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/* Copyright (C) 1998-2003 XIAO, Gang of Universite de Nice - Sophia Antipolis
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* Web exerciser */
#include "wims.h"
struct {
char *name;
char *font;
} charname[]={
{"en","windows-1252"},
{"fr","windows-1252"},
{"es","windows-1252"},
{"cn","gb2312"},
{"de","windows-1252"},
{"it","windows-1252"},
{"nl","windows-1252"},
{"si","iso-8859-2"},
{"ar","iso-8859-6"},
{"tw","big5"},
{"pt","windows-1252"},
{"ca","windows-1252"},
{"pt","windows-1252"},
{"ru","iso-8859-5"},
{"ty","iso-8859-13"}
};
#define charname_no (sizeof(charname)/sizeof(charname[0]))
/* left to right or right to left writing */
struct {
char *name;
char *dirn;
} dirnname[]={
{"en","ltr"},
{"fr","ltr"},
{"es","ltr"},
{"cn","ltr"},
{"de","ltr"},
{"it","ltr"},
{"nl","ltr"},
{"si","ltr"},
{"ar","rtl"},
{"tw","ltr"},
{"pt","ltr"},
{"ca","ltr"},
{"pt","ltr"},
{"ru","ltr"},
{"ty","ltr"}
};
#define dirnname_no (sizeof(dirnname)/sizeof(dirnname[0]))
#define evalue strevalue
char *robot_session="../tmp/robot";
int robot_access=0,human_access=0;
int user_error_nolog=0;
char *good_agent[]={
"Mozilla","Netscape","Opera","WIMS",
"MSIE","Konqueror","Java"
};
#define good_agent_no (sizeof(good_agent)/sizeof(good_agent[0]))
char *bad_agent[]={ /* These are really bad agents: prohibited. */
"HTTrack","MemoWeb","Teleport","Offline","Wget","eCatch",
"Powermarks","EmailSiphon", "WebCopier"
};
#define bad_agent_no (sizeof(bad_agent)/sizeof(bad_agent[0]))
/* used for debugging */
int debug=0;
char class_dir[MAX_FNAME+1]; /* directory name of this class */
struct user_variable user_variable[MAX_VAR_NUM];
int user_var_no;
struct VAR_DEF var_def[MAX_VAR_NUM];
int defined_var_total;
/* Destinated to module error messages */
WORKING_FILE m_file,svar_file,mcache[MAX_MCACHE];
int mcachecnt;
/* Limit for any data working files. */
int WORKFILE_LIMIT=2048*1024;
/* whether the user has defined language */
int user_lang=0;
/* for instex grouping */
int instex_cnt=0, getwimstexsize=1;
char instex_src[MAX_LINELEN+1], instex_fname[MAX_LINELEN+1];
char *instex_processor="tex..gif";
/* Cookie management */
char cookiegot[256], cookieset[256], cookieheader[64]="WIMSUSER=";
/* multipart boundary */
char mpboundary[1024];
int deplen=0; /* length of deposit */
int confset=0; /* set to 1 if setvar for config */
/* Operating mode: default, popup, raw, etc. */
int mode=mode_default;
/* Switch; notice subroutines wherether we are outputing. */
int outputing;
char *home_module="home"; /* name of home module */
extern char **environ; /* table of environment variables */
int module_defined=0;
/* directory prefix buffers */
char session_prefix[MAX_FNAME+1], s2_prefix[MAX_FNAME+1], module_prefix[MAX_FNAME+1];
char *stdinbuf;
int sesrandomtab[MAX_SESRANDOM]; /* session random values */
char multiexec_random[64];
int executed_gotos; /* number of goto's executed. to check with GOTO_LIMIT. */
int insert_no; /* number of instex, insplot, insPLOT. */
int output_length; /* length of the output. */
int isexam=0; /* non-zero if request is exam */
int simuxam=0; /* exam is simulation */
int is_multiexec=0; /* for execredirected */
int multiexec_index;
int direct_datafile=0;
int exec_is_module=0;
/* root directory of modules */
char *module_dir="modules";
int new_session=0; /* =1 if new session created */
int good_httpd=0; /* Whether the http server is intelligent */
/* int internal_sql=0; */ /* for internal sql use */
int direct_exec=0; /* calc routine is exected by exec if 1 */
int print_precision=8; /* precision when printing real numbers */
int session_serial; /* request serial for session control */
int form_access=0; /* identifies form access, for robot identification */
int lastout_file=-1; /* file to hold last output */
char *instex_style=""; /* "": text "$": math "$$": displaymath */
int instex_usedynamic=0; /* always dynamic if 1 */
int wrapexec=0; /* if set to 1, change uid (nobody) to euid (wims).
