WebSVN – wimsdev – Blame – /trunk/wims/src/lines.c

Rev	Author	Line No.	Line
10	reyssat	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	/* line input / output / translation routines
		18	* and error routines */
		19
		20	int is_class_module=0;
		21
		22	int trusted_module(void);
		23	void phtml_put_base(char *fname,int cache);
		24	void module_error(char msg[]);
		25	void user_error(char msg[]);
		26	void accessfile(char content, char type, char *s,...);
		27	int remove_tree(char *p);
		28	void output(char *s,...);
		29	char _getvar(char vname);
		30	int checkhost(char *hlist);
		31
		32	char *lastdata;
		33	char lastdatafile[MAX_FNAME+1];
		34	char *datacache[DATAFIELD_LIMIT];
		35	int nextdatacache;
		36	struct stat ftst;
		37	char lastftest[MAX_FNAME+1];
		38	int lastftype;
		39	char outbuf[8192];
		40	char *outptr;
		41
		42	/* These modules can execute private programs.
		43	* adm/ modules are always trusted, so need no definition here. */
		44	char *trusted_modules="";
		45	/* bit 0: module is not trusted.
		46	* bit 1: file in wimshome.
		47	* bit 2: readdef or file in writable directory.
		48	*/
		49	int untrust=0; /* non-zero if user detrusts the module. */
		50
		51	int error_status=0;
		52	char pidbuf[32];
		53	#include <utime.h>
		54
		55	void delete_pid(void);
		56
		57	/* Internal use only */
		58	void _debug(char *s,...)
		59	{
		60	va_list vp;
		61	char buf[MAX_LINELEN+1];
		62
		63	va_start(vp,s);
		64	vsnprintf(buf,sizeof(buf),s,vp);
		65	va_end(vp);
		66	setvar("debug",buf); module_error("debug");
		67	exit(1);
		68	}
		69
		70
		71	/* HTTP response header for non-processed CGI interface */
		72	void nph_header(int code)
		73	{
		74	char *cstr;
		75	switch(code) {
		76	case 200: cstr="OK"; break;
		77	case 301: cstr="Moved Permanently"; break;
		78	case 302: cstr="Moved Temporarily"; break;
		79	case 420: cstr="WIMS Nested Error"; break;
		80	case 450: cstr="WIMS User Error"; break;
		81	case 500: cstr="WIMS Internal Error"; break;
		82	case 550: cstr="WIMS Module Error"; break;
		83	default: cstr="ERROR"; break;
		84	}
		85	if(httpd_type!=httpd_wims) printf("Status: %d %s\r\n",code,cstr);
		86	else {
		87	char *p, tbuf[256];
		88	mystrncpy(tbuf,ctime(&nowtime),sizeof(tbuf));
		89	for(p=tbuf+strlen(tbuf);p>=tbuf && ((p-1)=='\n' \|\| (p-1)=='\r'); p--);
		90	*p=0;
		91	printf("HTTP/1.0 %d %s\r\n\
		92	Date: %s\r\n\
		93	Connection: close\r\n\
		94	",code,cstr,tbuf);
		95	}
		96	}
		97
		98	void flushoutput(void)
		99	{
		100	int l2;
		101	if(outptr<=outbuf) return;
		102	l2=outptr-outbuf;
3843	kbelabas	103	if(lastout_file!=-1) (void)write(lastout_file,outbuf,l2);
10	reyssat	104	else fwrite(outbuf,l2,1,stdout);
		105	outptr=outbuf;
		106	}
		107
		108	void internal_warn(char msg[])
		109	{
		110	char buf[1024];
		111	fprintf(stderr,"wims: %s\n%s\n",msg,strerror(errno));
		112	snprintf(buf,sizeof(buf),"%s: %s\n",nowstr,msg);
		113	accessfile(buf,"a","%s/internal_error.log",log_dir);
		114	}
		115
		116	/* Internal error: panic and forget about requester. */
		117	void internal_error(char msg[])
		118	{
		119	if(error_status<2) {
		120	nph_header(500);
		121	printf("Cache-Control: no-cache\nPragma: no-cache\r\n\
		122	Content-type: text/plain\r\n\r\n\r\n\
		123	WIMS panick! %s\n%s\n",msg,strerror(errno));
		124	error_status=2; internal_warn(msg);
		125	}
		126	delete_pid(); exit(1);
		127	}
		128
		129	void tex_nospace(char *p)
		130	{
		131	char p1, p2;
		132	char buf[MAX_LINELEN+1];
		133	for(p1=buf,p2=p;*p2 && p1-buf<MAX_LINELEN-4;p2++) {
		134	if(!isspace(p2)) {p1++=*p2;continue;}
		135	while(isspace(*p2)) p2++;
		136	if(*(p1-1)=='\\' \|\|
		137	(p1>buf && myisalnum((p1-1)) && myisalnum(p2)))
		138	*p1++=' ';
		139	p1++=p2;
		140	}
		141	*p1++=0; memmove(p,buf,p1-buf);
		142	}
		143
		144	void nametoolong(char *p)
		145	{
		146	char buf[MAX_FNAME+17];
		147	snprintf(buf,sizeof(buf),"%s...",p);
		148	force_setvar("wims_error_data",buf);
		149	module_error("file_name_too_long");
		150	}
		151
		152	enum{is_file, is_dir, is_exec, is_fifo, is_socket, is_unknown};
		153	off_t ftest_size;
		154
		155	/* A simple front-end of stat(). */
		156	int ftest(char *fname)
		157	{
		158	if(strcmp(fname,lastftest)==0) return lastftype;
		159	/* if(fname[0]=='/' \|\| fname[0]=='.') fprintf(stderr,"ftest: %s\n",fname); */
		160	mystrncpy(lastftest,fname,sizeof(lastftest));
		161	if(stat(fname,&ftst)) return lastftype=-1;
		162	ftest_size=ftst.st_size;
		163	if(S_ISREG(ftst.st_mode)) {
		164	if((ftst.st_mode&(S_IXUSR\|S_IXGRP\|S_IXOTH))!=0) return lastftype=is_exec;
		165	else return lastftype=is_file;
		166	}
		167	if(S_ISDIR(ftst.st_mode)) return lastftype=is_dir;
		168	if(S_ISFIFO(ftst.st_mode)) return lastftype=is_fifo;
		169	if(S_ISSOCK(ftst.st_mode)) return lastftype=is_socket;
		170	return lastftype=is_unknown;
		171	}
		172
		173	char fnbuf[MAX_FNAME+1];
		174
		175	/* make a filename and check length */
		176	char mkfname(char buf[], char s,...)
		177	{
		178	va_list vp;
		179	char *p;
		180
		181	if(buf==NULL) p=fnbuf; else p=buf;
		182	va_start(vp,s);
		183	vsnprintf(p,MAX_FNAME,s,vp);
		184	va_end(vp);
		185	if(strlen(p)>=MAX_FNAME-1) nametoolong(p);
		186	return p;
		187	}
		188
		189	void sysmask_trigger(char *s)
		190	{
		191	char buf[MAX_FNAME+1];
		192	struct stat st;
		193	mkfname(buf,"%s/%s",sysmask_trigger_dir,s);
		194	stat(buf,&st);
		195	}
		196
		197	/* read-in a file into buffer. Use open() and read().
