Subversion Repositories wimsdev

Rev

Rev 17170 | Go to most recent revision | Blame | Compare with Previous | Last modification | View Log | RSS feed

  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. /* variables shared with wimslog.c */
  26. #include "commun.h"
  27.  
  28. /* maximal length of any module's variable definition file. */
  29. int VAR_DEF_LENGTH_LIMIT=50000;
  30. /* Limit for frames in an animation. */
  31. int ANIM_LIMIT=400;
  32.  
  33.  
  34. /* Resource limits */
  35. int threshold1=150; /* First load threshold */
  36. int threshold2=300; /* Second load threshold */
  37. int ispriority=0; /* whether the connection is from priority sites */
  38.  
  39. int rafalvl=10; /* anti-rapidfire severity */
  40.  
  41. /* Explanation: two real numbers a,b such as * |a+b|>|a-b|*compare_precision
  42.  * will be considered equal in !ifvalue comparisons. */
  43. int DEFAULT_COMPARE_PRECISION=10000;
  44. /* Precision of printing (hence of all evaluations). */
  45. int DEFAULT_PRINT_PRECISION=8;
  46. /* Defaults for instex, insplot, etc. */
  47. char *DEFAULT_INS_FORMAT="gif";
  48. char *DEFAULT_ANIM_FORMAT="gif";
  49. char *DEFAULT_INS_DENSITY="100x100";
  50. char *DEFAULT_INSPLOT_FONT="small";
  51.  
  52. /* gnuplot intermediate graphics format */
  53. char *gnuplot_format="gif";
  54.  
  55. /* electronic address of site manager. */
  56. char *site_manager="wims@$httpd_HTTP_HOST";
  57. /* Main configure file, this name cannot be configured! */
  58. char *config_file="../log/wims.conf";
  59. char PATH[512];  /* directory settings */
  60. char *commonpath="/usr/local/bin:/usr/bin:/usr/games:/bin:/usr/bin/X11:/usr/X11R6/bin:/usr/texbin:/usr/local/texbin";
  61. char *gap_command="gap.sh -T -m 64M";
  62. char *maxima_command="maxima -X '--dynamic-space-size 512'";
  63. char *pari_command="gp -f -q -p 150000";
  64. char *octave_command="octave -Hq --no-line-editing --no-window-system --silent";
  65. char *scilab_command="scilab -nwni";
  66. char *QRencode_command="qrencode -o";
  67.  
  68. /* default languages */
  69. char site_langbuf[]="en fr es it nl ca si de cn";
  70. char *site_languages=site_langbuf;
  71. /* Statistics shows up? */
  72. char *show_stat="yes";
  73. /* Author names show up in search result? */
  74. char *show_author="no";
  75. /* Show user IP address to supervisor */
  76. char *show_ip="yes";
  77. /* busy hours definition */
  78. char *busyhours="";
  79. /* Presentation theme */
  80. char *theme="standard";
  81. /* directory of session files */
  82. char session_dir[MAX_FNAME+1], s2_dir[MAX_FNAME+1];
  83. /* standardised header model for modules' output. Will be stored
  84.  * into the variable $wims_html_header. If the theme contains
  85.  * a file 'head.phtml', html_header will be defined by the address
  86.  * of this file  in subroutine define_html_header
  87.  */
  88. char *html_header="html/header.phtml";
  89. /* standardised about table for modules */
  90. char *module_about_file="html/module_about";
  91. /* title definition page */
  92. char *title_page="title.phtml";
  93. /* standardised header menu bar, to be included in module pages
  94.  * via command !headmenu */
  95. char *header_menu="headmenu.phtml";
  96. char *header_menu_user="headmenu_user.phtml";
  97. char *header_menu_supervisor="headmenu_supervisor.phtml";
  98. /* standardised referer to wims home, to be included in
  99.  * module pages via command !homeref */
  100. char *home_referer="homeref.phtml";
  101. char *home_referer_user="homeref_user.phtml";
  102. char *home_referer_supervisor="homeref_supervisor.phtml";
  103. /* background color in standard reference tables */
  104. char *ref_bgcolor="#676767";
  105. /* standard link color */
  106. char *link_color="#1468A0";
  107. /* visited link color */
  108. char *vlink_color="#1779BA";
  109. /* hover link color */
  110. char *hlink_color="#004077";
  111. /* link color in standard reference tables */
  112. char *ref_menucolor="#FFFFFF";
  113. /* background help button color */
  114. char *ref_button_help_bgcolor="#008f00";
  115. /* background help button color */
  116. char *ref_button_help_color="#FFFFFF";
  117.   /* button background color */
  118. char *ref_button_bgcolor="#666666";
  119.   /* button color */
  120. char *ref_button_color="#FFFFFF";
  121.   /* Default colors for activity types */
  122. char *actcolor="#000000,#CCCCFF,#99CCFF,#9999FF,#6666FF,#FFFFFF,#99CCDD,#AFB31E,#E6A493";
  123. /* module log disabled by default */
  124. int modlog=0;
  125. /* name of the variable definition file for every module.
  126.  * It is this file which defines the presence of the module.
  127. * Better do not make it configurable.
