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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.  
  22. struct {
  23.   char *name;
  24.   char *font;
  25. } charname[]={
  26.   {"en","windows-1252"},
  27.   {"fr","windows-1252"},
  28.   {"es","windows-1252"},
  29.   {"cn","gb2312"},
  30.   {"de","windows-1252"},
  31.   {"it","windows-1252"},
  32.   {"nl","windows-1252"},
  33.   {"si","iso-8859-2"},
  34.   {"ar","iso-8859-6"},
  35.   {"tw","big5"},
  36.   {"pt","windows-1252"},
  37.   {"ca","windows-1252"},
  38.   {"pt","windows-1252"},
  39.   {"ru","iso-8859-5"},
  40.   {"ty","iso-8859-13"}
  41. };
  42.  
  43. #define charname_no (sizeof(charname)/sizeof(charname[0]))
  44.  
  45. /* left to right or right to left writing */
  46. struct {
  47.   char *name;
  48.   char *dirn;
  49. } dirnname[]={
  50.   {"en","ltr"},
  51.   {"fr","ltr"},
  52.   {"es","ltr"},
  53.   {"cn","ltr"},
  54.   {"de","ltr"},
  55.   {"it","ltr"},
  56.   {"nl","ltr"},
  57.   {"si","ltr"},
  58.   {"ar","rtl"},
  59.   {"tw","ltr"},
  60.   {"pt","ltr"},
  61.   {"ca","ltr"},
  62.   {"pt","ltr"},
  63.   {"ru","ltr"},
  64.   {"ty","ltr"}
  65.  
  66. };
  67.  
  68. #define dirnname_no (sizeof(dirnname)/sizeof(dirnname[0]))
  69.  
  70.  
  71. #define evalue strevalue
  72. char *robot_session="../tmp/robot";
  73. int robot_access=0,human_access=0;
  74. int user_error_nolog=0;
  75. char *good_agent[]={
  76.   "Mozilla","Netscape","Opera","WIMS",
  77.   "MSIE","Konqueror","Java"
  78. };
  79. #define good_agent_no (sizeof(good_agent)/sizeof(good_agent[0]))
  80.  
  81. char *bad_agent[]={ /* These are really bad agents: prohibited. */
  82.   "HTTrack","MemoWeb","Teleport","Offline","Wget","eCatch",
  83.   "Powermarks","EmailSiphon", "WebCopier"
  84. };
  85. #define bad_agent_no (sizeof(bad_agent)/sizeof(bad_agent[0]))
  86.  
  87. /* used for debugging */
  88. int debug=0;
  89.  
  90. char class_dir[MAX_FNAME+1]; /* directory name of this class */
  91.  
  92. struct user_variable user_variable[MAX_VAR_NUM];
  93. int user_var_no;
  94.  
  95. struct VAR_DEF var_def[MAX_VAR_NUM];
  96. int defined_var_total;
  97.  
  98. /* Destinated to module error messages */
  99. WORKING_FILE m_file,svar_file,mcache[MAX_MCACHE];
  100. int mcachecnt;
  101.  
  102. /* Limit for any data working files. */
  103. int WORKFILE_LIMIT=2048*1024;
  104.  
  105. /* whether the user has defined language */
  106. int user_lang=0;
  107.  
  108. /* for instex grouping */
  109. int instex_cnt=0, getwimstexsize=1;
  110. char instex_src[MAX_LINELEN+1], instex_fname[MAX_LINELEN+1];
  111. char *instex_processor="tex..gif";
  112.  
  113. /* Cookie management */
  114. char cookiegot[256], cookieset[256], cookieheader[64]="WIMSUSER=";
  115.  
  116. /* multipart boundary */
  117. char mpboundary[1024];
  118. int  deplen=0; /* length of deposit */
  119.  
  120. int confset=0; /* set to 1 if setvar for config */
  121.  
  122. /* Operating mode: default, popup, raw, etc. */
  123.  
  124. int mode=mode_default;
  125.  
  126. /* Switch; notice subroutines wherether we are outputing. */
  127. int outputing;
  128.  
  129. char *home_module="home"; /* name of home module */
  130. extern char **environ;      /* table of environment variables */
  131. int module_defined=0;
  132.  
  133.         /* directory prefix buffers */
  134. char session_prefix[MAX_FNAME+1], s2_prefix[MAX_FNAME+1], module_prefix[MAX_FNAME+1];
  135.  
  136. char *stdinbuf;
  137. int sesrandomtab[MAX_SESRANDOM]; /* session random values */
  138. char multiexec_random[64];
  139. int executed_gotos; /* number of goto's executed. to check with GOTO_LIMIT. */
  140. int insert_no; /* number of instex, insplot, insPLOT. */
  141. int output_length; /* length of the output. */
  142. int isexam=0; /* non-zero if request is exam */
  143. int simuxam=0; /* exam is simulation */
  144. int is_multiexec=0; /* for execredirected */
  145. int multiexec_index;
  146. int direct_datafile=0;
  147. int exec_is_module=0;
  148.   /* root directory of modules */
  149. char *module_dir="modules";
  150. int new_session=0; /* =1 if new session created */
  151. int good_httpd=0; /* Whether the http server is intelligent */
  152. /* int internal_sql=0; */ /* for internal sql use */
  153. int direct_exec=0; /* calc routine is exected by exec if 1 */
  154. int print_precision=8; /* precision when printing real numbers */
  155. int session_serial; /* request serial for session control */
  156. int form_access=0; /* identifies form access, for robot identification */
  157. int lastout_file=-1; /* file to hold last output */
  158. char *instex_style=""; /* "": text "$": math "$$": displaymath */
  159. int instex_usedynamic=0; /* always dynamic if 1 */
  160. int wrapexec=0; /* if set to 1, change uid (nobody) to euid (wims).
  161.                  * if set to -1, change euid to uid when exec(). */
  162. int parm_restore=0; /* Restoring saved parameters? */
  163. int exec_wait=1; /* whether to wait for fork return */
  164. int execnt=0; /* count executions */
  165. int readnest; /* nested read count */
  166. int mfilecnt=0; /* count working files */
  167. int forceresume=0; /* force user to resume old request */
  168. int manageable=0; /* whether the connection may be site manager
  169.                    * 0: no; 1: maybe; 2: sure */
  170. int ismhelp=0;  /* 1 if session is in mhelp. */
  171. int getvar_len; /* length of the last-got variable. */
  172. int noout=0; /* if set to 1 then output is skipped */
  173. char tmp_dir[MAX_FNAME+1]; /* temporary directory */
  174. char *bin_dir="bin"; /* directory containing executable scripts and programs. */
  175. char cwdbuf[MAX_FNAME+1]; /* store current working directory */
  176. char var_hacking=0; /* Trying to hack a variable? */
  177. char *tmp_debug="no";
  178. char *tmp_debug_var="";
  179. char ins_alt[MAX_LINELEN+1]; /* dynamic insertion alternative text */
  180. char *devel_modules="close"; /* whether to open devel modules */
  181. int isclassmodule=0; /* 1 if the module is class module */
  182. int isdevelmodule=0; /* development module? */
  183. int setcookie=0; /* 1 if need to set cookie */
  184. int killpid=0; /* pid of process to kill by alarm */
  185. char *mathalign_sup1, *mathalign_sup2; /* see mathalign_base */
  186. int substnest=0; /* nesting level of substit() */
  187. int exodepOK=1;
  188. long int startmtime; /* start time in milliseconds */
  189. long int startmtime2; /* start time in microseconds */
  190. int backslash_insmath=0; /* \(...) substitution? */
  191. char examlogf[MAX_FNAME+1]; /* examlog file name */
  192. char examlogd[MAX_FNAME+1]; /* examlog file name */
  193. char exam_sheetexo[32]; /* sheet data of an exam */
  194. char loadavg[64];
  195. /* user file variable access control. */
  196. char *var_readable, *var_writable, *var_nr, *var_nw, *var_pfx;
  197. int hostcquota;
  198. int var_noexport; /* do not export variable */
  199.  
