完美解决windows+ngnix+phpcgi自动退出的问题

[摘要]在windows下搭建nginx+php环境时，php-cgi.exe会经常性的自动关闭退出，本文介绍通过使用xxfpm进程管理器管理php-cgi.exe。

    php-cgi.exe在windows+nginx平台下经常自动退出，网上搜到的大部分解决方法都是类似上面的批处理（代码如下）文件临时解决一下，但如果用户在网站登录的话，用户就会突然挂掉。

   

@echo off
:main
set jinchengshuliang=0
set jinchengshuliangxiaxian=2
for /f %%i in ('tasklist /nh^|findstr /i /s /c:"php-cgi.exe"') do set /a jinchengshuliang+=1

if %jinchengshuliang% lss %jinchengshuliangxiaxian% (   
goto youwenti
) else (
goto meiwenti
)  

:youwenti
echo 进程丢失，现在添加5个进程
RunHiddenConsole.exe  phpphp-cgi.exe -b 127.0.0.1:9000 -c phpphp.ini
RunHiddenConsole.exe  phpphp-cgi.exe -b 127.0.0.1:9000 -c phpphp.ini
RunHiddenConsole.exe  phpphp-cgi.exe -b 127.0.0.1:9000 -c phpphp.ini
RunHiddenConsole.exe  phpphp-cgi.exe -b 127.0.0.1:9000 -c phpphp.ini
RunHiddenConsole.exe  phpphp-cgi.exe -b 127.0.0.1:9000 -c phpphp.ini
ping 127.1 -n 8
goto main

:meiwenti
echo 正常运行中!
ping 127.1 -n 8
goto main

　

最好的解决办法是用windows下的php-cgi进程管理器，该进程管理器需要用到pthreadGC2.dll。源码和编译文件在本文结尾提供下载。经测试，支持Win32和Linux-x86平台。对于用php的人，有了这个东西来维护一定数量的进程，就能制服经常崩溃退出的php-cgi啦！

下载地址：http://down.chinaz.com/soft/31157.htm

以下是xxfpm进程管理器的操作参数：

Usage: xxfpm path [-n number] [-i ip] [-p port]
Manage FastCGI processes.

-n, --number number of processes to keep
-i, --ip ip address to bind
-p, --port port to bind, default is 8000
-u, --user start processes using specified linux user
-g, --group start processes using specified linux group
-r, --root change root direcotry for the processes
-h, --help output usage information and exit
-v, --version output version information and exit

第一个写得比较标准的终端应用程序，我是看了cygwin的里的一些源代码，然后学会了如何使用getopt，算是写得比较标准的，但是代码也不短。

使用例子：

xxfpm z:/php5/php-cgi.exe -n 5 -p 8080

　　有人问，如何给程序加入参数？这个不难，使用双引号即可，路径要用"/"而不用""。例如要指定php.ini的路径，可以用下面例子：

xxfpm "z:/php5/php-cgi.exe -c z:/php5/php.ini" -n 5 -i 127.0.0.1 -p 8080

维护进程原理：

　　Windows上使用CreateProcess创建进程，使用Wait For Single Object等待进程结束；Linux上使用fork和execl创建进程，使用waitpid等待进程结束。Linux的版本多了在创建子进程的时候可以设置进程限制，能够以受限用户方式来运行。

　　当进程管理器被关闭的时候，它所创建的所有子进程也必须被关闭。Windows上使用JobObject这个东西来把子进程与管理器的进程产生关联，感谢iceboy提供的资料！Linux上通过捕捉关闭信号，然后给所有子进程发送SIGTERM来结束子进程。详见源代码：

#ifdef __WIN32__

#ifndef _WIN32_WINNT
#define _WIN32_WINNT 0x0500
#endif //_WIN32_WINNT

#include <windows.h>
#include <winsock.h>
#include <wininet.h>
#define SHUT_RDWR SD_BOTH

#ifndef JOB_OBJECT_LIMIT_KILL_ON_JOB_CLOSE
#define JOB_OBJECT_LIMIT_KILL_ON_JOB_CLOSE (0x2000)
#endif
HANDLE FcpJobObject;

#else

#include <sys/socket.h>
#include <sys/wait.h>
#include <fcntl.h>
#include <arpa/inet.h>
#include <grp.h>
#include <pwd.h>
#include <unistd.h>
#define closesocket close

#endif //__WIN32__


#include <stdio.h>
#include <stdlib.h>
#include <getopt.h>
#include <string.h>
#include <pthread.h>
#include <errno.h>

