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	*/
8185	bpr	17
8067	bpr	18	/* line input / output / translation routines
		19	* and error routines
		20	*/
8185	bpr	21	#include <utime.h>
		22	#include <sys/socket.h>
		23	#include <sys/un.h>
10	reyssat	24
8185	bpr	25	#include "wims.h"
		26
10	reyssat	27	int is_class_module=0;
		28
		29	int trusted_module(void);
		30	void phtml_put_base(char *fname,int cache);
		31	void module_error(char msg[]);
		32	void user_error(char msg[]);
		33	void accessfile(char content, char type, char *s,...);
		34	int remove_tree(char *p);
		35	void output(char *s,...);
		36	char _getvar(char vname);
		37	int checkhost(char *hlist);
		38
		39	char *lastdata;
		40	char lastdatafile[MAX_FNAME+1];
		41	char *datacache[DATAFIELD_LIMIT];
		42	int nextdatacache;
		43	struct stat ftst;
		44	char lastftest[MAX_FNAME+1];
		45	int lastftype;
		46	char outbuf[8192];
		47	char *outptr;
		48
8185	bpr	49	/* These modules can execute private programs.
		50	* adm/ modules are always trusted, so need no definition here.
		51	*/
10	reyssat	52	char *trusted_modules="";
8343	bpr	53	/* bit 0: module is not trusted.
		54	* bit 1: file in wimshome.
		55	* bit 2: readdef or file in writable directory.
		56	*/
10	reyssat	57	int untrust=0; /* non-zero if user detrusts the module. */
		58
		59	int error_status=0;
		60	char pidbuf[32];
		61
		62	void delete_pid(void);
		63
8343	bpr	64	/* Internal use only */
10	reyssat	65	void _debug(char *s,...)
		66	{
		67	va_list vp;
		68	char buf[MAX_LINELEN+1];
		69
		70	va_start(vp,s);
		71	vsnprintf(buf,sizeof(buf),s,vp);
		72	va_end(vp);
		73	setvar("debug",buf); module_error("debug");
		74	exit(1);
		75	}
		76
		77
8343	bpr	78	/* HTTP response header for non-processed CGI interface */
10	reyssat	79	void nph_header(int code)
		80	{
		81	char *cstr;
		82	switch(code) {
5505	bpr	83	case 200: cstr="OK"; break;
		84	case 301: cstr="Moved Permanently"; break;
		85	case 302: cstr="Moved Temporarily"; break;
		86	case 420: cstr="WIMS Nested Error"; break;
		87	case 450: cstr="WIMS User Error"; break;
		88	case 500: cstr="WIMS Internal Error"; break;
7646	bpr	89	case 550: cstr="WIMS Module Error"; break;
5505	bpr	90	default: cstr="ERROR"; break;
10	reyssat	91	}
		92	if(httpd_type!=httpd_wims) printf("Status: %d %s\r\n",code,cstr);
		93	else {
5505	bpr	94	char *p, tbuf[256];
		95	mystrncpy(tbuf,ctime(&nowtime),sizeof(tbuf));
		96	for(p=tbuf+strlen(tbuf);p>=tbuf && ((p-1)=='\n' \|\| (p-1)=='\r'); p--);
		97	*p=0;
		98	printf("HTTP/1.0 %d %s\r\n\
10	reyssat	99	Date: %s\r\n\
		100	Connection: close\r\n\
		101	",code,cstr,tbuf);
		102	}
		103	}
		104
		105	void flushoutput(void)
		106	{
		107	int l2;
		108	if(outptr<=outbuf) return;
		109	l2=outptr-outbuf;
3843	kbelabas	110	if(lastout_file!=-1) (void)write(lastout_file,outbuf,l2);
10	reyssat	111	else fwrite(outbuf,l2,1,stdout);
		112	outptr=outbuf;
		113	}
		114
		115	void internal_warn(char msg[])
		116	{
		117	char buf[1024];
		118	fprintf(stderr,"wims: %s\n%s\n",msg,strerror(errno));
		119	snprintf(buf,sizeof(buf),"%s: %s\n",nowstr,msg);
		120	accessfile(buf,"a","%s/internal_error.log",log_dir);
		121	}
		122
8343	bpr	123	/* Internal error: panic and forget about requester. */
10	reyssat	124	void internal_error(char msg[])
		125	{
		126	if(error_status<2) {
5505	bpr	127	nph_header(500);
		128	printf("Cache-Control: no-cache\nPragma: no-cache\r\n\
10	reyssat	129	Content-type: text/plain\r\n\r\n\r\n\
		130	WIMS panick! %s\n%s\n",msg,strerror(errno));
5505	bpr	131	error_status=2; internal_warn(msg);
10	reyssat	132	}
		133	delete_pid(); exit(1);
		134	}
		135
		136	void tex_nospace(char *p)
		137	{
		138	char p1, p2;
		139	char buf[MAX_LINELEN+1];
		140	for(p1=buf,p2=p;*p2 && p1-buf<MAX_LINELEN-4;p2++) {
5505	bpr	141	if(!isspace(p2)) {p1++=*p2;continue;}
		142	while(isspace(*p2)) p2++;
7646	bpr	143	if(*(p1-1)=='\\' \|\|
5505	bpr	144	(p1>buf && myisalnum((p1-1)) && myisalnum(p2)))
		145	*p1++=' ';
		146	p1++=p2;
10	reyssat	147	}
		148	*p1++=0; memmove(p,buf,p1-buf);
		149	}
		150
		151	void nametoolong(char *p)
		152	{
		153	char buf[MAX_FNAME+17];
		154	snprintf(buf,sizeof(buf),"%s...",p);
		155	force_setvar("wims_error_data",buf);
		156	module_error("file_name_too_long");
		157	}
		158
		159	off_t ftest_size;
		160
8343	bpr	161	/* A simple front-end of stat(). */
10	reyssat	162	int ftest(char *fname)
		163	{
		164	if(strcmp(fname,lastftest)==0) return lastftype;
		165	/* if(fname[0]=='/' \|\| fname[0]=='.') fprintf(stderr,"ftest: %s\n",fname); */
		166	mystrncpy(lastftest,fname,sizeof(lastftest));
		167	if(stat(fname,&ftst)) return lastftype=-1;
		168	ftest_size=ftst.st_size;
		169	if(S_ISREG(ftst.st_mode)) {
5505	bpr	170	if((ftst.st_mode&(S_IXUSR\|S_IXGRP\|S_IXOTH))!=0) return lastftype=is_exec;
		171	else return lastftype=is_file;
10	reyssat	172	}
		173	if(S_ISDIR(ftst.st_mode)) return lastftype=is_dir;
		174	if(S_ISFIFO(ftst.st_mode)) return lastftype=is_fifo;
		175	if(S_ISSOCK(ftst.st_mode)) return lastftype=is_socket;
		176	return lastftype=is_unknown;
		177	}
		178
		179	char fnbuf[MAX_FNAME+1];
		180
8343	bpr	181	/* make a filename and check length */
10	reyssat	182	char mkfname(char buf[], char s,...)
		183	{
		184	va_list vp;
		185	char *p;
		186
		187	if(buf==NULL) p=fnbuf; else p=buf;
		188	va_start(vp,s);
		189	vsnprintf(p,MAX_FNAME,s,vp);
		190	va_end(vp);
		191	if(strlen(p)>=MAX_FNAME-1) nametoolong(p);
		192	return p;
		193	}
		194
		195	void sysmask_trigger(char *s)
		196	{
		197	char buf[MAX_FNAME+1];
		198	struct stat st;
		199	mkfname(buf,"%s/%s",sysmask_trigger_dir,s);
		200	stat(buf,&st);
		201	}
		202
8343	bpr	203	/* read-in a file into buffer. Use open() and read().