  200. char tmplbuf[MAX_LINELEN+1]; /* for temporary uses not thru subroutines. */
  201.  
  202. struct tm *now, Now; /* time of request */
  203. time_t nowtime, limtime, limtimex;
  204. char nowstr[32];
  205.  
  206. /* Resource limits. Capital names are reserved by system. */
  207. int rlimit_cpu=20;  /* cpu time in seconds */
  208. int rlimit_fsize=8388608;/* file size */
  209. int rlimit_as=614457600;/* virtual memory size */
  210. int rlimit_data=204857600;/* data segment size; maxima requires a lot (must be lower than rlimit_as)*/
  211. int rlimit_stack=2097152;/* stack size */
  212. int rlimit_core=0; /* core dump size */
  213. int rlimit_rss=16777216; /* resident size */
  214. int rlimit_nproc=1024; /* number of processes */
  215. int rlimit_nofile=512; /* number of open files */
  216. int rlimit_memlock=2097152;/* locked-in-memory address space */
  217.  
  218. char *var_str; /* malloc'ed buffer to hold translated query_string */
  219.  
  220. /* buffer to hold module's variable definition file, malloc'ed. */
  221. char *var_def_buf;
  222.  
  223. /* job_identifier is even a reserved variable name */
  224. char job_identifier[32];
  225.  
  226. /* site manager definition IPv4 IPv6*/
  227. char *manager_site="127.0.0.1 ::1";
  228. int   manager_https=0;
  229.  
  230. /* sheet and exercise information */
  231. int wims_sheet=0,wims_exo=0;
  232.  
  233. /* Form method: get or post */
  234. char *default_form_method="post";
  235.  
  236. /* Je suis maintenant oblige de passer a l'anglais
  237.  * pour la langue de defaut.
  238.  */
  239. char lang[16]="en";
  240. char available_lang[MAX_LANGUAGES][4]={"en","fr"};
  241. int available_lang_no=2;
  242. char pre_language[4]="";
  243. FILE *trace_file;
  244. int trace_indent=0;
  245. char *protocol="http"; /* http or https */
  246.  
  247. /* check for coordinate input. This will mean that
  248.  * the request is manual, but not robot.
  249.  */
  250. int coord_input=0;
  251.  
  252. /* These are readonly environment variable names
  253.  * special parm used for special cmds (getins, etc).
  254.  */
  255. char *ro_name[]={
  256.   "cmd",
  257.   "empty",
  258.   "lang",
  259.   "module",
  260.   "session",
  261.   "special_parm",
  262.   "special_parm2",
  263.   "special_parm3",
  264.   "special_parm4",
  265.   "useropts" ,
  266.   "wims_session",
  267.   "wims_subsession",
  268.   "wims_window",
  269.   "worksheet"
  270. };
  271.  
  272. int RO_NAME_NO=(sizeof(ro_name)/sizeof(ro_name[0]));
  273.  
  274. int cmd_type;
  275. char *commands[]={
  276.     "intro" , "new" , "renew" , "reply" , "config" , "hint" , "help" ,
  277.       "resume", "next", "getins", "getframe", "getfile", "close", "ref"
  278. };
  279.  
  280. int CMD_NO=(sizeof(commands)/sizeof(commands[0]));
  281.  
  282. /* stat=0: saved variables
  283.  * all names starting with wims_priv_ are also internal.
  284.  */
  285. struct internal_name internal_name[]={
  286.   {"accessright", 1}, /* right to access commercial resources */
  287.   {"caller", 1}, /* caller session */
  288.   {"check", 1}, /* for exam check use */
  289.   {"class", 1},
  290.   {"class_examlog", 1},
  291.   {"class_exolog", 1},
  292.   {"class_limit", 1},
  293.   {"class_quota", 1},
  294.   {"class_regpass", 1},
  295.   {"class_user_limit", 1},
  296.   {"classdir", 1},
  297.   {"classname", 1},
  298.   {"devel_modules", 1},
  299.   {"developer", 1},
  300.   {"doc_quota", 1},
  301.   {"doc_regpass", 1},
  302.   {"email", 1},
  303.   {"exo", 0}, /* exercise number */
  304.   {"exoption", 1}, /* exercise option */
  305.   {"exotrymax", 0},
  306.   {"firstname", 1},
  307.   {"forum_limit", 1},
  308.   {"home", 1},
  309.   {"institutionname", 1},
  310.   {"isexam", 0}, /* whether the sheet is an exam sheet */
  311.   {"ismanager", 0},
  312.   {"lastname", 1},
  313.   {"mode", 0}, /* operating mode */
  314.   {"module_start_time", 0},
  315.   {"now", 1}, /* date and time, yyyymmdd.hh:mm:ss */
  316.   {"nowseconds", 1}, /* date and time, seconds since EPOCH */
  317.   {"nr", 1}, /* non-readable variables in user file, words */
  318.   {"nw", 1}, /* non-writable variables in user file, words */
  319.   {"otherclass", 1}, /* Remember other logins */
  320.   {"participate", 1}, /* superclass definition */
  321.   {"prefix", 1}, /* user file prefix */
  322.   {"protocol", 0}, /* http protocol */
  323.   {"rafale", 0}, /* rapidfire request information */
  324.   {"readable", 1}, /* readable variables in user file, words */
  325.   {"realuser", 1}, /* real user for supervisor in gateway */
  326.   {"req_time", 0}, /* time of the request */
  327.   {"sclassdir", 1},
  328.   {"scorereg", 0}, /* score registration flag */
  329.   {"seed", 0},
  330.   {"seed_repeat",0},
  331.   {"seed_score", 0},
  332.   {"seedcnt",0},
  333.   {"seedlastcnt",0},
  334.   {"sequence", 0}, /* sequence number */
  335.   {"sescookie", 1}, /* session cookie */
  336.   {"sesdir", 1},
  337.   {"session_serial", 0}, /* request serial in the session */
  338.   {"session_start_time", 0},
  339.   {"sheet", 0}, /* sheet number */
  340.   {"sup_secure", 1}, /* secure level of supervisor */
  341.   {"superclass", 1}, /* superclass code */
  342.   {"superclass_quota", 1},
  343.   {"supertype", 1}, /* superclass type */
  344.   {"supervise", 1}, /* superclass definition */
  345.   {"supervisor", 1}, /* real name of the supervisor */
  346.   {"supervisormail",1}, /* email of supervisor */
  347.   {"trustfile", 1}, /* trusted files in special adm modules */
  348.   {"useropts", 1}, /* user options */
  349.   {"writable", 1}, /* writable variables in user file, words */
  350. };
  351. int INTERNAL_NAME_NO=(sizeof(internal_name)/sizeof(internal_name[0]));
  352.  
  353. char *httpd_vars[]={
  354.   "HTTP_ACCEPT",
  355.   "HTTP_ACCEPT_CHARSET",
  356.   "HTTP_ACCEPT_LANGUAGE",
  357.   "HTTP_COOKIE",
  358.   "HTTP_HOST",
  359.   "HTTP_USER_AGENT",
  360.   "HTTP_X_REQUESTED_WITH",
  361.   "HTTPS",
  362.   "QUERY_STRING",
  363.   "REMOTE_HOST",
  364.   "REMOTE_ADDR",
  365.   "REMOTE_PORT",
  366.   "REQUEST_METHOD",
  367.   "SCRIPT_NAME",
  368.   "SERVER_NAME",
  369.   "SERVER_SOFTWARE",
  370.   "SERVER_PROTOCOL"
  371. };
  372. #define HTTPD_VAR_NO (sizeof(httpd_vars)/sizeof(httpd_vars[0]))
  373.  
