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, *se;

  char *ex;

  double sc,Sc;

  int i, scorelog, testmax;

  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));

  testmax=gettrycheck(classe,user,atoi(sh),atoi(exo))==1;

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

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

    if(testmax) allow="maxtry noscore"; else allow="noscore";

  else allow="";

  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"); /* contains suspend or exotrymax */

    if((allow[0]==0 || i==1 || (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");

  }

  if(strcmp(c,"new")==0 || strcmp(c,"renew")==0)

    se=getvar("wims_seed"); else se="";

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

      ex,nowstr,sess,sh,exo,cc,ip,se,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 ;

  static char *obliterate[]={"auth_password=","passwd=","passsup=","password="};

  int i, oblicnt=sizeof(obliterate)/sizeof(char*);;

  h=remote_addr;

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

  ll=strdup(l);

  for(i=0;i<oblicnt;++i){

    authpwd=obliterate[i];

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

      l1=strdup(ll);

      mystrncpy(ll,l1,p-ll+strlen(authpwd)+1);

      strcat(ll,"xxxx");

      l1+=(p-ll)+strlen(authpwd);

      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);

  }

// don't change the order: use in Wimslogd/wimslogd.c in parms()

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

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

      idle_time,idle_time2,idle_time3,

      OLD_LOG_FILES,GEN_LOG_LIMIT,

      MODULE_LOG_LIMIT,backup_hour,site_accounting,

      examlog_limit,LOG_DELETE);

  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;

  }

}