Reimplement FastCGI interface

Due to licensing restrictions that actually don't allow anybody to use
the libfcgi code without prior approval from Open Market, which is
impossible to obtain - we decided to reimplement this interface from
scratch.  The result is actually slightly faster, and more importantly,
clear of any copyright issues.

1 files changed, 908 insertions, 0 deletions

diff --git a/sapi/cgi/fastcgi.c b/sapi/cgi/fastcgi.c
new file mode 100644
index 0000000000..f2ba15982e
--- /dev/null
+++ b/sapi/cgi/fastcgi.c
@@ -0,0 +1,908 @@
+/*
+   +----------------------------------------------------------------------+
+   | PHP Version 5                                                        |
+   +----------------------------------------------------------------------+
+   | Copyright (c) 1997-2006 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.               |
+   +----------------------------------------------------------------------+
+   | Authors: Dmitry Stogov <dmitry@zend.com>                             |
+   +----------------------------------------------------------------------+
+*/
+
+/* $Id$ */
+
+#include "fastcgi.h"
+#include "php.h"
+
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <errno.h>
+
+#ifdef _WIN32
+
+#include <windows.h>
+
+	typedef unsigned int size_t;
+
+	struct sockaddr_un {
+		short   sun_family;
+		char    sun_path[MAXPATHLEN];
+	};
+
+	static HANDLE fcgi_accept_mutex = INVALID_HANDLE_VALUE;
+	static int is_impersonate = 0;
+
+#define FCGI_LOCK(fd) \
+	if (fcgi_accept_mutex != INVALID_HANDLE_VALUE) { \
+		DWORD ret; \
+		while ((ret = WaitForSingleObject(fcgi_accept_mutex, 1000)) == WAIT_TIMEOUT) { \
+			if (in_shutdown) return -1; \
+		} \
+		if (ret == WAIT_FAILED) { \
+			fprintf(stderr, "WaitForSingleObject() failed\n"); \
+			return -1; \
+		} \
+	}
+
+#define FCGI_UNLOCK(fd) \
+	if (fcgi_accept_mutex != INVALID_HANDLE_VALUE) { \
+		ReleaseMutex(fcgi_accept_mutex); \
+	}
+
+#else
+
+# include <sys/types.h>
+# include <sys/stat.h>
+# include <unistd.h>
+# include <fcntl.h>
+# include <sys/socket.h>
+# include <sys/un.h>
+# include <netinet/in.h>
+# include <arpa/inet.h>
+# include <netdb.h>
+# include <sys/signal.h>
+
+# ifndef HAVE_SOCKLEN_T
+	typedef unsigned int socklen_t;
+# endif
+
+# ifdef USE_LOCKING
+#  define FCGI_LOCK(fd)								\
+	do {											\
+		struct flock lock;							\
+		lock.l_type = F_WRLCK;						\
+		lock.l_start = 0;							\
+		lock.l_whence = SEEK_SET;					\
+		lock.l_len = 0;								\
+		if (fcntl(fd, F_SETLKW, &lock) != -1) {		\
+			break;									\
+		} else if (errno != EINTR || in_shutdown) {	\
+			return -1;								\
+		}											\
+	} while (1)
+
+#  define FCGI_UNLOCK(fd)							\
+	do {											\
+		int orig_errno = errno;						\
+		while (1) {									\
+			struct flock lock;						\
+			lock.l_type = F_UNLCK;					\
+			lock.l_start = 0;						\
+			lock.l_whence = SEEK_SET;				\
+			lock.l_len = 0;							\
+			if (fcntl(fd, F_SETLK, &lock) != -1) {	\
+				break;								\
+			} else if (errno != EINTR) {			\
+				return -1;							\
+			}										\
+		}											\
+		errno = orig_errno;							\
