- /*    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. 
-  */ 
-       /* line input / output / translation routines 
-        * and error routines */ 
-   
- int is_class_module=0; 
-   
- int trusted_module(void); 
- void phtml_put_base(char *fname,int cache); 
- void module_error(char msg[]); 
- void user_error(char msg[]); 
- void accessfile(char *content, char *type, char *s,...); 
- int remove_tree(char *p); 
- void output(char *s,...); 
- char *_getvar(char *vname); 
- int checkhost(char *hlist); 
-   
- char *lastdata; 
- char lastdatafile[MAX_FNAME+1]; 
- char *datacache[DATAFIELD_LIMIT]; 
- int  nextdatacache; 
- struct stat ftst; 
- char lastftest[MAX_FNAME+1]; 
- int lastftype; 
- char outbuf[8192]; 
- char *outptr; 
-   
-   /* These modules can execute private programs. 
-    * adm/ modules are always trusted, so need no definition here. */ 
- char *trusted_modules=""; 
-             /* bit 0: module is not trusted. 
-              * bit 1: file in wimshome. 
-              * bit 2: readdef or file in writable directory. 
-              */ 
- int untrust=0;  /* non-zero if user detrusts the module. */ 
-   
- int error_status=0; 
- char pidbuf[32]; 
- #include <utime.h> 
-   
- void delete_pid(void); 
-   
-       /* Internal use only */ 
- void _debug(char *s,...) 
- { 
-     va_list vp; 
-     char buf[MAX_LINELEN+1]; 
-   
-     vsnprintf(buf,sizeof(buf),s,vp); 
-     setvar("debug",buf); module_error("debug"); 
- } 
-   
-   
-       /* HTTP response header for non-processed CGI interface */ 
- void nph_header(int code) 
- { 
-     char *cstr; 
-     switch(code) { 
-       case 200: cstr="OK"; break; 
-       case 301: cstr="Moved Permanently"; break; 
-       case 302: cstr="Moved Temporarily"; break; 
-       case 420: cstr="WIMS Nested Error"; break; 
-       case 450: cstr="WIMS User Error"; break; 
-       case 500: cstr="WIMS Internal Error"; break; 
-       case 550: cstr="WIMS Module Error"; break;       
-       default: cstr="ERROR"; break; 
-     } 
-     if(- httpd_type !=- httpd_wims ) printf("Status: %d %s\r\n",- code ,- cstr );
 
-     else { 
-       char *p, tbuf[256]; 
-       mystrncpy (- tbuf ,ctime(&- nowtime ),sizeof(- tbuf ));
-       for(- p =- tbuf +strlen(- tbuf );- p >=- tbuf  && (*(- p -1)=='\n' || *(- p -1)=='\r');-  p --);
 
-       *p=0; 
- Date: %s\r\n\ 
- Connection: close\r\n\ 
- ",code,cstr,tbuf); 
-     } 
- } 
-   
- void flushoutput(void) 
- { 
-     int l2; 
-     if(outptr<=outbuf) return; 
-     l2=outptr-outbuf; 
-     if(lastout_file!=-1) (void)write(lastout_file,outbuf,l2); 
-     else fwrite(- outbuf ,- l2 ,1,- stdout );
 
-     outptr=outbuf; 
- } 
-   
- void internal_warn(char msg[]) 
- { 
-     char buf[1024]; 
-     snprintf(- buf ,sizeof(- buf ),"%s: %s\n",- nowstr ,- msg );
 
-     accessfile(buf,"a","%s/internal_error.log",log_dir); 
- } 
-   
-   /* Internal error: panic and forget about requester. */ 
- void internal_error(char msg[]) 
- { 
-     if(error_status<2) { 
-       nph_header(500); 
-       printf("Cache-Control: no-cache\nPragma: no-cache\r\n\ 
- Content-type: text/plain\r\n\r\n\r\n\ 
- WIMS panick! %s \n- %s \n- " ,- msg ,strerror(- errno ));
-       error_status=2; internal_warn(msg); 
-     } 
- } 
-   
- void tex_nospace(char *p) 
- { 
-     char *p1, *p2; 
-     char buf[MAX_LINELEN+1]; 
-     for(p1=buf,p2=p;*p2 && p1-buf<MAX_LINELEN-4;p2++) { 
-       if(!isspace(*- p2 )) {*- p1 ++=*- p2 ;continue;}
 
-       if(*(p1-1)=='\\' ||  
-          (p1>buf && myisalnum(*(p1-1)) && myisalnum(*p2))) 
-         *p1++=' '; 
-       *p1++=*p2; 
-     } 
- } 
-   
- void nametoolong(char *p) 
- { 
-     char buf[MAX_FNAME+17]; 
-     force_setvar("wims_error_data",buf); 
-     module_error("file_name_too_long"); 
- } 
-   
- enum{is_file, is_dir, is_exec, is_fifo, is_socket, is_unknown}; 
- off_t ftest_size; 
-   
-       /* A simple front-end of stat(). */ 
- int ftest(char *fname) 
- { 
-     if(strcmp(- fname ,- lastftest )==0) return-  lastftype ;
 
- /* if(fname[0]=='/' || fname[0]=='.') fprintf(stderr,"ftest: %s\n",fname); */ 
-     mystrncpy(lastftest,fname,sizeof(lastftest)); 
-     if(stat(fname,&ftst)) return lastftype=-1; 
-     ftest_size=ftst.st_size; 
-     if(S_ISREG(ftst.st_mode)) { 
-       if((ftst.st_mode&(S_IXUSR|S_IXGRP|S_IXOTH))!=0) return lastftype=is_exec; 
-       else return lastftype=is_file; 
-     } 
-     if(S_ISDIR(ftst.st_mode)) return lastftype=is_dir; 
-     if(S_ISFIFO(ftst.st_mode)) return lastftype=is_fifo; 
-     if(S_ISSOCK(ftst.st_mode)) return lastftype=is_socket; 
-     return lastftype=is_unknown; 
- } 
-   
- char fnbuf[MAX_FNAME+1]; 
-   
-       /* make a filename and check length */ 
- char *mkfname(char buf[], char *s,...) 
- { 
-     va_list vp; 
-     char *p; 
-   
-     if(buf==NULL) p=fnbuf; else p=buf; 
-     vsnprintf(p,MAX_FNAME,s,vp); 
-     if(strlen(- p )>=- MAX_FNAME -1)-  nametoolong (- p );
 
