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boinc/sched/main.C

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