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htcacheclean.c
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/* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* htcacheclean.c: simple program for cleaning of
* the disk cache of the Apache HTTP server
*
* Contributed by Andreas Steinmetz <ast domdv.de>
* 8 Oct 2004
*/
#include "apr.h"
#include "apr_lib.h"
#include "apr_strings.h"
#include "apr_file_io.h"
#include "apr_file_info.h"
#include "apr_pools.h"
#include "apr_hash.h"
#include "apr_thread_proc.h"
#include "apr_signal.h"
#include "apr_getopt.h"
#include "apr_md5.h"
#include "apr_ring.h"
#include "apr_date.h"
#include "apr_buckets.h"
#include "../modules/cache/cache_common.h"
#include "../modules/cache/cache_disk_common.h"
#if APR_HAVE_UNISTD_H
#include <unistd.h>
#endif
#if APR_HAVE_STDLIB_H
#include <stdlib.h>
#endif
/* define the following for debugging */
#undef DEBUG
/*
* Note: on Linux delays <= 2ms are busy waits without
* scheduling, so never use a delay <= 2ms below
*/
#define NICE_DELAY 10000 /* usecs */
#define DELETE_NICE 10 /* be nice after this amount of delete ops */
#define STAT_ATTEMPTS 10 /* maximum stat attempts for a file */
#define STAT_DELAY 5000 /* usecs */
#define HEADER 1 /* headers file */
#define DATA 2 /* body file */
#define TEMP 4 /* temporary file */
#define HEADERDATA (HEADER|DATA)
#define MAXDEVIATION 3600 /* secs */
#define SECS_PER_MIN 60
#define KBYTE 1024
#define MBYTE 1048576
#define GBYTE 1073741824
#define DIRINFO (APR_FINFO_MTIME|APR_FINFO_SIZE|APR_FINFO_TYPE|APR_FINFO_LINK)
typedef struct _direntry {
APR_RING_ENTRY(_direntry) link;
int type; /* type of file/fileset: TEMP, HEADER, DATA, HEADERDATA */
apr_time_t htime; /* headers file modification time */
apr_time_t dtime; /* body file modification time */
apr_off_t hsize; /* headers file size */
apr_off_t dsize; /* body or temporary file size */
char *basename; /* file/fileset base name */
} DIRENTRY;
typedef struct _entry {
APR_RING_ENTRY(_entry) link;
apr_time_t expire; /* cache entry exiration time */
apr_time_t response_time; /* cache entry time of last response to client */
apr_time_t htime; /* headers file modification time */
apr_time_t dtime; /* body file modification time */
apr_off_t hsize; /* headers file size */
apr_off_t dsize; /* body or temporary file size */
char *basename; /* fileset base name */
} ENTRY;
static int delcount; /* file deletion count for nice mode */
static int interrupted; /* flag: true if SIGINT or SIGTERM occurred */
static int realclean; /* flag: true means user said apache is not running */
static int verbose; /* flag: true means print statistics */
static int benice; /* flag: true means nice mode is activated */
static int dryrun; /* flag: true means dry run, don't actually delete
anything */
static int deldirs; /* flag: true means directories should be deleted */
static int listurls; /* flag: true means list cached urls */
static int listextended;/* flag: true means list cached urls */
static int baselen; /* string length of the path to the proxy directory */
static apr_time_t now; /* start time of this processing run */
static apr_file_t *errfile; /* stderr file handle */
static apr_file_t *outfile; /* stdout file handle */