* if set to -1, change euid to uid when exec(). */
int parm_restore=0; /* Restoring saved parameters? */
int exec_wait=1; /* whether to wait for fork return */
int execnt=0; /* count executions */
int readnest; /* nested read count */
int mfilecnt=0; /* count working files */
int forceresume=0; /* force user to resume old request */
int manageable=0; /* whether the connection may be site manager
* 0: no; 1: maybe; 2: sure */
int ismhelp=0; /* 1 if session is in mhelp. */
int getvar_len; /* length of the last-got variable. */
int noout=0; /* if set to 1 then output is skipped */
char tmp_dir[MAX_FNAME+1]; /* temporary directory */
char *bin_dir="bin"; /* directory containing executable scripts and programs. */
char cwdbuf[MAX_FNAME+1]; /* store current working directory */
char var_hacking=0; /* Trying to hack a variable? */
char *tmp_debug="no";
char *tmp_debug_var="";
char ins_alt[MAX_LINELEN+1]; /* dynamic insertion alternative text */
char *devel_modules="close"; /* whether to open devel modules */
int isclassmodule=0; /* 1 if the module is class module */
int isdevelmodule=0; /* development module? */
int setcookie=0; /* 1 if need to set cookie */
int killpid=0; /* pid of process to kill by alarm */
char *mathalign_sup1, *mathalign_sup2; /* see mathalign_base */
int substnest=0; /* nesting level of substit() */
int exodepOK=1;
long int startmtime; /* start time in milliseconds */
long int startmtime2; /* start time in microseconds */
int backslash_insmath=0; /* \(...) substitution? */
char examlogf[MAX_FNAME+1]; /* examlog file name */
char examlogd[MAX_FNAME+1]; /* examlog file name */
char exam_sheetexo[32]; /* sheet data of an exam */
char loadavg[64];
/* user file variable access control. */
char *var_readable, *var_writable, *var_nr, *var_nw, *var_pfx;
int hostcquota;
int var_noexport; /* do not export variable */
char tmplbuf[MAX_LINELEN+1]; /* for temporary uses not thru subroutines. */
struct tm *now, Now; /* time of request */
time_t nowtime, limtime, limtimex;
char nowstr[32];
/* Resource limits. Capital names are reserved by system. */
int rlimit_cpu=20; /* cpu time in seconds */
int rlimit_fsize=8388608;/* file size */
int rlimit_as=614457600;/* virtual memory size */
int rlimit_data=204857600;/* data segment size; maxima requires a lot (must be lower than rlimit_as)*/
int rlimit_stack=2097152;/* stack size */
int rlimit_core=0; /* core dump size */
int rlimit_rss=16777216; /* resident size */
int rlimit_nproc=1024; /* number of processes */
int rlimit_nofile=512; /* number of open files */
int rlimit_memlock=2097152;/* locked-in-memory address space */
char *var_str; /* malloc'ed buffer to hold translated query_string */
/* buffer to hold module's variable definition file, malloc'ed. */
char *var_def_buf;
/* job_identifier is even a reserved variable name */
char job_identifier[32];
/* site manager definition IPv4 IPv6*/
char *manager_site="127.0.0.1 ::1";
int manager_https=0;
/* sheet and exercise information */
int wims_sheet=0,wims_exo=0;
/* Form method: get or post */
char *default_form_method="post";
/* Je suis maintenant oblige de passer a l'anglais
* pour la langue de defaut.
*/
char lang[16]="en";
char available_lang[MAX_LANGUAGES][4]={"en","fr"};
int available_lang_no=2;
char pre_language[4]="";
FILE *trace_file;
int trace_indent=0;
char *protocol="http"; /* http or https */
/* check for coordinate input. This will mean that
* the request is manual, but not robot.
*/
int coord_input=0;
/* These are readonly environment variable names
* special parm used for special cmds (getins, etc).
*/
char *ro_name[]={
"cmd",
"empty",
"lang",
"module",
"session",
"special_parm",
"special_parm2",
"special_parm3",
"special_parm4",
"useropts" ,
"wims_session",
"wims_subsession",
"wims_window",
"worksheet"
};
int RO_NAME_NO=(sizeof(ro_name)/sizeof(ro_name[0]));
int cmd_type;
char *commands[]={
"intro" , "new" , "renew" , "reply" , "config" , "hint" , "help" ,
"resume", "next", "getins", "getframe", "getfile", "close", "ref"
};
int CMD_NO=(sizeof(commands)/sizeof(commands[0]));
/* stat=0: saved variables
* all names starting with wims_priv_ are also internal.
*/
struct internal_name internal_name[]={
{"accessright", 1}, /* right to access commercial resources */
{"caller", 1}, /* caller session */
{"check", 1}, /* for exam check use */
{"class", 1},
{"class_examlog", 1},
{"class_exolog", 1},
{"class_limit", 1},
{"class_quota", 1},
{"class_regpass", 1},
{"class_user_limit", 1},
{"classdir", 1},
{"classname", 1},
{"devel_modules", 1},
{"developer", 1},
{"doc_quota", 1},
{"doc_regpass", 1},
{"email", 1},
{"exo", 0}, /* exercise number */
{"exoption", 1}, /* exercise option */
{"exotrymax", 0},
{"firstname", 1},
{"forum_limit", 1},
{"home", 1},
{"institutionname", 1},
{"isexam", 0}, /* whether the sheet is an exam sheet */
{"ismanager", 0},
{"lastname", 1},
{"mode", 0}, /* operating mode */
{"module_start_time", 0},
{"now", 1}, /* date and time, yyyymmdd.hh:mm:ss */
{"nowseconds", 1}, /* date and time, seconds since EPOCH */