  128. */
  129. char var_def_file[256];
  130. /* name of variable init file. Processed only when cmd=new or renew. */
  131. char *var_init_file="var.init";
  132. /* name of variable calculation file. Parsed at each call. */
  133. char *main_var_proc_file="var.proc";
  134. /* name of the main (programmable) html file. */
  135. char *html_file="main.phtml";
  136. /* Introduction page name */
  137. char *intro_file="intro.phtml";
  138. /* Reference page */
  139. char *ref_file="wims_ref.phtml";
  140. /* script to process different inserts.
  141.  * The two consecutive points in the name prohibits ordinary
  142.  * user execution of the script.
  143.  */
  144. char *insdraw_processor="insdraw..processor";
  145. char *insplot_processor="insplot..processor";
  146. char *tex2gif="bin/tex..gif";
  147. char *priority=""; /* IPs of priority sites */
  148. char *texgif_fontdir="w/texgif";
  149. char *texgif_texheader="mathfonts/header";
  150. char *bgcolor="#F6F6F6"; /* page background color */
  151. char *bgimg="";  /* page background image file */
  152. char *pagecss="-theme-";  /* style sheet file */
  153. char *theme_icon="default";  /* icon */
  154. char *usecookie="no";  /* whether to send cookies to anon requests */
  155. char *mail_opt="";  /* !mailto options */
  156. char *mail_hidden="no"; /* option to hide or not user mail in server */
  157. char nodeip[256]="";  /* ip of cluster node if relevant */
  158. char temp_log[MAX_FNAME+1]; /* temp log file name */
  159.  /* 0: low; 1: high; 2: MathML */
  160. int mathalign_base=0;  /* Not use <sup> for middle alignment */
  161. char *disable_zoom="no";  /* yes/no:  default zooming allowed (if enabled via "useropts")  */
  162.  
  163. int spec_font=0; /* choose of some fonts*/
  164.  /* special font can be configured in log/wims.conf with variable special_font*/
  165. char *special_font="letter-spacing:0.1em;line-height:2.7em;word-spacing:0.8em;font-family:OpenDyslexic3,OpenDyslexic,sans-serif !important;";
  166. int backup_hour=-1; /* Hour for daily backup; -1 means no backup. */
  167. int site_accounting=1; /* whether accounting should be activated */
  168. int examlog_limit=7; /* number of logged exam sessions for each student */
  169. char *site_hostname="";
  170.  
  171. /* Automatic module update */
  172. char *mu_auto="none";
  173. char *mu_cat="all";
  174. char *mu_delay="3";
  175. char *mu_site="https://wims.univ-cotedazur.fr/download/modules";
  176. char *mu_zone="all";
  177. char *mu_download_site="unice,wimsedu";
  178. char *mu_publish_site="unice";
  179.  
  180. /* keywords destined to robots */
  181. char *site_keywords="interactive mathematics, interactive math, server side interactivity";
  182. char *site_description="interactive exercises, online calculators and plotters, mathematical recreation and games";
  183.  
  184. /* class and document authorization */
  185. int class_quota=150;
  186. int superclass_quota=150;
  187. int doc_quota=32;
  188. char *class_regpass="email,email,deny";
  189. char *doc_regpass="";
  190.  
  191. /* Where to find programs; if your httpd sets /bin:/usr/bin in PATH,
  192.  * this should be OK.
  193.  */
  194. char *sed_prog="sed";
  195. char *tr_prog="tr";
  196. char *awk_prog="awk";
  197.  
  198.   /* myname */
  199. char *cgi_name="wims.cgi";
  200. char *aliased_cgi="no";
  201. char *aliased_getfile="yes";
  202.  
  203.   /* Limits for classes and participants */
  204. int class_limit=200; /* limit of number of classes */
  205. int user_limit=5000; /* limit of total number of registered users */
  206. int class_user_limit=300; /* limit of users in one class */
  207. int forum_limit=100;  /* Limit of message boards */
  208. int max_techvar=5; /* default limit number of technical variable */
  209.  
