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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. /* Web exerciser */
  19.  
  20. #include "wims.h"
  21. enum Name_Modes NAME_MODES;
  22. enum Ro_Names RO_NAMES;
  23. enum _commands COMMANDS;
  24. WORKING_FILE m_file, svar_file, mcache[MAX_MCACHE];
  25. struct VAR_DEF var_def[MAX_VAR_NUM];
  26. char examlogf[MAX_FNAME+1];
  27. char mpboundary[1024];
  28. char *stdinbuf;
  29. struct user_variable user_variable[MAX_VAR_NUM];
  30. char available_lang[MAX_LANGUAGES][4];
  31.  
  32. struct {
  33.   char *name;
  34.   char *font;
  35. } charname[]={
  36.   {"en","windows-1252"},
  37.   {"fr","windows-1252"},
  38.   {"es","windows-1252"},
  39.   {"cn","gb2312"},
  40.   {"de","windows-1252"},
  41.   {"it","windows-1252"},
  42.   {"nl","windows-1252"},
  43.   {"si","iso-8859-2"},
  44.   {"ar","iso-8859-6"},
  45.   {"tw","big5"},
  46.   {"pt","windows-1252"},
  47.   {"ca","windows-1252"},
  48.   {"pt","windows-1252"},
  49.   {"ru","iso-8859-5"},
  50.   {"ty","iso-8859-13"}
  51. };
  52.  
  53. #define charname_no (sizeof(charname)/sizeof(charname[0]))
  54.  
  55. /* left to right or right to left writing */
  56. struct {
  57.   char *name;
  58.   char *dirn;
  59. } dirnname[]={
  60.   {"en","ltr"},
  61.   {"fr","ltr"},
  62.   {"es","ltr"},
  63.   {"cn","ltr"},
  64.   {"de","ltr"},
  65.   {"it","ltr"},
  66.   {"nl","ltr"},
  67.   {"si","ltr"},
  68.   {"ar","rtl"},
  69.   {"tw","ltr"},
  70.   {"pt","ltr"},
  71.   {"ca","ltr"},
  72.   {"pt","ltr"},
  73.   {"ru","ltr"},
  74.   {"ty","ltr"}
  75.  
  76. };
  77.  
  78. #define dirnname_no (sizeof(dirnname)/sizeof(dirnname[0]))
  79.  
  80.  
  81. #define evalue strevalue
  82. char *robot_session="../tmp/robot";
  83. int robot_access=0,human_access=0;
  84. int user_error_nolog=0;
  85. char *good_agent[]={
  86.   "Mozilla","Netscape","Opera","WIMS",
  87.   "MSIE","Konqueror","Java"
  88. };
  89. #define good_agent_no (sizeof(good_agent)/sizeof(good_agent[0]))
  90.  
  91. char *bad_agent[]={ /* These are really bad agents: prohibited. */
  92.   "HTTrack","MemoWeb","Teleport","Offline","Wget","eCatch",
  93.   "Powermarks","EmailSiphon", "WebCopier"
  94. };
  95. #define bad_agent_no (sizeof(bad_agent)/sizeof(bad_agent[0]))
  96.  
  97. /* used for debugging */
  98. int debug=0;
  99.  
  100. char class_dir[MAX_FNAME+1]; /* directory name of this class */
  101.  
  102. struct user_variable user_variable[MAX_VAR_NUM];
  103. int user_var_no;
  104.  
  105. struct VAR_DEF var_def[MAX_VAR_NUM];
  106. int defined_var_total;
  107.  
  108. /* Destinated to module error messages */
  109. WORKING_FILE m_file,svar_file,mcache[MAX_MCACHE];
  110. int mcachecnt;
  111.  
  112. /* Limit for any data working files. */
  113. int WORKFILE_LIMIT=2048*1024;
  114.  
  115. /* whether the user has defined language */
  116. int user_lang=0;
  117.  
  118. /* for instex grouping */
  119. int instex_cnt=0, getwimstexsize=1;
  120. char instex_src[MAX_LINELEN+1], instex_fname[MAX_LINELEN+1];
  121. char *instex_processor="tex..gif";
  122.  
  123. /* Cookie management */
  124. char cookiegot[256], cookieset[256], cookieheader[64]="WIMSUSER=";
  125.  
  126. /* multipart boundary */
  127. char mpboundary[1024];
  128. int  deplen=0; /* length of deposit */
  129.  
  130. int confset=0; /* set to 1 if setvar for config */
  131.  
  132. /* Operating mode: default, popup, raw, etc. */
  133.  
  134. int mode=mode_default;
  135.  
  136. /* Switch; notice subroutines wherether we are outputing. */
  137. int outputing;
  138.  
  139. char *home_module="home"; /* name of home module */
  140. extern char **environ;      /* table of environment variables */
  141. int module_defined=0;
  142.  
  143.         /* directory prefix buffers */
  144. char session_prefix[MAX_FNAME+1], s2_prefix[MAX_FNAME+1], module_prefix[MAX_FNAME+1];
  145.  
  146. char *stdinbuf;
  147. int sesrandomtab[MAX_SESRANDOM]; /* session random values */
  148. char multiexec_random[64];
  149. int executed_gotos; /* number of goto's executed. to check with GOTO_LIMIT. */
  150. int insert_no; /* number of instex, insplot, insPLOT. */
  151. int output_length; /* length of the output. */
  152. int isexam=0; /* non-zero if request is exam */
  153. int simuxam=0; /* exam is simulation */
  154. int is_multiexec=0; /* for execredirected */
  155. int multiexec_index;
  156. int direct_datafile=0;
  157. int exec_is_module=0;
  158.   /* root directory of modules */
  159. char *module_dir="modules";
  160. int new_session=0; /* =1 if new session created */
  161. int good_httpd=0; /* Whether the http server is intelligent */
  162. /* int internal_sql=0; */ /* for internal sql use */
  163. int direct_exec=0; /* calc routine is exected by exec if 1 */
  164. int print_precision=8; /* precision when printing real numbers */
  165. int session_serial; /* request serial for session control */
  166. int form_access=0; /* identifies form access, for robot identification */
  167. int lastout_file=-1; /* file to hold last output */
  168. char *instex_style=""; /* "": text "$": math "$$": displaymath */
  169. int instex_usedynamic=0; /* always dynamic if 1 */
  170. int wrapexec=0; /* if set to 1, change uid (nobody) to euid (wims).
  171.                  * if set to -1, change euid to uid when exec(). */
  172. int parm_restore=0; /* Restoring saved parameters? */
  173. int exec_wait=1; /* whether to wait for fork return */
  174. int execnt=0; /* count executions */
  175. int readnest; /* nested read count */
  176. int mfilecnt=0; /* count working files */
  177. int forceresume=0; /* force user to resume old request */
  178. int manageable=0; /* whether the connection may be site manager
  179.                    * 0: no; 1: maybe; 2: sure */
  180. int ismhelp=0;  /* 1 if session is in mhelp. */
  181. int getvar_len; /* length of the last-got variable. */
  182. int noout=0; /* if set to 1 then output is skipped */
  183. char tmp_dir[MAX_FNAME+1]; /* temporary directory */
  184. char *bin_dir="bin"; /* directory containing executable scripts and programs. */
  185. char cwdbuf[MAX_FNAME+1]; /* store current working directory */
  186. char var_hacking=0; /* Trying to hack a variable? */
  187. char *tmp_debug="no";
  188. char *tmp_debug_var="";
  189. char ins_alt[MAX_LINELEN+1]; /* dynamic insertion alternative text */
  190. char *devel_modules="close"; /* whether to open devel modules */
  191. int isclassmodule=0; /* 1 if the module is class module */
  192. int isdevelmodule=0; /* development module? */
  193. int setcookie=0; /* 1 if need to set cookie */
  194. int killpid=0; /* pid of process to kill by alarm */
  195. char *mathalign_sup1, *mathalign_sup2; /* see mathalign_base */
  196. int substnest=0; /* nesting level of substit() */
  197. int exodepOK=1;
  198. long int startmtime; /* start time in milliseconds */
  199. long int startmtime2; /* start time in microseconds */
  200. int backslash_insmath=0; /* \(...) substitution? */
  201. char examlogf[MAX_FNAME+1]; /* examlog file name */
  202. char examlogd[MAX_FNAME+1]; /* examlog file name */
  203. char exam_sheetexo[32]; /* sheet data of an exam */
  204. char loadavg[64];
  205. /* user file variable access control. */
  206. char *var_readable, *var_writable, *var_nr, *var_nw, *var_pfx;
  207. int hostcquota;
  208. int var_noexport; /* do not export variable */
  209.  
