Imported from /home/lorry/working-area/delta_php2/php-5.4.13.tar.bz2.HEADphp-5.4.13master

1 files changed, 464 insertions, 0 deletions

diff --git a/ext/session/mod_files.c b/ext/session/mod_files.c
new file mode 100644
index 0000000..1665ba5
--- /dev/null
+++ b/ext/session/mod_files.c
@@ -0,0 +1,464 @@
+/*
+   +----------------------------------------------------------------------+
+   | PHP Version 5                                                        |
+   +----------------------------------------------------------------------+
+   | Copyright (c) 1997-2013 The PHP Group                                |
+   +----------------------------------------------------------------------+
+   | This source file is subject to version 3.01 of the PHP license,      |
+   | that is bundled with this package in the file LICENSE, and is        |
+   | available through the world-wide-web at the following url:           |
+   | http://www.php.net/license/3_01.txt                                  |
+   | If you did not receive a copy of the PHP license and are unable to   |
+   | obtain it through the world-wide-web, please send a note to          |
+   | license@php.net so we can mail you a copy immediately.               |
+   +----------------------------------------------------------------------+
+   | Author: Sascha Schumann <sascha@schumann.cx>                         |
+   +----------------------------------------------------------------------+
+ */
+
+/* $Id$ */
+
+#include "php.h"
+
+#include <sys/stat.h>
+#include <sys/types.h>
+
+#if HAVE_SYS_FILE_H
+#include <sys/file.h>
+#endif
+
+#if HAVE_DIRENT_H
+#include <dirent.h>
+#endif
+
+#ifdef PHP_WIN32
+#include "win32/readdir.h"
+#endif
+#include <time.h>
+
+#include <fcntl.h>
+#include <errno.h>
+
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#include "php_session.h"
+#include "mod_files.h"
+#include "ext/standard/flock_compat.h"
+#include "php_open_temporary_file.h"
+
+#define FILE_PREFIX "sess_"
+
+typedef struct {
+	int fd;
+	char *lastkey;
+	char *basedir;
+	size_t basedir_len;
+	size_t dirdepth;
+	size_t st_size;
+	int filemode;
+} ps_files;
+
+ps_module ps_mod_files = {
+	PS_MOD(files)
+};
+
+/* If you change the logic here, please also update the error message in
+ * ps_files_open() appropriately */
+static int ps_files_valid_key(const char *key)
+{
+	size_t len;
+	const char *p;
+	char c;
+	int ret = 1;
+
+	for (p = key; (c = *p); p++) {
+		/* valid characters are a..z,A..Z,0..9 */
+		if (!((c >= 'a' && c <= 'z')
+				|| (c >= 'A' && c <= 'Z')
+				|| (c >= '0' && c <= '9')
+				|| c == ','
+				|| c == '-')) {
+			ret = 0;
+			break;
+		}
+	}
+
+	len = p - key;
+
+	/* Somewhat arbitrary length limit here, but should be way more than
+	   anyone needs and avoids file-level warnings later on if we exceed MAX_PATH */
+	if (len == 0 || len > 128) {
+		ret = 0;
+	}
+
+	return ret;
+}
+
+static char *ps_files_path_create(char *buf, size_t buflen, ps_files *data, const char *key)
+{
+	size_t key_len;
+	const char *p;
+	int i;
+	int n;
+
+	key_len = strlen(key);
+	if (key_len <= data->dirdepth ||
+		buflen < (strlen(data->basedir) + 2 * data->dirdepth + key_len + 5 + sizeof(FILE_PREFIX))) {
+		return NULL;
+	}
+
+	p = key;
+	memcpy(buf, data->basedir, data->basedir_len);
+	n = data->basedir_len;
+	buf[n++] = PHP_DIR_SEPARATOR;
+	for (i = 0; i < (int)data->dirdepth; i++) {
+		buf[n++] = *p++;
+		buf[n++] = PHP_DIR_SEPARATOR;
+	}
+	memcpy(buf + n, FILE_PREFIX, sizeof(FILE_PREFIX) - 1);
+	n += sizeof(FILE_PREFIX) - 1;
+	memcpy(buf + n, key, key_len);
+	n += key_len;
+	buf[n] = '\0';
+
+	return buf;
+}
+
+#ifndef O_BINARY
+# define O_BINARY 0
+#endif
+
+static void ps_files_close(ps_files *data)
+{
+	if (data->fd != -1) {
+#ifdef PHP_WIN32
