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git-svn-id: svn://svn.lighttpd.net/spawn-fcgi/trunk@1 4a9f3682-ca7b-49a8-9a55-ba4640e46f83
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Stefan Bühler 2009-02-06 20:15:33 +00:00
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1
AUTHORS Normal file
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jan kneschke <jan@kneschke.de>

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COPYING Normal file
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Copyright (c) 2004, Jan Kneschke, incremental
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
- Redistributions of source code must retain the above copyright notice, this
list of conditions and the following disclaimer.
- Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
- Neither the name of the 'incremental' nor the names of its contributors may
be used to endorse or promote products derived from this software without
specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
THE POSSIBILITY OF SUCH DAMAGE.

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Makefile.am Normal file
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SUBDIRS=src
EXTRA_DIST=autogen.sh
man1_MANS=spawn-fcgi.1

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NEWS Normal file
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====
NEWS
====
- 1.6.0 -
* Separated spawn-fcgi from lighttpd

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README Normal file
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==========
spawn-fcgi
==========
:author: Jan Kneschke
:abstract:
spawn-fcgi is used to spawn fastcgi applications
Features
--------
- binds to IPv4 and unix sockets

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autogen.sh Executable file
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#!/bin/sh
# Run this to generate all the initial makefiles, etc.
ACLOCAL=${ACLOCAL:-aclocal}
AUTOHEADER=${AUTOHEADER:-autoheader}
AUTOMAKE=${AUTOMAKE:-automake}
AUTOMAKE_FLAGS="--add-missing --copy"
AUTOCONF=${AUTOCONF:-autoconf}
ARGV0=$0
set -e
run() {
echo "$ARGV0: running \`$@'"
$@
}
run $ACLOCAL $ACLOCAL_FLAGS
run $AUTOHEADER
run $AUTOMAKE $AUTOMAKE_FLAGS
run $AUTOCONF
echo "Now type './configure ...' and 'make' to compile."

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configure.ac Normal file
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# -*- Autoconf -*-
# Process this file with autoconf to produce a configure script.
AC_PREREQ(2.61)
AC_INIT([spawn-fcgi],[1.6.0])
AC_CONFIG_SRCDIR([src/spawn-fcgi.c])
AC_CONFIG_HEADER([config.h])
AM_INIT_AUTOMAKE([-Wall -Werror foreign])
# Checks for programs.
AC_PROG_CC
AC_PROG_MAKE_SET
# Checks for libraries.
# Checks for header files.
AC_HEADER_STDC
AC_HEADER_SYS_WAIT
AC_CHECK_HEADERS([arpa/inet.h errno.h fcntl.h getopt.h grp.h netdb.h \
netinet/in.h netinet/tcp.h pwd.h stdio.h stdlib.h \
string.h sys/ioctl.h sys/socket.h sys/stat.h sys/time.h \
sys/types.h sys/un.h sys/wait.h unistd.h])
# Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_TYPE_PID_T
AC_HEADER_TIME
AC_CHECK_TYPES(socklen_t,,,[#include <sys/types.h>
#include <sys/socket.h>])
# Checks for library functions.
AC_FUNC_FORK
AC_FUNC_MALLOC
AC_FUNC_SELECT_ARGTYPES
AC_FUNC_STAT
AC_CHECK_FUNCS([dup2 memset putenv select socket strerror strtol])
AC_CONFIG_FILES([Makefile src/Makefile])
AC_OUTPUT

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spawn-fcgi.1 Normal file
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.TH spawn-fcgi 1 2009-02-06
.SH NAME
spawn-fcgi \- Spawns FastCGI processes
.SH SYNOPSIS
.B spawn-fcgi
[options] [ -- <fcgiapp> [fcgi app arguments]]
.B spawn-fcgi
\-v
.B spawn-fcgi
\-h
.SH DESCRIPTION
\fIspawn-fcgi\fP is used to spawn remote FastCGI processes.
.SH OPTIONS
\fIspawn-fcgi\fP accepts the following options:
.TP 8
.B \-f <path>
Filename of the FastCGI application to spawn. If you need to specify
additional arguments, specify the application and its parameters after "--";
this option is ignored if <fcgiapp> is given.
.TP 8
.B \-a <addr>
IP address to bind to (for TCP/IP-based IPC)
.TP 8
.B \-p <port>
TCP port to bind to (for TCP/IP-based IPC)
.TP 8
.B \-s <path>
Path to the Unix-domain socket to bind to (for Unix sockets-based IPC)
.TP 8
.B \-C <children>
(PHP only) Number of children to spawn. Defaults to 5.
.TP 8
.B \-F <children>
Number of children to fork. Defaults to 1.
.TP 8
.B \-P <path>
Name of the PID file for spawned processes
.TP 8
.B \-n
No forking should take place (for daemontools)
.TP 8
.B \-c <dir>
Chroot to specified directory (can only be invoked by root)
.TP 8
.B \-u
User ID to change to (can only be invoked by root)
.TP 8
.B \-g
Group ID to change to (can only be invoked by root)
.TP 8
.B \-h
General usage instructions
.TP 8
.B \-v
Shows version information and exits
.PP
This program is a part of the Lighttpd web server, \&\fIlighttpd\fR\|(1)
.SH AUTHOR
This manual page was written by Gunnar Wolf <gwolf@debian.org>, for
the Debian GNU/linux system (but may be used by others).