  210. char tmplbuf[MAX_LINELEN+1]; /* for temporary uses not thru subroutines. */
  211.  
  212. struct tm *now, Now; /* time of request */
  213. time_t nowtime, limtime, limtimex;
  214. char nowstr[32];
  215.  
  216. /* Resource limits. Capital names are reserved by system. */
  217. int rlimit_cpu=20;  /* cpu time in seconds */
  218. int rlimit_fsize=8388608;/* file size */
  219. int rlimit_as=614457600;/* virtual memory size */
  220. int rlimit_data=2004857600;/* data segment size; maxima requires a lot (must be lower than rlimit_as)*/
  221. int rlimit_stack=2097152;/* stack size */
  222. int rlimit_core=0; /* core dump size */
  223. int rlimit_rss=16777216; /* resident size */
  224. int rlimit_nproc=1024; /* number of processes */
  225. int rlimit_nofile=512; /* number of open files */
  226. int rlimit_memlock=2097152;/* locked-in-memory address space */
  227.  
  228. char *var_str; /* malloc'ed buffer to hold translated query_string */
  229.  
  230. /* buffer to hold module's variable definition file, malloc'ed. */
  231. char *var_def_buf;
  232.  
  233. /* job_identifier is even a reserved variable name */
  234. char job_identifier[32];
  235.  
  236. /* site manager definition IPv4 IPv6*/
  237. char *manager_site="127.0.0.1 ::1";
  238. int   manager_https=0;
  239.  
  240. /* sheet and exercise information */
  241. int wims_sheet=0,wims_exo=0;
  242.  
  243. /* Form method: get or post */
  244. char *default_form_method="post";
  245.  
  246. /* Je suis maintenant oblige de passer a l'anglais
  247.  * pour la langue de defaut.
  248.  */
  249. char lang[16]="en";
  250. char available_lang[MAX_LANGUAGES][4]={"en","fr"};
  251. int available_lang_no=2;
  252. char pre_language[4]="";
  253. FILE *trace_file;
  254. int trace_indent=0;
  255. char *protocol="http"; /* http or https */
  256.  
  257. /* check for coordinate input. This will mean that
  258.  * the request is manual, but not robot.
  259.  */
  260. int coord_input=0;
  261.  
  262. /* These are readonly environment variable names
  263.  * special parm used for special cmds (getins, etc).
  264.  */
  265. char *ro_name[]={
  266.   "cmd",
  267.   "empty",
  268.   "lang",
  269.   "module",
  270.   "session",
  271.   "special_parm",
  272.   "special_parm2",
  273.   "special_parm3",
  274.   "special_parm4",
  275.   "useropts" ,
  276.   "wims_session",
  277.   "wims_subsession",
  278.   "wims_window",
  279.   "worksheet"
  280. };
  281.  
  282. int RO_NAME_NO=(sizeof(ro_name)/sizeof(ro_name[0]));
  283.  
  284. int cmd_type;
  285. char *commands[]={
  286.     "intro" , "new" , "renew" , "reply" , "config" , "hint" , "help" ,
  287.       "resume", "next", "getins", "getframe", "getfile", "close", "ref"
  288. };
  289.  
  290. int CMD_NO=(sizeof(commands)/sizeof(commands[0]));
  291.  
  292. /* stat=0: saved variables
  293.  * all names starting with wims_priv_ are also internal.
  294.  */
  295. struct internal_name internal_name[]={
  296.   {"accessright", 1}, /* right to access commercial resources */
  297.   {"caller", 1}, /* caller session */
  298.   {"check", 1}, /* for exam check use */
  299.   {"class", 1},
  300.   {"class_examlog", 1},
  301.   {"class_exolog", 1},
  302.   {"class_limit", 1},
  303.   {"class_quota", 1},
  304.   {"class_regpass", 1},
  305.   {"class_user_limit", 1},
  306.   {"classdir", 1},
  307.   {"classname", 1},
  308.   {"devel_modules", 1},
  309.   {"developer", 1},
  310.   {"doc_quota", 1},
  311.   {"doc_regpass", 1},
  312.   {"email", 1},
  313.   {"exo", 0}, /* exercise number */
  314.   {"exoption", 1}, /* exercise option */
  315.   {"exotrymax", 0},
  316.   {"firstname", 1},
  317.   {"forum_limit", 1},
  318.   {"home", 1},
  319.   {"institutionname", 1},
  320.   {"isexam", 0}, /* whether the sheet is an exam sheet */
  321.   {"ismanager", 0},
  322.   {"lastname", 1},
  323.   {"mode", 0}, /* operating mode */
  324.   {"module_start_time", 0},
  325.   {"now", 1}, /* date and time, yyyymmdd.hh:mm:ss */
  326.   {"nowseconds", 1}, /* date and time, seconds since EPOCH */
  327.   {"nr", 1}, /* non-readable variables in user file, words */
  328.   {"nw", 1}, /* non-writable variables in user file, words */
  329.   {"otherclass", 1}, /* Remember other logins */
  330.   {"participate", 1}, /* superclass definition */
  331.   {"prefix", 1}, /* user file prefix */
  332.   {"protocol", 0}, /* http protocol */
  333.   {"rafale", 0}, /* rapidfire request information */
  334.   {"readable", 1}, /* readable variables in user file, words */
  335.   {"realuser", 1}, /* real user for supervisor in gateway */
  336.   {"req_time", 0}, /* time of the request */
  337.   {"sclassdir", 1},
  338.   {"scorereg", 0}, /* score registration flag */
  339.   {"seed", 0},
  340.   {"seed_repeat",0},
  341.   {"seed_score", 0},
  342.   {"seedcnt",0},
  343.   {"seedlastcnt",0},
  344.   {"sequence", 0}, /* sequence number */
  345.   {"sescookie", 1}, /* session cookie */
  346.   {"sesdir", 1},
  347.   {"session_serial", 0}, /* request serial in the session */
  348.   {"session_start_time", 0},
  349.   {"sheet", 0}, /* sheet number */
  350.   {"sup_secure", 1}, /* secure level of supervisor */
  351.   {"superclass", 1}, /* superclass code */
  352.   {"superclass_quota", 1},
  353.   {"supertype", 1}, /* superclass type */
  354.   {"supervise", 1}, /* superclass definition */
  355.   {"supervisor", 1}, /* real name of the supervisor */
  356.   {"supervisormail",1}, /* email of supervisor */
  357.   {"trustfile", 1}, /* trusted files in special adm modules */
  358.   {"useropts", 1}, /* user options */
  359.   {"writable", 1}, /* writable variables in user file, words */
  360. };
  361. int INTERNAL_NAME_NO=(sizeof(internal_name)/sizeof(internal_name[0]));
  362.  
