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.

 */

/* Routines to write log files. */

#include <sys/socket.h>

#include <sys/un.h>

#include "wims.h"

char logbuf[4*(MAX_LINELEN+1)];

char *logp=logbuf;

void write_logfile(char *fname, char *str)

{

    char *p;

    if((p=strchr(str,'\n'))!=NULL) *p=0;

    snprintf(logp,sizeof(logbuf)-(logp-logbuf),"%s %s\n",fname,str);

    logp+=strlen(logp);

}

void flushlog(void)

{

    int n, fd;

    n=logp-logbuf; logp=logbuf;

    if(n<=0) return;

    fd=open(temp_log,O_WRONLY|O_APPEND|O_CREAT,S_IRUSR|S_IWUSR);

    if(fd==-1) return;

    (void)write(fd,logbuf,n); close(fd);

}

/* Write module log file. */

void module_log(void)

{

    /* log string is limited to 100 characters. */

    char *logstr, *ip, *sess, lbuf[100], *p;

    if(robot_access || !modlog || strstr(session_prefix,"_check")!=NULL) return;

    logstr=getvar("wims_module_log");

    if(logstr==NULL || *logstr==0) return;

    ip=remote_addr;

    if(mode==mode_default) sess=getvar("wims_session");

    else sess="popup";

    if(ip==NULL || sess==NULL) return;

    mystrncpy(lbuf,logstr,sizeof(lbuf));

    p=strchr(sess,'_'); if(p==NULL) p=sess+strlen(sess);

    if(p<sess+4) p=sess; else p=p-4;

    snprintf(tmplbuf,sizeof(tmplbuf),"%s %.6s %s\11%s",

     nowstr, p, ip, lbuf);

    p=getvar(ro_name[ro_module]);

    if(p==NULL || *p==0) return;

    write_logfile(mkfname(NULL,"%s/%s",module_dir,p),tmplbuf);

}

/* log http referers */

void referer_log(void)

{

    char *c,*s,*ip,*r,*h,refstr[256];

    if(robot_access) return;

    c=getvar(ro_name[ro_cmd]);

    if(c==NULL) c="";

    if(mode==mode_default) s=getvar("wims_session"); else s="popup";

    if(s==NULL) s="----";

    else if(!new_session && strcmp(c,"intro")!=0) return;

    if(strlen(s)<4) s="----";

    if(strchr(s,'_')!=NULL) return;

    ip=remote_addr; if(*ip==0) return;

    r=getenv("HTTP_REFERER");

    if(r==NULL || *r==0) r="??";

    /* skip some useless referers */

    else {

      if(strstr(r,cgi_name)!=NULL) return;

      if(strstr(r,"file:")!=NULL || strchr(r,'.')==NULL) r="??";

      if(strstr(r,"http")==NULL && strchr(r,'.')==NULL &&

       strstr(r,"bookmark")!=NULL) r="??bookmark";

    }

    if(strncmp(r,"http://",strlen("http://"))==0) r+=strlen("http://");

    /* Take references from the same site or not? No. */

    h=getenv("HTTP_HOST");

    if(h!=NULL && *h!=0 && strncmp(r,h,strlen(h))==0) return;

        /* stop before '#' */

    mystrncpy(refstr,r,sizeof(refstr));

    r=strchr(refstr,'#'); if(r!=NULL) *r=0;

    for(r=refstr;r<refstr+strlen(refstr);r++) {

      if(*r=='%' && *(r+1)=='7' && *(r+2)=='E') {

        *r='~'; ovlstrcpy(r+1,r+3);

      }

    }

    snprintf(tmplbuf,sizeof(tmplbuf),"%s %s %s\11%s",

         nowstr,s+strlen(s)-4,ip,refstr);

    write_logfile("referer.log",tmplbuf);

}

/* Log new creation of sessions. For server counting use. */

void session_log(char *c)

{

    int i;

    char *ip, *p, *agent, *s, *sess;

    ip=remote_addr; if(*ip==0) return;

    if(mode==mode_default) {

      sess=getvar("wims_session");

      if(sess==NULL) return;

      if(strchr(sess,'_')!=NULL) return;

