mirror of
https://github.com/php/php-src.git
synced 2024-09-22 18:37:25 +00:00
ca59cb7cf9
I don't have time right now to leave in the good ones and remove only the bad ones. There are some semantical changes which I reject, because they aim at fixing a bug which is at a completely other location. Then SID does not gefined anymore properly. (This broken patch has not been sent to me at all.) Also, there were *so* many whitespace changes which already make these commits bogus.
353 lines
7.4 KiB
C
353 lines
7.4 KiB
C
/*
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+----------------------------------------------------------------------+
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| PHP Version 4 |
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+----------------------------------------------------------------------+
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| Copyright (c) 1997-2002 The PHP Group |
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+----------------------------------------------------------------------+
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| This source file is subject to version 2.02 of the PHP license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available at through the world-wide-web at |
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| http://www.php.net/license/2_02.txt. |
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| If you did not receive a copy of the PHP license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@php.net so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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| Author: Sascha Schumann <sascha@schumann.cx> |
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+----------------------------------------------------------------------+
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*/
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/* $Id$ */
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#include "php.h"
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#include <sys/stat.h>
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#include <sys/types.h>
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#if HAVE_SYS_FILE_H
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#include <sys/file.h>
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#endif
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#if HAVE_DIRENT_H
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#include <dirent.h>
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#endif
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#ifdef PHP_WIN32
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#include "win32/readdir.h"
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#endif
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#include <time.h>
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#include <fcntl.h>
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#include <errno.h>
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#include "php_session.h"
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#include "mod_files.h"
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#include "ext/standard/flock_compat.h"
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#define FILE_PREFIX "sess_"
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typedef struct {
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int fd;
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char *lastkey;
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char *basedir;
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size_t basedir_len;
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size_t dirdepth;
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size_t st_size;
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} ps_files;
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ps_module ps_mod_files = {
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PS_MOD(files)
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};
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static int ps_files_valid_key(const char *key)
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{
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size_t len;
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const char *p;
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char c;
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int ret = 1;
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for (p = key; (c = *p); p++) {
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/* valid characters are a..z,A..Z,0..9 */
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if (!((c >= 'a' && c <= 'z') ||
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(c >= 'A' && c <= 'Z') ||
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(c >= '0' && c <= '9'))) {
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ret = 0;
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break;
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}
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}
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len = p - key;
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if (len == 0)
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ret = 0;
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return ret;
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}
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static char *ps_files_path_create(char *buf, size_t buflen, ps_files *data, const char *key)
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{
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size_t key_len;
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const char *p;
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int i;
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int n;
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key_len = strlen(key);
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if (key_len <= data->dirdepth || buflen <
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(strlen(data->basedir) + 2 * data->dirdepth + key_len + 5 + sizeof(FILE_PREFIX)))
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return NULL;
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p = key;
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memcpy(buf, data->basedir, data->basedir_len);
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n = data->basedir_len;
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buf[n++] = PHP_DIR_SEPARATOR;
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for (i = 0; i < (int)data->dirdepth; i++) {
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buf[n++] = *p++;
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buf[n++] = PHP_DIR_SEPARATOR;
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}
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memcpy(buf + n, FILE_PREFIX, sizeof(FILE_PREFIX) - 1);
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n += sizeof(FILE_PREFIX) - 1;
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memcpy(buf + n, key, key_len);
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n += key_len;
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buf[n] = '\0';
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return buf;
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}
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#ifndef O_BINARY
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#define O_BINARY 0
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#endif
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static void ps_files_close(ps_files *data)
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{
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if (data->fd != -1) {
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close(data->fd);
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data->fd = -1;
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}
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}
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static void ps_files_open(ps_files *data, const char *key)
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{
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char buf[MAXPATHLEN];
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TSRMLS_FETCH();
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if (data->fd < 0 || !data->lastkey || strcmp(key, data->lastkey)) {
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if (data->lastkey) {
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efree(data->lastkey);
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data->lastkey = NULL;
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}
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ps_files_close(data);
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if (!ps_files_valid_key(key) ||
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!ps_files_path_create(buf, sizeof(buf), data, key))
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return;
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data->lastkey = estrdup(key);
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#ifdef O_EXCL
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data->fd = VCWD_OPEN(buf, O_RDWR | O_BINARY);
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if (data->fd == -1 && errno == ENOENT)
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data->fd = VCWD_OPEN_MODE(buf, O_EXCL | O_RDWR | O_CREAT | O_BINARY, 0600);
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#else
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data->fd = VCWD_OPEN_MODE(buf, O_CREAT | O_RDWR | O_BINARY, 0600);
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#endif
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if (data->fd != -1)
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flock(data->fd, LOCK_EX);
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if (data->fd == -1)
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php_error(E_WARNING, "open(%s, O_RDWR) failed: %s (%d)", buf,
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strerror(errno), errno);
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}
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}
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static int ps_files_cleanup_dir(const char *dirname, int maxlifetime)
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{
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DIR *dir;
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char dentry[sizeof(struct dirent) + MAXPATHLEN];
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struct dirent *entry = (struct dirent *) &dentry;
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struct stat sbuf;
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char buf[MAXPATHLEN];