+	} while (0)
+# else
+#  define FCGI_LOCK(fd)
+#  define FCGI_UNLOCK(fd)
+# endif
+
+#endif
+
+typedef union _sa_t {
+	struct sockaddr     sa;
+	struct sockaddr_un  sa_unix;
+	struct sockaddr_in  sa_inet;
+} sa_t;
+
+typedef struct _fcgi_mgmt_rec {
+	char* name;
+	char  val;
+} fcgi_mgmt_rec;
+
+static const fcgi_mgmt_rec fcgi_mgmt_vars[] = {
+	{"FCGI_MAX_CONNS",  1},
+	{"FCGI_MAX_REQS",   1},
+	{"FCGI_MPXS_CONNS", 0}
+};
+
+
+static int is_initialized = 0;
+static int is_fastcgi = 0;
+static int in_shutdown = 0;
+
+static inline char* fcgi_strndup(const char *str, int len)
+{
+	char *s = malloc(len+1);
+	memcpy(s, str, len+1);
+	return s;
+}
+
+#ifdef _WIN32
+
+static DWORD WINAPI fcgi_shutdown_thread(LPVOID arg)
+{
+	HANDLE shutdown_event = (HANDLE) arg;
+	WaitForSingleObject(shutdown_event, INFINITE);
+	in_shutdown = 1;
+	return 0;
+}
+
+#else
+
+static void fcgi_signal_handler(int signo)
+{
+	if (signo == SIGUSR1) {
+		in_shutdown = 1;
+	}
+}
+
+#endif
+
+int fcgi_init(void)
+{
+	if (!is_initialized) {
+#ifdef _WIN32
+# if 0
+		/* TODO: Support for TCP sockets */
+		WSADATA wsaData;
+
+		if (WSAStartup(MAKEWORD(2,0), &wsaData)) {
+			fprintf(stderr, "Error starting Windows Sockets.  Error: %d", WSAGetLastError());
+			return 0;
+		}
+# endif
+		is_initialized = 1;
+
+		if ((GetStdHandle(STD_OUTPUT_HANDLE) == INVALID_HANDLE_VALUE) &&
+		    (GetStdHandle(STD_ERROR_HANDLE)  == INVALID_HANDLE_VALUE) &&
+		    (GetStdHandle(STD_INPUT_HANDLE)  != INVALID_HANDLE_VALUE)) {
+			char *str;
+			DWORD pipe_mode = PIPE_READMODE_BYTE | PIPE_WAIT;
+			HANDLE pipe = GetStdHandle(STD_INPUT_HANDLE);
+
+			SetNamedPipeHandleState(pipe, &pipe_mode, NULL, NULL);
+
+			str = getenv("_FCGI_SHUTDOWN_EVENT_");
+			if (str != NULL) {
+				HANDLE shutdown_event = (HANDLE) atoi(str);
+				if (!CreateThread(NULL, 0, fcgi_shutdown_thread,
+				                  shutdown_event, 0, NULL)) {
+					return -1;
+				}
+			}
+			str = getenv("_FCGI_MUTEX_");
+			if (str != NULL) {
+				fcgi_accept_mutex = (HANDLE) atoi(str);
+			}
+			return is_fastcgi = 1;
+		} else {
+			return is_fastcgi = 0;
+		}
+#else
+		sa_t sa;
+		socklen_t len = sizeof(sa);
+
+		is_initialized = 1;
+		errno = 0;
+		if (getpeername(0, (struct sockaddr *)&sa, &len) != 0 && errno == ENOTCONN) {
+			struct sigaction new_sa, old_sa;
+
+			sigemptyset(&new_sa.sa_mask);
+			new_sa.sa_flags = 0;
+			new_sa.sa_handler = fcgi_signal_handler;
+			sigaction(SIGUSR1, &new_sa, NULL);
+			sigaction(SIGPIPE, NULL, &old_sa);
+			if (old_sa.sa_handler == SIG_DFL) {
+				sigaction(SIGPIPE, &new_sa, NULL);
+			}
+
+			return is_fastcgi = 1;
+		} else {
+			return is_fastcgi = 0;
+		}
+#endif
+	}
+	return is_fastcgi;
+}
+
+
+int fcgi_is_fastcgi(void)
+{
+	if (!is_initialized) {
+		return fcgi_init();
+	} else {
+		return is_fastcgi;
+	}
+}
+
+int fcgi_listen(const char *path, int backlog)
+{
+#ifdef _WIN32
+	/* TODO: Support for manual binding on TCP sockets (php -b <port>) */
+	return -1;
+#else
+	char     *s;
+	int       tcp = 0;
+	char      host[MAXPATHLEN];
+	short     port = 0;
+	int       listen_socket;
+	sa_t      sa;