  210. CONFIG_DATA main_config[]={
  211.   {"PATH",0, &commonpath},
  212.   {"QRencode_command",2, &QRencode_command},
  213.   {"actcolor",0, &actcolor},
  214.   {"aliased_cgi",0, &aliased_cgi},
  215.   {"aliased_getfile",0, &aliased_getfile},
  216.   {"backup_hour",1, &backup_hour},
  217.   {"busyhours",0, &busyhours},
  218.   {"cgi_name",0, &cgi_name},
  219.   {"class_limit",1, &class_limit},
  220.   {"class_quota",1, &class_quota},
  221.   {"class_regpass",0, &class_regpass},
  222.   {"class_user_limit",1, &class_user_limit},
  223.   {"css",0, &pagecss},
  224.   {"default_anim_format",0, &DEFAULT_ANIM_FORMAT},
  225.   {"default_ins_format",0, &DEFAULT_INS_FORMAT},
  226.   {"default_insplot_font",0, &DEFAULT_INSPLOT_FONT},
  227.   {"default_texposition",1, &mathalign_base},
  228.   {"devel_modules",0, &devel_modules},
  229.   {"doc_quota",1, &doc_quota},
  230.   {"doc_regpass",0, &doc_regpass},
  231.   {"examlog_limit",1, &examlog_limit},
  232.   {"forum_limit",1, &forum_limit},
  233.   {"gap_command",2, &gap_command},
  234.   {"general_log_limit",1, &GEN_LOG_LIMIT},
  235.   {"gnuplot_format",0, &gnuplot_format},
  236.   {"hlink_color",0, &hlink_color},
  237.   {"home_module",0, &home_module},
  238.   {"idle_time",1, &idle_time},
  239.   {"idle_time2",1, &idle_time2},
  240.   {"idle_time3",1, &idle_time3},
  241.   {"insdraw_processor",0, &insdraw_processor},
  242.   {"link_color",0, &link_color},
  243.   {"log_delete",1,&LOG_DELETE},
  244.   {"mail_hidden",0, &mail_hidden},
  245.   {"mail_opt",0, &mail_opt},
  246.   {"manager_https",1, &manager_https},
  247.   {"manager_site",0, &manager_site},
  248.   {"max_techvar",1,&max_techvar},
  249.   {"maxima_command",2, &maxima_command},
  250.   {"module_log",1, &modlog},
  251.   {"module_log_limit",1, &MODULE_LOG_LIMIT},
  252.   {"mu_auto",0, &mu_auto},
  253.   {"mu_cat",0, &mu_cat},
  254.   {"mu_delay",0, &mu_delay},
  255.   {"mu_download_site",0, &mu_download_site},
  256.   {"mu_publish_site",0, &mu_publish_site},
  257.   {"mu_site",0, &mu_site},
  258.   {"mu_zone",0, &mu_zone},
  259.   {"octave_command",2, &octave_command},
  260.   {"old_log_files",1, &OLD_LOG_FILES},
  261.   {"page_bgcolor",0, &bgcolor},
  262.   {"page_bgimg",0, &bgimg},
  263.   {"pari_command",2, &pari_command},
  264.   {"priority",0, &priority},
  265.   {"rafale_level",1, &rafalvl},
  266.   {"ref_bgcolor",0, &ref_bgcolor},
  267.   {"ref_button_bgcolor",0, &ref_button_bgcolor},
  268.   {"ref_button_color",0, &ref_button_color},
  269.   {"ref_button_help_bgcolor",0, &ref_button_help_bgcolor},
  270.   {"ref_button_help_color",0, &ref_button_help_color},
  271.   {"ref_menucolor",0, &ref_menucolor},
  272.   {"rlimit_cpu",1, &rlimit_cpu},
  273.   {"scilab_command",2, &scilab_command},
  274.   {"show_author",0, &show_author},
  275.   {"show_ip",0, &show_ip},
  276.   {"show_stat",0, &show_stat},
  277.   {"site_accounting",1, &site_accounting},
  278.   {"site_description",0, &site_description},
  279.   {"site_hostname",0, &site_hostname},
  280.   {"site_keywords",0, &site_keywords},
  281.   {"site_languages",0, &site_languages},
  282.   {"site_manager",0, &site_manager},
  283.   {"superclass_quota",1, &superclass_quota},
  284.   {"texbasesize",1, &texbasesize},
  285.   {"theme",0, &theme},
  286.   {"theme_icon",0, &theme_icon},
  287.   {"threshold1",1, &threshold1},
  288.   {"threshold2",1, &threshold2},
  289.   {"tmp_debug",0, &tmp_debug},
  290.   {"tmp_debug_use_var",0, &tmp_debug_use_var},
  291.   {"tmp_debug_var",0, &tmp_debug_var},
  292.   {"trusted_modules",0, &trusted_modules},
  293.   {"usecookie",0, &usecookie},
  294.   {"user_limit",1, &user_limit},
  295.   {"var_def_length_limit",1, &VAR_DEF_LENGTH_LIMIT},
  296.   {"vlink_color",0, &vlink_color},
  297.   {"workfile_limit",1, &WORKFILE_LIMIT}
  298. };
  299. int MAIN_CONFIG_NO=(sizeof(main_config)/sizeof(main_config[0]));
  300.  
  301. /* processes the list of languages supported on the site */
  302. void language_list(void)
  303. {
  304.   int i,k;
  305.   char *lbuf[MAX_LANGUAGES];
  306.   calc_tolower(site_languages); items2words(site_languages);
  307.   setvar("wims_site_languages",site_languages);
  308.   i=cutwords(site_languages,lbuf,MAX_LANGUAGES);
  309.   available_lang_no=i;
  310.   for(i=k=0;i<available_lang_no;i++) {
  311.     if(strlen(lbuf[i])==2) memmove(available_lang[k++],lbuf[i],3);
  312.   }
  313.   if(k>0) memmove(lang,available_lang[0],3);
  314. }
  315.  
  316. char hostname[256];
  317. int html_call=0;
  318.  
  319. /* determine the http reference name of the server */
  320. void determine_ref_name(void)
  321. {
  322.   char *s1, *s2, *p, *pl;
  323.   char buf[MAX_LINELEN+1];
  324.   int len;
  325.  