#define MAX_PROCESSES 1024
static const char version[] = "$Revision: 0.01 $";
static char* prog_name;
int number = 1;
int port = 8000;
char *ip = "127.0.0.1";
char *user = "";
char *root = "";
char *path = "";
char *group = "";
int listen_fd;
struct sockaddr_in listen_addr;
int process_fp[MAX_PROCESSES];
int process_idx = 0;
pthread_t threads[MAX_PROCESSES];

static struct option longopts[] =
{
 {"help", no_argument, NULL, 'h'},
 {"version", no_argument, NULL, 'v'},
 {"number", required_argument, NULL, 'n'},
 {"ip", required_argument, NULL, 'i'},
 {"port", required_argument, NULL, 'p'},
 {"user", required_argument, NULL, 'u'},
 {"group", required_argument, NULL, 'g'},
 {"root", required_argument, NULL, 'r'},
 {NULL, 0, NULL, 0}
};

static char opts[] = "hvnipugr";

static void usage(FILE* where)
{
 fprintf(where, ""
  "Usage: %s path [-n number] [-i ip] [-p port]
"
  "Manage FastCGI processes.
"
  "
"
  " -n, --number  number of processes to keep
"
  " -i, --ip      ip address to bind
"
  " -p, --port    port to bind, default is 8000
"
  " -u, --user    start processes using specified linux user
"
  " -g, --group   start processes using specified linux group
"
  " -r, --root    change root direcotry for the processes
"
  " -h, --help    output usage information and exit
"
  " -v, --version output version information and exit
"
  "", prog_name);
 exit(where == stderr ? 1:0);
}

static void print_version()
{
 printf("%s %s

FastCGI Process Manager

Copyright 2010 Xiaoxia.org

Compiled on %s

", prog_name, version, __DATE__);
 exit(0);
}

static int try_to_bind()
{
 listen_addr.sin_family = PF_INET;
 listen_addr.sin_addr.s_addr = inet_addr( ip );
 listen_addr.sin_port = htons( port );
 listen_fd = socket(AF_INET, SOCK_STREAM, 0);
 
 if (-1 == bind(listen_fd, (struct sockaddr*)&listen_addr, sizeof(struct sockaddr_in)) ) {
  fprintf(stderr, "failed to bind %s:%d
", ip, port );
  return -1;
 }
 
 listen(listen_fd, MAX_PROCESSES);
 return 0;
}

static void* spawn_process(void* arg)
{
 int idx = process_idx ++, ret;
 while(1){
#ifdef __WIN32__
  STARTUPINFO si={0};
  PROCESS_INFORMATION pi={0};
  ZeroMemory(&si,sizeof(STARTUPINFO));
  si.cb = sizeof(STARTUPINFO);
  si.dwFlags = STARTF_USESTDHANDLES;
  si.hStdInput  = (HANDLE)listen_fd;
  si.hStdOutput = INVALID_HANDLE_VALUE;
  si.hStdError  = INVALID_HANDLE_VALUE;
  if(0 == (ret=CreateProcess(NULL, path,
   NULL,NULL,
   TRUE, CREATE_NO_WINDOW | CREATE_SUSPENDED | CREATE_BREAKAWAY_FROM_JOB,
   NULL,NULL,
   &si,&pi)) ){
   fprintf(stderr, "failed to create process %s, ret=%d
", path, ret);
   return NULL;
  }
  
  /* Use Job Control System */
  if(!AssignProcessToJobObject(FcpJobObject, pi.hProcess)){
   TerminateProcess(pi.hProcess, 1);
   CloseHandle(pi.hProcess);
   CloseHandle(pi.hThread);
   return NULL;
  }
  
  if(!ResumeThread(pi.hThread)){
   TerminateProcess(pi.hProcess, 1);
   CloseHandle(pi.hProcess);
   CloseHandle(pi.hThread);
   return NULL;
  }
  
  process_fp[idx] = (int)pi.hProcess;
  WaitForSingleObject(pi.hProcess, INFINITE);
  process_fp[idx] = 0;
  CloseHandle(pi.hThread);
#else
  ret = fork();
  switch(ret){
  case 0:{ //child
   /* change uid from root to other user */
   if(getuid()==0){ 
                struct group *grp = NULL;
                struct passwd *pwd = NULL;
    if (*user) {
     if (NULL == (pwd = getpwnam(user))) {
      fprintf(stderr, "[fcgi] %s %s
", "can't find username", user);
      exit(-1);
     }

     if (pwd->pw_uid == 0) {
      fprintf(stderr, "[fcgi] %s
", "what? dest uid == 0?" );
      exit(-1);
     }
    }

    if (*group) {
     if (NULL == (grp = getgrnam(group))) {
      fprintf(stderr, "[fcgi] %s %s
", "can't find groupname", group);
      exit(1);
     }

     if (grp->gr_gid == 0) {
      fprintf(stderr, "[fcgi] %s
", "what? dest gid == 0?" );
      exit(1);
     }
     /* do the change before we do the chroot() */
     setgid(grp->gr_gid);
     setgroups(0, NULL);

     if (user) {
      initgroups(user, grp->gr_gid);
     }
    }
    if (*root) {
     if (-1 == chroot(root)) {
      fprintf(stderr, "[fcgi] %s %s
", "can't change root", root);
      exit(1);
     }
     if (-1 == chdir("/")) {
      fprintf(stderr, "[fcgi] %s %s
", "can't change dir to", root);
      exit(1);
     }
    }