		198	* Return buffer address which will be malloc'ed if buf=NULL. */
		199	char readfile(char fname, char buf[], long int buflen)
		200	{
		201	int fd, t, st;
		202	long int l, lc;
		203	char *bf;
		204	t=0; if(buf) buf[0]=0;
		205	st=ftest(fname); if(st!=is_file) {
		206	if(st==is_exec) { /* refuse to open executable file */
		207	setvar("executable",fname); module_error("executable");
		208	}
		209	return NULL;
		210	}
		211	l=ftst.st_size; if(l<0) return NULL;
		212	if(l>=buflen) {
		213	if(buflen<MAX_LINELEN) l=buflen-1;
		214	else {
		215	if(strncmp(fname,"modules/",strlen("modules/"))==0) {
		216	setvar(error_data_string,fname); module_error("file_too_long");
		217	}
		218	else user_error("cmd_output_too_long");
		219	}
		220	}
		221	fd=open(fname,O_RDONLY); if(fd==-1) return NULL;
		222	if(buf==NULL) bf=xmalloc(l+8); else {bf=buf;if(l==0) {t=1; l=buflen-1;}}
		223	lc=read(fd,bf,l); close(fd);
		224	if(lc<0 \|\| lc>l \|\| (lc!=l && t==0))
		225	{if(buf==NULL) free(bf); else buf[0]=0; return NULL;}
		226	bf[lc]=0; _tolinux(bf); return bf;
		227	}
		228
		229	/* Get a line in a stored working file.
		230	* Buffer length is always MAX_LINELEN. */
		231	int wgetline(char buf[], size_t buflen, WORKING_FILE *f)
		232	{
		233	int i,j; unsigned int n;
		234	i=f->linepointer; buf[0]=0;
		235	if(i>=f->linecnt \|\| f->textbuf==NULL) return EOF;
		236	n=f->lines[i].llen;
		237	if(n>=buflen) n=buflen-1;
		238	if(n>0) memmove(buf,f->lines[i].address,n); buf[n]=0;
		239	for(j=i+1;j<f->linecnt && f->lines[j].isstart==0;j++);
		240	f->l=i; f->linepointer=j;
		241	if(j>=f->linecnt && n==0) return EOF; else return n;
		242	}
		243
		244	int get_cached_file(char *name)
		245	{
		246	int i,l,flag;
		247	l=strlen(name); if(l>=127) return -1;
		248	if(strncmp(module_prefix,module_dir,strlen(module_dir))!=0) flag=8; else flag=0;
		249	for(i=0;i<mcachecnt;i++) {
		250	if(flag==mcache[i].nocache && strcmp(name,mcache[i].name)==0) {
		251	memmove(&m_file,mcache+i,sizeof(WORKING_FILE));
		252	m_file.nocache\|=4;
		253	return i;
		254	}
		255	}
		256	return -1;
		257	}
		258
		259	/* Open a work file. Returns 0 if OK. */
		260	int open_working_file(WORKING_FILE f, char fname)
		261	{
		262	char p, q;
		263	void *vp;
		264	int i,j,k,laststart,lc[LINE_LIMIT];
		265
		266	f->linecnt=f->linepointer=0;
		267	f->for_idx=f->nocache=0;
		268	f->l=-1; f->lines=NULL;
		269	f->textbuf=readfile(fname,NULL,WORKFILE_LIMIT);
		270	if(f->textbuf==NULL) return -1;
		271	p=f->textbuf; if(*p) {
		272	for(i=0,p--; i<LINE_LIMIT-1 && p!=NULL;p=strchr(p,'\n')) {
		273	if(i>0) *p=0;
		274	lc[i++]=(++p-f->textbuf);
		275	}
		276	}
		277	else i=0;
		278	if(i>=LINE_LIMIT-1) module_error("file_too_long");
		279	lc[i]=lc[i-1]+strlen(f->textbuf+lc[i-1])+1;
		280	f->textbuf[lc[i]]=0;
		281	f->linecnt=i; laststart=0;
		282	f->for_stack=xmalloc(MAX_FOR_LEVELsizeof(FOR_STACK)+(i+1)sizeof(LINE_STRUCT));
		283	vp=f->for_stack+MAX_FOR_LEVEL; f->lines=vp;
		284	for(j=0;j<i;j++) {
		285	f->lines[j].address=p=(f->textbuf)+lc[j];
		286	f->lines[j].llen=lc[j+1]-lc[j]-1;
		287	(f->lines[j]).execcode=(f->lines[j]).varcode=-1;
		288	if(j==0) goto normal;
		289	q=f->lines[laststart].address+f->lines[laststart].llen-1;
		290	if(q>=f->textbuf && *q=='\\') {
		291	f->lines[laststart].llen+=f->lines[j].llen; *q='\n';
		292	f->lines[j].isstart=f->lines[j].llen=0;
		293	memmove(q+1,p,lc[j+1]-lc[j]);
		294	}
		295	else {
		296	normal: for(q=p;myislspace(*q);q++);
		297	f->lines[j].isstart=1; laststart=j; k=0;
		298	switch(*q) {
		299	/* isstart: bit 1 = start.
		300	* bit 2 = exec
		301	* bit 3 (4) = label
		302	* bit 4 (8) = hard comment (!!)
		303	* bit 5 (16) = soft comment (#) */
		304	case exec_prefix_char: {
		305	if(myisalpha(q[1])) f->lines[j].isstart=3;
		306	else f->lines[j].isstart=9;
		307	k=1; break;
		308	}
		309	case label_prefix_char: {f->lines[j].isstart=5; k=1; break;}
		310	case comment_prefix_char: {f->lines[j].isstart=17; break;}
		311	default: {f->lines[j].isstart=1; break;}
		312	}
		313	if(k && q>p) {f->lines[j].address=q;f->lines[j].llen-=q-p;}
		314	}
		315	}
		316	f->lines[i].isstart=1; f->lines[i].llen=0;
		317	f->lines[i].address=(f->textbuf)+lc[i];
		318	mfilecnt++; return 0;
		319	}
		320
		321	/* close an earlier opened working file */
		322	void close_working_file(WORKING_FILE *f, int cache)
		323	{
		324	f->linepointer=f->l=0;
		325	if(cache && untrust==0 && mcachecnt<MAX_MCACHE && (f->nocache&7)==0) {
		326	memmove(mcache+mcachecnt,f,sizeof(WORKING_FILE));
		327	mcachecnt++;
		328	}
		329	else if((f->nocache&4)==0) {
		330	if(f->for_stack!=NULL) free(f->for_stack);
		331	if(f->textbuf!=NULL) free(f->textbuf);
		332	}
		333	f->for_stack=NULL; f->textbuf=NULL; f->linecnt=0;
		334	}
		335
		336	void free_mcache(void)
		337	{
		338	int i;
		339	untrust=0;
		340	for(i=mcachecnt-1;i>=0;i--) close_working_file(mcache+i,0);
		341	mcachecnt=0;
		342	}
		343
		344	void cleantmpdir(void);
		345	void user_error_log(char msg[]);
		346
		347	void nested_error(char msg[])
		348	{
		349	fprintf(stderr,"\nNested error! %s\n",msg);
		350	nph_header(420);
		351	printf("\r\n\r\nWIMS error processing aborted on nested error.\r\n\r\n%s\r\n",msg);
		352	delete_pid(); exit(1);
		353	}
		354
		355	/* Send an error message to requester and exit.