-     return p; 
- } 
-   
- void sysmask_trigger(char *s) 
- { 
-     char buf[MAX_FNAME+1]; 
-     struct stat st; 
-     mkfname(buf,"%s/%s",sysmask_trigger_dir,s); 
-     stat(buf,&st); 
- } 
-   
-       /* read-in a file into buffer. Use open() and read(). 
-        * Return buffer address which will be malloc'ed if buf=NULL. */ 
- char *readfile(char *fname, char buf[], long int buflen) 
- { 
-     int fd, t, st; 
-     long int l, lc; 
-     char *bf; 
-     t=0; if(buf) buf[0]=0; 
-     st=ftest(fname); if(st!=is_file) { 
-       if(st==is_exec) { /* refuse to open executable file */ 
-           setvar("executable",fname); module_error("executable"); 
-       } 
-       return NULL; 
-     } 
-     l=ftst.st_size; if(l<0) return NULL; 
-     if(l>=buflen) { 
-       if(buflen<MAX_LINELEN) l=buflen-1; 
-       else { 
-             setvar(error_data_string,fname); module_error("file_too_long"); 
-           } 
-           else user_error("cmd_output_too_long"); 
-       } 
-     } 
-     fd=open(fname,O_RDONLY); if(fd==-1) return NULL; 
-     if(buf==NULL) bf=xmalloc(l+8); else {bf=buf;if(l==0) {t=1; l=buflen-1;}} 
-     lc=read(fd,bf,l); close(fd); 
-     if(lc<0 || lc>l || (lc!=l && t==0))  
-       {if(- buf ==- NULL ) free(- bf ); else-  buf [0]=0; return-  NULL ;}
 
-     bf[lc]=0; _tolinux(bf); return bf; 
- } 
-   
-       /* Get a line in a stored working file.  
-        * Buffer length is always MAX_LINELEN. */ 
- int wgetline(char buf[], size_t buflen, WORKING_FILE *f) 
- { 
-     int i,j; unsigned int n; 
-     i=f->linepointer; buf[0]=0; 
-     if(i>=f->linecnt || f->textbuf==NULL) return EOF; 
-     n=f->lines[i].llen; 
-     if(n>=buflen) n=buflen-1; 
-     if(- n >0) memmove(- buf ,- f ->- lines [- i ]- . address,- n );-  buf [- n ]=0;
 
-     for(j=i+1;j<f->linecnt && f->lines[j].isstart==0;j++); 
-     f->l=i; f->linepointer=j; 
-     if(j>=f->linecnt && n==0) return EOF; else return n; 
- } 
-   
- int get_cached_file(char *name) 
- { 
-     int i,l,flag; 
-     l =strlen(- name ); if(- l >=127) return -1;
-     if(strncmp(- module_prefix ,- module_dir ,strlen(- module_dir ))!=0)-  flag =8; else-  flag =0;
 
-     for(i=0;i<mcachecnt;i++) { 
-       if(- flag ==- mcache [- i ]- . nocache && strcmp(- name ,- mcache [- i ]- . name)==0) {
 
-           memmove(&- m_file ,- mcache +- i ,sizeof(- WORKING_FILE ));
 
-           m_file.nocache|=4; 
-           return i; 
-       } 
-     } 
-     return -1; 
- } 
-   
-       /* Open a work file. Returns 0 if OK. */ 
- int open_working_file(WORKING_FILE *f, char *fname) 
- { 
-     char *p, *q; 
-     void *vp; 
-     int i,j,k,laststart,lc[LINE_LIMIT]; 
-   
-     f->linecnt=f->linepointer=0; 
-     f->for_idx=f->nocache=0; 
-     f->l=-1; f->lines=NULL; 
-     f->textbuf=readfile(fname,NULL,WORKFILE_LIMIT); 
-     if(f->textbuf==NULL) return -1; 
-     p=f->textbuf; if(*p) { 
-       for(- i =0,- p --;-  i <- LINE_LIMIT -1 &&-  p !=- NULL ;- p =strchr(- p ,'\n')) {
 
-           if(i>0) *p=0; 
-           lc[i++]=(++p-f->textbuf); 
-       } 
-     } 
-     else i=0; 
-     if(i>=LINE_LIMIT-1) module_error("file_too_long"); 
-     lc [- i ]=- lc [- i -1]+strlen(- f ->- textbuf +- lc [- i -1])+1;
-     f->textbuf[lc[i]]=0; 
-     f->linecnt=i; laststart=0; 
-     f->for_stack=xmalloc(MAX_FOR_LEVEL*sizeof(FOR_STACK)+(i+1)*sizeof(LINE_STRUCT)); 
-     vp=f->for_stack+MAX_FOR_LEVEL; f->lines=vp; 
-     for(j=0;j<i;j++) { 
-       f->lines[j].address=p=(f->textbuf)+lc[j]; 
-       f->lines[j].llen=lc[j+1]-lc[j]-1; 
-       (f->lines[j]).execcode=(f->lines[j]).varcode=-1; 
-       if(j==0) goto normal; 
-       q=f->lines[laststart].address+f->lines[laststart].llen-1; 
-       if(q>=f->textbuf && *q=='\\') { 
-           f->lines[laststart].llen+=f->lines[j].llen; *q='\n'; 
-           f->lines[j].isstart=f->lines[j].llen=0; 
-       } 
-       else { 
-           normal: for(q=p;myislspace(*q);q++); 
-           f->lines[j].isstart=1; laststart=j; k=0; 
-           switch(*q) { 
-                   /* isstart: bit 1 = start. 
-                    * bit 2 = exec 
-                    * bit 3 (4) = label 
-                    * bit 4 (8) = hard comment (!!) 
-                    * bit 5 (16) = soft comment (#) */ 
-             case exec_prefix_char: { 
-                 if(myisalpha(q[1])) f->lines[j].isstart=3; 
-                 else f->lines[j].isstart=9; 
-                 k=1; break; 
-             } 
-             case label_prefix_char: {f->lines[j].isstart=5; k=1; break;} 
-             case comment_prefix_char: {f->lines[j].isstart=17; break;} 
-             default: {f->lines[j].isstart=1; break;} 
-           } 
-           if(k && q>p) {f->lines[j].address=q;f->lines[j].llen-=q-p;} 
-       } 
-     } 
-     f->lines[i].isstart=1; f->lines[i].llen=0; 
-     f->lines[i].address=(f->textbuf)+lc[i]; 
-     mfilecnt++; return 0; 
- } 
-   
-       /* close an earlier opened working file */ 
- void close_working_file(WORKING_FILE *f, int cache) 
- { 
-     f->linepointer=f->l=0; 
-     if(cache && untrust==0 && mcachecnt<MAX_MCACHE && (f->nocache&7)==0) { 
-       memmove(- mcache +- mcachecnt ,- f ,sizeof(- WORKING_FILE ));
 
-       mcachecnt++; 
-     } 
-     else if((f->nocache&4)==0) { 
-       if(- f ->- for_stack !=- NULL ) free(- f ->- for_stack );
 
-       if(- f ->- textbuf !=- NULL ) free(- f ->- textbuf );
 
-     } 
-     f->for_stack=NULL; f->textbuf=NULL; f->linecnt=0; 
- } 
-   
- void free_mcache(void) 
- { 
-     int i; 
-     untrust=0; 
-     for(i=mcachecnt-1;i>=0;i--) close_working_file(mcache+i,0); 
-     mcachecnt=0; 
- } 
-   
- void cleantmpdir(void); 
- void user_error_log(char msg[]); 
-   
- void nested_error(char msg[]) 
- { 
-     fprintf(- stderr ,"\nNested error! %s\n",- msg );
 