  326.   hostname[0]=0;
  327.   s1=getvar("httpd_HTTP_HOST");s2=getvar("httpd_SCRIPT_NAME");
  328.   gethostname(hostname,sizeof(hostname));
  329.   if(hostname[0]==0 && s1 && *s1!=0) mystrncpy(hostname,s1,sizeof(hostname));
  330.   if(s1==NULL || *s1==0) s1=hostname;
  331.   setvar("wims_myhostname",hostname);
  332.   ref_base[0]=0;
  333.   if(s2!=NULL) mystrncpy(buf,s2,sizeof(buf));
  334.   else buf[0]=0;
  335.   if(s1!=NULL && *buf=='/') {
  336.     p=strrchr(buf,'/'); if(p==NULL) p=buf; else *p++=0;
  337.     /* address of type /wims/fr_H2~algebra~oeffraction.fr.html */
  338.     if(strcmp(p,cgi_name)!=0 && strlen(p)>4 &&
  339.        p[2]=='_' && islower(p[0]) && islower(p[1])) {
  340.       pre_language[0]=p[0];pre_language[1]=p[1];pre_language[2]=0;
  341.       p[2]=0; setenv("HTTP_ACCEPT_LANGUAGE",p,1); pl=p; p+=3;
  342.       s2=strrchr(p,'.');
  343.       if(s2!=NULL) {
  344.         *s2=0;
  345.         if(strcasecmp(s2+1,"cgi")!=0) html_call=1;
  346.       }
  347.       s2=p; while((s2=strpbrk(s2,"@~"))!=NULL) *s2='/';
  348.       if(strncmp(p,"doc/",4)==0) {
  349.         char *pd, *pb;
  350.         pd=p+4;
  351.         if(*pd) {
  352.           pb=strchr(pd,'/');
  353.           if(pb) *pb++=0; else pb="main";
  354.           setvar("doc",pd); setvar("block",pb); setvar("job","read");
  355.         }
  356.         setvar(ro_name[ro_module],mkfname(NULL,"adm/doc.%s",pl));
  357.       }
  358.       else setvar(ro_name[ro_module],p);
  359.       module_defined=1;
  360.     }
  361.     p=strchr(buf,'_');
  362.     if(p!=NULL && p>buf+3 && myislower(*(p-1)) && myislower(*(p-2))
  363.          && *(p-3)=='/' && myisalpha(*(p+1))) {
  364.       char *pp;
  365.       for(pp=p+1; myisalnum(*pp); pp++){};
  366.       if(*pp=='/') *(p-3)=0;
  367.     }
  368.     p=getenv("HTTPS");
  369.     if(p!=NULL && strcmp(p,"on")==0)
  370.       snprintf(ref_name,sizeof(ref_name)-2,"https://%s%s/%s",s1,buf,cgi_name);
  371.     else
  372.       snprintf(ref_name,sizeof(ref_name)-2,"http://%s%s/%s",s1,buf,cgi_name);
  373.     mystrncpy(ref_base,ref_name,sizeof(ref_base)-2);
  374.     p=strrchr(ref_base,'/');
  375.     if(p!=NULL) *(p+1)=0;
  376.   }
  377.   else mystrncpy(ref_name,cgi_name,sizeof(ref_name)-1);
  378.  
  379.     // XSS PROTECTION (remove unwanted chars to avoid a possible XSS hack)
  380.     // Search for a first occurence of forbidden chars
  381.   len = strcspn(ref_name, "<>'\"\\");
  382.     // Give only the ref_name before forbidden chars
  383.   ref_name[len]=0;
  384.  
  385.   setvar("wims_ref_name",ref_name);
  386. }
  387.  
  388.       /* Read and interpret wims configuration file. */
  389. void main_configure(void)
  390. {
  391.   int i;
  392.   char *conf_buf,*e,*p,*p2,*p3;
  393.   char buf[MAX_LINELEN+1];
  394.  
  395.   conf_buf=readfile(config_file,NULL,WORKFILE_LIMIT);
  396.   if(conf_buf==NULL) goto fileend;
  397.   e=conf_buf-1; while(e) {
  398.     p=e+1; e=strchr(p,'\n'); if(e) *e=0;
  399.     p=find_word_start(p);
  400.     if(*p==0 || *p==comment_prefix_char) continue; /* empty or comment line */
  401.     p2=strchr(p,'=');
  402.     if(p2==NULL) continue; /* syntax error */
  403.     *p2=0; *find_word_end(p)=0; p2=find_word_start(p2+1);
  404.     p3=p2+strlen(p2); while(myislspace(p3[-1])) p3--;
  405.     while(p3[-1]=='\\') p3--;
  406.     *p3=0;
  407.     i=search_list(main_config,MAIN_CONFIG_NO,sizeof(main_config[0]),p);
  408.     if(i<0) continue; /* name non-defined */
  409.     if(main_config[i].is_integer==1) {
  410.       int *ip;
  411.       ip=main_config[i].address;
  412.       *ip=atoi(p2); if(*ip<0) *ip=0;
  413.     }
  414.     else {
  415.       char **cp;
  416.       cp=main_config[i].address;
  417.       *cp=p2;
  418.     }
  419.   }
  420.   fileend:
  421.   setenv("session_base_dir",session_dir,1);
  422.   determine_ref_name();
  423.   language_list();
  424.   for(i=0;i<MAIN_CONFIG_NO;i++) {
  425.     char **pp;
  426.     if(main_config[i].is_integer==2) {
  427.       pp=main_config[i].address;
  428.       setenv(main_config[i].name,*pp,1);
  429.     }
  430.   }
  431.         /* check priority */
  432.   if(priority[0] && checkhost(priority)>0) ispriority=1;
  433.   (void)getcwd(cwdbuf,sizeof(cwdbuf)); setvar("httpd_PWD",cwdbuf);
  434.   setenv("wims_server_base",cwdbuf,1);
  435.   p=strrchr(cwdbuf,'/');
  436.   if(p!=NULL && strcmp(p,"/public_html")==0) {
  437.     *p=0; snprintf(PATH,sizeof(PATH),"%s/other/bin:%s",cwdbuf,commonpath);
  438.     force_setvar("wims_home",cwdbuf);
  439.     *p='/';
  440.   }
  441.   else {
  442.     snprintf(PATH,sizeof(PATH),"%s/../other/bin:%s",cwdbuf,commonpath);
  443.     force_setvar("wims_home",cwdbuf);
  444.   }
  445.   setenv("PATH",PATH,1);
  446.   p=getvar("httpd_SERVER_SOFTWARE");
  447.   if(p && (strstr(p,"Apache"))!=NULL && strstr(aliased_getfile,"yes")!=NULL)
  448.     good_httpd=1;
  449.   accessfile(buf,"r","../tmp/log/myip");
  450.   *find_word_end(buf)=0;
  451.   if(buf[0]) {
  452.     snprintf(nodeip,sizeof(nodeip),"%s",buf);
  453.     snprintf(temp_log,sizeof(temp_log),"%s.%s",TEMP_LOG_FILE,nodeip);
  454.     force_setvar("wims_priv_nodeip",nodeip);
  455.   }
  456.   else {
  457.     nodeip[0]=0;
  458.     snprintf(temp_log,sizeof(temp_log),"%s",TEMP_LOG_FILE);
  459.   }
  460. }
  461.  