		356	* This is for user errors, language-sensitive. */
		357	void user_error(char msg[])
		358	{
		359	char erfname[MAX_FNAME+1];
		360
		361	if(error_status) nested_error(msg);
		362	error_status=1;
		363	mkfname(erfname,"%s.%s",user_error_msg_file,lang);
		364	if(ftest(erfname)!=is_file) internal_error("user_error(): error message file not found.\n\
		365	Bad installation.");
		366	force_setvar("wims_user_error",msg);
		367	if(strcmp(msg,"threshold")!=0) user_error_log(msg);
		368	memmove(module_prefix,".",2);
		369	if(lastout_file!=-1 && outputing) {
		370	flushoutput(); close(lastout_file); lastout_file=-1;
		371	}
		372	nph_header(450);
		373	phtml_put_base(erfname,0);
		374	if(strcmp(msg,"double_click")!=0) delete_pid();
		375	else {
		376	cleantmpdir(); flushlog();
		377	}
		378	flushoutput(); exit(0);
		379	}
		380
		381	void module_error_log(char msg[]);
		382
		383	/* Messages for module errors. English only. */
		384	/* This is really rudimentary for the time being. */
		385	void module_error(char msg[])
		386	{
		387	int send=0;
		388	char *p;
		389	WORKING_FILE mf;
		390
		391	if(error_status) nested_error(msg);
		392	error_status=1; untrust=0;
		393	module_error_log(msg);
		394	nph_header(550);
		395	printf("Server: %s %s (%s)\r\n", SHORTSWNAME,wims_version,LONGSWNAME);
		396	p=getvar("wims_main_font");
		397	if(p!=NULL && *p!=0) printf("Content-type: text/plain; charset=%s\r\n\r\n",p);
		398	else printf("Content-type: text/plain\r\n\r\n");
		399	p=getvar(ro_name[ro_module]); if(p==NULL) p="???";
		400	printf("ERROR.\n\nwims has detected an error in the module '%s'.",p);
		401	if(m_file.l>=0) printf("\n\nIn file '%s', line %d:",
		402	m_file.name,m_file.l+1);
		403	printf(" %s.\n\n",msg);
		404	if(open_working_file(&mf,mkfname(NULL,"%s.%s",module_error_msg_file,lang))!=0)
		405	internal_error("module_error(): error message file not found.");
		406	while(wgetline(tmplbuf,MAX_LINELEN,&mf)!=EOF) {
		407	if(tmplbuf[0]!=tag_prefix_char) {
		408	if(send) {substit(tmplbuf); puts(tmplbuf);}
		409	continue;
		410	}
		411	strip_trailing_spaces(tmplbuf);
		412	if(tmplbuf[1]==0 \|\| strcmp(msg,tmplbuf+1)==0) send=1;
		413	else send=0;
		414	}
		415	close_working_file(&mf,0);
		416	outptr=outbuf; delete_pid(); exit(1);
		417	}
		418
		419	/* Output kernel routine */
		420	void _output_(char *s)
		421	{
		422	int l,l2;
		423	l=strlen(s); output_length+=l;
		424	if(output_length>=OUTPUT_LENGTH_LIMIT) {
		425	module_error("output_too_long"); return;
		426	}
		427	l2=sizeof(outbuf)-(outptr-outbuf);
		428	put: if(l<=l2) {
		429	memmove(outptr,s,l); outptr+=l; return;
		430	}
		431	memmove(outptr,s,l2); s+=l2; l-=l2;
3843	kbelabas	432	if(lastout_file!=-1) (void)write(lastout_file,outbuf,sizeof(outbuf));
10	reyssat	433	else fwrite(outbuf,sizeof(outbuf),1,stdout);
		434	outptr=outbuf; l2=sizeof(outbuf); goto put;
		435	}
		436
		437	/* Output with no var. */
		438	void output0(char buf[])
		439	{
		440	char p1, p2, *ps;
		441	int dynsave;
		442	if(backslash_insmath) {
		443	ps=buf; dynsave=instex_usedynamic;
		444	for(p1=strstr(buf,"\\("); p1; p1=strstr(p2,"\\(")) {
		445	p2=find_matching(p1+2,')');
		446	if(p2==NULL) break;
		447	if(p1>buf && *(p1-1)=='\\') continue;
		448	p1=0; if((p2-1)=='\\') (p2-1)=0; p2++=0; _output_(ps); ps=p2;
		449	instex_usedynamic=1; insmath(p1+2);
		450	}
		451	if(*ps) _output_(ps); instex_usedynamic=dynsave;
		452	}
		453	else _output_(buf);
		454	}
		455
		456	/* Output routine */
		457	void output(char *s,...)
		458	{
		459	va_list vp;
		460	char buf[4*MAX_LINELEN+1];
		461
		462	va_start(vp,s);
		463	vsnprintf(buf,sizeof(buf),s,vp);
		464	va_end(vp);
		465	output0(buf);
		466	}
		467
		468	/* read in tmpf in tmp directory, and places in p.
		469	* Maximal length: MAX_LINELEN. */
		470	void read_tmp_file(char p, const char fname)
		471	{
		472	char name, pp;
		473	name=mkfname(NULL,"%s/%s",tmp_dir,fname);
		474	if(!exec_is_module \|\| !outputing \|\| !direct_exec
		475	\|\| strcmp(fname,"exec.out")!=0) {
		476	readfile(name,p,MAX_LINELEN);
		477	pp=getvar("wims_exec_dollar_double");
		478	if(pp && strcmp(pp,"yes")==0) {
		479	for(pp=strchr(p,'$'); pp; pp=strchr(pp+2,'$'))
		480	string_modify(p,pp,pp+1,"$$");
		481	}
		482	}
		483	else {
		484	char *s;
		485	s=readfile(name,NULL,OUTPUT_LENGTH_LIMIT);
		486	if(s==NULL) {*p=0; return;}
		487	if(memcmp(s,"Error: ", strlen("Error: "))==0) mystrncpy(p,s,MAX_LINELEN);
		488	output_length+=strlen(s);
		489	if(output_length>=OUTPUT_LENGTH_LIMIT) module_error("output_too_long");
		490	else _output_(s);
		491	free(s); *p=0;
		492	chmod(name,S_IRUSR\|S_IWUSR);
		493	}
		494	}
		495
		496	/* verify whether the module is trusted.
		497	* Returns 1 if yes, 0 if no. -1 for error. */
		498	int trusted_module(void)
		499	{
		500	char modname, w, buf[MAX_LINELEN+1];
		501	int i,n;
		502	static int _trusted=-1; /* avoid repeated computations */
		503
		504	if(untrust&255) return 0;
		505	if(_trusted>=0) return _trusted;
		506	modname=getvar(ro_name[ro_module]);
		507	if(modname==NULL \|\| *modname==0) return 0;
		508	if(memcmp(modname,"adm/",strlen("adm/"))==0 \|\|
		509	memcmp(modname,"classes/",strlen("classes/"))==0 \|\|
		510	strcmp(modname,home_module)==0 \|\|
		511	memcmp(modname,"help/",strlen("help/"))==0) {
		512	tr:
		513	if(memcmp(modname,"classes/",strlen("classes/"))==0)
		514	is_class_module=1;
		515	setenv("trusted_module","yes",1);
		516	return _trusted=1;
		517	}
		518	n=wordnum(trusted_modules); for(i=0;i<n;i++) {
		519	w=fnd_word(trusted_modules,i+1,buf);
		520	if(strcmp(w,modname)==0) goto tr;
		521	}
		522	return _trusted=0;
		523	}
		524
		525	/* file should be in the module directory, but
		526	* it may also be somewhere else.