-     nph_header(420); 
-     printf("\r\n\r\nWIMS error processing aborted on nested error.\r\n\r\n%s\r\n",- msg );
 
- } 
-   
-       /* Send an error message to requester and exit. 
-        * This is for user errors, language-sensitive. */ 
- void user_error(char msg[]) 
- { 
-     char erfname[MAX_FNAME+1]; 
-   
-     if(error_status) nested_error(msg); 
-     error_status=1; 
-     mkfname(erfname,"%s.%s",user_error_msg_file,lang); 
-     if(ftest(erfname)!=is_file) internal_error("user_error(): error message file not found.\n\ 
- Bad installation."); 
-     force_setvar("wims_user_error",msg); 
-     if(strcmp(- msg ,"threshold")!=0)-  user_error_log (- msg );
 
-     if(lastout_file!=-1 && outputing) { 
-       flushoutput(); close(lastout_file); lastout_file=-1; 
-     } 
-     nph_header(450); 
-     phtml_put_base(erfname,0);  
-     if(strcmp(- msg ,"double_click")!=0)-  delete_pid ();
 
-     else { 
-       cleantmpdir(); flushlog(); 
-     } 
- } 
-   
- void module_error_log(char msg[]); 
-   
-       /* Messages for module errors. English only. */ 
-       /* This is really rudimentary for the time being. */ 
- void module_error(char msg[]) 
- { 
-     int send=0; 
-     char *p; 
-     WORKING_FILE mf; 
-   
-     if(error_status) nested_error(msg); 
-     error_status=1; untrust=0; 
-     module_error_log(msg); 
-     nph_header(550); 
-     printf("Server: %s %s (%s)\r\n",-  SHORTSWNAME ,- wims_version ,- LONGSWNAME );
 
-     p=getvar("wims_main_font"); 
-     if(- p !=- NULL  && *- p !=0) printf("Content-type: text/plain; charset=%s\r\n\r\n",- p );
 
-     else printf("Content-type: text/plain\r\n\r\n"); 
-     p=getvar(ro_name[ro_module]); if(p==NULL) p="???"; 
-     printf("ERROR.\n\nwims has detected an error in the module '%s'.",- p );
 
-     if(- m_file. l>=0) printf("\n\nIn file '%s', line %d:",
 
-                      m_file.name,m_file.l+1); 
-     if(open_working_file(&mf,mkfname(NULL,"%s.%s",module_error_msg_file,lang))!=0) 
-       internal_error("module_error(): error message file not found."); 
-     while(wgetline(tmplbuf,MAX_LINELEN,&mf)!=EOF) { 
-       if(tmplbuf[0]!=tag_prefix_char) { 
-           if(- send ) {- substit (- tmplbuf ); puts(- tmplbuf );}
 
-           continue; 
-       } 
-       strip_trailing_spaces(tmplbuf); 
-       if(- tmplbuf [1]==0 || strcmp(- msg ,- tmplbuf +1)==0)-  send =1;
 
-       else send=0; 
-     } 
-     close_working_file(&mf,0); 
-     outptr =- outbuf ;-  delete_pid (); exit(1);
- } 
-   
- /* Output kernel routine */ 
- void _output_(char *s) 
- { 
-     int l,l2; 
-     l =strlen(- s );-  output_length +=- l ;
-     if(output_length>=OUTPUT_LENGTH_LIMIT) { 
-       module_error("output_too_long"); return; 
-     } 
-     l2=sizeof(outbuf)-(outptr-outbuf); 
-     put: if(l<=l2) { 
-       memmove(- outptr ,- s ,- l );-  outptr +=- l ; return;
 
-     } 
-     memmove(- outptr ,- s ,- l2 );-  s +=- l2 ;-  l -=- l2 ;
 
-     if(lastout_file!=-1) (void)write(lastout_file,outbuf,sizeof(outbuf)); 
-     else fwrite(- outbuf ,sizeof(- outbuf ),1,- stdout );
 
-     outptr=outbuf; l2=sizeof(outbuf); goto put; 
- } 
-   
- /* Output with no var. */ 
- void output0(char buf[]) 
- { 
-     char *p1, *p2, *ps; 
-     int dynsave; 
-     if(backslash_insmath) { 
-      ps=buf; dynsave=instex_usedynamic; 
-          p2=find_matching(p1+2,')'); 
-          if(p2==NULL) break; 
-          if(p1>buf && *(p1-1)=='\\') continue; 
-          *p1=0; if(*(p2-1)=='\\') *(p2-1)=0; *p2++=0; _output_(ps); ps=p2; 
-          instex_usedynamic=1; insmath(p1+2); 
-      } 
-      if(*ps) _output_(ps); instex_usedynamic=dynsave; 
-     } 
-     else _output_(buf); 
- } 
-   
- /* Output routine */ 
- void output(char *s,...) 
- { 
-     va_list vp; 
-     char buf[4*MAX_LINELEN+1]; 
-   
-     vsnprintf(buf,sizeof(buf),s,vp); 
-     output0(buf); 
- } 
-   
-      /* read in tmpf in tmp directory, and places in p. 
-       * Maximal length: MAX_LINELEN. */ 
- void read_tmp_file(char *p, const char *fname) 
- { 
-     char *name, *pp; 
-     name=mkfname(NULL,"%s/%s",tmp_dir,fname); 
-     if(!exec_is_module || !outputing || !direct_exec 
-        || strcmp(- fname ,"exec.out")!=0) {
 
-       readfile(name,p,MAX_LINELEN); 
-       pp=getvar("wims_exec_dollar_double"); 
-       if(- pp  && strcmp(- pp ,"yes")==0) {
 
-             string_modify(p,pp,pp+1,"$$"); 
-       } 
-     } 
-     else { 
-       char *s; 
-       s=readfile(name,NULL,OUTPUT_LENGTH_LIMIT); 
-       if(s==NULL) {*p=0; return;} 
-       if(memcmp(- s ,"Error: ", strlen("Error: "))==0)-  mystrncpy (- p ,- s ,- MAX_LINELEN );
 
-       if(output_length>=OUTPUT_LENGTH_LIMIT) module_error("output_too_long"); 
-       else _output_(s); 
-       chmod(name,S_IRUSR|S_IWUSR); 
-     } 
- } 
-   
-       /* verify whether the module is trusted. 
-        * Returns 1 if yes, 0 if no. -1 for error. */ 
- int trusted_module(void) 
- { 
-     char *modname, *w, buf[MAX_LINELEN+1]; 
-     int i,n; 
-     static int _trusted=-1;      /* avoid repeated computations */ 
-      
-     if(untrust&255) return 0; 
-     if(_trusted>=0) return _trusted; 
-     modname=getvar(ro_name[ro_module]); 
-     if(modname==NULL || *modname==0) return 0; 
-        strcmp(- modname ,- home_module )==0 ||
 
