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="";
5505	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
5505	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
5505	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
		123	/* Internal error: panic and forget about requester. */
		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
5505	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
5505	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
5505	bpr	203	/* read-in a file into buffer. Use open() and read().
		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
7646	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;
		244	if(n>0) memmove(buf,f->lines[i].address,n); buf[n]=0;
		245	for(j=i+1;j<f->linecnt && f->lines[j].isstart==0;j++);
		246	f->l=i; f->linepointer=j;
		247	if(j>=f->linecnt && n==0) return EOF; else return n;
		248	}
		249
		250	int get_cached_file(char *name)
		251	{
		252	int i,l,flag;
		253	l=strlen(name); if(l>=127) return -1;
		254	if(strncmp(module_prefix,module_dir,strlen(module_dir))!=0) flag=8; else flag=0;
		255	for(i=0;i<mcachecnt;i++) {
5505	bpr	256	if(flag==mcache[i].nocache && strcmp(name,mcache[i].name)==0) {
		257	memmove(&m_file,mcache+i,sizeof(WORKING_FILE));
		258	m_file.nocache\|=4;
		259	return i;
		260	}
10	reyssat	261	}
		262	return -1;
		263	}
		264
5505	bpr	265	/* Open a work file. Returns 0 if OK. */
10	reyssat	266	int open_working_file(WORKING_FILE f, char fname)
		267	{
		268	char p, q;
		269	void *vp;
		270	int i,j,k,laststart,lc[LINE_LIMIT];
		271
		272	f->linecnt=f->linepointer=0;
		273	f->for_idx=f->nocache=0;
		274	f->l=-1; f->lines=NULL;
		275	f->textbuf=readfile(fname,NULL,WORKFILE_LIMIT);
		276	if(f->textbuf==NULL) return -1;
		277	p=f->textbuf; if(*p) {
5505	bpr	278	for(i=0,p--; i<LINE_LIMIT-1 && p!=NULL;p=strchr(p,'\n')) {
		279	if(i>0) *p=0;
		280	lc[i++]=(++p-f->textbuf);
		281	}
10	reyssat	282	}
		283	else i=0;
		284	if(i>=LINE_LIMIT-1) module_error("file_too_long");
		285	lc[i]=lc[i-1]+strlen(f->textbuf+lc[i-1])+1;
		286	f->textbuf[lc[i]]=0;
		287	f->linecnt=i; laststart=0;
		288	f->for_stack=xmalloc(MAX_FOR_LEVELsizeof(FOR_STACK)+(i+1)sizeof(LINE_STRUCT));
		289	vp=f->for_stack+MAX_FOR_LEVEL; f->lines=vp;
		290	for(j=0;j<i;j++) {
5505	bpr	291	f->lines[j].address=p=(f->textbuf)+lc[j];
		292	f->lines[j].llen=lc[j+1]-lc[j]-1;
		293	(f->lines[j]).execcode=(f->lines[j]).varcode=-1;
		294	if(j==0) goto normal;
		295	q=f->lines[laststart].address+f->lines[laststart].llen-1;
		296	if(q>=f->textbuf && *q=='\\') {
		297	f->lines[laststart].llen+=f->lines[j].llen; *q='\n';
		298	f->lines[j].isstart=f->lines[j].llen=0;
		299	memmove(q+1,p,lc[j+1]-lc[j]);
		300	}
		301	else {
		302	normal: for(q=p;myislspace(*q);q++);
		303	f->lines[j].isstart=1; laststart=j; k=0;
		304	switch(*q) {
		305	/* isstart: bit 1 = start.
		306	* bit 2 = exec
		307	* bit 3 (4) = label
		308	* bit 4 (8) = hard comment (!!)
		309	* bit 5 (16) = soft comment (#) */
		310	case exec_prefix_char: {
		311	if(myisalpha(q[1])) f->lines[j].isstart=3;
		312	else f->lines[j].isstart=9;
		313	k=1; break;
		314	}
		315	case label_prefix_char: {f->lines[j].isstart=5; k=1; break;}
		316	case comment_prefix_char: {f->lines[j].isstart=17; break;}
		317	default: {f->lines[j].isstart=1; break;}
		318	}
		319	if(k && q>p) {f->lines[j].address=q;f->lines[j].llen-=q-p;}
		320	}
10	reyssat	321	}
		322	f->lines[i].isstart=1; f->lines[i].llen=0;
		323	f->lines[i].address=(f->textbuf)+lc[i];
		324	mfilecnt++; return 0;
		325	}
		326
5505	bpr	327	/* close an earlier opened working file */
10	reyssat	328	void close_working_file(WORKING_FILE *f, int cache)
		329	{
		330	f->linepointer=f->l=0;
		331	if(cache && untrust==0 && mcachecnt<MAX_MCACHE && (f->nocache&7)==0) {
5505	bpr	332	memmove(mcache+mcachecnt,f,sizeof(WORKING_FILE));
		333	mcachecnt++;
10	reyssat	334	}
		335	else if((f->nocache&4)==0) {
5505	bpr	336	if(f->for_stack!=NULL) free(f->for_stack);
		337	if(f->textbuf!=NULL) free(f->textbuf);
10	reyssat	338	}
		339	f->for_stack=NULL; f->textbuf=NULL; f->linecnt=0;
		340	}
		341
		342	void free_mcache(void)
		343	{
		344	int i;
		345	untrust=0;
		346	for(i=mcachecnt-1;i>=0;i--) close_working_file(mcache+i,0);
		347	mcachecnt=0;
		348	}
		349
		350	void cleantmpdir(void);
		351	void user_error_log(char msg[]);
		352
		353	void nested_error(char msg[])
		354	{
		355	fprintf(stderr,"\nNested error! %s\n",msg);
		356	nph_header(420);
		357	printf("\r\n\r\nWIMS error processing aborted on nested error.\r\n\r\n%s\r\n",msg);
		358	delete_pid(); exit(1);
		359	}
		360
5505	bpr	361	/* Send an error message to requester and exit.
