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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 various configuration routines for wims. */
  19.  
  20. /* Limitations are essentially for security reasons:
  21.  * to curb attacks by resource exhaustion of the server.
  22.  */
  23.  
  24. #include "wims.h"
  25.  
  26. /* maximal length of any module's variable definition file. */
  27. int VAR_DEF_LENGTH_LIMIT=50000;
  28. /* Limit for frames in an animation. */
  29. int ANIM_LIMIT=400;
  30. /* module log file length */
  31. int MODULE_LOG_LIMIT=102400;
  32. /* general log file length */
  33. int GEN_LOG_LIMIT=1024000;
  34. /* number of old log files */
  35. int OLD_LOG_FILES=2;
  36.  
  37. /* Resource limits */
  38. int threshold1=150; /* First load shreshold */
  39. int threshold2=300; /* Second load shreshold */
  40. int ispriority=0; /* whether the connection is from priority sites */
  41.  
  42. /* sessions not accessed more than these seconds will be erased. */
  43. int idle_time=5400;
  44. /* non-class sessions not accessed more than these seconds will be erased. */
  45. int idle_time2=2400;
  46. /* first-time sessions not accessed more than these seconds will be erased. */
  47. int idle_time3=900;
  48.  
  49. int rafalvl=10; /* anti-rapidfire severity */
  50.  
  51. /* Explanation: two real numbers a,b such tha * |a+b|>|a-b|*compare_precision
  52.  * will be considered equal in !ifvalue comparisons. */
  53. int DEFAULT_COMPARE_PRECISION=10000;
  54. /* Precision of printing (hence of all evaluations). */
  55. int DEFAULT_PRINT_PRECISION=8;
  56. /* Defaults for instex, insplot, etc. */
  57. char *DEFAULT_INS_FORMAT="gif";
  58. char *DEFAULT_ANIM_FORMAT="gif";
  59. char *DEFAULT_INS_DENSITY="100x100";
  60. char *DEFAULT_INSPLOT_FONT="small";
  61.  
  62. /* gnuplot intermediate graphics format */
  63. char *gnuplot_format="gif";
  64.  
  65. /* electronic address of site manager. */
  66. char *site_manager="wims@$httpd_HTTP_HOST";
  67. /* Main configure file, this name cannot be configured! */
  68. char *config_file="../log/wims.conf";
  69. char PATH[512];  /* directory settings */
  70. char *commonpath="/usr/local/bin:/usr/bin:/usr/games:/bin:/usr/bin/X11:/usr/X11R6/bin:/usr/texbin:/usr/local/texbin";
  71. char *gap_command="gap.sh -T -m 64M";
  72. char *maxima_command="maxima -X '--dynamic-space-size 512'";
  73. char *pari_command="gp -f -q -p 150000";
  74. char *octave_command="octave -Hfq --no-line-editing --no-window-system --silent";
  75. char *scilab_command="scilab -nwni";
  76. char *QRencode_command="qrencode -o";
  77.  
  78. /* default languages */
  79. char site_langbuf[]="en fr cn es it nl";
  80. char *site_languages=site_langbuf;
  81. /* Statistics shows up? */
  82. char *show_stat="no";
  83. /* Author names show up in search result? */
  84. char *show_author="no";
  85. /* Show user IP adress to supervisor */
  86. char *show_ip="yes";
  87. /* busy hours definition */
  88. char *busyhours="";
  89. /* Presentation theme */
  90. char *theme="standard";
  91. /* directory of session files */
  92. char session_dir[MAX_FNAME+1], s2_dir[MAX_FNAME+1];
  93. /* standardised header model for modules' output. Will be stored
  94.  * into the variable $wims_html_header. If the theme contains
  95.  * a file 'head.phtml', html_header will be defined by the address
  96.  * of this file  in subroutine define_html_header
  97.  */
  98. char *html_header="html/header.phtml";
  99. /* standardised about table for modules */
  100. char *module_about_file="html/module_about";
  101. /* title definition page */
  102. char *title_page="title.phtml";
  103. /* stardardised header menu bar, to be included in module pages
  104.  * via command !headmenu */
  105. char *header_menu="headmenu.phtml";
  106. char *header_menu_user="headmenu_user.phtml";
  107. char *header_menu_supervisor="headmenu_supervisor.phtml";
  108. /* standardised referer to wims home, to be included in
  109.  * module pages via command !homeref */
  110. char *home_referer="homeref.phtml";
  111. char *home_referer_user="homeref_user.phtml";
  112. char *home_referer_supervisor="homeref_supervisor.phtml";
  113. /* background color in standard reference tables */
  114. char *ref_bgcolor="#777777";
  115. /* link color */
  116. char *link_color="#004077";
  117. /* vlink color */
  118. char *vlink_color="#004077";
  119. /* link color in standard reference tables */
  120. char *ref_menucolor="#FFFFFF";
  121. /* background help button color */
  122. char *ref_button_help_bgcolor="#008f00";
  123. /* background help button color */
  124. char *ref_button_help_color="#FFFFFF";
  125.   /* button background color */
  126. char *ref_button_bgcolor="#666666";
  127.   /* button color */
  128. char *ref_button_color="#FFFFFF";
  129. /* module log disabled by default */
  130. int modlog=0;
  131. /* name of the variable definition file for every module.