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src/Makefile.am Normal file
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bin_PROGRAMS=spawn-fcgi
spawn_fcgi_SOURCES=spawn-fcgi.c

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src/spawn-fcgi.c Normal file
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#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef __WIN32
#include <winsock2.h>
#define ECONNRESET WSAECONNRESET
#define EINPROGRESS WSAEINPROGRESS
#define EALREADY WSAEALREADY
#define ECONNABORTED WSAECONNABORTED
#define ioctl ioctlsocket
#define hstrerror(x) ""
#else /* _WIN32 */
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <sys/un.h>
#include <arpa/inet.h>
#include <netdb.h>
#endif /* _WIN32 */
#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>
#ifdef HAVE_PWD_H
#include <grp.h>
#include <pwd.h>
#endif
#ifdef HAVE_GETOPT_H
#include <getopt.h>
#endif
#define FCGI_LISTENSOCK_FILENO 0
#ifdef HAVE_SYS_WAIT_H
#include <sys/wait.h>
#endif
/* for solaris 2.5 and netbsd 1.3.x */
#ifndef HAVE_SOCKLEN_T
typedef int socklen_t;
#endif
#ifdef HAVE_SYS_UN_H
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) {
int fcgi_fd;
int socket_type, status, rc = 0;
struct timeval tv = { 0, 100 * 1000 };
struct sockaddr_un fcgi_addr_un;
struct sockaddr_in fcgi_addr_in;
struct sockaddr *fcgi_addr;
socklen_t servlen;
if (child_count < 2) {
child_count = 5;
}
if (child_count > 256) {
child_count = 256;
}
if (unixsocket) {
memset(&fcgi_addr_un, 0, sizeof(fcgi_addr_un));
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 {
memset(&fcgi_addr_in, 0, sizeof(fcgi_addr_in));
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;
}
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 */
pid_t child;
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, &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) {
if (!nofork) {
child = fork();
} else {
child = 0;
}
switch (child) {
case 0: {
char cgi_childs[64];
int max_fd = 0;
int i = 0;
/* loose control terminal */
setsid();
/* is safe as we limit to 256 childs */
sprintf(cgi_childs, "PHP_FCGI_CHILDREN=%d", child_count);
if(fcgi_fd != FCGI_LISTENSOCK_FILENO) {
close(FCGI_LISTENSOCK_FILENO);
dup2(fcgi_fd, FCGI_LISTENSOCK_FILENO);
close(fcgi_fd);
}
max_fd = open("/dev/null", O_RDWR);
close(STDERR_FILENO);
dup2(max_fd, STDERR_FILENO);
close(max_fd);
max_fd = open("/dev/null", O_RDWR);
close(STDOUT_FILENO);
dup2(max_fd, STDOUT_FILENO);
close(max_fd);
/* we don't need the client socket */
for (i = 3; i < max_fd; i++) {
if (i != FCGI_LISTENSOCK_FILENO) close(i);
}
/* create environment */
putenv(cgi_childs);
/* fork and replace shell */
if (appArgv) {
execv(appArgv[0], appArgv);
} else {
char *b = malloc(strlen("exec ") + strlen(appPath) + 1);
strcpy(b, "exec ");
strcat(b, appPath);
/* exec the cgi */
execl("/bin/sh", "sh", "-c", b, (char *)NULL);
}
exit(errno);
break;
}
case -1:
/* error */
break;
default:
/* father */
/* wait */
select(0, NULL, NULL, NULL, &tv);
switch (waitpid(child, &status, WNOHANG)) {
case 0:
fprintf(stdout, "%s.%d: child spawned successfully: PID: %d\n",
__FILE__, __LINE__,
child);
/* write pid file */
if (pid_fd != -1) {
/* assume a 32bit pid_t */
char pidbuf[12];
snprintf(pidbuf, sizeof(pidbuf) - 1, "%d", child);
write(pid_fd, pidbuf, strlen(pidbuf));
/* avoid eol for the last one */
if (fork_count != 0) {