5505	bpr	204	* Return buffer address which will be malloc'ed if buf=NULL. */
10	reyssat	205	char readfile(char fname, char buf[], long int buflen)
		206	{
		207	int fd, t, st;
		208	long int l, lc;
		209	char *bf;
		210	t=0; if(buf) buf[0]=0;
		211	st=ftest(fname); if(st!=is_file) {
5505	bpr	212	if(st==is_exec) { /* refuse to open executable file */
		213	setvar("executable",fname); module_error("executable");
		214	}
		215	return NULL;
10	reyssat	216	}
		217	l=ftst.st_size; if(l<0) return NULL;
		218	if(l>=buflen) {
5505	bpr	219	if(buflen<MAX_LINELEN) l=buflen-1;
		220	else {
		221	if(strncmp(fname,"modules/",strlen("modules/"))==0) {
		222	setvar(error_data_string,fname); module_error("file_too_long");
		223	}
		224	else user_error("cmd_output_too_long");
		225	}
10	reyssat	226	}
		227	fd=open(fname,O_RDONLY); if(fd==-1) return NULL;
		228	if(buf==NULL) bf=xmalloc(l+8); else {bf=buf;if(l==0) {t=1; l=buflen-1;}}
		229	lc=read(fd,bf,l); close(fd);
7646	bpr	230	if(lc<0 \|\| lc>l \|\| (lc!=l && t==0))
5505	bpr	231	{if(buf==NULL) free(bf); else buf[0]=0; return NULL;}
10	reyssat	232	bf[lc]=0; _tolinux(bf); return bf;
		233	}
		234
8343	bpr	235	/* Get a line in a stored working file.
5505	bpr	236	* Buffer length is always MAX_LINELEN. */
10	reyssat	237	int wgetline(char buf[], size_t buflen, WORKING_FILE *f)
		238	{
		239	int i,j; unsigned int n;
		240	i=f->linepointer; buf[0]=0;
		241	if(i>=f->linecnt \|\| f->textbuf==NULL) return EOF;
		242	n=f->lines[i].llen;
		243	if(n>=buflen) n=buflen-1;
11125	georgesk	244	if(n>0) memmove(buf,f->lines[i].address,n);
		245	buf[n]=0;
10	reyssat	246	for(j=i+1;j<f->linecnt && f->lines[j].isstart==0;j++);
		247	f->l=i; f->linepointer=j;
		248	if(j>=f->linecnt && n==0) return EOF; else return n;
		249	}
		250
		251	int get_cached_file(char *name)
		252	{
		253	int i,l,flag;
		254	l=strlen(name); if(l>=127) return -1;
		255	if(strncmp(module_prefix,module_dir,strlen(module_dir))!=0) flag=8; else flag=0;
		256	for(i=0;i<mcachecnt;i++) {
5505	bpr	257	if(flag==mcache[i].nocache && strcmp(name,mcache[i].name)==0) {
		258	memmove(&m_file,mcache+i,sizeof(WORKING_FILE));
		259	m_file.nocache\|=4;
		260	return i;
		261	}
10	reyssat	262	}
		263	return -1;
		264	}
		265
8343	bpr	266	/* Open a work file. Returns 0 if OK. */
10	reyssat	267	int open_working_file(WORKING_FILE f, char fname)
		268	{
		269	char p, q;
		270	void *vp;
		271	int i,j,k,laststart,lc[LINE_LIMIT];
		272
		273	f->linecnt=f->linepointer=0;
		274	f->for_idx=f->nocache=0;
		275	f->l=-1; f->lines=NULL;
10051	bpr	276	strncpy(f->filepath,fname,MAX_FNAME+1);
10	reyssat	277	f->textbuf=readfile(fname,NULL,WORKFILE_LIMIT);
		278	if(f->textbuf==NULL) return -1;
		279	p=f->textbuf; if(*p) {
5505	bpr	280	for(i=0,p--; i<LINE_LIMIT-1 && p!=NULL;p=strchr(p,'\n')) {
		281	if(i>0) *p=0;
		282	lc[i++]=(++p-f->textbuf);
		283	}
10	reyssat	284	}
		285	else i=0;
		286	if(i>=LINE_LIMIT-1) module_error("file_too_long");
		287	lc[i]=lc[i-1]+strlen(f->textbuf+lc[i-1])+1;
		288	f->textbuf[lc[i]]=0;
		289	f->linecnt=i; laststart=0;
		290	f->for_stack=xmalloc(MAX_FOR_LEVELsizeof(FOR_STACK)+(i+1)sizeof(LINE_STRUCT));
		291	vp=f->for_stack+MAX_FOR_LEVEL; f->lines=vp;
		292	for(j=0;j<i;j++) {
5505	bpr	293	f->lines[j].address=p=(f->textbuf)+lc[j];
		294	f->lines[j].llen=lc[j+1]-lc[j]-1;
		295	(f->lines[j]).execcode=(f->lines[j]).varcode=-1;
		296	if(j==0) goto normal;
		297	q=f->lines[laststart].address+f->lines[laststart].llen-1;
		298	if(q>=f->textbuf && *q=='\\') {
		299	f->lines[laststart].llen+=f->lines[j].llen; *q='\n';
		300	f->lines[j].isstart=f->lines[j].llen=0;
		301	memmove(q+1,p,lc[j+1]-lc[j]);
		302	}
		303	else {
		304	normal: for(q=p;myislspace(*q);q++);
		305	f->lines[j].isstart=1; laststart=j; k=0;
		306	switch(*q) {
		307	/* isstart: bit 1 = start.
		308	* bit 2 = exec
		309	* bit 3 (4) = label
		310	* bit 4 (8) = hard comment (!!)
		311	* bit 5 (16) = soft comment (#) */
		312	case exec_prefix_char: {
		313	if(myisalpha(q[1])) f->lines[j].isstart=3;
		314	else f->lines[j].isstart=9;
		315	k=1; break;
		316	}
		317	case label_prefix_char: {f->lines[j].isstart=5; k=1; break;}
		318	case comment_prefix_char: {f->lines[j].isstart=17; break;}
		319	default: {f->lines[j].isstart=1; break;}
		320	}
		321	if(k && q>p) {f->lines[j].address=q;f->lines[j].llen-=q-p;}
		322	}
10	reyssat	323	}
		324	f->lines[i].isstart=1; f->lines[i].llen=0;
		325	f->lines[i].address=(f->textbuf)+lc[i];
		326	mfilecnt++; return 0;
		327	}
		328
8343	bpr	329	/* close an earlier opened working file */
10	reyssat	330	void close_working_file(WORKING_FILE *f, int cache)
		331	{
		332	f->linepointer=f->l=0;
		333	if(cache && untrust==0 && mcachecnt<MAX_MCACHE && (f->nocache&7)==0) {
5505	bpr	334	memmove(mcache+mcachecnt,f,sizeof(WORKING_FILE));
		335	mcachecnt++;
10	reyssat	336	}
		337	else if((f->nocache&4)==0) {
5505	bpr	338	if(f->for_stack!=NULL) free(f->for_stack);
		339	if(f->textbuf!=NULL) free(f->textbuf);
10	reyssat	340	}
		341	f->for_stack=NULL; f->textbuf=NULL; f->linecnt=0;
		342	}
		343
		344	void free_mcache(void)
		345	{
		346	int i;
		347	untrust=0;
		348	for(i=mcachecnt-1;i>=0;i--) close_working_file(mcache+i,0);
		349	mcachecnt=0;
		350	}
		351
		352	void cleantmpdir(void);
		353	void user_error_log(char msg[]);
		354
		355	void nested_error(char msg[])
		356	{
		357	fprintf(stderr,"\nNested error! %s\n",msg);
		358	nph_header(420);
		359	printf("\r\n\r\nWIMS error processing aborted on nested error.\r\n\r\n%s\r\n",msg);
		360	delete_pid(); exit(1);
		361	}
		362
8343	bpr	363	/* Send an error message to requester and exit.
		364	* This is for user errors, language-sensitive.