  132.  * It is this file which defines the presence of the module.
  133. * Better do not make it configurable.
  134. */
  135. char var_def_file[256];
  136. /* name of variable init file. Processed only when cmd=new or renew. */
  137. char *var_init_file="var.init";
  138. /* name of variable calculation file. Parsed at each call. */
  139. char *main_var_proc_file="var.proc";
  140. /* name of the main (programmable) html file. */
  141. char *html_file="main.phtml";
  142. /* Introduction page name */
  143. char *intro_file="intro.phtml";
  144. /* Reference page */
  145. char *ref_file="wims_ref.phtml";
  146. /* script to process different inserts.
  147.  * The two consecutive points in the name prohibits ordinary
  148.  * user execution of the script.
  149.  */
  150. char *insdraw_processor="insdraw..processor";
  151. char *insplot_processor="insplot..processor";
  152. char *tex2gif="bin/tex..gif";
  153. char *priority=""; /* IPs of priority sites */
  154. char *texgif_fontdir="w/texgif";
  155. char *texgif_texheader="mathfonts/header";
  156. char *bgcolor="#E8E8E8"; /* page background color */
  157. char *bgimg="";  /* page background image file */
  158. char *pagecss="-theme-";  /* style sheet file */
  159. char *theme_icon="default";  /* icon */
  160. char *usecookie="no";  /* whether to send cookies to anon requests */
  161. char *mail_opt="";  /* !mailto options */
  162. char nodeip[256]="";  /* ip of cluster node if relevant */
  163. char temp_log[MAX_FNAME+1]; /* temp log file name */
  164.  /* 0: low; 1: high; 2: MathML */
  165. int mathalign_base=0;  /* Not use <sup> for middle alignment */
  166. char *disable_zoom="no";  /* yes/no:  default zooming allowed (if enabled via "useropts")  */
  167. char *disable_mathml="no";
  168. int spec_font=0; /* choose of some fonts*/
  169.  /* special font can be configured in log/wims.conf with variable special_font*/
  170. char *special_font="letter-spacing:0.1em;line-height:2.7em;word-spacing:0.8em;font-family:OpenDyslexic3,OpenDyslexic,sans-serif !important;";
  171. int backup_hour=-1; /* Hour for daily backup; -1 means no backup. */
  172. int site_accounting=0; /* whether accounting should be activated */
  173. int examlog_limit=7; /* number of logged exam sessions for each student */
  174.  
  175. /* Automatic module update */
  176. char *mu_auto="none";
  177. char *mu_cat="all";
  178. char *mu_delay="3";
  179. char *mu_site="http://wims.unice.fr/download/modules";
  180. char *mu_zone="all";
  181. char *mu_download_site="unice,wimsedu";
  182. char *mu_publish_site="unice";
  183.  
  184. /* keywords destinated to robots */
  185. char *site_keywords="interactive mathematics, interactive math, server side interactivity";
  186. char *site_description="interactive exercises, online calculators and plotters, mathematical recreation and games";
  187.  
  188. /* class and document authorization */
  189. int class_quota=100;
  190. int superclass_quota=100;
  191. int doc_quota=32;
  192. char *class_regpass="email,email,deny";
  193. char *doc_regpass="";
  194.  
  195. /* Where to find programs; if your httpd sets /bin:/usr/bin in PATH,
  196.  * this should be OK.
  197.  */
  198. char *sed_prog="sed";
  199. char *tr_prog="tr";
  200. char *awk_prog="awk";
  201.  
  202.   /* myname */
  203. char *cgi_name="wims.cgi";
  204. char *aliased_cgi="no";
  205. char *aliased_getfile="yes";
  206.  
  207.   /* Limits for classes and participants */
  208. int class_limit=200; /* limit of number of classes */
  209. int user_limit=5000; /* limit of total number of registered users */
  210. int class_user_limit=300; /* limit of users in one class */
  211. int forum_limit=100;  /* Limit of message boards */
  212.  
