mirror of https://github.com/BOINC/boinc.git
375 lines
11 KiB
C
375 lines
11 KiB
C
// Berkeley Open Infrastructure for Network Computing
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// http://boinc.berkeley.edu
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// Copyright (C) 2005 University of California
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//
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// This is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation;
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// either version 2.1 of the License, or (at your option) any later version.
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//
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// This software is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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// See the GNU Lesser General Public License for more details.
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//
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// To view the GNU Lesser General Public License visit
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// http://www.gnu.org/copyleft/lesser.html
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// or write to the Free Software Foundation, Inc.,
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// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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// The BOINC scheduling server.
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//
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// command-line options:
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#include <cassert>
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#include <cstdio>
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#include <vector>
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#include <string>
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using namespace std;
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#include <unistd.h>
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#include <signal.h>
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#include <errno.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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#include "boinc_db.h"
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#include "parse.h"
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#include "filesys.h"
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#include "error_numbers.h"
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#include "shmem.h"
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#include "util.h"
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#include "sched_config.h"
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#include "server_types.h"
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#include "handle_request.h"
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#include "sched_util.h"
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#include "sched_msgs.h"
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#include "main.h"
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#ifdef _USING_FCGI_
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#include "fcgi_stdio.h"
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#endif
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// Useful for debugging, if your cgi script keeps crashing. This
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// makes it dump a core file that you can load into a debugger to see
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// where the problem is.
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#define DUMP_CORE_ON_SEGV 0
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#define DEBUG_LEVEL 999
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#define MAX_FCGI_COUNT 20
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#define REQ_FILE_PREFIX "boinc_req_"
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#define REPLY_FILE_PREFIX "boinc_reply_"
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bool use_files = false; // use disk files for req/reply msgs (for debugging)
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SCHED_CONFIG config;
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GUI_URLS gui_urls;
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key_t sema_key;
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int g_pid;
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static bool db_opened=false;
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void send_message(const char* msg, int delay, bool send_header) {
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if (send_header) {
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printf("Content-type: text/plain\n\n");
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}
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printf(
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"<scheduler_reply>\n"
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" <message priority=\"low\">%s</message>\n"
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" <request_delay>%d</request_delay>\n"
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" <project_is_down/>\n"
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"</scheduler_reply>\n",
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msg, delay
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);
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}
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int open_database() {
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int retval;
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if (db_opened) return 0;
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retval = boinc_db.open(config.db_name, config.db_host, config.db_user, config.db_passwd);
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if (retval) {
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log_messages.printf(SCHED_MSG_LOG::CRITICAL, "can't open database\n");
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return retval;
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}
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db_opened = true;
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return 0;
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}
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void debug_sched(SCHEDULER_REQUEST& sreq, SCHEDULER_REPLY& sreply, const char *trigger);
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// If the scheduler 'hangs', which it can do if a request is not fully processed
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// or some other process arises, then Apache will send a SIGTERM to the cgi.
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// This signal handler ensures that rather than dying silently, the cgi process
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// will leave behind some record in the log file.
