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  1. /*    Copyright (C) 1998-2003 XIAO, Gang of Universite de Nice - Sophia Antipolis
  2.  *
  3.  *  This program is free software; you can redistribute it and/or modify
  4.  *  it under the terms of the GNU General Public License as published by
  5.  *  the Free Software Foundation; either version 2 of the License, or
  6.  *  (at your option) any later version.
  7.  *
  8.  *  This program is distributed in the hope that it will be useful,
  9.  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  10.  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11.  *  GNU General Public License for more details.
  12.  *
  13.  *  You should have received a copy of the GNU General Public License
  14.  *  along with this program; if not, write to the Free Software
  15.  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  16.  */
  17. /* Routines to write log files. */
  18. #include <sys/socket.h>
  19. #include <sys/un.h>
  20.  
  21. #include "wims.h"
  22.  
  23. char logbuf[4*(MAX_LINELEN+1)];
  24. char *logp=logbuf;
  25.  
  26. void write_logfile(char *fname, char *str)
  27. {
  28.     char *p;
  29.     if((p=strchr(str,'\n'))!=NULL) *p=0;
  30.     snprintf(logp,sizeof(logbuf)-(logp-logbuf),"%s %s\n",fname,str);
  31.     logp+=strlen(logp);
  32. }
  33.  
  34. void flushlog(void)
  35. {
  36.     int n, fd;
  37.     n=logp-logbuf; logp=logbuf;
  38.     if(n<=0) return;
  39.     fd=open(temp_log,O_WRONLY|O_APPEND|O_CREAT,S_IRUSR|S_IWUSR);
  40.     if(fd==-1) return;
  41.     (void)write(fd,logbuf,n); close(fd);
  42. }
  43.  
  44. /* Write module log file. */
  45. void module_log(void)
  46. {
  47.     /* log string is limited to 100 characters. */
  48.     char *logstr, *ip, *sess, lbuf[100], *p;
  49.  
  50.     if(robot_access || !modlog || strstr(session_prefix,"_check")!=NULL) return;
  51.     logstr=getvar("wims_module_log");
  52.     if(logstr==NULL || *logstr==0) return;
  53.     ip=remote_addr;
  54.     if(mode==mode_default) sess=getvar("wims_session");
  55.     else sess="popup";
  56.     if(ip==NULL || sess==NULL) return;
  57.     mystrncpy(lbuf,logstr,sizeof(lbuf));
  58.     p=strchr(sess,'_'); if(p==NULL) p=sess+strlen(sess);
  59.     if(p<sess+4) p=sess; else p=p-4;
  60.     snprintf(tmplbuf,sizeof(tmplbuf),"%s %.6s %s\11%s",
  61.      nowstr, p, ip, lbuf);
  62.     p=getvar(ro_name[ro_module]);
  63.     if(p==NULL || *p==0) return;
  64.     write_logfile(mkfname(NULL,"%s/%s",module_dir,p),tmplbuf);
  65. }
  66.  
  67. /* log http referers */
  68. void referer_log(void)
  69. {
  70.     char *c,*s,*ip,*r,*h,refstr[256];
  71.  