  363. char *httpd_vars[]={
  364.   "HTTP_ACCEPT",
  365.   "HTTP_ACCEPT_CHARSET",
  366.   "HTTP_ACCEPT_LANGUAGE",
  367.   "HTTP_COOKIE",
  368.   "HTTP_HOST",
  369.   "HTTP_USER_AGENT",
  370.   "HTTP_X_REQUESTED_WITH",
  371.   "HTTPS",
  372.   "QUERY_STRING",
  373.   "REMOTE_HOST",
  374.   "REMOTE_ADDR",
  375.   "REMOTE_PORT",
  376.   "REQUEST_METHOD",
  377.   "SCRIPT_NAME",
  378.   "SERVER_NAME",
  379.   "SERVER_SOFTWARE",
  380.   "SERVER_PROTOCOL"
  381. };
  382. #define HTTPD_VAR_NO (sizeof(httpd_vars)/sizeof(httpd_vars[0]))
  383.  
  384. /* security: these variables will not be visible to child processes */
  385. char *unsetvars[]={
  386.   "DOCUMENT_ROOT","SERVER_SIGNATURE","SERVER_SOFTWARE",
  387.       "UNIQUE_ID","HTTP_KEEP_ALIVE","SSL_SESSION_ID"
  388. };
  389. #define unsetvarcnt (sizeof(unsetvars)/sizeof(unsetvars[0]))
  390.  
  391. int httpd_type=httpd_apache;
  392.  
  393. char *remote_addr=""; /* storing for performance */
  394. char *remote_host="";
  395.  
  396. char ref_name[2048], ref_base[2048];
  397.  
  398. void put_special_page(char *pname);
  399. void useropts(void);
  400.  
  401. /* Make certain httpd variables readable by modules */
  402. void take_httpd_vars(void)
  403. {
  404.   int i;
  405.   char *p, buf[MAX_NAMELEN+1];
  406.   var_noexport=1;
  407.   for(i=0;i<HTTPD_VAR_NO;i++) {
  408.    snprintf(buf,sizeof(buf),"httpd_%s",httpd_vars[i]);
  409.    if((p=getenv(httpd_vars[i]))!=NULL) setvar(buf,p);
  410.   }
  411.   var_noexport=0;
  412.  
  413.   for(i=0;i<unsetvarcnt;i++) unsetenv(unsetvars[i]);
  414.    /* IPv4 IPv6*/
  415.   p=getenv("REMOTE_ADDR");if(p!=NULL && (strcmp(p,"127.0.0.1")==0 || strcmp(p,"::1")==0)) human_access=1;
  416.   p=getenv("HTTP_REFERER"); if(p!=NULL && *p!=0) setvar("wims_referer",p);
  417. }
  418.  
  419. /* cookie2session */
  420. void cookie2session(void)
  421. {
  422.   char cksession[64], psession[32], *ckey, *p;
  423.   char nbuf[MAX_FNAME+1];
  424.  
  425.   if(mode==mode_popup) return;
  426.   if(cookiegot[0]==0) {
  427.    ckset: cookiegot[0]=0; setcookie=1; return;
  428.   }
  429.   p=getvar("special_parm");
  430.   if(p!=NULL && strcmp(p,"ignorecookie")==0) return;
  431.   mystrncpy(cksession,cookiegot,sizeof(cksession));
  432.   ckey=strchr(cksession,'-');
  433.   if(ckey==NULL) goto ckset; else *ckey++=0;
  434.   p=getvar("wims_session"); if(p==NULL) p="";
  435.   if(strstr(p,"new")!=NULL) goto ckset;
  436.   mystrncpy(psession,p,sizeof(psession));
  437.   p=strchr(psession,'_'); if(p!=NULL) *p=0;
  438.   if(psession[0]!=0) {
  439.     if(strcmp(psession,cksession)==0) return;
  440.     if(session_exists(psession)) goto ckset;
  441.     if(session_exists(cksession)) goto change;
  442.   }
  443.   else {
  444.     if(!session_exists(cksession)) return;
  445.     change:
  446.     p=getenv("HTTPS");
  447.     if(p!=NULL && strcasecmp(p,"on")==0) goto ckset;
  448.     mkfname(nbuf,"%s/%s/var",session_dir,cksession);
  449.     getdef(nbuf,"w_wims_ismanager",tmplbuf);
  450.     if(tmplbuf[0]!=0 && tmplbuf[0]!='0') goto ckset;
  451.     getdef(nbuf,"w_wims_protocol",tmplbuf);
  452.     if(strcasecmp(tmplbuf,"https")==0) goto ckset;
  453.     mkfname(nbuf,"%s/%s/var.stat",session_dir,cksession);
  454.     getdef(nbuf,"wims_user",tmplbuf);
  455.     if(tmplbuf[0]!=0) goto ckset;
  456.     force_setvar(ro_name[ro_session],cksession);
  457.     setsesdir(cksession);
  458.     force_setvar("wims_subsession","");
  459.     session_serial=0;
  460.   }
  461. }
  462.  
  463. void determine_font(char *l)
  464. {
  465.   int i;
  466.  
  467.   if(l==NULL || *l==0) return;
  468.   for(i=0;i<charname_no && memcmp(charname[i].name,l,2);i++);
  469.   if(i<charname_no) setvar("wims_main_font",charname[i].font);
  470. }
  471.  
  472. void determine_dirn(char *l)
  473. {
  474.   int i;
  475.  
  476.   if(l==NULL || *l==0) return;
  477.   for(i=0;i<dirnname_no && memcmp(dirnname[i].name,l,2);i++);
  478.   if(i<dirnname_no) setvar("wims_main_dirn",dirnname[i].dirn);
  479. }
  480.  
  481. void predetermine_language(void)
  482. {
  483.   char *p;
  484.   int i,n;
  485.  
  486.   if(pre_language[0]!=0) p=pre_language;
  487.   else p=getenv("HTTP_ACCEPT_LANGUAGE");
  488.   if(p!=NULL && strlen(p)>=2) {
  489.     for(i=0;i<available_lang_no && memcmp(p,available_lang[i],2)!=0;i++);
  490.     if(i<available_lang_no) goto lend;
  491.   }
  492.   p=getenv("HTTP_USER_AGENT");
  493.   if(p!=NULL && strlen(p)>=5) {
  494.     char *q;
  495.     if((q=strchr(p,'['))!=NULL && islower(*(q+1)) && islower(*(q+2)) && *(q+3)==']') {
  496.         char bb[4];
  497.         bb[0]=*(q+1);bb[1]=*(q+2);bb[2]=0;
  498.         for(i=0;i<available_lang_no && memcmp(bb,available_lang[i],2)!=0;i++);
  499.         if(i<available_lang_no) {
  500.           memmove(lang,bb,2); lang[2]=0;
  501.           goto lend2;
  502.         }
  503.     }
  504.   }
  505.   p=getenv("HTTP_HOST"); if(p==NULL) goto lend2;
  506.   n=strlen(p); if(n<=3 || *(p+n-3)!='.') goto lend2;
  507.   p=p+n-2;
  508.   for(i=0;i<available_lang_no && memcmp(p,available_lang[i],2)!=0;i++);
  509.   if(i<available_lang_no) {
  510.     lend: memmove(lang,p,2); lang[2]=0;
  511.     lend2: determine_font(lang);determine_dirn(lang);
  512.   }
  513. }
  514.  
  515. /* print a special page */
  516. void put_special_page(char *pname)
  517. {
  518.   determine_font(lang);
  519.   determine_dirn(lang);
  520.   phtml_put_base(mkfname(NULL,"%s.phtml.%s",pname,lang),0);
  521.   write_logs();free(var_str);
  522. }
  523.  