  213. CONFIG_DATA main_config[]={
  214.       {"PATH",0, &commonpath},
  215.       {"QRencode_command",2, &QRencode_command},
  216.       {"aliased_cgi",0, &aliased_cgi},
  217.       {"aliased_getfile",0, &aliased_getfile},
  218.       {"backup_hour",1, &backup_hour},
  219.       {"busyhours",0, &busyhours},
  220.       {"cgi_name",0, &cgi_name},
  221.       {"class_limit",1, &class_limit},
  222.       {"class_quota",1, &class_quota},
  223.       {"class_regpass",0, &class_regpass},
  224.       {"class_user_limit",1, &class_user_limit},
  225.       {"css",0, &pagecss},
  226.       {"default_anim_format",0, &DEFAULT_ANIM_FORMAT},
  227.       {"default_ins_format",0, &DEFAULT_INS_FORMAT},
  228.       {"default_insplot_font",0, &DEFAULT_INSPLOT_FONT},
  229.       {"default_texposition",1, &mathalign_base},
  230.       {"devel_modules",0, &devel_modules},
  231.       {"doc_quota",1, &doc_quota},
  232.       {"doc_regpass",0, &doc_regpass},
  233.       {"examlog_limit",1, &examlog_limit},
  234.       {"forum_limit",1, &forum_limit},
  235.       {"gap_command",2, &gap_command},
  236.       {"general_log_limit",1, &GEN_LOG_LIMIT},
  237.       {"gnuplot_format",0, &gnuplot_format},
  238.       {"home_module",0, &home_module},
  239.       {"idle_time",1, &idle_time},
  240.       {"idle_time2",1, &idle_time2},
  241.       {"idle_time3",1, &idle_time3},
  242.       {"insdraw_processor",0, &insdraw_processor},
  243.       {"link_color",0, &link_color},
  244.       {"mail_opt",0, &mail_opt},
  245.       {"manager_https",1, &manager_https},
  246.       {"manager_site",0, &manager_site},
  247.       {"maxima_command",2, &maxima_command},
  248.       {"module_log",1, &modlog},
  249.       {"module_log_limit",1, &MODULE_LOG_LIMIT},
  250.       {"mu_auto",0, &mu_auto},
  251.       {"mu_cat",0, &mu_cat},
  252.       {"mu_delay",0, &mu_delay},
  253.       {"mu_download_site",0, &mu_download_site},
  254.       {"mu_publish_site",0, &mu_publish_site},
  255.       {"mu_site",0, &mu_site},
  256.       {"mu_zone",0, &mu_zone},
  257.       {"octave_command",2, &octave_command},
  258.       {"old_log_files",1, &OLD_LOG_FILES},
  259.       {"page_bgcolor",0, &bgcolor},
  260.       {"page_bgimg",0, &bgimg},
  261.       {"pari_command",2, &pari_command},
  262.       {"priority",0, &priority},
  263.       {"rafale_level",1, &rafalvl},
  264.       {"ref_bgcolor",0, &ref_bgcolor},
  265.       {"ref_button_bgcolor",0, &ref_button_bgcolor},
  266.       {"ref_button_color",0, &ref_button_color},
  267.       {"ref_button_help_bgcolor",0, &ref_button_help_bgcolor},
  268.       {"ref_button_help_color",0, &ref_button_help_color},
  269.       {"ref_menucolor",0, &ref_menucolor},
  270.       {"rlimit_cpu",1, &rlimit_cpu},
  271.       {"scilab_command",2, &scilab_command},
  272.       {"show_author",0, &show_author},
  273.       {"show_ip",0, &show_ip},
  274.       {"show_stat",0, &show_stat},
  275.       {"site_accounting",1, &site_accounting},
  276.       {"site_description",0, &site_description},
  277.       {"site_keywords",0, &site_keywords},
  278.       {"site_languages",0, &site_languages},
  279.       {"site_manager",0, &site_manager},
  280.       {"superclass_quota",1, &superclass_quota},
  281.       {"texbasesize",1, &texbasesize},
  282.       {"theme",0, &theme},
  283.       {"theme_icon",0, &theme_icon},
  284.       {"threshold1",1, &threshold1},
  285.       {"threshold2",1, &threshold2},
  286.       {"tmp_debug",0, &tmp_debug},
  287.       {"tmp_debug_var",0, &tmp_debug_var},
  288.       {"trusted_modules",0, &trusted_modules},
  289.       {"usecookie",0, &usecookie},
  290.       {"user_limit",1, &user_limit},
  291.       {"var_def_length_limit",1, &VAR_DEF_LENGTH_LIMIT},
  292.       {"vlink_color",0, &vlink_color},
  293.       {"workfile_limit",1, &WORKFILE_LIMIT}
  294. };
  295. int MAIN_CONFIG_NO=(sizeof(main_config)/sizeof(main_config[0]));
  296.  
  297. /* processes the list of languages supported on the site */
  298. void language_list(void)
  299. {
  300.   int i,k;
  301.   char *lbuf[MAX_LANGUAGES];
  302.   calc_tolower(site_languages); items2words(site_languages);
  303.   setvar("wims_site_languages",site_languages);
  304.   i=cutwords(site_languages,lbuf,MAX_LANGUAGES);
  305.   available_lang_no=i;
  306.   for(i=k=0;i<available_lang_no;i++) {
  307.     if(strlen(lbuf[i])==2) memmove(available_lang[k++],lbuf[i],3);
  308.   }
  309.   if(k>0) memmove(lang,available_lang[0],3);
  310. }
  311.  
  312. char hostname[256];
  313. int html_call=0;
  314.  
  315. /* determine the http reference name of the server */
  316. void determine_ref_name(void)
  317. {
  318.   char *s1, *s2, *p, *pl;
  319.   char buf[MAX_LINELEN+1];
  320.   int len;
  321.  
