| -rw-r--r-- | cache.c | 1 |
1 files changed, 1 insertions, 0 deletions
@@ -1,105 +1,106 @@ /* 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" +#include "cache.h" const int NOLOCK = -1; char *cache_safe_filename(const char *unsafe) { static char buf[4][PATH_MAX]; static int bufidx; char *s; char c; bufidx++; bufidx &= 3; s = buf[bufidx]; while(unsafe && (c = *unsafe++) != 0) { if (c == '/' || c == ' ' || c == '&' || c == '|' || c == '>' || c == '<' || c == '.') c = '_'; *s++ = c; } *s = '\0'; return buf[bufidx]; } int cache_exist(struct cacheitem *item) { if (stat(item->name, &item->st)) { item->st.st_mtime = 0; return 0; } return 1; } int cache_create_dirs() { char *path; path = fmt("%s", ctx.cfg.cache_root); if (mkdir(path, S_IRWXU) && errno!=EEXIST) return 0; if (!ctx.repo) return 0; path = fmt("%s/%s", ctx.cfg.cache_root, cache_safe_filename(ctx.repo->url)); if (mkdir(path, S_IRWXU) && errno!=EEXIST) return 0; if (ctx.qry.page) { path = fmt("%s/%s/%s", ctx.cfg.cache_root, cache_safe_filename(ctx.repo->url), ctx.qry.page); if (mkdir(path, S_IRWXU) && errno!=EEXIST) return 0; } return 1; } int cache_refill_overdue(const char *lockfile) { struct stat st; if (stat(lockfile, &st)) return 0; else return (time(NULL) - st.st_mtime > ctx.cfg.cache_max_create_time); } int cache_lock(struct cacheitem *item) { int i = 0; char *lockfile = xstrdup(fmt("%s.lock", item->name)); top: if (++i > ctx.cfg.max_lock_attempts) die("cache_lock: unable to lock %s: %s", item->name, strerror(errno)); 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 && cache_refill_overdue(lockfile) && !unlink(lockfile)) goto top; free(lockfile); return (item->fd > 0); } int cache_unlock(struct cacheitem *item) { close(item->fd); |