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time_t now;
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int nrdels = 0;
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size_t dirname_len;
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TSRMLS_FETCH();
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dir = opendir(dirname);
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if (!dir) {
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php_error(E_NOTICE, "ps_files_cleanup_dir: opendir(%s) failed: %s (%d)\n", dirname, strerror(errno), errno);
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return (0);
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}
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time(&now);
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dirname_len = strlen(dirname);
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/* Prepare buffer (dirname never changes) */
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memcpy(buf, dirname, dirname_len);
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buf[dirname_len] = PHP_DIR_SEPARATOR;
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while (php_readdir_r(dir, (struct dirent *) dentry, &entry) == 0 && entry) {
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/* does the file start with our prefix? */
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if (!strncmp(entry->d_name, FILE_PREFIX, sizeof(FILE_PREFIX) - 1)) {
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size_t entry_len;
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entry_len = strlen(entry->d_name);
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/* does it fit into our buffer? */
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if (entry_len + dirname_len + 2 < MAXPATHLEN) {
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/* create the full path.. */
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memcpy(buf + dirname_len + 1, entry->d_name, entry_len);
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/* NUL terminate it and */
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buf[dirname_len + entry_len + 1] = '\0';
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/* check whether its last access was more than maxlifet ago */
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if (VCWD_STAT(buf, &sbuf) == 0 &&
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(now - sbuf.st_atime) > maxlifetime) {
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VCWD_UNLINK(buf);
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nrdels++;
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}
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}
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}
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}
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closedir(dir);
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return (nrdels);
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}
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#define PS_FILES_DATA ps_files *data = PS_GET_MOD_DATA()
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PS_OPEN_FUNC(files)
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{
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ps_files *data;
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char *p;
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data = ecalloc(sizeof(*data), 1);
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PS_SET_MOD_DATA(data);
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data->fd = -1;
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if ((p = strchr(save_path, ';'))) {
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data->dirdepth = (size_t) strtol(save_path, NULL, 10);
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save_path = p + 1;
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}
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data->basedir_len = strlen(save_path);
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data->basedir = estrndup(save_path, data->basedir_len);
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return SUCCESS;
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}
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PS_CLOSE_FUNC(files)
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{
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PS_FILES_DATA;
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ps_files_close(data);
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if (data->lastkey)
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efree(data->lastkey);
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efree(data->basedir);
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efree(data);
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*mod_data = NULL;
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return SUCCESS;
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}
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PS_READ_FUNC(files)
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{
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long n;
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struct stat sbuf;
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PS_FILES_DATA;
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ps_files_open(data, key);
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if (data->fd < 0)
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return FAILURE;
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if (fstat(data->fd, &sbuf))
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return FAILURE;
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data->st_size = *vallen = sbuf.st_size;
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*val = emalloc(sbuf.st_size);
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#ifdef HAVE_PREAD
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n = pread(data->fd, *val, sbuf.st_size, 0);
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#else
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lseek(data->fd, 0, SEEK_SET);
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n = read(data->fd, *val, sbuf.st_size);
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#endif
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if (n != sbuf.st_size) {
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efree(*val);
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return FAILURE;
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}
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return SUCCESS;
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}
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PS_WRITE_FUNC(files)
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{
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long n;
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PS_FILES_DATA;
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ps_files_open(data, key);
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if (data->fd < 0)
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return FAILURE;
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/*
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* truncate file, if the amount of new data is smaller than
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* the existing data set.
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*/
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if (vallen < (int)data->st_size)
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ftruncate(data->fd, 0);
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#ifdef HAVE_PWRITE
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n = pwrite(data->fd, val, vallen, 0);
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#else
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lseek(data->fd, 0, SEEK_SET);
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n = write(data->fd, val, vallen);
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#endif
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if (n != vallen) {
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php_error(E_WARNING, "write failed: %s (%d)", strerror(errno), errno);
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return FAILURE;
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}
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return SUCCESS;
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}
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PS_DESTROY_FUNC(files)
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{
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char buf[MAXPATHLEN];
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PS_FILES_DATA;
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TSRMLS_FETCH();
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if (!ps_files_path_create(buf, sizeof(buf), data, key))
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return FAILURE;
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ps_files_close(data);
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if (VCWD_UNLINK(buf) == -1) {
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return FAILURE;
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}
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return SUCCESS;
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}
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PS_GC_FUNC(files)
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{
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PS_FILES_DATA;
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/* we don't perform any cleanup, if dirdepth is larger than 0.
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we return SUCCESS, since all cleanup should be handled by
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an external entity (i.e. find -ctime x | xargs rm) */
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if (data->dirdepth == 0)
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*nrdels = ps_files_cleanup_dir(data->basedir, maxlifetime);
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return SUCCESS;
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}
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/*
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* Local variables:
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* tab-width: 4
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* c-basic-offset: 4
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* End:
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* vim600: sw=4 ts=4 fdm=marker
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* vim<600: sw=4 ts=4
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*/
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