  374. /* security: these variables will not be visible to child processes */
  375. char *unsetvars[]={
  376.   "DOCUMENT_ROOT","SERVER_SIGNATURE","SERVER_SOFTWARE",
  377.       "UNIQUE_ID","HTTP_KEEP_ALIVE","SSL_SESSION_ID"
  378. };
  379. #define unsetvarcnt (sizeof(unsetvars)/sizeof(unsetvars[0]))
  380.  
  381. int httpd_type=httpd_apache;
  382.  
  383. char *remote_addr=""; /* storing for performance */
  384. char *remote_host="";
  385.  
  386. char ref_name[2048], ref_base[2048];
  387.  
  388. void put_special_page(char *pname);
  389. void useropts(void);
  390.  
  391. /* Make certain httpd variables readable by modules */
  392. void take_httpd_vars(void)
  393. {
  394.   int i;
  395.   char *p, buf[MAX_NAMELEN+1];
  396.   var_noexport=1;
  397.   for(i=0;i<HTTPD_VAR_NO;i++) {
  398.    snprintf(buf,sizeof(buf),"httpd_%s",httpd_vars[i]);
  399.    if((p=getenv(httpd_vars[i]))!=NULL) setvar(buf,p);
  400.   }
  401.   var_noexport=0;
  402.  
  403.   for(i=0;i<unsetvarcnt;i++) unsetenv(unsetvars[i]);
  404.    /* IPv4 IPv6*/
  405.   p=getenv("REMOTE_ADDR");if(p!=NULL && (strcmp(p,"127.0.0.1")==0 || strcmp(p,"::1")==0)) human_access=1;
  406.   p=getenv("HTTP_REFERER"); if(p!=NULL && *p!=0) setvar("wims_referer",p);
  407. }
  408.  
  409. /* cookie2session */
  410. void cookie2session(void)
  411. {
  412.   char cksession[64], psession[32], *ckey, *p;
  413.   char nbuf[MAX_FNAME+1];
  414.  
  415.   if(mode==mode_popup) return;
  416.   if(cookiegot[0]==0) {
  417.    ckset: cookiegot[0]=0; setcookie=1; return;
  418.   }
  419.   p=getvar("special_parm");
  420.   if(p!=NULL && strcmp(p,"ignorecookie")==0) return;
  421.   mystrncpy(cksession,cookiegot,sizeof(cksession));
  422.   ckey=strchr(cksession,'-');
  423.   if(ckey==NULL) goto ckset; else *ckey++=0;
  424.   p=getvar("wims_session"); if(p==NULL) p="";
  425.   if(strstr(p,"new")!=NULL) goto ckset;
  426.   mystrncpy(psession,p,sizeof(psession));
  427.   p=strchr(psession,'_'); if(p!=NULL) *p=0;
  428.   if(psession[0]!=0) {
  429.     if(strcmp(psession,cksession)==0) return;
  430.     if(session_exists(psession)) goto ckset;
  431.     if(session_exists(cksession)) goto change;
  432.   }
  433.   else {
  434.     if(!session_exists(cksession)) return;
  435.     change:
  436.     p=getenv("HTTPS");
  437.     if(p!=NULL && strcasecmp(p,"on")==0) goto ckset;
  438.     mkfname(nbuf,"%s/%s/var",session_dir,cksession);
  439.     getdef(nbuf,"w_wims_ismanager",tmplbuf);
  440.     if(tmplbuf[0]!=0 && tmplbuf[0]!='0') goto ckset;
  441.     getdef(nbuf,"w_wims_protocol",tmplbuf);
  442.     if(strcasecmp(tmplbuf,"https")==0) goto ckset;
  443.     mkfname(nbuf,"%s/%s/var.stat",session_dir,cksession);
  444.     getdef(nbuf,"wims_user",tmplbuf);
  445.     if(tmplbuf[0]!=0) goto ckset;
  446.     force_setvar(ro_name[ro_session],cksession);
  447.     setsesdir(cksession);
  448.     force_setvar("wims_subsession","");
  449.     session_serial=0;
  450.   }
  451. }
  452.  
  453. void determine_font(char *l)
  454. {
  455.   int i;
  456.  
  457.   if(l==NULL || *l==0) return;
  458.   for(i=0;i<charname_no && memcmp(charname[i].name,l,2);i++);
  459.   if(i<charname_no) setvar("wims_main_font",charname[i].font);
  460. }
  461.  
  462. void determine_dirn(char *l)
  463. {
  464.   int i;
  465.  
  466.   if(l==NULL || *l==0) return;
  467.   for(i=0;i<dirnname_no && memcmp(dirnname[i].name,l,2);i++);
  468.   if(i<dirnname_no) setvar("wims_main_dirn",dirnname[i].dirn);
  469. }
  470.  
  471. void predetermine_language(void)
  472. {
  473.   char *p;
  474.   int i,n;
  475.  
  476.   if(pre_language[0]!=0) p=pre_language;
  477.   else p=getenv("HTTP_ACCEPT_LANGUAGE");
  478.   if(p!=NULL && strlen(p)>=2) {
  479.     for(i=0;i<available_lang_no && memcmp(p,available_lang[i],2)!=0;i++);
  480.     if(i<available_lang_no) goto lend;
  481.   }
  482.   p=getenv("HTTP_USER_AGENT");
  483.   if(p!=NULL && strlen(p)>=5) {
  484.     char *q;
  485.     if((q=strchr(p,'['))!=NULL && islower(*(q+1)) && islower(*(q+2)) && *(q+3)==']') {
  486.         char bb[4];
  487.         bb[0]=*(q+1);bb[1]=*(q+2);bb[2]=0;
  488.         for(i=0;i<available_lang_no && memcmp(bb,available_lang[i],2)!=0;i++);
  489.         if(i<available_lang_no) {
  490.           memmove(lang,bb,2); lang[2]=0;
  491.           goto lend2;
  492.         }
  493.     }
  494.   }
  495.   p=getenv("HTTP_HOST"); if(p==NULL) goto lend2;
  496.   n=strlen(p); if(n<=3 || *(p+n-3)!='.') goto lend2;
  497.   p=p+n-2;
  498.   for(i=0;i<available_lang_no && memcmp(p,available_lang[i],2)!=0;i++);
  499.   if(i<available_lang_no) {
  500.     lend: memmove(lang,p,2); lang[2]=0;
  501.     lend2: determine_font(lang);determine_dirn(lang);
  502.   }
  503. }
  504.  
  505. /* print a special page */
  506. void put_special_page(char *pname)
  507. {
  508.   determine_font(lang);
  509.   determine_dirn(lang);
  510.   phtml_put_base(mkfname(NULL,"%s.phtml.%s",pname,lang),0);
  511.   write_logs();free(var_str);
  512. }
  513.  
  514. /* check whether the connection is a site manager. */
  515. void manager_check(void)
  516. {
  517.   char *p, *pp, buf[16];
  518.   struct stat confstat;
  519.   int i;
  520.  