write(pid_fd, "\n", 1);
}
}
break;
case -1:
break;
default:
if (WIFEXITED(status)) {
fprintf(stderr, "%s.%d: child exited with: %d\n",
__FILE__, __LINE__, WEXITSTATUS(status));
rc = WEXITSTATUS(status);
} else if (WIFSIGNALED(status)) {
fprintf(stderr, "%s.%d: child signaled: %d\n",
__FILE__, __LINE__,
WTERMSIG(status));
rc = 1;
} else {
fprintf(stderr, "%s.%d: child died somehow: %d\n",
__FILE__, __LINE__,
status);
rc = status;
}
}
break;
}
}
close(pid_fd);
pid_fd = -1;
} else {
fprintf(stderr, "%s.%d: socket is already used, can't spawn\n",
__FILE__, __LINE__);
return -1;
}
close(fcgi_fd);
return rc;
}
void show_version () {
char *b = "spawn-fcgi" "-" PACKAGE_VERSION \
" - 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 v" PACKAGE_VERSION " - spawns fastcgi processes\n" \
"\n" \
"Options:\n" \
" -f <path> filename of the fcgi-application (ignored if <fcgiapp> is given)\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, *changeroot = NULL, *username = NULL,
*groupname = 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 i_am_root, o;
int pid_fd = -1;
int nofork = 0;
struct sockaddr_un un;
i_am_root = (getuid() == 0);
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 'c': if (i_am_root) { changeroot = optarg; }/* chroot() */ break;
case 'u': if (i_am_root) { username = optarg; } /* set user */ break;
case 'g': if (i_am_root) { groupname = optarg; } /* set group */ 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;
}
/* UID handling */
if (!i_am_root && (geteuid() == 0 || getegid() == 0)) {
/* we are setuid-root */
fprintf(stderr, "%s.%d: %s\n",
__FILE__, __LINE__,
"Are you nuts ? Don't apply a SUID bit to this binary\n");
return -1;
}
if (pid_file &&
(-1 == (pid_fd = open(pid_file, O_WRONLY | O_CREAT | O_EXCL | O_TRUNC, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH)))) {
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, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH))) {
fprintf(stderr, "%s.%d: opening pid-file '%s' failed: %s\n",
__FILE__, __LINE__,
pid_file, strerror(errno));
return -1;
}
}
if (i_am_root) {
struct group *grp = NULL;
struct passwd *pwd = NULL;
/* set user and group */
if (username) {
if (NULL == (pwd = getpwnam(username))) {
fprintf(stderr, "%s.%d: %s, %s\n",
__FILE__, __LINE__,
"can't find username", username);
return -1;
}
if (pwd->pw_uid == 0) {
fprintf(stderr, "%s.%d: %s\n",
__FILE__, __LINE__,
"I will not set uid to 0\n");
return -1;
}
}
if (groupname) {
if (NULL == (grp = getgrnam(groupname))) {
fprintf(stderr, "%s.%d: %s %s\n",
__FILE__, __LINE__,
"can't find groupname",
groupname);
return -1;
}
if (grp->gr_gid == 0) {
fprintf(stderr, "%s.%d: %s\n",
__FILE__, __LINE__,
"I will not set gid to 0\n");
return -1;
}
/* do the change before we do the chroot() */
setgid(grp->gr_gid);
setgroups(0, NULL);
if (username) {
initgroups(username, grp->gr_gid);
}
}
if (changeroot) {
if (-1 == chroot(changeroot)) {
fprintf(stderr, "%s.%d: %s %s\n",
__FILE__, __LINE__,
"chroot failed: ", strerror(errno));
return -1;
}
if (-1 == chdir("/")) {
fprintf(stderr, "%s.%d: %s %s\n",
__FILE__, __LINE__,
"chdir failed: ", strerror(errno));
return -1;
}
}
/* drop root privs */
if (username) {
setuid(pwd->pw_uid);
}
}
return fcgi_spawn_connection(fcgi_app, fcgi_app_argv, addr, port, unixsocket, fork_count, child_count, pid_fd, nofork);
}
#else
int main() {
return -1;
}
#endif