static apr_off_t unsolicited; /* file size summary for deleted unsolicited
files */
static ENTRY root; /* ENTRY ring anchor */
/* short program name as called */
static const char *shortname = "htcacheclean";
/* what did we clean? */
struct stats {
apr_off_t total;
apr_off_t sum;
apr_off_t max;
apr_off_t ntotal;
apr_off_t nodes;
apr_off_t inodes;
apr_off_t etotal;
apr_off_t entries;
apr_off_t dfuture;
apr_off_t dexpired;
apr_off_t dfresh;
};
#ifdef DEBUG
/*
* fake delete for debug purposes
*/
#define apr_file_remove fake_file_remove
static void fake_file_remove(char *pathname, apr_pool_t *p)
{
apr_finfo_t info;
/* stat and printing to simulate some deletion system load and to
display what would actually have happened */
apr_stat(&info, pathname, DIRINFO, p);
apr_file_printf(errfile, "would delete %s" APR_EOL_STR, pathname);
}
#endif
/*
* called on SIGINT or SIGTERM
*/
static void setterm(int unused)
{
#ifdef DEBUG
apr_file_printf(errfile, "interrupt" APR_EOL_STR);
#endif
interrupted = 1;
}
/*
* called in out of memory condition
*/
static int oom(int unused)
{
static int called = 0;
/* be careful to call exit() only once */
if (!called) {
called = 1;
exit(1);
}
return APR_ENOMEM;
}
/*
* print purge statistics
*/
static void printstats(char *path, struct stats *s)
{
char ttype, stype, mtype, utype;
apr_off_t tfrag, sfrag, ufrag;
if (!verbose) {
return;
}
ttype = 'K';
tfrag = ((s->total * 10) / KBYTE) % 10;
s->total /= KBYTE;
if (s->total >= KBYTE) {
ttype = 'M';
tfrag = ((s->total * 10) / KBYTE) % 10;
s->total /= KBYTE;
}
stype = 'K';
sfrag = ((s->sum * 10) / KBYTE) % 10;
s->sum /= KBYTE;
if (s->sum >= KBYTE) {
stype = 'M';
sfrag = ((s->sum * 10) / KBYTE) % 10;
s->sum /= KBYTE;
}
mtype = 'K';
s->max /= KBYTE;
if (s->max >= KBYTE) {
mtype = 'M';
s->max /= KBYTE;
}
apr_file_printf(errfile, "Cleaned %s. Statistics:" APR_EOL_STR, path);
if (unsolicited) {
utype = 'K';
ufrag = ((unsolicited * 10) / KBYTE) % 10;
unsolicited /= KBYTE;
if (unsolicited >= KBYTE) {
utype = 'M';
ufrag = ((unsolicited * 10) / KBYTE) % 10;
unsolicited /= KBYTE;
}
if (!unsolicited && !ufrag) {
ufrag = 1;
}
apr_file_printf(errfile, "unsolicited size %d.%d%c" APR_EOL_STR,
(int)(unsolicited), (int)(ufrag), utype);
}
apr_file_printf(errfile, "size limit %" APR_OFF_T_FMT ".0%c" APR_EOL_STR,
s->max, mtype);
apr_file_printf(errfile, "inodes limit %" APR_OFF_T_FMT APR_EOL_STR,
s->inodes);
apr_file_printf(
errfile,
"total size was %" APR_OFF_T_FMT ".%" APR_OFF_T_FMT "%c, total size now "
"%" APR_OFF_T_FMT ".%" APR_OFF_T_FMT "%c" APR_EOL_STR, s->total,
tfrag, ttype, s->sum, sfrag, stype);
apr_file_printf(errfile, "total inodes was %" APR_OFF_T_FMT
", total %sinodes now "
"%" APR_OFF_T_FMT APR_EOL_STR, s->ntotal, dryrun && deldirs ? "estimated "
: "", s->nodes);
apr_file_printf(
errfile,
"total entries was %" APR_OFF_T_FMT ", total entries now %" APR_OFF_T_FMT
APR_EOL_STR, s->etotal, s->entries);
apr_file_printf(
errfile,
"%" APR_OFF_T_FMT " entries deleted (%" APR_OFF_T_FMT " from future, %"
APR_OFF_T_FMT " expired, %" APR_OFF_T_FMT " fresh)" APR_EOL_STR,
(s->etotal - s->entries), s->dfuture, s->dexpired, s->dfresh);
}
/**
* Round the value up to the given threshold.