{"nr", 1}, /* non-readable variables in user file, words */
{"nw", 1}, /* non-writable variables in user file, words */
{"otherclass", 1}, /* Remember other logins */
{"participate", 1}, /* superclass definition */
{"prefix", 1}, /* user file prefix */
{"protocol", 0}, /* http protocol */
{"rafale", 0}, /* rapidfire request information */
{"readable", 1}, /* readable variables in user file, words */
{"realuser", 1}, /* real user for supervisor in gateway */
{"req_time", 0}, /* time of the request */
{"sclassdir", 1},
{"scorereg", 0}, /* score registration flag */
{"seed", 0},
{"seed_repeat",0},
{"seed_score", 0},
{"seedcnt",0},
{"seedlastcnt",0},
{"sequence", 0}, /* sequence number */
{"sescookie", 1}, /* session cookie */
{"sesdir", 1},
{"session_serial", 0}, /* request serial in the session */
{"session_start_time", 0},
{"sheet", 0}, /* sheet number */
{"sup_secure", 1}, /* secure level of supervisor */
{"superclass", 1}, /* superclass code */
{"superclass_quota", 1},
{"supertype", 1}, /* superclass type */
{"supervise", 1}, /* superclass definition */
{"supervisor", 1}, /* real name of the supervisor */
{"supervisormail",1}, /* email of supervisor */
{"trustfile", 1}, /* trusted files in special adm modules */
{"useropts", 1}, /* user options */
{"writable", 1}, /* writable variables in user file, words */
};
int INTERNAL_NAME_NO=(sizeof(internal_name)/sizeof(internal_name[0]));
char *httpd_vars[]={
"HTTP_ACCEPT",
"HTTP_ACCEPT_CHARSET",
"HTTP_ACCEPT_LANGUAGE",
"HTTP_COOKIE",
"HTTP_HOST",
"HTTP_USER_AGENT",
"HTTP_X_REQUESTED_WITH",
"HTTPS",
"QUERY_STRING",
"REMOTE_HOST",
"REMOTE_ADDR",
"REMOTE_PORT",
"REQUEST_METHOD",
"SCRIPT_NAME",
"SERVER_NAME",
"SERVER_SOFTWARE",
"SERVER_PROTOCOL"
};
#define HTTPD_VAR_NO (sizeof(httpd_vars)/sizeof(httpd_vars[0]))
/* security: these variables will not be visible to child processes */
char *unsetvars[]={
"DOCUMENT_ROOT","SERVER_SIGNATURE","SERVER_SOFTWARE",
"UNIQUE_ID","HTTP_KEEP_ALIVE","SSL_SESSION_ID"
};
#define unsetvarcnt (sizeof(unsetvars)/sizeof(unsetvars[0]))
int httpd_type=httpd_apache;
char *remote_addr=""; /* storing for performance */
char *remote_host="";
char ref_name[2048], ref_base[2048];
void put_special_page(char *pname);
void useropts(void);
/* Make certain httpd variables readable by modules */
void take_httpd_vars(void)
{
int i;
char *p, buf[MAX_NAMELEN+1];
var_noexport=1;
for(i=0;i<HTTPD_VAR_NO;i++) {
snprintf(buf,sizeof(buf),"httpd_%s",httpd_vars[i]);
if((p=getenv(httpd_vars[i]))!=NULL) setvar(buf,p);
}
var_noexport=0;
for(i=0;i<unsetvarcnt;i++) unsetenv(unsetvars[i]);
/* IPv4 IPv6*/
p=getenv("REMOTE_ADDR");if(p!=NULL && (strcmp(p,"127.0.0.1")==0 || strcmp(p,"::1")==0)) human_access=1;
p=getenv("HTTP_REFERER"); if(p!=NULL && *p!=0) setvar("wims_referer",p);
}
/* cookie2session */
void cookie2session(void)
{
char cksession[64], psession[32], *ckey, *p;
char nbuf[MAX_FNAME+1];
if(mode==mode_popup) return;
if(cookiegot[0]==0) {
ckset: cookiegot[0]=0; setcookie=1; return;
}
p=getvar("special_parm");
if(p!=NULL && strcmp(p,"ignorecookie")==0) return;
mystrncpy(cksession,cookiegot,sizeof(cksession));
ckey=strchr(cksession,'-');
if(ckey==NULL) goto ckset; else *ckey++=0;
p=getvar("wims_session"); if(p==NULL) p="";
if(strstr(p,"new")!=NULL) goto ckset;
mystrncpy(psession,p,sizeof(psession));
p=strchr(psession,'_'); if(p!=NULL) *p=0;
if(psession[0]!=0) {
if(strcmp(psession,cksession)==0) return;
if(session_exists(psession)) goto ckset;
if(session_exists(cksession)) goto change;
}
else {
if(!session_exists(cksession)) return;
change:
p=getenv("HTTPS");
if(p!=NULL && strcasecmp(p,"on")==0) goto ckset;
mkfname(nbuf,"%s/%s/var",session_dir,cksession);
getdef(nbuf,"w_wims_ismanager",tmplbuf);
if(tmplbuf[0]!=0 && tmplbuf[0]!='0') goto ckset;
getdef(nbuf,"w_wims_protocol",tmplbuf);
if(strcasecmp(tmplbuf,"https")==0) goto ckset;
mkfname(nbuf,"%s/%s/var.stat",session_dir,cksession);
getdef(nbuf,"wims_user",tmplbuf);
if(tmplbuf[0]!=0) goto ckset;
force_setvar(ro_name[ro_session],cksession);
setsesdir(cksession);
force_setvar("wims_subsession","");
session_serial=0;
}
}
void determine_font(char *l)
{
int i;
if(l==NULL || *l==0) return;
for(i=0;i<charname_no && memcmp(charname[i].name,l,2);i++);
if(i<charname_no) setvar("wims_main_font",charname[i].font);
}
void determine_dirn(char *l)
{
int i;
if(l==NULL || *l==0) return;
for(i=0;i<dirnname_no && memcmp(dirnname[i].name,l,2);i++);
if(i<dirnname_no) setvar("wims_main_dirn",dirnname[i].dirn);
}
void predetermine_language(void)
{
char *p;
int i,n;
if(pre_language[0]!=0) p=pre_language;
else p=getenv("HTTP_ACCEPT_LANGUAGE");
if(p!=NULL && strlen(p)>=2) {
for(i=0;i<available_lang_no && memcmp(p,available_lang[i],2)!=0;i++);
if(i<available_lang_no) goto lend;
}
p=getenv("HTTP_USER_AGENT");
if(p!=NULL && strlen(p)>=5) {
char *q;
if((q=strchr(p,'['))!=NULL && islower(*(q+1)) && islower(*(q+2)) && *(q+3)==']') {
char bb[4];
bb[0]=*(q+1);bb[1]=*(q+2);bb[2]=0;
for(i=0;i<available_lang_no && memcmp(bb,available_lang[i],2)!=0;i++);