  322.   hostname[0]=0;
  323.   s1=getvar("httpd_HTTP_HOST");s2=getvar("httpd_SCRIPT_NAME");
  324.   gethostname(hostname,sizeof(hostname));
  325.   if(hostname[0]==0 && s1 && *s1!=0) mystrncpy(hostname,s1,sizeof(hostname));
  326.   if(s1==NULL || *s1==0) s1=hostname;
  327.   setvar("wims_myhostname",hostname);
  328.   ref_base[0]=0;
  329.   if(s2!=NULL) mystrncpy(buf,s2,sizeof(buf));
  330.   else buf[0]=0;
  331.   if(s1!=NULL && *buf=='/') {
  332.     p=strrchr(buf,'/'); if(p==NULL) p=buf; else *p++=0;
  333.     if(strcmp(p,cgi_name)!=0 && strlen(p)>4 &&
  334.        p[2]=='_' && islower(p[0]) && islower(p[1])) {
  335.       pre_language[0]=p[0];pre_language[1]=p[1];pre_language[2]=0;
  336.       p[2]=0; setenv("HTTP_ACCEPT_LANGUAGE",p,1); pl=p; p+=3;
  337.       s2=strrchr(p,'.'); if(s2!=NULL) {
  338.         *s2=0; if(strcasecmp(s2+1,"cgi")!=0) html_call=1;
  339.       }
  340.       s2=p; while((s2=strpbrk(s2,"@~"))!=NULL) *s2='/';
  341.       if(strncmp(p,"doc/",4)==0) {
  342.         char *pd, *pb;
  343.         pd=p+4;
  344.         if(*pd) {
  345.           pb=strchr(pd,'/');
  346.           if(pb) *pb++=0; else pb="main";
  347.           setvar("doc",pd); setvar("block",pb); setvar("job","read");
  348.         }
  349.         setvar(ro_name[ro_module],mkfname(NULL,"adm/doc.%s",pl));
  350.       }
  351.       else setvar(ro_name[ro_module],p);
  352.       module_defined=1;
  353.     }
  354.     p=strchr(buf,'_');
  355.     if(p!=NULL && p>buf+3 && myislower(*(p-1)) && myislower(*(p-2))
  356.          && *(p-3)=='/' && myisalpha(*(p+1))) {
  357.       char *pp;
  358.       for(pp=p+1; myisalnum(*pp); pp++){};
  359.       if(*pp=='/') *(p-3)=0;
  360.     }
  361.     snprintf(ref_name,sizeof(ref_name)-2,"http://%s%s/%s",s1,buf,cgi_name);
  362.     mystrncpy(ref_base,ref_name,sizeof(ref_base)-2);
  363.     p=strrchr(ref_base,'/');
  364.     if(p!=NULL) *(p+1)=0;
  365.   }
  366.   else mystrncpy(ref_name,cgi_name,sizeof(ref_name)-1);
  367.  
  368.     // XSS PROTECTION (remove unwanted chars to avoid a possible XSS hack)
  369.     // Search for a first occurence of Forbidden chars
  370.     len = strcspn(ref_name, "<>'\"\\");
  371.     // Give only the ref_name before forbidden chars
  372.   mystrncpy(ref_name,ref_name,len+1);
  373.  
  374.   setvar("wims_ref_name",ref_name);
  375. }
  376.  
  377.       /* Read and interprete wims configuration file. */
  378. void main_configure(void)
  379. {
  380.   int i;
  381.   char *conf_buf,*e,*p,*p2,*p3;
  382.   char buf[MAX_LINELEN+1];
  383.  
  384.   conf_buf=readfile(config_file,NULL,WORKFILE_LIMIT);
  385.   if(conf_buf==NULL) goto fileend;
  386.   e=conf_buf-1; while(e) {
  387.     p=e+1; e=strchr(p,'\n'); if(e) *e=0;
  388.     p=find_word_start(p);
  389.     if(*p==0 || *p==comment_prefix_char) continue; /* empty or comment line */
  390.     p2=strchr(p,'=');
  391.     if(p2==NULL) continue; /* syntax error */
  392.     *p2=0; *find_word_end(p)=0; p2=find_word_start(p2+1);
  393.     p3=p2+strlen(p2); while(myislspace(p3[-1])) p3--;
  394.     while(p3[-1]=='\\') p3--;
  395.     *p3=0;
  396.     i=search_list(main_config,MAIN_CONFIG_NO,sizeof(main_config[0]),p);
  397.     if(i<0) continue; /* name non-defined */
  398.     if(main_config[i].is_integer==1) {
  399.       int *ip;
  400.       ip=main_config[i].address;
  401.       *ip=atoi(p2); if(*ip<0) *ip=0;
  402.     }
  403.     else {
  404.       char **cp;
  405.       cp=main_config[i].address;
  406.       *cp=p2;
  407.     }
  408.   }
  409.   fileend:
  410.   setenv("session_base_dir",session_dir,1);
  411.   determine_ref_name();
  412.   language_list();
  413.   for(i=0;i<MAIN_CONFIG_NO;i++) {
  414.     char **pp;
  415.     if(main_config[i].is_integer==2) {
  416.       pp=main_config[i].address;
  417.       setenv(main_config[i].name,*pp,1);
  418.     }
  419.   }
  420.         /* check priority */
  421.   if(priority[0] && checkhost(priority)>0) ispriority=1;
  422.   (void)getcwd(cwdbuf,sizeof(cwdbuf)); setvar("httpd_PWD",cwdbuf);
  423.   setenv("wims_server_base",cwdbuf,1);
  424.   p=strrchr(cwdbuf,'/');
  425.   if(p!=NULL && strcmp(p,"/public_html")==0) {
  426.     *p=0; snprintf(PATH,sizeof(PATH),"%s/other/bin:%s",cwdbuf,commonpath);
  427.     force_setvar("wims_home",cwdbuf);
  428.     *p='/';
  429.   }
  430.   else {
  431.     snprintf(PATH,sizeof(PATH),"%s/../other/bin:%s",cwdbuf,commonpath);
  432.     force_setvar("wims_home",cwdbuf);
  433.   }
  434.   setenv("PATH",PATH,1);
  435.   p=getvar("httpd_SERVER_SOFTWARE");
  436.   if(p && (strstr(p,"Apache"))!=NULL && strstr(aliased_getfile,"yes")!=NULL)
  437.     good_httpd=1;
  438.   accessfile(buf,"r","../tmp/log/myip");
  439.   *find_word_end(buf)=0;
  440.   if(buf[0]) {
  441.     snprintf(nodeip,sizeof(nodeip),"%s",buf);
  442.     snprintf(temp_log,sizeof(temp_log),"%s.%s",TEMP_LOG_FILE,nodeip);
  443.     force_setvar("wims_priv_nodeip",nodeip);
  444.   }
  445.   else {
  446.     nodeip[0]=0;
  447.     snprintf(temp_log,sizeof(temp_log),"%s",TEMP_LOG_FILE);
  448.   }
  449. }
  450.  