    }

    else sess="popup";

    p=getenv("REMOTE_HOST"); if(p==NULL) p="";

    i=strlen(p); if(i>40) p+=i-40;

    agent=getenv("HTTP_USER_AGENT"); if(agent==NULL) agent="";

    s=strchr(sess,'_'); if(s==NULL) s=sess+strlen(sess);

    if(s<sess+4) s=sess; else s=s-4;

      /* limit agent name to 80 chars */

    snprintf(tmplbuf,sizeof(tmplbuf),"%s %s %s\11%s\11%.80s",

         nowstr, s, ip, p, agent);

    write_logfile("session.log",tmplbuf);

}

/* Log user information. */

void user_log(char *c)

{

    char fname[MAX_FNAME+1], logbuf[MAX_LINELEN+1], cbuf[256], sbuf[32], shbuf[32];

    char *user, *classe, *sh, *sess, *exo, *cc, *ip, *allow, *pend;

    char *ex;

    double sc,Sc;

    int i, scorelog;

    if(robot_access || strstr("session_prefix","_check")!=NULL) return;

    user=getvar("wims_user"); classe=getvar("wims_class");

    sc=0;

    if(isexam) {

      if(user==NULL || classe==NULL || *user==0 || *classe==0) return;

      sh=getvar("worksheet"); if(sh==NULL) return;

      mystrncpy(shbuf,sh,sizeof(shbuf));

      exo=strchr(shbuf,'.'); if(exo==NULL) return;

      *exo++=0; sh=shbuf;

      if(mode==mode_default) sess=getvar("wims_session");

      else sess="popup";

      if(sess==NULL) return;

      mystrncpy(sbuf,sess,sizeof(sbuf));

      sess=strchr(sbuf,'_'); if(sess==NULL) return;

      *sess=0; sess=sbuf; ex="E";

      accessfile(logbuf,"r","%s/.E%s",class_dir,sh);

      if(strchr(logbuf,'#')!=NULL || strcmp(user,"supervisor")==0) simuxam=1;

      else {

        accessfile(logbuf,"r","%s/%s/examsimu.%d", session_dir,sess,sh);

        if(strstr(logbuf,"yes")!=NULL) user_error("expired_exam");

      }

      mkfname(examlogd,"%s/examlog/%s/%s",class_dir,user,sess);

      mkfname(examlogf,"%s/%s.%s",examlogd,sh,exo);

    }

    else {

     sh=getvar("wims_sheet");

     if(sh==NULL || *sh==0) return;

     exo=getvar("wims_exo"); if(exo==NULL) return;

     sess=getvar("wims_session");

     if(sess==NULL) return;

     ex="";

    }

    if(strcmp(c,"new")!=0 && strcmp(c,"renew")!=0

       && strcmp(c,"rafale")!=0

       && strcmp(c,"hint")!=0 && parm_restore==0) {

       char *s;

       s=getvar("module_score");

       if(s==NULL || *s==0) return;

       sc=atof(s); if(!isfinite(sc)) {sc=0; return;}

       snprintf(cbuf,sizeof(cbuf),"score %s",s);

       cc=cbuf;

    }

    else cc=c;

    if(classe==NULL || *classe==0) i=1;

    else i=getscorestatus(classe,atoi(sh));

    pend=getvar("wims_scoring"); if(pend==NULL) pend="";

    if((i==0 || !exodepOK || strcmp(pend,"pending")!=0) && strcmp(cc,"rafale")!=0)

      allow="\tnoscore";

    else allow="\t";

    ip=remote_addr; if(*ip==0) ip="-"; scorelog=0;

    if(user==NULL || *user==0) {

       classe="0"; allow="";

       mkfname(fname,"../sessions/%s/.score",sess);