if(i<available_lang_no) {
memmove(lang,bb,2); lang[2]=0;
goto lend2;
}
}
}
p=getenv("HTTP_HOST"); if(p==NULL) goto lend2;
n=strlen(p); if(n<=3 || *(p+n-3)!='.') goto lend2;
p=p+n-2;
for(i=0;i<available_lang_no && memcmp(p,available_lang[i],2)!=0;i++);
if(i<available_lang_no) {
lend: memmove(lang,p,2); lang[2]=0;
lend2: determine_font(lang);determine_dirn(lang);
}
}
/* print a special page */
void put_special_page(char *pname)
{
determine_font(lang);
determine_dirn(lang);
phtml_put_base(mkfname(NULL,"%s.phtml.%s",pname,lang),0);
write_logs();free(var_str);
}
/* check whether the connection is a site manager. */
void manager_check(void)
{
char *p, *pp, buf[16];
struct stat confstat;
int i;
manageable=0;
if(robot_access || *manager_site==0 || checkhost(manager_site)<1)
goto mend;
if(manager_https) {
p=getenv("HTTPS");
if(p==NULL || strcmp(p,"on")!=0) goto mend;
}
/* IPv4 IPv6*/
if(strcmp(remote_addr,"127.0.0.1")==0 || strcmp(remote_addr,"::1")==0) {
int port, port2;
char tester[128];
p=getenv("REMOTE_PORT"); if(p==NULL) goto mend;
port=atoi(p); if(port<1024 || port>65535) goto mend;
p=getenv("SERVER_PORT"); if(p==NULL) goto mend;
port2=atoi(p); if(port2>=10000 || port2<=0) goto mend;
/* this is very non-portable */
manageable=1;
accessfile(tmplbuf,"r","/proc/net/tcp");
snprintf(tester,sizeof(tester)," 0100007F:%04X 0100007F:%04X ",
port,port2);
p=strstr(tmplbuf,tester);
if(p!=NULL) {
pp=strchr(p,'\n'); if(pp!=NULL) *pp=0;
if(strlen(p)>=75) {
p=find_word_start(p+70); *find_word_end(p)=0;
if(atoi(p)==geteuid()) manageable=2;
}
}
}
else manageable=1;
i=stat(config_file,&confstat);
if(i==0 && manageable>0 && (confstat.st_mode&(S_IRWXO|S_IRWXG))!=0) manageable=-1;
if(manageable>0 && !trusted_module()) manageable=0;
if(manageable==1) {
accessfile(tmplbuf,"r","%s/.manager",session_prefix);
if(strstr(tmplbuf,"yes")!=NULL) manageable=2;
}
if(manageable==1) {
p=getvar(ro_name[ro_module]);
if(p!=NULL && strncmp(p,"adm/manage",strlen("adm/manage"))==0) {
struct stat pstat;
if(stat("../log/.wimspass",&pstat)==0) {
if((S_IFMT&pstat.st_mode)!=S_IFREG ||
((S_IRWXO|S_IRWXG)&pstat.st_mode)!=0)
manageable=-2;
}
}
}
mend:
mystrncpy(buf,int2str(manageable),sizeof(buf));
force_setvar("wims_ismanager",buf);
if(manageable>=2) {
struct rlimit rlim;
rlimit_cpu*=10;
rlim.rlim_cur=rlim.rlim_max=rlimit_cpu;
setrlimit(RLIMIT_CPU,&rlim);
mystrncpy(buf,int2str(rlimit_cpu),sizeof(buf));
setvar("wims_cpu_limit",buf);
initalarm();
}
}
/* check for robot access */
void robot_check(void)
{
char *ua, *p, *ses, *c, *mod;
int i;
if(human_access) return;
mod=getvar(ro_name[ro_module]);
if(mod!=NULL && strcmp(mod,"adm/raw")==0) return;
ses=getvar(ro_name[ro_session]);
/* user has valid session; OK */
if(ses!=NULL && strncmp(ses,robot_session,strlen(robot_session))!=0
&& strchr(ses,'/')==NULL
&& ftest(mkfname(NULL,"%s/%s",s2_dir,ses))==is_dir)
return;
ua=getenv("HTTP_USER_AGENT"); if(ua==NULL) ua="";
ua=find_word_start(ua);
if(strncasecmp(ua,"Mozilla",strlen("Mozilla"))==0 &&
(p=strstr(ua,"compatible"))!=NULL)
ua=find_word_start(find_word_end(p));
if(*ua) {
for(i=0;i<good_agent_no
&& strncasecmp(ua,good_agent[i],strlen(good_agent[i]));i++);
if(i<good_agent_no) return;
for(i=0;i<bad_agent_no
&& strstr(ua,bad_agent[i])==NULL;i++);
if(i<bad_agent_no) user_error("trapped");
}
force_setvar(ro_name[ro_session],robot_session);
setsesdir(robot_session);
c=getvar(ro_name[ro_cmd]);
robot_access=1;
if(c!=NULL && strcmp(c,"new") && strcmp(c,"intro")) {
force_setvar(ro_name[ro_cmd],"robot_error");
nph_header(450); put_special_page("robot");
flushoutput(); flushlog(); exit(0);
}
}
/* type=0: ordinary; type=1: multipart/form-data */
void parse_query_string(int len, int type)
{
int i,j,l,v,cmd_defined;
int parenth=-1, ll, lb, dlen;
char *start, *p, *p1, *pt, *b1="";
cmd_defined=0;
setvar("wims_subsession","");
ll=lb=0;
if(type) {
ll=strlen(mpboundary);
start=strstr(var_str,mpboundary);
if(start==NULL) start=var_str+strlen(var_str);
if(strstr(var_str,"\r\n\r\n")!=NULL) b1="\r\n\r\n";
else b1="\n\n";
lb=strlen(b1);
}
else start=var_str;
for(v=0, p1=start;p1<var_str+len;p1+=l) {
if(type) {
char *p2, *p3, *p4, *p5;
p2=p1+ll; p3=memstr(p2,mpboundary,var_str+len-p2); l=p3-p1;
p=memstr(p2,b1,var_str+len-p2); if(p>=p3) continue;
p+=lb;
if(p3<var_str+len) {
while(*p3!='\n' && p3>p2) p3--;
*p3=0;
p3--; if(*p3=='\r') *p3=0;
}
dlen=p3-p;
p2=memstr(p2,"name=",p3-p2); if(p2>=p3) continue;
p2+=strlen("name="); if(*p2=='"') p2++;
for(p3=p2; myisalnum(*p3) || strchr("._",*p3)!=NULL; p3++);
if(p3==p2) continue;
if(p3-p2==strlen("wims_deposit") &&
strncmp(p2,"wims_deposit",p3-p2)==0) {
p4=memstr(p1,"filename=",p-p1); if(p4<p) {
p4+=strlen("filename="); if(*p4=='"') {
p4++; p5=strchr(p4,'"');
if(p5==NULL || p5-p4>=MAX_FNAME) goto emptyquote;
}
else {
emptyquote:
for(p5=p4; p5<p && !isspace(*p5) &&
strchr(";\"~#*?=,'",*p5)==NULL; p5++);
}
if(p5>p4) {
*p5=0;
for(p5--;
p5>=p4 && !isspace(*p5) && strchr("/\\:",*p5)==NULL;
p5--);
if(p5>=p4) p4=p5+1;
if(*p4==0) goto noname;
if(strstr(p4,"..")!=NULL || *p4=='.')