  451. struct {
  452.   int rname;
  453.   int *rval;
  454. } resource_table[]={
  455. #ifdef RLIMIT_CPU
  456.       {RLIMIT_CPU, &rlimit_cpu},
  457. #endif
  458. #ifdef RLIMIT_FSIZE
  459.       {RLIMIT_FSIZE, &rlimit_fsize},
  460. #endif
  461. #ifdef RLIMIT_AS
  462.       {RLIMIT_AS, &rlimit_as},
  463. #endif
  464. #ifdef RLIMIT_DATA
  465.       {RLIMIT_DATA, &rlimit_data},
  466. #endif
  467. #ifdef RLIMIT_STACK
  468.       {RLIMIT_STACK, &rlimit_stack},
  469. #endif
  470. #ifdef RLIMIT_CORE
  471.       {RLIMIT_CORE, &rlimit_core},
  472. #endif
  473. #ifdef RLIMIT_RSS
  474.       {RLIMIT_RSS, &rlimit_rss},
  475. #endif
  476. #ifdef RLIMIT_NPROC
  477.       {RLIMIT_NPROC, &rlimit_nproc},
  478. #endif
  479. #ifdef RLIMIT_NOFILE
  480.       {RLIMIT_NOFILE, &rlimit_nofile},
  481. #endif
  482. #ifdef RLIMIT_MEMLOCK
  483.       {RLIMIT_MEMLOCK, &rlimit_memlock}
  484. #endif
  485. };
  486. #define RESOURCE_NO (sizeof(resource_table)/sizeof(resource_table[0]))
  487.  
  488. /* set system resource limits */
  489. void set_rlimits(void)
  490. {
  491.   int i;
  492.   struct rlimit rlim;
  493.  
  494.   for(i=0;i<RESOURCE_NO;i++) {
  495.     rlim.rlim_cur=rlim.rlim_max=*(resource_table[i].rval);
  496.     setrlimit(resource_table[i].rname,&rlim);
  497.     if(resource_table[i].rname==RLIMIT_CPU) {
  498.       setvar("wims_cpu_limit",int2str(rlim.rlim_max));
  499.       initalarm();
  500.     }
  501.   }
  502. }
  503.  