    }

    else {

     char *pp;

     if(classe==NULL || *classe==0) return;

     pp=getvar("wims_scorereg");

     if((allow[0]==0 || (pp!=NULL && strcmp(pp,"suspend")==0)) && *ex!='E')

       scorelog=1;

     else

       mkfname(fname,"classes/%s/noscore/%s",classe,user);

    }

    if(isexam && user!=NULL && *user!=0) {

     allow=exam_sheetexo;

     snprintf(logbuf,sizeof(logbuf),":%s %2s %s  \t%s%s\n",

        nowstr,exo,cc,ip,allow);

     accessfile(logbuf,"a","%s/%s/examscore.%s", session_dir,sess,sh);

     Sc=currexamscore(atoi(sh));

     accessfile(logbuf,"r","%s/.E%s",class_dir,sh);

     if(simuxam==0) {     /* not simulation */

         if(sc>0) {

          snprintf(logbuf,sizeof(logbuf),

                "%s %.5f -1 %u %s %s\n",

                sh,Sc,(unsigned int) nowtime,ip,sess);

          accessfile(logbuf,"a","%s/score/%s.exam",

                  class_dir,user);

         }

     }

     else snprintf(exam_sheetexo+strlen(exam_sheetexo),

                sizeof(exam_sheetexo)-strlen(exam_sheetexo),

                "\tS");

    }

    snprintf(logbuf,sizeof(logbuf),"%s%s %s %2s %2s %s  \t%s%s",

          ex,nowstr,sess,sh,exo,cc,ip,allow);

    if(scorelog) {

      snprintf(tmplbuf,sizeof(tmplbuf),"-c%s -u%s scorelog %s",

           classe,user,logbuf);

     _daemoncmd(tmplbuf);

    }

    else write_logfile(fname,logbuf);

}

/* Log class information. */

void class_log(char *cl, char *l, char *ip)

{

    char logbuf[1024];

    if(robot_access) return;

    snprintf(logbuf,sizeof(logbuf),"%s %s   \t%s",

          nowstr,ip,l);

    write_logfile(mkfname(NULL,"classes/%s/.log",cl),logbuf);

}

/* Log accesses to modules. For server counting use. */

void access_log(char *c)

{

    int i;

    char *ip, *p, *sess, *s, *agent, *u, *cl;

    time_t logtime;

    char ag[128], tm[64];

    ip=remote_addr;

    if(*ip==0) ip="????????";

    if(mode==mode_default) sess=getvar("wims_session");

    else sess="popup";

    if(sess==NULL) sess="----------";

    p=getvar(ro_name[ro_module]);

    if(p==NULL || *p==0) p="-";

/* limit module name to 40 chars */

    i=strlen(p); if(i>40) p+=i-40;

    if(robot_access) {

     agent=getenv("HTTP_USER_AGENT"); if(agent==NULL) agent="-";

     snprintf(ag,sizeof(ag)," %s",agent);

    }

    else {

     u=getvar("wims_user");

     if(u!=NULL && *u!=0) snprintf(ag,sizeof(ag)," %s,%s",u,getvar("wims_class"));

     else ag[0]=0;

    }

    s=strchr(sess,'_'); if(s==NULL) s=sess+strlen(sess);

    if(s<sess+4) s=sess; else s=s-4;

    tm[0]=0; logtime=time(0); if(logtime>nowtime+2) {

     snprintf(tm,sizeof(tm)," (%lus)", logtime-nowtime);

    }

    snprintf(tmplbuf,sizeof(tmplbuf),"%s %.6s %s\11%s\11%s%s%s",

          nowstr, s, ip, c, p, tm, ag);

    write_logfile("access.log",tmplbuf);

    user_log(c);

    cl=getvar("wims_class");

    if(cl!=NULL && *cl!=0) {

     char *l;

     l=getvar("wims_class_log");

     if(l!=NULL && *l!=0) class_log(cl, l, ip);

    }

}

/* Log of mails. */

void mail_log(char *c)