p4="noname.file";
setvar("wims_deposit",p4);
}
else {
noname: setvar("wims_deposit","noname.file");
}
}
deplen=dlen;
}
*p3=0; l-=p2-p1; p1=p2;
}
else {
p1=find_word_start(p1);
l=strlen(p1)+1; p=strchr(p1,'=');
if(p==NULL) p=p1+strlen(p1);
if(*p==0 && l>1) {
user_variable[v].name="no_name";
user_variable[v].value=p1;
coord_input=1;
goto nnext;
}
*p++=0;
}
/* empty name or empty value: ignore */
if(*p1==0 || *p==0) continue;
/* We do not treat names containing '.' */
for(pt=strchr(p1,'.'); pt; pt=strchr(++pt,'.')) *pt='_';
/* Restrictions on variable names */
for(pt=p1; myisalnum(*pt) || *pt=='_'; pt++);
if(*pt) continue;
if(strcmp(p1,"wims_deposit")!=0) _tolinux(p);
/* This is a restriction:
* Every parameter must have matching parentheses.
*/
if(parenth==-1 && strncmp(p1,"freepar_",strlen("freepar_"))!=0
&& strcmp(p1,"wims_deposit")!=0
&& check_parentheses(p,1)) parenth=v;
if(strcmp(p1,"special_parm")==0 && strcmp(p,"wims")==0)
human_access=1;
j=search_list(ro_name,RO_NAME_NO,sizeof(ro_name[0]),p1);
if(j>=0) {
if(j==ro_session) {
p=find_word_start(p); *find_word_end(p)=0;
if(strlen(p)>MAX_SESSIONLEN) continue;
if(strcmp(p,robot_session)==0) p="";
if(strcasecmp(p,"popup")==0) {
mode=mode_popup;
force_setvar("wims_mode","popup");
force_setvar("session","");
continue;
}
}
if(j==ro_module) module_defined=1;
if(j==ro_cmd) {
p=find_word_start(p); *find_word_end(p)=0;
if(strlen(p)>16) continue;
cmd_defined=1;
}
if(j==ro_lang) {
if(strlen(p)!=2) continue;
for(i=0;i<available_lang_no && strcmp(available_lang[i],p)!=0;i++);
if(i<available_lang_no) {user_lang=1; ovlstrcpy(lang,p);}
else continue;
}
/* strip leading and trailing '/'s in module name */
if(j==ro_module) {
p=find_word_start(p); *find_word_end(p)=0;
while(*p=='/') p++;
while(*p!=0 && *(p+strlen(p)-1)=='/') *(p+strlen(p)-1)=0;
if(strlen(p)>MAX_MODULELEN) continue;
}
setvar(p1,p);
if(j==ro_session && mode!=mode_popup) {
char *pp, *pr;
char buf[1024];
mystrncpy(buf,p,sizeof(buf));
if((pp=strchr(buf,'.'))!=NULL) {
*pp++=0; session_serial=atoi(pp);
if(pp<0) pp=0;
}
else session_serial=0;
pp=strchr(buf,'_');
if(pp!=NULL && (pr=strstr(pp,"_mhelp"))!=NULL) {
*pr=0; ismhelp=1; lastout_file=-1;
setvar("wims_inssub","mh");
}
force_setvar("wims_session",buf);
if(pp!=NULL) force_setvar("wims_subsession",pp);
}
continue;
}
user_variable[v].name=p1;
user_variable[v].value=p;
nnext:v++; if(v>=MAX_VAR_NUM) user_error("too_many_variables");
}
user_var_no=v;
if(parenth>=0) {
char buf[16];
mystrncpy(buf,int2str(user_var_no),sizeof(buf));
setvar("user_var_no",buf);
for(i=0;i<user_var_no;i++) {
snprintf(buf,sizeof(buf),"name%d",i);
setvar(buf,user_variable[i].name);
snprintf(buf,sizeof(buf),"value%d",i);
setvar(buf,user_variable[i].value);
}
mystrncpy(buf,int2str(parenth),sizeof(buf));
setvar("bad_parentheses",buf);
user_error("unmatched_parentheses");
}
p=getenv("SCRIPT_NAME");
if(p!=NULL && (p=strstr(p,"/getfile/"))!=NULL) {
p+=strlen("/getfile/");
force_setvar(ro_name[ro_cmd],commands[cmd_getfile]);
force_setvar("special_parm",p);
cmd_defined=1;
}
if(module_defined && !cmd_defined) setvar(ro_name[ro_cmd],commands[cmd_intro]);
robot_check(); cookie2session();
}
/* parse special commands */
void special_cmds(void)
{
char *c, *p;
int i;
long int l=-1;
c=getvar(ro_name[ro_cmd]);
if(c==NULL || *c==0) { /* no module name nor command */
setvar(ro_name[ro_module],home_module);
setvar(ro_name[ro_cmd],commands[cmd_new]);
return;
}
for(i=0;i<CMD_NO && strcmp(commands[i],c)!=0; i++);
switch(i) {