		362	* This is for user errors, language-sensitive. */
10	reyssat	363	void user_error(char msg[])
		364	{
		365	char erfname[MAX_FNAME+1];
		366
		367	if(error_status) nested_error(msg);
		368	error_status=1;
		369	mkfname(erfname,"%s.%s",user_error_msg_file,lang);
		370	if(ftest(erfname)!=is_file) internal_error("user_error(): error message file not found.\n\
		371	Bad installation.");
		372	force_setvar("wims_user_error",msg);
7646	bpr	373	if(strcmp(msg,"threshold")!=0) user_error_log(msg);
		374	memmove(module_prefix,".",2);
10	reyssat	375	if(lastout_file!=-1 && outputing) {
5505	bpr	376	flushoutput(); close(lastout_file); lastout_file=-1;
10	reyssat	377	}
		378	nph_header(450);
7646	bpr	379	phtml_put_base(erfname,0);
		380	if(strcmp(msg,"double_click")!=0) delete_pid();
10	reyssat	381	else {
5505	bpr	382	cleantmpdir(); flushlog();
10	reyssat	383	}
		384	flushoutput(); exit(0);
		385	}
		386
		387	void module_error_log(char msg[]);
		388
5505	bpr	389	/* Messages for module errors. English only. */
		390	/* This is really rudimentary for the time being. */
10	reyssat	391	void module_error(char msg[])
		392	{
		393	int send=0;
		394	char *p;
		395	WORKING_FILE mf;
		396
		397	if(error_status) nested_error(msg);
		398	error_status=1; untrust=0;
		399	module_error_log(msg);
		400	nph_header(550);
		401	printf("Server: %s %s (%s)\r\n", SHORTSWNAME,wims_version,LONGSWNAME);
		402	p=getvar("wims_main_font");
		403	if(p!=NULL && *p!=0) printf("Content-type: text/plain; charset=%s\r\n\r\n",p);
		404	else printf("Content-type: text/plain\r\n\r\n");
		405	p=getvar(ro_name[ro_module]); if(p==NULL) p="???";
		406	printf("ERROR.\n\nwims has detected an error in the module '%s'.",p);
		407	if(m_file.l>=0) printf("\n\nIn file '%s', line %d:",
5505	bpr	408	m_file.name,m_file.l+1);
10	reyssat	409	printf(" %s.\n\n",msg);
		410	if(open_working_file(&mf,mkfname(NULL,"%s.%s",module_error_msg_file,lang))!=0)
		411	internal_error("module_error(): error message file not found.");
		412	while(wgetline(tmplbuf,MAX_LINELEN,&mf)!=EOF) {
5505	bpr	413	if(tmplbuf[0]!=tag_prefix_char) {
		414	if(send) {substit(tmplbuf); puts(tmplbuf);}
		415	continue;
		416	}
		417	strip_trailing_spaces(tmplbuf);
		418	if(tmplbuf[1]==0 \|\| strcmp(msg,tmplbuf+1)==0) send=1;
		419	else send=0;
10	reyssat	420	}
		421	close_working_file(&mf,0);
		422	outptr=outbuf; delete_pid(); exit(1);
		423	}
		424
5505	bpr	425	/* Output kernel routine */
10	reyssat	426	void _output_(char *s)
		427	{
		428	int l,l2;
		429	l=strlen(s); output_length+=l;
		430	if(output_length>=OUTPUT_LENGTH_LIMIT) {
5505	bpr	431	module_error("output_too_long"); return;
10	reyssat	432	}
		433	l2=sizeof(outbuf)-(outptr-outbuf);
		434	put: if(l<=l2) {
5505	bpr	435	memmove(outptr,s,l); outptr+=l; return;
10	reyssat	436	}
		437	memmove(outptr,s,l2); s+=l2; l-=l2;
3843	kbelabas	438	if(lastout_file!=-1) (void)write(lastout_file,outbuf,sizeof(outbuf));
10	reyssat	439	else fwrite(outbuf,sizeof(outbuf),1,stdout);
		440	outptr=outbuf; l2=sizeof(outbuf); goto put;
		441	}
		442
5505	bpr	443	/* Output with no var. */
10	reyssat	444	void output0(char buf[])
		445	{
		446	char p1, p2, *ps;
		447	int dynsave;
		448	if(backslash_insmath) {
5505	bpr	449	ps=buf; dynsave=instex_usedynamic;
		450	for(p1=strstr(buf,"\\("); p1; p1=strstr(p2,"\\(")) {
		451	p2=find_matching(p1+2,')');
		452	if(p2==NULL) break;
		453	if(p1>buf && *(p1-1)=='\\') continue;
		454	p1=0; if((p2-1)=='\\') (p2-1)=0; p2++=0; _output_(ps); ps=p2;
		455	instex_usedynamic=1; insmath(p1+2);
		456	}
		457	if(*ps) _output_(ps); instex_usedynamic=dynsave;
10	reyssat	458	}
		459	else _output_(buf);
		460	}
		461
5505	bpr	462	/* Output routine */
10	reyssat	463	void output(char *s,...)
		464	{
		465	va_list vp;
		466	char buf[4*MAX_LINELEN+1];
		467
		468	va_start(vp,s);
		469	vsnprintf(buf,sizeof(buf),s,vp);
		470	va_end(vp);
		471	output0(buf);
		472	}
		473
5505	bpr	474	/* read in tmpf in tmp directory, and places in p.
