1002                         ctx.qry.head = xstrdup(arg);
1003                         ctx.qry.has_symref = 1;
1004                 } else if (skip_prefix(argv[i], "--oid=", &arg)) {
1005                         ctx.qry.oid = xstrdup(arg);
1006                         ctx.qry.has_oid = 1;
1007                 } else if (skip_prefix(argv[i], "--ofs=", &arg)) {
1008                         ctx.qry.ofs = atoi(arg);
1009                 } else if (skip_prefix(argv[i], "--scan-tree=", &arg) ||
1010                            skip_prefix(argv[i], "--scan-path=", &arg)) {
1011                         /*
1012                          * HACK: The global snapshot bit mask defines the set
1013                          * of allowed snapshot formats, but the config file
1014                          * hasn't been parsed yet so the mask is currently 0.
1015                          * By setting all bits high before scanning we make
1016                          * sure that any in-repo cgitrc snapshot setting is
1017                          * respected by scan_tree().
1018                          *
1019                          * NOTE: We assume that there aren't more than 8
1020                          * different snapshot formats supported by cgit...
1021                          */
1022                         ctx.cfg.snapshots = 0xFF;
1023                         scan++;
1024                         scan_tree(arg, repo_config);
1025                 }
1026         }
1027         if (scan) {
1028                 qsort(cgit_repolist.repos, cgit_repolist.count,
1029                         sizeof(struct cgit_repo), cmp_repos);
1030                 print_repolist(stdout, &cgit_repolist, 0);
1031                 exit(0);
1032         }
1033 }
1034
1035 static int calc_ttl(void)
1036 {
1037         if (!ctx.repo)
1038                 return ctx.cfg.cache_root_ttl;
1039
1040         if (!ctx.qry.page)
1041                 return ctx.cfg.cache_repo_ttl;
1042
1043         if (!strcmp(ctx.qry.page, "about"))
1044                 return ctx.cfg.cache_about_ttl;
1045
1046         if (!strcmp(ctx.qry.page, "snapshot"))
1047                 return ctx.cfg.cache_snapshot_ttl;
1048
1049         if (ctx.qry.has_oid)
1050                 return ctx.cfg.cache_static_ttl;
1051
1052         if (ctx.qry.has_symref)
1053                 return ctx.cfg.cache_dynamic_ttl;
1054
1055         return ctx.cfg.cache_repo_ttl;
1056 }
1057
1058 int cmd_main(int argc, const char **argv)
1059 {
1060         const char *path;
1061         int err, ttl;
1062
1063         cgit_init_filters();
1064         atexit(cgit_cleanup_filters);
1065
1066         prepare_context();
1067         cgit_repolist.length = 0;
1068         cgit_repolist.count = 0;
1069         cgit_repolist.repos = NULL;
1070
1071         cgit_parse_args(argc, argv);
1072         parse_configfile(expand_macros(ctx.env.cgit_config), config_cb);
1073         ctx.repo = NULL;
1074         http_parse_querystring(ctx.qry.raw, querystring_cb);
1075
1076         /* If virtual-root isn't specified in cgitrc, lets pretend
1077          * that virtual-root equals SCRIPT_NAME, minus any possibly
1078          * trailing slashes.
1079          */
1080         if (!ctx.cfg.virtual_root && ctx.cfg.script_name)
1081                 ctx.cfg.virtual_root = ensure_end(ctx.cfg.script_name, '/');
1082
1083         /* If no url parameter is specified on the querystring, lets
1084          * use PATH_INFO as url. This allows cgit to work with virtual
1085          * urls without the need for rewriterules in the webserver (as
1086          * long as PATH_INFO is included in the cache lookup key).
1087          */
1088         path = ctx.env.path_info;
1089         if (!ctx.qry.url && path) {
1090                 if (path[0] == '/')
1091                         path++;
1092                 ctx.qry.url = xstrdup(path);
1093                 if (ctx.qry.raw) {
1094                         char *newqry = fmtalloc("%s?%s", path, ctx.qry.raw);
1095                         free(ctx.qry.raw);
1096                         ctx.qry.raw = newqry;
1097                 } else
1098                         ctx.qry.raw = xstrdup(ctx.qry.url);
1099                 cgit_parse_url(ctx.qry.url);
1100         }
1101
1102         /* Before we go any further, we set ctx.env.authenticated by checking to see
1103          * if the supplied cookie is valid. All cookies are valid if there is no
1104          * auth_filter. If there is an auth_filter, the filter decides. */
1105         authenticate_cookie();
1106
1107         ttl = calc_ttl();
1108         if (ttl < 0)
1109                 ctx.page.expires += 10 * 365 * 24 * 60 * 60; /* 10 years */
1110         else
1111                 ctx.page.expires += ttl * 60;
1112         if (!ctx.env.authenticated || (ctx.env.request_method && !strcmp(ctx.env.request_method, "HEAD")))
1113                 ctx.cfg.cache_size = 0;
1114         err = cache_process(ctx.cfg.cache_size, ctx.cfg.cache_root,
1115                             ctx.qry.raw, ttl, process_request);
1116         cgit_cleanup_filters();
1117         if (err)
1118                 cgit_print_error("Error processing page: %s (%d)",
1119                                  strerror(err), err);
1120         return err;
1121 }