-       tr: 
-         is_class_module=1; 
-       setenv("trusted_module","yes",1); 
-       return _trusted=1; 
-     } 
-     n=wordnum(trusted_modules); for(i=0;i<n;i++) { 
-       w=fnd_word(trusted_modules,i+1,buf); 
-       if(strcmp(- w ,- modname )==0) goto-  tr ;
 
-     } 
-     return _trusted=0; 
- } 
-   
-       /* file should be in the module directory, but  
-        * it may also be somewhere else. 
-        * buf[] requires MAX_FNAME+1 length. 
-        * Returns 0 if found. */ 
- int find_module_file(char *fname, char buf[], int mode) 
- { 
-     char *p, dtest[32]; 
-      
-     fname=find_word_start(fname); 
-     if(*fname==0) return -1; 
-       /* Name checking: no directory backtracing. */ 
-     if(strstr(- fname ,- parent_dir_string )!=- NULL ) {
 
-       setvar(error_data_string,fname); module_error("illegal_fname"); 
-       return -1; 
-     } 
-     p =strchr(- fname ,'/'); if(- p ==- NULL  ||-  p >- fname +10) goto-  openit ;
-     memmove(- dtest ,- fname ,- p -- fname );-  dtest [- p -- fname ]=0;
 
-     if(strcmp(- dtest ,"datamodule")==0) {
 
-       mkfname(buf,"modules/data%s",p); goto lastopen; 
-     } 
-     if(strcmp(- dtest ,"wimshome")==0 &&-  trusted_module ()) {
 
-       mkfname(buf,"%s%s",getvar("wims_home"),p); goto lastopen; 
-     } 
-     if(strcmp(- dtest ,"writable")==0) {
 
-           mkfname(buf,"%s/%s",tmp_dir,p+1); 
-       } 
-       else { 
-           mkfname(buf,"w/%s/%s",module_prefix,p+1); 
-       } 
-       untrust|=4;  
-     } 
-     else { 
-       openit: mkfname(buf,"%s/%s",module_prefix,fname); 
-     } 
-     if(mode) return 0; 
-     if(ftest(buf)!=is_file) { 
-       if(lastftype==is_exec) { 
- isexec: 
-           setvar("executable",fname); module_error("executable"); 
-           return -1; 
-       } 
-          (!trusted_module() || is_class_module)) return -1; 
-       mkfname(buf,"scripts/%s",fname); 
-       lastopen: 
-       if(mode) return 0; 
-       if(ftest(buf)!=is_file) { 
-           if(lastftype==is_exec) goto isexec; 
-           else return -1; 
-       } 
-     } 
-     return 0; 
- } 
-   
-       /* check whether a file is user-submitted */ 
-       /* This is deprecated because of the wimshome/ method. */ 
- /* int user_file(char *name) { 
-     if(name[0]=='/' || name[0]=='.' || 
-        strstr(name,"classes/")!=NULL ||  
-        strstr(name,"forums/")!=NULL || 
-        strstr(name,"sessions/")!=NULL || 
-        strstr(name,"doc/")!=NULL) return 1; else return 0; 
- } */ 
-   
-       /* returns 1 if violation */ 
- int datafile_check(char *name) { 
-     if((untrust&255)==0) return 0; 
-     if(strncmp(- name ,"datamodule/",strlen("datamodule/"))==0) return 0;
 
-     return 1; 
- } 
-   
-       /* returns 0 if success */ 
- void readdatafile(char *name) 
- { 
-     char *pp; 
-     if(strcmp(- name ,- lastdatafile )==0) return;
 
-     lastdata[0]=0; readfile(name,lastdata,WORKFILE_LIMIT); 
-     mystrncpy(lastdatafile,name,sizeof(lastdatafile)); 
-     datacache[0]=lastdata; nextdatacache=1; 
-     if(lastdata[0]==tag_string[1]) { 
-       datacache[1]=lastdata; nextdatacache++; 
-     } 
-     pp =strstr(- lastdata ,- tag_string );
-     if(pp) datacache[nextdatacache]=pp; 
-     else-  datacache [- nextdatacache ]=- lastdata +strlen(- lastdata );
 
- } 
-   
- char *_nextdata(char *p) 
- { 
-     char *pp; 
-     if(!*p) return p; 
-     if(pp) return pp; 
- } 
-   
-       /* datafile structure: number of records. 
-        * tag=1 if direct access */ 
- unsigned int datafile_recordnum(char *p) 
- { 
-     char nbuf[MAX_LINELEN+1], *pp; 
-     int i, t, ret; 
-   
-     t=untrust; ret=0; 
-     if(direct_datafile) mystrncpy(nbuf,p,sizeof(nbuf)); 
-     else if(datafile_check(p)!=0 || find_module_file(p,nbuf,0)) goto ret; 
-     readdatafile(nbuf);  
-     for(i=nextdatacache, pp=datacache[i]; *pp;) { 
-       pp=_nextdata(pp+1); i++; 
-       if(i<DATAFIELD_LIMIT) { 
-           datacache[i]=pp; nextdatacache=i; 
-       } 
-     } 
-     ret=i-1; 
-     ret: 
-     untrust=t; 
-     return ret; 
- } 
-   
-       /* datafile structure: find record n, starting from 1 */ 
- char *datafile_fnd_record(char *p, int n, char bf[]) 
- { 
-     char nbuf[MAX_LINELEN+1], *pp, *p2; 
-     int i, t; 
-   
-     bf[0]=0; t=untrust; 
-     if(n<0) goto ret; 
-     if(direct_datafile) mystrncpy(nbuf,p,sizeof(nbuf)); 
-     else if(datafile_check(p)!=0 || find_module_file(p,nbuf,0)) goto ret; 
-     readdatafile(nbuf); if(*lastdata==0) goto ret; 
-     if(n>nextdatacache) { 
-       for(i=nextdatacache, pp=datacache[i]; i<n && *pp;) { 
-           pp=_nextdata(pp+1); i++; 
-           if(i<DATAFIELD_LIMIT) { 
-             datacache[i]=pp; nextdatacache=i; 
-           } 
-       } 
-     } 
-     else pp=datacache[n]; 
-     if(!*pp) goto ret; 
-     if(- n >1 || (- n ==1 && *- pp !=- tag_string [1]))-  pp +=strlen(- tag_string );
 
-     else if(- n ==1)-  pp +=strlen(- tag_string )-1;
 
-     if(n<nextdatacache) p2=datacache[n+1]; 
-     else { 
-       if(n<DATAFIELD_LIMIT-1 && n==nextdatacache) { 
-           nextdatacache++; datacache[nextdatacache]=p2; 
-       } 
-     } 
-     if(p2-pp>=MAX_LINELEN) p2=pp+MAX_LINELEN-1; 
-     if(p2<pp) p2=pp; 
-     ret: 
-     untrust=t; return bf; 
- } 
-   
- char hex2char(char c1, char c2) 
- { 
-     char tbuf[16]; 
-     if(c1<'0' || c1>'f' || c2<'0' || c2>'f') { 
- invl: 
-       snprintf(- tbuf ,sizeof(- tbuf ),"%%%c%c",- c1 ,- c2 );
 