  504. struct {
  505.   char *name;
  506.   int is_integer;
  507.   void *default_value;
  508. } module_default[]={
  509.   {"anim_format",0, &DEFAULT_ANIM_FORMAT},
  510.   {"gnuplot_format",0, &gnuplot_format},
  511.   {"ins_anim_limit",1, &ANIM_LIMIT},
  512.   {"ins_density",0, &DEFAULT_INS_DENSITY},
  513.   {"ins_format",0, &DEFAULT_INS_FORMAT},
  514.   {"insplot_font",0, &DEFAULT_INSPLOT_FONT},
  515.   {"wims_busyhours",0, &busyhours},
  516.   {"wims_class_limit",1, &class_limit},
  517.   {"wims_class_quota",1, &class_quota},
  518.   {"wims_class_regpass",0, &class_regpass},
  519.   {"wims_class_user_limit",1, &class_user_limit},
  520.   {"wims_compare_precision",1, &DEFAULT_COMPARE_PRECISION},
  521.   {"wims_devel_modules",0, &devel_modules},
  522.   {"wims_doc_quota",1, &doc_quota},
  523.   {"wims_doc_regpass",0, &doc_regpass},
  524.   {"wims_examlog_limit",1, &examlog_limit},
  525.   {"wims_forum_limit",1, &forum_limit},
  526.   {"wims_bgcolor",0, &bgcolor},
  527.   {"wims_bgimg",0, &bgimg},
  528.   {"wims_css",0, &pagecss},
  529.   {"wims_link_color",0, &link_color},
  530.   {"wims_print_precision", 1, &DEFAULT_PRINT_PRECISION},
  531.   {"wims_ref_bgcolor",0, &ref_bgcolor},
  532.   {"wims_ref_button_bgcolor",0, &ref_button_bgcolor},
  533.   {"wims_ref_button_color",0, &ref_button_color},
  534.   {"wims_ref_button_help_bgcolor",0, &ref_button_help_bgcolor},
  535.   {"wims_ref_button_help_color",0, &ref_button_help_color},
  536.   {"wims_ref_menucolor",0, &ref_menucolor},
  537.   {"wims_ref_menucolor",0, &ref_menucolor},
  538.   {"wims_show_author",0, &show_author},
  539.   {"wims_show_ip",0, &show_ip},
  540.   {"wims_show_stat",0, &show_stat},
  541.   {"wims_site_description",0, &site_description},
  542.   {"wims_site_keywords",0, &site_keywords},
  543.   {"wims_site_manager",0, &site_manager},
  544.   {"wims_texalign",1, &mathalign_base},
  545.   {"wims_texbasesize",1, &texbasesize},
  546.   {"wims_theme",0, &theme},
  547.   {"wims_theme_icon",0, &theme_icon},
  548.   {"wims_tmp_debug",0, &tmp_debug},
  549.   {"wims_usecookie",0, &usecookie},
  550.   {"wims_user_limit",1, &user_limit},
  551.   {"wims_vlink_color",0, &vlink_color},
  552.   {"wims_superclass_quota", 1, &superclass_quota}
  553. };
  554. #define MODULE_DEFAULT_NO (sizeof(module_default)/sizeof(module_default[0]))
  555.  
  556. /* Set defaults for module, and set corresponding variables. */
  557. void module_configure(void)
  558. {
  559.   int i;
  560.   confset=1;
  561.   for(i=0;i<MODULE_DEFAULT_NO;i++) {
  562.     if(module_default[i].is_integer) {
  563.       int j, *jp;
  564.       jp=module_default[i].default_value;
  565.       j=*jp; if(j<0) j=0;
  566.       setvar(module_default[i].name,int2str(j));
  567.     }
  568.     else {
  569.       char **cp;
  570.       cp=module_default[i].default_value;
  571.       setvar(module_default[i].name,*cp);
  572.     }
  573.   }
  574.   setenv("texgif_fontdir",texgif_fontdir,1);
  575.   setenv("texgif_texheader",texgif_texheader,1);
  576.   setvar("wims_texsize","0");
  577.   setvar("disable_zoom","0");
  578.   setvar("disable_mathml","0");
  579.   setvar("force_mathml","0");
  580.   /* if 'force_mathml=yes' , a check should be done on the value of 'disable_mathml'.
  581.      so it's not fool-proof.
  582.   */
  583.   confset=0;
  584. }
  585.  
  586. char *modindex[]={
  587.   "address",
  588.   "author",
  589.   "category",
  590.   "copyright",
  591.   "data",
  592.   "description",
  593.   "description_ca",
  594.   "description_cn",
  595.   "description_de",
  596.   "description_en",
  597.   "description_es",
  598.   "description_fr",
  599.   "description_it",
  600.   "description_nl",
  601.   "description_si",
  602.   "description_tw",
  603.   "domain",
  604.   "help",
  605.   "keywords",
  606.   "keywords_ca",
  607.   "keywords_cn",
  608.   "keywords_de",
  609.   "keywords_en",
  610.   "keywords_es",
  611.   "keywords_fr",
  612.   "keywords_it",
  613.   "keywords_nl",
  614.   "keywords_si",
  615.   "keywords_tw",
  616.   "language",
  617.   "level",
  618.   "maintainer",
  619.   "maintainer_address",
  620.   "mode",
  621.   "require",
  622.   "scoring",
  623.   "title",
  624.   "title_ca",
  625.   "title_cn",
  626.   "title_de",
  627.   "title_en",
  628.   "title_es",
  629.   "title_fr",
  630.   "title_it",
  631.   "title_nl",
  632.   "title_si",
  633.   "title_tw",
  634.   "translator",
  635.   "translator_address",
  636.   "translator_address_ca",
  637.   "translator_address_cn",
  638.   "translator_address_de",
  639.   "translator_address_en",
  640.   "translator_address_es",
  641.   "translator_address_fr",
  642.   "translator_address_it",
  643.   "translator_address_nl",
  644.   "translator_address_si",
  645.   "translator_address_tw",
  646.   "translator_ca",
  647.   "translator_cn",
  648.   "translator_de",
  649.   "translator_en",
  650.   "translator_es",
  651.   "translator_fr",
  652.   "translator_it",
  653.   "translator_nl",
  654.   "translator_si",
  655.   "translator_tw",
  656.   "vardef",
  657.   "version",
  658.   "wims_version",
  659. };
  660. int MODINDEX_NO=(sizeof(modindex)/sizeof(modindex[0]));
  661.  
  662. char *module_special_file[]={
  663.   "intro","help"
  664. };
  665. #define MODSPEC_NO (sizeof(module_special_file)/sizeof(module_special_file[0]))
  666.  