		475	* Maximal length: MAX_LINELEN. */
10	reyssat	476	void read_tmp_file(char p, const char fname)
		477	{
		478	char name, pp;
		479	name=mkfname(NULL,"%s/%s",tmp_dir,fname);
		480	if(!exec_is_module \|\| !outputing \|\| !direct_exec
		481	\|\| strcmp(fname,"exec.out")!=0) {
5505	bpr	482	readfile(name,p,MAX_LINELEN);
		483	pp=getvar("wims_exec_dollar_double");
		484	if(pp && strcmp(pp,"yes")==0) {
		485	for(pp=strchr(p,'$'); pp; pp=strchr(pp+2,'$'))
		486	string_modify(p,pp,pp+1,"$$");
		487	}
10	reyssat	488	}
		489	else {
5505	bpr	490	char *s;
		491	s=readfile(name,NULL,OUTPUT_LENGTH_LIMIT);
		492	if(s==NULL) {*p=0; return;}
		493	if(memcmp(s,"Error: ", strlen("Error: "))==0) mystrncpy(p,s,MAX_LINELEN);
		494	output_length+=strlen(s);
		495	if(output_length>=OUTPUT_LENGTH_LIMIT) module_error("output_too_long");
		496	else _output_(s);
		497	free(s); *p=0;
		498	chmod(name,S_IRUSR\|S_IWUSR);
10	reyssat	499	}
		500	}
		501
5505	bpr	502	/* verify whether the module is trusted.
		503	* Returns 1 if yes, 0 if no. -1 for error. */
10	reyssat	504	int trusted_module(void)
		505	{
		506	char modname, w, buf[MAX_LINELEN+1];
		507	int i,n;
5505	bpr	508	static int _trusted=-1; /* avoid repeated computations */
7646	bpr	509
10	reyssat	510	if(untrust&255) return 0;
		511	if(_trusted>=0) return _trusted;
		512	modname=getvar(ro_name[ro_module]);
		513	if(modname==NULL \|\| *modname==0) return 0;
7646	bpr	514	if(memcmp(modname,"adm/",strlen("adm/"))==0 \|\|
		515	memcmp(modname,"classes/",strlen("classes/"))==0 \|\|
10	reyssat	516	strcmp(modname,home_module)==0 \|\|
		517	memcmp(modname,"help/",strlen("help/"))==0) {
5505	bpr	518	tr:
		519	if(memcmp(modname,"classes/",strlen("classes/"))==0)
		520	is_class_module=1;
		521	setenv("trusted_module","yes",1);
		522	return _trusted=1;
10	reyssat	523	}
		524	n=wordnum(trusted_modules); for(i=0;i<n;i++) {
5505	bpr	525	w=fnd_word(trusted_modules,i+1,buf);
		526	if(strcmp(w,modname)==0) goto tr;
10	reyssat	527	}
		528	return _trusted=0;
		529	}
		530
7646	bpr	531	/* file should be in the module directory, but
5505	bpr	532	* it may also be somewhere else.
		533	* buf[] requires MAX_FNAME+1 length.
		534	* Returns 0 if found. */
10	reyssat	535	int find_module_file(char *fname, char buf[], int mode)
		536	{
		537	char *p, dtest[32];
7646	bpr	538
10	reyssat	539	fname=find_word_start(fname);
		540	if(*fname==0) return -1;
5505	bpr	541	/* Name checking: no directory backtracing. */
10	reyssat	542	if(strstr(fname,parent_dir_string)!=NULL) {
5505	bpr	543	setvar(error_data_string,fname); module_error("illegal_fname");
		544	return -1;
10	reyssat	545	}
		546	p=strchr(fname,'/'); if(p==NULL \|\| p>fname+10) goto openit;
		547	memmove(dtest,fname,p-fname); dtest[p-fname]=0;
		548	if(strcmp(dtest,"datamodule")==0) {
5505	bpr	549	mkfname(buf,"modules/data%s",p); goto lastopen;
10	reyssat	550	}
		551	if(strcmp(dtest,"wimshome")==0 && trusted_module()) {
5505	bpr	552	mkfname(buf,"%s%s",getvar("wims_home"),p); goto lastopen;
10	reyssat	553	}
		554	if(strcmp(dtest,"writable")==0) {
5505	bpr	555	if(strncmp(p+1,"TEMP_",5)==0 && strchr(p+1,'/')==NULL) {
		556	mkfname(buf,"%s/%s",tmp_dir,p+1);
		557	}
		558	else {
		559	mkfname(buf,"w/%s/%s",module_prefix,p+1);
		560	}
7646	bpr	561	untrust\|=4;
10	reyssat	562	}
		563	else {
5505	bpr	564	openit: mkfname(buf,"%s/%s",module_prefix,fname);
10	reyssat	565	}
		566	if(mode) return 0;
		567	if(ftest(buf)!=is_file) {
5505	bpr	568	if(lastftype==is_exec) {
10	reyssat	569	isexec:
5505	bpr	570	setvar("executable",fname); module_error("executable");
		571	return -1;
		572	}
7646	bpr	573	if(strncmp(fname,"adm/",4)==0 &&
5505	bpr	574	(!trusted_module() \|\| is_class_module)) return -1;
		575	mkfname(buf,"scripts/%s",fname);
		576	lastopen:
		577	if(mode) return 0;
		578	if(ftest(buf)!=is_file) {
		579	if(lastftype==is_exec) goto isexec;
		580	else return -1;
		581	}
10	reyssat	582	}
		583	return 0;
		584	}
		585
5505	bpr	586	/* check whether a file is user-submitted */
		587	/* This is deprecated because of the wimshome/ method. */
10	reyssat	588	/* int user_file(char *name) {
		589	if(name[0]=='/' \|\| name[0]=='.' \|\|
7646	bpr	590	strstr(name,"classes/")!=NULL \|\|
10	reyssat	591	strstr(name,"forums/")!=NULL \|\|
		592	strstr(name,"sessions/")!=NULL \|\|
		593	strstr(name,"doc/")!=NULL) return 1; else return 0;
		594	} */
		595
5505	bpr	596	/* returns 1 if violation */
10	reyssat	597	int datafile_check(char *name) {
		598	if((untrust&255)==0) return 0;
		599	if(strncmp(name,"data/",strlen("data/"))==0) return 0;
		600	if(strncmp(name,"authors/",strlen("authors/"))==0) return 0;
5333	bpr	601	if(strncmp(name,"datamodule/",strlen("datamodule/"))==0) return 0;
10	reyssat	602	return 1;
		603	}
		604
5505	bpr	605	/* returns 0 if success */
10	reyssat	606	void readdatafile(char *name)
		607	{
		608	char *pp;
		609	if(strcmp(name,lastdatafile)==0) return;
		610	lastdata[0]=0; readfile(name,lastdata,WORKFILE_LIMIT);
		611	mystrncpy(lastdatafile,name,sizeof(lastdatafile));
		612	datacache[0]=lastdata; nextdatacache=1;
		613	if(lastdata[0]==tag_string[1]) {
5505	bpr	614	datacache[1]=lastdata; nextdatacache++;
10	reyssat	615	}
		616	pp=strstr(lastdata,tag_string);
		617	if(pp) datacache[nextdatacache]=pp;
		618	else datacache[nextdatacache]=lastdata+strlen(lastdata);
		619	}
		620
		621	char _nextdata(char p)
		622	{
		623	char *pp;
		624	if(!*p) return p;
		625	pp=strstr(p,tag_string);
		626	if(pp) return pp;
		627	else return p+strlen(p);
		628	}
		629
5505	bpr	630	/* datafile structure: number of records.