  462. struct {
  463.   int rname;
  464.   int *rval;
  465. } resource_table[]={
  466. #ifdef RLIMIT_CPU
  467.   {RLIMIT_CPU, &rlimit_cpu},
  468. #endif
  469. #ifdef RLIMIT_FSIZE
  470.   {RLIMIT_FSIZE, &rlimit_fsize},
  471. #endif
  472. #ifdef RLIMIT_AS
  473.   {RLIMIT_AS, &rlimit_as},
  474. #endif
  475. #ifdef RLIMIT_DATA
  476.   {RLIMIT_DATA, &rlimit_data},
  477. #endif
  478. #ifdef RLIMIT_STACK
  479.   {RLIMIT_STACK, &rlimit_stack},
  480. #endif
  481. #ifdef RLIMIT_CORE
  482.   {RLIMIT_CORE, &rlimit_core},
  483. #endif
  484. #ifdef RLIMIT_RSS
  485.   {RLIMIT_RSS, &rlimit_rss},
  486. #endif
  487. #ifdef RLIMIT_NPROC
  488.   {RLIMIT_NPROC, &rlimit_nproc},
  489. #endif
  490. #ifdef RLIMIT_NOFILE
  491.   {RLIMIT_NOFILE, &rlimit_nofile},
  492. #endif
  493. #ifdef RLIMIT_MEMLOCK
  494.   {RLIMIT_MEMLOCK, &rlimit_memlock}
  495. #endif
  496. };
  497. #define RESOURCE_NO (sizeof(resource_table)/sizeof(resource_table[0]))
  498.  
  499. /* set system resource limits */
  500. void set_rlimits(void)
  501. {
  502.   int i;
  503.   struct rlimit rlim;
  504.  
  505.   for(i=0;i<RESOURCE_NO;i++) {
  506.     rlim.rlim_cur=rlim.rlim_max=*(resource_table[i].rval);
  507.     setrlimit(resource_table[i].rname,&rlim);
  508.     if(resource_table[i].rname==RLIMIT_CPU) {
  509.       setvar("wims_cpu_limit",int2str(rlim.rlim_max));
  510.       initalarm();
  511.     }
  512.   }
  513. }
  514.  
  515. struct {
  516.   char *name;
  517.   int is_integer;
  518.   void *default_value;
  519. } module_default[]={
  520.   {"anim_format",0, &DEFAULT_ANIM_FORMAT},
  521.   {"gnuplot_format",0, &gnuplot_format},
  522.   {"ins_anim_limit",1, &ANIM_LIMIT},
  523.   {"ins_density",0, &DEFAULT_INS_DENSITY},
  524.   {"ins_format",0, &DEFAULT_INS_FORMAT},
  525.   {"insplot_font",0, &DEFAULT_INSPLOT_FONT},
  526.   {"wims_busyhours",0, &busyhours},
  527.   {"wims_class_limit",1, &class_limit},
  528.   {"wims_class_quota",1, &class_quota},
  529.   {"wims_class_regpass",0, &class_regpass},
  530.   {"wims_class_user_limit",1, &class_user_limit},
  531.   {"wims_compare_precision",1, &DEFAULT_COMPARE_PRECISION},
  532.   {"wims_devel_modules",0, &devel_modules},
  533.   {"wims_doc_quota",1, &doc_quota},
  534.   {"wims_doc_regpass",0, &doc_regpass},
  535.   {"wims_examlog_limit",1, &examlog_limit},
  536.   {"wims_forum_limit",1, &forum_limit},
  537.   {"wims_bgcolor",0, &bgcolor},
  538.   {"wims_bgimg",0, &bgimg},
  539.   {"wims_css",0, &pagecss},
  540.   {"wims_link_color",0, &link_color},
  541.   {"wims_print_precision", 1, &DEFAULT_PRINT_PRECISION},
  542.   {"wims_ref_bgcolor",0, &ref_bgcolor},
  543.   {"wims_ref_button_bgcolor",0, &ref_button_bgcolor},
  544.   {"wims_ref_button_color",0, &ref_button_color},
  545.   {"wims_ref_button_help_bgcolor",0, &ref_button_help_bgcolor},
  546.   {"wims_ref_button_help_color",0, &ref_button_help_color},
  547.   {"wims_ref_menucolor",0, &ref_menucolor},
  548.   {"wims_show_author",0, &show_author},
  549.   {"wims_show_ip",0, &show_ip},
  550.   {"wims_show_stat",0, &show_stat},
  551.   {"wims_site_description",0, &site_description},
  552.   {"wims_site_keywords",0, &site_keywords},
  553.   {"wims_site_manager",0, &site_manager},
  554.   {"wims_texalign",1, &mathalign_base},
  555.   {"wims_texbasesize",1, &texbasesize},
  556.   {"wims_theme",0, &theme},
  557.   {"wims_theme_icon",0, &theme_icon},
  558.   {"wims_tmp_debug",0, &tmp_debug},