*/
static apr_size_t round_up(apr_size_t val, apr_off_t round)
{
if (round > 1) {
return (apr_size_t)(((val + round - 1) / round) * round);
}
return val;
}
/*
* delete parent directories
*/
static void delete_parent(const char *path, const char *basename,
apr_off_t *nodes, apr_pool_t *pool)
{
char *nextpath, *name;
apr_pool_t *p;
/* temp pool, otherwise lots of memory could be allocated */
apr_pool_create(&p, pool);
name = apr_pstrdup(p, basename);
/* If asked to delete dirs, do so now. We don't care if it fails.
* If it fails, it likely means there was something else there.
*/
if (deldirs && !dryrun) {
const char *vary;
char *end = strrchr(name, '/');
while (end) {
*end = 0;
/* remove the directory */
nextpath = apr_pstrcat(p, path, "/", name, NULL);
if (!apr_dir_remove(nextpath, p)) {
(*nodes)--;
/* vary directory found? */
vary = strstr(name, CACHE_VDIR_SUFFIX);
if (vary && !vary[sizeof(CACHE_VDIR_SUFFIX) - 1]) {
nextpath = apr_pstrcat(p, path, "/", apr_pstrndup(p, name, vary
- name), NULL);
if (!apr_file_remove(nextpath, p)) {
(*nodes)--;
}
}
}
else {
break;
}
end = strrchr(name, '/');
}
}
apr_pool_destroy(p);
if (benice) {
if (++delcount >= DELETE_NICE) {
apr_sleep(NICE_DELAY);
delcount = 0;
}
}
}
/*
* delete a single file
*/
static void delete_file(char *path, char *basename, apr_off_t *nodes,
apr_pool_t *pool)
{
char *nextpath;
apr_pool_t *p;
/* temp pool, otherwise lots of memory could be allocated */
apr_pool_create(&p, pool);
nextpath = apr_pstrcat(p, path, "/", basename, NULL);
if (dryrun) {
apr_finfo_t finfo;
if (!apr_stat(&finfo, nextpath, APR_FINFO_NLINK, p)) {
(*nodes)--;
}
}
else if (!apr_file_remove(nextpath, p)) {
(*nodes)--;
}
apr_pool_destroy(p);
if (benice) {
if (++delcount >= DELETE_NICE) {
apr_sleep(NICE_DELAY);
delcount = 0;
}
}
delete_parent(path, basename, nodes, pool);
}
/*
* delete cache file set
*/
static void delete_entry(char *path, char *basename, apr_off_t *nodes,
apr_pool_t *pool)
{
char *nextpath;
apr_pool_t *p;
/* temp pool, otherwise lots of memory could be allocated */
apr_pool_create(&p, pool);
nextpath = apr_pstrcat(p, path, "/", basename, CACHE_HEADER_SUFFIX, NULL);
if (dryrun) {
apr_finfo_t finfo;
if (!apr_stat(&finfo, nextpath, APR_FINFO_NLINK, p)) {
(*nodes)--;
}
}
else if (!apr_file_remove(nextpath, p)) {
(*nodes)--;
}
nextpath = apr_pstrcat(p, path, "/", basename, CACHE_DATA_SUFFIX, NULL);
if (dryrun) {
apr_finfo_t finfo;
if (!apr_stat(&finfo, nextpath, APR_FINFO_NLINK, p)) {
(*nodes)--;
}
}
else if (!apr_file_remove(nextpath, p)) {
(*nodes)--;
}
apr_pool_destroy(p);
if (benice) {
delcount += 2;
if (delcount >= DELETE_NICE) {
apr_sleep(NICE_DELAY);
delcount = 0;
}
}
delete_parent(path, basename, nodes, pool);
}
/*
* list the cache directory tree
*/
