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.

 */

/* This file contains a routine to do housekeeping:

 * it erases obsolete session directories.

 * Regular checkup every 10 minutes or so.

 */

#include "wimslogd.h"

/* internal */

void _cleaning(char *di,int hardcheck)

{

  DIR *sdir_base;

  struct dirent *ses;

  struct stat session_stat;

  char session_name[MAX_LINELEN+1];

  sdir_base=opendir(di);

  if(sdir_base==NULL) return;

  while((ses=readdir(sdir_base))!=NULL) {

    if(ses->d_name[0]=='.') continue;

    snprintf(session_name,sizeof(session_name),"%s/%s",di,ses->d_name);

    if(lstat(session_name,&session_stat)) {

      wimslogd_error("wimslog cleaning(): session stat failure.");

      return;

    }

    if(!S_ISDIR(session_stat.st_mode)) { /* not a directory: remove it. */

      if(remove(session_name)<0) {

        wimslogd_error("wimslogd cleaning(): unable to chase squatter file.");

        return;

      }

    }

    /* remove idle session. */

  else {

    struct stat fst;

    char fbuf[4096],cbuf[MAX_LINELEN+1];

    char *pp;

    /* remove session inactive for more than idle_time seconds */

    if(session_stat.st_mtime<nowtime-idle_time ||

        session_stat.st_mtime>nowtime+anti_time) {

      remove:

      if(remove_tree(session_name)!=0) {

        if(strstr(session_name,"chroot")!=NULL) {

          char tbuf[4096];

          snprintf(tbuf,sizeof(tbuf),"/%s",session_name);

          setenv("tmp_dir",tbuf,1);

          chmod(session_name,

                S_IRUSR|S_IWUSR|S_IXUSR|

                S_IRGRP|S_IWGRP|S_IXGRP|

                S_IROTH|S_IWOTH|S_IXOTH);

          (void)chdir("public_html");

          call_ssh(1,"bin/ch..root cleantmpdir");

          (void)chdir(cwd);

          chmod(session_name,S_IRUSR|S_IWUSR|S_IXUSR);

          fprintf(stderr,"%s\n",tbuf);

        }

        if(remove_tree(session_name)!=0) {

          fprintf(stderr,"Unable to remove session %s: %s.\n",

                 session_name,strerror(errno));

        }

      }

      continue;

    }

    if(hardcheck==2) {

      char dbuf[MAX_FNAME+1];

      struct dirent *s2d;

      struct stat fst;

      int t;

      DIR *s2D;

      snprintf(dbuf,sizeof(dbuf),"%s/%s",sesd,ses->d_name);

      if(ftest(dbuf)!=is_dir) goto remove;

      s2D=opendir(session_name);

      if(sdir_base==NULL) goto remove;

      while((s2d=readdir(s2D))!=NULL) { /* remove individual files */

        snprintf(dbuf,sizeof(dbuf),"%s/%s",session_name,s2d->d_name);

        t=stat(dbuf,&fst);

        if(t==0 && fst.st_mtime<nowtime-INS_DELAY &&

               fst.st_mtime>=nowtime+anti_time) remove(dbuf);

      }

      closedir(s2D);

      continue;

    }

    /* keep sessions with _ in name unless hardcheck */

    if(!hardcheck || strchr(session_name,'_')!=NULL) continue;

    /* keep very new sessions (inactive for less than idle_time3 seconds) */

    if(session_stat.st_mtime>=nowtime-idle_time3 &&

       session_stat.st_mtime<nowtime+anti_time) continue;

    /* for sessions inactive for more than idle_time3 seconds,

       keep session if var.stat file exists */

    snprintf(fbuf,sizeof(fbuf),"%s/var.stat",session_name);

    if(stat(fbuf,&fst)==0) continue;

    /* sessions with no var.stat file, chech var file */

    wlogdaccessfile(cbuf,"r","%s/var",session_name);

    if(cbuf[0]==0) goto remove;      /* no var file, remove */

    /* keep manager sessions */

    pp=strstr(cbuf,"\nw_wims_ismanager=");

    if(pp!=NULL) {

      pp+=strlen("\nw_wims_ismanager=");

      if(*pp>'0' && *pp<='9') continue;

    }

    /* remove session inactive for more than idle_time2 seconds */

    if(session_stat.st_mtime<nowtime-idle_time2 ||

        session_stat.st_mtime>nowtime+anti_time) goto remove;

    /* remove unused sessions */

    if(session_stat.st_mtime<nowtime-idle_time3 &&

        strstr(cbuf,"\nwims_new_session=yes\n")!=NULL) goto remove;

         /* remove popup session: 50 sec only. */

    if(session_stat.st_mtime<nowtime-50 &&

        strstr(cbuf,"\nw_wims_mode=popup\n")!=NULL) goto remove;

    }

  }

  closedir(sdir_base);

}

/* Clean obsolete session directories. */

void cleaning(int withmain)

{

  struct stat lastclean_stat;

  pid_t pid;

  char lastclean_name[MAX_FNAME+1];

  FILE *lastclean;

  /* Active only if idle_time>0 */

  if(idle_time<=0) return;

  /* when is last clean? */

  if(lastcleantime>nowtime-300) return;

  mystrncpy(lastclean_name,"tmp/log/lastclean",sizeof(lastclean_name));

  if(stat(lastclean_name,&lastclean_stat)==0 &&

      lastclean_stat.st_mtime>nowtime-300 &&

      lastclean_stat.st_mtime<nowtime+100) return;

  fflush(NULL);

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

  close(commsock);

  if(withmain) _cleaning(sesd,1);

  _cleaning("s2",2);

  _cleaning("tmp/sessions",0);

  _cleaning("chroot/tmp/sessions",0);

  /* touch lastclean file */

  lastclean=fopen(lastclean_name,"w"); fclose(lastclean);

  lastcleantime=nowtime;

  snprintf(lastclean_name,sizeof(lastclean_name),"%s/trap.check",tmpd);

  if(stat(lastclean_name,&lastclean_stat)==0 &&

      (lastclean_stat.st_mtime<nowtime-3600 ||

      lastclean_stat.st_mtime>nowtime+anti_time)) unlink(lastclean_name);

  exit(0);

}