  524. /* check whether the connection is a site manager. */
  525. void manager_check(void)
  526. {
  527.   char *p, *pp, buf[16];
  528.   struct stat confstat;
  529.   int i;
  530.  
  531.   manageable=0;
  532.   if(robot_access || *manager_site==0 || checkhost(manager_site)<1)
  533.     goto mend;
  534.   if(manager_https) {
  535.     p=getenv("HTTPS");
  536.     if(p==NULL || strcmp(p,"on")!=0) goto mend;
  537.   }
  538. /* IPv4 IPv6*/
  539.   if(strcmp(remote_addr,"127.0.0.1")==0 || strcmp(remote_addr,"::1")==0) {
  540.     int port, port2;
  541.     char tester[128];
  542.     p=getenv("REMOTE_PORT"); if(p==NULL) goto mend;
  543.     port=atoi(p); if(port<1024 || port>65535) goto mend;
  544.     p=getenv("SERVER_PORT"); if(p==NULL) goto mend;
  545.     port2=atoi(p); if(port2>=10000 || port2<=0) goto mend;
  546. /* this is very non-portable */
  547.     manageable=1;
  548.     accessfile(tmplbuf,"r","/proc/net/tcp");
  549.     snprintf(tester,sizeof(tester)," 0100007F:%04X 0100007F:%04X ",
  550.            port,port2);
  551.     p=strstr(tmplbuf,tester);
  552.     if(p!=NULL) {
  553.       pp=strchr(p,'\n'); if(pp!=NULL) *pp=0;
  554.       if(strlen(p)>=75) {
  555.         p=find_word_start(p+70); *find_word_end(p)=0;
  556.         if(atoi(p)==geteuid()) manageable=2;
  557.       }
  558.     }
  559.   }
  560.   else manageable=1;
  561.   i=stat(config_file,&confstat);
  562.   if(i==0 && manageable>0 && (confstat.st_mode&(S_IRWXO|S_IRWXG))!=0) manageable=-1;
  563.   if(manageable>0 && !trusted_module()) manageable=0;
  564.   if(manageable==1) {
  565.     accessfile(tmplbuf,"r","%s/.manager",session_prefix);
  566.     if(strstr(tmplbuf,"yes")!=NULL) manageable=2;
  567.   }
  568.   if(manageable==1) {
  569.     p=getvar(ro_name[ro_module]);
  570.     if(p!=NULL && strncmp(p,"adm/manage",strlen("adm/manage"))==0) {
  571.       struct stat pstat;
  572.       if(stat("../log/.wimspass",&pstat)==0) {
  573.         if((S_IFMT&pstat.st_mode)!=S_IFREG ||
  574.            ((S_IRWXO|S_IRWXG)&pstat.st_mode)!=0)
  575.           manageable=-2;
  576.       }
  577.     }
  578.   }
  579.   mend:
  580.   mystrncpy(buf,int2str(manageable),sizeof(buf));
  581.   force_setvar("wims_ismanager",buf);
  582.   if(manageable>=2) {
  583.     struct rlimit rlim;
  584.     rlimit_cpu*=10;
  585.     rlim.rlim_cur=rlim.rlim_max=rlimit_cpu;
  586.     setrlimit(RLIMIT_CPU,&rlim);
  587.     mystrncpy(buf,int2str(rlimit_cpu),sizeof(buf));
  588.     setvar("wims_cpu_limit",buf);
  589.     initalarm();
  590.   }
  591. }
  592.  
  593. /* check for robot access */
  594. void robot_check(void)
  595. {
  596.   char *ua, *p, *ses, *c, *mod;
  597.   int i;
  598.  
  599.   if(human_access) return;
  600.   mod=getvar(ro_name[ro_module]);
  601.   if(mod!=NULL && strcmp(mod,"adm/raw")==0) return;
  602.   ses=getvar(ro_name[ro_session]);
  603. /* user has valid session; OK */
  604.   if(ses!=NULL && strncmp(ses,robot_session,strlen(robot_session))!=0
  605.      && strchr(ses,'/')==NULL
  606.      && ftest(mkfname(NULL,"%s/%s",s2_dir,ses))==is_dir)
  607.     return;
  608.   ua=getenv("HTTP_USER_AGENT"); if(ua==NULL) ua="";
  609.   ua=find_word_start(ua);
  610.   if(strncasecmp(ua,"Mozilla",strlen("Mozilla"))==0 &&
  611.      (p=strstr(ua,"compatible"))!=NULL)
  612.     ua=find_word_start(find_word_end(p));
  613.   if(*ua) {
  614.     for(i=0;i<good_agent_no
  615.         && strncasecmp(ua,good_agent[i],strlen(good_agent[i]));i++);
  616.     if(i<good_agent_no) return;
  617.     for(i=0;i<bad_agent_no
  618.         && strstr(ua,bad_agent[i])==NULL;i++);
  619.     if(i<bad_agent_no) user_error("trapped");
  620.   }
  621.   force_setvar(ro_name[ro_session],robot_session);
  622.   setsesdir(robot_session);
  623.   c=getvar(ro_name[ro_cmd]);
  624.   robot_access=1;
  625.   if(c!=NULL && strcmp(c,"new") && strcmp(c,"intro")) {
  626.     force_setvar(ro_name[ro_cmd],"robot_error");
  627.     nph_header(450); put_special_page("robot");
  628.     flushoutput(); flushlog(); exit(0);
  629.   }
  630. }
  631.  
  632. /* type=0: ordinary; type=1: multipart/form-data */
  633. void parse_query_string(int len, int type)
  634. {
  635.   int i,j,l,v,cmd_defined;
  636.   int parenth=-1, ll, lb, dlen;
  637.   char *start, *p, *p1, *pt, *b1="";
  638.  
  639.   cmd_defined=0;
  640.   setvar("wims_subsession","");
  641.   ll=lb=0;
  642.   if(type) {
  643.     ll=strlen(mpboundary);
  644.     start=strstr(var_str,mpboundary);
  645.     if(start==NULL) start=var_str+strlen(var_str);
  646.     if(strstr(var_str,"\r\n\r\n")!=NULL) b1="\r\n\r\n";
  647.     else b1="\n\n";
  648.     lb=strlen(b1);
  649.   }
  650.   else start=var_str;
  651.   for(v=0, p1=start;p1<var_str+len;p1+=l) {
  652.     if(type) {
  653.       char *p2, *p3, *p4, *p5;
  654.       p2=p1+ll; p3=memstr(p2,mpboundary,var_str+len-p2); l=p3-p1;
  655.       p=memstr(p2,b1,var_str+len-p2); if(p>=p3) continue;
  656.       p+=lb;
  657.       if(p3<var_str+len) {
  658.         while(*p3!='\n' && p3>p2) p3--;
  659.         *p3=0;
  660.         p3--; if(*p3=='\r') *p3=0;
  661.       }
  662.       dlen=p3-p;
  663.       p2=memstr(p2,"name=",p3-p2); if(p2>=p3) continue;
  664.       p2+=strlen("name="); if(*p2=='"') p2++;
  665.       for(p3=p2; myisalnum(*p3) || strchr("._",*p3)!=NULL; p3++);
  666.       if(p3==p2) continue;
  667.         if(p3-p2==strlen("wims_deposit") &&
  668.            strncmp(p2,"wims_deposit",p3-p2)==0) {
  669.           p4=memstr(p1,"filename=",p-p1); if(p4<p) {
  670.             p4+=strlen("filename="); if(*p4=='"') {
  671.               p4++; p5=strchr(p4,'"');
  672.               if(p5==NULL || p5-p4>=MAX_FNAME) goto emptyquote;
  673.             }
  674.             else {
  675.               emptyquote:
  676.               for(p5=p4; p5<p && !isspace(*p5) &&
  677.                   strchr(";\"~#*?=,'",*p5)==NULL; p5++);
  678.             }
  679.             if(p5>p4) {
  680.               *p5=0;
  681.               for(p5--;
  682.                   p5>=p4 && !isspace(*p5) && strchr("/\\:",*p5)==NULL;
  683.                   p5--);
  684.               if(p5>=p4) p4=p5+1;
  685.               if(*p4==0) goto noname;
  686.               if(strstr(p4,"..")!=NULL || *p4=='.')
