Lighttpd

#include <sys/types.h>

#include <sys/time.h>

#include <sys/stat.h>

#include <stdlib.h>

#include <string.h>

#include <errno.h>

#include <stdio.h>

#include <unistd.h>

#include <fcntl.h>

#include <getopt.h>

#include <ws2tcpip.h>

#define FCGI_LISTENSOCK_FILENO 0

#define UNIX_PATH_LEN 108

typedef unsigned short int sa_family_t;

struct sockaddr_un {

	sa_family_t	sun_family;              /* address family AF_LOCAL/AF_UNIX */

	char		sun_path[UNIX_PATH_LEN]; /* 108 bytes of socket address     */

};

/* Evaluates the actual length of `sockaddr_un' structure. */

#define SUN_LEN(p) ((size_t)(((struct sockaddr_un *) NULL)->sun_path) \

				   + strlen ((p)->sun_path))

int fcgi_spawn_connection(char *appPath, char **appArgv, char *addr, unsigned short port, const char *unixsocket, int fork_count, int child_count, int pid_fd, int nofork) {

	SOCKET fcgi_fd;

	int socket_type, rc = 0;

	struct sockaddr_un fcgi_addr_un;

	struct sockaddr_in fcgi_addr_in;

	struct sockaddr *fcgi_addr;

	socklen_t servlen;

    WORD  wVersion;

    WSADATA wsaData;

    if (child_count < 2) {

		child_count = 5;

	}

	if (child_count > 256) {

		child_count = 256;

	}

	if (unixsocket) {

		memset(&fcgi_addr, 0, sizeof(fcgi_addr));

		fcgi_addr_un.sun_family = AF_UNIX;

		strcpy(fcgi_addr_un.sun_path, unixsocket);

#ifdef SUN_LEN

		servlen = SUN_LEN(&fcgi_addr_un);

#else

		/* stevens says: */

		servlen = strlen(fcgi_addr_un.sun_path) + sizeof(fcgi_addr_un.sun_family);

#endif

		socket_type = AF_UNIX;

		fcgi_addr = (struct sockaddr *) &fcgi_addr_un;

	} else {

		fcgi_addr_in.sin_family = AF_INET;

                if (addr != NULL) {

                        fcgi_addr_in.sin_addr.s_addr = inet_addr(addr);

                } else {

                        fcgi_addr_in.sin_addr.s_addr = htonl(INADDR_ANY);

                }

		fcgi_addr_in.sin_port = htons(port);

		servlen = sizeof(fcgi_addr_in);

		socket_type = AF_INET;

		fcgi_addr = (struct sockaddr *) &fcgi_addr_in;

	}

    /*

     * Initialize windows sockets library.

     */

    wVersion = MAKEWORD(2,0);

    if (WSAStartup( wVersion, &wsaData )) {

		fprintf(stderr, "%s.%d: error %d starting Windows sockets\n",

			__FILE__, __LINE__, WSAGetLastError());

    }

	if (-1 == (fcgi_fd = socket(socket_type, SOCK_STREAM, 0))) {

		fprintf(stderr, "%s.%d\n",

			__FILE__, __LINE__);

		return -1;

	}

	if (-1 == connect(fcgi_fd, fcgi_addr, servlen)) {

		/* server is not up, spawn in  */

		int val;

		if (unixsocket) unlink(unixsocket);

		close(fcgi_fd);

		/* reopen socket */

		if (-1 == (fcgi_fd = socket(socket_type, SOCK_STREAM, 0))) {

			fprintf(stderr, "%s.%d\n",

				__FILE__, __LINE__);

			return -1;

		}

		val = 1;

		if (setsockopt(fcgi_fd, SOL_SOCKET, SO_REUSEADDR, 	(const char*)&val, sizeof(val)) < 0) {

			fprintf(stderr, "%s.%d\n",

				__FILE__, __LINE__);

			return -1;

		}

		/* create socket */

		if (-1 == bind(fcgi_fd, fcgi_addr, servlen)) {

			fprintf(stderr, "%s.%d: bind failed: %s\n",

				__FILE__, __LINE__,

				strerror(errno));

			return -1;

		}

		if (-1 == listen(fcgi_fd, 1024)) {

			fprintf(stderr, "%s.%d: fd = -1\n",

				__FILE__, __LINE__);

			return -1;

		}

		while (fork_count-- > 0) {

			PROCESS_INFORMATION pi;

			STARTUPINFO si;

			ZeroMemory(&si,sizeof(STARTUPINFO));

			si.cb = sizeof(STARTUPINFO);

			si.dwFlags = STARTF_USESTDHANDLES;

			si.hStdOutput = INVALID_HANDLE_VALUE;

			si.hStdInput  = (HANDLE)fcgi_fd;

			si.hStdError  = INVALID_HANDLE_VALUE;

			if (!CreateProcess(NULL,appPath,NULL,NULL,TRUE,	CREATE_NO_WINDOW,NULL,NULL,&si,&pi)) {

				fprintf(stderr, "%s.%d: CreateProcess failed\n",

					__FILE__, __LINE__);

				return -1;