		527	* buf[] requires MAX_FNAME+1 length.
		528	* Returns 0 if found. */
		529	int find_module_file(char *fname, char buf[], int mode)
		530	{
		531	char *p, dtest[32];
		532
		533	fname=find_word_start(fname);
		534	if(*fname==0) return -1;
		535	/* Name checking: no directory backtracing. */
		536	if(strstr(fname,parent_dir_string)!=NULL) {
		537	setvar(error_data_string,fname); module_error("illegal_fname");
		538	return -1;
		539	}
		540	p=strchr(fname,'/'); if(p==NULL \|\| p>fname+10) goto openit;
		541	memmove(dtest,fname,p-fname); dtest[p-fname]=0;
		542	if(strcmp(dtest,"datamodule")==0) {
		543	mkfname(buf,"modules/data%s",p); goto lastopen;
		544	}
		545	if(strcmp(dtest,"wimshome")==0 && trusted_module()) {
		546	mkfname(buf,"%s%s",getvar("wims_home"),p); goto lastopen;
		547	}
		548	if(strcmp(dtest,"writable")==0) {
		549	if(strncmp(p+1,"TEMP_",5)==0 && strchr(p+1,'/')==NULL) {
		550	mkfname(buf,"%s/%s",tmp_dir,p+1);
		551	}
		552	else {
		553	mkfname(buf,"w/%s/%s",module_prefix,p+1);
		554	}
		555	untrust\|=4;
		556	}
		557	else {
		558	openit: mkfname(buf,"%s/%s",module_prefix,fname);
		559	}
		560	if(mode) return 0;
		561	if(ftest(buf)!=is_file) {
		562	if(lastftype==is_exec) {
		563	isexec:
		564	setvar("executable",fname); module_error("executable");
		565	return -1;
		566	}
		567	if(strncmp(fname,"adm/",4)==0 &&
		568	(!trusted_module() \|\| is_class_module)) return -1;
		569	mkfname(buf,"scripts/%s",fname);
		570	lastopen:
		571	if(mode) return 0;
		572	if(ftest(buf)!=is_file) {
		573	if(lastftype==is_exec) goto isexec;
		574	else return -1;
		575	}
		576	}
		577	return 0;
		578	}
		579
		580	/* check whether a file is user-submitted */
		581	/* This is deplecated because of the wimshome/ method. */
		582	/* int user_file(char *name) {
		583	if(name[0]=='/' \|\| name[0]=='.' \|\|
		584	strstr(name,"classes/")!=NULL \|\|
		585	strstr(name,"forums/")!=NULL \|\|
		586	strstr(name,"sessions/")!=NULL \|\|
		587	strstr(name,"doc/")!=NULL) return 1; else return 0;
		588	} */
		589
		590	/* returns 1 if violation */
		591	int datafile_check(char *name) {
		592	if((untrust&255)==0) return 0;
		593	if(strncmp(name,"data/",strlen("data/"))==0) return 0;
		594	if(strncmp(name,"authors/",strlen("authors/"))==0) return 0;
5333	bpr	595	if(strncmp(name,"datamodule/",strlen("datamodule/"))==0) return 0;
10	reyssat	596	return 1;
		597	}
		598
		599	/* returns 0 if success */
		600	void readdatafile(char *name)
		601	{
		602	char *pp;
		603	if(strcmp(name,lastdatafile)==0) return;
		604	lastdata[0]=0; readfile(name,lastdata,WORKFILE_LIMIT);
		605	mystrncpy(lastdatafile,name,sizeof(lastdatafile));
		606	datacache[0]=lastdata; nextdatacache=1;
		607	if(lastdata[0]==tag_string[1]) {
		608	datacache[1]=lastdata; nextdatacache++;
		609	}
		610	pp=strstr(lastdata,tag_string);
		611	if(pp) datacache[nextdatacache]=pp;
		612	else datacache[nextdatacache]=lastdata+strlen(lastdata);
		613	}
		614
		615	char _nextdata(char p)
		616	{
		617	char *pp;
		618	if(!*p) return p;
		619	pp=strstr(p,tag_string);
		620	if(pp) return pp;
		621	else return p+strlen(p);
		622	}
		623
		624	/* datafile structure: number of records.
		625	* tag=1 if direct access */
		626	unsigned int datafile_recordnum(char *p)
		627	{
		628	char nbuf[MAX_LINELEN+1], *pp;
		629	int i, t, ret;
		630
		631	t=untrust; ret=0;
		632	if(direct_datafile) mystrncpy(nbuf,p,sizeof(nbuf));
		633	else if(datafile_check(p)!=0 \|\| find_module_file(p,nbuf,0)) goto ret;
		634	readdatafile(nbuf);
		635	for(i=nextdatacache, pp=datacache[i]; *pp;) {
		636	pp=_nextdata(pp+1); i++;
		637	if(i<DATAFIELD_LIMIT) {
		638	datacache[i]=pp; nextdatacache=i;
		639	}
		640	}
		641	ret=i-1;
		642	ret:
		643	untrust=t;
		644	return ret;
		645	}
		646
		647	/* datafile structure: find record n, starting from 1 */
		648	char datafile_fnd_record(char p, int n, char bf[])
		649	{
		650	char nbuf[MAX_LINELEN+1], pp, p2;
		651	int i, t;
		652
		653	bf[0]=0; t=untrust;
		654	if(n<0) goto ret;
		655	if(direct_datafile) mystrncpy(nbuf,p,sizeof(nbuf));
		656	else if(datafile_check(p)!=0 \|\| find_module_file(p,nbuf,0)) goto ret;
		657	readdatafile(nbuf); if(*lastdata==0) goto ret;
		658	if(n>nextdatacache) {
		659	for(i=nextdatacache, pp=datacache[i]; i<n && *pp;) {
		660	pp=_nextdata(pp+1); i++;
		661	if(i<DATAFIELD_LIMIT) {
		662	datacache[i]=pp; nextdatacache=i;
		663	}
		664	}
		665	}
		666	else pp=datacache[n];
		667	if(!*pp) goto ret;
		668	if(n>1 \|\| (n==1 && *pp!=tag_string[1])) pp+=strlen(tag_string);
		669	else if(n==1) pp+=strlen(tag_string)-1;
		670	if(n<nextdatacache) p2=datacache[n+1];
		671	else {
		672	p2=strstr(pp,tag_string); if(p2==NULL) p2=pp+strlen(pp);
		673	if(n<DATAFIELD_LIMIT-1 && n==nextdatacache) {
		674	nextdatacache++; datacache[nextdatacache]=p2;
		675	}
		676	}
		677	if(p2-pp>=MAX_LINELEN) p2=pp+MAX_LINELEN-1;
		678	if(p2<pp) p2=pp;
		679	memmove(bf,pp,p2-pp); bf[p2-pp]=0;
		680	ret:
		681	untrust=t; return bf;
		682	}
		683
		684	char hex2char(char c1, char c2)
		685	{
		686	char tbuf[16];
		687	if(c1<'0' \|\| c1>'f' \|\| c2<'0' \|\| c2>'f') {
		688	invl:
		689	snprintf(tbuf,sizeof(tbuf),"%%%c%c",c1,c2);
		690	setvar(error_data_string,tbuf);
		691	user_error("invalid_char_in_query_string");
		692	}
		693	c1=toupper(c1);c2=toupper(c2);
		694	if(c1>'9' && c1<'A') goto invl;
		695	if(c2>'9' && c2<'A') goto invl;
		696	if(c1>'F' \|\| c2>'F') goto invl;
		697	if(c1>='A') c1=c1-'A'+'9'+1;
		698	if(c2>='A') c2=c2-'A'+'9'+1;
		699	return (c1-'0')*16+c2-'0';
		700	}
		701
		702	/* Converts back http escaped chars, slight. Does not check buffer length.