		631	* tag=1 if direct access */
10	reyssat	632	unsigned int datafile_recordnum(char *p)
		633	{
		634	char nbuf[MAX_LINELEN+1], *pp;
		635	int i, t, ret;
		636
		637	t=untrust; ret=0;
		638	if(direct_datafile) mystrncpy(nbuf,p,sizeof(nbuf));
		639	else if(datafile_check(p)!=0 \|\| find_module_file(p,nbuf,0)) goto ret;
7646	bpr	640	readdatafile(nbuf);
10	reyssat	641	for(i=nextdatacache, pp=datacache[i]; *pp;) {
5505	bpr	642	pp=_nextdata(pp+1); i++;
		643	if(i<DATAFIELD_LIMIT) {
		644	datacache[i]=pp; nextdatacache=i;
		645	}
10	reyssat	646	}
		647	ret=i-1;
		648	ret:
		649	untrust=t;
		650	return ret;
		651	}
		652
5505	bpr	653	/* datafile structure: find record n, starting from 1 */
10	reyssat	654	char datafile_fnd_record(char p, int n, char bf[])
		655	{
		656	char nbuf[MAX_LINELEN+1], pp, p2;
		657	int i, t;
		658
		659	bf[0]=0; t=untrust;
		660	if(n<0) goto ret;
		661	if(direct_datafile) mystrncpy(nbuf,p,sizeof(nbuf));
		662	else if(datafile_check(p)!=0 \|\| find_module_file(p,nbuf,0)) goto ret;
		663	readdatafile(nbuf); if(*lastdata==0) goto ret;
		664	if(n>nextdatacache) {
5505	bpr	665	for(i=nextdatacache, pp=datacache[i]; i<n && *pp;) {
		666	pp=_nextdata(pp+1); i++;
		667	if(i<DATAFIELD_LIMIT) {
		668	datacache[i]=pp; nextdatacache=i;
		669	}
		670	}
10	reyssat	671	}
		672	else pp=datacache[n];
		673	if(!*pp) goto ret;
		674	if(n>1 \|\| (n==1 && *pp!=tag_string[1])) pp+=strlen(tag_string);
		675	else if(n==1) pp+=strlen(tag_string)-1;
		676	if(n<nextdatacache) p2=datacache[n+1];
		677	else {
5505	bpr	678	p2=strstr(pp,tag_string); if(p2==NULL) p2=pp+strlen(pp);
		679	if(n<DATAFIELD_LIMIT-1 && n==nextdatacache) {
		680	nextdatacache++; datacache[nextdatacache]=p2;
		681	}
10	reyssat	682	}
		683	if(p2-pp>=MAX_LINELEN) p2=pp+MAX_LINELEN-1;
		684	if(p2<pp) p2=pp;
		685	memmove(bf,pp,p2-pp); bf[p2-pp]=0;
		686	ret:
		687	untrust=t; return bf;
		688	}
		689
		690	char hex2char(char c1, char c2)
		691	{
		692	char tbuf[16];
		693	if(c1<'0' \|\| c1>'f' \|\| c2<'0' \|\| c2>'f') {
		694	invl:
5505	bpr	695	snprintf(tbuf,sizeof(tbuf),"%%%c%c",c1,c2);
		696	setvar(error_data_string,tbuf);
		697	user_error("invalid_char_in_query_string");
10	reyssat	698	}
		699	c1=toupper(c1);c2=toupper(c2);
		700	if(c1>'9' && c1<'A') goto invl;
		701	if(c2>'9' && c2<'A') goto invl;
		702	if(c1>'F' \|\| c2>'F') goto invl;
		703	if(c1>='A') c1=c1-'A'+'9'+1;
		704	if(c2>='A') c2=c2-'A'+'9'+1;
		705	return (c1-'0')*16+c2-'0';
		706	}
		707
5505	bpr	708	/* Converts back http escaped chars, slight. Does not check buffer length.