		365	*/
10	reyssat	366	void user_error(char msg[])
		367	{
		368	char erfname[MAX_FNAME+1];
		369
		370	if(error_status) nested_error(msg);
		371	error_status=1;
		372	mkfname(erfname,"%s.%s",user_error_msg_file,lang);
		373	if(ftest(erfname)!=is_file) internal_error("user_error(): error message file not found.\n\
		374	Bad installation.");
		375	force_setvar("wims_user_error",msg);
7646	bpr	376	if(strcmp(msg,"threshold")!=0) user_error_log(msg);
		377	memmove(module_prefix,".",2);
10	reyssat	378	if(lastout_file!=-1 && outputing) {
5505	bpr	379	flushoutput(); close(lastout_file); lastout_file=-1;
10	reyssat	380	}
		381	nph_header(450);
7646	bpr	382	phtml_put_base(erfname,0);
		383	if(strcmp(msg,"double_click")!=0) delete_pid();
10	reyssat	384	else {
5505	bpr	385	cleantmpdir(); flushlog();
10	reyssat	386	}
		387	flushoutput(); exit(0);
		388	}
		389
		390	void module_error_log(char msg[]);
		391
8343	bpr	392	/* Messages for module errors. English only.
		393	* This is really rudimentary for the time being.
		394	*/
10	reyssat	395	void module_error(char msg[])
		396	{
		397	int send=0;
		398	char *p;
		399	WORKING_FILE mf;
		400
		401	if(error_status) nested_error(msg);
		402	error_status=1; untrust=0;
		403	module_error_log(msg);
		404	nph_header(550);
		405	printf("Server: %s %s (%s)\r\n", SHORTSWNAME,wims_version,LONGSWNAME);
		406	p=getvar("wims_main_font");
		407	if(p!=NULL && *p!=0) printf("Content-type: text/plain; charset=%s\r\n\r\n",p);
		408	else printf("Content-type: text/plain\r\n\r\n");
		409	p=getvar(ro_name[ro_module]); if(p==NULL) p="???";
		410	printf("ERROR.\n\nwims has detected an error in the module '%s'.",p);
		411	if(m_file.l>=0) printf("\n\nIn file '%s', line %d:",
5505	bpr	412	m_file.name,m_file.l+1);
10	reyssat	413	printf(" %s.\n\n",msg);
		414	if(open_working_file(&mf,mkfname(NULL,"%s.%s",module_error_msg_file,lang))!=0)
		415	internal_error("module_error(): error message file not found.");
		416	while(wgetline(tmplbuf,MAX_LINELEN,&mf)!=EOF) {
5505	bpr	417	if(tmplbuf[0]!=tag_prefix_char) {
		418	if(send) {substit(tmplbuf); puts(tmplbuf);}
		419	continue;
		420	}
		421	strip_trailing_spaces(tmplbuf);
		422	if(tmplbuf[1]==0 \|\| strcmp(msg,tmplbuf+1)==0) send=1;
		423	else send=0;
10	reyssat	424	}
		425	close_working_file(&mf,0);
		426	outptr=outbuf; delete_pid(); exit(1);
		427	}
		428
5505	bpr	429	/* Output kernel routine */
10	reyssat	430	void _output_(char *s)
		431	{
		432	int l,l2;
		433	l=strlen(s); output_length+=l;
		434	if(output_length>=OUTPUT_LENGTH_LIMIT) {
5505	bpr	435	module_error("output_too_long"); return;
10	reyssat	436	}
		437	l2=sizeof(outbuf)-(outptr-outbuf);
		438	put: if(l<=l2) {
5505	bpr	439	memmove(outptr,s,l); outptr+=l; return;
10	reyssat	440	}
		441	memmove(outptr,s,l2); s+=l2; l-=l2;
3843	kbelabas	442	if(lastout_file!=-1) (void)write(lastout_file,outbuf,sizeof(outbuf));
10	reyssat	443	else fwrite(outbuf,sizeof(outbuf),1,stdout);
		444	outptr=outbuf; l2=sizeof(outbuf); goto put;
		445	}
		446
5505	bpr	447	/* Output with no var. */
10	reyssat	448	void output0(char buf[])
		449	{
		450	char p1, p2, *ps;
		451	int dynsave;
		452	if(backslash_insmath) {
5505	bpr	453	ps=buf; dynsave=instex_usedynamic;
		454	for(p1=strstr(buf,"\\("); p1; p1=strstr(p2,"\\(")) {
		455	p2=find_matching(p1+2,')');
		456	if(p2==NULL) break;
		457	if(p1>buf && *(p1-1)=='\\') continue;
		458	p1=0; if((p2-1)=='\\') (p2-1)=0; p2++=0; _output_(ps); ps=p2;
		459	instex_usedynamic=1; insmath(p1+2);
		460	}
11125	georgesk	461	if(*ps) _output_(ps);
		462	instex_usedynamic=dynsave;
10	reyssat	463	}
		464	else _output_(buf);
		465	}
		466
5505	bpr	467	/* Output routine */
10	reyssat	468	void output(char *s,...)
		469	{
		470	va_list vp;
		471	char buf[4*MAX_LINELEN+1];
		472
		473	va_start(vp,s);
		474	vsnprintf(buf,sizeof(buf),s,vp);
		475	va_end(vp);
		476	output0(buf);
		477	}
		478
8343	bpr	479	/* read in tmpf in tmp directory, and places in p.
		480	* Maximal length: MAX_LINELEN.
		481	*/
10	reyssat	482	void read_tmp_file(char p, const char fname)
		483	{
		484	char name, pp;
		485	name=mkfname(NULL,"%s/%s",tmp_dir,fname);
		486	if(!exec_is_module \|\| !outputing \|\| !direct_exec
		487	\|\| strcmp(fname,"exec.out")!=0) {
5505	bpr	488	readfile(name,p,MAX_LINELEN);
		489	pp=getvar("wims_exec_dollar_double");
		490	if(pp && strcmp(pp,"yes")==0) {
		491	for(pp=strchr(p,'$'); pp; pp=strchr(pp+2,'$'))
		492	string_modify(p,pp,pp+1,"$$");
		493	}
10	reyssat	494	}
		495	else {
5505	bpr	496	char *s;
		497	s=readfile(name,NULL,OUTPUT_LENGTH_LIMIT);
		498	if(s==NULL) {*p=0; return;}
		499	if(memcmp(s,"Error: ", strlen("Error: "))==0) mystrncpy(p,s,MAX_LINELEN);
		500	output_length+=strlen(s);
		501	if(output_length>=OUTPUT_LENGTH_LIMIT) module_error("output_too_long");
		502	else _output_(s);
		503	free(s); *p=0;
		504	chmod(name,S_IRUSR\|S_IWUSR);
10	reyssat	505	}
		506	}
		507
8343	bpr	508	/* verify whether the module is trusted.
		509	* Returns 1 if yes, 0 if no. -1 for error.
		510	*/
10	reyssat	511	int trusted_module(void)
		512	{
		513	char modname, w, buf[MAX_LINELEN+1];
		514	int i,n;
5505	bpr	515	static int _trusted=-1; /* avoid repeated computations */
7646	bpr	516
10	reyssat	517	if(untrust&255) return 0;
		518	if(_trusted>=0) return _trusted;
		519	modname=getvar(ro_name[ro_module]);
		520	if(modname==NULL \|\| *modname==0) return 0;
7646	bpr	521	if(memcmp(modname,"adm/",strlen("adm/"))==0 \|\|
		522	memcmp(modname,"classes/",strlen("classes/"))==0 \|\|
10	reyssat	523	strcmp(modname,home_module)==0 \|\|
		524	memcmp(modname,"help/",strlen("help/"))==0) {
5505	bpr	525	tr:
		526	if(memcmp(modname,"classes/",strlen("classes/"))==0)
		527	is_class_module=1;
		528	setenv("trusted_module","yes",1);
		529	return _trusted=1;
10	reyssat	530	}
		531	n=wordnum(trusted_modules); for(i=0;i<n;i++) {
5505	bpr	532	w=fnd_word(trusted_modules,i+1,buf);
		533	if(strcmp(w,modname)==0) goto tr;
10	reyssat	534	}
		535	return _trusted=0;
		536	}
		537
8343	bpr	538	/* file should be in the module directory, but
		539	* it may also be somewhere else.