		703	* Returns converted string length. */
		704	int _http2env(char outs[], char ins[])
		705	{
		706	int j,k,l;
		707	l=strlen(ins);
		708	for(j=k=0;j<l && !isspace(ins[j]);j++,k++) {
		709	if(isspace(ins[j])) { /* skip space characters in query string */
		710	k--;continue;
		711	}
		712	if(ins[j]=='%') {
		713	/* skip Carriage-Return. */
		714	if(ins[j+1]=='0' && (ins[j+2]=='d' \|\| ins[j+2]=='D')) {
		715	j+=2; k--; continue;
		716	}
		717	outs[k]=hex2char(ins[j+1],ins[j+2]);
		718	j+=2; continue;
		719	}
		720	outs[k]=ins[j];
		721	}
		722	outs[k]=0;
		723	return k;
		724	}
		725
		726	/* Converts back http escaped chars. Does not check buffer length.
		727	* Returns converted string length. */
		728	int http2env(char outs[], char ins[])
		729	{
		730	int j,k,l;
		731	l=strlen(ins);
		732	for(j=k=0;j<l && !isspace(ins[j]);j++,k++) {
		733	if(isspace(ins[j])) { /* skip space characters in query string */
		734	k--;continue;
		735	}
		736	if(ins[j]=='%') {
		737	/* skip Carriage-Return. */
		738	if(ins[j+1]=='0' && (ins[j+2]=='d' \|\| ins[j+2]=='D')) {
		739	j+=2; k--; continue;
		740	}
		741	outs[k]=hex2char(ins[j+1],ins[j+2]);
		742	j+=2; continue;
		743	}
		744	if(ins[j]=='+') {
		745	outs[k]=' '; continue;
		746	}
		747	if(ins[j]=='?' \|\| ins[j]=='&') {
		748	outs[k]=0; continue;
		749	}
		750	outs[k]=ins[j];
		751	}
		752	outs[k]=0;
		753	return k;
		754	}
		755
		756	/* translate a string to http querystring style.
		757	* '&' is not translated.
		758	* Buffer p must be at least MAX_LINELEN. */
		759	void tohttpquery(char *p)
		760	{
		761	char trlist[]=" ()[]{}+-*^\|/\"\'!:;,<>\n";
		762	char *pp;
		763	for(pp=p;*pp;pp++) {
		764	if(*pp==' ') {
		765	*pp='+'; continue;
		766	}
		767	if(strchr(trlist,*pp)==NULL) continue;
		768	if(pp=='+' && pp>p && (pp-1)=='&') continue;
		769	if(pp>p && *(pp-1)=='\\') {
3718	reyssat	770	ovlstrcpy(pp-1,pp);pp--;continue;
10	reyssat	771	}
		772	if(*pp=='\n') {
		773	string_modify(p,pp,pp+1,"%%0D%%0A");pp+=5;
		774	}
		775	else {
		776	string_modify(p,pp,pp+1,"%%%02X",*pp);pp+=2;
		777	}
		778	}
		779	}
		780
		781	/* substitute backslash parameters. Internal use only. */
		782	void slashsubst(char *p)
		783	{
		784	char p1, p2, pt, pp, namebuf[128];
		785	int n;
		786
		787	n=strlen(mathfont_prefix); memmove(namebuf,mathfont_prefix,n+1);
		788	for(p1=strchr(p,'\\'); p1!=NULL; p1=strchr(p1,'\\')) {
		789	p1++; for(p2=p1; myisalnum(p2) \|\| p2=='_'; p2++);
		790	if(p2<=p1 \|\| p2>p1+100) continue;
		791	memmove(namebuf+n,p1,p2-p1); namebuf[p2-p1+n]=0;
		792	pt=_getvar(namebuf); if(pt==NULL) continue;
		793	if(*p2=='[' && (pp=find_matching(p2+1,']'))!=NULL) {
		794	string_modify(p,pp+1,pp+1,")");
		795	string_modify(p,p1-1,p1,"$(%s",mathfont_prefix);
		796	}
		797	else string_modify(p,p1-1,p1,"$%s",mathfont_prefix);
		798	}
		799	}
		800
		801	/* two alarm handlers. */
		802	void alarm1(int s)
		803	{
		804	if(killpid>0 && kill(killpid,SIGKILL)) module_error("timeup");
		805	killpid=0;
		806	}
		807
		808	void alarm2(int s)
		809	{
		810	cleantmpdir();
		811	alarm1(s); module_error("timeup");
		812	}
		813
		814	void finalalarm(void)
		815	{
		816	time_t curr;
		817	curr=time(0);
		818	if(curr>=limtime) alarm2(SIGALRM);
		819	errno=0;
		820	if(signal(SIGALRM,alarm2)==SIG_ERR)
		821	internal_error(strerror(errno));
		822	alarm(limtime-curr+1);
		823	}
		824
		825	void initalarm(void)
		826	{
		827	limtimex=nowtime+4*rlimit_cpu/3;
		828	limtime=limtimex+2; finalalarm();
		829	}
		830
		831	void forkalarm(void)
		832	{
		833	time_t curr;
		834	curr=time(0);
		835	if(curr>=limtimex) {alarm1(SIGALRM); return;}
		836	if(signal(SIGALRM,alarm1)==SIG_ERR)
		837	internal_error(strerror(errno));
		838	alarm(limtimex-curr+1);
		839	}
		840
		841	/* create pid tag */
		842	void create_pid(void)
		843	{
		844	char buf[MAX_FNAME+1], pbuf[256], obuf[MAX_FNAME+1];
		845	struct stat dst;
		846	struct utimbuf ub;
		847
		848	if(robot_access \|\| *session_prefix==0) return;
		849	if(cmd_type==cmd_getframe) return;
		850	mkfname(buf,"%s/.pid",s2_prefix);
		851	/* another process running? */
		852	if(readfile(buf,pbuf,sizeof(pbuf))!=NULL) {
		853	mkfname(obuf,"/proc/%s",pbuf);
		854	if(stat(obuf,&dst)==0) user_error("double_click");
		855	}
		856	snprintf(pidbuf,sizeof(pidbuf),"%u",getpid());
		857	accessfile(pidbuf,"w","%s",buf);
		858	/* Touch session time */
		859	if(strstr(session_prefix,"sessions/")==NULL) return;
		860	ub.actime=ub.modtime=nowtime;
		861	utime(session_prefix,&ub);
		862	if(strchr(session_prefix,'_')!=NULL) { /* touch parent too */
		863	char sbuf[MAX_FNAME+1], *p;
		864	mystrncpy(sbuf,session_prefix,sizeof(sbuf));
		865	p=strchr(sbuf,'_'); if(p!=NULL) *p=0;
		866	utime(sbuf,&ub);
		867	}
		868	}
		869
		870	struct {
		871	char cmd[MAX_EXEC_NAME+1];
		872	unsigned int fd1, fd2;
		873	int pipe_stdin[2];
		874	int pipe_stdout[2];
		875	int pipe_stderr[2];
		876	} mxtab[MAX_MULTIEXEC];
		877	int mxno=0;
		878