  521.   manageable=0;
  522.   if(robot_access || *manager_site==0 || checkhost(manager_site)<1)
  523.     goto mend;
  524.   if(manager_https) {
  525.     p=getenv("HTTPS");
  526.     if(p==NULL || strcmp(p,"on")!=0) goto mend;
  527.   }
  528. /* IPv4 IPv6*/
  529.   if(strcmp(remote_addr,"127.0.0.1")==0 || strcmp(remote_addr,"::1")==0) {
  530.     int port, port2;
  531.     char tester[128];
  532.     p=getenv("REMOTE_PORT"); if(p==NULL) goto mend;
  533.     port=atoi(p); if(port<1024 || port>65535) goto mend;
  534.     p=getenv("SERVER_PORT"); if(p==NULL) goto mend;
  535.     port2=atoi(p); if(port2>=10000 || port2<=0) goto mend;
  536. /* this is very non-portable */
  537.     manageable=1;
  538.     accessfile(tmplbuf,"r","/proc/net/tcp");
  539.     snprintf(tester,sizeof(tester)," 0100007F:%04X 0100007F:%04X ",
  540.            port,port2);
  541.     p=strstr(tmplbuf,tester);
  542.     if(p!=NULL) {
  543.       pp=strchr(p,'\n'); if(pp!=NULL) *pp=0;
  544.       if(strlen(p)>=75) {
  545.         p=find_word_start(p+70); *find_word_end(p)=0;
  546.         if(atoi(p)==geteuid()) manageable=2;
  547.       }
  548.     }
  549.   }
  550.   else manageable=1;
  551.   i=stat(config_file,&confstat);
  552.   if(i==0 && manageable>0 && (confstat.st_mode&(S_IRWXO|S_IRWXG))!=0) manageable=-1;
  553.   if(manageable>0 && !trusted_module()) manageable=0;
  554.   if(manageable==1) {
  555.     accessfile(tmplbuf,"r","%s/.manager",session_prefix);
  556.     if(strstr(tmplbuf,"yes")!=NULL) manageable=2;
  557.   }
  558.   if(manageable==1) {
  559.     p=getvar(ro_name[ro_module]);
  560.     if(p!=NULL && strncmp(p,"adm/manage",strlen("adm/manage"))==0) {
  561.       struct stat pstat;
  562.       if(stat("../log/.wimspass",&pstat)==0) {
  563.         if((S_IFMT&pstat.st_mode)!=S_IFREG ||
  564.            ((S_IRWXO|S_IRWXG)&pstat.st_mode)!=0)
  565.           manageable=-2;
  566.       }
  567.     }
  568.   }
  569.   mend:
  570.   mystrncpy(buf,int2str(manageable),sizeof(buf));
  571.   force_setvar("wims_ismanager",buf);
  572.   if(manageable>=2) {
  573.     struct rlimit rlim;
  574.     rlimit_cpu*=10;
  575.     rlim.rlim_cur=rlim.rlim_max=rlimit_cpu;
  576.     setrlimit(RLIMIT_CPU,&rlim);
  577.     mystrncpy(buf,int2str(rlimit_cpu),sizeof(buf));
  578.     setvar("wims_cpu_limit",buf);
  579.     initalarm();
  580.   }
  581. }
  582.  
  583. /* check for robot access */
  584. void robot_check(void)
  585. {
  586.   char *ua, *p, *ses, *c, *mod;
  587.   int i;
  588.  
  589.   if(human_access) return;
  590.   mod=getvar(ro_name[ro_module]);
  591.   if(mod!=NULL && strcmp(mod,"adm/raw")==0) return;
  592.   ses=getvar(ro_name[ro_session]);
  593. /* user has valid session; OK */
  594.   if(ses!=NULL && strncmp(ses,robot_session,strlen(robot_session))!=0
  595.      && strchr(ses,'/')==NULL
  596.      && ftest(mkfname(NULL,"%s/%s",s2_dir,ses))==is_dir)
  597.     return;
  598.   ua=getenv("HTTP_USER_AGENT"); if(ua==NULL) ua="";
  599.   ua=find_word_start(ua);
  600.   if(strncasecmp(ua,"Mozilla",strlen("Mozilla"))==0 &&
  601.      (p=strstr(ua,"compatible"))!=NULL)
  602.     ua=find_word_start(find_word_end(p));
  603.   if(*ua) {
  604.     for(i=0;i<good_agent_no
  605.         && strncasecmp(ua,good_agent[i],strlen(good_agent[i]));i++);
  606.     if(i<good_agent_no) return;
  607.     for(i=0;i<bad_agent_no
  608.         && strstr(ua,bad_agent[i])==NULL;i++);
  609.     if(i<bad_agent_no) user_error("trapped");
  610.   }
  611.   force_setvar(ro_name[ro_session],robot_session);
  612.   setsesdir(robot_session);
  613.   c=getvar(ro_name[ro_cmd]);
  614.   robot_access=1;
  615.   if(c!=NULL && strcmp(c,"new") && strcmp(c,"intro")) {
  616.     force_setvar(ro_name[ro_cmd],"robot_error");
  617.     nph_header(450); put_special_page("robot");
  618.     flushoutput(); flushlog(); exit(0);
  619.   }
  620. }
  621.  
  622. /* type=0: ordinary; type=1: multipart/form-data */
  623. void parse_query_string(int len, int type)
  624. {
  625.   int i,j,l,v,cmd_defined;
  626.   int parenth=-1, ll, lb, dlen;
  627.   char *start, *p, *p1, *pt, *b1="";
  628.  
  629.   cmd_defined=0;
  630.   setvar("wims_subsession","");
  631.   ll=lb=0;
  632.   if(type) {
  633.     ll=strlen(mpboundary);
  634.     start=strstr(var_str,mpboundary);
  635.     if(start==NULL) start=var_str+strlen(var_str);
  636.     if(strstr(var_str,"\r\n\r\n")!=NULL) b1="\r\n\r\n";
  637.     else b1="\n\n";
  638.     lb=strlen(b1);
  639.   }
  640.   else start=var_str;
  641.   for(v=0, p1=start;p1<var_str+len;p1+=l) {
  642.     if(type) {
  643.       char *p2, *p3, *p4, *p5;
  644.       p2=p1+ll; p3=memstr(p2,mpboundary,var_str+len-p2); l=p3-p1;
  645.       p=memstr(p2,b1,var_str+len-p2); if(p>=p3) continue;
  646.       p+=lb;
  647.       if(p3<var_str+len) {
  648.         while(*p3!='\n' && p3>p2) p3--;
  649.         *p3=0;
  650.         p3--; if(*p3=='\r') *p3=0;
  651.       }
  652.       dlen=p3-p;
  653.       p2=memstr(p2,"name=",p3-p2); if(p2>=p3) continue;
  654.       p2+=strlen("name="); if(*p2=='"') p2++;
  655.       for(p3=p2; myisalnum(*p3) || strchr("._",*p3)!=NULL; p3++);
  656.       if(p3==p2) continue;
  657.         if(p3-p2==strlen("wims_deposit") &&
  658.            strncmp(p2,"wims_deposit",p3-p2)==0) {
  659.           p4=memstr(p1,"filename=",p-p1); if(p4<p) {
  660.             p4+=strlen("filename="); if(*p4=='"') {
  661.               p4++; p5=strchr(p4,'"');
  662.               if(p5==NULL || p5-p4>=MAX_FNAME) goto emptyquote;
  663.             }
  664.             else {
  665.               emptyquote:
  666.               for(p5=p4; p5<p && !isspace(*p5) &&
  667.                   strchr(";\"~#*?=,'",*p5)==NULL; p5++);
  668.             }
  669.             if(p5>p4) {
  670.               *p5=0;
  671.               for(p5--;
  672.                   p5>=p4 && !isspace(*p5) && strchr("/\\:",*p5)==NULL;
  673.                   p5--);
  674.               if(p5>=p4) p4=p5+1;
  675.               if(*p4==0) goto noname;
  676.               if(strstr(p4,"..")!=NULL || *p4=='.')