case cmd_intro: {
set_module_prefix();
default_form_method="get";
if(ftest(mkfname(NULL,"%s/%s",module_prefix,intro_file))<0) {
force_setvar(ro_name[ro_cmd],commands[cmd_new]);
return;
}
p=getvar("wims_session");
if(p!=NULL && *p!=0) {
if(set_session_prefix()==0) check_session();
else {
trap_check(p);
if(strchr(p,'_')!=NULL && strchr(p,'/')==NULL) {
get_static_session_var();
}
}
}
/* determine http protocol name. How to detect? */
p=getenv("HTTPS");
if(p!=NULL && strcmp(p,"on")==0) {
protocol="https"; set_protocol();
}
force_setvar("wims_protocol",protocol);
determine_font(lang);
determine_dirn(lang);
main_phtml_put(intro_file); debug_output();
introend: write_logs();free(var_str);
delete_pid(); exit(0);
}
case cmd_ref: {
set_module_prefix();
default_form_method="get";
p=getvar("wims_session");
if(p!=NULL && *p!=0) {
if(set_session_prefix()==0) check_session();
else trap_check(p);
}
determine_font(lang);
determine_dirn(lang);
main_phtml_put(ref_file); goto introend;
}
case cmd_getins: {
c=getvar(ro_name[ro_special_parm]);
if(c==NULL || *c==0) {
user_error_nolog=1; user_error("no_insnum");
}
if(*c=='/' || strstr(c,"..")!=NULL) goto badins;
set_session_prefix();
if(strstr(session_prefix,"robot")!=NULL) exit(0);
l=filelength("%s/%s",s2_prefix,c);
if(l<0) {
badins: user_error_nolog=1; user_error("bad_insnum");
}
{
char *fmt;
fmt=strchr(c,'.');
if(fmt==NULL) {
user_error_nolog=1; user_error("bad_insnum");
}
else fmt++;
nph_header(200);
/* insert format problem; bricolage */
printf("Content-type: image/%s\r\n\
Content-length: %ld\r\n\r\n",fmt,l);
catfile(stdout,"%s/%s",s2_prefix,c); exit(0);
}
}
case cmd_getfile: {
char fname[MAX_FNAME+1];
c=getvar(ro_name[ro_special_parm]);
if(c==NULL || *c==0) {
user_error_nolog=1; user_error("no_insnum");
}
if(*c=='/' || strstr(c,"..")!=NULL) goto badfile;
set_session_prefix();
if(strstr(session_prefix,"robot")!=NULL) exit(0);
mkfname(fname,"%s/getfile/%s",session_prefix,c);
l=filelength("%s",fname);
if(l<0 && strchr(session_prefix,'_')!=NULL) {
char *pt;
mystrncpy(fname,session_prefix,sizeof(fname));
pt=strrchr(fname,'_'); if(pt) *pt=0;
snprintf(fname+(pt-fname),sizeof(fname)-(pt-fname),
"/getfile/%s",c);
l=filelength("%s",fname);
}
if(l<0) {
badfile: user_error_nolog=1; user_error("bad_insnum");
}
if(l>512*1024) {
struct rlimit rlim;
rlimit_cpu*=l/(10*1024);
rlim.rlim_cur=rlim.rlim_max=rlimit_cpu;
initalarm();
}
{
char *p1;
char mime[MAX_LINELEN+1];
for(p1=c+strlen(c);p1>c && isalpha(*(p1-1)); p1--);
ovlstrcpy(mime,"application/octet-stream");
if(p1>c && *(p1-1)=='.') {
setvar("translator_unknown",mime);
setvar("dictionary","bases/sys/mime");
snprintf(mime,sizeof(mime),"translator %s",p1);
calc_exec(mime);
}
nph_header(200);
printf("Content-type: %s\r\n\
Content-length: %ld\r\n\r\n",mime,l);
catfile(stdout,"%s",fname); exit(0);
}
}
case cmd_close: {
char *p, b2[32]; int w;
char nbuf[MAX_FNAME+1], vbuf[MAX_LINELEN+1];
p=getvar(ro_name[ro_session]);
if(p==NULL || strlen(p)<10 ||
strchr(p,'/')!=NULL) return;
mystrncpy(b2,p,sizeof(b2));
p=strchr(b2,'.'); if(p!=NULL) *p=0;
mkfname(nbuf,"%s/%s/var.stat",session_dir,b2);
getdef(nbuf,"wims_caller",vbuf);
if(vbuf[0]!=0) force_setvar(ro_name[ro_session],vbuf);
w=wrapexec; wrapexec=1;
call_sh("rm -Rf %s/%s* %s/%s* >/dev/null 2>&1",session_dir,b2,s2_dir,b2);
wrapexec=w; cookiegot[0]=0;
force_setvar(ro_name[ro_cmd],"new");
}
default: return;
}
}
/* This is run only when manually invoking the program.
* Verifies the orderedness of various list tables.