		709	* Returns converted string length. */
10	reyssat	710	int _http2env(char outs[], char ins[])
		711	{
		712	int j,k,l;
		713	l=strlen(ins);
		714	for(j=k=0;j<l && !isspace(ins[j]);j++,k++) {
5505	bpr	715	if(isspace(ins[j])) { /* skip space characters in query string */
		716	k--;continue;
		717	}
		718	if(ins[j]=='%') {
		719	/* skip Carriage-Return. */
		720	if(ins[j+1]=='0' && (ins[j+2]=='d' \|\| ins[j+2]=='D')) {
		721	j+=2; k--; continue;
		722	}
		723	outs[k]=hex2char(ins[j+1],ins[j+2]);
		724	j+=2; continue;
		725	}
		726	outs[k]=ins[j];
10	reyssat	727	}
7646	bpr	728	outs[k]=0;
10	reyssat	729	return k;
		730	}
		731
5505	bpr	732	/* Converts back http escaped chars. Does not check buffer length.
		733	* Returns converted string length. */
10	reyssat	734	int http2env(char outs[], char ins[])
		735	{
		736	int j,k,l;
		737	l=strlen(ins);
		738	for(j=k=0;j<l && !isspace(ins[j]);j++,k++) {
5505	bpr	739	if(isspace(ins[j])) { /* skip space characters in query string */
		740	k--;continue;
		741	}
		742	if(ins[j]=='%') {
		743	/* skip Carriage-Return. */
		744	if(ins[j+1]=='0' && (ins[j+2]=='d' \|\| ins[j+2]=='D')) {
		745	j+=2; k--; continue;
		746	}
		747	outs[k]=hex2char(ins[j+1],ins[j+2]);
		748	j+=2; continue;
		749	}
		750	if(ins[j]=='+') {
		751	outs[k]=' '; continue;
		752	}
		753	if(ins[j]=='?' \|\| ins[j]=='&') {
		754	outs[k]=0; continue;
		755	}
		756	outs[k]=ins[j];
10	reyssat	757	}
7646	bpr	758	outs[k]=0;
10	reyssat	759	return k;
		760	}
		761
5505	bpr	762	/* translate a string to http querystring style.
		763	* '&' is not translated.
		764	* Buffer p must be at least MAX_LINELEN. */
10	reyssat	765	void tohttpquery(char *p)
		766	{
		767	char trlist[]=" ()[]{}+-*^\|/\"\'!:;,<>\n";
		768	char *pp;
		769	for(pp=p;*pp;pp++) {
5505	bpr	770	if(*pp==' ') {
		771	*pp='+'; continue;
		772	}
		773	if(strchr(trlist,*pp)==NULL) continue;
		774	if(pp=='+' && pp>p && (pp-1)=='&') continue;
		775	if(pp>p && *(pp-1)=='\\') {
		776	ovlstrcpy(pp-1,pp);pp--;continue;
		777	}
		778	if(*pp=='\n') {
		779	string_modify(p,pp,pp+1,"%%0D%%0A");pp+=5;
		780	}
		781	else {
		782	string_modify(p,pp,pp+1,"%%%02X",*pp);pp+=2;
		783	}
10	reyssat	784	}
		785	}
		786
5505	bpr	787	/* substitute backslash parameters. Internal use only. */
10	reyssat	788	void slashsubst(char *p)
		789	{
		790	char p1, p2, pt, pp, namebuf[128];
		791	int n;
		792
		793	n=strlen(mathfont_prefix); memmove(namebuf,mathfont_prefix,n+1);
		794	for(p1=strchr(p,'\\'); p1!=NULL; p1=strchr(p1,'\\')) {
5505	bpr	795	p1++; for(p2=p1; myisalnum(p2) \|\| p2=='_'; p2++);
		796	if(p2<=p1 \|\| p2>p1+100) continue;
		797	memmove(namebuf+n,p1,p2-p1); namebuf[p2-p1+n]=0;
		798	pt=_getvar(namebuf); if(pt==NULL) continue;
		799	if(*p2=='[' && (pp=find_matching(p2+1,']'))!=NULL) {
		800	string_modify(p,pp+1,pp+1,")");
		801	string_modify(p,p1-1,p1,"$(%s",mathfont_prefix);
		802	}
		803	else string_modify(p,p1-1,p1,"$%s",mathfont_prefix);
10	reyssat	804	}
		805	}
		806
5505	bpr	807	/* two alarm handlers. */
10	reyssat	808	void alarm1(int s)
		809	{
		810	if(killpid>0 && kill(killpid,SIGKILL)) module_error("timeup");
		811	killpid=0;
		812	}
		813
		814	void alarm2(int s)
		815	{
		816	cleantmpdir();
		817	alarm1(s); module_error("timeup");
		818	}
		819
		820	void finalalarm(void)
		821	{
		822	time_t curr;
		823	curr=time(0);
		824	if(curr>=limtime) alarm2(SIGALRM);
		825	errno=0;
		826	if(signal(SIGALRM,alarm2)==SIG_ERR)
		827	internal_error(strerror(errno));
		828	alarm(limtime-curr+1);
		829	}
		830
		831	void initalarm(void)
		832	{
		833	limtimex=nowtime+4*rlimit_cpu/3;
		834	limtime=limtimex+2; finalalarm();
		835	}
		836
		837	void forkalarm(void)
		838	{
		839	time_t curr;
		840	curr=time(0);
		841	if(curr>=limtimex) {alarm1(SIGALRM); return;}
		842	if(signal(SIGALRM,alarm1)==SIG_ERR)
		843	internal_error(strerror(errno));
		844	alarm(limtimex-curr+1);
		845	}
		846
5505	bpr	847	/* create pid tag */
10	reyssat	848	void create_pid(void)
		849	{
		850	char buf[MAX_FNAME+1], pbuf[256], obuf[MAX_FNAME+1];
		851	struct stat dst;
		852	struct utimbuf ub;
7646	bpr	853
