From e2423ec6df4727cb44d745aba81fa9b0e2198ad7 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Stefan=20B=C3=BChler?= Date: Fri, 6 Feb 2009 20:15:33 +0000 Subject: [PATCH] initial import git-svn-id: svn://svn.lighttpd.net/spawn-fcgi/trunk@1 4a9f3682-ca7b-49a8-9a55-ba4640e46f83 --- AUTHORS | 1 + COPYING | 31 +++ Makefile.am | 4 + NEWS | 8 + README | 13 ++ autogen.sh | 24 +++ configure.ac | 41 ++++ spawn-fcgi.1 | 62 ++++++ src/Makefile.am | 3 + src/spawn-fcgi.c | 503 +++++++++++++++++++++++++++++++++++++++++++++++ 10 files changed, 690 insertions(+) create mode 100644 AUTHORS create mode 100644 COPYING create mode 100644 Makefile.am create mode 100644 NEWS create mode 100644 README create mode 100755 autogen.sh create mode 100644 configure.ac create mode 100644 spawn-fcgi.1 create mode 100644 src/Makefile.am create mode 100644 src/spawn-fcgi.c diff --git a/AUTHORS b/AUTHORS new file mode 100644 index 0000000..80ea411 --- /dev/null +++ b/AUTHORS @@ -0,0 +1 @@ +jan kneschke diff --git a/COPYING b/COPYING new file mode 100644 index 0000000..1333e45 --- /dev/null +++ b/COPYING @@ -0,0 +1,31 @@ + + +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. + diff --git a/Makefile.am b/Makefile.am new file mode 100644 index 0000000..3363dc4 --- /dev/null +++ b/Makefile.am @@ -0,0 +1,4 @@ +SUBDIRS=src + +EXTRA_DIST=autogen.sh +man1_MANS=spawn-fcgi.1 diff --git a/NEWS b/NEWS new file mode 100644 index 0000000..ebe2215 --- /dev/null +++ b/NEWS @@ -0,0 +1,8 @@ + +==== +NEWS +==== + +- 1.6.0 - + + * Separated spawn-fcgi from lighttpd diff --git a/README b/README new file mode 100644 index 0000000..e18df8d --- /dev/null +++ b/README @@ -0,0 +1,13 @@ + +========== +spawn-fcgi +========== + +:author: Jan Kneschke + +:abstract: + spawn-fcgi is used to spawn fastcgi applications + +Features +-------- +- binds to IPv4 and unix sockets diff --git a/autogen.sh b/autogen.sh new file mode 100755 index 0000000..7673deb --- /dev/null +++ b/autogen.sh @@ -0,0 +1,24 @@ +#!/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." diff --git a/configure.ac b/configure.ac new file mode 100644 index 0000000..ab45e0e --- /dev/null +++ b/configure.ac @@ -0,0 +1,41 @@ +# -*- 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 +#include ]) + +# 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 diff --git a/spawn-fcgi.1 b/spawn-fcgi.1 new file mode 100644 index 0000000..3cabd9f --- /dev/null +++ b/spawn-fcgi.1 @@ -0,0 +1,62 @@ +.TH spawn-fcgi 1 2009-02-06 +.SH NAME +spawn-fcgi \- Spawns FastCGI processes +.SH SYNOPSIS +.B spawn-fcgi +[options] [ -- [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 +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 is given. +.TP 8 +.B \-a +IP address to bind to (for TCP/IP-based IPC) +.TP 8 +.B \-p +TCP port to bind to (for TCP/IP-based IPC) +.TP 8 +.B \-s +Path to the Unix-domain socket to bind to (for Unix sockets-based IPC) +.TP 8 +.B \-C +(PHP only) Number of children to spawn. Defaults to 5. +.TP 8 +.B \-F +Number of children to fork. Defaults to 1. +.TP 8 +.B \-P +Name of the PID file for spawned processes +.TP 8 +.B \-n +No forking should take place (for daemontools) +.TP 8 +.B \-c +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 , for +the Debian GNU/linux system (but may be used by others). diff --git a/src/Makefile.am b/src/Makefile.am new file mode 100644 index 0000000..97a3236 --- /dev/null +++ b/src/Makefile.am @@ -0,0 +1,3 @@ + +bin_PROGRAMS=spawn-fcgi +spawn_fcgi_SOURCES=spawn-fcgi.c diff --git a/src/spawn-fcgi.c b/src/spawn-fcgi.c new file mode 100644 index 0000000..cbe930c --- /dev/null +++ b/src/spawn-fcgi.c @@ -0,0 +1,503 @@ +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#ifdef __WIN32 + +#include + +#define ECONNRESET WSAECONNRESET +#define EINPROGRESS WSAEINPROGRESS +#define EALREADY WSAEALREADY +#define ECONNABORTED WSAECONNABORTED +#define ioctl ioctlsocket +#define hstrerror(x) "" + +#else /* _WIN32 */ + +#include +#include +#include +#include +#include +#include + +#include + +#endif /* _WIN32 */ + + +#include +#include +#include + +#include +#include +#include +#include +#include +#include + +#ifdef HAVE_PWD_H +#include +#include +#endif + +#ifdef HAVE_GETOPT_H +#include +#endif + +#define FCGI_LISTENSOCK_FILENO 0 + +#ifdef HAVE_SYS_WAIT_H +#include +#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] [-- [fcgi app arguments]]\n" \ +"\n" \ +"spawn-fcgi v" PACKAGE_VERSION " - spawns fastcgi processes\n" \ +"\n" \ +"Options:\n" \ +" -f filename of the fcgi-application (ignored if is given)\n" \ +" -a bind to ip address\n" \ +" -p bind to tcp-port\n" \ +" -s bind to unix-domain socket\n" \ +" -C (PHP only) numbers of childs to spawn (default 5)\n" \ +" -F numbers of childs to fork (default 1)\n" \ +" -P 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 chroot to directory\n" \ +" -u change to user-id\n" \ +" -g 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