/usr/include/proftpd/memcache.h is in proftpd-dev 1.3.4a-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* ProFTPD - FTP server daemon
* Copyright (c) 2010-2011 The ProFTPD Project team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA.
*
* As a special exemption, The ProFTPD Project team and other respective
* copyright holders give permission to link this program with OpenSSL, and
* distribute the resulting executable, without including the source code for
* OpenSSL in the source distribution.
*/
/* Memcache support
* $Id: memcache.h,v 1.12 2011/05/23 20:35:35 castaglia Exp $
*/
#ifndef PR_MEMCACHE_H
#define PR_MEMCACHE_H
#include "conf.h"
#include "tpl.h"
typedef struct mcache_rec pr_memcache_t;
/* Core API for use by modules et al */
/* This function returns the pr_memcache_t for the current session; if one
* does not exist, it will be allocated.
*/
pr_memcache_t *pr_memcache_conn_get(void);
pr_memcache_t *pr_memcache_conn_new(pool *p, module *owner,
unsigned long flags, uint64_t nreplicas);
int pr_memcache_conn_close(pr_memcache_t *mcache);
/* Set a namespace key prefix, to be used by this connection for all of the
* operations involving items. In practice, the key prefix should always
* be a string which does contain any space characters.
*
* Different modules can use different namespace prefixes for their keys.
* Setting NULL for the namespace prefix clears it.
*/
int pr_memcache_conn_set_namespace(pr_memcache_t *mcache, module *m,
const char *prefix);
int pr_memcache_add(pr_memcache_t *mcache, module *m, const char *key,
void *value, size_t valuesz, time_t expires, uint32_t flags);
int pr_memcache_decr(pr_memcache_t *mcache, module *m, const char *key,
uint32_t decr, uint64_t *value);
void *pr_memcache_get(pr_memcache_t *mcache, module *m, const char *key,
size_t *valuesz, uint32_t *flags);
char *pr_memcache_get_str(pr_memcache_t *mcache, module *m, const char *key,
uint32_t *flags);
int pr_memcache_incr(pr_memcache_t *mcache, module *m, const char *key,
uint32_t incr, uint64_t *value);
int pr_memcache_remove(pr_memcache_t *mcache, module *m, const char *key,
time_t expires);
int pr_memcache_set(pr_memcache_t *mcache, module *m, const char *key,
void *value, size_t valuesz, time_t expires, uint32_t flags);
/* Variants of the above, where the key values are arbitrary bits rather
* than being assumed to be strings.
*/
int pr_memcache_kadd(pr_memcache_t *mcache, module *m, const char *key,
size_t keysz, void *value, size_t valuesz, time_t expires, uint32_t flags);
int pr_memcache_kdecr(pr_memcache_t *mcache, module *m, const char *key,
size_t keysz, uint32_t decr, uint64_t *value);
void *pr_memcache_kget(pr_memcache_t *mcache, module *m, const char *key,
size_t keysz, size_t *valuesz, uint32_t *flags);
char *pr_memcache_kget_str(pr_memcache_t *mcache, module *m, const char *key,
size_t keysz, uint32_t *flags);
int pr_memcache_kincr(pr_memcache_t *mcache, module *m, const char *key,
size_t keysz, uint32_t incr, uint64_t *value);
int pr_memcache_kremove(pr_memcache_t *mcache, module *m, const char *key,
size_t keysz, time_t expires);
int pr_memcache_kset(pr_memcache_t *mcache, module *m, const char *key,
size_t keysz, void *value, size_t valuesz, time_t expires, uint32_t flags);
/* For internal use only */
unsigned long memcache_get_sess_flags(void);
#define PR_MEMCACHE_FL_NO_BINARY_PROTOCOL 0x001
#define PR_MEMCACHE_FL_NO_RANDOM_REPLICA_READ 0x002
int memcache_set_sess_connect_failures(uint64_t count);
int memcache_set_sess_flags(unsigned long flags);
int memcache_set_sess_replicas(uint64_t count);
int memcache_set_servers(void *server_list);
/* Configure the timeouts in millisecs.
*
* The last timeout argument is timeout in seconds. When a server is marked
* as "dead", that server will be automatically ejected from the pool of servers
* used for storage/retrieval. This "ejected timeout" argument configures the
* number of seconds that an ejected server will be out of the pool, before
* being added back in.
*/
int memcache_set_timeouts(unsigned long conn_millis, unsigned long read_millis,
unsigned long write_millis, unsigned long ejected_sec);
int memcache_clear(void);
int memcache_init(void);
#endif /* PR_MEMCACHE_H */
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