  559.   {"wims_usecookie",0, &usecookie},
  560.   {"wims_user_limit",1, &user_limit},
  561.   {"wims_vlink_color",0, &vlink_color},
  562.   {"wims_hlink_color",0, &hlink_color},
  563.   {"wims_superclass_quota", 1, &superclass_quota},
  564.   {"wims_mail_hidden", 0, &mail_hidden}
  565. };
  566. #define MODULE_DEFAULT_NO (sizeof(module_default)/sizeof(module_default[0]))
  567.  
  568. /* Set defaults for module, and set corresponding variables. */
  569. void module_configure(void)
  570. {
  571.   int i;
  572.   confset=1;
  573.   for(i=0;i<MODULE_DEFAULT_NO;i++) {
  574.     if(module_default[i].is_integer) {
  575.       int j, *jp;
  576.       jp=module_default[i].default_value;
  577.       j=*jp; if(j<0) j=0;
  578.       setvar(module_default[i].name,int2str(j));
  579.     }
  580.     else {
  581.       char **cp;
  582.       cp=module_default[i].default_value;
  583.       setvar(module_default[i].name,*cp);
  584.     }
  585.   }
  586.   setenv("texgif_fontdir",texgif_fontdir,1);
  587.   setenv("texgif_texheader",texgif_texheader,1);
  588.   setvar("wims_texsize","0");
  589.   setvar("disable_zoom","0");
  590.   setvar("disable_mathml","0");
  591.   setvar("force_mathml","0");
  592.   /* if 'force_mathml=yes' , a check should be done on the value of 'disable_mathml'.
  593.      so it's not fool-proof.
  594.   */
  595.   confset=0;
  596. }
  597.  
  598. char *modindex[]={
  599.   "address",
  600.   "author",
  601.   "category",
  602.   "copyright",
  603.   "data",
  604.   "deprecated",
  605.   "description",
  606.   "description_ca",
  607.   "description_cn",
  608.   "description_de",
  609.   "description_en",
  610.   "description_es",
  611.   "description_fr",
  612.   "description_it",
  613.   "description_nl",
  614.   "description_si",
  615.   "description_tw",
  616.   "domain",
  617.   "help",
  618.   "keywords",
  619.   "keywords_ca",
  620.   "keywords_cn",
  621.   "keywords_de",
  622.   "keywords_en",
  623.   "keywords_es",
  624.   "keywords_fr",
  625.   "keywords_it",
  626.   "keywords_nl",
  627.   "keywords_si",
  628.   "keywords_tw",
  629.   "language",
  630.   "level",
  631.   "maintainer",
  632.   "maintainer_address",
  633.   "mode",
  634.   "require",
  635.   "scoring",
  636.   "title",
  637.   "title_ca",
  638.   "title_cn",
  639.   "title_de",
  640.   "title_en",
  641.   "title_es",
  642.   "title_fr",
  643.   "title_it",
  644.   "title_nl",
  645.   "title_si",
  646.   "title_tw",
  647.   "translation_language",
  648.   "translator",
  649.   "translator_address",
  650.   "translator_address_ca",
  651.   "translator_address_cn",
  652.   "translator_address_de",
  653.   "translator_address_en",
  654.   "translator_address_es",
  655.   "translator_address_fr",
  656.   "translator_address_it",
  657.   "translator_address_nl",
  658.   "translator_address_si",
  659.   "translator_address_tw",
  660.   "translator_ca",
  661.   "translator_cn",
  662.   "translator_de",
  663.   "translator_en",
  664.   "translator_es",
  665.   "translator_fr",
  666.   "translator_it",
  667.   "translator_nl",
  668.   "translator_si",
  669.   "translator_tw",
  670.   "vardef",
  671.   "version",
  672.   "wims_version",
  673. };
  674. int MODINDEX_NO=(sizeof(modindex)/sizeof(modindex[0]));
  675.  
  676. char *module_special_file[]={
  677.   "intro","help"
  678. };
  679. #define MODSPEC_NO (sizeof(module_special_file)/sizeof(module_special_file[0]))
  680.  