			} else {

				fprintf(stdout, "%s.%d: child spawned successfully: PID: %lu\n",

					__FILE__, __LINE__,

					pi.dwProcessId);

				CloseHandle(pi.hThread);

			}

		}

	} else {

		fprintf(stderr, "%s.%d: socket is already used, can't spawn\n",

			__FILE__, __LINE__);

		return -1;

	}

	closesocket(fcgi_fd);

	return rc;

}

void show_version () {

	char *b = "spawn-fcgi-win32 - spawns fastcgi processes\n";

	write(1, b, strlen(b));

}

void show_help () {

	char *b =

"Usage: spawn-fcgi [options] -- <fcgiapp> [fcgi app arguments]\n"

"\n"

"spawn-fcgi-win32 - spawns fastcgi processes\n"

"\n"

"Options:\n"

" -f <fcgiapp> filename of the fcgi-application\n"

" -a <addr>    bind to ip address\n"

" -p <port>    bind to tcp-port\n"

" -s <path>    bind to unix-domain socket\n"

" -C <childs>  (PHP only) numbers of childs to spawn (default 5)\n"

" -F <childs>  numbers of childs to fork (default 1)\n"

" -P <path>    name of PID-file for spawed process\n"

" -n           no fork (for daemontools)\n"

" -v           show version\n"

" -h           show this help\n"

"(root only)\n"

" -c <dir>     chroot to directory\n"

" -u <user>    change to user-id\n"

" -g <group>   change to group-id\n"

;

	write(1, b, strlen(b));

}

int main(int argc, char **argv) {

	char *fcgi_app = NULL, *unixsocket = NULL, *pid_file = NULL,

                *addr = NULL;

	char **fcgi_app_argv = { NULL };

	unsigned short port = 0;

	int child_count = 5;

	int fork_count = 1;

	int pid_fd = -1;

	int nofork = 0;

	int o;

	struct sockaddr_un un;

	while (-1 != (o = getopt(argc, argv, "c:f:g:hna:p:u:vC:F:s:P:"))) {

		switch(o) {

		case 'f': fcgi_app = optarg; break;

		case 'a': addr = optarg;/* ip addr */ break;

		case 'p': port = strtol(optarg, NULL, 10);/* port */ break;

		case 'C': child_count = strtol(optarg, NULL, 10);/*  */ break;

		case 'F': fork_count = strtol(optarg, NULL, 10);/*  */ break;

		case 's': unixsocket = optarg; /* unix-domain socket */ break;

		case 'n': nofork = 1; break;

		case 'P': pid_file = optarg; /* PID file */ break;

		case 'v': show_version(); return 0;

		case 'h': show_help(); return 0;

		default:

			show_help();

			return -1;

		}

	}

	if (optind < argc) {

		fcgi_app_argv = &argv[optind];

	}

	if ((fcgi_app == NULL && fcgi_app_argv == NULL) || (port == 0 && unixsocket == NULL)) {

		show_help();

		return -1;

	}

	if (unixsocket && port) {

		fprintf(stderr, "%s.%d: %s\n",

			__FILE__, __LINE__,

			"either a unix domain socket or a tcp-port, but not both\n");

		return -1;

	}

	if (unixsocket && strlen(unixsocket) > sizeof(un.sun_path) - 1) {

		fprintf(stderr, "%s.%d: %s\n",

			__FILE__, __LINE__,

			"path of the unix socket is too long\n");

		return -1;

	}

	if (pid_file &&

	    (-1 == (pid_fd = open(pid_file, O_WRONLY | O_CREAT | O_EXCL | O_TRUNC)))) {

		struct stat st;

		if (errno != EEXIST) {

			fprintf(stderr, "%s.%d: opening pid-file '%s' failed: %s\n",

				__FILE__, __LINE__,

				pid_file, strerror(errno));

			return -1;

		}

		/* ok, file exists */

		if (0 != stat(pid_file, &st)) {

			fprintf(stderr, "%s.%d: stating pid-file '%s' failed: %s\n",

				__FILE__, __LINE__,

				pid_file, strerror(errno));

			return -1;

		}

		/* is it a regular file ? */

		if (!S_ISREG(st.st_mode)) {

			fprintf(stderr, "%s.%d: pid-file exists and isn't regular file: '%s'\n",

				__FILE__, __LINE__,

				pid_file);

			return -1;

		}

		if (-1 == (pid_fd = open(pid_file, O_WRONLY | O_CREAT | O_TRUNC))) {

			fprintf(stderr, "%s.%d: opening pid-file '%s' failed: %s\n",

				__FILE__, __LINE__,

				pid_file, strerror(errno));

			return -1;

		}

	}

    return fcgi_spawn_connection(fcgi_app, fcgi_app_argv, addr, port, unixsocket, fork_count, child_count, pid_fd, nofork);

}