+	socklen_t sa_len;
+
+	if ((s = strchr(path, ':'))) {
+		port = atoi(s+1);
+		if (port != 0 && (s-path) < MAXPATHLEN) {
+			strncpy(host, path, s-path);
+			host[s-path] = '\0';
+			tcp = 1;
+		}
+	}
+
+	/* Prepare socket address */
+	if (tcp) {
+		memset(&sa.sa_inet, 0, sizeof(sa.sa_inet));
+		sa.sa_inet.sin_family = AF_INET;
+		sa.sa_inet.sin_port = htons(port);
+		sa_len = sizeof(sa.sa_inet);
+
+		if (!*host || !strncmp(host, "*", sizeof("*")-1)) {
+			sa.sa_inet.sin_addr.s_addr = htonl(INADDR_ANY);
+		} else {
+			sa.sa_inet.sin_addr.s_addr = inet_addr(host);
+			if (sa.sa_inet.sin_addr.s_addr == INADDR_NONE) {
+				struct hostent *hep;
+
+				hep = gethostbyname(host);
+				if (!hep || hep->h_addrtype != AF_INET || !hep->h_addr_list[0]) {
+					fprintf(stderr, "Cannot resolve host name '%s'!\n", host);
+					return -1;
+				} else if (hep->h_addr_list[1]) {
+					fprintf(stderr, "Host '%s' has multiple addresses. You must choose one explicitly!\n", host);
+					return -1;
+				}
+				sa.sa_inet.sin_addr.s_addr = ((struct in_addr*)hep->h_addr_list[0])->s_addr;
+			}
+		}
+	} else {
+		int path_len = strlen(path);
+
+		if (path_len >= sizeof(sa.sa_unix.sun_path)) {
+			fprintf(stderr, "Listening socket's path name is too long.\n");
+			return -1;
+		}
+
+		memset(&sa.sa_unix, 0, sizeof(sa.sa_unix));
+		sa.sa_unix.sun_family = AF_UNIX;
+		memcpy(sa.sa_unix.sun_path, path, path_len + 1);
+		sa_len = sizeof(sa.sa_unix.sun_family) + path_len;
+#ifdef HAVE_SOCKADDR_UN_SUN_LEN
+		sa_len += sizeof(sa.sa_unix.sun_len) + 1;
+		sa.sa_unix.sun_len = sa_len;
+#endif
+		unlink(path);
+	}
+
+	/* Create, bind socket and start listen on it */
+	if ((listen_socket = socket(sa.sa.sa_family, SOCK_STREAM, 0)) < 0 ||
+	    bind(listen_socket, (struct sockaddr *) &sa, sa_len) < 0 ||
+	    listen(listen_socket, backlog) < 0) {
+
+		fprintf(stderr, "Cannot bind/listen socket - [%d] %s.\n",errno, strerror(errno));
+		return -1;
+	}
+
+	if (!tcp) {
+		chmod(path, 0777);
+	}
+
+	if (!is_initialized) {
+		fcgi_init();
+	}
+	is_fastcgi = 1;
+	return listen_socket;
+#endif
+}
+
+void fcgi_init_request(fcgi_request *req, int listen_socket)
+{
+	memset(req, 0, sizeof(fcgi_request));
+	req->listen_socket = listen_socket;
+	req->fd = -1;
+	req->id = -1;
+
+	req->in_len = 0;
+	req->in_pad = 0;
+
+	req->out_hdr  = NULL;
+	req->out_pos  = req->out_buf;
+}
+
+static inline ssize_t safe_write(fcgi_request *req, const void *buf, size_t count)
+{
+	int    ret;
+	size_t n = 0;
+
+	do {
+		ret = write(req->fd, ((char*)buf)+n, count-n);
+		if (ret > 0) {
+			n += ret;
+		} else if (ret <= 0 && errno != 0 && errno != EINTR) {
+			return ret;
+		}
+	} while (n != count);
+	return n;
+}
+
+static inline ssize_t safe_read(fcgi_request *req, const void *buf, size_t count)
+{
+	int    ret;
+	size_t n = 0;
+
+	do {
+		ret = read(req->fd, ((char*)buf)+n, count-n);
+		if (ret > 0) {
+			n += ret;
+		} else if (ret == 0 && errno == 0) {
+			return n;
+		} else if (ret <= 0 && errno != 0 && errno != EINTR) {
+			return ret;
+		}
+	} while (n != count);
+	return n;
+}
+
+static inline int fcgi_make_header(fcgi_header *hdr, fcgi_request_type type, int req_id, int len)