  72.     if(robot_access) return;
  73.     c=getvar(ro_name[ro_cmd]);
  74.     if(c==NULL) c="";
  75.     if(mode==mode_default) s=getvar("wims_session"); else s="popup";
  76.     if(s==NULL) s="----";
  77.     else if(!new_session && strcmp(c,"intro")!=0) return;
  78.     if(strlen(s)<4) s="----";
  79.     if(strchr(s,'_')!=NULL) return;
  80.     ip=remote_addr; if(*ip==0) return;
  81.     r=getenv("HTTP_REFERER");
  82.     if(r==NULL || *r==0) r="??";
  83.     /* skip some useless referers */
  84.     else {
  85.       if(strstr(r,cgi_name)!=NULL) return;
  86.       if(strstr(r,"file:")!=NULL || strchr(r,'.')==NULL) r="??";
  87.       if(strstr(r,"http")==NULL && strchr(r,'.')==NULL &&
  88.        strstr(r,"bookmark")!=NULL) r="??bookmark";
  89.     }
  90.     if(strncmp(r,"http://",strlen("http://"))==0) r+=strlen("http://");
  91.     /* Take references from the same site or not? No. */
  92.     h=getenv("HTTP_HOST");
  93.     if(h!=NULL && *h!=0 && strncmp(r,h,strlen(h))==0) return;
  94.         /* stop before '#' */
  95.     mystrncpy(refstr,r,sizeof(refstr));
  96.     r=strchr(refstr,'#'); if(r!=NULL) *r=0;
  97.     for(r=refstr;r<refstr+strlen(refstr);r++) {
  98.       if(*r=='%' && *(r+1)=='7' && *(r+2)=='E') {
  99.         *r='~'; ovlstrcpy(r+1,r+3);
  100.       }
  101.     }
  102.     snprintf(tmplbuf,sizeof(tmplbuf),"%s %s %s\11%s",
  103.          nowstr,s+strlen(s)-4,ip,refstr);
  104.     write_logfile("referer.log",tmplbuf);
  105. }
  106.  
  107. /* Log new creation of sessions. For server counting use. */
  108. void session_log(char *c)
  109. {
  110.     int i;
  111.     char *ip, *p, *agent, *s, *sess;
  112.  
  113.     ip=remote_addr; if(*ip==0) return;
  114.     if(mode==mode_default) {
  115.       sess=getvar("wims_session");
  116.       if(sess==NULL) return;
  117.       if(strchr(sess,'_')!=NULL) return;
  118.     }
  119.     else sess="popup";
  120.     p=getenv("REMOTE_HOST"); if(p==NULL) p="";
  121.     i=strlen(p); if(i>40) p+=i-40;
  122.     agent=getenv("HTTP_USER_AGENT"); if(agent==NULL) agent="";
  123.     s=strchr(sess,'_'); if(s==NULL) s=sess+strlen(sess);
  124.     if(s<sess+4) s=sess; else s=s-4;
  125.       /* limit agent name to 80 chars */
  126.     snprintf(tmplbuf,sizeof(tmplbuf),"%s %s %s\11%s\11%.80s",
  127.          nowstr, s, ip, p, agent);
  128.     write_logfile("session.log",tmplbuf);
  129. }
  130.  
  131. /* Log user information. */
  132. void user_log(char *c)
  133. {
  134.     char fname[MAX_FNAME+1], logbuf[MAX_LINELEN+1], cbuf[256], sbuf[32], shbuf[32];
  135.     char *user, *classe, *sh, *sess, *exo, *cc, *ip, *allow, *pend;
  136.     char *ex;
  137.     double sc,Sc;
  138.     int i, scorelog;
  139.  
  140.     if(robot_access || strstr("session_prefix","_check")!=NULL) return;
  141.     user=getvar("wims_user"); classe=getvar("wims_class");
  142.     sc=0;
  143.     if(isexam) {
  144.       if(user==NULL || classe==NULL || *user==0 || *classe==0) return;
  145.       sh=getvar("worksheet"); if(sh==NULL) return;
  146.       mystrncpy(shbuf,sh,sizeof(shbuf));
  147.       exo=strchr(shbuf,'.'); if(exo==NULL) return;
  148.       *exo++=0; sh=shbuf;
  149.       if(mode==mode_default) sess=getvar("wims_session");
  150.       else sess="popup";
  151.       if(sess==NULL) return;
  152.       mystrncpy(sbuf,sess,sizeof(sbuf));
  153.       sess=strchr(sbuf,'_'); if(sess==NULL) return;
  154.       *sess=0; sess=sbuf; ex="E";
  155.       accessfile(logbuf,"r","%s/.E%s",class_dir,sh);
  156.       if(strchr(logbuf,'#')!=NULL || strcmp(user,"supervisor")==0) simuxam=1;
  157.       else {
  158.         accessfile(logbuf,"r","%s/%s/examsimu.%d", session_dir,sess,sh);
  159.         if(strstr(logbuf,"yes")!=NULL) user_error("expired_exam");
  160.       }
  161.       mkfname(examlogd,"%s/examlog/%s/%s",class_dir,user,sess);
  162.       mkfname(examlogf,"%s/%s.%s",examlogd,sh,exo);
  163.     }
  164.     else {
  165.      sh=getvar("wims_sheet");
  166.      if(sh==NULL || *sh==0) return;
  167.      exo=getvar("wims_exo"); if(exo==NULL) return;
  168.      sess=getvar("wims_session");
  169.      if(sess==NULL) return;
  170.      ex="";
  171.  