  667. /* read and treat module's INDEX file */
  668. void module_index(void)
  669. {
  670.   char buf[MAX_NAMELEN+1], ind_buf[MAX_LINELEN+1];
  671.   char *e, *p, *p2, *ft;
  672.   double v1, v2;
  673.   int i,l;
  674.   long indf_len;
  675.  
  676.   memmove(var_def_file,default_var_def,strlen(default_var_def)+1);
  677.   ft=readfile(mkfname(NULL,"%s/INDEX",module_prefix),
  678.           ind_buf,sizeof(ind_buf));
  679.   if(ft==NULL) ft=readfile(mkfname(NULL,"%s/index",module_prefix),
  680.                      ind_buf,sizeof(ind_buf));
  681.   if(ft==NULL) return;
  682.   e=ind_buf-1; indf_len=strlen(ind_buf);
  683.   for(l=0; e<ind_buf+indf_len && e!=NULL ;l++) {
  684.     p=e+1; e=strchr(p,'\n'); if(e!=NULL) *e=0;
  685.     strip_trailing_spaces(p); p=find_word_start(p);
  686.     if(*p==0 || *p==comment_prefix_char) continue; /* empty or comment line */
  687.     p2=strchr(p,'=');
  688.     if(p2==NULL) continue; /* syntax error */
  689.     *p2=0; *find_word_end(p)=0; p2=find_word_start(p2+1);
  690.     i=search_list(modindex,MODINDEX_NO,sizeof(modindex[0]),p);
  691.     if(i<0) continue; /* name not in list */
  692.     snprintf(buf,sizeof(buf),"module_%s",p);
  693.     setvar(buf,p2);
  694.   }
  695.   if(mode!=mode_default) {
  696.     char *s;
  697.     s=getvar("module_mode");
  698.     if(s==NULL) {
  699.       nomode: mode=mode_default; force_setvar("wims_mode","");
  700.     }
  701.     else switch(mode) {
  702.       case mode_popup: {
  703.         if(strstr(s,"popup")==NULL) goto nomode;
  704.         else break;
  705.       }
  706.       case mode_raw: {
  707.         if(strstr(s,"raw")==NULL) goto nomode;
  708.         else break;
  709.       }
  710.       default: break;
  711.     }
  712.   }
  713. /* test for existence of some special files in module's directory */
  714.   for(i=0;i<MODSPEC_NO;i++) {
  715.     if(ftest(mkfname(NULL,"%s/%s.phtml",module_prefix,module_special_file[i]))
  716.       ==is_file) {
  717.       snprintf(buf,sizeof(buf),"module_has_%s",module_special_file[i]);
  718.       setvar(buf,"yes");
  719.     }
  720.   }
  721.   p=getvar("module_language"); if(p==NULL || *p==0) setvar("module_language","en");
  722.   setvar("module_has_about","yes"); /* now we have default about.phtml */
  723. /* Set var_def */
  724.   p=getvar("module_vardef");
  725.   if(p!=NULL && *p!=0) mystrncpy(var_def_file,p,sizeof(var_def_file));
  726.   p=getvar("module_wims_version"); if(p!=NULL && *p!=0) {
  727.     v1=atof(p); v2=atof(wims_version);
  728.     if(isfinite(v1) && isfinite(v2) &&
  729.         (v1>v2 || (v1==v2 && strcmp(find_word_start(p),wims_version)>0))) {
  730.       setvar("module_wims_version",p);
  731.       setvar("wims_version",wims_version);
  732.       module_error("antidated_version");
  733.     }
  734.   }
  735.   if(isdevelmodule) {
  736.     p=getvar("module_scoring");
  737.     if(p==NULL || strcasecmp(p,"yes")!=0) isdevelmodule=0;
  738.   }
  739. }
  740.  
  741. /* Set up a unique job identity as a 4-bytes integer */
  742. unsigned long create_job_ident(void)
  743. {
  744. /* unsigned long it; // 64-bit compatibility: take away _long_ */
  745.   unsigned long it;
  746.   int i;
  747. /* Is this enough to guarantee uniqueness? */
  748.  
  749.   it=(nowtime<<16)+(getpid()&0xffff);
  750. /* The encryption is very simple. */
  751.   it=it^0x5a3c9671;
  752.   for(i=0;i<MAX_SESRANDOM;i++) sesrandomtab[i]=random();
  753.     /* ensure that the result will be a 4-bytes integer gives random problem on 32 bits
  754.     return it;*/
  755.   return it & 0xffffffff;
  756. }
  757.  
  758. /* Setup a job identifier */
  759. void set_job_ident(void)
  760. {
  761.   unsigned long l,r;
  762.  
  763.   l=create_job_ident();
  764.   /* the last 4 bits always make 0xA. A bug of glibc random()? */
  765.   r=random()>>4;
  766.   snprintf(job_identifier,sizeof(job_identifier),"%lX%08lX",r,l);
  767.   var_noexport=1;
  768.   setvar("job_identifier",job_identifier);
  769.   var_noexport=0;
  770. }
  771.  