static int list_urls(char *path, apr_pool_t *pool, apr_off_t round)
{
apr_dir_t *dir;
apr_finfo_t info;
apr_size_t len;
apr_pool_t *p;
apr_file_t *fd;
const char *ext, *nextpath;
char *url;
apr_uint32_t format;
disk_cache_info_t disk_info;
apr_pool_create(&p, pool);
if (apr_dir_open(&dir, path, p) != APR_SUCCESS) {
return 1;
}
while (apr_dir_read(&info, APR_FINFO_TYPE, dir) == APR_SUCCESS && !interrupted) {
if (info.filetype == APR_DIR) {
if (!strcmp(info.name, ".") || !strcmp(info.name, "..")) {
continue;
}
if (list_urls(apr_pstrcat(p, path, "/", info.name, NULL), pool, round)) {
return 1;
}
}
else if (info.filetype == APR_REG) {
ext = strchr(info.name, '.');
if (ext && !strcasecmp(ext, CACHE_HEADER_SUFFIX)) {
nextpath = apr_pstrcat(p, path, "/", info.name, NULL);
if (apr_file_open(&fd, nextpath, APR_FOPEN_READ
| APR_FOPEN_BINARY, APR_OS_DEFAULT, p) == APR_SUCCESS) {
len = sizeof(format);
if (apr_file_read_full(fd, &format, len, &len)
== APR_SUCCESS) {
if (format == DISK_FORMAT_VERSION) {
apr_off_t offset = 0;
apr_file_seek(fd, APR_SET, &offset);
len = sizeof(disk_cache_info_t);
if (apr_file_read_full(fd, &disk_info, len, &len)
== APR_SUCCESS) {
len = disk_info.name_len;
url = apr_palloc(p, len + 1);
url[len] = 0;
if (apr_file_read_full(fd, url, len, &len)
== APR_SUCCESS) {
if (listextended) {
apr_finfo_t hinfo, dinfo;
/* stat the header file */
if (APR_SUCCESS != apr_file_info_get(
&hinfo, APR_FINFO_SIZE, fd)) {
/* ignore the file */
}
else if (disk_info.has_body && APR_SUCCESS
!= apr_stat(
&dinfo,
apr_pstrcat(
p,
path,
"/",
apr_pstrndup(
p,
info.name,
ext
- info.name),
CACHE_DATA_SUFFIX,
NULL),
APR_FINFO_SIZE
| APR_FINFO_IDENT,
p)) {
/* ignore the file */
}
else if (disk_info.has_body && (dinfo.device
!= disk_info.device
|| dinfo.inode
!= disk_info.inode)) {
/* ignore the file */
}
else {
apr_file_printf(
outfile,
"%s %" APR_SIZE_T_FMT
" %" APR_SIZE_T_FMT
" %d %" APR_SIZE_T_FMT
" %" APR_TIME_T_FMT
" %" APR_TIME_T_FMT
" %" APR_TIME_T_FMT
" %" APR_TIME_T_FMT
" %d %d\n",
url,
round_up((apr_size_t)hinfo.size, round),
round_up(
disk_info.has_body ? (apr_size_t)dinfo.size
: 0, round),
disk_info.status,
disk_info.entity_version,
disk_info.date,
disk_info.expire,
disk_info.request_time,
disk_info.response_time,
disk_info.has_body,
disk_info.header_only);
}
}
else {
apr_finfo_t dinfo;
/* stat the data file */
if (disk_info.has_body && APR_SUCCESS
!= apr_stat(
&dinfo,
apr_pstrcat(
p,
path,
"/",
apr_pstrndup(
p,
info.name,
ext
- info.name),
CACHE_DATA_SUFFIX,
NULL),
APR_FINFO_SIZE
| APR_FINFO_IDENT,
p)) {
/* ignore the file */
}
else if (disk_info.has_body && (dinfo.device
!= disk_info.device
|| dinfo.inode
!= disk_info.inode)) {
/* ignore the file */
}
else {
apr_file_printf(outfile, "%s\n",
url);
}
}
}
break;