		540	* buf[] requires MAX_FNAME+1 length.
		541	* Returns 0 if found.
		542	*/
10	reyssat	543	int find_module_file(char *fname, char buf[], int mode)
		544	{
		545	char *p, dtest[32];
7646	bpr	546
10	reyssat	547	fname=find_word_start(fname);
		548	if(*fname==0) return -1;
8343	bpr	549	/* Name checking: no directory backtracing. */
10	reyssat	550	if(strstr(fname,parent_dir_string)!=NULL) {
5505	bpr	551	setvar(error_data_string,fname); module_error("illegal_fname");
		552	return -1;
10	reyssat	553	}
		554	p=strchr(fname,'/'); if(p==NULL \|\| p>fname+10) goto openit;
		555	memmove(dtest,fname,p-fname); dtest[p-fname]=0;
		556	if(strcmp(dtest,"datamodule")==0) {
5505	bpr	557	mkfname(buf,"modules/data%s",p); goto lastopen;
10	reyssat	558	}
		559	if(strcmp(dtest,"wimshome")==0 && trusted_module()) {
5505	bpr	560	mkfname(buf,"%s%s",getvar("wims_home"),p); goto lastopen;
10	reyssat	561	}
		562	if(strcmp(dtest,"writable")==0) {
5505	bpr	563	if(strncmp(p+1,"TEMP_",5)==0 && strchr(p+1,'/')==NULL) {
		564	mkfname(buf,"%s/%s",tmp_dir,p+1);
		565	}
		566	else {
		567	mkfname(buf,"w/%s/%s",module_prefix,p+1);
		568	}
7646	bpr	569	untrust\|=4;
10	reyssat	570	}
		571	else {
5505	bpr	572	openit: mkfname(buf,"%s/%s",module_prefix,fname);
10	reyssat	573	}
		574	if(mode) return 0;
		575	if(ftest(buf)!=is_file) {
5505	bpr	576	if(lastftype==is_exec) {
10	reyssat	577	isexec:
5505	bpr	578	setvar("executable",fname); module_error("executable");
		579	return -1;
		580	}
7646	bpr	581	if(strncmp(fname,"adm/",4)==0 &&
5505	bpr	582	(!trusted_module() \|\| is_class_module)) return -1;
		583	mkfname(buf,"scripts/%s",fname);
		584	lastopen:
		585	if(mode) return 0;
		586	if(ftest(buf)!=is_file) {
		587	if(lastftype==is_exec) goto isexec;
		588	else return -1;
		589	}
10	reyssat	590	}
		591	return 0;
		592	}
		593
8343	bpr	594	/* check whether a file is user-submitted
		595	* This is deprecated because of the wimshome/ method.
		596	*/
10	reyssat	597	/* int user_file(char *name) {
		598	if(name[0]=='/' \|\| name[0]=='.' \|\|
7646	bpr	599	strstr(name,"classes/")!=NULL \|\|
10	reyssat	600	strstr(name,"forums/")!=NULL \|\|
		601	strstr(name,"sessions/")!=NULL \|\|
		602	strstr(name,"doc/")!=NULL) return 1; else return 0;
8343	bpr	603	}
		604	*/
10	reyssat	605
8343	bpr	606	/* returns 1 if violation */
10	reyssat	607	int datafile_check(char *name) {
		608	if((untrust&255)==0) return 0;
		609	if(strncmp(name,"data/",strlen("data/"))==0) return 0;
		610	if(strncmp(name,"authors/",strlen("authors/"))==0) return 0;
5333	bpr	611	if(strncmp(name,"datamodule/",strlen("datamodule/"))==0) return 0;
10	reyssat	612	return 1;
		613	}
		614
8343	bpr	615	/* returns 0 if success */
10	reyssat	616	void readdatafile(char *name)
		617	{
		618	char *pp;
		619	if(strcmp(name,lastdatafile)==0) return;
		620	lastdata[0]=0; readfile(name,lastdata,WORKFILE_LIMIT);
		621	mystrncpy(lastdatafile,name,sizeof(lastdatafile));
		622	datacache[0]=lastdata; nextdatacache=1;
		623	if(lastdata[0]==tag_string[1]) {
5505	bpr	624	datacache[1]=lastdata; nextdatacache++;
10	reyssat	625	}
		626	pp=strstr(lastdata,tag_string);
		627	if(pp) datacache[nextdatacache]=pp;
		628	else datacache[nextdatacache]=lastdata+strlen(lastdata);
		629	}
		630
		631	char _nextdata(char p)
		632	{
		633	char *pp;
		634	if(!*p) return p;
		635	pp=strstr(p,tag_string);
		636	if(pp) return pp;
		637	else return p+strlen(p);
		638	}
		639
8343	bpr	640	/* datafile structure: number of records.
		641	* tag=1 if direct access
		642	*/
10	reyssat	643	unsigned int datafile_recordnum(char *p)
		644	{
		645	char nbuf[MAX_LINELEN+1], *pp;
		646	int i, t, ret;
		647
		648	t=untrust; ret=0;
		649	if(direct_datafile) mystrncpy(nbuf,p,sizeof(nbuf));
		650	else if(datafile_check(p)!=0 \|\| find_module_file(p,nbuf,0)) goto ret;
7646	bpr	651	readdatafile(nbuf);
10	reyssat	652	for(i=nextdatacache, pp=datacache[i]; *pp;) {
5505	bpr	653	pp=_nextdata(pp+1); i++;
		654	if(i<DATAFIELD_LIMIT) {
		655	datacache[i]=pp; nextdatacache=i;
		656	}
10	reyssat	657	}
		658	ret=i-1;
		659	ret:
		660	untrust=t;
		661	return ret;
		662	}
		663
8343	bpr	664	/* datafile structure: find record n, starting from 1 */
10	reyssat	665	char datafile_fnd_record(char p, int n, char bf[])
		666	{
		667	char nbuf[MAX_LINELEN+1], pp, p2;
		668	int i, t;
		669
		670	bf[0]=0; t=untrust;
		671	if(n<0) goto ret;
		672	if(direct_datafile) mystrncpy(nbuf,p,sizeof(nbuf));
		673	else if(datafile_check(p)!=0 \|\| find_module_file(p,nbuf,0)) goto ret;
		674	readdatafile(nbuf); if(*lastdata==0) goto ret;
		675	if(n>nextdatacache) {
5505	bpr	676	for(i=nextdatacache, pp=datacache[i]; i<n && *pp;) {
		677	pp=_nextdata(pp+1); i++;
		678	if(i<DATAFIELD_LIMIT) {
		679	datacache[i]=pp; nextdatacache=i;
		680	}
		681	}
10	reyssat	682	}
		683	else pp=datacache[n];
		684	if(!*pp) goto ret;
		685	if(n>1 \|\| (n==1 && *pp!=tag_string[1])) pp+=strlen(tag_string);
		686	else if(n==1) pp+=strlen(tag_string)-1;
		687	if(n<nextdatacache) p2=datacache[n+1];
		688	else {
5505	bpr	689	p2=strstr(pp,tag_string); if(p2==NULL) p2=pp+strlen(pp);
		690	if(n<DATAFIELD_LIMIT-1 && n==nextdatacache) {
		691	nextdatacache++; datacache[nextdatacache]=p2;
		692	}
10	reyssat	693	}
		694	if(p2-pp>=MAX_LINELEN) p2=pp+MAX_LINELEN-1;
		695	if(p2<pp) p2=pp;
		696	memmove(bf,pp,p2-pp); bf[p2-pp]=0;
		697	ret:
		698	untrust=t; return bf;
		699	}
		700
		701	char hex2char(char c1, char c2)
		702	{
		703	char tbuf[16];
		704	if(c1<'0' \|\| c1>'f' \|\| c2<'0' \|\| c2>'f') {
		705	invl:
5505	bpr	706	snprintf(tbuf,sizeof(tbuf),"%%%c%c",c1,c2);
		707	setvar(error_data_string,tbuf);
		708	user_error("invalid_char_in_query_string");
10	reyssat	709	}
		710	c1=toupper(c1);c2=toupper(c2);
		711	if(c1>'9' && c1<'A') goto invl;
		712	if(c2>'9' && c2<'A') goto invl;
		713	if(c1>'F' \|\| c2>'F') goto invl;
		714	if(c1>='A') c1=c1-'A'+'9'+1;
		715	if(c2>='A') c2=c2-'A'+'9'+1;
		716	return (c1-'0')*16+c2-'0';
		717	}
		718
8343	bpr	719	/* Converts back http escaped chars, slight. Does not check buffer length.