  681. /* read and treat module's INDEX file */
  682. void module_index(void)
  683. {
  684.   char buf[MAX_NAMELEN+1], ind_buf[MAX_LINELEN+1];
  685.   char *e, *p, *p2, *ft;
  686.   double v1, v2;
  687.   int i,l;
  688.   long indf_len;
  689.  
  690.   memmove(var_def_file,default_var_def,strlen(default_var_def)+1);
  691.   ft=readfile(mkfname(NULL,"%s/INDEX",module_prefix),
  692.           ind_buf,sizeof(ind_buf));
  693.   if(ft==NULL) ft=readfile(mkfname(NULL,"%s/index",module_prefix),
  694.                      ind_buf,sizeof(ind_buf));
  695.   if(ft==NULL) return;
  696.   e=ind_buf-1; indf_len=strlen(ind_buf);
  697.   for(l=0; e<ind_buf+indf_len && e!=NULL ;l++) {
  698.     p=e+1; e=strchr(p,'\n'); if(e!=NULL) *e=0;
  699.     strip_trailing_spaces(p); p=find_word_start(p);
  700.     if(*p==0 || *p==comment_prefix_char) continue; /* empty or comment line */
  701.     p2=strchr(p,'=');
  702.     if(p2==NULL) continue; /* syntax error */
  703.     *p2=0; *find_word_end(p)=0; p2=find_word_start(p2+1);
  704.     i=search_list(modindex,MODINDEX_NO,sizeof(modindex[0]),p);
  705.     if(i<0) continue; /* name not in list */
  706.     snprintf(buf,sizeof(buf),"module_%s",p);
  707.     setvar(buf,p2);
  708.   }
  709.   if(mode!=mode_default) {
  710.     char *s;
  711.     s=getvar("module_mode");
  712.     if(s==NULL) {
  713.       nomode: mode=mode_default; force_setvar("wims_mode","");
  714.     }
  715.     else switch(mode) {
  716.       case mode_popup: {
  717.         if(strstr(s,"popup")==NULL) goto nomode;
  718.         else break;
  719.       }
  720.       case mode_raw: {
  721.         if(strstr(s,"raw")==NULL) goto nomode;
  722.         else break;
  723.       }
  724.       default: break;
  725.     }
  726.   }
  727. /* test for existence of some special files in module's directory */
  728.   for(i=0;i<MODSPEC_NO;i++) {
  729.     if(ftest(mkfname(NULL,"%s/%s.phtml",module_prefix,module_special_file[i]))
  730.       ==is_file) {
  731.       snprintf(buf,sizeof(buf),"module_has_%s",module_special_file[i]);
  732.       setvar(buf,"yes");
  733.     }
  734.   }
  735.   p=getvar("module_language"); if(p==NULL || *p==0) setvar("module_language","en");
  736.   setvar("module_has_about","yes"); /* now we have default about.phtml */
  737. /* Set var_def */
  738.   p=getvar("module_vardef");
  739.   if(p!=NULL && *p!=0) mystrncpy(var_def_file,p,sizeof(var_def_file));
  740.   p=getvar("module_wims_version"); if(p!=NULL && *p!=0) {
  741.     v1=atof(p); v2=atof(wims_version);
  742.     if(isfinite(v1) && isfinite(v2) &&
  743.         (v1>v2 || (v1==v2 && strcmp(find_word_start(p),wims_version)>0))) {
  744.       setvar("module_wims_version",p);
  745.       setvar("wims_version",wims_version);
  746.       module_error("antidated_version");
  747.     }
  748.   }
  749.   if(isdevelmodule) {
  750.     p=getvar("module_scoring");
  751.     if(p==NULL || strcasecmp(p,"yes")!=0) isdevelmodule=0;
  752.   }
  753. }
  754.  
  755. /* Set up a unique job identity as a 4-bytes integer */
  756. unsigned long create_job_ident(void)
  757. {
  758. /* unsigned long it; // 64-bit compatibility: take away _long_ */
  759.   unsigned long it;
  760.   int i;
  761. /* Is this enough to guarantee uniqueness? */
  762.  
  763.   it=(nowtime<<16)+(getpid()&0xffff);
  764. /* The encryption is very simple. */
  765.   it=it^0x5a3c9671;
  766.   for(i=0;i<MAX_SESRANDOM;i++) sesrandomtab[i]=random();
  767.     /* ensure that the result will be a 4-bytes integer gives random problem on 32 bits
  768.     return it;*/
  769.   return it & 0xffffffff;
  770. }
  771.  
  772. /* Setup a job identifier */
  773. void set_job_ident(void)
  774. {
  775.   unsigned long l,r;
  776.  
  777.   l=create_job_ident();
  778.   /* the last 4 bits always make 0xA. A bug of glibc random()? */
  779.   r=random()>>4;
  780.   snprintf(job_identifier,sizeof(job_identifier),"%lX%08lX",r,l);
  781.   var_noexport=1;
  782.   setvar("job_identifier",job_identifier);
  783.   var_noexport=0;
  784. }
  785.  