  687.                 p4="noname.file";
  688.               setvar("wims_deposit",p4);
  689.             }
  690.             else {
  691.               noname: setvar("wims_deposit","noname.file");
  692.             }
  693.           }
  694.           deplen=dlen;
  695.         }
  696.         *p3=0; l-=p2-p1; p1=p2;
  697.     }
  698.     else {
  699.       p1=find_word_start(p1);
  700.       l=strlen(p1)+1; p=strchr(p1,'=');
  701.       if(p==NULL) p=p1+strlen(p1);
  702.       if(*p==0 && l>1) {
  703.         user_variable[v].name="no_name";
  704.         user_variable[v].value=p1;
  705.         coord_input=1;
  706.         goto nnext;
  707.       }
  708.       *p++=0;
  709.     }
  710. /* empty name or empty value: ignore */
  711.     if(*p1==0 || *p==0) continue;
  712. /* We do not treat names containing '.' */
  713.     for(pt=strchr(p1,'.'); pt; pt=strchr(++pt,'.')) *pt='_';
  714. /* Restrictions on variable names */
  715.     for(pt=p1; myisalnum(*pt) || *pt=='_'; pt++);
  716.     if(*pt) continue;
  717.     if(strcmp(p1,"wims_deposit")!=0) _tolinux(p);
  718. /* This is a restriction:
  719.  * Every parameter must have matching parentheses.
  720.  */
  721.     if(parenth==-1 && strncmp(p1,"freepar_",strlen("freepar_"))!=0
  722.          && strcmp(p1,"wims_deposit")!=0
  723.          && check_parentheses(p,1)) parenth=v;
  724.     if(strcmp(p1,"special_parm")==0 && strcmp(p,"wims")==0)
  725.         human_access=1;
  726.     j=search_list(ro_name,RO_NAME_NO,sizeof(ro_name[0]),p1);
  727.     if(j>=0) {
  728.       if(j==ro_session) {
  729.         p=find_word_start(p); *find_word_end(p)=0;
  730.         if(strlen(p)>MAX_SESSIONLEN) continue;
  731.         if(strcmp(p,robot_session)==0) p="";
  732.         if(strcasecmp(p,"popup")==0) {
  733.           mode=mode_popup;
  734.           force_setvar("wims_mode","popup");
  735.           force_setvar("session","");
  736.           continue;
  737.         }
  738.       }
  739.       if(j==ro_module) module_defined=1;
  740.       if(j==ro_cmd) {
  741.         p=find_word_start(p); *find_word_end(p)=0;
  742.         if(strlen(p)>16) continue;
  743.         cmd_defined=1;
  744.       }
  745.       if(j==ro_lang) {
  746.         if(strlen(p)!=2) continue;
  747.         for(i=0;i<available_lang_no && strcmp(available_lang[i],p)!=0;i++);
  748.         if(i<available_lang_no) {user_lang=1; ovlstrcpy(lang,p);}
  749.         else continue;
  750.       }
  751. /* strip leading and trailing '/'s in module name */
  752.       if(j==ro_module) {
  753.         p=find_word_start(p); *find_word_end(p)=0;
  754.         while(*p=='/') p++;
  755.         while(*p!=0 && *(p+strlen(p)-1)=='/') *(p+strlen(p)-1)=0;
  756.         if(strlen(p)>MAX_MODULELEN) continue;
  757.       }
  758.       setvar(p1,p);
  759.       if(j==ro_session && mode!=mode_popup) {
  760.         char *pp, *pr;
  761.         char buf[1024];
  762.         mystrncpy(buf,p,sizeof(buf));
  763.         if((pp=strchr(buf,'.'))!=NULL) {
  764.           *pp++=0; session_serial=atoi(pp);
  765.           if(pp<0) pp=0;
  766.         }
  767.         else session_serial=0;
  768.         pp=strchr(buf,'_');
  769.         if(pp!=NULL && (pr=strstr(pp,"_mhelp"))!=NULL) {
  770.           *pr=0; ismhelp=1; lastout_file=-1;
  771.           setvar("wims_inssub","mh");
  772.         }
  773.         force_setvar("wims_session",buf);
  774.         if(pp!=NULL) force_setvar("wims_subsession",pp);
  775.       }
  776.       continue;
  777.     }
  778.     user_variable[v].name=p1;
  779.     user_variable[v].value=p;
  780. nnext:v++; if(v>=MAX_VAR_NUM) user_error("too_many_variables");
  781.   }
  782.   user_var_no=v;
  783.   if(parenth>=0) {
  784.     char buf[16];
  785.     mystrncpy(buf,int2str(user_var_no),sizeof(buf));
  786.     setvar("user_var_no",buf);
  787.     for(i=0;i<user_var_no;i++) {
  788.       snprintf(buf,sizeof(buf),"name%d",i);
  789.       setvar(buf,user_variable[i].name);
  790.       snprintf(buf,sizeof(buf),"value%d",i);
  791.       setvar(buf,user_variable[i].value);
  792.     }
  793.     mystrncpy(buf,int2str(parenth),sizeof(buf));
  794.     setvar("bad_parentheses",buf);
  795.     user_error("unmatched_parentheses");
  796.   }
  797.   p=getenv("SCRIPT_NAME");
  798.   if(p!=NULL && (p=strstr(p,"/getfile/"))!=NULL) {
  799.     p+=strlen("/getfile/");
  800.     force_setvar(ro_name[ro_cmd],commands[cmd_getfile]);
  801.     force_setvar("special_parm",p);
  802.     cmd_defined=1;
  803.   }
  804.   if(module_defined && !cmd_defined) setvar(ro_name[ro_cmd],commands[cmd_intro]);
  805.   robot_check(); cookie2session();
  806. }
  807.  
  808. /* parse special commands */
  809. void special_cmds(void)
  810. {
  811.   char *c, *p;
  812.   int i;
  813.   long int l=-1;
  814.  