-       setvar(error_data_string,tbuf); 
-       user_error("invalid_char_in_query_string"); 
-     } 
-     if(c1>'9' && c1<'A') goto invl; 
-     if(c2>'9' && c2<'A') goto invl; 
-     if(c1>'F' || c2>'F') goto invl; 
-     if(c1>='A') c1=c1-'A'+'9'+1; 
-     if(c2>='A') c2=c2-'A'+'9'+1; 
-     return (c1-'0')*16+c2-'0'; 
- } 
-   
-       /* Converts back http escaped chars, slight. Does not check buffer length. 
-        * Returns converted string length. */ 
- int _http2env(char outs[], char ins[]) 
- { 
-     int j,k,l; 
-     for(- j =- k =0;- j <- l  && !isspace(- ins [- j ]);- j ++,- k ++) {
 
-       if(isspace(- ins [- j ])) {  /* skip space characters in query string */
 
-           k--;continue; 
-       } 
-       if(ins[j]=='%') { 
-             /* skip Carriage-Return. */ 
-           if(ins[j+1]=='0' && (ins[j+2]=='d' || ins[j+2]=='D')) { 
-             j+=2; k--; continue; 
-           } 
-           outs[k]=hex2char(ins[j+1],ins[j+2]); 
-           j+=2; continue; 
-       } 
-       outs[k]=ins[j]; 
-     } 
-     outs[k]=0;     
-     return k; 
- } 
-   
-       /* Converts back http escaped chars. Does not check buffer length. 
-        * Returns converted string length. */ 
- int http2env(char outs[], char ins[]) 
- { 
-     int j,k,l; 
-     for(- j =- k =0;- j <- l  && !isspace(- ins [- j ]);- j ++,- k ++) {
 
-       if(isspace(- ins [- j ])) {  /* skip space characters in query string */
 
-           k--;continue; 
-       } 
-       if(ins[j]=='%') { 
-             /* skip Carriage-Return. */ 
-           if(ins[j+1]=='0' && (ins[j+2]=='d' || ins[j+2]=='D')) { 
-             j+=2; k--; continue; 
-           } 
-           outs[k]=hex2char(ins[j+1],ins[j+2]); 
-           j+=2; continue; 
-       } 
-       if(ins[j]=='+') { 
-           outs[k]=' '; continue; 
-       } 
-       if(ins[j]=='?' || ins[j]=='&') { 
-           outs[k]=0; continue; 
-       } 
-       outs[k]=ins[j]; 
-     } 
-     outs[k]=0;     
-     return k; 
- } 
-   
-       /* translate a string to http querystring style. 
-        * '&' is not translated. 
-        * Buffer p must be at least MAX_LINELEN. */ 
- void tohttpquery(char *p) 
- { 
-     char trlist[]="     ()[]{}+-*^|/\"\'!:;,<>\n"; 
-     char *pp; 
-     for(pp=p;*pp;pp++) { 
-       if(*pp==' ') { 
-           *pp='+'; continue; 
-       } 
-       if(strchr(- trlist ,*- pp )==- NULL ) continue;
 
-       if(*pp=='+' && pp>p && *(pp-1)=='&') continue; 
-       if(pp>p && *(pp-1)=='\\') { 
-           ovlstrcpy(pp-1,pp);pp--;continue; 
-       } 
-       if(*pp=='\n') { 
-           string_modify(p,pp,pp+1,"%%0D%%0A");pp+=5; 
-       } 
-       else { 
-           string_modify(p,pp,pp+1,"%%%02X",*pp);pp+=2; 
-       } 
-     } 
- } 
-   
-       /* substitute backslash parameters. Internal use only. */ 
- void slashsubst(char *p) 
- { 
-     char *p1, *p2, *pt, *pp, namebuf[128]; 
-     int n; 
-   
-       p1++; for(p2=p1; myisalnum(*p2) || *p2=='_'; p2++); 
-       if(p2<=p1 || p2>p1+100) continue; 
-       memmove(- namebuf +- n ,- p1 ,- p2 -- p1 );-  namebuf [- p2 -- p1 +- n ]=0;
 
-       pt=_getvar(namebuf); if(pt==NULL) continue; 
-       if(*p2=='[' && (pp=find_matching(p2+1,']'))!=NULL) { 
-           string_modify(p,pp+1,pp+1,")"); 
-           string_modify(p,p1-1,p1,"$(%s",mathfont_prefix); 
-       } 
-       else string_modify(p,p1-1,p1,"$%s",mathfont_prefix); 
-     } 
- } 
-   
-       /* two alarm handlers. */ 
- void alarm1(int s) 
- { 
-     if(killpid>0 && kill(killpid,SIGKILL)) module_error("timeup"); 
-     killpid=0; 
- } 
-   
- void alarm2(int s) 
- { 
-     cleantmpdir(); 
-     alarm1(s); module_error("timeup"); 
- } 
-   
- void finalalarm(void) 
- { 
-     time_t curr; 
-     if(curr>=limtime) alarm2(SIGALRM); 
-     errno=0; 
-     if(signal(SIGALRM,alarm2)==SIG_ERR) 
-     alarm(limtime-curr+1); 
- } 
-   
- void initalarm(void) 
- { 
-     limtimex=nowtime+4*rlimit_cpu/3; 
-     limtime=limtimex+2; finalalarm(); 
- } 
-   
- void forkalarm(void) 
- { 
-     time_t curr; 
-     if(curr>=limtimex) {alarm1(SIGALRM); return;} 
-     if(signal(SIGALRM,alarm1)==SIG_ERR) 
-     alarm(limtimex-curr+1); 
- } 
-   
-       /* create pid tag */ 
- void create_pid(void) 
- { 
-     char buf[MAX_FNAME+1], pbuf[256], obuf[MAX_FNAME+1]; 
-     struct stat dst; 
-     struct utimbuf ub; 
-      
-     if(robot_access || *session_prefix==0) return; 
-     if(cmd_type==cmd_getframe) return; 
-     mkfname(buf,"%s/.pid",s2_prefix); 
-             /* another process running? */ 
-     if(readfile(buf,pbuf,sizeof(pbuf))!=NULL) { 
-       mkfname(obuf,"/proc/%s",pbuf); 
-       if(stat(obuf,&dst)==0) user_error("double_click"); 
-     } 
-     snprintf(- pidbuf ,sizeof(- pidbuf ),"%u",- getpid ());
 
-     accessfile(pidbuf,"w","%s",buf); 
-       /* Touch session time */ 
-     if(strstr(- session_prefix ,"sessions/")==- NULL ) return;
 
-     ub.actime=ub.modtime=nowtime; 
-     utime(session_prefix,&ub); 
-     if(strchr(- session_prefix ,'_')!=- NULL ) { /* touch parent too */
 