  786. /* define the variable $wims_html_header */
  787. void define_html_header(void)
  788. {
  789.   char *sp, *cp, *ladirection, *mp, *s2, *wversion;
  790.   char buf[MAX_LINELEN+1];
  791.   int buf_length = 0;
  792.   int noc;
  793.   noc=0;
  794.   cp=getvar("wims_expire"); if(cp!=NULL) goto css;
  795.   if(!robot_access && cmd_type==cmd_intro && isclassmodule) {
  796.     sp=getvar("special_parm"); if(sp==NULL) sp="";
  797.     if(strcmp(sp,".nocache.")==0) {
  798.       force_setvar("special_parm",""); noc=1;
  799.     }
  800.     if(!noc) {
  801.       mp=getvar(ro_name[ro_module]);
  802.       if(mp!=NULL && strncmp(mp,"devel/",strlen("devel/"))==0) noc=1;
  803.     }
  804.   }
  805.   if(noc==1){
  806.     _output_("Cache-Control: no-cache, no-store, must-revalidate\r\n");
  807.   }
  808.   css:
  809.   setvar("wims_CSS","");
  810.   /* wims_css peut avoir pour valeur "---" ou "-theme-" au niveau du site
  811.     + la valeur "class" si une classe décide d'utiliser son propre css à la place du theme
  812.   */
  813.   cp=getvar("wims_css");
  814.   ladirection=getvar("wims_main_dirn");
  815.   if (strcmp(ladirection,"ltr")==0) ladirection="";
  816.  
  817.   if(!robot_access && cp!=NULL && *cp!=0 && strstr(cp,"---")==NULL) {
  818.     char *nbuf;
  819.     cp=find_word_start(cp);
  820.  
  821.     if(strchr(cp,'/')==NULL) {
  822.       char *pc, *th, *ti; int class_style=0;
  823.       pc=getvar("wims_class");
  824.       wversion=getvar("wims_version");
  825.       if(wversion==NULL || *wversion==0) wversion="0.0";
  826.  
  827.       /* When a class choose its own css instead of theme css */
  828.       if(pc!=NULL && *pc!=0 && strcmp(cp,"class")==0) {
  829.         nbuf=mkfname(NULL,"%s/%s/css",class_base,pc);
  830.         th=getvar("class_theme");ti=getvar("class_theme_icon") ;
  831.         if(th==NULL || *th==0) th=getvar("wims_theme");
  832.         if(ti==NULL || *ti==0) ti=getvar("wims_theme_icon");
  833.  
  834.         // Check content of "nbuf" file. (if file is too heavy (>45Ko), it will raise a user_error)
  835.         if( readfile(nbuf,tmplbuf,sizeof(tmplbuf)) ){
  836.           // file exist
  837.           //snprintf(buf,sizeof(buf),"<style>%s</style>",tmplbuf);
  838.           // The content will be added by scripts/adm/css.phtml
  839.           class_style = 1;
  840.         }
  841.       }
  842.  
  843.       if (!class_style) {
  844.         th=getvar("wims_theme");
  845.         /* when wims_css is everything but '---' */
  846.         if(strcmp(cp,"---")!=0 && strchr(th,'.')==NULL) {
  847.           if(th==NULL || *th==0) th="standard";
  848.           nbuf=mkfname(NULL,"html/themes/%s/css.css",th);
  849.  
  850.           // Check if theme css file exists (use access from unistd.h)
  851.           if( access( nbuf, F_OK ) != -1 ) {
  852.             buf_length = snprintf(buf,sizeof(buf),"<link href=\"%s?ver=%s\" rel=\"stylesheet\">", nbuf, wversion);
  853.           }
  854.         }
  855.       }
  856.       /* icon theme */
  857.       ti=getvar("wims_theme_icon");
  858.       if(ti==NULL || *ti==0) ti="default";
  859.       snprintf(buf+buf_length,sizeof(buf)-buf_length,"<link href=\"gifs/themes/%s/icon-min.css?ver=%s\" rel=\"stylesheet\">", ti, wversion);
  860.  
  861.       setvar("wims_CSS",buf);
  862.  
  863.       /* case of theme */
  864.       if (th) {
  865.         s2=getvar("module_title");
  866.         if(s2!=NULL && *s2!=0) {
  867.           char nbuf[MAX_LINELEN+1];
  868.           mystrncpy(nbuf,s2,sizeof(nbuf)); calc_detag(nbuf); setvar("module_title2",nbuf);
  869.         };
  870.         nbuf=mkfname(NULL,"html/themes/%s/htmlheader.phtml",th) ;
  871.         if (readfile(nbuf,tmplbuf,sizeof(tmplbuf))) html_header=nbuf ;
  872.       }
  873.     }
  874.   }
  875.   if(readfile(html_header,buf,sizeof(buf)))
  876.   setvar("wims_html_header",buf);
  877. }
  878.  
  879. /* Set Session Dir */
  880. void setsesdir(char *d)
  881. {
  882.   char buf[MAX_FNAME+1];
  883.   if(strstr(d,parent_dir_string)!=NULL) {
  884.     force_setvar("wims_session",robot_session);
  885.     mystrncpy(buf,robot_session,sizeof(buf));
  886.     mkfname(session_dir,"../tmp");
  887.     mkfname(s2_dir,"../tmp");
  888.   }
  889.   else {
  890.     force_setvar("wims_session",d);
  891.     snprintf(buf,sizeof(buf),"%s/%s",SESSION_BASE,d);
  892.     mkfname(session_dir,"../%s",SESSION_BASE);
  893. /* mkfname(s2_dir,"../%s",S2_BASE); */
  894.   }
  895.   force_setvar("wims_sesdir",buf);
  896. }
  897.