Subversion Repositories wimsdev

/*    Copyright (C) 1998-2003 XIAO, Gang of Universite de Nice - Sophia Antipolis

 *

 *  This program is free software; you can redistribute it and/or modify

 *  it under the terms of the GNU General Public License as published by

 *  the Free Software Foundation; either version 2 of the License, or

 *  (at your option) any later version.

 *

 *  This program 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 General Public License for more details.

 *

 *  You should have received a copy of the GNU General Public License

 *  along with this program; if not, write to the Free Software

 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

 */

/* WIMS log daemon */

#include "wimslogd.h"

extern char **environ;

char cwd[MAX_FNAME+1];

char pidstr[32];

char keepdate[32]="0";

char mupdate[32]="0";

char backdate[32]="0";

char loadavg[MAX_LINELEN+1];

char qbuf[MAX_LINELEN+1];       /* quota buffer */

time_t nowtime, starttime, lastcleantime=0;

time_t thismin, lastmin, startmin;

struct tm *now;

int nowsec, nowmin, nowhr, nowday, nowwday,nowmon,nowyear;

int startdate;

char nowstr[64];

pid_t mypid;

int idle_time=5000;

int idle_time2=5000;

int idle_time3=5000;

int anti_time=3600*24;  /* antidate tolerance */

int OLD_LOG_FILES=2;

int GEN_LOG_LIMIT=1024000;

int MODULE_LOG_LIMIT=102400;

int backup_hour=-1;

int site_accounting=0;

int modupdatetime=0;

int rshift;     /* shift minute start */

int commsock;

int answerlen;

int debugging;

char ipbuf[64];

char nodeipbuf[MAX_LINELEN+1];

char commbuf[BUFFERLEN+1];

#define textbuf (commbuf+sizeof(int))

char *textptr;

int cwdtype;

/* check whether there is anything to execute */

void logexec(void)

{

    struct stat st;

    pid_t pid;

    if(stat("log/wimslogd.exec",&st)) return;

    fflush(NULL);

    pid=fork(); if(pid>0) {addfork(pid,1); return;}

    close(commsock); msleep(100);

    call_ssh(1,"sh log/wimslogd.exec >tmp/log/wimslogdexec.out 2>tmp/log/wimslogdexec.err");

    unlink("log/wimslogd.exec"); exit(0);

}

void local(void)

{

    struct stat st;

    if(stat("log/wimslogd.local",&st)) return;

    if(!(S_IXUSR&st.st_mode)) return;

    call_ssh(0,"sh log/wimslogd.local");

}

void getnow(void)

{

    nowtime=time(NULL); thismin=(nowtime-rshift)/MINLENGTH;

    now=localtime(&nowtime);

    nowsec=now->tm_sec;

    nowmin=now->tm_min; nowhr=now->tm_hour;

    nowday=now->tm_mday; nowwday=now->tm_wday;

    nowmon=now->tm_mon+1; nowyear=now->tm_year+1900;

    snprintf(nowstr,sizeof(nowstr),"%04d%02d%02d.%02d:%02d:%02d",

             nowyear,nowmon,nowday,nowhr,nowmin,nowsec);

}

void parms(void)

{

    char *p, *p1, *p2, *parm[16];

    char buf[16];

    int t,r;

    p=getenv("wimslogd");

    if(p==NULL || *p==0) return;

    for(t=0, p1=find_word_start(p); *p1; p1=find_word_start(p2)) {

        p2=find_word_end(p1); if(*p2) *p2++=0;

        parm[t++]=p1;

    }

    idle_time=atoi(parm[0]); if(idle_time<=10) idle_time=5000;

    idle_time2=atoi(parm[1]); if(idle_time2<=10) idle_time2=idle_time;

    idle_time3=atoi(parm[2]); if(idle_time3<=10) idle_time3=idle_time2;

    if(idle_time2>idle_time) idle_time2=idle_time;

    if(idle_time3>idle_time2) idle_time3=idle_time2;

    OLD_LOG_FILES=atoi(parm[3]);

    if(OLD_LOG_FILES>100) OLD_LOG_FILES=100;

    if(parm[4]) GEN_LOG_LIMIT=atoi(parm[4]);

    if(parm[5]) MODULE_LOG_LIMIT=atoi(parm[5]);

    if(parm[6]) backup_hour=atoi(parm[6]);

    if(parm[7]) site_accounting=atoi(parm[7]);

    if(parm[8]) r=atoi(parm[8])+1; else r=8;

    if(r<2) r=2; if(r>100) r=100;

    snprintf(buf,sizeof(buf),"%d",r); setenv("examlog_lim2",buf,1);

    if(site_accounting>0) setenv("site_accounting","yes",1);

}

/* This is run only when manually invoking the program.

 * Verifies the orderedness of various list tables.