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//
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void sigterm_handler(int signo) {
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log_messages.printf(SCHED_MSG_LOG::CRITICAL,
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"Caught signal %d [scheduler ran %d seconds]. Exit(1)ing\n",
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signo, elapsed_time()
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);
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fflush(NULL);
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exit(1);
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return;
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}
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void log_request_info(int& length) {
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char *cl=getenv("CONTENT_LENGTH");
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char *ri=getenv("REMOTE_ADDR");
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char *rm=getenv("REQUEST_METHOD");
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char *ct=getenv("CONTENT_TYPE");
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char *ha=getenv("HTTP_ACCEPT");
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char *hu=getenv("HTTP_USER_AGENT");
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log_messages.printf(SCHED_MSG_LOG::DEBUG,
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"REQUEST_METHOD=%s "
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"CONTENT_TYPE=%s "
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"HTTP_ACCEPT=%s "
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"HTTP_USER_AGENT=%s\n",
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rm?rm:"" , ct?ct:"", ha?ha:"", hu?hu:""
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);
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if (!cl) {
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log_messages.printf(SCHED_MSG_LOG::CRITICAL, "CONTENT_LENGTH environment variable not set\n");
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}
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else {
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length=atoi(cl);
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log_messages.printf(SCHED_MSG_LOG::DEBUG, "CONTENT_LENGTH=%d from %s\n", length, ri?ri:"[Unknown]");
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}
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}
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#if DUMP_CORE_ON_SEGV
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void set_core_dump_size_limit() {
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struct rlimit limit;
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if (getrlimit(RLIMIT_CORE, &limit)) {
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log_messages.printf(SCHED_MSG_LOG::CRITICAL,
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"Unable to read resource limit for core dump size.\n"
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);
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} else {
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char short_string[256], *short_message=short_string;
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short_message += sprintf(short_message,"Default resource limit for core dump size curr=");
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if (limit.rlim_cur == RLIM_INFINITY)
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short_message += sprintf(short_message,"Inf max=");
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else
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short_message += sprintf(short_message,"%d max=", (int)limit.rlim_cur);
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if (limit.rlim_max == RLIM_INFINITY)
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short_message += sprintf(short_message,"Inf\n");
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else
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short_message += sprintf(short_message,"%d\n", (int)limit.rlim_max);
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log_messages.printf(SCHED_MSG_LOG::DEBUG, "%s", short_string);
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// now set limit to the maximum allowed value
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limit.rlim_cur=limit.rlim_max;
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if (setrlimit(RLIMIT_CORE, &limit)) {
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log_messages.printf(SCHED_MSG_LOG::CRITICAL,
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"Unable to set current resource limit for core dump size to max value.\n"
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);
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} else {
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log_messages.printf(SCHED_MSG_LOG::DEBUG,
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"Set limit for core dump size to max value.\n"
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);
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}
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}
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}
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#endif
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int main() {
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FILE* fin, *fout;
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int i, retval;
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char req_path[256], reply_path[256], path[256];
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SCHED_SHMEM* ssp=0;
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void* p;
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unsigned int counter=0;
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char* code_sign_key;
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bool project_stopped = false;
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int length=-1;
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log_messages.pid = getpid();
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// initialized timer
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elapsed_time();
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// install a signal handler that catches SIGTERMS sent by Apache if the cgi
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// times out.
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//
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signal(SIGTERM, sigterm_handler);
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#ifndef _USING_FCGI_
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char *stderr_buffer, buf[256];
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get_log_path(path, "cgi.log");
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if (!freopen(path, "a", stderr)) {
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fprintf(stderr, "Can't redirect stderr\n");
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sprintf(buf, "Server can't open log file (%s)", path);
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send_message(buf, 3600, true);
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exit(0);
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}
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// install a larger buffer for stderr. This ensures that
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// log information from different scheduler requests running
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// in parallel don't collide in the log file and appear
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// intermingled.
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//
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if (!(stderr_buffer=(char *)malloc(32768)) || setvbuf(stderr, stderr_buffer, _IOFBF, 32768)) {
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log_messages.printf(SCHED_MSG_LOG::CRITICAL,
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"Unable to change stderr buffering preferences\n"
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);
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}
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#endif
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srand(time(0)+getpid());
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log_messages.set_debug_level(DEBUG_LEVEL);
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#if DUMP_CORE_ON_SEGV
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set_core_dump_size_limit();
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#endif
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if (check_stop_sched()) {
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send_message("Project is temporarily shut down for maintenance", 3600, true);
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goto done;
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}
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retval = config.parse_file("..");
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if (retval) {
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log_messages.printf(SCHED_MSG_LOG::CRITICAL, "Can't parse config file\n");
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send_message("Server can't parse configuration file", 3600, true);
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exit(0);
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}
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gui_urls.init();
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sprintf(path, "%s/code_sign_public", config.key_dir);