  172.     }
  173.     if(strcmp(c,"new")!=0 && strcmp(c,"renew")!=0
  174.        && strcmp(c,"rafale")!=0
  175.        && strcmp(c,"hint")!=0 && parm_restore==0) {
  176.        char *s;
  177.        s=getvar("module_score");
  178.        if(s==NULL || *s==0) return;
  179.        sc=atof(s); if(!isfinite(sc)) {sc=0; return;}
  180.        snprintf(cbuf,sizeof(cbuf),"score %s",s);
  181.        cc=cbuf;
  182.     }
  183.     else cc=c;
  184.     if(classe==NULL || *classe==0) i=1;
  185.     else i=getscorestatus(classe,atoi(sh));
  186.     pend=getvar("wims_scoring"); if(pend==NULL) pend="";
  187.     if((i==0 || !exodepOK || strcmp(pend,"pending")!=0) && strcmp(cc,"rafale")!=0)
  188.       allow="   noscore";
  189.     else allow="";
  190.     ip=remote_addr; if(*ip==0) ip="-"; scorelog=0;
  191.     if(user==NULL || *user==0) {
  192.        classe="0"; allow="";
  193.        mkfname(fname,"../sessions/%s/.score",sess);
  194.     }
  195.     else {
  196.      char *pp;
  197.      if(classe==NULL || *classe==0) return;
  198.      pp=getvar("wims_scorereg");
  199.      if((allow[0]==0 || (pp!=NULL && strcmp(pp,"suspend")==0)) && *ex!='E')
  200.        scorelog=1;
  201.      else
  202.        mkfname(fname,"classes/%s/noscore/%s",classe,user);
  203.     }
  204.     if(isexam && user!=NULL && *user!=0) {
  205.      allow=exam_sheetexo;
  206.      snprintf(logbuf,sizeof(logbuf),":%s %2s %s         %s%s\n",
  207.         nowstr,exo,cc,ip,allow);
  208.      accessfile(logbuf,"a","%s/%s/examscore.%s", session_dir,sess,sh);
  209.      Sc=currexamscore(atoi(sh));
  210.      accessfile(logbuf,"r","%s/.E%s",class_dir,sh);
  211.      if(simuxam==0) {     /* not simulation */
  212.          if(sc>0) {
  213.           snprintf(logbuf,sizeof(logbuf),
  214.                 "%s %.5f -1 %u %s %s\n",
  215.                 sh,Sc,(unsigned int) nowtime,ip,sess);
  216.           accessfile(logbuf,"a","%s/score/%s.exam",
  217.                   class_dir,user);
  218.          }
  219.      }
  220.      else snprintf(exam_sheetexo+strlen(exam_sheetexo),
  221.                 sizeof(exam_sheetexo)-strlen(exam_sheetexo),
  222.                 "       S");
  223.     }
  224.     snprintf(logbuf,sizeof(logbuf),"%s%s %s %2s %2s %s          %s%s",
  225.           ex,nowstr,sess,sh,exo,cc,ip,allow);
  226.     if(scorelog) {
  227.       snprintf(tmplbuf,sizeof(tmplbuf),"-c%s -u%s scorelog %s",
  228.            classe,user,logbuf);
  229.      _daemoncmd(tmplbuf);
  230.     }
  231.     else write_logfile(fname,logbuf);
  232. }
  233.  
  234. /* Log class information. */
  235. void class_log(char *cl, char *l, char *ip)
  236. {
  237.     char logbuf[1024];
  238.  