		720	* Returns converted string length.
		721	*/
10	reyssat	722	int _http2env(char outs[], char ins[])
		723	{
		724	int j,k,l;
		725	l=strlen(ins);
		726	for(j=k=0;j<l && !isspace(ins[j]);j++,k++) {
5505	bpr	727	if(isspace(ins[j])) { /* skip space characters in query string */
		728	k--;continue;
		729	}
		730	if(ins[j]=='%') {
8343	bpr	731	/* skip Carriage-Return. */
5505	bpr	732	if(ins[j+1]=='0' && (ins[j+2]=='d' \|\| ins[j+2]=='D')) {
		733	j+=2; k--; continue;
		734	}
		735	outs[k]=hex2char(ins[j+1],ins[j+2]);
		736	j+=2; continue;
		737	}
		738	outs[k]=ins[j];
10	reyssat	739	}
7646	bpr	740	outs[k]=0;
10	reyssat	741	return k;
		742	}
		743
8343	bpr	744	/* Converts back http escaped chars. Does not check buffer length.
		745	* Returns converted string length.
		746	*/
10	reyssat	747	int http2env(char outs[], char ins[])
		748	{
		749	int j,k,l;
		750	l=strlen(ins);
		751	for(j=k=0;j<l && !isspace(ins[j]);j++,k++) {
5505	bpr	752	if(isspace(ins[j])) { /* skip space characters in query string */
		753	k--;continue;
		754	}
		755	if(ins[j]=='%') {
8343	bpr	756	/* skip Carriage-Return. */
5505	bpr	757	if(ins[j+1]=='0' && (ins[j+2]=='d' \|\| ins[j+2]=='D')) {
		758	j+=2; k--; continue;
		759	}
		760	outs[k]=hex2char(ins[j+1],ins[j+2]);
		761	j+=2; continue;
		762	}
		763	if(ins[j]=='+') {
		764	outs[k]=' '; continue;
		765	}
		766	if(ins[j]=='?' \|\| ins[j]=='&') {
		767	outs[k]=0; continue;
		768	}
		769	outs[k]=ins[j];
10	reyssat	770	}
7646	bpr	771	outs[k]=0;
10	reyssat	772	return k;
		773	}
		774
8343	bpr	775	/* translate a string to http querystring style.
		776	* '&' is not translated.
		777	* Buffer p must be at least MAX_LINELEN.
		778	*/
10	reyssat	779	void tohttpquery(char *p)
		780	{
		781	char trlist[]=" ()[]{}+-*^\|/\"\'!:;,<>\n";
		782	char *pp;
		783	for(pp=p;*pp;pp++) {
5505	bpr	784	if(*pp==' ') {
		785	*pp='+'; continue;
		786	}
		787	if(strchr(trlist,*pp)==NULL) continue;
		788	if(pp=='+' && pp>p && (pp-1)=='&') continue;
		789	if(pp>p && *(pp-1)=='\\') {
		790	ovlstrcpy(pp-1,pp);pp--;continue;
		791	}
		792	if(*pp=='\n') {
		793	string_modify(p,pp,pp+1,"%%0D%%0A");pp+=5;
		794	}
		795	else {
		796	string_modify(p,pp,pp+1,"%%%02X",*pp);pp+=2;
		797	}
10	reyssat	798	}
		799	}
		800
8343	bpr	801	/* substitute backslash parameters. Internal use only. */
10	reyssat	802	void slashsubst(char *p)
		803	{
		804	char p1, p2, pt, pp, namebuf[128];
		805	int n;
		806
		807	n=strlen(mathfont_prefix); memmove(namebuf,mathfont_prefix,n+1);
		808	for(p1=strchr(p,'\\'); p1!=NULL; p1=strchr(p1,'\\')) {
5505	bpr	809	p1++; for(p2=p1; myisalnum(p2) \|\| p2=='_'; p2++);
		810	if(p2<=p1 \|\| p2>p1+100) continue;
		811	memmove(namebuf+n,p1,p2-p1); namebuf[p2-p1+n]=0;
		812	pt=_getvar(namebuf); if(pt==NULL) continue;
		813	if(*p2=='[' && (pp=find_matching(p2+1,']'))!=NULL) {
		814	string_modify(p,pp+1,pp+1,")");
		815	string_modify(p,p1-1,p1,"$(%s",mathfont_prefix);
		816	}
		817	else string_modify(p,p1-1,p1,"$%s",mathfont_prefix);
10	reyssat	818	}
		819	}
		820
8343	bpr	821	/* two alarm handlers. */
10	reyssat	822	void alarm1(int s)
		823	{
		824	if(killpid>0 && kill(killpid,SIGKILL)) module_error("timeup");
		825	killpid=0;
		826	}
		827
		828	void alarm2(int s)
		829	{
		830	cleantmpdir();
		831	alarm1(s); module_error("timeup");
		832	}
		833
		834	void finalalarm(void)
		835	{
		836	time_t curr;
		837	curr=time(0);
		838	if(curr>=limtime) alarm2(SIGALRM);
		839	errno=0;
		840	if(signal(SIGALRM,alarm2)==SIG_ERR)
		841	internal_error(strerror(errno));
		842	alarm(limtime-curr+1);
		843	}
		844
		845	void initalarm(void)
		846	{
		847	limtimex=nowtime+4*rlimit_cpu/3;
		848	limtime=limtimex+2; finalalarm();
		849	}
		850
		851	void forkalarm(void)
		852	{
		853	time_t curr;
		854	curr=time(0);
		855	if(curr>=limtimex) {alarm1(SIGALRM); return;}
		856	if(signal(SIGALRM,alarm1)==SIG_ERR)
		857	internal_error(strerror(errno));
		858	alarm(limtimex-curr+1);
		859	}
		860
8343	bpr	861	/* create pid tag */
10	reyssat	862	void create_pid(void)
		863	{
		864	char buf[MAX_FNAME+1], pbuf[256], obuf[MAX_FNAME+1];
		865	struct stat dst;
		866	struct utimbuf ub;
7646	bpr	867
10	reyssat	868	if(robot_access \|\| *session_prefix==0) return;
		869	if(cmd_type==cmd_getframe) return;
		870	mkfname(buf,"%s/.pid",s2_prefix);
8343	bpr	871	/* another process running? */
10	reyssat	872	if(readfile(buf,pbuf,sizeof(pbuf))!=NULL) {
5505	bpr	873	mkfname(obuf,"/proc/%s",pbuf);
		874	if(stat(obuf,&dst)==0) user_error("double_click");
10	reyssat	875	}
		876	snprintf(pidbuf,sizeof(pidbuf),"%u",getpid());
		877	accessfile(pidbuf,"w","%s",buf);
8343	bpr	878	/* Touch session time */
10	reyssat	879	if(strstr(session_prefix,"sessions/")==NULL) return;
		880	ub.actime=ub.modtime=nowtime;
		881	utime(session_prefix,&ub);
		882	if(strchr(session_prefix,'_')!=NULL) { /* touch parent too */
5505	bpr	883	char sbuf[MAX_FNAME+1], *p;
		884	mystrncpy(sbuf,session_prefix,sizeof(sbuf));
		885	p=strchr(sbuf,'_'); if(p!=NULL) *p=0;
		886	utime(sbuf,&ub);
10	reyssat	887	}
		888	}
		889
8185	bpr	890	struct mxtab mxtab[MAX_MULTIEXEC];
10	reyssat	891	int mxno=0;
		892
		893	int execredirected(char cmdf, char inf, char outf, char errf, char *arg[])