  772. /* define the variable $wims_html_header */
  773. void define_html_header(void)
  774. {
  775.   char *sp, *cp, *ladirection, *mp, *s2;
  776.   char buf[MAX_LINELEN+1];
  777.   /*char *nocache="<meta http-equiv=\"Pragma\" content=\"no-cache\" />\n\
  778. <meta http-equiv=\"Cache-Control\" content=\"no-cache\" />\n";*/
  779.   int noc;
  780.   noc=0;
  781.   cp=getvar("wims_expire"); if(cp!=NULL) goto css;
  782.   if(!robot_access && cmd_type==cmd_intro && isclassmodule) {
  783.     sp=getvar("special_parm"); if(sp==NULL) sp="";
  784.     if(strcmp(sp,".nocache.")==0) {
  785.       force_setvar("special_parm",""); noc=1;
  786.     }
  787.     if(!noc) {
  788.       mp=getvar(ro_name[ro_module]);
  789.       if(mp!=NULL && strncmp(mp,"devel/",strlen("devel/"))==0) noc=1;
  790.     }
  791.   }
  792.   css: setvar("wims_CSS","");
  793.   cp=getvar("wims_css");
  794.   ladirection=getvar("wims_main_dirn");
  795.   if (strcmp(ladirection,"ltr")==0) ladirection="";
  796.   if(!robot_access && cp!=NULL && *cp!=0 && strstr(cp,"---")==NULL) {
  797.     char *nbuf;
  798.     cp=find_word_start(cp);
  799.     if(strchr(cp,'/')==NULL) {
  800.       char *pc, *th, *ti; int st=0;
  801.       pc=getvar("wims_class");
  802.       if(pc!=NULL && *pc!=0 && strcmp(cp,"class")==0) {
  803.         nbuf=mkfname(NULL,"%s/%s/css",class_base,pc);
  804.         th=getvar("class_theme");ti=getvar("class_theme_icon") ;
  805.         if(th==NULL || *th==0) th=getvar("wims_theme");
  806.         st=1;
  807.         if(ti==NULL || *ti==0) ti=getvar("wims_theme_icon");
  808.       }
  809.       else {/* Il faut peut-être changer là aussi pour direction */
  810.         nbuf=mkfname(NULL,"html/css/%s/%s.css",lang,cp);
  811.         th=getvar("wims_theme");
  812.         ti=getvar("wims_theme_icon");
  813.       }
  814.       if(strcmp(cp,"-theme-")==0 && strchr(th,'.')==NULL) {
  815.         if(th==NULL || *th==0) th="default";
  816.         nbuf=mkfname(NULL,"html/themes/%s/css%s.css",th,ladirection);
  817.       }
  818.       if(readfile(nbuf,tmplbuf,sizeof(tmplbuf))) {
  819.       }
  820.       else {
  821.         th=getvar("wims_theme");
  822.         nbuf=mkfname(NULL,"html/themes/%s/css%s.css",th,ladirection);
  823.       }
  824.       if(readfile(nbuf,tmplbuf,sizeof(tmplbuf))) {
  825.         if (st) {snprintf(buf,sizeof(buf),"<style type=\"text/css\"><!--\n\
  826. %s\n\
  827. --></style>",tmplbuf); }
  828.         else {
  829.           snprintf(buf,sizeof(buf),"<link href=\"%s\" rel=\"stylesheet\" type=\"text/css\" />\n\
  830. <link href=\"gifs/themes/%s/icon-min.css\" rel=\"stylesheet\" type=\"text/css\" />",nbuf,ti);
  831.         }
  832.         setvar("wims_CSS",buf);
  833.       }
  834.       else {
  835.  
  836.       }
  837. /* case of theme */
  838.       if (th) {
  839.         s2=getvar("module_title");
  840.         if(s2!=NULL && *s2!=0) {
  841.           mystrncpy(nbuf,s2,sizeof(buf)); calc_detag(nbuf); setvar("module_title2",nbuf);
  842.         };
  843.         nbuf=mkfname(NULL,"html/themes/%s/htmlheader.phtml",th) ;
  844.         if (readfile(nbuf,tmplbuf,sizeof(tmplbuf))) html_header=nbuf ;
  845.       }
  846.     }
  847.   }
  848.   if(readfile(html_header,buf,sizeof(buf))) setvar("wims_html_header",buf);
  849. }
  850.  
  851. /* Set Session Dir */
  852. void setsesdir(char *d)
  853. {
  854.   char buf[MAX_FNAME+1];
  855.   if(strstr(d,parent_dir_string)!=NULL) {
  856.     force_setvar("wims_session",robot_session);
  857.     mystrncpy(buf,robot_session,sizeof(buf));
  858.     mkfname(session_dir,"../tmp");
  859.     mkfname(s2_dir,"../tmp");
  860.   }
  861.   else {
  862.     force_setvar("wims_session",d);
  863.     snprintf(buf,sizeof(buf),"%s/%s",SESSION_BASE,d);
  864.     mkfname(session_dir,"../%s",SESSION_BASE);
  865. /* mkfname(s2_dir,"../%s",S2_BASE); */
  866.   }
  867.   force_setvar("wims_sesdir",buf);
  868. }
  869.