+{
+	int pad = ((len + 7) & ~7) - len;
+
+	hdr->contentLengthB0 = (unsigned char)(len & 0xff);
+	hdr->contentLengthB1 = (unsigned char)((len >> 8) & 0xff);
+	hdr->paddingLength = (unsigned char)pad;
+	hdr->requestIdB0 = (unsigned char)(req_id & 0xff);
+	hdr->requestIdB1 = (unsigned char)((req_id >> 8) & 0xff);
+	hdr->reserved = 0;
+	hdr->type = type;
+	hdr->version = FCGI_VERSION_1;
+	return pad;
+}
+
+static int fcgi_get_params(fcgi_request *req, unsigned char *p, unsigned char *end, int n)
+{
+	int name_len, val_len;
+	char *s;
+
+	while (p < end) {
+		name_len = *p++;
+		if (name_len >= 128) {
+			name_len = ((name_len & 0x7f) << 24);
+			name_len |= (*p++ << 16);
+			name_len |= (*p++ << 8);
+			name_len |= *p++;
+		}
+		val_len = *p++;
+		if (val_len >= 128) {
+			val_len = ((val_len & 0x7f) << 24);
+			val_len |= (*p++ << 16);
+			val_len |= (*p++ << 8);
+			val_len |= *p++;
+		}
+		req->env[n] = s = malloc(name_len + val_len + 2);
+		memcpy(s, p, name_len);
+		p += name_len;
+		s[name_len] = '=';
+		memcpy(s+name_len+1, p, val_len);
+		p += val_len;
+		s[name_len+1+val_len] = '\0';
+		n++;
+		if (n > sizeof(req->env)/sizeof(req->env[0])) {
+			/* TODO: to many environment variables */
+			return n;
+		}
+	}
+	return n;
+}
+
+static int fcgi_read_request(fcgi_request *req)
+{
+	fcgi_header hdr;
+	int len, padding;
+	int n = 1;
+	char *s;
+	unsigned char buf[FCGI_MAX_LENGTH+8];
+
+	req->keep = 0;
+	req->in_len = 0;
+	req->out_hdr = NULL;
+	req->out_pos = req->out_buf;
+	memset(req->env, 0, sizeof(req->env));
+
+	if (safe_read(req, &hdr, sizeof(fcgi_header)) != sizeof(fcgi_header) ||
+	    hdr.version < FCGI_VERSION_1) {
+		return 0;
+	}
+
+	len = (hdr.contentLengthB1 << 8) | hdr.contentLengthB0;
+	padding = hdr.paddingLength;
+
+	while (hdr.type == FCGI_STDIN && len == 0) {
+		if (safe_read(req, &hdr, sizeof(fcgi_header)) != sizeof(fcgi_header) ||
+		    hdr.version < FCGI_VERSION_1) {
+			return 0;
+		}
+
+		len = (hdr.contentLengthB1 << 8) | hdr.contentLengthB0;
+		padding = hdr.paddingLength;
+	}
+
+	req->id = (hdr.requestIdB1 << 8) + hdr.requestIdB0;
+
+	if (hdr.type == FCGI_BEGIN_REQUEST && len == sizeof(fcgi_begin_request)) {
+		if (safe_read(req, buf, len+padding) != len+padding) {
+			return 0;
+		}
+
+		req->keep = (((fcgi_begin_request*)buf)->flags & FCGI_KEEP_CONN);
+		switch ((((fcgi_begin_request*)buf)->roleB1 << 8) + ((fcgi_begin_request*)buf)->roleB0) {
+			case FCGI_RESPONDER:
+				req->env[0] = fcgi_strndup("FCGI_ROLE=RESPONDER", sizeof("FCGI_ROLE=RESPONDER")-1);
+				break;
+			case FCGI_AUTHORIZER:
+				req->env[0] = fcgi_strndup("FCGI_ROLE=AUTHORIZER", sizeof("FCGI_ROLE=AUTHORIZER")-1);
+				break;
+			case FCGI_FILTER:
+				req->env[0] = fcgi_strndup("FCGI_ROLE=FILTER", sizeof("FCGI_ROLE=FILTER")-1);
+				break;
+			default:
+				return 0;
+		}
+
+		if (safe_read(req, &hdr, sizeof(fcgi_header)) != sizeof(fcgi_header) ||
+		    hdr.version < FCGI_VERSION_1) {
+			return 0;
+		}
+
+		len = (hdr.contentLengthB1 << 8) | hdr.contentLengthB0;
+		padding = hdr.paddingLength;
+
+		while (hdr.type == FCGI_PARAMS && len > 0) {