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retval = read_file_malloc(path, code_sign_key);
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if (retval) {
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log_messages.printf(SCHED_MSG_LOG::CRITICAL,
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"Can't read code sign key file (%s)\n", path
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);
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send_message("Server can't find key file", 3600, true);
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exit(0);
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}
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get_project_dir(path, sizeof(path));
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get_key(path, 'a', sema_key);
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retval = attach_shmem(config.shmem_key, &p);
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if (retval || p==0) {
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log_messages.printf(SCHED_MSG_LOG::CRITICAL,
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"Can't attach shmem (feeder not running?)\n"
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);
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project_stopped = true;
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} else {
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ssp = (SCHED_SHMEM*)p;
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retval = ssp->verify();
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if (retval) {
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log_messages.printf(SCHED_MSG_LOG::CRITICAL,
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"shmem has wrong struct sizes - recompile\n"
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);
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send_message("Server has software problem", 3600, true);
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exit(0);
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}
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for (i=0; i<10; i++) {
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if (ssp->ready) break;
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log_messages.printf(SCHED_MSG_LOG::DEBUG, "waiting for ready flag\n");
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sleep(1);
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}
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if (!ssp->ready) {
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log_messages.printf(SCHED_MSG_LOG::CRITICAL, "feeder doesn't seem to be running\n");
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send_message("Server has software problem", 3600, true);
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exit(0);
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}
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}
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g_pid = getpid();
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#ifdef _USING_FCGI_
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//while(FCGI_Accept() >= 0 && counter < MAX_FCGI_COUNT) {
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while(FCGI_Accept() >= 0) {
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counter++;
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#endif
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if (project_stopped) {
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send_message("Project is temporarily shut down for maintenance", 3600, true);
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goto done;
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}
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log_request_info(length);
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fprintf(stdout,"Content-type: text/plain\n\n");
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if (use_files) {
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struct stat statbuf;
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// the code below is convoluted because,
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// instead of going from stdin to stdout directly,
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// we go via a pair of disk files
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// (this makes it easy to save the input,
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// and to know the length of the output).
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//
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sprintf(req_path, "%s%d_%u", REQ_FILE_PREFIX, g_pid, counter);
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sprintf(reply_path, "%s%d_%u", REPLY_FILE_PREFIX, g_pid, counter);
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fout = fopen(req_path, "w");
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if (!fout) {
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log_messages.printf(SCHED_MSG_LOG::CRITICAL, "can't write request file\n");
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exit(1);
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}
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copy_stream(stdin, fout);
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fclose(fout);
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stat(req_path, &statbuf);
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if (length>=0 && (statbuf.st_size != length)) {
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log_messages.printf(SCHED_MSG_LOG::CRITICAL,
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"Request length %d != CONTENT_LENGTH %d\n",
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(int)statbuf.st_size, length
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);
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}
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fin = fopen(req_path, "r");
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if (!fin) {
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log_messages.printf(SCHED_MSG_LOG::CRITICAL, "can't read request file\n");
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exit(1);
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}
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fout = fopen(reply_path, "w");
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if (!fout) {
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log_messages.printf(SCHED_MSG_LOG::CRITICAL, "can't write reply file\n");
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exit(1);
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}
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handle_request(fin, fout, *ssp, code_sign_key);
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fclose(fin);
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fclose(fout);
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fin = fopen(reply_path, "r");
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if (!fin) {
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log_messages.printf(SCHED_MSG_LOG::CRITICAL, "can't read reply file\n");
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exit(1);
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}
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copy_stream(fin, stdout);
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fclose(fin);
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#ifdef EINSTEIN_AT_HOME
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if (getenv("CONTENT_LENGTH")) unlink(req_path);
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if (getenv("CONTENT_LENGTH")) unlink(reply_path);
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#else
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// unlink(req_path);
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// unlink(reply_path);
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#endif
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} else {
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handle_request(stdin, stdout, *ssp, code_sign_key);
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}
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done:
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#ifdef _USING_FCGI_
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fprintf(stderr, "FCGI: counter: %d\n", counter);
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continue;
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}
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if (counter == MAX_FCGI_COUNT) {
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fprintf(stderr, "FCGI: counter passed MAX_FCGI_COUNT - exiting..\n");
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} else {
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fprintf(stderr, "FCGI: FCGI_Accept failed - exiting..\n");
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}
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// when exiting, write headers back to apache so it won't complain
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// about "incomplete headers"
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fprintf(stdout,"Content-type: text/plain\n\n");
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#endif
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if (db_opened) {
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boinc_db.close();
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}
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}
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const char *BOINC_RCSID_0ebdf5d770 = "$Id$";
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