10	reyssat	854	if(robot_access \|\| *session_prefix==0) return;
		855	if(cmd_type==cmd_getframe) return;
		856	mkfname(buf,"%s/.pid",s2_prefix);
5505	bpr	857	/* another process running? */
10	reyssat	858	if(readfile(buf,pbuf,sizeof(pbuf))!=NULL) {
5505	bpr	859	mkfname(obuf,"/proc/%s",pbuf);
		860	if(stat(obuf,&dst)==0) user_error("double_click");
10	reyssat	861	}
		862	snprintf(pidbuf,sizeof(pidbuf),"%u",getpid());
		863	accessfile(pidbuf,"w","%s",buf);
5505	bpr	864	/* Touch session time */
10	reyssat	865	if(strstr(session_prefix,"sessions/")==NULL) return;
		866	ub.actime=ub.modtime=nowtime;
		867	utime(session_prefix,&ub);
		868	if(strchr(session_prefix,'_')!=NULL) { /* touch parent too */
5505	bpr	869	char sbuf[MAX_FNAME+1], *p;
		870	mystrncpy(sbuf,session_prefix,sizeof(sbuf));
		871	p=strchr(sbuf,'_'); if(p!=NULL) *p=0;
		872	utime(sbuf,&ub);
10	reyssat	873	}
		874	}
		875
8185	bpr	876	struct mxtab mxtab[MAX_MULTIEXEC];
10	reyssat	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) {
5505	bpr	886	if(errf!=NULL)
		887	accessfile("No time left to execute subprograms.\n","w","%s",errf);
		888	return -100;
10	reyssat	889	}
		890	lastdatafile[0]=lastftest[0]=0;
5505	bpr	891	fflush(NULL); /* flush all output streams before forking
		892	* otherwise they will be doubled */
10	reyssat	893	pid=fork(); if(pid==-1) return -1;
5505	bpr	894	if(!pid) { /* child */
		895	char buf[MAX_LINELEN+1]; int k;
		896	(void)nice(10); /* lower priority for children */
		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 {
		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);
		906	}
7646	bpr	907	/* This is to patch LinuxPPC uid wrapping
5505	bpr	908	* for scripts */
		909	t=0; if(strchr(cmdf,'/')) {
		910	int tf;
		911	char tbuf[16];
		912	tf=open(cmdf,O_RDONLY); (void)read(tf,tbuf,8); close(tf);
		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);
10	reyssat	933	}
5505	bpr	934	else { /* parent */
7646	bpr	935	wrapexec=0; status=0;
5505	bpr	936	if(exec_wait && !is_multiexec) {
		937	killpid=pid; forkalarm();
		938	waitpid(pid,&status,0); killpid=0; finalalarm();
		939	}
		940	return WEXITSTATUS(status);
10	reyssat	941	}
		942	}
		943
5505	bpr	944	/* preparation for resident execution.
		945	* Returns 1 if already up, otherwise 0. */
10	reyssat	946	int multiexec(char cmd, char *abuf)
		947	{
		948	char *p;
		949	int i;
7646	bpr	950
10	reyssat	951	if(robot_access) return 0;
		952	if(strstr(tmp_dir,"sessions/")==NULL) return 0;
7646	bpr	953	if(strstr(tmp_debug,"yes")!=NULL && checkhost(manager_site)>=1)
10	reyssat	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]) {
5505	bpr	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);
10	reyssat	963	}
		964	for(i=0;i<mxno && strcmp(cmd,mxtab[i].cmd)!=0; i++);
		965	multiexec_index=i;
		966	if(i==mxno) {
5505	bpr	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);
10	reyssat	975	}
		976	is_multiexec=0;
		977	return 1;
		978	}
		979
5505	bpr	980	/* my system(), but with variable parms
		981	* More secure than system(), and direct fork. */
10	reyssat	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)) {
5505	bpr	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	}
10	reyssat	1029	}
		1030	arg[i]=NULL;
		1031	return execredirected(cmdf,inf,outf,errf,arg);
		1032	}
		1033
5505	bpr	1034	/* Read/write to a file with variable parms to print filename */
10	reyssat	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) {
5505	bpr	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;
10	reyssat	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
5505	bpr	1058	/* system(), but with variable parms
		1059	* Uses sh to execute command. */
10	reyssat	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
5505	bpr	1078	if(name==0) goto nothing; / this would create segfault. */
10	reyssat	1079	for(p1=strstr(buf,name); p1!=NULL; p1=strstr(p1+1,name)) {
5505	bpr	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;
10	reyssat	1100	}
		1101	nothing:
		1102	value[0]=0; return;
		1103	}
		1104
8155	bpr	1105	/* Get variable definition from a file.
		1106	* Result stored in buffer value of length MAX_LINELEN.
