| -rw-r--r-- | cache.c | 8 |
1 files changed, 8 insertions, 0 deletions
@@ -1,86 +1,94 @@ +/* cache.c: cache management + * + * Copyright (C) 2006 Lars Hjemli + * + * Licensed under GNU General Public License v2 + * (see COPYING for full license text) + */ + #include "cgit.h" const int NOLOCK = -1; int cache_lookup(struct cacheitem *item) { if (!cgit_query_repo) { item->name = xstrdup(fmt("%s/index.html", cgit_cache_root)); item->ttl = cgit_cache_root_ttl; } else if (!cgit_query_page) { item->name = xstrdup(fmt("%s/%s/index.html", cgit_cache_root, cgit_query_repo)); item->ttl = cgit_cache_repo_ttl; } else { item->name = xstrdup(fmt("%s/%s/%s/%s.html", cgit_cache_root, cgit_query_repo, cgit_query_page, cgit_querystring)); if (cgit_query_has_symref) item->ttl = cgit_cache_dynamic_ttl; else if (cgit_query_has_sha1) item->ttl = cgit_cache_static_ttl; else item->ttl = cgit_cache_repo_ttl; } if (stat(item->name, &item->st)) { item->st.st_mtime = 0; return 0; } return 1; } int cache_create_dirs() { char *path; if (!cgit_query_repo) return 0; path = fmt("%s/%s", cgit_cache_root, cgit_query_repo); if (mkdir(path, S_IRWXU) && errno!=EEXIST) return 0; if (cgit_query_page) { path = fmt("%s/%s/%s", cgit_cache_root, cgit_query_repo, cgit_query_page); if (mkdir(path, S_IRWXU) && errno!=EEXIST) return 0; } return 1; } int cache_lock(struct cacheitem *item) { int ret; char *lockfile = fmt("%s.lock", item->name); top: item->fd = open(lockfile, O_WRONLY | O_CREAT | O_EXCL, S_IRUSR|S_IWUSR); if (item->fd == NOLOCK && errno == ENOENT && cache_create_dirs()) goto top; if (item->fd == NOLOCK && errno == EEXIST) { struct stat st; time_t t; if (stat(lockfile, &st)) return ret; t = time(NULL); if (t-st.st_mtime > cgit_cache_max_create_time && !unlink(lockfile)) goto top; return 0; } return (item->fd > 0); } int cache_unlock(struct cacheitem *item) { close(item->fd); return (rename(fmt("%s.lock", item->name), item->name) == 0); } int cache_expired(struct cacheitem *item) { if (item->ttl < 0) return 0; return item->st.st_mtime + item->ttl * 60 < time(NULL); } |