}
}
}
apr_file_close(fd);
}
}
}
}
apr_dir_close(dir);
if (interrupted) {
return 1;
}
apr_pool_destroy(p);
if (benice) {
apr_sleep(NICE_DELAY);
}
if (interrupted) {
return 1;
}
return 0;
}
/*
* walk the cache directory tree
*/
static int process_dir(char *path, apr_pool_t *pool, apr_off_t *nodes)
{
apr_dir_t *dir;
apr_pool_t *p;
apr_hash_t *h;
apr_hash_index_t *i;
apr_file_t *fd;
apr_status_t status;
apr_finfo_t info;
apr_size_t len;
apr_time_t current, deviation;
char *nextpath, *base, *ext;
DIRENTRY *d, *t, *n, anchor;
ENTRY *e;
int skip, retries;
disk_cache_info_t disk_info;
APR_RING_INIT(&anchor.link, _direntry, link);
apr_pool_create(&p, pool);
h = apr_hash_make(p);
fd = NULL;
deviation = MAXDEVIATION * APR_USEC_PER_SEC;
if (apr_dir_open(&dir, path, p) != APR_SUCCESS) {
return 1;
}
while (apr_dir_read(&info, 0, dir) == APR_SUCCESS && !interrupted) {
if (!strcmp(info.name, ".") || !strcmp(info.name, "..")) {
continue;
}
d = apr_pcalloc(p, sizeof(DIRENTRY));
d->basename = apr_pstrcat(p, path, "/", info.name, NULL);
APR_RING_INSERT_TAIL(&anchor.link, d, _direntry, link);
(*nodes)++;
}
apr_dir_close(dir);
if (interrupted) {
return 1;
}
skip = baselen + 1;
for (d = APR_RING_FIRST(&anchor.link);
!interrupted && d != APR_RING_SENTINEL(&anchor.link, _direntry, link);
d=n) {
n = APR_RING_NEXT(d, link);
base = strrchr(d->basename, '/');
if (!base++) {
base = d->basename;
}
ext = strchr(base, '.');
/* there may be temporary files which may be gone before
* processing, always skip these if not in realclean mode
*/
if (!ext && !realclean) {
if (!strncasecmp(base, AP_TEMPFILE_BASE, AP_TEMPFILE_BASELEN)
&& strlen(base) == AP_TEMPFILE_NAMELEN) {
continue;
}
}
/* this may look strange but apr_stat() may return an error which
* is system dependent and there may be transient failures,
* so just blindly retry for a short while
*/
retries = STAT_ATTEMPTS;
status = APR_SUCCESS;
do {
if (status != APR_SUCCESS) {
apr_sleep(STAT_DELAY);
}
status = apr_stat(&info, d->basename, DIRINFO, p);
} while (status != APR_SUCCESS && !interrupted && --retries);
/* what may happen here is that apache did create a file which
* we did detect but then does delete the file before we can
* get file information, so if we don't get any file information
* we will ignore the file in this case
*/
if (status != APR_SUCCESS) {
if (!realclean && !interrupted) {
continue;
}
return 1;
}
if (info.filetype == APR_DIR) {
char *dirpath = apr_pstrdup(p, d->basename);
if (process_dir(d->basename, pool, nodes)) {
return 1;
}
/* When given the -t option htcacheclean does not
* delete directories that are already empty, so we'll do that here
* since process_dir checks all the directories.
* If it fails, it likely means there was something else there.