+			if (safe_read(req, buf, len+padding) != len+padding) {
+				req->keep = 0;
+				return 0;
+			}
+			n = fcgi_get_params(req, buf, buf+len, n);
+
+			if (safe_read(req, &hdr, sizeof(fcgi_header)) != sizeof(fcgi_header) ||
+			    hdr.version < FCGI_VERSION_1) {
+				req->keep = 0;
+				return 0;
+			}
+			len = (hdr.contentLengthB1 << 8) | hdr.contentLengthB0;
+			padding = hdr.paddingLength;
+		}
+	} else if (hdr.type == FCGI_GET_VALUES) {
+		int i, j;
+		int name_len;
+		unsigned char *p = buf + sizeof(fcgi_header);
+
+		if (safe_read(req, buf, len+padding) != len+padding) {
+			return 0;
+		}
+		n = fcgi_get_params(req, buf, buf+len, 0);
+		for (i = 0; i < n; i++) {
+			if ((s = strchr(req->env[i], '=')) != NULL) {
+				*s = '\0';
+				name_len = s - req->env[i];
+			} else {
+				name_len = strlen(req->env[i]);
+			}
+			for (j = 0; j < sizeof(fcgi_mgmt_vars)/sizeof(fcgi_mgmt_vars[0]); j++) {
+				if (strncmp(req->env[i], fcgi_mgmt_vars[j].name, name_len) == 0) {
+	                sprintf((char*)p, "%c%c%s%c", name_len, 1, fcgi_mgmt_vars[j].name, fcgi_mgmt_vars[j].val);
+	                p += name_len+3;
+				}
+			}
+		}
+		len = p - buf - sizeof(fcgi_header);
+		len += fcgi_make_header((fcgi_header*)buf, FCGI_GET_VALUES_RESULT, 0, len);
+		if (safe_write(req, buf, sizeof(fcgi_header)+len) != sizeof(fcgi_header)+len) {
+			return 0;
+		}
+		return 0;
+	} else {
+		return 0;
+	}
+
+	return 1;
+}
+
+int fcgi_read(fcgi_request *req, char *str, int len)
+{
+	int ret, n, rest;
+	fcgi_header hdr;
+	unsigned char buf[8];
+
+	n = 0;
+	rest = len;
+	while (rest > 0) {
+		if (req->in_len == 0) {
+			if (safe_read(req, &hdr, sizeof(fcgi_header)) != sizeof(fcgi_header) ||
+			    hdr.version < FCGI_VERSION_1 ||
+			    hdr.type != FCGI_STDIN) {
+				req->keep = 0;
+				return 0;
+			}
+			req->in_len = (hdr.contentLengthB1 << 8) | hdr.contentLengthB0;
+			req->in_pad = hdr.paddingLength;
+			if (req->in_len == 0) {
+				return n;
+			}
+		}
+
+		if (req->in_len >= rest) {
+			ret = safe_read(req, str, rest);
+		} else {
+			ret = safe_read(req, str, req->in_len);
+		}
+		if (ret < 0) {
+			req->keep = 0;
+			return ret;
+		} else if (ret > 0) {
+			req->in_len -= ret;
+			rest -= ret;
+			n += ret;
+			str += ret;
+			if (req->in_len == 0) {
+				if (req->in_pad) {
+					if (safe_read(req, buf, req->in_pad) != req->in_pad) {
+						req->keep = 0;
+						return ret;
+					}
+				}
+			} else {
+				return n;
+			}
+		} else {
+			return n;
+		}
+	}
+	return n;
+}
+
+static inline void fcgi_close(fcgi_request *req, int force, int destroy)
+{
+	if (destroy) {
+		char **env = req->env;
+		while (*env) {
+			free(*env++);
+		}
+	}
+	if ((force || !req->keep) && req->fd >= 0) {
+#ifdef _WIN32
+		HANDLE pipe = (HANDLE)_get_osfhandle(req->fd);
+
+		if (!force) {
+			FlushFileBuffers(pipe);
+		}
+		DisconnectNamedPipe(pipe);
+		if (is_impersonate) {
+			RevertToSelf();
+		}
+#else
+		close(req->fd);
+#endif
+		req->fd = -1;
+	}
+}
+
+int fcgi_accept_request(fcgi_request *req)
+{
+	fcgi_finish_request(req);
+
+	while (1) {
+		if (req->fd < 0) {
+			while (1) {