+		/* On Win32 locked files that are closed without being explicitly unlocked
+		   will be unlocked only when "system resources become available". */
+		flock(data->fd, LOCK_UN);
+#endif
+		close(data->fd);
+		data->fd = -1;
+	}
+}
+
+static void ps_files_open(ps_files *data, const char *key TSRMLS_DC)
+{
+	char buf[MAXPATHLEN];
+
+	if (data->fd < 0 || !data->lastkey || strcmp(key, data->lastkey)) {
+		if (data->lastkey) {
+			efree(data->lastkey);
+			data->lastkey = NULL;
+		}
+
+		ps_files_close(data);
+
+		if (!ps_files_valid_key(key)) {
+			php_error_docref(NULL TSRMLS_CC, E_WARNING, "The session id is too long or contains illegal characters, valid characters are a-z, A-Z, 0-9 and '-,'");
+			PS(invalid_session_id) = 1;
+			return;
+		}
+		if (!ps_files_path_create(buf, sizeof(buf), data, key)) {
+			return;
+		}
+
+		data->lastkey = estrdup(key);
+
+		data->fd = VCWD_OPEN_MODE(buf, O_CREAT | O_RDWR | O_BINARY, data->filemode);
+
+		if (data->fd != -1) {
+#ifndef PHP_WIN32
+			/* check to make sure that the opened file is not a symlink, linking to data outside of allowable dirs */
+			if (PG(open_basedir)) {
+				struct stat sbuf;
+
+				if (fstat(data->fd, &sbuf)) {
+					close(data->fd);
+					return;
+				}
+				if (S_ISLNK(sbuf.st_mode) && php_check_open_basedir(buf TSRMLS_CC)) {
+					close(data->fd);
+					return;
+				}
+			}
+#endif
+			flock(data->fd, LOCK_EX);
+
+#ifdef F_SETFD
+# ifndef FD_CLOEXEC
+#  define FD_CLOEXEC 1
+# endif
+			if (fcntl(data->fd, F_SETFD, FD_CLOEXEC)) {
+				php_error_docref(NULL TSRMLS_CC, E_WARNING, "fcntl(%d, F_SETFD, FD_CLOEXEC) failed: %s (%d)", data->fd, strerror(errno), errno);
+			}
+#endif
+		} else {
+			php_error_docref(NULL TSRMLS_CC, E_WARNING, "open(%s, O_RDWR) failed: %s (%d)", buf, strerror(errno), errno);
+		}
+	}
+}
+
+static int ps_files_cleanup_dir(const char *dirname, int maxlifetime TSRMLS_DC)
+{
+	DIR *dir;
+	char dentry[sizeof(struct dirent) + MAXPATHLEN];
+	struct dirent *entry = (struct dirent *) &dentry;
+	struct stat sbuf;
+	char buf[MAXPATHLEN];
+	time_t now;
+	int nrdels = 0;
+	size_t dirname_len;
+
+	dir = opendir(dirname);
+	if (!dir) {
+		php_error_docref(NULL TSRMLS_CC, E_NOTICE, "ps_files_cleanup_dir: opendir(%s) failed: %s (%d)", dirname, strerror(errno), errno);
+		return (0);
+	}
+
+	time(&now);
+
+	dirname_len = strlen(dirname);
+
+	/* Prepare buffer (dirname never changes) */
+	memcpy(buf, dirname, dirname_len);
+	buf[dirname_len] = PHP_DIR_SEPARATOR;
+
+	while (php_readdir_r(dir, (struct dirent *) dentry, &entry) == 0 && entry) {
+		/* does the file start with our prefix? */
+		if (!strncmp(entry->d_name, FILE_PREFIX, sizeof(FILE_PREFIX) - 1)) {
+			size_t entry_len = strlen(entry->d_name);
+
+			/* does it fit into our buffer? */
+			if (entry_len + dirname_len + 2 < MAXPATHLEN) {
+				/* create the full path.. */
+				memcpy(buf + dirname_len + 1, entry->d_name, entry_len);
+
+				/* NUL terminate it and */
+				buf[dirname_len + entry_len + 1] = '\0';
+
+				/* check whether its last access was more than maxlifet ago */
+				if (VCWD_STAT(buf, &sbuf) == 0 &&
+						(now - sbuf.st_mtime) > maxlifetime) {
+					VCWD_UNLINK(buf);
+					nrdels++;
+				}
+			}
+		}
+	}
+
+	closedir(dir);
+
+	return (nrdels);
+}
+
+#define PS_FILES_DATA ps_files *data = PS_GET_MOD_DATA()
+
+PS_OPEN_FUNC(files)
+{
+	ps_files *data;
+	const char *p, *last;
+	const char *argv[3];
+	int argc = 0;
+	size_t dirdepth = 0;
+	int filemode = 0600;
+
+	if (*save_path == '\0') {
+		/* if save path is an empty string, determine the temporary dir */
+		save_path = php_get_temporary_directory();
+
+		if (php_check_open_basedir(save_path TSRMLS_CC)) {
+			return FAILURE;
+		}
+	}
+
+	/* split up input parameter */
+	last = save_path;
+	p = strchr(save_path, ';');