{

    int i;

    char *ip, *p, *sess, *s, *cl;

    ip=remote_addr;

    if(*ip==0) ip="????????";

    if(mode==mode_default) sess=getvar("wims_session");

    else sess="popup";

    if(sess==NULL) sess="----------";

    p=getvar(ro_name[ro_module]);

    if(p==NULL || *p==0) p="-";

/* limit module name to 40 chars */

    i=strlen(p); if(i>40) p+=i-40;

    s=strchr(sess,'_'); if(s==NULL) s=sess+strlen(sess);

    if(s<sess+4) s=sess; else s=s-4;

    cl=getvar("wims_class"); if(cl==NULL) cl="";

    snprintf(tmplbuf,sizeof(tmplbuf),"%s %.6s %s\11%s\11%s\11%s",

          nowstr, s, ip, c, cl, p);

    write_logfile("mail.log",tmplbuf);

}

/* log posted data */

void post_log(void)

{

    char *h, *l, logstr[2*MAX_LINELEN+2];

    char *authpwd, *p, *ll, *l1 ;

    h=remote_addr;

    if(mpboundary[0]!=0) l="multipart/form-data"; else l=stdinbuf;

    ll=strdup(l);

    authpwd="auth_password=";

    if((p=strstr(l,authpwd))!=NULL ) {

      l1=strdup(l);

      mystrncpy(ll,l,p-l+strlen(authpwd)+1);

      strcat(ll,"xxxx");

      mystrncpy(l1,p+strlen(authpwd),strlen(l));

      if((p=strstr(l1,"&"))!=NULL) strcat(ll,p);

    }

    snprintf(logstr,sizeof(logstr),"%s %s\t%s",

         nowstr, h, ll);

    write_logfile("post.log",logstr);

}

/* It is this routine which is called by main(). */

void write_logs(void)

{

    char *p;

    p=getvar(ro_name[ro_cmd]); if(p==NULL || *p==0) p="no_cmd";

    access_log(p); if(strstr(session_prefix,"_check")!=NULL) return;

    module_log(); referer_log();

    if(new_session) session_log(p);

}

void user_error_log(char msg[])

{

    char *s, *m, *c, *h, *q, *r, *sess, logstr[512];

    if(mode==mode_default) sess=getvar("wims_session");

    else sess="popup";

    if(sess==NULL) sess="----------";

    m=getvar(ro_name[ro_module]);if(m==NULL) m="";

    c=getvar(ro_name[ro_cmd]);if(c==NULL) c="";

    h=remote_addr;

    q=getenv("QUERY_STRING");if(q==NULL) q="";

    r=getenv("HTTP_REFERER");

    if(r==NULL || strstr(r,cgi_name)!=NULL) r="";

    s=strchr(sess,'_'); if(s==NULL) s=sess+strlen(sess);

    if(s<sess+4) s=sess; else s=s-4;

    snprintf(logstr,sizeof(logstr),"%s %.5s %s %s, module=%s cmd=%s: %s %s",

         nowstr, s, h, msg, m, c, r, q);

    write_logfile("user_error.log",logstr);

    if(user_error_nolog) return;

    access_log("user_error");referer_log();

}

void module_error_log(char msg[])

{

    char *s, *m, *c, logstr[256];

    if(strstr(msg,"debug")!=NULL || strstr(msg,"timeup")!=NULL) return;

    if(strstr(m_file.name,"sessions/")!=NULL) return;

    s=getvar(ro_name[ro_module]);

    if(s!=NULL) {

     if(strncmp(s,"classes/",strlen("classes/"))==0 ||

        strncmp(s,"devel/",strlen("devel/"))==0) return;

    }

    s=getvar("wims_session"); if(s==NULL) s="    ";

    m=getvar(ro_name[ro_module]);if(m==NULL) m="";

    c=getvar(ro_name[ro_cmd]);if(c==NULL) c="";

    snprintf(logstr,sizeof(logstr),"%s %.10s %s in %s/%s, line %d",

         nowstr, s+2, msg, m, m_file.name, m_file.l+1);

    write_logfile("module_error.log",logstr);

    access_log("module_error");

}

/* Refused users due to threshold excess */

void refuse_log(int th)