		1107	*/
10	reyssat	1108	void getdef(char fname, char name, char value[])
		1109	{
		1110	char buf[MAX_LINELEN+1], tbuf[MAX_LINELEN+1], nbuf[MAX_NAMELEN+1];
		1111	char p1, p2;
		1112
		1113	value[0]=0; if(readfile(fname,buf,sizeof(buf)-16)==NULL) return;
		1114	mystrncpy(value,name,MAX_LINELEN);
		1115	for(p1=value; *p1; p1=p2) {
5505	bpr	1116	while(p1 && !myisalnum(p1) && *p1!='_') p1++;
		1117	if(*p1==0) break;
		1118	for(p2=p1; myisalnum(p2) \|\| p2=='_'; p2++);
		1119	if(p2-p1>MAX_NAMELEN) continue;
		1120	memmove(nbuf,p1,p2-p1); nbuf[p2-p1]=0;
		1121	_getdef(buf,nbuf,tbuf);
		1122	string_modify(value,p1,p2,"%s",tbuf);
		1123	p2=p1+strlen(tbuf);
10	reyssat	1124	}
		1125	}
		1126
		1127	int _setdef_changed;
		1128
		1129	void _setdef(char buf[], char name, char value)
		1130	{
		1131	char p1, p2, *p3;
		1132	int n;
7646	bpr	1133
10	reyssat	1134	for(p1=strstr(buf,name); p1!=NULL; p1=strstr(p1+1,name)) {
5505	bpr	1135	p2=find_word_start(p1+strlen(name));
		1136	if((p1>buf && !isspace((p1-1))) \|\| p2!='=') continue;
		1137	p3=p1; while(p3>buf && *(p3-1)==' ') p3--;
		1138	if(p3>buf && *(p3-1)!='\n') continue;
		1139	p2++;p3=strchr(p2,'\n'); if(p3==NULL) p3=p2+strlen(p2);
		1140	if(strlen(value)!=p3-p2 \|\| strncmp(value,p2,p3-p2)!=0) {
		1141	string_modify(buf,p2,p3,"%s",value);
		1142	_setdef_changed++;
		1143	}
		1144	return;
10	reyssat	1145	}
		1146	n=strlen(buf);
7646	bpr	1147	if(n>0 && buf[n-1]!='\n')
10	reyssat	1148	snprintf(buf+n,MAX_LINELEN-n,"\n%s=%s\n",name,value);
		1149	else
		1150	snprintf(buf+n,MAX_LINELEN-n,"%s=%s\n",name,value);
		1151	_setdef_changed++;
		1152	}
		1153
8155	bpr	1154	/* Set variable definition to a file. */
10	reyssat	1155	void setdef(char fname, char name)
		1156	{
		1157	char buf[MAX_LINELEN+1];
		1158	char p1, p2, *p3;
		1159
		1160	_setdef_changed=0;
		1161	if(strchr(name,'=')==NULL) return;
		1162	for(p1=name;*p1;p1++) {
5505	bpr	1163	if(isspace(p1) && p1!=' ' && p1!='\n') p1=' ';
		1164	if(*p1==' ') {
		1165	for(p2=p1+1; isspace(p2) && p2!='\n'; p2++);
		1166	if(p2>p1+1) ovlstrcpy(p1+1,p2);
		1167	p2=p1+1; if(p2=='=' \|\| p2=='\n') ovlstrcpy(p1,p2);
		1168	}
10	reyssat	1169	}
		1170	if(readfile(fname,buf,sizeof(buf))==NULL) buf[0]=0;
		1171	for(p1=find_word_start(name); p1!=NULL; p1=p2) {
5505	bpr	1172	p2=strchr(p1,'\n'); if(p2!=NULL) *p2++=0;
		1173	p1=find_word_start(p1);
		1174	p3=strchr(p1,'='); if(p3==NULL) continue;
		1175	*p3++=0; p3=find_word_start(p3);
		1176	_setdef(buf,p1,p3);
10	reyssat	1177	}
		1178	if(_setdef_changed) accessfile(buf,"w","%s",fname);
		1179	}
		1180
8155	bpr	1181	/* check whether connecting host is part of given list.
		1182	* Returns 0 if no, 1 if yes.
		1183	*/
10	reyssat	1184	int checkhost(char *hlist)
		1185	{
		1186	char buf[MAX_LINELEN+1];
		1187	char lbuf[1024], hbuf1[256], hbuf2[256];
		1188	char p1, p2, pb, pe, *pp;
7646	bpr	1189
10	reyssat	1190	if(*remote_addr==0) return 0;
		1191	snprintf(hbuf1,sizeof(hbuf1),"+%s+",remote_addr);
		1192	if(*remote_host!=0) {
5505	bpr	1193	snprintf(hbuf2,sizeof(hbuf2),"+%s+",remote_host);
		1194	for(p1=hbuf2; p1; p1++) p1=tolower(*p1);
10	reyssat	1195	}
		1196	else hbuf2[0]=0;
		1197	mystrncpy(buf,find_word_start(hlist),sizeof(buf)); strip_trailing_spaces(buf);
		1198	for(p1=buf; *p1; p1++) {
5505	bpr	1199	p1=tolower(p1);
		1200	if(!myisalnum(p1) && strchr(".-_",p1)==NULL) *p1=' ';
10	reyssat	1201	}
5505	bpr	1202	if(strcmp(buf,"all")==0) return 1; /* all is all */
10	reyssat	1203	for(p1=find_word_start(buf); *p1; p1=find_word_start(p2)) {
5505	bpr	1204	p2=find_word_end(p1); if(p2) p2++=0;
		1205	if(p2-p1<3) continue;
		1206	if(myisalnum(*p1)) pb="+"; else pb="";
		1207	if(myisalnum(*(p2-1))) pe="+"; else pe="";
		1208	snprintf(lbuf,sizeof(lbuf),"%s%s%s",pb,p1,pe);
7646	bpr	1209	for(pp=p1; pp && (myisdigit(pp) \|\| *pp=='.'); pp++);
5505	bpr	1210	if(pp) pp=hbuf2; / host name */
		1211	else pp=hbuf1; /* ip number */
		1212	if(strstr(pp,lbuf)!=NULL) return 1; /* found */
10	reyssat	1213	}
		1214	return 0;
		1215	}
		1216
8155	bpr	1217	/* return 1 if a word of bf2 is a substring of host.
		1218	* Like checkhost, but with time check.
		1219	* The content of bf2[] is destroyed.