-       char sbuf[MAX_FNAME+1], *p; 
-       mystrncpy(sbuf,session_prefix,sizeof(sbuf)); 
-       p =strchr(- sbuf ,'_'); if(- p !=- NULL ) *- p =0;
-       utime(sbuf,&ub); 
-     } 
- } 
-   
- struct { 
-     char cmd[MAX_EXEC_NAME+1]; 
-     unsigned int fd1, fd2; 
-     int pipe_stdin[2]; 
-     int pipe_stdout[2]; 
-     int pipe_stderr[2]; 
- } mxtab[MAX_MULTIEXEC]; 
- int mxno=0; 
-   
- int execredirected(char *cmdf, char *inf, char *outf, char *errf, char *arg[]) 
- { 
-     pid_t pid; 
-     int status, t; 
-   
-     if(robot_access) return 0; 
-       if(errf!=NULL) 
-         accessfile("No time left to execute subprograms.\n","w","%s",errf); 
-       return -100; 
-     } 
-     lastdatafile[0]=lastftest[0]=0; 
-     fflush(- NULL );      /* flush all output streams before forking
 
-                    * otherwise they will be doubled */ 
-     pid=fork(); if(pid==-1) return -1; 
-     if(!pid) {      /* child */ 
-       char buf[MAX_LINELEN+1]; int k; 
-       (void)nice(10);      /* lower priority for children */ 
-       if(is_multiexec) { 
-           dup2(mxtab[multiexec_index].pipe_stdin[0],0); 
-           dup2(mxtab[multiexec_index].pipe_stdout[1],1); 
-           dup2(mxtab[multiexec_index].pipe_stderr[1],2); 
-       } 
-       else { 
-           if(- inf !=- NULL ) (void)freopen(- inf ,"r",- stdin );
 
-           if(- outf !=- NULL ) (void)freopen(- outf ,"w",- stdout );
 
-           if(- errf !=- NULL ) (void)freopen(- errf ,"w",- stderr );
 
-       } 
-             /* This is to patch LinuxPPC uid wrapping  
-              * for scripts */ 
-           int tf; 
-           char tbuf[16]; 
-           tf=open(cmdf,O_RDONLY); (void)read(tf,tbuf,8); close(tf); 
-           if(memcmp(- tbuf +1,"ELF",3)!=0)-  t =1;
 
-       } 
-       if(wrapexec==-1) { 
-           setreuid(getuid(),getuid());setregid(getgid(),getgid()); 
-       } 
-       if(wrapexec==1 || (t==1 && wrapexec==0)) { 
-           setreuid(geteuid(),geteuid());setregid(getegid(),getegid()); 
-       } 
-       errno=0; 
-       if(strchr(- cmdf ,'/'))-  execve (- cmdf ,- arg ,- environ );
 
-       else execvp(cmdf,arg); 
-       snprintf(- buf ,sizeof(- buf ),"Failed to execute");
 
-       for(k=0;arg[k];k++) { 
-           snprintf(- buf +- t ,sizeof(- buf )-- t ," %s",- arg [- k ]);
 
-       } 
-       accessfile(buf,"a","%s/exec.fail",tmp_dir); 
-     } 
-     else {      /* parent */ 
-       wrapexec=0; status=0;  
-       if(exec_wait && !is_multiexec) { 
-           killpid=pid; forkalarm(); 
-           waitpid(pid,&status,0); killpid=0; finalalarm(); 
-       } 
-       return WEXITSTATUS(status); 
-     } 
- } 
-   
-       /* preparation for resident execution. 
-        * Returns 1 if already up, otherwise 0. */ 
- int multiexec(char *cmd, char **abuf) 
- { 
-     char *p; 
-     int i; 
-      
-     if(robot_access) return 0; 
-     if(strstr(- tmp_dir ,"sessions/")==- NULL ) return 0;
 
-     if(strstr(- tmp_debug ,"yes")!=- NULL  &&-  checkhost (- manager_site )>=1)
 
-       setenv("multiexec_debug","yes",1); 
-     p=getvar("wims_multiexec"); 
-     if(p==NULL || wordchr(p,cmd)==NULL) return 0; /* not allowed */ 
-     if(!multiexec_random[0]) { 
-       snprintf(- multiexec_random , sizeof(- multiexec_random ),
 
-              "%lX%lX%lX%lX%lX%lX%lX%lX", 
-              random(),random(),random(),random(), 
-              random(),random(),random(),random()); 
-       setenv("multiexec_random",multiexec_random,1); 
-     } 
-     for(- i =0;- i <- mxno  && strcmp(- cmd ,- mxtab [- i ]- . cmd)!=0;-  i ++);
 
-     multiexec_index=i; 
-     if(i==mxno) { 
-       if(mxno>=MAX_MULTIEXEC) return 0; 
-       if(pipe(mxtab[i].pipe_stdin)<0) return 0; 
-       if(pipe(mxtab[i].pipe_stdout)<0) return 0; 
-       if(pipe(mxtab[i].pipe_stderr)<0) return 0; 
-       mystrncpy(mxtab[i].cmd,cmd,sizeof(mxtab[i].cmd)); 
-       mxno++;      is_multiexec=1; 
-       exportall(); setenv("wims_exec_parm",multiexec_random,1); 
-       execredirected(abuf[0],NULL,NULL,NULL,abuf); 
-     } 
-     is_multiexec=0; 
-     return 1; 
- } 
-   
-       /* my system(), but with variable parms 
-        * More secure than system(), and direct fork. */ 
- int call_ssh(char *s,...) 
- { 
-     va_list vp; 
-     char buf[MAX_LINELEN+1]; 
-     char *arg[1024]; 
-     char *inf=NULL, *outf=NULL, *errf=NULL; 
-     char *cmdf, *p, *p2; 
-     int i, d; 
-   
-     if(robot_access) return 0; 
-     vsnprintf(buf,sizeof(buf),s,vp); 
-     p=find_word_start(buf); if(*p==0) return 0; 
-     cmdf=p; 
-     for(i=0;*p!=0 && i<1000; p=find_word_start(p2)) { 
-       switch(*p) { 
-           case '\'': { 
-             d=0; break; 
-           } 
-           case '"': { 
-             d=0; break; 
-           } 
-           default: d=1; p2=find_word_end(p); break; 
-       } 
-       if(*p2) *p2++=0; 
-       if(!d) {arg[i++]=p; continue;} 
-       switch(*p) { 
-           case '<': inf=++p; break; 
-           case '>': { 
-             p++; if(*p=='&') { 
-                 merge: p++; errf=outf=p; break; 
-             } 
-             else outf=p; 
-             break; 
-           } 
-           case '&': { 
-             p++; if(*p=='>') goto merge; 
-             else break; 
-           } 
-           case '2': { 
-             if(*(p+1)=='>') {errf=p+2; break;} 
-           } 
-           default: arg[i++]=p; break; 
-       } 
-     } 
-     arg[i]=NULL; 
-     return execredirected(cmdf,inf,outf,errf,arg); 
- } 
-   
-       /* Read/write to a file with variable parms to print filename */ 
- void accessfile(char *content, char *type, char *s,...) 
- { 
-     va_list vp; 
-     char buf[MAX_FNAME+1]; 
-     int fd; 
-   
-     if(robot_access) return; 
-     vsnprintf(buf,sizeof(buf),s,vp); 
-     if(strlen(- buf )>=- MAX_FNAME -1)-  nametoolong (- buf );
 