*/
if (deldirs && !dryrun) {
apr_dir_remove(dirpath, p);
}
continue;
}
if (info.filetype != APR_REG) {
continue;
}
if (!ext) {
if (!strncasecmp(base, AP_TEMPFILE_BASE, AP_TEMPFILE_BASELEN)
&& strlen(base) == AP_TEMPFILE_NAMELEN) {
d->basename += skip;
d->type = TEMP;
d->dsize = info.size;
apr_hash_set(h, d->basename, APR_HASH_KEY_STRING, d);
}
continue;
}
if (!strcasecmp(ext, CACHE_HEADER_SUFFIX)) {
*ext = '\0';
d->basename += skip;
/* if a user manually creates a '.header' file */
if (d->basename[0] == '\0') {
continue;
}
t = apr_hash_get(h, d->basename, APR_HASH_KEY_STRING);
if (t) {
d = t;
}
d->type |= HEADER;
d->htime = info.mtime;
d->hsize = info.size;
apr_hash_set(h, d->basename, APR_HASH_KEY_STRING, d);
continue;
}
if (!strcasecmp(ext, CACHE_DATA_SUFFIX)) {
*ext = '\0';
d->basename += skip;
/* if a user manually creates a '.data' file */
if (d->basename[0] == '\0') {
continue;
}
t = apr_hash_get(h, d->basename, APR_HASH_KEY_STRING);
if (t) {
d = t;
}
d->type |= DATA;
d->dtime = info.mtime;
d->dsize = info.size;
apr_hash_set(h, d->basename, APR_HASH_KEY_STRING, d);
}
}
if (interrupted) {
return 1;
}
path[baselen] = '\0';
for (i = apr_hash_first(p, h); i && !interrupted; i = apr_hash_next(i)) {
void *hvalue;
apr_uint32_t format;
apr_hash_this(i, NULL, NULL, &hvalue);
d = hvalue;
switch(d->type) {
case HEADERDATA:
nextpath = apr_pstrcat(p, path, "/", d->basename,
CACHE_HEADER_SUFFIX, NULL);
if (apr_file_open(&fd, nextpath, APR_FOPEN_READ | APR_FOPEN_BINARY,
APR_OS_DEFAULT, p) == APR_SUCCESS) {
len = sizeof(format);
if (apr_file_read_full(fd, &format, len,
&len) == APR_SUCCESS) {
if (format == DISK_FORMAT_VERSION) {
apr_off_t offset = 0;
apr_file_seek(fd, APR_SET, &offset);
len = sizeof(disk_cache_info_t);
if (apr_file_read_full(fd, &disk_info, len,
&len) == APR_SUCCESS) {
apr_file_close(fd);
e = apr_palloc(pool, sizeof(ENTRY));
APR_RING_INSERT_TAIL(&root.link, e, _entry, link);
e->expire = disk_info.expire;
e->response_time = disk_info.response_time;
e->htime = d->htime;
e->dtime = d->dtime;
e->hsize = d->hsize;
e->dsize = d->dsize;
e->basename = apr_pstrdup(pool, d->basename);
if (!disk_info.has_body) {
delete_file(path, apr_pstrcat(p, path, "/",
d->basename, CACHE_DATA_SUFFIX, NULL),
nodes, p);
}
break;
}
else {
apr_file_close(fd);
}
}
else if (format == VARY_FORMAT_VERSION) {
apr_finfo_t finfo;
/* This must be a URL that added Vary headers later,
* so kill the orphaned .data file
*/
apr_file_close(fd);
if (apr_stat(&finfo, apr_pstrcat(p, nextpath,
CACHE_VDIR_SUFFIX, NULL), APR_FINFO_TYPE, p)
|| finfo.filetype != APR_DIR) {
delete_entry(path, d->basename, nodes, p);
}
else {
delete_file(path, apr_pstrcat(p, path, "/",
d->basename, CACHE_DATA_SUFFIX, NULL),
nodes, p);
}
break;
}
else {
/* We didn't recognise the format, kill the files */
apr_file_close(fd);
delete_entry(path, d->basename, nodes, p);
break;
}
}
else {
apr_file_close(fd);
}
}
/* we have a somehow unreadable headers file which is associated
* with a data file. this may be caused by apache currently
* rewriting the headers file. thus we may delete the file set
* either in realclean mode or if the headers file modification
* timestamp is not within a specified positive or negative offset
* to the current time.