*/
int verify_tables(void)
{
if(verify_order(calc_routine,CALC_FN_NO,sizeof(calc_routine[0]))) return -1;
if(verify_order(exec_routine,EXEC_FN_NO,sizeof(exec_routine[0]))) return -1;
if(verify_order(main_config,MAIN_CONFIG_NO,sizeof(main_config[0]))) return -1;
if(verify_order(mathname,mathname_no,sizeof(mathname[0]))) return -1;
if(verify_order(hmname,hmname_no,sizeof(hmname[0]))) return -1;
if(verify_order(ro_name,RO_NAME_NO,sizeof(ro_name[0]))) return -1;
if(verify_order(distr_cmd,distr_cmd_no,sizeof(distr_cmd[0]))) return -1;
if(verify_order(internal_name,INTERNAL_NAME_NO,
sizeof(internal_name[0]))) return -1;
if(verify_order(tmathfn,tmathfn_no,sizeof(tmathfn[0]))) return -1;
if(verify_order(tmathvar,tmathvar_no,sizeof(tmathvar[0]))) return -1;
if(verify_order(modindex,MODINDEX_NO,sizeof(modindex[0]))) return -1;
if(verify_order(exportvars,exportvarcnt,sizeof(exportvars[0]))) return -1;
if(evaltab_verify()) return -1;
if(textab_verify()) return -1;
return 0;
}
void config_defaults(void)
{
int i;
for(i=0;i<MAIN_CONFIG_NO;i++) {
if((1&main_config[i].is_integer)==1) {
int *pi = (int*)main_config[i].address;
printf("DF_%s=%d\n",main_config[i].name, *pi);
}
else {
char **ps = (char**)main_config[i].address;
printf("DF_%s=%s\n",main_config[i].name,*ps);
}
}
}
/* get and set useroptions */
void useropts(void)
{
char *p;
setvar("lang",lang);
p=getvar("useropts");
if(p==NULL || *p==0) p=getvar("wims_useropts");
if(p!=NULL && *p!=0) {
if(myisdigit(p[0])) {
usertexsize=p[0]-'0';
/* fourth digit is for special fonts*/
if(p[1]!=0) { mathalign_base=p[1]-'0'; }
}
if(myisdigit(p[3]) && p[3]!=0){ spec_font=p[3]-'0';}
}
if(mathalign_base==1) {
mathalign_sup1="<sup>"; mathalign_sup2="</sup>";
} else mathalign_sup1=mathalign_sup2="";
}
/* popup module help */
void mhelp(void)
{
char *p, buf[MAX_LINELEN+1];
main_phtml_put(""); buf[0]=0;
if(cmd_type!=cmd_help) {
phtml_put_base("closemhelp.phtml",0);
}
else {
phtml_put_base("mhelpheader.phtml",0);
p=getvar("special_parm");
if(p!=NULL && strcmp(p,"about")==0)
phtml_put("about.phtml",0);
else phtml_put("help.phtml",0);
phtml_put_base("mhelptail.phtml",0);
exec_tail(buf);
}
}
#define READSTDIN_WINDOW 4096
void readstdin(int len)
{
int ll, l1, lt, lr;
int cpulim;
cpulim=rlimit_cpu; rlimit_cpu=3;
lr=len; l1=0;
while(lr>0) {
nowtime=time(0); initalarm();
ll=lr; if(ll>READSTDIN_WINDOW) ll=READSTDIN_WINDOW;
lt=fread(stdinbuf+l1,1,ll,stdin);
if(lt!=ll) user_error("parm_too_long");
lr-=ll; l1+=ll;
}
if(l1!=len) user_error("parm_too_long");
stdinbuf[len]=0; rlimit_cpu=cpulim;
}
/* input: p=QUERY_STRING. output: parameter length. */
/* Netscape puts form content into /tmp. */
int formdata(char *p)
{
char *pp;
int inlen;
char *ctype;
inlen=0; ctype=getenv("CONTENT_TYPE");
if(ctype==NULL || strstr(ctype,"multipart/form-data")==NULL
|| (p=strstr(ctype,"boundary="))==NULL) {
bad: stdinbuf=""; return 0;
}
pp=getenv("CONTENT_LENGTH");
if(pp==NULL) goto bad;
inlen=atoi(pp); if(inlen<=10) goto bad;
if(inlen>=MAX_DEPOSITLEN) user_error("parm_too_long");
stdinbuf=xmalloc(inlen+1); readstdin(inlen);
p+=strlen("boundary=");
for(pp=p;myisalnum(*pp) || *pp=='-'; pp++);
if(pp-p<sizeof(mpboundary)-2) {
memmove(mpboundary,p,pp-p); mpboundary[pp-p]=0;
}
/* empty data */
if(strstr(stdinbuf,mpboundary)==NULL || strstr(stdinbuf,"name=")==NULL) {
free(stdinbuf); goto bad;
}
form_access=1; post_log();
return inlen;
}
/* get the content of POST */
void getpost(void)
{
int ll;
char *pp;
pp=getenv("CONTENT_LENGTH");
if(pp==NULL || (ll=atoi(pp))<=0) {
stdinbuf=xmalloc(16); stdinbuf[0]=0;
}
else {
if(ll>QUERY_STRING_LIMIT) user_error("parm_too_long");
stdinbuf=xmalloc(ll+16); readstdin(ll);
if(ll>0) {
setenv("QUERY_STRING",stdinbuf,1);
form_access=1; post_log();
}
}
}
void buffer_init(void)
{
struct timeval tv;
mcachecnt=readnest=0;
mpboundary[0]=cookiegot[0]=cookieset[0]=cwdbuf[0]=0;
rscore_class[0]=rscore_user[0]=multiexec_random[0]=0;
lastftest[0]=0;
lastdatafile[0]=0; lastdata=xmalloc(WORKFILE_LIMIT);
outptr=outbuf;
instex_src[0]=instex_fname[0]=module_prefix[0]=0;
examlogf[0]=examlogd[0]=exam_sheetexo[0]=0;
stdinbuf=NULL;
mkfname(tmp_dir,"../tmp/forall");
mkfname(session_dir,"../%s",SESSION_BASE);
mkfname(s2_dir,"../%s",S2_BASE);
if(gettimeofday(&tv,NULL)) startmtime=startmtime2=0;
else {
startmtime=((tv.tv_sec%10000)*1000+tv.tv_usec/1000);
startmtime2=(tv.tv_sec%1000)*1000000+tv.tv_usec;
}
}
/**
* runs the test suite, to check whether the documented commands of modtool
* behave properly.
* @param prefix path to the proc file to process
* @param p name of the proc file to proceed
* @param vars a list of var names to print.