		894	{
		895	pid_t pid;
		896	int status, t;
		897
		898	if(robot_access) return 0;
		899	if(time(0)>=limtimex) {
5505	bpr	900	if(errf!=NULL)
		901	accessfile("No time left to execute subprograms.\n","w","%s",errf);
		902	return -100;
10	reyssat	903	}
		904	lastdatafile[0]=lastftest[0]=0;
8343	bpr	905	fflush(NULL); /* flush all output streams before forking
		906	* otherwise they will be doubled
		907	*/
10	reyssat	908	pid=fork(); if(pid==-1) return -1;
5505	bpr	909	if(!pid) { /* child */
		910	char buf[MAX_LINELEN+1]; int k;
		911	(void)nice(10); /* lower priority for children */
		912	if(is_multiexec) {
		913	dup2(mxtab[multiexec_index].pipe_stdin[0],0);
		914	dup2(mxtab[multiexec_index].pipe_stdout[1],1);
		915	dup2(mxtab[multiexec_index].pipe_stderr[1],2);
		916	}
		917	else {
		918	if(inf!=NULL) (void)freopen(inf,"r",stdin);
		919	if(outf!=NULL) (void)freopen(outf,"w",stdout);
		920	if(errf!=NULL) (void)freopen(errf,"w",stderr);
		921	}
8343	bpr	922	/* This is to patch LinuxPPC uid wrapping
		923	* for scripts */
5505	bpr	924	t=0; if(strchr(cmdf,'/')) {
		925	int tf;
		926	char tbuf[16];
		927	tf=open(cmdf,O_RDONLY); (void)read(tf,tbuf,8); close(tf);
		928	if(memcmp(tbuf+1,"ELF",3)!=0) t=1;
		929	}
		930	if(wrapexec==-1) {
		931	setreuid(getuid(),getuid());setregid(getgid(),getgid());
		932	}
		933	if(wrapexec==1 \|\| (t==1 && wrapexec==0)) {
		934	setreuid(geteuid(),geteuid());setregid(getegid(),getegid());
		935	}
		936	errno=0;
		937	if(strchr(cmdf,'/')) execve(cmdf,arg,environ);
		938	else execvp(cmdf,arg);
		939	snprintf(buf,sizeof(buf),"Failed to execute");
		940	for(k=0;arg[k];k++) {
		941	t=strlen(buf);
		942	snprintf(buf+t,sizeof(buf)-t," %s",arg[k]);
		943	}
		944	t=strlen(buf);
		945	snprintf(buf+t,sizeof(buf)-t,"\n %s\n",strerror(errno));
		946	accessfile(buf,"a","%s/exec.fail",tmp_dir);
		947	exit(127);
10	reyssat	948	}
5505	bpr	949	else { /* parent */
7646	bpr	950	wrapexec=0; status=0;
5505	bpr	951	if(exec_wait && !is_multiexec) {
		952	killpid=pid; forkalarm();
		953	waitpid(pid,&status,0); killpid=0; finalalarm();
		954	}
		955	return WEXITSTATUS(status);
10	reyssat	956	}
		957	}
		958
8343	bpr	959	/* preparation for resident execution.
		960	* Returns 1 if already up, otherwise 0.
		961	*/
10	reyssat	962	int multiexec(char cmd, char *abuf)
		963	{
		964	char *p;
		965	int i;
7646	bpr	966
10	reyssat	967	if(robot_access) return 0;
		968	if(strstr(tmp_dir,"sessions/")==NULL) return 0;
7646	bpr	969	if(strstr(tmp_debug,"yes")!=NULL && checkhost(manager_site)>=1)
10	reyssat	970	setenv("multiexec_debug","yes",1);
		971	p=getvar("wims_multiexec");
		972	if(p==NULL \|\| wordchr(p,cmd)==NULL) return 0; /* not allowed */
		973	if(!multiexec_random[0]) {
5505	bpr	974	snprintf(multiexec_random, sizeof(multiexec_random),
		975	"%lX%lX%lX%lX%lX%lX%lX%lX",
		976	random(),random(),random(),random(),
		977	random(),random(),random(),random());
		978	setenv("multiexec_random",multiexec_random,1);
10	reyssat	979	}
		980	for(i=0;i<mxno && strcmp(cmd,mxtab[i].cmd)!=0; i++);
		981	multiexec_index=i;
		982	if(i==mxno) {
5505	bpr	983	if(mxno>=MAX_MULTIEXEC) return 0;
		984	if(pipe(mxtab[i].pipe_stdin)<0) return 0;
		985	if(pipe(mxtab[i].pipe_stdout)<0) return 0;
		986	if(pipe(mxtab[i].pipe_stderr)<0) return 0;
		987	mystrncpy(mxtab[i].cmd,cmd,sizeof(mxtab[i].cmd));
		988	mxno++; is_multiexec=1;
		989	exportall(); setenv("wims_exec_parm",multiexec_random,1);
		990	execredirected(abuf[0],NULL,NULL,NULL,abuf);
10	reyssat	991	}
		992	is_multiexec=0;
		993	return 1;
		994	}
		995
8343	bpr	996	/* my system(), but with variable parms
		997	* More secure than system(), and direct fork.
		998	*/
10	reyssat	999	int call_ssh(char *s,...)
		1000	{
		1001	va_list vp;
		1002	char buf[MAX_LINELEN+1];
		1003	char *arg[1024];
		1004	char inf=NULL, outf=NULL, *errf=NULL;
		1005	char cmdf, p, *p2;
		1006	int i, d;
		1007
		1008	if(robot_access) return 0;
		1009	va_start(vp,s);
		1010	vsnprintf(buf,sizeof(buf),s,vp);
		1011	va_end(vp);
		1012	p=find_word_start(buf); if(*p==0) return 0;
		1013	cmdf=p;
		1014	for(i=0;*p!=0 && i<1000; p=find_word_start(p2)) {
5505	bpr	1015	switch(*p) {
		1016	case '\'': {
		1017	p++; p2=strchr(p,'\''); if(p2==NULL) p2=p+strlen(p);
		1018	d=0; break;
		1019	}
		1020	case '"': {
		1021	p++; p2=strchr(p,'"'); if(p2==NULL) p2=p+strlen(p);
		1022	d=0; break;
		1023	}
		1024	default: d=1; p2=find_word_end(p); break;
		1025	}
		1026	if(p2) p2++=0;
		1027	if(!d) {arg[i++]=p; continue;}
		1028	switch(*p) {
		1029	case '<': inf=++p; break;
		1030	case '>': {
		1031	p++; if(*p=='&') {
		1032	merge: p++; errf=outf=p; break;
		1033	}
		1034	else outf=p;
		1035	break;
		1036	}
		1037	case '&': {
		1038	p++; if(*p=='>') goto merge;
		1039	else break;
		1040	}
		1041	case '2': {
		1042	if(*(p+1)=='>') {errf=p+2; break;}
		1043	}
		1044	default: arg[i++]=p; break;
		1045	}
10	reyssat	1046	}
		1047	arg[i]=NULL;
		1048	return execredirected(cmdf,inf,outf,errf,arg);
		1049	}
		1050
8343	bpr	1051	/* Read/write to a file with variable parms to print filename */
10	reyssat	1052	void accessfile(char content, char type, char *s,...)