		879	int execredirected(char cmdf, char inf, char outf, char errf, char *arg[])
		880	{
		881	pid_t pid;
		882	int status, t;
		883
		884	if(robot_access) return 0;
		885	if(time(0)>=limtimex) {
		886	if(errf!=NULL)
		887	accessfile("No time left to execute subprograms.\n","w","%s",errf);
		888	return -100;
		889	}
		890	lastdatafile[0]=lastftest[0]=0;
		891	fflush(NULL); /* flush all output streams before forking
		892	* otherwise they will be doubled */
		893	pid=fork(); if(pid==-1) return -1;
		894	if(!pid) { /* child */
		895	char buf[MAX_LINELEN+1]; int k;
3843	kbelabas	896	(void)nice(10); /* lower priority for children */
10	reyssat	897	if(is_multiexec) {
		898	dup2(mxtab[multiexec_index].pipe_stdin[0],0);
		899	dup2(mxtab[multiexec_index].pipe_stdout[1],1);
		900	dup2(mxtab[multiexec_index].pipe_stderr[1],2);
		901	}
		902	else {
3843	kbelabas	903	if(inf!=NULL) (void)freopen(inf,"r",stdin);
		904	if(outf!=NULL) (void)freopen(outf,"w",stdout);
		905	if(errf!=NULL) (void)freopen(errf,"w",stderr);
10	reyssat	906	}
		907	/* This is to patch LinuxPPC uid wrapping
		908	* for scripts */
		909	t=0; if(strchr(cmdf,'/')) {
		910	int tf;
		911	char tbuf[16];
3843	kbelabas	912	tf=open(cmdf,O_RDONLY); (void)read(tf,tbuf,8); close(tf);
10	reyssat	913	if(memcmp(tbuf+1,"ELF",3)!=0) t=1;
		914	}
		915	if(wrapexec==-1) {
		916	setreuid(getuid(),getuid());setregid(getgid(),getgid());
		917	}
		918	if(wrapexec==1 \|\| (t==1 && wrapexec==0)) {
		919	setreuid(geteuid(),geteuid());setregid(getegid(),getegid());
		920	}
		921	errno=0;
		922	if(strchr(cmdf,'/')) execve(cmdf,arg,environ);
		923	else execvp(cmdf,arg);
		924	snprintf(buf,sizeof(buf),"Failed to execute");
		925	for(k=0;arg[k];k++) {
		926	t=strlen(buf);
		927	snprintf(buf+t,sizeof(buf)-t," %s",arg[k]);
		928	}
		929	t=strlen(buf);
		930	snprintf(buf+t,sizeof(buf)-t,"\n %s\n",strerror(errno));
		931	accessfile(buf,"a","%s/exec.fail",tmp_dir);
		932	exit(127);
		933	}
		934	else { /* parent */
		935	wrapexec=0; status=0;
		936	if(exec_wait && !is_multiexec) {
		937	killpid=pid; forkalarm();
		938	waitpid(pid,&status,0); killpid=0; finalalarm();
		939	}
		940	return WEXITSTATUS(status);
		941	}
		942	}
		943
		944	/* preparation for resident execution.
		945	* Returns 1 if already up, otherwise 0. */
		946	int multiexec(char cmd, char *abuf)
		947	{
		948	char *p;
		949	int i;
		950
		951	if(robot_access) return 0;
		952	if(strstr(tmp_dir,"sessions/")==NULL) return 0;
		953	if(strstr(tmp_debug,"yes")!=NULL && checkhost(manager_site)>=1)
		954	setenv("multiexec_debug","yes",1);
		955	p=getvar("wims_multiexec");
		956	if(p==NULL \|\| wordchr(p,cmd)==NULL) return 0; /* not allowed */
		957	if(!multiexec_random[0]) {
		958	snprintf(multiexec_random, sizeof(multiexec_random),
		959	"%lX%lX%lX%lX%lX%lX%lX%lX",
		960	random(),random(),random(),random(),
		961	random(),random(),random(),random());
		962	setenv("multiexec_random",multiexec_random,1);
		963	}
		964	for(i=0;i<mxno && strcmp(cmd,mxtab[i].cmd)!=0; i++);
		965	multiexec_index=i;
		966	if(i==mxno) {
		967	if(mxno>=MAX_MULTIEXEC) return 0;
		968	if(pipe(mxtab[i].pipe_stdin)<0) return 0;
		969	if(pipe(mxtab[i].pipe_stdout)<0) return 0;
		970	if(pipe(mxtab[i].pipe_stderr)<0) return 0;
		971	mystrncpy(mxtab[i].cmd,cmd,sizeof(mxtab[i].cmd));
		972	mxno++; is_multiexec=1;
		973	exportall(); setenv("wims_exec_parm",multiexec_random,1);
		974	execredirected(abuf[0],NULL,NULL,NULL,abuf);
		975	}
		976	is_multiexec=0;
		977	return 1;
		978	}
		979
		980	/* my system(), but with variable parms
		981	* More secure than system(), and direct fork. */
		982	int call_ssh(char *s,...)
		983	{
		984	va_list vp;
		985	char buf[MAX_LINELEN+1];
		986	char *arg[1024];
		987	char inf=NULL, outf=NULL, *errf=NULL;
		988	char cmdf, p, *p2;
		989	int i, d;
		990
		991	if(robot_access) return 0;
		992	va_start(vp,s);
		993	vsnprintf(buf,sizeof(buf),s,vp);
		994	va_end(vp);
		995	p=find_word_start(buf); if(*p==0) return 0;
		996	cmdf=p;
		997	for(i=0;*p!=0 && i<1000; p=find_word_start(p2)) {
		998	switch(*p) {
		999	case '\'': {
		1000	p++; p2=strchr(p,'\''); if(p2==NULL) p2=p+strlen(p);
		1001	d=0; break;
		1002	}
		1003	case '"': {
		1004	p++; p2=strchr(p,'"'); if(p2==NULL) p2=p+strlen(p);
		1005	d=0; break;
		1006	}
		1007	default: d=1; p2=find_word_end(p); break;
		1008	}
		1009	if(p2) p2++=0;
		1010	if(!d) {arg[i++]=p; continue;}
		1011	switch(*p) {
		1012	case '<': inf=++p; break;
		1013	case '>': {
		1014	p++; if(*p=='&') {
		1015	merge: p++; errf=outf=p; break;
		1016	}
		1017	else outf=p;
		1018	break;
		1019	}
		1020	case '&': {
		1021	p++; if(*p=='>') goto merge;
		1022	else break;
		1023	}
		1024	case '2': {
		1025	if(*(p+1)=='>') {errf=p+2; break;}
		1026	}
		1027	default: arg[i++]=p; break;
		1028	}
		1029	}
		1030	arg[i]=NULL;
		1031	return execredirected(cmdf,inf,outf,errf,arg);
		1032	}
		1033
		1034	/* Read/write to a file with variable parms to print filename */
		1035	void accessfile(char content, char type, char *s,...)