 */

int verify_tables(void)

{

    if(verify_order(cmdlist,cmdcnt,sizeof(cmdlist[0]))) return -1;

    return 0;

}

int main(int argc, char *argv[])

{

    char *p;

    struct stat st;

    uid_t myid;

    int /*mfd,*/rsock,mincnt;

    char buf[MAX_LINELEN+1];

    forkcnt=0; exec_wait=1; mincnt=0;

    classcaches=sheetcaches=0;

    (void)freopen("/dev/null","r",stdin);

    (void)freopen("../tmp/log/wimslogd.out","w",stdout);

    (void)freopen("../tmp/log/wimslogd.err","w",stderr);

/*    mfd=shm_open(SHM_NAME,O_RDWR|O_CREAT|O_TRUNC,S_IRUSR|S_IWUSR);

    write(mfd,buf,SHM_SIZE);

    shmptr=mmap(0,SHM_SIZE,PROT_READ|PROT_WRITE,MAP_SHARED,mfd,0);

    if(shmptr==MAP_FAILED) {

        fprintf(stderr,"wimslogd: mmap() failure. %s\n",

                strerror(errno));

        exit(1);

    }

*/

    verify_tables();

    init_random();

    modupdatetime=(double) random()*350/RAND_MAX;

    rshift=(double) random()*MINLENGTH/RAND_MAX;

    parms();

    if(getcwd(cwd,sizeof(cwd))==NULL) { /* directory missing */

        fprintf(stderr,"wimslogd: getcwd() failure. %s\n",

                strerror(errno));

        return 1;

    }

    p=strstr(cwd,"/public_html");

    if(p!=NULL && *(p+strlen("/public_html"))==0) {

        *p=0; if(chdir(cwd)<0) {        /* strong error */

            fprintf(stderr,"wimslogd: Unable to change directory. %s\n",

                    strerror(errno));

            return 1;

        }

    }

    opensock();

    mypid=getpid();

    myid=geteuid(); setreuid(myid,myid);

    myid=getegid(); setregid(myid,myid);

    stat("/sysmask/notice/init-end",&st);

    snprintf(pidstr,sizeof(pidstr),"%u",mypid);

    getnow(); printf("wimslogd %s started at %s.\n",pidstr,nowstr);

    startdate=nowday;

    fflush(NULL);

    starttime=nowtime; startmin=lastmin=thismin;

    accessfile(qbuf,"r","log/cquota/lim.host");

    accessfile(buf,"r","log/myip"); mystrncpy(ipbuf,find_word_start(buf),sizeof(ipbuf));

    accessfile(buf,"r","tmp/log/wimslogd.relax"); /* if yes then it is a cluster child */

    if(strstr(buf,"yes")!=NULL) {       /* register my real IP */

        accessfile(nodeipbuf,"r","/etc/myip");

        accessfile(nodeipbuf,"w","tmp/log/myip");

    }

    do {

        fd_set rset;

        struct timeval tv;

        int t, selectcnt;

        if(getpid()!=mypid) return 0;   /* leaked child */

        if(stat(debugfile,&st)==0 && st.st_size<MAX_DEBUGLENGTH) debugging=1;

        else debugging=0;

        accessfile(loadavg,"r","/proc/loadavg");

        for(selectcnt=0; selectcnt<100; selectcnt++) {

            tv.tv_sec=0; tv.tv_usec=50000; /* a pause every 50 ms. */

            FD_ZERO(&rset); FD_SET(commsock,&rset);

            t=select(commsock+1,&rset,NULL,NULL,&tv);

            if(t==0) {forkman(0); continue;}

            if(t<0) {wimslogd_error("select() error."); continue;}

            rsock=accept(commsock,NULL,NULL);

            if(rsock==-1) {wimslogd_error("accept() error."); continue;}

            answer(rsock);

        }

        forkman(1);

        getnow();

        if(thismin==lastmin) continue;

        mincnt++; /* if(mincnt>MAX_MIN) return 0; Refreshment. */

        if(nowday!=startdate) return 0; /* Daily refreshment. */

        lastmin=thismin;

        accessfile(buf,"r",pidfile); strip_trailing_spaces(buf);

        if(strcmp(buf,pidstr)!=0) {     /* wrong pid: abandon. */

            wait_children();

            return 0;

        }

        if(getpid()!=mypid) return 0;   /* leaked child */

        accessfile(qbuf,"r","log/cquota/lim.host");

        accessfile(buf,"r","log/myip"); mystrncpy(ipbuf,find_word_start(buf),sizeof(ipbuf));

        cleancache();

        if((thismin%127)==6) homedir(); /* update home directory setup */

        accessfile(buf,"r","tmp/log/wimslogd.relax"); /* if yes then no housekeeping */

        if(strstr(buf,"yes")==NULL) {

            dispatch_log();

            if((thismin%2)==1) local();

            /* if((thismin%9)==0) */ cleaning(1);       /* clean up session directories */

            if((thismin%5)==0 && nowmin>15) housekeep();        /* daily housekeeping */

            if(getpid()!=mypid) return 0;       /* leaked child */

            if(nowhr*60+nowmin>modupdatetime && (thismin%17)==11) modupdate();

            if(backup_hour>0 && backup_hour<23 && (thismin%17)==3 && nowhr>=backup_hour)

              backup(); /* daily backup */

            fflush(NULL);

            logexec();

        }

        else {  /* cluster child */

            if((thismin%9)==0) cleaning(0);     /* clean up session directories */

        }

    }

    while(1==1);

    return 0;

}