/usr/include/h2o/filecache.h is in libh2o-dev-common 2.2.4+dfsg-1build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright (c) 2015 DeNA Co., Ltd., Kazuho Oku
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#ifndef h2o__filecache_h
#define h2o__filecache_h
#include <stddef.h>
#include <sys/stat.h>
#include <time.h>
#include "h2o/linklist.h"
#include "h2o/memory.h"
#include "h2o/time_.h"
#define H2O_FILECACHE_ETAG_MAXLEN (sizeof("\"deadbeef-deadbeefdeadbeef\"") - 1)
typedef struct st_h2o_filecache_ref_t {
int fd;
size_t _refcnt;
h2o_linklist_t _lru;
union {
struct {
/* used if fd != -1 */
struct stat st;
struct {
struct tm gm;
char str[H2O_TIMESTR_RFC1123_LEN + 1];
} _last_modified;
struct {
char buf[H2O_FILECACHE_ETAG_MAXLEN + 1];
size_t len;
} _etag;
};
/* used if fd != -1 */
int open_err;
};
char _path[1];
} h2o_filecache_ref_t;
typedef struct st_h2o_filecache_t h2o_filecache_t;
h2o_filecache_t *h2o_filecache_create(size_t capacity);
void h2o_filecache_destroy(h2o_filecache_t *cache);
void h2o_filecache_clear(h2o_filecache_t *cache);
h2o_filecache_ref_t *h2o_filecache_open_file(h2o_filecache_t *cache, const char *path, int oflag);
void h2o_filecache_close_file(h2o_filecache_ref_t *ref);
struct tm *h2o_filecache_get_last_modified(h2o_filecache_ref_t *ref, char *outbuf);
size_t h2o_filecache_get_etag(h2o_filecache_ref_t *ref, char *outbuf);
#endif
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