+	while (p) {
+		argv[argc++] = last;
+		last = ++p;
+		p = strchr(p, ';');
+		if (argc > 1) break;
+	}
+	argv[argc++] = last;
+
+	if (argc > 1) {
+		errno = 0;
+		dirdepth = (size_t) strtol(argv[0], NULL, 10);
+		if (errno == ERANGE) {
+			php_error(E_WARNING, "The first parameter in session.save_path is invalid");
+			return FAILURE;
+		}
+	}
+
+	if (argc > 2) {
+		errno = 0;
+		filemode = strtol(argv[1], NULL, 8);
+		if (errno == ERANGE || filemode < 0 || filemode > 07777) {
+			php_error(E_WARNING, "The second parameter in session.save_path is invalid");
+			return FAILURE;
+		}
+	}
+	save_path = argv[argc - 1];
+
+	data = ecalloc(1, sizeof(*data));
+
+	data->fd = -1;
+	data->dirdepth = dirdepth;
+	data->filemode = filemode;
+	data->basedir_len = strlen(save_path);
+	data->basedir = estrndup(save_path, data->basedir_len);
+
+	if (PS_GET_MOD_DATA()) {
+		ps_close_files(mod_data TSRMLS_CC);
+	}
+	PS_SET_MOD_DATA(data);
+
+	return SUCCESS;
+}
+
+PS_CLOSE_FUNC(files)
+{
+	PS_FILES_DATA;
+
+	ps_files_close(data);
+
+	if (data->lastkey) {
+		efree(data->lastkey);
+	}
+
+	efree(data->basedir);
+	efree(data);
+	*mod_data = NULL;
+
+	return SUCCESS;
+}
+
+PS_READ_FUNC(files)
+{
+	long n;
+	struct stat sbuf;
+	PS_FILES_DATA;
+
+	ps_files_open(data, key TSRMLS_CC);
+	if (data->fd < 0) {
+		return FAILURE;
+	}
+
+	if (fstat(data->fd, &sbuf)) {
+		return FAILURE;
+	}
+
+	data->st_size = *vallen = sbuf.st_size;
+
+	if (sbuf.st_size == 0) {
+		*val = STR_EMPTY_ALLOC();
+		return SUCCESS;
+	}
+
+	*val = emalloc(sbuf.st_size);
+
+#if defined(HAVE_PREAD)
+	n = pread(data->fd, *val, sbuf.st_size, 0);
+#else
+	lseek(data->fd, 0, SEEK_SET);
+	n = read(data->fd, *val, sbuf.st_size);
+#endif
+
+	if (n != sbuf.st_size) {
+		if (n == -1) {
+			php_error_docref(NULL TSRMLS_CC, E_WARNING, "read failed: %s (%d)", strerror(errno), errno);
+		} else {
+			php_error_docref(NULL TSRMLS_CC, E_WARNING, "read returned less bytes than requested");
+		}
+		efree(*val);
+		return FAILURE;
+	}
+
+	return SUCCESS;
+}
+
+PS_WRITE_FUNC(files)
+{
+	long n;
+	PS_FILES_DATA;
+
+	ps_files_open(data, key TSRMLS_CC);
+	if (data->fd < 0) {
+		return FAILURE;
+	}
+
+	/* Truncate file if the amount of new data is smaller than the existing data set. */
+
+	if (vallen < (int)data->st_size) {
+		php_ignore_value(ftruncate(data->fd, 0));
+	}
+
+#if defined(HAVE_PWRITE)
+	n = pwrite(data->fd, val, vallen, 0);
+#else
+	lseek(data->fd, 0, SEEK_SET);
+	n = write(data->fd, val, vallen);
+#endif
+
+	if (n != vallen) {
+		if (n == -1) {
+			php_error_docref(NULL TSRMLS_CC, E_WARNING, "write failed: %s (%d)", strerror(errno), errno);
+		} else {
+			php_error_docref(NULL TSRMLS_CC, E_WARNING, "write wrote less bytes than requested");
+		}
+		return FAILURE;
+	}
+
+	return SUCCESS;
+}
+
+PS_DESTROY_FUNC(files)
+{
+	char buf[MAXPATHLEN];
+	PS_FILES_DATA;
+
+	if (!ps_files_path_create(buf, sizeof(buf), data, key)) {
+		return FAILURE;
+	}
+
+	if (data->fd != -1) {
+		ps_files_close(data);
+
+		if (VCWD_UNLINK(buf) == -1) {
+			/* This is a little safety check for instances when we are dealing with a regenerated session
+			 * that was not yet written to disk. */
+			if (!VCWD_ACCESS(buf, F_OK)) {
+				return FAILURE;
+			}
+		}
+	}
+
+	return SUCCESS;
+}
+
+PS_GC_FUNC(files)
+{
+	PS_FILES_DATA;
+
+	/* we don't perform any cleanup, if dirdepth is larger than 0.
+	   we return SUCCESS, since all cleanup should be handled by
+	   an external entity (i.e. find -ctime x | xargs rm) */
+
+	if (data->dirdepth == 0) {
+		*nrdels = ps_files_cleanup_dir(data->basedir, maxlifetime TSRMLS_CC);
+	}
+
+	return SUCCESS;
+}
+
+/*
+ * Local variables:
+ * tab-width: 4
+ * c-basic-offset: 4
+ * End:
+ * vim600: sw=4 ts=4 fdm=marker
+ * vim<600: sw=4 ts=4
+ */