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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.  
  18. /* This file contains a routine to do housekeeping:
  19.  * it erases obsolete session directories.
  20.  * Regular checkup every 10 minutes or so.
  21.  */
  22. #include "wimslogd.h"
  23.  
  24. /* internal */
  25. void _cleaning(char *di,int hardcheck)
  26. {
  27.     DIR *sdir_base;
  28.     struct dirent *ses;
  29.     struct stat session_stat;
  30.     char session_name[MAX_LINELEN+1];
  31.  
  32.     sdir_base=opendir(di);
  33.     if(sdir_base==NULL) return;
  34.     while((ses=readdir(sdir_base))!=NULL) {
  35.       if(ses->d_name[0]=='.') continue;
  36.       snprintf(session_name,sizeof(session_name),"%s/%s",
  37.              di,ses->d_name);
  38.       if(lstat(session_name,&session_stat)) {
  39.           wimslogd_error("wimslog cleaning(): session stat failure.");
  40.           return;
  41.       }
  42.       if(!S_ISDIR(session_stat.st_mode)) { /* not a directory: remove it. */
  43.           if(remove(session_name)<0) {
  44.             wimslogd_error("wimslogd cleaning(): unable to chase squatter file.");
  45.             return;
  46.           }
  47.       }
  48. /* remove idle session. */
  49.       else {
  50.           struct stat fst;
  51.           char fbuf[4096],cbuf[MAX_LINELEN+1];
  52.           char *pp;
  53.           if(session_stat.st_mtime<nowtime-idle_time ||
  54.              session_stat.st_mtime>nowtime+anti_time) {
  55.             remove:
  56.             if(remove_tree(session_name)!=0) {
  57.                 if(strstr(session_name,"chroot")!=NULL) {
  58.                   char tbuf[4096];
  59.                   snprintf(tbuf,sizeof(tbuf),"/%s",session_name);
  60.                   setenv("tmp_dir",tbuf,1);
  61.                   chmod(session_name,
  62.                         S_IRUSR|S_IWUSR|S_IXUSR|
  63.                         S_IRGRP|S_IWGRP|S_IXGRP|
  64.                         S_IROTH|S_IWOTH|S_IXOTH);
  65.                   (void)chdir("public_html");
  66.                   call_ssh(1,"bin/ch..root cleantmpdir");
  67.                   (void)chdir(cwd);
  68.                   chmod(session_name,S_IRUSR|S_IWUSR|S_IXUSR);
  69.                   fprintf(stderr,"%s\n",tbuf);
  70.                 }
  71.                 if(remove_tree(session_name)!=0) {
  72.                   fprintf(stderr,"Unable to remove session %s: %s.\n",
  73.                         session_name,strerror(errno));
  74.                 }
  75.             }
  76.             continue;
  77.           }
  78.           if(hardcheck==2) {
  79.             char dbuf[MAX_FNAME+1];
  80.             struct dirent *s2d;
  81.             struct stat fst;
  82.             int t;
  83.             DIR *s2D;
  84.             snprintf(dbuf,sizeof(dbuf),"%s/%s",sesd,ses->d_name);
  85.             if(ftest(dbuf)!=is_dir) goto remove;
  86.             s2D=opendir(session_name);
  87.             if(sdir_base==NULL) goto remove;
  88.             while((s2d=readdir(s2D))!=NULL) { /* remove individual files */
  89.                 snprintf(dbuf,sizeof(dbuf),"%s/%s",session_name,s2d->d_name);
  90.                 t=stat(dbuf,&fst);
  91.                 if(t==0 && fst.st_mtime<nowtime-INS_DELAY &&
  92.                    fst.st_mtime>=nowtime+anti_time) remove(dbuf);
  93.             }
  94.             closedir(s2D);
  95.             continue;
  96.           }
  97.           if(!hardcheck || strchr(session_name,'_')!=NULL) continue;
  98.           if(session_stat.st_mtime>=nowtime-idle_time3 &&
  99.              session_stat.st_mtime<nowtime+anti_time) continue;
  100.           snprintf(fbuf,sizeof(fbuf),"%s/var.stat",session_name);
  101.           if(stat(fbuf,&fst)==0) continue;
  102.           wlogdaccessfile(cbuf,"r","%s/var",session_name);
  103.           if(cbuf[0]==0) goto remove;      /* no var file */
  104.           pp=strstr(cbuf,"\nw_wims_ismanager=");
  105.           if(pp!=NULL) {
  106.             pp+=strlen("\nw_wims_ismanager=");
  107.             if(*pp>'0' && *pp<='9') continue;
  108.           }
  109.           if(session_stat.st_mtime<nowtime-idle_time2 ||
  110.              session_stat.st_mtime>nowtime+anti_time) goto remove;
  111.           if(session_stat.st_mtime<nowtime-idle_time3 &&
  112.              strstr(cbuf,"\nwims_new_session=yes\n")!=NULL) goto remove;
  113.             /* popup session: 50 sec only. */
  114.           if(session_stat.st_mtime<nowtime-50 &&
  115.              strstr(cbuf,"\nw_wims_mode=popup\n")!=NULL) goto remove;
  116.       }
  117.     }
  118.     closedir(sdir_base);
  119. }
  120.  
  121. /* Clean obsolete session directories. */
  122. void cleaning(int withmain)
  123. {
  124.     struct stat lastclean_stat;
  125.     pid_t pid;
  126.     char lastclean_name[MAX_FNAME+1];
  127.     FILE *lastclean;
  128. /* Active only if idle_time>0 */
  129.     if(idle_time<=0) return;
  130. /* when is last clean? */
  131.     if(lastcleantime>nowtime-300) return;
  132.     mystrncpy(lastclean_name,"tmp/log/lastclean",sizeof(lastclean_name));
  133.     if(stat(lastclean_name,&lastclean_stat)==0 &&
  134.        lastclean_stat.st_mtime>nowtime-300 &&
  135.        lastclean_stat.st_mtime<nowtime+100) return;
  136.     fflush(NULL);
  137.     pid=fork(); if(pid>0) {addfork(pid,0); return;}
  138.     close(commsock);
  139.     if(withmain) _cleaning(sesd,1);
  140.     _cleaning("s2",2);
  141.     _cleaning("tmp/sessions",0);
  142.     _cleaning("chroot/tmp/sessions",0);
  143. /* touch lastclean file */
  144.     lastclean=fopen(lastclean_name,"w"); fclose(lastclean);
  145.     lastcleantime=nowtime;
  146.     snprintf(lastclean_name,sizeof(lastclean_name),"%s/trap.check",tmpd);
  147.     if(stat(lastclean_name,&lastclean_stat)==0 &&
  148.        (lastclean_stat.st_mtime<nowtime-3600 ||
  149.       lastclean_stat.st_mtime>nowtime+anti_time)) unlink(lastclean_name);
  150.     exit(0);
  151. }
  152.  
  153.