		1036	{
		1037	va_list vp;
		1038	char buf[MAX_FNAME+1];
		1039	int fd;
		1040
		1041	if(robot_access) return;
		1042	va_start(vp,s);
		1043	vsnprintf(buf,sizeof(buf),s,vp);
		1044	va_end(vp);
		1045	if(strlen(buf)>=MAX_FNAME-1) nametoolong(buf);
		1046	switch(*type) {
		1047	case 'r': readfile(buf,content,MAX_LINELEN); return;
		1048	case 'e': readfile(buf,content,MAX_LINELEN/4); return; /* limited read */
		1049	case 'w': fd=creat(buf,S_IRUSR\|S_IWUSR\|S_IRGRP\|S_IROTH); break;
		1050	case 'a': fd=open(buf,O_WRONLY\|O_CREAT\|O_APPEND,S_IRUSR\|S_IWUSR\|S_IRGRP\|S_IROTH); break;
		1051	default : return;
		1052	}
		1053	lastdatafile[0]=lastftest[0]=0;
		1054	if(fd==-1) return;
3843	kbelabas	1055	(void)write(fd,content,strlen(content)); close(fd);
10	reyssat	1056	}
		1057
		1058	/* system(), but with variable parms
		1059	* Uses sh to execute command. */
		1060	int call_sh(char *s,...)
		1061	{
		1062	va_list vp;
		1063	char buf[MAX_LINELEN+1];
		1064	char *abuf[8];
		1065
		1066	if(robot_access) return 0;
		1067	va_start(vp,s);
		1068	vsnprintf(buf,sizeof(buf),s,vp);
		1069	va_end(vp);
		1070	abuf[0]="sh"; abuf[1]="-c"; abuf[2]=buf; abuf[3]=NULL;
		1071	return execredirected(abuf[0],NULL,NULL,NULL,abuf);
		1072	}
		1073
		1074	void _getdef(char buf[], char *name, char value[])
		1075	{
		1076	char p1, p2, p3, p4;
		1077
		1078	if(name==0) goto nothing; / this would create segfault. */
		1079	for(p1=strstr(buf,name); p1!=NULL; p1=strstr(p1+1,name)) {
		1080	p2=find_word_start(p1+strlen(name));
		1081	if((p1>buf && !isspace((p1-1))) \|\| p2!='=') continue;
		1082	p3=p1; while(p3>buf && *(p3-1)!='\n') p3--;
		1083	p3=find_word_start(p3);
		1084	if(p3<p1 && *p3!='!') continue;
		1085	if(p3<p1) {
		1086	p3++; p4=find_word_end(p3);
		1087	if(find_word_start(p4)!=p1) continue;
		1088	if(p4-p3!=3 \|\| (strncmp(p3,"set",3)!=0 &&
		1089	strncmp(p3,"let",3)!=0 &&
		1090	strncmp(p3,"def",3)!=0)) {
		1091	if(p4-p3!=6 \|\| strncmp(p3,"define",6)!=0) continue;
		1092	}
		1093	}
		1094	p2++;p3=strchr(p2,'\n'); if(p3==NULL) p3=p2+strlen(p2);
		1095	p2=find_word_start(p2);
		1096	if(p2>p3) goto nothing;
		1097	if(p3-p2>=MAX_LINELEN) user_error("cmd_output_too_long");
		1098	memmove(value,p2,p3-p2); value[p3-p2]=0;
		1099	strip_trailing_spaces(value); return;
		1100	}
		1101	nothing:
		1102	value[0]=0; return;
		1103	}
		1104
		1105	/* Get variable definition from a file.
		1106	* Result stored in buffer value of length MAX_LINELEN. */
		1107	void getdef(char fname, char name, char value[])
		1108	{
		1109	char buf[MAX_LINELEN+1], tbuf[MAX_LINELEN+1], nbuf[MAX_NAMELEN+1];
		1110	char p1, p2;
		1111
		1112	value[0]=0; if(readfile(fname,buf,sizeof(buf)-16)==NULL) return;
		1113	mystrncpy(value,name,MAX_LINELEN);
		1114	for(p1=value; *p1; p1=p2) {
		1115	while(p1 && !myisalnum(p1) && *p1!='_') p1++;
		1116	if(*p1==0) break;
		1117	for(p2=p1; myisalnum(p2) \|\| p2=='_'; p2++);
		1118	if(p2-p1>MAX_NAMELEN) continue;
		1119	memmove(nbuf,p1,p2-p1); nbuf[p2-p1]=0;
		1120	_getdef(buf,nbuf,tbuf);
		1121	string_modify(value,p1,p2,"%s",tbuf);
		1122	p2=p1+strlen(tbuf);
		1123	}
		1124	}
		1125
		1126	int _setdef_changed;
		1127
		1128	void _setdef(char buf[], char name, char value)
		1129	{
		1130	char p1, p2, *p3;
		1131	int n;
		1132
		1133	for(p1=strstr(buf,name); p1!=NULL; p1=strstr(p1+1,name)) {
		1134	p2=find_word_start(p1+strlen(name));
		1135	if((p1>buf && !isspace((p1-1))) \|\| p2!='=') continue;
		1136	p3=p1; while(p3>buf && *(p3-1)==' ') p3--;
		1137	if(p3>buf && *(p3-1)!='\n') continue;
		1138	p2++;p3=strchr(p2,'\n'); if(p3==NULL) p3=p2+strlen(p2);
		1139	if(strlen(value)!=p3-p2 \|\| strncmp(value,p2,p3-p2)!=0) {
		1140	string_modify(buf,p2,p3,"%s",value);
		1141	_setdef_changed++;
		1142	}
		1143	return;
		1144	}
		1145	n=strlen(buf);
		1146	if(n>0 && buf[n-1]!='\n')
		1147	snprintf(buf+n,MAX_LINELEN-n,"\n%s=%s\n",name,value);
		1148	else
		1149	snprintf(buf+n,MAX_LINELEN-n,"%s=%s\n",name,value);
		1150	_setdef_changed++;
		1151	}
		1152
		1153	/* Set variable definition to a file. */
		1154	void setdef(char fname, char name)
		1155	{
		1156	char buf[MAX_LINELEN+1];
		1157	char p1, p2, *p3;
		1158
		1159	_setdef_changed=0;
		1160	if(strchr(name,'=')==NULL) return;
		1161	for(p1=name;*p1;p1++) {
		1162	if(isspace(p1) && p1!=' ' && p1!='\n') p1=' ';
		1163	if(*p1==' ') {
		1164	for(p2=p1+1; isspace(p2) && p2!='\n'; p2++);
3718	reyssat	1165	if(p2>p1+1) ovlstrcpy(p1+1,p2);
		1166	p2=p1+1; if(p2=='=' \|\| p2=='\n') ovlstrcpy(p1,p2);
10	reyssat	1167	}
		1168	}
		1169	if(readfile(fname,buf,sizeof(buf))==NULL) buf[0]=0;
		1170	for(p1=find_word_start(name); p1!=NULL; p1=p2) {
		1171	p2=strchr(p1,'\n'); if(p2!=NULL) *p2++=0;
		1172	p1=find_word_start(p1);
		1173	p3=strchr(p1,'='); if(p3==NULL) continue;
		1174	*p3++=0; p3=find_word_start(p3);
		1175	_setdef(buf,p1,p3);
		1176	}
		1177	if(_setdef_changed) accessfile(buf,"w","%s",fname);
		1178	}
		1179
		1180	/* check whether connecting host is part of given list.