  239.     if(robot_access) return;
  240.     snprintf(logbuf,sizeof(logbuf),"%s %s       %s",
  241.           nowstr,ip,l);
  242.     write_logfile(mkfname(NULL,"classes/%s/.log",cl),logbuf);
  243. }
  244.  
  245. /* Log accesses to modules. For server counting use. */
  246. void access_log(char *c)
  247. {
  248.     int i;
  249.     char *ip, *p, *sess, *s, *agent, *u, *cl;
  250.     time_t logtime;
  251.     char ag[128], tm[64];
  252.  
  253.     ip=remote_addr;
  254.     if(*ip==0) ip="????????";
  255.     if(mode==mode_default) sess=getvar("wims_session");
  256.     else sess="popup";
  257.     if(sess==NULL) sess="----------";
  258.     p=getvar(ro_name[ro_module]);
  259.     if(p==NULL || *p==0) p="-";
  260. /* limit module name to 40 chars */
  261.     i=strlen(p); if(i>40) p+=i-40;
  262.     if(robot_access) {
  263.      agent=getenv("HTTP_USER_AGENT"); if(agent==NULL) agent="-";
  264.      snprintf(ag,sizeof(ag)," %s",agent);
  265.     }
  266.     else {
  267.      u=getvar("wims_user");
  268.      if(u!=NULL && *u!=0) snprintf(ag,sizeof(ag)," %s,%s",u,getvar("wims_class"));
  269.      else ag[0]=0;
  270.     }
  271.     s=strchr(sess,'_'); if(s==NULL) s=sess+strlen(sess);
  272.     if(s<sess+4) s=sess; else s=s-4;
  273.     tm[0]=0; logtime=time(0); if(logtime>nowtime+2) {
  274.      snprintf(tm,sizeof(tm)," (%lus)", logtime-nowtime);
  275.     }
  276.     snprintf(tmplbuf,sizeof(tmplbuf),"%s %.6s %s\11%s\11%s%s%s",
  277.           nowstr, s, ip, c, p, tm, ag);
  278.     write_logfile("access.log",tmplbuf);
  279.     user_log(c);
  280.     cl=getvar("wims_class");
  281.     if(cl!=NULL && *cl!=0) {
  282.      char *l;
  283.      l=getvar("wims_class_log");
  284.      if(l!=NULL && *l!=0) class_log(cl, l, ip);
  285.     }
  286. }
  287.  
  288. /* Log of mails. */
  289. void mail_log(char *c)
  290. {
  291.     int i;
  292.     char *ip, *p, *sess, *s, *cl;
  293.  
  294.     ip=remote_addr;
  295.     if(*ip==0) ip="????????";
  296.     if(mode==mode_default) sess=getvar("wims_session");
  297.     else sess="popup";
  298.     if(sess==NULL) sess="----------";
  299.     p=getvar(ro_name[ro_module]);
  300.     if(p==NULL || *p==0) p="-";
  301. /* limit module name to 40 chars */
  302.     i=strlen(p); if(i>40) p+=i-40;
  303.     s=strchr(sess,'_'); if(s==NULL) s=sess+strlen(sess);
  304.     if(s<sess+4) s=sess; else s=s-4;
  305.     cl=getvar("wims_class"); if(cl==NULL) cl="";
  306.     snprintf(tmplbuf,sizeof(tmplbuf),"%s %.6s %s\11%s\11%s\11%s",
  307.           nowstr, s, ip, c, cl, p);
  308.     write_logfile("mail.log",tmplbuf);
  309. }
  310.  
  311. /* log posted data */
  312. void post_log(void)
  313. {
  314.     char *h, *l, logstr[2*MAX_LINELEN+2];
  315.     char *authpwd, *p, *ll, *l1 ;
  316.  
  317.     h=remote_addr;
  318.     if(mpboundary[0]!=0) l="multipart/form-data"; else l=stdinbuf;
  319.  