		1053	{
		1054	va_list vp;
		1055	char buf[MAX_FNAME+1];
		1056	int fd;
		1057
		1058	if(robot_access) return;
		1059	va_start(vp,s);
		1060	vsnprintf(buf,sizeof(buf),s,vp);
		1061	va_end(vp);
		1062	if(strlen(buf)>=MAX_FNAME-1) nametoolong(buf);
		1063	switch(*type) {
5505	bpr	1064	case 'r': readfile(buf,content,MAX_LINELEN); return;
		1065	case 'e': readfile(buf,content,MAX_LINELEN/4); return; /* limited read */
		1066	case 'w': fd=creat(buf,S_IRUSR\|S_IWUSR\|S_IRGRP\|S_IROTH); break;
		1067	case 'a': fd=open(buf,O_WRONLY\|O_CREAT\|O_APPEND,S_IRUSR\|S_IWUSR\|S_IRGRP\|S_IROTH); break;
		1068	default : return;
10	reyssat	1069	}
		1070	lastdatafile[0]=lastftest[0]=0;
		1071	if(fd==-1) return;
3843	kbelabas	1072	(void)write(fd,content,strlen(content)); close(fd);
10	reyssat	1073	}
		1074
8343	bpr	1075	/* system(), but with variable parms
		1076	* Uses sh to execute command.
		1077	*/
10	reyssat	1078	int call_sh(char *s,...)
		1079	{
		1080	va_list vp;
		1081	char buf[MAX_LINELEN+1];
		1082	char *abuf[8];
		1083
		1084	if(robot_access) return 0;
		1085	va_start(vp,s);
		1086	vsnprintf(buf,sizeof(buf),s,vp);
		1087	va_end(vp);
		1088	abuf[0]="sh"; abuf[1]="-c"; abuf[2]=buf; abuf[3]=NULL;
		1089	return execredirected(abuf[0],NULL,NULL,NULL,abuf);
		1090	}
		1091
		1092	void _getdef(char buf[], char *name, char value[])
		1093	{
		1094	char p1, p2, p3, p4;
		1095
5505	bpr	1096	if(name==0) goto nothing; / this would create segfault. */
10	reyssat	1097	for(p1=strstr(buf,name); p1!=NULL; p1=strstr(p1+1,name)) {
5505	bpr	1098	p2=find_word_start(p1+strlen(name));
		1099	if((p1>buf && !isspace((p1-1))) \|\| p2!='=') continue;
		1100	p3=p1; while(p3>buf && *(p3-1)!='\n') p3--;
		1101	p3=find_word_start(p3);
		1102	if(p3<p1 && *p3!='!') continue;
		1103	if(p3<p1) {
		1104	p3++; p4=find_word_end(p3);
		1105	if(find_word_start(p4)!=p1) continue;
		1106	if(p4-p3!=3 \|\| (strncmp(p3,"set",3)!=0 &&
		1107	strncmp(p3,"let",3)!=0 &&
		1108	strncmp(p3,"def",3)!=0)) {
		1109	if(p4-p3!=6 \|\| strncmp(p3,"define",6)!=0) continue;
		1110	}
		1111	}
		1112	p2++;p3=strchr(p2,'\n'); if(p3==NULL) p3=p2+strlen(p2);
		1113	p2=find_word_start(p2);
		1114	if(p2>p3) goto nothing;
		1115	if(p3-p2>=MAX_LINELEN) user_error("cmd_output_too_long");
		1116	memmove(value,p2,p3-p2); value[p3-p2]=0;
		1117	strip_trailing_spaces(value); return;
10	reyssat	1118	}
		1119	nothing:
		1120	value[0]=0; return;
		1121	}
		1122
8155	bpr	1123	/* Get variable definition from a file.
		1124	* Result stored in buffer value of length MAX_LINELEN.
		1125	*/
10	reyssat	1126	void getdef(char fname, char name, char value[])
		1127	{
		1128	char buf[MAX_LINELEN+1], tbuf[MAX_LINELEN+1], nbuf[MAX_NAMELEN+1];
		1129	char p1, p2;
		1130
		1131	value[0]=0; if(readfile(fname,buf,sizeof(buf)-16)==NULL) return;
		1132	mystrncpy(value,name,MAX_LINELEN);
		1133	for(p1=value; *p1; p1=p2) {
5505	bpr	1134	while(p1 && !myisalnum(p1) && *p1!='_') p1++;
		1135	if(*p1==0) break;
		1136	for(p2=p1; myisalnum(p2) \|\| p2=='_'; p2++);
		1137	if(p2-p1>MAX_NAMELEN) continue;
		1138	memmove(nbuf,p1,p2-p1); nbuf[p2-p1]=0;
		1139	_getdef(buf,nbuf,tbuf);
		1140	string_modify(value,p1,p2,"%s",tbuf);
		1141	p2=p1+strlen(tbuf);
10	reyssat	1142	}
		1143	}
		1144
		1145	int _setdef_changed;
		1146
		1147	void _setdef(char buf[], char name, char value)
		1148	{
		1149	char p1, p2, *p3;
		1150	int n;
7646	bpr	1151
10	reyssat	1152	for(p1=strstr(buf,name); p1!=NULL; p1=strstr(p1+1,name)) {
5505	bpr	1153	p2=find_word_start(p1+strlen(name));
		1154	if((p1>buf && !isspace((p1-1))) \|\| p2!='=') continue;
		1155	p3=p1; while(p3>buf && *(p3-1)==' ') p3--;
		1156	if(p3>buf && *(p3-1)!='\n') continue;
		1157	p2++;p3=strchr(p2,'\n'); if(p3==NULL) p3=p2+strlen(p2);
		1158	if(strlen(value)!=p3-p2 \|\| strncmp(value,p2,p3-p2)!=0) {
		1159	string_modify(buf,p2,p3,"%s",value);
		1160	_setdef_changed++;
		1161	}
		1162	return;
10	reyssat	1163	}
		1164	n=strlen(buf);
7646	bpr	1165	if(n>0 && buf[n-1]!='\n')
10	reyssat	1166	snprintf(buf+n,MAX_LINELEN-n,"\n%s=%s\n",name,value);
		1167	else
		1168	snprintf(buf+n,MAX_LINELEN-n,"%s=%s\n",name,value);
		1169	_setdef_changed++;
		1170	}
		1171
8155	bpr	1172	/* Set variable definition to a file. */
10	reyssat	1173	void setdef(char fname, char name)
		1174	{
		1175	char buf[MAX_LINELEN+1];
		1176	char p1, p2, *p3;
		1177
		1178	_setdef_changed=0;
		1179	if(strchr(name,'=')==NULL) return;
		1180	for(p1=name;*p1;p1++) {
5505	bpr	1181	if(isspace(p1) && p1!=' ' && p1!='\n') p1=' ';
		1182	if(*p1==' ') {
		1183	for(p2=p1+1; isspace(p2) && p2!='\n'; p2++);
		1184	if(p2>p1+1) ovlstrcpy(p1+1,p2);
		1185	p2=p1+1; if(p2=='=' \|\| p2=='\n') ovlstrcpy(p1,p2);
		1186	}
10	reyssat	1187	}
		1188	if(readfile(fname,buf,sizeof(buf))==NULL) buf[0]=0;
		1189	for(p1=find_word_start(name); p1!=NULL; p1=p2) {
5505	bpr	1190	p2=strchr(p1,'\n'); if(p2!=NULL) *p2++=0;
		1191	p1=find_word_start(p1);
		1192	p3=strchr(p1,'='); if(p3==NULL) continue;
		1193	*p3++=0; p3=find_word_start(p3);
		1194	_setdef(buf,p1,p3);
10	reyssat	1195	}
		1196	if(_setdef_changed) accessfile(buf,"w","%s",fname);
		1197	}
		1198
8155	bpr	1199	/* check whether connecting host is part of given list.
		1200	* Returns 0 if no, 1 if yes.