**/
void test_suite(char *prefix, char *p, char *vars){
char *v, *nextv;
mystrncpy(module_prefix, prefix, sizeof(module_prefix));
exec_read(p);
nextv=vars;
while (*nextv!='\0'){
v=find_word_start(nextv);
nextv=find_word_end(v);
if (*nextv != '\0'){
*nextv++='\0';
}
v=getvar(v);
if(v) puts(v); else putchar('\n');
}
}
int main(int argc, char *argv[], char *envp[])
{
/******************************
* modify a few rlimits for 64-bit processors
*/
int wordSize=32;
#ifdef __IA64__
wordSize=64;
#endif
#ifdef __x86_64__
wordSize=64;
#endif
if (wordSize==64){
rlimit_as*=2; /* virtual memory size */
rlimit_data*=2; /* data segment size; maxima requires a lot */
rlimit_stack*=2; /* stack size */
}
/****************************/
char *p, homebuf[MAX_FNAME+1], lbuf[32], buf[64];
int inlen=0;
/* int mfd; */
class_dir[0]=0;
substitute=substit; buffer_init(); var_init();
/* WIMS internal locale is always C. */
setenv("LANG","C",1); umask(022);
setenv("LANGUAGE","us",1);
setenv("LC_ALL","C",1);
if(argc>1) {
if(strcasecmp(argv[1],"table")==0) {
if(verify_tables()) internal_error("Table disorder.");
else printf("Table orders OK.\n");
return 0;
}
if(strcasecmp(argv[1],"version")==0) {
printf("%s",wims_version); return 0;
}
if(strcasecmp(argv[1],"defaults")==0) {
config_defaults(); return 0;
}
if(strcasecmp(argv[1],"test")==0) {
/* launches a test suite */
if (argc < 5) {
printf("Not enough arguments to launch a test; usage:\n");
printf("wims test path_to_file name_of_proc_file 'var1 var2 ...'\n\n");
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");
return 1;
}
test_suite(argv[2], argv[3], argv[4]);
return 0;
}
}
p=getenv("SERVER_SOFTWARE"); if(p!=NULL && strcasecmp(p,"WIMS")==0)
httpd_type=httpd_wims;
p=getenv("REMOTE_ADDR"); if(p!=NULL) remote_addr=p;
p=getenv("REMOTE_HOST"); if(p!=NULL) remote_host=p;
nowtime=time(0); now=localtime(&nowtime);
/* nowtime contains the seconds elapsed from EPOCH (1970)
but tm_year is set to current year-1900.
*/
memmove(&Now, now, sizeof(Now)); now=&Now;
snprintf(nowstr,sizeof(nowstr),"%04d%02d%02d.%02d:%02d:%02d",
(now->tm_year)+1900,(now->tm_mon)+1,now->tm_mday,
now->tm_hour,now->tm_min,now->tm_sec);
p=getenv("QUERY_STRING");
if(p==NULL || *p==0) getpost();
else if(strncmp(p,"form-data",9)==0) inlen=formdata(p);
force_setvar("wims_now",nowstr);
snprintf(lbuf,sizeof(lbuf),"%lu",nowtime);
force_setvar("wims_nowseconds",lbuf);
nowtime=time(0);
initalarm();
executed_gotos=insert_no=output_length=0; ins_alt[0]=0;
setvar("empty",""); /* lock this variable */
setvar("wims_version",wims_version);
setvar("wims_version_date",wims_version_date);
setvar("wims_main_font","utf-8");
take_httpd_vars();
main_configure();
checklogd();
/* mfd=shm_open(SHM_NAME,O_RDONLY,-1);
* if(mfd==-1) internal_error("Unable to find shared memory.");
* shmptr=mmap(0,SHM_SIZE,PROT_READ,MAP_SHARED,mfd,0);
* if(shmptr==MAP_FAILED) internal_error("Shared memory failure.");
*/
getppid(); /* this is the first sysmask trigger, must be after checklogd() */
predetermine_language();
/* modify a few rlimits for 64-bit processors */
if (sizeof(long) == 8) {
rlimit_as*=2; /* virtual memory size */
rlimit_data*=2; /* data segment size; maxima requires a lot */
rlimit_stack*=2; /* stack size */
}
set_rlimits();
/*init_random();*/
seed_time();
p=getvar("wims_seed");
mystrncpy(buf,p,sizeof(buf));
exec_setseed(buf);
module_configure();
set_job_ident();
m_file.name[0]=0;m_file.linecnt=m_file.linepointer=0;
p=getenv("QUERY_STRING");
if(p==NULL || strlen(p)==0) {
setvar("lang",lang);
snprintf(homebuf,sizeof(homebuf),"module=%s",home_module);
p=homebuf;
}
if(strlen(p)>=QUERY_STRING_LIMIT) user_error("parm_too_long");
if(mpboundary[0]==0) {
var_str=xmalloc(strlen(p)+2);
parse_query_string(http2env(var_str,p),0);
}
else {
var_str=stdinbuf;
parse_query_string(inlen,1);
}
if(ismhelp) {
p=getvar(ro_name[ro_cmd]);
if(p==NULL || (strcmp(p,"help")!=0 && strcmp(p,"getins")!=0)) {
mhelp(); goto outgo;
}
}
check_exam();
useropts();
special_cmds();
parse_ro_names();
manager_check();
access_check(0);
/* it is really for developing in wims, so no use in general */
if (1==1) {
if(strstr(tmp_debug,"yes")!=NULL && checkhost(manager_site)>=1)
trace_file = fopen(mkfname(NULL,"%s/%s",tmp_dir,"trace.txt"),"a");
}
set_variables();
determine_font(getvar("module_language"));
determine_dirn(getvar("module_language"));
if(!robot_access && session_prefix[0]!=0 && cmd_type!=cmd_help && !ismhelp)
lastout_file=creat(mkfname(NULL,"%s/%s",s2_prefix,lastout),
S_IRUSR|S_IWUSR);
p=getvar("module_score");
if(p!=NULL) force_setvar("wims_seed_score",p);
p=getvar("module_category");
if(p==NULL || strstr(p,"tool")==NULL) default_form_method="get";
if(noout) {
write_logs(); save_session_vars();
goto outgo;
}
if(ismhelp) {
mhelp();
}
else {
main_phtml_put(html_file);
if(lastout_file!=-1) {
flushoutput(); close(lastout_file); putlastout();
}
write_logs(); save_session_vars();
}
outgo:
debug_output();
if (trace_file) { fclose(trace_file); trace_file=NULL; }
if(var_str!=stdinbuf) free(var_str);
delete_pid();
if(mode!=mode_popup && trusted_module()) {
p=getvar("wims_mode");
if(p!=NULL && strcmp(p,"popup")==0) mode=mode_popup;
}
if(mode==mode_popup && insert_no==0) {
p=getvar("wims_mode");
if(p!=NULL && strcmp(p,"popup")==0) {
remove_tree(session_prefix);
remove_tree(s2_prefix);
}
}
return 0;
}
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