  815.   c=getvar(ro_name[ro_cmd]);
  816.   if(c==NULL || *c==0) {  /* no module name nor command */
  817.     setvar(ro_name[ro_module],home_module);
  818.     setvar(ro_name[ro_cmd],commands[cmd_new]);
  819.     return;
  820.   }
  821.   for(i=0;i<CMD_NO && strcmp(commands[i],c)!=0; i++);
  822.   switch(i) {
  823.     case cmd_intro: {
  824.       set_module_prefix();
  825.       default_form_method="get";
  826.       if(ftest(mkfname(NULL,"%s/%s",module_prefix,intro_file))<0) {
  827.         force_setvar(ro_name[ro_cmd],commands[cmd_new]);
  828.         return;
  829.       }
  830.       p=getvar("wims_session");
  831.       if(p!=NULL && *p!=0) {
  832.         if(set_session_prefix()==0) check_session();
  833.         else {
  834.           trap_check(p);
  835.           if(strchr(p,'_')!=NULL && strchr(p,'/')==NULL) {
  836.             get_static_session_var();
  837.           }
  838.         }
  839.       }
  840. /* determine http protocol name. How to detect? */
  841.       p=getenv("HTTPS");
  842.       if(p!=NULL && strcmp(p,"on")==0) {
  843.         protocol="https"; set_protocol();
  844.       }
  845.       force_setvar("wims_protocol",protocol);
  846.       determine_font(lang);
  847.       determine_dirn(lang);
  848.       main_phtml_put(intro_file); debug_output();
  849.       introend: write_logs();free(var_str);
  850.       delete_pid(); exit(0);
  851.     }
  852.     case cmd_ref: {
  853.       set_module_prefix();
  854.       default_form_method="get";
  855.       p=getvar("wims_session");
  856.       if(p!=NULL && *p!=0) {
  857.         if(set_session_prefix()==0) check_session();
  858.         else trap_check(p);
  859.       }
  860.       determine_font(lang);
  861.       determine_dirn(lang);
  862.       main_phtml_put(ref_file); goto introend;
  863.     }
  864.     case cmd_getins: {
  865.       c=getvar(ro_name[ro_special_parm]);
  866.       if(c==NULL || *c==0) {
  867.         user_error_nolog=1; user_error("no_insnum");
  868.       }
  869.       if(*c=='/' || strstr(c,"..")!=NULL) goto badins;
  870.       set_session_prefix();
  871.       if(strstr(session_prefix,"robot")!=NULL) exit(0);
  872.       l=filelength("%s/%s",s2_prefix,c);
  873.       if(l<0) {
  874.         badins: user_error_nolog=1; user_error("bad_insnum");
  875.       }
  876.       {
  877.         char *fmt;
  878.         fmt=strchr(c,'.');
  879.         if(fmt==NULL) {
  880.             user_error_nolog=1; user_error("bad_insnum");
  881.         }
  882.         else fmt++;
  883.  
  884.         nph_header(200);
  885. /* insert format problem; bricolage */
  886.         printf("Content-type: image/%s\r\n\
  887. Content-length: %ld\r\n\r\n",fmt,l);
  888.         catfile(stdout,"%s/%s",s2_prefix,c); exit(0);
  889.       }
  890.     }
  891.     case cmd_getfile: {
  892.       char fname[MAX_FNAME+1];
  893.       c=getvar(ro_name[ro_special_parm]);
  894.       if(c==NULL || *c==0) {
  895.         user_error_nolog=1; user_error("no_insnum");
  896.       }
  897.       if(*c=='/' || strstr(c,"..")!=NULL) goto badfile;
  898.  
  899.       set_session_prefix();
  900.       if(strstr(session_prefix,"robot")!=NULL) exit(0);
  901.       mkfname(fname,"%s/getfile/%s",session_prefix,c);
  902.       l=filelength("%s",fname);
  903.       if(l<0 && strchr(session_prefix,'_')!=NULL) {
  904.         char *pt;
  905.         mystrncpy(fname,session_prefix,sizeof(fname));
  906.         pt=strrchr(fname,'_'); if(pt) *pt=0;
  907.         snprintf(fname+(pt-fname),sizeof(fname)-(pt-fname),
  908.               "/getfile/%s",c);
  909.         l=filelength("%s",fname);
  910.       }
  911.       if(l<0) {
  912.         badfile: user_error_nolog=1; user_error("bad_insnum");
  913.       }
  914.       if(l>512*1024) {
  915.         struct rlimit rlim;
  916.         rlimit_cpu*=l/(10*1024);
  917.         rlim.rlim_cur=rlim.rlim_max=rlimit_cpu;
  918.           initalarm();
  919.       }
  920.       {
  921.         char *p1;
  922.         char mime[MAX_LINELEN+1];
  923.         for(p1=c+strlen(c);p1>c && isalpha(*(p1-1)); p1--);
  924.         ovlstrcpy(mime,"application/octet-stream");
  925.         if(p1>c && *(p1-1)=='.') {
  926.           setvar("translator_unknown",mime);
  927.           setvar("dictionary","bases/sys/mime");
  928.           snprintf(mime,sizeof(mime),"translator %s",p1);
  929.           calc_exec(mime);
  930.         }
  931.         nph_header(200);
  932.         printf("Content-type: %s\r\n\
  933. Content-length: %ld\r\n\r\n",mime,l);
  934.         catfile(stdout,"%s",fname); exit(0);
  935.       }
  936.     }
  937.     case cmd_close: {
  938.       char *p, b2[32]; int w;
  939.       char nbuf[MAX_FNAME+1], vbuf[MAX_LINELEN+1];
  940.       p=getvar(ro_name[ro_session]);
  941.       if(p==NULL || strlen(p)<10 ||
  942.          strchr(p,'/')!=NULL) return;
  943.       mystrncpy(b2,p,sizeof(b2));
  944.       p=strchr(b2,'.'); if(p!=NULL) *p=0;
  945.       mkfname(nbuf,"%s/%s/var.stat",session_dir,b2);
  946.       getdef(nbuf,"wims_caller",vbuf);
  947.       if(vbuf[0]!=0) force_setvar(ro_name[ro_session],vbuf);
  948.       w=wrapexec; wrapexec=1;
  949.       call_sh("rm -Rf %s/%s* %s/%s* >/dev/null 2>&1",session_dir,b2,s2_dir,b2);
  950.       wrapexec=w; cookiegot[0]=0;
  951.       force_setvar(ro_name[ro_cmd],"new");
  952.     }
  953.     default: return;
  954.   }
  955. }
  956.  
  957. /* This is run only when manually invoking the program.
  958.  * Verifies the orderedness of various list tables.
  959.  */
  960. int verify_tables(void)
  961. {
  962.     if(verify_order(calc_routine,CALC_FN_NO,sizeof(calc_routine[0]))) return -1;
  963.     if(verify_order(exec_routine,EXEC_FN_NO,sizeof(exec_routine[0]))) return -1;
  964.     if(verify_order(main_config,MAIN_CONFIG_NO,sizeof(main_config[0]))) return -1;
  965.     if(verify_order(mathname,mathname_no,sizeof(mathname[0]))) return -1;
  966.     if(verify_order(hmname,hmname_no,sizeof(hmname[0]))) return -1;
  967.     if(verify_order(ro_name,RO_NAME_NO,sizeof(ro_name[0]))) return -1;
  968.     if(verify_order(distr_cmd,distr_cmd_no,sizeof(distr_cmd[0]))) return -1;
  969.     if(verify_order(internal_name,INTERNAL_NAME_NO,
  970.                 sizeof(internal_name[0]))) return -1;
  971.     if(verify_order(tmathfn,tmathfn_no,sizeof(tmathfn[0]))) return -1;
  972.     if(verify_order(tmathvar,tmathvar_no,sizeof(tmathvar[0]))) return -1;
  973.     if(verify_order(modindex,MODINDEX_NO,sizeof(modindex[0]))) return -1;
  974.     if(verify_order(exportvars,exportvarcnt,sizeof(exportvars[0]))) return -1;
  975.     if(evaltab_verify()) return -1;
  976.     if(textab_verify()) return -1;
  977.     return 0;
  978. }
  979.  
  980. void config_defaults(void)
  981. {
  982.     int i;
  983.     for(i=0;i<MAIN_CONFIG_NO;i++) {
  984.       if((1&main_config[i].is_integer)==1) {
  985.           int *pi = (int*)main_config[i].address;
  986.           printf("DF_%s=%d\n",main_config[i].name, *pi);
  987.         }
  988.       else {
  989.             char **ps = (char**)main_config[i].address;
  990.           printf("DF_%s=%s\n",main_config[i].name,*ps);
  991.         }
  992.     }
  993. }
  994.  