		1181	* Returns 0 if no, 1 if yes. */
		1182	int checkhost(char *hlist)
		1183	{
		1184	char buf[MAX_LINELEN+1];
		1185	char lbuf[1024], hbuf1[256], hbuf2[256];
		1186	char p1, p2, pb, pe, *pp;
		1187
		1188	if(*remote_addr==0) return 0;
		1189	snprintf(hbuf1,sizeof(hbuf1),"+%s+",remote_addr);
		1190	if(*remote_host!=0) {
		1191	snprintf(hbuf2,sizeof(hbuf2),"+%s+",remote_host);
		1192	for(p1=hbuf2; p1; p1++) p1=tolower(*p1);
		1193	}
		1194	else hbuf2[0]=0;
		1195	mystrncpy(buf,find_word_start(hlist),sizeof(buf)); strip_trailing_spaces(buf);
		1196	for(p1=buf; *p1; p1++) {
		1197	p1=tolower(p1);
		1198	if(!myisalnum(p1) && strchr(".-_",p1)==NULL) *p1=' ';
		1199	}
		1200	if(strcmp(buf,"all")==0) return 1; /* all is all */
		1201	for(p1=find_word_start(buf); *p1; p1=find_word_start(p2)) {
		1202	p2=find_word_end(p1); if(p2) p2++=0;
		1203	if(p2-p1<3) continue;
		1204	if(myisalnum(*p1)) pb="+"; else pb="";
		1205	if(myisalnum(*(p2-1))) pe="+"; else pe="";
		1206	snprintf(lbuf,sizeof(lbuf),"%s%s%s",pb,p1,pe);
		1207	for(pp=p1; pp && (myisdigit(pp) \|\| *pp=='.'); pp++);
		1208	if(pp) pp=hbuf2; / host name */
		1209	else pp=hbuf1; /* ip number */
		1210	if(strstr(pp,lbuf)!=NULL) return 1; /* found */
		1211	}
		1212	return 0;
		1213	}
		1214
		1215	/* return 1 if a word of bf2 is a substring of host.
		1216	* Like checkhost, but with time check.
		1217	* The content of bf2[] is destroyed. */
		1218	int checkhostt(char bf2[])
		1219	{
		1220	char p1, p2, *p3;
		1221	/* compare with starting time */
		1222	for(p1=strchr(bf2,'>'); p1!=NULL; p1=strchr(p1+1,'>')) {
		1223	if(p1>bf2 && !isspace(*(p1-1))) continue;
		1224	p3=find_word_start(++p1); p2=find_word_end(p3);
		1225	if(p2-p3!=14) continue;
		1226	p3[8]='.'; p3[11]=':'; if(p2) p2++=0;
		1227	if(strncmp(nowstr,p3,14)<0) return 0;
3718	reyssat	1228	ovlstrcpy(p1-1,p2); p1-=2;
10	reyssat	1229	}
		1230	/* compare with ending time */
		1231	for(p1=strchr(bf2,'<'); p1!=NULL; p1=strchr(p1+1,'<')) {
		1232	if(p1>bf2 && !isspace(*(p1-1))) continue;
		1233	p3=find_word_start(++p1); p2=find_word_end(p3);
		1234	if(p2-p3!=14) continue;
		1235	p3[8]='.'; p3[11]=':'; if(p2) p2++=0;
		1236	if(strncmp(nowstr,p3,14)>0) return 0;
3718	reyssat	1237	ovlstrcpy(p1-1,p2); p1-=2;
10	reyssat	1238	}
		1239	p1=find_word_start(bf2); if(*p1==0) return 1;
		1240	return checkhost(p1);
		1241	}
		1242
		1243	/* bad identification */
		1244	void bad_ident(void)
		1245	{
		1246	if(cookiegot[0]!=0) {
		1247	}
		1248	user_error("bad_ident");
		1249	}
		1250
		1251	void instex_flush(void)
		1252	{
		1253	char *p;
		1254	setenv("texgif_style","",1);
		1255	setenv("texgif_tmpdir",tmp_dir,1);
		1256	setenv("texgif_src",instex_src,1);
		1257	setenv("texgif_outfile",instex_fname,1);
		1258	unsetenv("w_instex_color");
		1259	getwimstexsize=0; fix_tex_size(); getwimstexsize=1;
		1260	for(p=instex_fname;p;p++) if(p=='\n') *p=' ';
		1261	wrapexec=0; call_ssh("%s/%s >%s/ins.Out 2>%s/ins.Err",
		1262	bin_dir,instex_processor,
		1263	tmp_dir,tmp_dir);
		1264	call_ssh("mv %s %s >/dev/null 2>/dev/null", instex_fname,s2_prefix);
		1265	instex_src[0]=instex_fname[0]=0; instex_cnt=0;
		1266	}
		1267
		1268	/* put last.phtml */
		1269	void putlastout(void)
		1270	{
		1271	int t;
		1272	if(instex_cnt>0) instex_flush();
		1273	t=catfile(stdout,"%s/%s",s2_prefix,lastout);
		1274	if(t==0) printf("Content-type: text/plain\r\n\r\n");
		1275	}
		1276
		1277	struct sockaddr_un sun;
		1278
		1279	/* returns >=0 if OK. */
		1280	int kerneld(char *p, int bufsize)
		1281	{
		1282	int sock, s, t, t1, l, *ip;
		1283	struct timeval tv;
		1284	fd_set rset;
		1285
		1286	sock=socket(PF_UNIX,SOCK_STREAM,0);
		1287	s=connect(sock,(const struct sockaddr *)&sun,sizeof(sun));
		1288	if(s) {bad: close(sock); return -1;}
		1289	ip=(int *) p;
		1290	l=strlen(p+sizeof(int)); *ip=l;
		1291	s=write(sock,p,l+sizeof(int)); if(s!=l+sizeof(int)) goto bad;
		1292	for(t=0, l=bufsize-1; t<l+sizeof(int);) {
		1293	tv.tv_sec=2; tv.tv_usec=0;
		1294	FD_ZERO(&rset); FD_SET(sock,&rset);
		1295	if(select(sock+1,&rset,NULL,NULL,&tv)<=0) goto bad;
		1296	t1=read(sock,p+t,l-t);
		1297	if(t1+t<sizeof(int)) goto bad;
		1298	l=*ip; if(l<=0) goto bad;
		1299	if(l>=bufsize-sizeof(int)-4) user_error("cmd_output_too_long");
		1300	t+=t1;
		1301	}
		1302	p[l+sizeof(int)]=0;
		1303	close(sock);
		1304	return l+sizeof(int);
		1305	}
		1306
		1307	void _daemoncmd(char *p)
		1308	{
		1309	char buf[MAX_LINELEN+1+sizeof(int)];
		1310	char p1, p2, *p3;
		1311	mystrncpy(buf+sizeof(int),p,sizeof(buf)-sizeof(int));
		1312	if(kerneld(buf,sizeof(buf))<0)
		1313	internal_error("Daemon communication error.");
		1314	p1=find_word_start(buf+sizeof(int));
		1315	p2=find_word_end(p1); if(p2) p2++=0;
		1316	if(strcmp(p1,"OK")==0) {
		1317	mystrncpy(p,p2,MAX_LINELEN); return;
		1318	}
		1319	p1=find_word_start(p2); p2=find_word_end(p1); if(p2) p2++=0;
		1320	p2=find_word_start(p2); p3=find_word_end(p2);
		1321	if(*p3) {
		1322	*p3++=0; p3=find_word_start(p3); strip_trailing_spaces(p3);
		1323	setvar("wims_error_data",p3);
		1324	}
		1325	switch(*p1) {
		1326	case '1': user_error(p2);
		1327	case '2': module_error(p2);
		1328	case '3':
		1329	default: internal_error(p2);
		1330	}
		1331	*p=0;
		1332	}
		1333

Subversion Repositories wimsdev

(root)/trunk/wims/src/lines.c – Rev 5333