+#ifdef _WIN32
+				HANDLE pipe = (HANDLE)_get_osfhandle(req->listen_socket);
+				OVERLAPPED ov;
+
+				FCGI_LOCK(req->listen_socket);
+				ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
+				if (!ConnectNamedPipe(pipe, &ov)) {
+					errno = GetLastError();
+					if (errno == ERROR_IO_PENDING) {
+						while (WaitForSingleObject(ov.hEvent, 1000) == WAIT_TIMEOUT) {
+							if (in_shutdown) {
+								CloseHandle(ov.hEvent);
+								FCGI_UNLOCK(req->listen_socket);
+								return -1;
+							}
+						}
+					} else if (errno != ERROR_PIPE_CONNECTED) {
+					}
+				}
+				CloseHandle(ov.hEvent);
+				if (is_impersonate && !ImpersonateNamedPipeClient(pipe)) {
+					DisconnectNamedPipe(pipe);
+					req->fd = -1;
+				} else {
+					req->fd = req->listen_socket;
+				}
+				FCGI_UNLOCK(req->listen_socket);
+#else
+				sa_t sa;
+				socklen_t len = sizeof(sa);
+
+				FCGI_LOCK(req->listen_socket);
+				req->fd = accept(req->listen_socket, (struct sockaddr *)&sa, &len);
+				FCGI_UNLOCK(req->listen_socket);
+#endif
+
+				if (in_shutdown || (req->fd < 0 && errno != EINTR)) {
+					return -1;
+				}
+
+#ifdef _WIN32
+				break;
+#else
+				if (req->fd >= 0) {
+					struct timeval tv = {1,0};
+					fd_set set;
+
+					FD_ZERO(&set);
+					FD_SET(req->fd, &set);
+try_again:
+					errno = 0;
+					if (select(req->fd + 1, &set, NULL, NULL, &tv) >= 0 && FD_ISSET(req->fd, &set)) {
+						break;
+					}
+					if (errno == EINTR) goto try_again;
+					fcgi_close(req, 1, 0);
+				}
+#endif
+			}
+		}
+		if (fcgi_read_request(req)) {
+			return req->fd;
+		} else {
+			fcgi_close(req, 1, 1);
+		}
+	}
+}
+
+static inline fcgi_header* open_packet(fcgi_request *req, fcgi_request_type type)
+{
+	req->out_hdr = (fcgi_header*) req->out_pos;
+	req->out_hdr->type = type;
+	req->out_pos += sizeof(fcgi_header);
+	return req->out_hdr;
+}
+
+static inline void close_packet(fcgi_request *req)
+{
+	if (req->out_hdr) {
+		int len = req->out_pos - ((unsigned char*)req->out_hdr + sizeof(fcgi_header));
+
+		req->out_pos += fcgi_make_header(req->out_hdr, req->out_hdr->type, req->id, len);
+		req->out_hdr = NULL;
+	}
+}
+
+int fcgi_flush(fcgi_request *req, int close)
+{
+	int len;
+
+	close_packet(req);
+
+	len = req->out_pos - req->out_buf;
+
+	if (close) {
+		fcgi_end_request_rec *rec = (fcgi_end_request_rec*)(req->out_pos);
+
+		fcgi_make_header(&rec->hdr, FCGI_END_REQUEST, req->id, sizeof(fcgi_end_request));
+		rec->body.appStatusB3 = 0;
+		rec->body.appStatusB2 = 0;
+		rec->body.appStatusB1 = 0;
+		rec->body.appStatusB0 = 0;
+		rec->body.protocolStatus = FCGI_REQUEST_COMPLETE;
+		len += sizeof(fcgi_end_request_rec);
+	}
+
+	if (safe_write(req, req->out_buf, len) != len) {
+		req->keep = 0;
+		return 0;
+	}
+
+	req->out_pos = req->out_buf;
+	return 1;
+}
+
+int fcgi_write(fcgi_request *req, fcgi_request_type type, const char *str, int len)
+{
+	int limit, rest;
+
+	if (len <= 0) {
+		return 0;
+	}
+
+	if (req->out_hdr && req->out_hdr->type != type) {
+		close_packet(req);
+	}
+	rest = len;
+#if 0
+	/* Unoptinmzed, but clear version */
+	while (rest > 0) {
+		limit = sizeof(req->out_buf) - (req->out_pos - req->out_buf);