  320.     ll=strdup(l);
  321.     authpwd="auth_password=";
  322.     if((p=strstr(l,authpwd))!=NULL ) {
  323.       l1=strdup(l);
  324.       mystrncpy(ll,l,p-l+strlen(authpwd)+1);
  325.       strcat(ll,"xxxx");
  326.       mystrncpy(l1,p+strlen(authpwd),strlen(l));
  327.       if((p=strstr(l1,"&"))!=NULL) strcat(ll,p);
  328.     }
  329.  
  330.     snprintf(logstr,sizeof(logstr),"%s %s       %s",
  331.          nowstr, h, ll);
  332.     write_logfile("post.log",logstr);
  333. }
  334.  
  335. /* It is this routine which is called by main(). */
  336. void write_logs(void)
  337. {
  338.     char *p;
  339.     p=getvar(ro_name[ro_cmd]); if(p==NULL || *p==0) p="no_cmd";
  340.     access_log(p); if(strstr(session_prefix,"_check")!=NULL) return;
  341.     module_log(); referer_log();
  342.     if(new_session) session_log(p);
  343. }
  344.  
  345. void user_error_log(char msg[])
  346. {
  347.     char *s, *m, *c, *h, *q, *r, *sess, logstr[512];
  348.     if(mode==mode_default) sess=getvar("wims_session");
  349.     else sess="popup";
  350.     if(sess==NULL) sess="----------";
  351.     m=getvar(ro_name[ro_module]);if(m==NULL) m="";
  352.     c=getvar(ro_name[ro_cmd]);if(c==NULL) c="";
  353.     h=remote_addr;
  354.     q=getenv("QUERY_STRING");if(q==NULL) q="";
  355.     r=getenv("HTTP_REFERER");
  356.     if(r==NULL || strstr(r,cgi_name)!=NULL) r="";
  357.     s=strchr(sess,'_'); if(s==NULL) s=sess+strlen(sess);
  358.     if(s<sess+4) s=sess; else s=s-4;
  359.     snprintf(logstr,sizeof(logstr),"%s %.5s %s %s, module=%s cmd=%s: %s %s",
  360.          nowstr, s, h, msg, m, c, r, q);
  361.     write_logfile("user_error.log",logstr);
  362.     if(user_error_nolog) return;
  363.     access_log("user_error");referer_log();
  364. }
  365.  
  366. void module_error_log(char msg[])
  367. {
  368.     char *s, *m, *c, logstr[256];
  369.     if(strstr(msg,"debug")!=NULL || strstr(msg,"timeup")!=NULL) return;
  370.     if(strstr(m_file.name,"sessions/")!=NULL) return;
  371.     s=getvar(ro_name[ro_module]);
  372.     if(s!=NULL) {
  373.      if(strncmp(s,"classes/",strlen("classes/"))==0 ||
  374.         strncmp(s,"devel/",strlen("devel/"))==0) return;
  375.     }
  376.     s=getvar("wims_session"); if(s==NULL) s="    ";
  377.     m=getvar(ro_name[ro_module]);if(m==NULL) m="";
  378.     c=getvar(ro_name[ro_cmd]);if(c==NULL) c="";
  379.     snprintf(logstr,sizeof(logstr),"%s %.10s %s in %s/%s, line %d",
  380.          nowstr, s+2, msg, m, m_file.name, m_file.l+1);
  381.     write_logfile("module_error.log",logstr);
  382.     access_log("module_error");
  383. }
  384.  
  385. /* Refused users due to threshold excess */
  386. void refuse_log(int th)
  387. {
  388.     char *load, *h;
  389.  
  390.     load=getvar("wims_server_load"); if(load==NULL) load="??";
  391.     h=remote_addr;
  392.     snprintf(tmplbuf,sizeof(tmplbuf),"%s %s\11%d:%s",
  393.           nowstr, h, th, load);
  394.     write_logfile("refuse.log",tmplbuf);
  395. }
  396.  
  397. #define logdpid "../tmp/log/wimslogd.pid"
  398. #define newlogd "../tmp/log/wimslogd.new"
  399.  
  400. void bringuplogd(void)
  401. {
  402.     char *arg[]={"../bin/wimslogd",NULL};
  403.     struct stat st;
  404.     pid_t pid;
  405.  