  995. /* get and set useroptions */
  996. void useropts(void)
  997. {
  998.     char *p;
  999.     setvar("lang",lang);
  1000.     p=getvar("useropts");
  1001.     if(p==NULL || *p==0) p=getvar("wims_useropts");
  1002.     if(p!=NULL && *p!=0) {
  1003.       if(myisdigit(p[0])) {
  1004.         usertexsize=p[0]-'0';
  1005.         /* fourth digit is for special fonts*/
  1006.         if(p[1]!=0) { mathalign_base=p[1]-'0'; }
  1007.       }
  1008.       if(myisdigit(p[3]) && p[3]!=0){ spec_font=p[3]-'0';}
  1009.     }
  1010.     if(mathalign_base==1) {
  1011.         mathalign_sup1="<sup>"; mathalign_sup2="</sup>";
  1012.     } else mathalign_sup1=mathalign_sup2="";
  1013. }
  1014.  
  1015. /* popup module help */
  1016. void mhelp(void)
  1017. {
  1018.     char *p, buf[MAX_LINELEN+1];
  1019.     main_phtml_put(""); buf[0]=0;
  1020.     if(cmd_type!=cmd_help) {
  1021.       phtml_put_base("closemhelp.phtml",0);
  1022.     }
  1023.     else {
  1024.       phtml_put_base("mhelpheader.phtml",0);
  1025.       p=getvar("special_parm");
  1026.       if(p!=NULL && strcmp(p,"about")==0)
  1027.         phtml_put("about.phtml",0);
  1028.       else phtml_put("help.phtml",0);
  1029.       phtml_put_base("mhelptail.phtml",0);
  1030.       exec_tail(buf);
  1031.     }
  1032. }
  1033.  
  1034. #define READSTDIN_WINDOW 4096
  1035.  
  1036. void readstdin(int len)
  1037. {
  1038.     int ll, l1, lt, lr;
  1039.     int cpulim;
  1040.  
  1041.     cpulim=rlimit_cpu; rlimit_cpu=3;
  1042.     lr=len; l1=0;
  1043.     while(lr>0) {
  1044.       nowtime=time(0); initalarm();
  1045.       ll=lr; if(ll>READSTDIN_WINDOW) ll=READSTDIN_WINDOW;
  1046.       lt=fread(stdinbuf+l1,1,ll,stdin);
  1047.       if(lt!=ll) user_error("parm_too_long");
  1048.       lr-=ll; l1+=ll;
  1049.     }
  1050.     if(l1!=len) user_error("parm_too_long");
  1051.     stdinbuf[len]=0; rlimit_cpu=cpulim;
  1052. }
  1053.  
  1054. /* input: p=QUERY_STRING. output: parameter length. */
  1055. /* Netscape puts form content into /tmp. */
  1056. int formdata(char *p)
  1057. {
  1058.     char *pp;
  1059.     int inlen;
  1060.     char *ctype;
  1061.     inlen=0; ctype=getenv("CONTENT_TYPE");
  1062.     if(ctype==NULL || strstr(ctype,"multipart/form-data")==NULL
  1063.        || (p=strstr(ctype,"boundary="))==NULL) {
  1064.       bad: stdinbuf=""; return 0;
  1065.     }
  1066.     pp=getenv("CONTENT_LENGTH");
  1067.     if(pp==NULL) goto bad;
  1068.     inlen=atoi(pp); if(inlen<=10) goto bad;
  1069.     if(inlen>=MAX_DEPOSITLEN) user_error("parm_too_long");
  1070.     stdinbuf=xmalloc(inlen+1); readstdin(inlen);
  1071.     p+=strlen("boundary=");
  1072.     for(pp=p;myisalnum(*pp) || *pp=='-'; pp++);
  1073.     if(pp-p<sizeof(mpboundary)-2) {
  1074.       memmove(mpboundary,p,pp-p); mpboundary[pp-p]=0;
  1075.     }
  1076. /* empty data */
  1077.     if(strstr(stdinbuf,mpboundary)==NULL || strstr(stdinbuf,"name=")==NULL) {
  1078.       free(stdinbuf); goto bad;
  1079.     }
  1080.     form_access=1; post_log();
  1081.     return inlen;
  1082. }
  1083.  
  1084. /* get the content of POST */
  1085. void getpost(void)
  1086. {
  1087.     int ll;
  1088.     char *pp;
  1089.     pp=getenv("CONTENT_LENGTH");
  1090.     if(pp==NULL || (ll=atoi(pp))<=0) {
  1091.       stdinbuf=xmalloc(16); stdinbuf[0]=0;
  1092.     }
  1093.     else {
  1094.       if(ll>QUERY_STRING_LIMIT) user_error("parm_too_long");
  1095.       stdinbuf=xmalloc(ll+16); readstdin(ll);
  1096.       if(ll>0) {
  1097.           setenv("QUERY_STRING",stdinbuf,1);
  1098.           form_access=1; post_log();
  1099.       }
  1100.     }
  1101. }
  1102.  
  1103. void buffer_init(void)
  1104. {
  1105.     struct timeval tv;
  1106.  
  1107.     mcachecnt=readnest=0;
  1108.     mpboundary[0]=cookiegot[0]=cookieset[0]=cwdbuf[0]=0;
  1109.     rscore_class[0]=rscore_user[0]=multiexec_random[0]=0;
  1110.     lastftest[0]=0;
  1111.     lastdatafile[0]=0; lastdata=xmalloc(WORKFILE_LIMIT);
  1112.     outptr=outbuf;
  1113.     instex_src[0]=instex_fname[0]=module_prefix[0]=0;
  1114.     examlogf[0]=examlogd[0]=exam_sheetexo[0]=0;
  1115.     stdinbuf=NULL;
  1116.     mkfname(tmp_dir,"../tmp/forall");
  1117.     mkfname(session_dir,"../%s",SESSION_BASE);
  1118.     mkfname(s2_dir,"../%s",S2_BASE);
  1119.     if(gettimeofday(&tv,NULL)) startmtime=startmtime2=0;
  1120.     else {
  1121.       startmtime=((tv.tv_sec%10000)*1000+tv.tv_usec/1000);
  1122.       startmtime2=(tv.tv_sec%1000)*1000000+tv.tv_usec;
  1123.     }
  1124. }
  1125.  
  1126. /**
  1127.  * runs the test suite, to check whether the documented commands of modtool
  1128.  * behave properly.
  1129.  * @param prefix path to the proc file to process
  1130.  * @param p      name of the proc file to proceed
  1131.  * @param vars a list of var names to print.
  1132.  **/
  1133. void test_suite(char *prefix, char *p, char *vars){
  1134.   char *v, *nextv;
  1135.   mystrncpy(module_prefix, prefix, sizeof(module_prefix));
  1136.   exec_read(p);
  1137.   nextv=vars;
  1138.   while (*nextv!='\0'){
  1139.     v=find_word_start(nextv);
  1140.     nextv=find_word_end(v);
  1141.     if (*nextv != '\0'){
  1142.       *nextv++='\0';
  1143.     }
  1144.     v=getvar(v);
  1145.     if(v) puts(v); else putchar('\n');
  1146.   }
  1147. }
  1148.  
  1149. int main(int argc, char *argv[], char *envp[])
  1150. {
  1151.     char *p, homebuf[MAX_FNAME+1], lbuf[32], buf[64];
  1152.     int inlen=0;
  1153. /*    int mfd; */
  1154.  