{

    char *load, *h;

    load=getvar("wims_server_load"); if(load==NULL) load="??";

    h=remote_addr;

    snprintf(tmplbuf,sizeof(tmplbuf),"%s %s\11%d:%s",

          nowstr, h, th, load);

    write_logfile("refuse.log",tmplbuf);

}

#define logdpid "../tmp/log/wimslogd.pid"

#define newlogd "../tmp/log/wimslogd.new"

void bringuplogd(void)

{

    char *arg[]={"../bin/wimslogd",NULL};

    struct stat st;

    pid_t pid;

/* need to update wimslogd? */

    if(stat(newlogd,&st)==0) {

     if((S_IXUSR&st.st_mode)!=0 && st.st_size>40000 && st.st_size<200000)

       call_ssh("mv %s %s",newlogd,arg[0]);

     else call_ssh("rm -f %s",newlogd);

    }

    pid=fork(); if(pid) return;     /* parent */

/* double fork to escape sysmask orphan. */

    pid=fork(); if(pid) {     /* secondary parent */

     snprintf(tmplbuf,sizeof(tmplbuf),"%u",pid);

     mkdirs("../tmp/log");

     chmod("../tmp/log",S_IRUSR|S_IWUSR|S_IXUSR);

     accessfile(tmplbuf,"w",logdpid);

     exit(0);

    }

    setreuid(geteuid(),geteuid());setregid(getegid(),getegid());

    snprintf(tmplbuf,sizeof(tmplbuf),"%u %u %u %u %u %u %d %d %d",

          idle_time,idle_time2,idle_time3,

          OLD_LOG_FILES,GEN_LOG_LIMIT,

          MODULE_LOG_LIMIT,backup_hour,site_accounting,

          examlog_limit);

    setenv("wimslogd",tmplbuf,1);

    execve(arg[0],arg,environ);

    fprintf(stderr,"Unable to execute wimslogd: %s\n",strerror(errno));

    exit(1);

}

void checklogd(void)

{

    int i,t;

    char *p1, *p2, *p, buf[MAX_LINELEN+1];

    sun.sun_family=PF_UNIX;

    snprintf(sun.sun_path,sizeof(sun.sun_path),"%s",ksockfile);

    p=getenv("REMOTE_ADDR"); if(p==NULL) p="";

    snprintf(buf+sizeof(int),sizeof(buf)-sizeof(int),"ping %s",p);

    t=kerneld(buf,sizeof(buf)); if(t<0) {

     bringuplogd();

     for(i=0; i<10 && t<0; i++) {

         msleep(100);

         snprintf(buf+sizeof(int),sizeof(buf)-sizeof(int),"ping %s",p);

         t=kerneld(buf,sizeof(buf));

     }

    }

    if(t<0) internal_error("Unable to bring up wimslogd.");

    p1=find_word_start(buf+sizeof(int)); p2=find_word_end(p1);

    if(*p2) *p2++=0;

    if(strcmp(p1,"OK")!=0) internal_error("wimslogd error.");

    if(*p2=='1') hostcquota=1; else hostcquota=0;

    p1=find_word_start(find_word_end(p2));

    p2=strchr(p1,'\n'); if(p2) *p2++=0; else p2=p1+strlen(p1);

    mystrncpy(loadavg,p1,sizeof(loadavg));

    p2=find_word_start(p2);

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

    p=getenv("SERVER_ADDR");

    if(*p2!=0 && memcmp(p,"10.",3)==0) p=p2;

    if(p!=NULL) {

     i=strlen(cookieheader);

     snprintf(cookieheader+i, sizeof(cookieheader)-i,"%s/",p);

    }

    p=getenv("HTTP_COOKIE"); cookiegot[0]=0;

    if(p!=NULL && (p2=strstr(p,cookieheader))!=NULL) {

     mystrncpy(cookiegot,find_word_start(p+strlen(cookieheader)),sizeof(cookiegot));

     *find_word_end(cookiegot)=0;

    }

}