    /* drop root privs */
    if (*user) {
     setuid(pwd->pw_uid);
    }
   }
   
   int max_fd = 0, i=0;
   // Set stdin to listen_fd
   close(STDIN_FILENO);
   dup2(listen_fd, STDIN_FILENO);
   close(listen_fd);
   // Set stdout and stderr to dummy 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);
   // close other handles
   for(i=3; i<max_fd; i++)
    close(i);
   char *b = malloc(strlen("exec ") + strlen(path) + 1);
   strcpy(b, "exec ");
   strcat(b, path);
   
   /* exec the cgi */
   execl("/bin/sh", "sh", "-c", b, (char *)NULL);
   exit(errno);
   break;
  }
  case -1:
   fprintf(stderr, "[fcgi] fork failed
");
   return NULL;
  default:{
   struct timeval tv = { 0, 100 * 1000 };
   int status;
   select(0, NULL, NULL, NULL, &tv);
   switch(waitpid(ret, &status, WNOHANG)){
   case 0:
    printf("[fcg] spawned process %s: %d
", path, ret);
    break;
   case -1:
    fprintf(stderr, "[fcgi] waitpid failed
");
    return NULL;
   default:
    if (WIFEXITED(status)) {
      fprintf(stderr, "[fcgi] child exited with: %d
", WEXITSTATUS(status));
    } else if (WIFSIGNALED(status)) {
      fprintf(stderr, "[fcgi] child signaled: %d
", WTERMSIG(status));
    } else {
      fprintf(stderr, "[fcgi] child died somehow: %d
", status);
    }
    return NULL;
   }
   //wait for child process to exit
   process_fp[idx] = ret;
   waitpid(ret, &status, 0);
   process_fp[idx] = 0;
  }
  }
#endif
 }
}

static int start_processes()
{
 int i;
 pthread_attr_t attr;
 pthread_attr_init(&attr);
 pthread_attr_setstacksize(&attr, 64*1024); //64KB
 for(i=0; i<number; i++){
  if( pthread_create( &threads, &attr, spawn_process, NULL ) == -1 ){
   fprintf(stderr, "failed to create thread %d
", i);
  }
 }
 
 for(i=0; i<number; i++){
  pthread_join(threads, NULL);
 }
 return 0;
}

#ifdef __WIN32__
void init_win32()
{
 /* init win32 socket */
 static WSADATA wsa_data; 
 if(WSAStartup((WORD)(1<<8|1), &wsa_data) != 0)
  exit(1);
 JOBOBJECT_EXTENDED_LIMIT_INFORMATION limit;
 FcpJobObject = (HANDLE)CreateJobObject(NULL, NULL);
 if(FcpJobObject == NULL) 
  exit(1);
 
 /* let all processes assigned to this job object
  * being killed when the job object closed */
 if (!QueryInformationJobObject(FcpJobObject, JobObjectExtendedLimitInformation, &limit, sizeof(limit), NULL)) {
  CloseHandle(FcpJobObject);
  exit(1);
 }

 limit.BasicLimitInformation.LimitFlags |= JOB_OBJECT_LIMIT_KILL_ON_JOB_CLOSE;

 if (!SetInformationJobObject(FcpJobObject, JobObjectExtendedLimitInformation, &limit, sizeof(limit))) {
  CloseHandle(FcpJobObject);
  exit(1);
 }
}
#endif //__WIN32__

#ifndef __WIN32__
void before_exit(int sig)
{
 signal(SIGTERM, SIG_DFL);
 /* call child processes to exit */
 kill(0, SIGTERM);
}
#endif

int main(int argc, char **argv)
{
 prog_name = strrchr(argv[0], '/');
 if(prog_name == NULL)
  prog_name = strrchr(argv[0], '\');
 if(prog_name == NULL)
  prog_name = argv[0];
 else
  prog_name++;
 
 if(argc == 1)
  usage(stderr);
 
 path = argv[1];
 
 opterr = 0;
 
 char* p;

 for(;;){
  int ch;
  if((ch = getopt_long(argc, argv, opts, longopts, NULL)) == EOF)
   break;
  char *av = argv[optind];
  switch(ch){
  case 'h':
   usage(stdout);
   break;
  case 'v':
   print_version();
   break;
  case 'n':
   number = atoi(av);
   if(number > MAX_PROCESSES){
    fprintf(stderr, "exceeds MAX_PROCESSES!
");
    number = MAX_PROCESSES;
   }
   break;
  case 'u':
   user = av;
   break;
  case 'r':
   root = av;
   break;
  case 'g':
   group = av;
   break;
  case 'i':
   ip = av;
   break;
  case 'p':
   port = atoi(av);
   break;
  default:
   usage(stderr);
   break;
  }
 }

#ifdef __WIN32__
 init_win32();
#else
 /* call child processes to exit */
 signal(SIGTERM, before_exit);
 signal(SIGINT, before_exit);
 signal(SIGABRT, before_exit);
#endif
 
 int ret;
 ret = try_to_bind();
 if(ret != 0)
  return ret;
 ret = start_processes();
 if(ret !=0)
  return ret;
 
 
#ifdef __WIN32__
 CloseHandle(FcpJobObject);
 WSACleanup();
#endif
 return 0;
}

 来源：http://down.chinaz.com/server/201111/1334_1.htm