-     switch(*type) { 
-       case 'r': readfile(buf,content,MAX_LINELEN); return; 
-       case 'e': readfile(buf,content,MAX_LINELEN/4); return; /* limited read */ 
-       case 'w': fd=creat(buf,S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH); break; 
-       case 'a': fd=open(buf,O_WRONLY|O_CREAT|O_APPEND,S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH); break; 
-       default : return; 
-     } 
-     lastdatafile[0]=lastftest[0]=0; 
-     if(fd==-1) return; 
-     (void)- write (- fd ,- content ,strlen(- content ));-  close (- fd );
 
- } 
-   
-       /* system(), but with variable parms 
-        * Uses sh to execute command. */ 
- int call_sh(char *s,...) 
- { 
-     va_list vp; 
-     char buf[MAX_LINELEN+1]; 
-     char *abuf[8]; 
-   
-     if(robot_access) return 0; 
-     vsnprintf(buf,sizeof(buf),s,vp); 
-     abuf[0]="sh"; abuf[1]="-c"; abuf[2]=buf; abuf[3]=NULL; 
-     return execredirected(abuf[0],NULL,NULL,NULL,abuf); 
- } 
-   
- void _getdef(char buf[], char *name, char value[]) 
- { 
-     char *p1, *p2, *p3, *p4; 
-   
-     if(*name==0) goto nothing;      /* this would create segfault. */ 
-       p2 =- find_word_start (- p1 +strlen(- name ));
-       if((- p1 >- buf  && !isspace(*(- p1 -1))) || *- p2 !='=') continue;
 
-       p3=p1; while(p3>buf && *(p3-1)!='\n') p3--; 
-       p3=find_word_start(p3); 
-       if(p3<p1 && *p3!='!') continue; 
-       if(p3<p1) { 
-           p3++; p4=find_word_end(p3); 
-           if(find_word_start(p4)!=p1) continue; 
-           if(- p4 -- p3 !=3 || (strncmp(- p3 ,"set",3)!=0 &&
 
-             if(- p4 -- p3 !=6 || strncmp(- p3 ,"define",6)!=0) continue;
 
-           } 
-       } 
-       p2=find_word_start(p2); 
-       if(p2>p3) goto nothing; 
-       if(p3-p2>=MAX_LINELEN) user_error("cmd_output_too_long"); 
-       memmove(- value ,- p2 ,- p3 -- p2 );-  value [- p3 -- p2 ]=0;
 
-       strip_trailing_spaces(value); return; 
-     } 
- nothing: 
-     value[0]=0; return; 
- } 
-   
-       /* Get variable definition from a file. 
-        * Result stored in buffer value of length MAX_LINELEN. */ 
- void getdef(char *fname, char *name, char value[]) 
- { 
-     char buf[MAX_LINELEN+1], tbuf[MAX_LINELEN+1], nbuf[MAX_NAMELEN+1]; 
-     char *p1, *p2; 
-   
-     value[0]=0; if(readfile(fname,buf,sizeof(buf)-16)==NULL) return; 
-     mystrncpy(value,name,MAX_LINELEN); 
-     for(p1=value; *p1; p1=p2) { 
-       while(*p1 && !myisalnum(*p1) && *p1!='_') p1++; 
-       if(*p1==0) break; 
-       for(p2=p1; myisalnum(*p2) || *p2=='_'; p2++); 
-       if(p2-p1>MAX_NAMELEN) continue; 
-       memmove(- nbuf ,- p1 ,- p2 -- p1 );-  nbuf [- p2 -- p1 ]=0;
 
-       _getdef(buf,nbuf,tbuf); 
-       string_modify(value,p1,p2,"%s",tbuf); 
-     } 
- } 
-   
- int _setdef_changed; 
-   
- void _setdef(char buf[], char *name, char *value) 
- { 
-     char *p1, *p2, *p3; 
-     int n; 
-      
-       p2 =- find_word_start (- p1 +strlen(- name ));
-       if((- p1 >- buf  && !isspace(*(- p1 -1))) || *- p2 !='=') continue;
 
-       p3=p1; while(p3>buf && *(p3-1)==' ') p3--; 
-       if(p3>buf && *(p3-1)!='\n') continue; 
-           string_modify(buf,p2,p3,"%s",value); 
-           _setdef_changed++; 
-       } 
-       return; 
-     } 
-     if(n>0 && buf[n-1]!='\n')  
-       snprintf(- buf +- n ,- MAX_LINELEN -- n ,"\n%s=%s\n",- name ,- value );
 
-     else 
-       snprintf(- buf +- n ,- MAX_LINELEN -- n ,"%s=%s\n",- name ,- value );
 
-     _setdef_changed++; 
- } 
-   
-       /* Set variable definition to a file. */ 
- void setdef(char *fname, char *name) 
- { 
-     char buf[MAX_LINELEN+1]; 
-     char *p1, *p2, *p3; 
-   
-     _setdef_changed=0; 
-     if(strchr(- name ,'=')==- NULL ) return;
 
-     for(p1=name;*p1;p1++) { 
-       if(isspace(*- p1 ) && *- p1 !=' ' && *- p1 !='\n') *- p1 =' ';
 
-       if(*p1==' ') { 
-           for(- p2 =- p1 +1; isspace(*- p2 ) && *- p2 !='\n';-  p2 ++);
 
-           if(p2>p1+1) ovlstrcpy(p1+1,p2); 
-           p2=p1+1; if(*p2=='=' || *p2=='\n') ovlstrcpy(p1,p2); 
-       } 
-     } 
-     if(readfile(fname,buf,sizeof(buf))==NULL) buf[0]=0; 
-     for(p1=find_word_start(name); p1!=NULL; p1=p2) { 
-       p2 =strchr(- p1 ,'\n'); if(- p2 !=- NULL ) *- p2 ++=0;
-       p1=find_word_start(p1); 
-       p3 =strchr(- p1 ,'='); if(- p3 ==- NULL ) continue;
-       *p3++=0; p3=find_word_start(p3); 
-       _setdef(buf,p1,p3); 
-     } 
-     if(_setdef_changed) accessfile(buf,"w","%s",fname); 
- } 
-   
-       /* check whether connecting host is part of given list. 
-        * Returns 0 if no, 1 if yes. */ 
- int checkhost(char *hlist) 
- { 
-     char buf[MAX_LINELEN+1]; 
-     char lbuf[1024], hbuf1[256], hbuf2[256]; 
-     char *p1, *p2, *pb, *pe, *pp; 
-      
-     if(*remote_addr==0) return 0; 
-     snprintf(- hbuf1 ,sizeof(- hbuf1 ),"+%s+",- remote_addr );
 