+
+		if (!req->out_hdr) {
+			if (limit < sizeof(fcgi_header)) {
+				fcgi_flush(req, 0);
+			}
+			open_packet(req, type);
+		}
+		limit = sizeof(req->out_buf) - (req->out_pos - req->out_buf);
+		if (rest < limit) {
+			memcpy(req->out_pos, str, rest);
+			req->out_pos += rest;
+			return len;
+		} else {
+			memcpy(req->out_pos, str, limit);
+			req->out_pos += limit;
+			rest -= limit;
+			str += limit;
+			fcgi_flush(req, 0);
+		}
+	}
+#else
+	/* Optinmzed version */
+	if (!req->out_hdr) {
+		rest += sizeof(fcgi_header);
+	}
+	limit = sizeof(req->out_buf) - (req->out_pos - req->out_buf);
+
+	if (rest < limit) {
+		if (!req->out_hdr) {
+			open_packet(req, type);
+		}
+		memcpy(req->out_pos, str, len);
+		req->out_pos += len;
+	} else if (rest - limit < sizeof(req->out_buf) - sizeof(fcgi_header)) {
+		if (!req->out_hdr) {
+			open_packet(req, type);
+		}
+		memcpy(req->out_pos, str, limit);
+		req->out_pos += limit;
+		fcgi_flush(req, 0);
+		open_packet(req, type);
+		memcpy(req->out_pos, str + limit, len - limit);
+		req->out_pos += len - limit;
+	} else {
+		int pad = ((len + 7) & ~7) - len;
+
+		rest = pad ? 8 - pad : 0;
+
+		close_packet(req);
+		open_packet(req, type);
+		fcgi_make_header(req->out_hdr, type, req->id, len - rest);
+		req->out_hdr = NULL;
+		fcgi_flush(req, 0);
+		if (safe_write(req, str, len - rest) != len - rest) {
+			req->keep = 0;
+			return -1;
+		}
+		if (pad) {
+			open_packet(req, type);
+			memcpy(req->out_pos, str + len - rest,  rest);
+			req->out_pos += rest;
+		}
+	}
+#endif
+	return len;
+}
+
+int fcgi_finish_request(fcgi_request *req)
+{
+	fcgi_flush(req, 1);
+	fcgi_close(req, 0, 1);
+	return 1;
+}
+
+char* fcgi_getenv_helper(char** env, const char *name, int len)
+{
+	if (name && env) {
+		while (*env) {
+			if ((strncmp(name, *env, len) == 0) && ((*env)[len] == '=')) {
+				return *env+len+1;
+			}
+			env++;
+		}
+	}
+	return NULL;
+}
+
+char* fcgi_getenv(fcgi_request *req, const char* var, int var_len)
+{
+	if (!req) return NULL;
+	return fcgi_getenv_helper(req->env, var, var_len);
+}
+
+void fcgi_putenv(fcgi_request *req, char* var, int var_len)
+{
+	if (var && req) {
+		char **env = req->env;
+		char *s = strchr(var, '=');
+		int len;
+
+		if (!s) return ;
+		len = s - var + 1;
+		while (*env) {
+			if ((strncmp(var, *env, len) == 0)) {
+				free(*env);
+				*env = fcgi_strndup(var, var_len);
+				return;
+			}
+			env++;
+		}
+		*env = fcgi_strndup(var, var_len);
+	}
+}
+
+int FCGX_FPrintF(FCGX_Stream stream, const char *format, ...)
+{
+    int result;
+    va_list args;
+    char buf[4096];
+
+    va_start(args, format);
+	result = vsnprintf(buf, sizeof(buf), format, args);
+    va_end(args);
+
+    fcgi_write(stream.req, stream.type, buf, result);
+    return result;
+}
+
+#ifdef _WIN32
+void OS_SetImpersonate(void)
+{
+	char *os_name;
+
+	os_name = getenv("OS");
+	if (os_name && stricmp(os_name, "Windows_NT") == 0) {
+		is_impersonate = 1;
+	}
+}
+#endif
+
+/*
+ * Local variables:
+ * tab-width: 4
+ * c-basic-offset: 4
+ * End:
+ * vim600: sw=4 ts=4 fdm=marker
+ * vim<600: sw=4 ts=4
+ */