  406. /* need to update wimslogd? */
  407.     if(stat(newlogd,&st)==0) {
  408.      if((S_IXUSR&st.st_mode)!=0 && st.st_size>40000 && st.st_size<200000)
  409.        call_ssh("mv %s %s",newlogd,arg[0]);
  410.      else call_ssh("rm -f %s",newlogd);
  411.     }
  412.     pid=fork(); if(pid) return;     /* parent */
  413. /* double fork to escape sysmask orphan. */
  414.     pid=fork(); if(pid) {     /* secondary parent */
  415.      snprintf(tmplbuf,sizeof(tmplbuf),"%u",pid);
  416.      mkdirs("../tmp/log");
  417.      chmod("../tmp/log",S_IRUSR|S_IWUSR|S_IXUSR);
  418.      accessfile(tmplbuf,"w",logdpid);
  419.      exit(0);
  420.     }
  421.     setreuid(geteuid(),geteuid());setregid(getegid(),getegid());
  422.     snprintf(tmplbuf,sizeof(tmplbuf),"%u %u %u %u %u %u %d %d %d",
  423.           idle_time,idle_time2,idle_time3,
  424.           OLD_LOG_FILES,GEN_LOG_LIMIT,
  425.           MODULE_LOG_LIMIT,backup_hour,site_accounting,
  426.           examlog_limit);
  427.  
  428.     setenv("wimslogd",tmplbuf,1);
  429.     execve(arg[0],arg,environ);
  430.     fprintf(stderr,"Unable to execute wimslogd: %s\n",strerror(errno));
  431.     exit(1);
  432. }
  433.  
  434. void checklogd(void)
  435. {
  436.     int i,t;
  437.     char *p1, *p2, *p, buf[MAX_LINELEN+1];
  438.     sun.sun_family=PF_UNIX;
  439.     snprintf(sun.sun_path,sizeof(sun.sun_path),"%s",ksockfile);
  440.     p=getenv("REMOTE_ADDR"); if(p==NULL) p="";
  441.     snprintf(buf+sizeof(int),sizeof(buf)-sizeof(int),"ping %s",p);
  442.     t=kerneld(buf,sizeof(buf)); if(t<0) {
  443.      bringuplogd();
  444.      for(i=0; i<10 && t<0; i++) {
  445.          msleep(100);
  446.          snprintf(buf+sizeof(int),sizeof(buf)-sizeof(int),"ping %s",p);
  447.          t=kerneld(buf,sizeof(buf));
  448.      }
  449.     }
  450.     if(t<0) internal_error("Unable to bring up wimslogd.");
  451.     p1=find_word_start(buf+sizeof(int)); p2=find_word_end(p1);
  452.     if(*p2) *p2++=0;
  453.     if(strcmp(p1,"OK")!=0) internal_error("wimslogd error.");
  454.     if(*p2=='1') hostcquota=1; else hostcquota=0;
  455.     p1=find_word_start(find_word_end(p2));
  456.     p2=strchr(p1,'\n'); if(p2) *p2++=0; else p2=p1+strlen(p1);
  457.     mystrncpy(loadavg,p1,sizeof(loadavg));
  458.     p2=find_word_start(p2);
  459.     p1=find_word_end(p2); if(*p1) *p1++=0;
  460.  
  461.     p=getenv("SERVER_ADDR");
  462.     if(*p2!=0 && memcmp(p,"10.",3)==0) p=p2;
  463.     if(p!=NULL) {
  464.      i=strlen(cookieheader);
  465.      snprintf(cookieheader+i, sizeof(cookieheader)-i,"%s/",p);
  466.     }
  467.     p=getenv("HTTP_COOKIE"); cookiegot[0]=0;
  468.     if(p!=NULL && (p2=strstr(p,cookieheader))!=NULL) {
  469.      mystrncpy(cookiegot,find_word_start(p+strlen(cookieheader)),sizeof(cookiegot));
  470.      *find_word_end(cookiegot)=0;
  471.     }
  472. }
  473.