  677.                 p4="noname.file";
  678.               setvar("wims_deposit",p4);
  679.             }
  680.             else {
  681.               noname: setvar("wims_deposit","noname.file");
  682.             }
  683.           }
  684.           deplen=dlen;
  685.         }
  686.         *p3=0; l-=p2-p1; p1=p2;
  687.     }
  688.     else {
  689.       p1=find_word_start(p1);
  690.       l=strlen(p1)+1; p=strchr(p1,'=');
  691.       if(p==NULL) p=p1+strlen(p1);
  692.       if(*p==0 && l>1) {
  693.         user_variable[v].name="no_name";
  694.         user_variable[v].value=p1;
  695.         coord_input=1;
  696.         goto nnext;
  697.       }
  698.       *p++=0;
  699.     }
  700. /* empty name or empty value: ignore */
  701.     if(*p1==0 || *p==0) continue;
  702. /* We do not treat names containing '.' */
  703.     for(pt=strchr(p1,'.'); pt; pt=strchr(++pt,'.')) *pt='_';
  704. /* Restrictions on variable names */
  705.     for(pt=p1; myisalnum(*pt) || *pt=='_'; pt++);
  706.     if(*pt) continue;
  707.     if(strcmp(p1,"wims_deposit")!=0) _tolinux(p);
  708. /* This is a restriction:
  709.  * Every parameter must have matching parentheses.
  710.  */
  711.     if(parenth==-1 && strncmp(p1,"freepar_",strlen("freepar_"))!=0
  712.          && strcmp(p1,"wims_deposit")!=0
  713.          && check_parentheses(p,1)) parenth=v;
  714.     if(strcmp(p1,"special_parm")==0 && strcmp(p,"wims")==0)
  715.         human_access=1;
  716.     j=search_list(ro_name,RO_NAME_NO,sizeof(ro_name[0]),p1);
  717.     if(j>=0) {
  718.       if(j==ro_session) {
  719.         p=find_word_start(p); *find_word_end(p)=0;
  720.         if(strlen(p)>MAX_SESSIONLEN) continue;
  721.         if(strcmp(p,robot_session)==0) p="";
  722.         if(strcasecmp(p,"popup")==0) {
  723.           mode=mode_popup;
  724.           force_setvar("wims_mode","popup");
  725.           force_setvar("session","");
  726.           continue;
  727.         }
  728.       }
  729.       if(j==ro_module) module_defined=1;
  730.       if(j==ro_cmd) {
  731.         p=find_word_start(p); *find_word_end(p)=0;
  732.         if(strlen(p)>16) continue;
  733.         cmd_defined=1;
  734.       }
  735.       if(j==ro_lang) {
  736.         if(strlen(p)!=2) continue;
  737.         for(i=0;i<available_lang_no && strcmp(available_lang[i],p)!=0;i++);
  738.         if(i<available_lang_no) {user_lang=1; ovlstrcpy(lang,p);}
  739.         else continue;
  740.       }
  741. /* strip leading and trailing '/'s in module name */
  742.       if(j==ro_module) {
  743.         p=find_word_start(p); *find_word_end(p)=0;
  744.         while(*p=='/') p++;
  745.         while(*p!=0 && *(p+strlen(p)-1)=='/') *(p+strlen(p)-1)=0;
  746.         if(strlen(p)>MAX_MODULELEN) continue;
  747.       }
  748.       setvar(p1,p);
  749.       if(j==ro_session && mode!=mode_popup) {
  750.         char *pp, *pr;
  751.         char buf[1024];
  752.         mystrncpy(buf,p,sizeof(buf));
  753.         if((pp=strchr(buf,'.'))!=NULL) {
  754.           *pp++=0; session_serial=atoi(pp);
  755.           if(pp<0) pp=0;
  756.         }
  757.         else session_serial=0;
  758.         pp=strchr(buf,'_');
  759.         if(pp!=NULL && (pr=strstr(pp,"_mhelp"))!=NULL) {
  760.           *pr=0; ismhelp=1; lastout_file=-1;
  761.           setvar("wims_inssub","mh");
  762.         }
  763.         force_setvar("wims_session",buf);
  764.         if(pp!=NULL) force_setvar("wims_subsession",pp);
  765.       }
  766.       continue;
  767.     }
  768.     user_variable[v].name=p1;
  769.     user_variable[v].value=p;
  770. nnext:v++; if(v>=MAX_VAR_NUM) user_error("too_many_variables");
  771.   }
  772.   user_var_no=v;
  773.   if(parenth>=0) {
  774.     char buf[16];
  775.     mystrncpy(buf,int2str(user_var_no),sizeof(buf));
  776.     setvar("user_var_no",buf);
  777.     for(i=0;i<user_var_no;i++) {
  778.       snprintf(buf,sizeof(buf),"name%d",i);
  779.       setvar(buf,user_variable[i].name);
  780.       snprintf(buf,sizeof(buf),"value%d",i);
  781.       setvar(buf,user_variable[i].value);
  782.     }
  783.     mystrncpy(buf,int2str(parenth),sizeof(buf));
  784.     setvar("bad_parentheses",buf);
  785.     user_error("unmatched_parentheses");
  786.   }
  787.   p=getenv("SCRIPT_NAME");
  788.   if(p!=NULL && (p=strstr(p,"/getfile/"))!=NULL) {
  789.     p+=strlen("/getfile/");
  790.     force_setvar(ro_name[ro_cmd],commands[cmd_getfile]);
  791.     force_setvar("special_parm",p);
  792.     cmd_defined=1;
  793.   }
  794.   if(module_defined && !cmd_defined) setvar(ro_name[ro_cmd],commands[cmd_intro]);
  795.   robot_check(); cookie2session();
  796. }
  797.  
  798. /* parse special commands */
  799. void special_cmds(void)
  800. {
  801.   char *c, *p;
  802.   int i;
  803.   long int l=-1;
  804.  
  805.   c=getvar(ro_name[ro_cmd]);
  806.   if(c==NULL || *c==0) {  /* no module name nor command */
  807.     setvar(ro_name[ro_module],home_module);
  808.     setvar(ro_name[ro_cmd],commands[cmd_new]);
  809.     return;
  810.   }
  811.   for(i=0;i<CMD_NO && strcmp(commands[i],c)!=0; i++);
  812.   switch(i) {
  813.     case cmd_intro: {
  814.       set_module_prefix();
  815.       default_form_method="get";
  816.       if(ftest(mkfname(NULL,"%s/%s",module_prefix,intro_file))<0) {
  817.         force_setvar(ro_name[ro_cmd],commands[cmd_new]);
  818.         return;
  819.       }
  820.       p=getvar("wims_session");
  821.       if(p!=NULL && *p!=0) {
  822.         if(set_session_prefix()==0) check_session();
  823.         else {
  824.           trap_check(p);
  825.           if(strchr(p,'_')!=NULL && strchr(p,'/')==NULL) {
  826.             get_static_session_var();
  827.           }
  828.         }
  829.       }
  830. /* determine http protocol name. How to detect? */
  831.       p=getenv("HTTPS");
  832.       if(p!=NULL && strcmp(p,"on")==0) {
  833.         protocol="https"; set_protocol();
  834.       }
  835.       force_setvar("wims_protocol",protocol);
  836.       determine_font(lang);
  837.       determine_dirn(lang);
  838.       main_phtml_put(intro_file); debug_output();
  839.       introend: write_logs();free(var_str);
  840.       delete_pid(); exit(0);
  841.     }
  842.     case cmd_ref: {
  843.       set_module_prefix();
  844.       default_form_method="get";
  845.       p=getvar("wims_session");
  846.       if(p!=NULL && *p!=0) {
  847.         if(set_session_prefix()==0) check_session();
  848.         else trap_check(p);
  849.       }
  850.       determine_font(lang);
  851.       determine_dirn(lang);
  852.       main_phtml_put(ref_file); goto introend;
  853.     }
  854.     case cmd_getins: {
  855.       c=getvar(ro_name[ro_special_parm]);
  856.       if(c==NULL || *c==0) {
  857.         user_error_nolog=1; user_error("no_insnum");
  858.       }
  859.       if(*c=='/' || strstr(c,"..")!=NULL) goto badins;
  860.       set_session_prefix();
  861.       if(strstr(session_prefix,"robot")!=NULL) exit(0);
  862.       l=filelength("%s/%s",s2_prefix,c);
  863.       if(l<0) {
  864.         badins: user_error_nolog=1; user_error("bad_insnum");
  865.       }
  866.       {
  867.         char *fmt;
  868.         fmt=strchr(c,'.');
  869.         if(fmt==NULL) {
  870.             user_error_nolog=1; user_error("bad_insnum");
  871.         }
  872.         else fmt++;
  873.  