  1155.     class_dir[0]=0;
  1156.     substitute=substit; buffer_init(); var_init();
  1157. /* WIMS internal locale is always C. */
  1158.     setenv("LANG","C",1); umask(022);
  1159.     setenv("LANGUAGE","us",1);
  1160.     setenv("LC_ALL","C",1);
  1161.     if(argc>1) {
  1162.       if(strcasecmp(argv[1],"table")==0) {
  1163.           if(verify_tables()) internal_error("Table disorder.");
  1164.           else printf("Table orders OK.\n");
  1165.           return 0;
  1166.       }
  1167.       if(strcasecmp(argv[1],"version")==0) {
  1168.           printf("%s",wims_version); return 0;
  1169.       }
  1170.       if(strcasecmp(argv[1],"defaults")==0) {
  1171.           config_defaults(); return 0;
  1172.       }
  1173.       if(strcasecmp(argv[1],"test")==0) {
  1174. /* launches a test suite */
  1175.         if (argc < 5) {
  1176.           printf("Not enough arguments to launch a test; usage:\n");
  1177.           printf("wims test path_to_file name_of_proc_file 'var1 var2 ...'\n\n");
  1178.           printf("the file at path_to_file/name_of_proc_file will be evaluated by wims for\nexec commands, then the values of var1, var2, ... will be printed\nin the standard output, one per line.\n");
  1179.           return 1;
  1180.         }
  1181.         test_suite(argv[2], argv[3], argv[4]);
  1182.         return 0;
  1183.       }
  1184.     }
  1185.     p=getenv("SERVER_SOFTWARE"); if(p!=NULL && strcasecmp(p,"WIMS")==0)
  1186.       httpd_type=httpd_wims;
  1187.     p=getenv("REMOTE_ADDR"); if(p!=NULL) remote_addr=p;
  1188.     p=getenv("REMOTE_HOST"); if(p!=NULL) remote_host=p;
  1189.     nowtime=time(0); now=localtime(&nowtime);
  1190. /* nowtime contains the seconds elapsed from EPOCH (1970)
  1191.    but tm_year is set to current year-1900.
  1192.  */
  1193.     memmove(&Now, now, sizeof(Now)); now=&Now;
  1194.     snprintf(nowstr,sizeof(nowstr),"%04d%02d%02d.%02d:%02d:%02d",
  1195.            (now->tm_year)+1900,(now->tm_mon)+1,now->tm_mday,
  1196.            now->tm_hour,now->tm_min,now->tm_sec);
  1197.     p=getenv("QUERY_STRING");
  1198.     if(p==NULL || *p==0) getpost();
  1199.     else if(strncmp(p,"form-data",9)==0) inlen=formdata(p);
  1200.  
  1201.     force_setvar("wims_now",nowstr);
  1202.     snprintf(lbuf,sizeof(lbuf),"%lu",nowtime);
  1203.     force_setvar("wims_nowseconds",lbuf);
  1204.     nowtime=time(0);
  1205.     initalarm();
  1206.  
  1207.     executed_gotos=insert_no=output_length=0; ins_alt[0]=0;
  1208.     setvar("empty","");       /* lock this variable */
  1209.     setvar("wims_version",wims_version);
  1210.     setvar("wims_version_date",wims_version_date);
  1211.     setvar("wims_main_font","utf-8");
  1212.     take_httpd_vars();
  1213.  
  1214.     main_configure();
  1215.     checklogd();
  1216. /* mfd=shm_open(SHM_NAME,O_RDONLY,-1);
  1217.  * if(mfd==-1) internal_error("Unable to find shared memory.");
  1218.  * shmptr=mmap(0,SHM_SIZE,PROT_READ,MAP_SHARED,mfd,0);
  1219.  * if(shmptr==MAP_FAILED) internal_error("Shared memory failure.");
  1220.  */
  1221.     getppid(); /* this is the first sysmask trigger, must be after checklogd() */
  1222.     predetermine_language();
  1223.     /* modify a few rlimits for 64-bit processors */
  1224.     if (sizeof(long) == 8) {
  1225.       rlimit_as*=2;    /* virtual memory size */
  1226.       rlimit_data*=2;  /* data segment size; maxima requires a lot */
  1227.       rlimit_stack*=2; /* stack size */
  1228.     }
  1229.     set_rlimits();
  1230.     /*init_random();*/
  1231.     seed_time();
  1232.     p=getvar("wims_seed");
  1233.     mystrncpy(buf,p,sizeof(buf));
  1234.     exec_setseed(buf);
  1235.     module_configure();
  1236.     set_job_ident();
  1237.     m_file.name[0]=0;m_file.linecnt=m_file.linepointer=0;
  1238.     p=getenv("QUERY_STRING");
  1239.     if(p==NULL || strlen(p)==0) {
  1240.       setvar("lang",lang);
  1241.       snprintf(homebuf,sizeof(homebuf),"module=%s",home_module);
  1242.       p=homebuf;
  1243.     }
  1244.     if(strlen(p)>=QUERY_STRING_LIMIT) user_error("parm_too_long");
  1245.     if(mpboundary[0]==0) {
  1246.       var_str=xmalloc(strlen(p)+2);
  1247.       parse_query_string(http2env(var_str,p),0);
  1248.     }
  1249.     else {
  1250.       var_str=stdinbuf;
  1251.       parse_query_string(inlen,1);
  1252.     }
  1253.     if(ismhelp) {
  1254.       p=getvar(ro_name[ro_cmd]);
  1255.       if(p==NULL || (strcmp(p,"help")!=0 && strcmp(p,"getins")!=0)) {
  1256.           mhelp(); goto outgo;
  1257.       }
  1258.     }
  1259.     check_exam();
  1260.     useropts();
  1261.     special_cmds();
  1262.     parse_ro_names();
  1263.     manager_check();
  1264.     access_check(0);
  1265. /* it is really for developing in wims, so no use in general */
  1266.   if (1==1) {
  1267.     if(strstr(tmp_debug,"yes")!=NULL && checkhost(manager_site)>=1)
  1268.       trace_file = fopen(mkfname(NULL,"%s/%s",tmp_dir,"trace.txt"),"a");
  1269.   }
  1270.   set_variables();
  1271.   determine_font(getvar("module_language"));
  1272.   determine_dirn(getvar("module_language"));
  1273.   if(!robot_access && session_prefix[0]!=0 && cmd_type!=cmd_help && !ismhelp)
  1274.     lastout_file=creat(mkfname(NULL,"%s/%s",s2_prefix,lastout),
  1275.                  S_IRUSR|S_IWUSR);
  1276.   p=getvar("module_score");
  1277.   if(p!=NULL) force_setvar("wims_seed_score",p);
  1278.   p=getvar("module_category");
  1279.   if(p==NULL || strstr(p,"tool")==NULL) default_form_method="get";
  1280.   if(noout) {
  1281.     write_logs(); save_session_vars();
  1282.     goto outgo;
  1283.   }
  1284.   if(ismhelp) {
  1285.     mhelp();
  1286.   }
  1287.   else {
  1288.     main_phtml_put(html_file);
  1289.     if(lastout_file!=-1) {
  1290.       flushoutput(); close(lastout_file); putlastout();
  1291.     }
  1292.     write_logs(); save_session_vars();
  1293.   }
  1294.   outgo:
  1295.   debug_output();
  1296.   if (trace_file)  { fclose(trace_file); trace_file=NULL; }
  1297.   if(var_str!=stdinbuf) free(var_str);
  1298.   delete_pid();
  1299.   if(mode!=mode_popup && trusted_module()) {
  1300.     p=getvar("wims_mode");
  1301.     if(p!=NULL && strcmp(p,"popup")==0) mode=mode_popup;
  1302.   }
  1303.   if(mode==mode_popup && insert_no==0) {
  1304.     p=getvar("wims_mode");
  1305.     if(p!=NULL && strcmp(p,"popup")==0) {
  1306.       remove_tree(session_prefix);
  1307.  
  1308.       remove_tree(s2_prefix);
  1309.     }
  1310.   }
  1311.   return 0;
  1312. }
  1313.