		1220	*/
10	reyssat	1221	int checkhostt(char bf2[])
		1222	{
		1223	char p1, p2, *p3;
8155	bpr	1224	/* compare with starting time */
10	reyssat	1225	for(p1=strchr(bf2,'>'); p1!=NULL; p1=strchr(p1+1,'>')) {
5505	bpr	1226	if(p1>bf2 && !isspace(*(p1-1))) continue;
		1227	p3=find_word_start(++p1); p2=find_word_end(p3);
		1228	if(p2-p3!=14) continue;
		1229	p3[8]='.'; p3[11]=':'; if(p2) p2++=0;
		1230	if(strncmp(nowstr,p3,14)<0) return 0;
		1231	ovlstrcpy(p1-1,p2); p1-=2;
10	reyssat	1232	}
8155	bpr	1233	/* compare with ending time */
10	reyssat	1234	for(p1=strchr(bf2,'<'); p1!=NULL; p1=strchr(p1+1,'<')) {
5505	bpr	1235	if(p1>bf2 && !isspace(*(p1-1))) continue;
		1236	p3=find_word_start(++p1); p2=find_word_end(p3);
		1237	if(p2-p3!=14) continue;
		1238	p3[8]='.'; p3[11]=':'; if(p2) p2++=0;
		1239	if(strncmp(nowstr,p3,14)>0) return 0;
		1240	ovlstrcpy(p1-1,p2); p1-=2;
10	reyssat	1241	}
		1242	p1=find_word_start(bf2); if(*p1==0) return 1;
		1243	return checkhost(p1);
		1244	}
		1245
8155	bpr	1246	/* bad identification */
10	reyssat	1247	void bad_ident(void)
		1248	{
		1249	if(cookiegot[0]!=0) {
		1250	}
		1251	user_error("bad_ident");
		1252	}
		1253
		1254	void instex_flush(void)
		1255	{
		1256	char *p;
		1257	setenv("texgif_style","",1);
		1258	setenv("texgif_tmpdir",tmp_dir,1);
		1259	setenv("texgif_src",instex_src,1);
		1260	setenv("texgif_outfile",instex_fname,1);
		1261	unsetenv("w_instex_color");
		1262	getwimstexsize=0; fix_tex_size(); getwimstexsize=1;
		1263	for(p=instex_fname;p;p++) if(p=='\n') *p=' ';
		1264	wrapexec=0; call_ssh("%s/%s >%s/ins.Out 2>%s/ins.Err",
5505	bpr	1265	bin_dir,instex_processor,
		1266	tmp_dir,tmp_dir);
10	reyssat	1267	call_ssh("mv %s %s >/dev/null 2>/dev/null", instex_fname,s2_prefix);
		1268	instex_src[0]=instex_fname[0]=0; instex_cnt=0;
		1269	}
		1270
8155	bpr	1271	/* put last.phtml */
10	reyssat	1272	void putlastout(void)
		1273	{
		1274	int t;
		1275	if(instex_cnt>0) instex_flush();
		1276	t=catfile(stdout,"%s/%s",s2_prefix,lastout);
		1277	if(t==0) printf("Content-type: text/plain\r\n\r\n");
		1278	}
		1279
		1280	struct sockaddr_un sun;
		1281
8155	bpr	1282	/* returns >=0 if OK. */
7646	bpr	1283
10	reyssat	1284	int kerneld(char *p, int bufsize)
		1285	{
		1286	int sock, s, t, t1, l, *ip;
		1287	struct timeval tv;
		1288	fd_set rset;
		1289	sock=socket(PF_UNIX,SOCK_STREAM,0);
		1290	s=connect(sock,(const struct sockaddr *)&sun,sizeof(sun));
		1291	if(s) {bad: close(sock); return -1;}
		1292	ip=(int *) p;
		1293	l=strlen(p+sizeof(int)); *ip=l;
		1294	s=write(sock,p,l+sizeof(int)); if(s!=l+sizeof(int)) goto bad;
		1295	for(t=0, l=bufsize-1; t<l+sizeof(int);) {
5505	bpr	1296	tv.tv_sec=2; tv.tv_usec=0;
		1297	FD_ZERO(&rset); FD_SET(sock,&rset);
		1298	if(select(sock+1,&rset,NULL,NULL,&tv)<=0) goto bad;
7646	bpr	1299	t1=read(sock,p+t,l+sizeof(int)-t);
5505	bpr	1300	if(t1+t<sizeof(int)) goto bad;
7646	bpr	1301	if (t1 < 0) goto bad;
5505	bpr	1302	l=*ip; if(l<=0) goto bad;
		1303	if(l>=bufsize-sizeof(int)-4) user_error("cmd_output_too_long");
		1304	t+=t1;
10	reyssat	1305	}
		1306	p[l+sizeof(int)]=0;
		1307	close(sock);
		1308	return l+sizeof(int);
		1309	}
		1310
		1311	void _daemoncmd(char *p)
		1312	{
		1313	char buf[MAX_LINELEN+1+sizeof(int)];
		1314	char p1, p2, *p3;
		1315	mystrncpy(buf+sizeof(int),p,sizeof(buf)-sizeof(int));
7646	bpr	1316	if(kerneld(buf,sizeof(buf))<0)
10	reyssat	1317	internal_error("Daemon communication error.");
		1318	p1=find_word_start(buf+sizeof(int));
		1319	p2=find_word_end(p1); if(p2) p2++=0;
		1320	if(strcmp(p1,"OK")==0) {
5505	bpr	1321	mystrncpy(p,p2,MAX_LINELEN); return;
10	reyssat	1322	}
		1323	p1=find_word_start(p2); p2=find_word_end(p1); if(p2) p2++=0;
7646	bpr	1324	p2=find_word_start(p2); p3=find_word_end(p2);
10	reyssat	1325	if(*p3) {
5505	bpr	1326	*p3++=0; p3=find_word_start(p3); strip_trailing_spaces(p3);
		1327	setvar("wims_error_data",p3);
10	reyssat	1328	}
		1329	switch(*p1) {
5505	bpr	1330	case '1': user_error(p2);
		1331	case '2': module_error(p2);
		1332	case '3':
		1333	default: internal_error(p2);
10	reyssat	1334	}
		1335	*p=0;
		1336	}
		1337

Subversion Repositories wimsdev

(root)/trunk/wims/src/lines.c – Rev 8185