  874.         nph_header(200);
  875. /* insert format problem; bricolage */
  876.         printf("Content-type: image/%s\r\n\
  877. Content-length: %ld\r\n\r\n",fmt,l);
  878.         catfile(stdout,"%s/%s",s2_prefix,c); exit(0);
  879.       }
  880.     }
  881.     case cmd_getfile: {
  882.       char fname[MAX_FNAME+1];
  883.       c=getvar(ro_name[ro_special_parm]);
  884.       if(c==NULL || *c==0) {
  885.         user_error_nolog=1; user_error("no_insnum");
  886.       }
  887.       if(*c=='/' || strstr(c,"..")!=NULL) goto badfile;
  888.  
  889.       set_session_prefix();
  890.       if(strstr(session_prefix,"robot")!=NULL) exit(0);
  891.       mkfname(fname,"%s/getfile/%s",session_prefix,c);
  892.       l=filelength("%s",fname);
  893.       if(l<0 && strchr(session_prefix,'_')!=NULL) {
  894.         char *pt;
  895.         mystrncpy(fname,session_prefix,sizeof(fname));
  896.         pt=strrchr(fname,'_'); if(pt) *pt=0;
  897.         snprintf(fname+(pt-fname),sizeof(fname)-(pt-fname),
  898.               "/getfile/%s",c);
  899.         l=filelength("%s",fname);
  900.       }
  901.       if(l<0) {
  902.         badfile: user_error_nolog=1; user_error("bad_insnum");
  903.       }
  904.       if(l>512*1024) {
  905.         struct rlimit rlim;
  906.         rlimit_cpu*=l/(10*1024);
  907.         rlim.rlim_cur=rlim.rlim_max=rlimit_cpu;
  908.           initalarm();
  909.       }
  910.       {
  911.         char *p1;
  912.         char mime[MAX_LINELEN+1];
  913.         for(p1=c+strlen(c);p1>c && isalpha(*(p1-1)); p1--);
  914.         ovlstrcpy(mime,"application/octet-stream");
  915.         if(p1>c && *(p1-1)=='.') {
  916.           setvar("translator_unknown",mime);
  917.           setvar("dictionary","bases/sys/mime");
  918.           snprintf(mime,sizeof(mime),"translator %s",p1);
  919.           calc_exec(mime);
  920.         }
  921.         nph_header(200);
  922.         printf("Content-type: %s\r\n\
  923. Content-length: %ld\r\n\r\n",mime,l);
  924.         catfile(stdout,"%s",fname); exit(0);
  925.       }
  926.     }
  927.     case cmd_close: {
  928.       char *p, b2[32]; int w;
  929.       char nbuf[MAX_FNAME+1], vbuf[MAX_LINELEN+1];
  930.       p=getvar(ro_name[ro_session]);
  931.       if(p==NULL || strlen(p)<10 ||
  932.          strchr(p,'/')!=NULL) return;
  933.       mystrncpy(b2,p,sizeof(b2));
  934.       p=strchr(b2,'.'); if(p!=NULL) *p=0;
  935.       mkfname(nbuf,"%s/%s/var.stat",session_dir,b2);
  936.       getdef(nbuf,"wims_caller",vbuf);
  937.       if(vbuf[0]!=0) force_setvar(ro_name[ro_session],vbuf);
  938.       w=wrapexec; wrapexec=1;
  939.       call_sh("rm -Rf %s/%s* %s/%s* >/dev/null 2>&1",session_dir,b2,s2_dir,b2);
  940.       wrapexec=w; cookiegot[0]=0;
  941.       force_setvar(ro_name[ro_cmd],"new");
  942.     }
  943.     default: return;
  944.   }
  945. }
  946.  
  947. /* This is run only when manually invoking the program.
  948.  * Verifies the orderedness of various list tables.
  949.  */
  950. int verify_tables(void)
  951. {
  952.     if(verify_order(calc_routine,CALC_FN_NO,sizeof(calc_routine[0]))) return -1;
  953.     if(verify_order(exec_routine,EXEC_FN_NO,sizeof(exec_routine[0]))) return -1;
  954.     if(verify_order(main_config,MAIN_CONFIG_NO,sizeof(main_config[0]))) return -1;
  955.     if(verify_order(mathname,mathname_no,sizeof(mathname[0]))) return -1;
  956.     if(verify_order(hmname,hmname_no,sizeof(hmname[0]))) return -1;
  957.     if(verify_order(ro_name,RO_NAME_NO,sizeof(ro_name[0]))) return -1;
  958.     if(verify_order(distr_cmd,distr_cmd_no,sizeof(distr_cmd[0]))) return -1;
  959.     if(verify_order(internal_name,INTERNAL_NAME_NO,
  960.                 sizeof(internal_name[0]))) return -1;
  961.     if(verify_order(tmathfn,tmathfn_no,sizeof(tmathfn[0]))) return -1;
  962.     if(verify_order(tmathvar,tmathvar_no,sizeof(tmathvar[0]))) return -1;
  963.     if(verify_order(modindex,MODINDEX_NO,sizeof(modindex[0]))) return -1;
  964.     if(verify_order(exportvars,exportvarcnt,sizeof(exportvars[0]))) return -1;
  965.     if(evaltab_verify()) return -1;
  966.     if(textab_verify()) return -1;
  967.     return 0;
  968. }
  969.  
  970. void config_defaults(void)
  971. {
  972.     int i;
  973.     for(i=0;i<MAIN_CONFIG_NO;i++) {
  974.       if((1&main_config[i].is_integer)==1) {
  975.           int *pi = (int*)main_config[i].address;
  976.           printf("DF_%s=%d\n",main_config[i].name, *pi);
  977.         }
  978.       else {
  979.             char **ps = (char**)main_config[i].address;
  980.           printf("DF_%s=%s\n",main_config[i].name,*ps);
  981.         }
  982.     }
  983. }
  984.  
  985. /* get and set useroptions */
  986. void useropts(void)
  987. {
  988.     char *p;
  989.     setvar("lang",lang);
  990.     p=getvar("useropts");
  991.     if(p==NULL || *p==0) p=getvar("wims_useropts");
  992.     if(p!=NULL && *p!=0) {
  993.       if(myisdigit(p[0])) {
  994.         usertexsize=p[0]-'0';
  995.         /* fourth digit is for special fonts*/
  996.         if(p[1]!=0) { mathalign_base=p[1]-'0'; }
  997.       }
  998.       if(myisdigit(p[3]) && p[3]!=0){ spec_font=p[3]-'0';}
  999.     }
  1000.     if(mathalign_base==1) {
  1001.         mathalign_sup1="<sup>"; mathalign_sup2="</sup>";
  1002.     } else mathalign_sup1=mathalign_sup2="";
  1003. }
  1004.  