-     if(*remote_host!=0) { 
-       snprintf(- hbuf2 ,sizeof(- hbuf2 ),"+%s+",- remote_host );
 
-       for(- p1 =- hbuf2 ; *- p1 ;-  p1 ++) *- p1 =tolower(*- p1 );
 
-     } 
-     else hbuf2[0]=0; 
-     mystrncpy(buf,find_word_start(hlist),sizeof(buf)); strip_trailing_spaces(buf); 
-     for(p1=buf; *p1; p1++) { 
-       if(!- myisalnum (*- p1 ) && strchr(".-_",*- p1 )==- NULL ) *- p1 =' ';
 
-     } 
-     if(strcmp(- buf ,"all")==0) return 1;      /* all is all */
 
-     for(p1=find_word_start(buf); *p1; p1=find_word_start(p2)) { 
-       p2=find_word_end(p1); if(*p2) *p2++=0; 
-       if(p2-p1<3) continue; 
-       if(myisalnum(*p1)) pb="+"; else pb=""; 
-       if(myisalnum(*(p2-1))) pe="+"; else pe=""; 
-       snprintf(- lbuf ,sizeof(- lbuf ),"%s%s%s",- pb ,- p1 ,- pe );
 
-       for(pp=p1; *pp && (myisdigit(*pp) || *pp=='.'); pp++);  
-       if(*pp) pp=hbuf2;      /* host name */ 
-       else pp=hbuf1;         /* ip number */ 
-       if(strstr(- pp ,- lbuf )!=- NULL ) return 1;      /* found */
 
-     } 
-     return 0; 
- } 
-   
-       /* return 1 if a word of bf2 is a substring of host. 
-        * Like checkhost, but with time check. 
-        * The content of bf2[] is destroyed. */ 
- int checkhostt(char bf2[]) 
- { 
-     char *p1, *p2, *p3; 
-       /* compare with starting time */ 
-       if(- p1 >- bf2  && !isspace(*(- p1 -1))) continue;
 
-       p3=find_word_start(++p1); p2=find_word_end(p3); 
-       if(p2-p3!=14) continue; 
-       p3[8]='.'; p3[11]=':'; if(*p2) *p2++=0; 
-       if(strncmp(- nowstr ,- p3 ,14)<0) return 0;
 
-       ovlstrcpy(p1-1,p2); p1-=2; 
-     } 
-       /* compare with ending time */ 
-       if(- p1 >- bf2  && !isspace(*(- p1 -1))) continue;
 
-       p3=find_word_start(++p1); p2=find_word_end(p3); 
-       if(p2-p3!=14) continue; 
-       p3[8]='.'; p3[11]=':'; if(*p2) *p2++=0; 
-       if(strncmp(- nowstr ,- p3 ,14)>0) return 0;
 
-       ovlstrcpy(p1-1,p2); p1-=2; 
-     } 
-     p1=find_word_start(bf2); if(*p1==0) return 1; 
-     return checkhost(p1); 
- } 
-   
-       /* bad identification */ 
- void bad_ident(void) 
- { 
-     if(cookiegot[0]!=0) { 
-     } 
-     user_error("bad_ident"); 
- } 
-   
- void instex_flush(void) 
- { 
-     char *p; 
-     setenv("texgif_style","",1); 
-     setenv("texgif_tmpdir",tmp_dir,1); 
-     setenv("texgif_src",instex_src,1); 
-     setenv("texgif_outfile",instex_fname,1); 
-     unsetenv("w_instex_color"); 
-     getwimstexsize=0; fix_tex_size(); getwimstexsize=1; 
-     for(p=instex_fname;*p;p++) if(*p=='\n') *p=' '; 
-     wrapexec=0; call_ssh("%s/%s >%s/ins.Out 2>%s/ins.Err", 
-                    bin_dir,instex_processor, 
-                    tmp_dir,tmp_dir); 
-     call_ssh("mv %s %s >/dev/null 2>/dev/null", instex_fname,s2_prefix); 
-     instex_src[0]=instex_fname[0]=0; instex_cnt=0; 
- } 
-   
-       /* put last.phtml */ 
- void putlastout(void) 
- { 
-     int t; 
-     if(instex_cnt>0) instex_flush(); 
-     t=catfile(stdout,"%s/%s",s2_prefix,lastout); 
-     if(- t ==0) printf("Content-type: text/plain\r\n\r\n");
 
- } 
-   
- struct sockaddr_un sun; 
-   
-       /* returns >=0 if OK. */ 
- int kerneld(char *p, int bufsize) 
- { 
-     int sock, s, t, t1, l, *ip; 
-     struct timeval tv; 
-     fd_set rset; 
-      
-     sock=socket(PF_UNIX,SOCK_STREAM,0); 
-     s=connect(sock,(const struct sockaddr *)&sun,sizeof(sun)); 
-     if(s) {bad: close(sock); return -1;} 
-     ip=(int *) p; 
-     l =strlen(- p +sizeof(int)); *- ip =- l ;
-     s=write(sock,p,l+sizeof(int)); if(s!=l+sizeof(int)) goto bad; 
-     for(t=0, l=bufsize-1; t<l+sizeof(int);) { 
-       tv.tv_sec=2; tv.tv_usec=0; 
-       FD_ZERO(&rset); FD_SET(sock,&rset); 
-       if(select(sock+1,&rset,NULL,NULL,&tv)<=0) goto bad; 
-       t1=read(sock,p+t,l-t); 
-       if(t1+t<sizeof(int)) goto bad; 
-       l=*ip; if(l<=0) goto bad; 
-       if(l>=bufsize-sizeof(int)-4) user_error("cmd_output_too_long"); 
-       t+=t1; 
-     } 
-     p[l+sizeof(int)]=0; 
-     close(sock); 
-     return l+sizeof(int); 
- } 
-   
- void _daemoncmd(char *p) 
- { 
-     char buf[MAX_LINELEN+1+sizeof(int)]; 
-     char *p1, *p2, *p3; 
-     mystrncpy(buf+sizeof(int),p,sizeof(buf)-sizeof(int)); 
-     if(kerneld(buf,sizeof(buf))<0)  
-       internal_error("Daemon communication error."); 
-     p1=find_word_start(buf+sizeof(int)); 
-     p2=find_word_end(p1); if(*p2) *p2++=0; 
-       mystrncpy(p,p2,MAX_LINELEN); return; 
-     } 
-     p1=find_word_start(p2); p2=find_word_end(p1); if(*p2) *p2++=0; 
-     p2=find_word_start(p2); p3=find_word_end(p2);  
-     if(*p3) { 
-       *p3++=0; p3=find_word_start(p3); strip_trailing_spaces(p3); 
-       setvar("wims_error_data",p3); 
-     } 
-     switch(*p1) { 
-       case '1': user_error(p2); 
-       case '2': module_error(p2); 
-       case '3': 
-       default: internal_error(p2); 
-     } 
-     *p=0; 
- } 
-   
-