		1201	*/
10	reyssat	1202	int checkhost(char *hlist)
		1203	{
		1204	char buf[MAX_LINELEN+1];
		1205	char lbuf[1024], hbuf1[256], hbuf2[256];
		1206	char p1, p2, pb, pe, *pp;
7646	bpr	1207
10	reyssat	1208	if(*remote_addr==0) return 0;
		1209	snprintf(hbuf1,sizeof(hbuf1),"+%s+",remote_addr);
		1210	if(*remote_host!=0) {
5505	bpr	1211	snprintf(hbuf2,sizeof(hbuf2),"+%s+",remote_host);
		1212	for(p1=hbuf2; p1; p1++) p1=tolower(*p1);
10	reyssat	1213	}
		1214	else hbuf2[0]=0;
		1215	mystrncpy(buf,find_word_start(hlist),sizeof(buf)); strip_trailing_spaces(buf);
		1216	for(p1=buf; *p1; p1++) {
5505	bpr	1217	p1=tolower(p1);
		1218	if(!myisalnum(p1) && strchr(".-_",p1)==NULL) *p1=' ';
10	reyssat	1219	}
5505	bpr	1220	if(strcmp(buf,"all")==0) return 1; /* all is all */
10	reyssat	1221	for(p1=find_word_start(buf); *p1; p1=find_word_start(p2)) {
5505	bpr	1222	p2=find_word_end(p1); if(p2) p2++=0;
		1223	if(p2-p1<3) continue;
		1224	if(myisalnum(*p1)) pb="+"; else pb="";
		1225	if(myisalnum(*(p2-1))) pe="+"; else pe="";
		1226	snprintf(lbuf,sizeof(lbuf),"%s%s%s",pb,p1,pe);
7646	bpr	1227	for(pp=p1; pp && (myisdigit(pp) \|\| *pp=='.'); pp++);
5505	bpr	1228	if(pp) pp=hbuf2; / host name */
		1229	else pp=hbuf1; /* ip number */
		1230	if(strstr(pp,lbuf)!=NULL) return 1; /* found */
10	reyssat	1231	}
		1232	return 0;
		1233	}
		1234
8155	bpr	1235	/* return 1 if a word of bf2 is a substring of host.
		1236	* Like checkhost, but with time check.
		1237	* The content of bf2[] is destroyed.
		1238	*/
10	reyssat	1239	int checkhostt(char bf2[])
		1240	{
		1241	char p1, p2, *p3;
8155	bpr	1242	/* compare with starting time */
10	reyssat	1243	for(p1=strchr(bf2,'>'); p1!=NULL; p1=strchr(p1+1,'>')) {
5505	bpr	1244	if(p1>bf2 && !isspace(*(p1-1))) continue;
		1245	p3=find_word_start(++p1); p2=find_word_end(p3);
		1246	if(p2-p3!=14) continue;
		1247	p3[8]='.'; p3[11]=':'; if(p2) p2++=0;
		1248	if(strncmp(nowstr,p3,14)<0) return 0;
		1249	ovlstrcpy(p1-1,p2); p1-=2;
10	reyssat	1250	}
8155	bpr	1251	/* compare with ending time */
10	reyssat	1252	for(p1=strchr(bf2,'<'); p1!=NULL; p1=strchr(p1+1,'<')) {
5505	bpr	1253	if(p1>bf2 && !isspace(*(p1-1))) continue;
		1254	p3=find_word_start(++p1); p2=find_word_end(p3);
		1255	if(p2-p3!=14) continue;
		1256	p3[8]='.'; p3[11]=':'; if(p2) p2++=0;
		1257	if(strncmp(nowstr,p3,14)>0) return 0;
		1258	ovlstrcpy(p1-1,p2); p1-=2;
10	reyssat	1259	}
		1260	p1=find_word_start(bf2); if(*p1==0) return 1;
		1261	return checkhost(p1);
		1262	}
		1263
8155	bpr	1264	/* bad identification */
10	reyssat	1265	void bad_ident(void)
		1266	{
		1267	if(cookiegot[0]!=0) {
		1268	}
		1269	user_error("bad_ident");
		1270	}
		1271
		1272	void instex_flush(void)
		1273	{
		1274	char *p;
		1275	setenv("texgif_style","",1);
		1276	setenv("texgif_tmpdir",tmp_dir,1);
		1277	setenv("texgif_src",instex_src,1);
		1278	setenv("texgif_outfile",instex_fname,1);
		1279	unsetenv("w_instex_color");
		1280	getwimstexsize=0; fix_tex_size(); getwimstexsize=1;
		1281	for(p=instex_fname;p;p++) if(p=='\n') *p=' ';
		1282	wrapexec=0; call_ssh("%s/%s >%s/ins.Out 2>%s/ins.Err",
5505	bpr	1283	bin_dir,instex_processor,
		1284	tmp_dir,tmp_dir);
10	reyssat	1285	call_ssh("mv %s %s >/dev/null 2>/dev/null", instex_fname,s2_prefix);
		1286	instex_src[0]=instex_fname[0]=0; instex_cnt=0;
		1287	}
		1288
8155	bpr	1289	/* put last.phtml */
10	reyssat	1290	void putlastout(void)
		1291	{
		1292	int t;
		1293	if(instex_cnt>0) instex_flush();
		1294	t=catfile(stdout,"%s/%s",s2_prefix,lastout);
		1295	if(t==0) printf("Content-type: text/plain\r\n\r\n");
		1296	}
		1297
		1298	struct sockaddr_un sun;
		1299
8155	bpr	1300	/* returns >=0 if OK. */
7646	bpr	1301
10	reyssat	1302	int kerneld(char *p, int bufsize)
		1303	{
		1304	int sock, s, t, t1, l, *ip;
		1305	struct timeval tv;
		1306	fd_set rset;
		1307	sock=socket(PF_UNIX,SOCK_STREAM,0);
		1308	s=connect(sock,(const struct sockaddr *)&sun,sizeof(sun));
		1309	if(s) {bad: close(sock); return -1;}
		1310	ip=(int *) p;
		1311	l=strlen(p+sizeof(int)); *ip=l;
		1312	s=write(sock,p,l+sizeof(int)); if(s!=l+sizeof(int)) goto bad;
		1313	for(t=0, l=bufsize-1; t<l+sizeof(int);) {
5505	bpr	1314	tv.tv_sec=2; tv.tv_usec=0;
		1315	FD_ZERO(&rset); FD_SET(sock,&rset);
		1316	if(select(sock+1,&rset,NULL,NULL,&tv)<=0) goto bad;
7646	bpr	1317	t1=read(sock,p+t,l+sizeof(int)-t);
5505	bpr	1318	if(t1+t<sizeof(int)) goto bad;
7646	bpr	1319	if (t1 < 0) goto bad;
5505	bpr	1320	l=*ip; if(l<=0) goto bad;
		1321	if(l>=bufsize-sizeof(int)-4) user_error("cmd_output_too_long");
		1322	t+=t1;
10	reyssat	1323	}
		1324	p[l+sizeof(int)]=0;
		1325	close(sock);
		1326	return l+sizeof(int);
		1327	}
		1328
		1329	void _daemoncmd(char *p)
		1330	{
		1331	char buf[MAX_LINELEN+1+sizeof(int)];
		1332	char p1, p2, *p3;
		1333	mystrncpy(buf+sizeof(int),p,sizeof(buf)-sizeof(int));
7646	bpr	1334	if(kerneld(buf,sizeof(buf))<0)
10	reyssat	1335	internal_error("Daemon communication error.");
		1336	p1=find_word_start(buf+sizeof(int));
		1337	p2=find_word_end(p1); if(p2) p2++=0;
		1338	if(strcmp(p1,"OK")==0) {
5505	bpr	1339	mystrncpy(p,p2,MAX_LINELEN); return;
10	reyssat	1340	}
		1341	p1=find_word_start(p2); p2=find_word_end(p1); if(p2) p2++=0;
7646	bpr	1342	p2=find_word_start(p2); p3=find_word_end(p2);
10	reyssat	1343	if(*p3) {
5505	bpr	1344	*p3++=0; p3=find_word_start(p3); strip_trailing_spaces(p3);
		1345	setvar("wims_error_data",p3);
10	reyssat	1346	}
		1347	switch(*p1) {
5505	bpr	1348	case '1': user_error(p2);
		1349	case '2': module_error(p2);
		1350	case '3':
		1351	default: internal_error(p2);
10	reyssat	1352	}
		1353	*p=0;
		1354	}
		1355

Subversion Repositories wimsdev

(root)/trunk/wims/src/lines.c – Rev 11125