  1005. /* popup module help */
  1006. void mhelp(void)
  1007. {
  1008.     char *p, buf[MAX_LINELEN+1];
  1009.     main_phtml_put(""); buf[0]=0;
  1010.     if(cmd_type!=cmd_help) {
  1011.       phtml_put_base("closemhelp.phtml",0);
  1012.     }
  1013.     else {
  1014.       phtml_put_base("mhelpheader.phtml",0);
  1015.       p=getvar("special_parm");
  1016.       if(p!=NULL && strcmp(p,"about")==0)
  1017.         phtml_put("about.phtml",0);
  1018.       else phtml_put("help.phtml",0);
  1019.       phtml_put_base("mhelptail.phtml",0);
  1020.       exec_tail(buf);
  1021.     }
  1022. }
  1023.  
  1024. #define READSTDIN_WINDOW 4096
  1025.  
  1026. void readstdin(int len)
  1027. {
  1028.     int ll, l1, lt, lr;
  1029.     int cpulim;
  1030.  
  1031.     cpulim=rlimit_cpu; rlimit_cpu=3;
  1032.     lr=len; l1=0;
  1033.     while(lr>0) {
  1034.       nowtime=time(0); initalarm();
  1035.       ll=lr; if(ll>READSTDIN_WINDOW) ll=READSTDIN_WINDOW;
  1036.       lt=fread(stdinbuf+l1,1,ll,stdin);
  1037.       if(lt!=ll) user_error("parm_too_long");
  1038.       lr-=ll; l1+=ll;
  1039.     }
  1040.     if(l1!=len) user_error("parm_too_long");
  1041.     stdinbuf[len]=0; rlimit_cpu=cpulim;
  1042. }
  1043.  
  1044. /* input: p=QUERY_STRING. output: parameter length. */
  1045. /* Netscape puts form content into /tmp. */
  1046. int formdata(char *p)
  1047. {
  1048.     char *pp;
  1049.     int inlen;
  1050.     char *ctype;
  1051.     inlen=0; ctype=getenv("CONTENT_TYPE");
  1052.     if(ctype==NULL || strstr(ctype,"multipart/form-data")==NULL
  1053.        || (p=strstr(ctype,"boundary="))==NULL) {
  1054.       bad: stdinbuf=""; return 0;
  1055.     }
  1056.     pp=getenv("CONTENT_LENGTH");
  1057.     if(pp==NULL) goto bad;
  1058.     inlen=atoi(pp); if(inlen<=10) goto bad;
  1059.     if(inlen>=MAX_DEPOSITLEN) user_error("parm_too_long");
  1060.     stdinbuf=xmalloc(inlen+1); readstdin(inlen);
  1061.     p+=strlen("boundary=");
  1062.     for(pp=p;myisalnum(*pp) || *pp=='-'; pp++);
  1063.     if(pp-p<sizeof(mpboundary)-2) {
  1064.       memmove(mpboundary,p,pp-p); mpboundary[pp-p]=0;
  1065.     }
  1066. /* empty data */
  1067.     if(strstr(stdinbuf,mpboundary)==NULL || strstr(stdinbuf,"name=")==NULL) {
  1068.       free(stdinbuf); goto bad;
  1069.     }
  1070.     form_access=1; post_log();
  1071.     return inlen;
  1072. }
  1073.  
  1074. /* get the content of POST */
  1075. void getpost(void)
  1076. {
  1077.     int ll;
  1078.     char *pp;
  1079.     pp=getenv("CONTENT_LENGTH");
  1080.     if(pp==NULL || (ll=atoi(pp))<=0) {
  1081.       stdinbuf=xmalloc(16); stdinbuf[0]=0;
  1082.     }
  1083.     else {
  1084.       if(ll>QUERY_STRING_LIMIT) user_error("parm_too_long");
  1085.       stdinbuf=xmalloc(ll+16); readstdin(ll);
  1086.       if(ll>0) {
  1087.           setenv("QUERY_STRING",stdinbuf,1);
  1088.           form_access=1; post_log();
  1089.       }
  1090.     }
  1091. }
  1092.  
  1093. void buffer_init(void)
  1094. {
  1095.     struct timeval tv;
  1096.  
  1097.     mcachecnt=readnest=0;
  1098.     mpboundary[0]=cookiegot[0]=cookieset[0]=cwdbuf[0]=0;
  1099.     rscore_class[0]=rscore_user[0]=multiexec_random[0]=0;
  1100.     lastftest[0]=0;
  1101.     lastdatafile[0]=0; lastdata=xmalloc(WORKFILE_LIMIT);
  1102.     outptr=outbuf;
  1103.     instex_src[0]=instex_fname[0]=module_prefix[0]=0;
  1104.     examlogf[0]=examlogd[0]=exam_sheetexo[0]=0;
  1105.     stdinbuf=NULL;
  1106.     mkfname(tmp_dir,"../tmp/forall");
  1107.     mkfname(session_dir,"../%s",SESSION_BASE);
  1108.     mkfname(s2_dir,"../%s",S2_BASE);
  1109.     if(gettimeofday(&tv,NULL)) startmtime=startmtime2=0;
  1110.     else {
  1111.       startmtime=((tv.tv_sec%10000)*1000+tv.tv_usec/1000);
  1112.       startmtime2=(tv.tv_sec%1000)*1000000+tv.tv_usec;
  1113.     }
  1114. }
  1115.  
  1116. /**
  1117.  * runs the test suite, to check whether the documented commands of modtool
  1118.  * behave properly.
  1119.  * @param prefix path to the proc file to process
  1120.  * @param p      name of the proc file to proceed
  1121.  * @param vars a list of var names to print.
  1122.  **/
  1123. void test_suite(char *prefix, char *p, char *vars){
  1124.   char *v, *nextv;
  1125.   mystrncpy(module_prefix, prefix, sizeof(module_prefix));
  1126.   exec_read(p);
  1127.   nextv=vars;
  1128.   while (*nextv!='\0'){
  1129.     v=find_word_start(nextv);
  1130.     nextv=find_word_end(v);
  1131.     if (*nextv != '\0'){
  1132.       *nextv++='\0';
  1133.     }
  1134.     v=getvar(v);
  1135.     if(v) puts(v); else putchar('\n');
  1136.   }
  1137. }
  1138.  
  1139. int main(int argc, char *argv[], char *envp[])
  1140. {
  1141. /******************************
  1142.  * modify a few rlimits for 64-bit processors
  1143.  **/
  1144.     int wordSize=32;
  1145. #ifdef __IA64__
  1146.     wordSize=64;
  1147. #endif
  1148. #ifdef __x86_64__
  1149.     wordSize=64;
  1150. #endif
  1151.     if (wordSize==64){
  1152.       rlimit_as*=2;    /* double virtual memory size */
  1153.       rlimit_data*=2;  /* double data segment size; maxima requires a lot */
  1154.       rlimit_stack*=2; /* double stack size */
  1155.     }
  1156. /****************************/
  1157.  
  1158.     char *p, homebuf[MAX_FNAME+1], lbuf[32], buf[64];
  1159.     int inlen=0;
  1160. /*    int mfd; */
  1161.  