*/
current = apr_time_now();
if (realclean || d->htime < current - deviation
|| d->htime > current + deviation) {
delete_entry(path, d->basename, nodes, p);
unsolicited += d->hsize;
unsolicited += d->dsize;
}
break;
/* single data and header files may be deleted either in realclean
* mode or if their modification timestamp is not within a
* specified positive or negative offset to the current time.
* this handling is necessary due to possible race conditions
* between apache and this process
*/
case HEADER:
current = apr_time_now();
nextpath = apr_pstrcat(p, path, "/", d->basename,
CACHE_HEADER_SUFFIX, NULL);
if (apr_file_open(&fd, nextpath, APR_FOPEN_READ | APR_FOPEN_BINARY,
APR_OS_DEFAULT, p) == APR_SUCCESS) {
len = sizeof(format);
if (apr_file_read_full(fd, &format, len,
&len) == APR_SUCCESS) {
if (format == VARY_FORMAT_VERSION) {
apr_time_t expires;
len = sizeof(expires);
if (apr_file_read_full(fd, &expires, len,
&len) == APR_SUCCESS) {
apr_finfo_t finfo;
apr_file_close(fd);
if (apr_stat(&finfo, apr_pstrcat(p, nextpath,
CACHE_VDIR_SUFFIX, NULL), APR_FINFO_TYPE, p)
|| finfo.filetype != APR_DIR) {
delete_entry(path, d->basename, nodes, p);
}
else if (expires < current) {
delete_entry(path, d->basename, nodes, p);
}
break;
}
}
else if (format == DISK_FORMAT_VERSION) {
apr_off_t offset = 0;
apr_file_seek(fd, APR_SET, &offset);
len = sizeof(disk_cache_info_t);
if (apr_file_read_full(fd, &disk_info, len,
&len) == APR_SUCCESS) {
apr_file_close(fd);
e = apr_palloc(pool, sizeof(ENTRY));
APR_RING_INSERT_TAIL(&root.link, e, _entry, link);
e->expire = disk_info.expire;
e->response_time = disk_info.response_time;
e->htime = d->htime;
e->dtime = d->dtime;
e->hsize = d->hsize;
e->dsize = d->dsize;
e->basename = apr_pstrdup(pool, d->basename);
break;
}
else {
apr_file_close(fd);
}
}
else {
apr_file_close(fd);
delete_entry(path, d->basename, nodes, p);
break;
}
}
else {
apr_file_close(fd);
}
}
if (realclean || d->htime < current - deviation
|| d->htime > current + deviation) {
delete_entry(path, d->basename, nodes, p);
unsolicited += d->hsize;
}
break;
case DATA:
current = apr_time_now();
if (realclean || d->dtime < current - deviation
|| d->dtime > current + deviation) {
delete_entry(path, d->basename, nodes, p);
unsolicited += d->dsize;
}
break;
/* temp files may only be deleted in realclean mode which
* is asserted above if a tempfile is in the hash array
*/
case TEMP:
delete_file(path, d->basename, nodes, p);
unsolicited += d->dsize;
break;
}
}
if (interrupted) {
return 1;
}
apr_pool_destroy(p);
if (benice) {
apr_sleep(NICE_DELAY);
}
if (interrupted) {
return 1;
}
return 0;
}
/*
* purge cache entries
*/
static void purge(char *path, apr_pool_t *pool, apr_off_t max,
apr_off_t inodes, apr_off_t nodes, apr_off_t round)
{
ENTRY *e, *n, *oldest;
struct stats s;
s.sum = 0;
s.entries = 0;
s.dfuture = 0;
s.dexpired = 0;
s.dfresh = 0;
s.max = max;
s.nodes = nodes;
s.inodes = inodes;
s.ntotal = nodes;
for (e = APR_RING_FIRST(&root.link);
e != APR_RING_SENTINEL(&root.link, _entry, link);
e = APR_RING_NEXT(e, link)) {
s.sum += round_up((apr_size_t)e->hsize, round);
s.sum += round_up((apr_size_t)e->dsize, round);
s.entries++;
}
s.total = s.sum;
s.etotal = s.entries;