  1162.     class_dir[0]=0;
  1163.     substitute=substit; buffer_init(); var_init();
  1164. /* WIMS internal locale is always C. */
  1165.     setenv("LANG","C",1); umask(022);
  1166.     setenv("LANGUAGE","us",1);
  1167.     setenv("LC_ALL","C",1);
  1168.     if(argc>1) {
  1169.       if(strcasecmp(argv[1],"table")==0) {
  1170.           if(verify_tables()) internal_error("Table disorder.");
  1171.           else printf("Table orders OK.\n");
  1172.           return 0;
  1173.       }
  1174.       if(strcasecmp(argv[1],"version")==0) {
  1175.           printf("%s",wims_version); return 0;
  1176.       }
  1177.       if(strcasecmp(argv[1],"defaults")==0) {
  1178.           config_defaults(); return 0;
  1179.       }
  1180.       if(strcasecmp(argv[1],"test")==0) {
  1181. /* launches a test suite */
  1182.         if (argc < 5) {
  1183.           printf("Not enough arguments to launch a test; usage:\n");
  1184.           printf("wims test path_to_file name_of_proc_file 'var1 var2 ...'\n\n");
  1185.           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");
  1186.           return 1;
  1187.         }
  1188.         test_suite(argv[2], argv[3], argv[4]);
  1189.         return 0;
  1190.       }
  1191.     }
  1192.     p=getenv("SERVER_SOFTWARE"); if(p!=NULL && strcasecmp(p,"WIMS")==0)
  1193.       httpd_type=httpd_wims;
  1194.     p=getenv("REMOTE_ADDR"); if(p!=NULL) remote_addr=p;
  1195.     p=getenv("REMOTE_HOST"); if(p!=NULL) remote_host=p;
  1196.     nowtime=time(0); now=localtime(&nowtime);
  1197. /* nowtime contains the seconds elapsed from EPOCH (1970)
  1198.    but tm_year is set to current year-1900.
  1199.  */
  1200.     memmove(&Now, now, sizeof(Now)); now=&Now;
  1201.     snprintf(nowstr,sizeof(nowstr),"%04d%02d%02d.%02d:%02d:%02d",
  1202.            (now->tm_year)+1900,(now->tm_mon)+1,now->tm_mday,
  1203.            now->tm_hour,now->tm_min,now->tm_sec);
  1204.     p=getenv("QUERY_STRING");
  1205.     if(p==NULL || *p==0) getpost();
  1206.     else if(strncmp(p,"form-data",9)==0) inlen=formdata(p);
  1207.  
  1208.     force_setvar("wims_now",nowstr);
  1209.     snprintf(lbuf,sizeof(lbuf),"%lu",nowtime);
  1210.     force_setvar("wims_nowseconds",lbuf);
  1211.     nowtime=time(0);
  1212.     initalarm();
  1213.  
  1214.     executed_gotos=insert_no=output_length=0; ins_alt[0]=0;
  1215.     setvar("empty","");       /* lock this variable */
  1216.     setvar("wims_version",wims_version);
  1217.     setvar("wims_version_date",wims_version_date);
  1218.     setvar("wims_main_font","utf-8");
  1219.     take_httpd_vars();
  1220.  
  1221.     main_configure();
  1222.     checklogd();
  1223. /* mfd=shm_open(SHM_NAME,O_RDONLY,-1);
  1224.  * if(mfd==-1) internal_error("Unable to find shared memory.");
  1225.  * shmptr=mmap(0,SHM_SIZE,PROT_READ,MAP_SHARED,mfd,0);
  1226.  * if(shmptr==MAP_FAILED) internal_error("Shared memory failure.");
  1227.  */
  1228.     getppid(); /* this is the first sysmask trigger, must be after checklogd() */
  1229.     predetermine_language();
  1230.     /* modify a few rlimits for 64-bit processors */
  1231.     if (sizeof(long) == 8) {
  1232.       rlimit_as*=2;    /* virtual memory size */
  1233.       rlimit_data*=2;  /* data segment size; maxima requires a lot */
  1234.       rlimit_stack*=2; /* stack size */
  1235.     }
  1236.     set_rlimits();
  1237.     /*init_random();*/
  1238.     seed_time();
  1239.     p=getvar("wims_seed");
  1240.     mystrncpy(buf,p,sizeof(buf));
  1241.     exec_setseed(buf);
  1242.     module_configure();
  1243.     set_job_ident();
  1244.     m_file.name[0]=0;m_file.linecnt=m_file.linepointer=0;
  1245.     p=getenv("QUERY_STRING");
  1246.     if(p==NULL || strlen(p)==0) {
  1247.       setvar("lang",lang);
  1248.       snprintf(homebuf,sizeof(homebuf),"module=%s",home_module);
  1249.       p=homebuf;
  1250.     }
  1251.     if(strlen(p)>=QUERY_STRING_LIMIT) user_error("parm_too_long");
  1252.     if(mpboundary[0]==0) {
  1253.       var_str=xmalloc(strlen(p)+2);
  1254.       parse_query_string(http2env(var_str,p),0);
  1255.     }
  1256.     else {
  1257.       var_str=stdinbuf;
  1258.       parse_query_string(inlen,1);
  1259.     }
  1260.     if(ismhelp) {
  1261.       p=getvar(ro_name[ro_cmd]);
  1262.       if(p==NULL || (strcmp(p,"help")!=0 && strcmp(p,"getins")!=0)) {
  1263.           mhelp(); goto outgo;
  1264.       }
  1265.     }
  1266.     check_exam();
  1267.     useropts();
  1268.     special_cmds();
  1269.     parse_ro_names();
  1270.     manager_check();
  1271.     access_check(0);
  1272. /* it is really for developing in wims, so no use in general */
  1273.   if (1==1) {
  1274.     if(strstr(tmp_debug,"yes")!=NULL && checkhost(manager_site)>=1)
  1275.       trace_file = fopen(mkfname(NULL,"%s/%s",tmp_dir,"trace.txt"),"a");
  1276.   }
  1277.   set_variables();
  1278.   determine_font(getvar("module_language"));
  1279.   determine_dirn(getvar("module_language"));
  1280.   if(!robot_access && session_prefix[0]!=0 && cmd_type!=cmd_help && !ismhelp)
  1281.     lastout_file=creat(mkfname(NULL,"%s/%s",s2_prefix,lastout),
  1282.                  S_IRUSR|S_IWUSR);
  1283.   p=getvar("module_score");
  1284.   if(p!=NULL) force_setvar("wims_seed_score",p);
  1285.   p=getvar("module_category");
  1286.   if(p==NULL || strstr(p,"tool")==NULL) default_form_method="get";
  1287.   if(noout) {
  1288.     write_logs(); save_session_vars();
  1289.     goto outgo;
  1290.   }
  1291.   if(ismhelp) {
  1292.     mhelp();
  1293.   }
  1294.   else {
  1295.     main_phtml_put(html_file);
  1296.     if(lastout_file!=-1) {
  1297.       flushoutput(); close(lastout_file); putlastout();
  1298.     }
  1299.     write_logs(); save_session_vars();
  1300.   }
  1301.   outgo:
  1302.   debug_output();
  1303.   if (trace_file)  { fclose(trace_file); trace_file=NULL; }
  1304.   if(var_str!=stdinbuf) free(var_str);
  1305.   delete_pid();
  1306.   if(mode!=mode_popup && trusted_module()) {
  1307.     p=getvar("wims_mode");
  1308.     if(p!=NULL && strcmp(p,"popup")==0) mode=mode_popup;
  1309.   }
  1310.   if(mode==mode_popup && insert_no==0) {
  1311.     p=getvar("wims_mode");
  1312.     if(p!=NULL && strcmp(p,"popup")==0) {
  1313.       remove_tree(session_prefix);
  1314.  
  1315.       remove_tree(s2_prefix);
  1316.     }
  1317.   }
  1318.   return 0;
  1319. }
  1320.