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	{
12242	bpr	67	va_list vp;
		68	char buf[MAX_LINELEN+1];
10	reyssat	69
12242	bpr	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);
10	reyssat	75	}
		76
		77
8343	bpr	78	/* HTTP response header for non-processed CGI interface */
10	reyssat	79	void nph_header(int code)
		80	{
12242	bpr	81	char *cstr;
		82	switch(code) {
		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;
		89	case 550: cstr="WIMS Module Error"; break;
		90	default: cstr="ERROR"; break;
		91	}
		92	if(httpd_type!=httpd_wims) printf("Status: %d %s\r\n",code,cstr);
		93	else {
		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);
12242	bpr	102	}
10	reyssat	103	}
		104
		105	void flushoutput(void)
		106	{
12242	bpr	107	int l2;
		108	if(outptr<=outbuf) return;
		109	l2=outptr-outbuf;
		110	if(lastout_file!=-1) (void)write(lastout_file,outbuf,l2);
		111	else fwrite(outbuf,l2,1,stdout);
		112	outptr=outbuf;
10	reyssat	113	}
		114
		115	void internal_warn(char msg[])
		116	{
12242	bpr	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);
10	reyssat	121	}
		122
8343	bpr	123	/* Internal error: panic and forget about requester. */
10	reyssat	124	void internal_error(char msg[])
		125	{
12242	bpr	126	if(error_status<2) {
		127	nph_header(500);
13359	obado	128	printf("Cache-Control: no-cache, no-store, must-revalidate\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);
12242	bpr	132	}
		133	delete_pid(); exit(1);
10	reyssat	134	}
		135
		136	void tex_nospace(char *p)
		137	{
12242	bpr	138	char p1, p2;
		139	char buf[MAX_LINELEN+1];
		140	for(p1=buf,p2=p;*p2 && p1-buf<MAX_LINELEN-4;p2++) {
		141	if(!isspace(p2)) {p1++=*p2;continue;}
		142	while(isspace(*p2)) p2++;
		143	if(*(p1-1)=='\\' \|\|
		144	(p1>buf && myisalnum((p1-1)) && myisalnum(p2)))
		145	*p1++=' ';
		146	p1++=p2;
		147	}
		148	*p1++=0; memmove(p,buf,p1-buf);
10	reyssat	149	}
		150
		151	void nametoolong(char *p)
		152	{
12242	bpr	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");
10	reyssat	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	{
12242	bpr	164	if(strcmp(fname,lastftest)==0) return lastftype;
10	reyssat	165	/* if(fname[0]=='/' \|\| fname[0]=='.') fprintf(stderr,"ftest: %s\n",fname); */
12242	bpr	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)) {
		170	if((ftst.st_mode&(S_IXUSR\|S_IXGRP\|S_IXOTH))!=0) return lastftype=is_exec;
		171	else return lastftype=is_file;
		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;
10	reyssat	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	{
12242	bpr	184	va_list vp;
		185	char *p;
10	reyssat	186
12242	bpr	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;
10	reyssat	193	}
		194
		195	void sysmask_trigger(char *s)
		196	{
12242	bpr	197	char buf[MAX_FNAME+1];
		198	struct stat st;
		199	mkfname(buf,"%s/%s",sysmask_trigger_dir,s);
		200	stat(buf,&st);
10	reyssat	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	{
12242	bpr	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) {
		212	if(st==is_exec) { /* refuse to open executable file */
		213	setvar("executable",fname); module_error("executable");
10	reyssat	214	}
12242	bpr	215	return NULL;
		216	}
		217	l=ftst.st_size; if(l<0) return NULL;
		218	if(l>=buflen) {
		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");
5505	bpr	223	}
12242	bpr	224	else user_error("cmd_output_too_long");
10	reyssat	225	}
12242	bpr	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);
		230	if(lc<0 \|\| lc>l \|\| (lc!=l && t==0)){
		231	if(buf==NULL) free(bf); else buf[0]=0; return NULL;
		232	}
		233	bf[lc]=0; _tolinux(bf); return bf;
10	reyssat	234	}
		235
8343	bpr	236	/* Get a line in a stored working file.
5505	bpr	237	* Buffer length is always MAX_LINELEN. */
10	reyssat	238	int wgetline(char buf[], size_t buflen, WORKING_FILE *f)
		239	{
12242	bpr	240	int i,j; unsigned int n;
		241	i=f->linepointer; buf[0]=0;
		242	if(i>=f->linecnt \|\| f->textbuf==NULL) return EOF;
		243	n=f->lines[i].llen;
		244	if(n>=buflen) n=buflen-1;
		245	if(n>0) memmove(buf,f->lines[i].address,n);
		246	buf[n]=0;
		247	for(j=i+1;j<f->linecnt && f->lines[j].isstart==0;j++);
		248	f->l=i; f->linepointer=j;
		249	if(j>=f->linecnt && n==0) return EOF; else return n;
10	reyssat	250	}
		251
		252	int get_cached_file(char *name)
		253	{
12242	bpr	254	int i,l,flag;
		255	l=strlen(name); if(l>=127) return -1;
		256	if(strncmp(module_prefix,module_dir,strlen(module_dir))!=0) flag=8; else flag=0;
		257	for(i=0;i<mcachecnt;i++) {
		258	if(flag==mcache[i].nocache && strcmp(name,mcache[i].name)==0) {
		259	memmove(&m_file,mcache+i,sizeof(WORKING_FILE));
		260	m_file.nocache\|=4;
		261	return i;
10	reyssat	262	}
12242	bpr	263	}
		264	return -1;
10	reyssat	265	}
		266
8343	bpr	267	/* Open a work file. Returns 0 if OK. */
10	reyssat	268	int open_working_file(WORKING_FILE f, char fname)
		269	{
12242	bpr	270	char p, q;
		271	void *vp;
		272	int i,j,k,laststart,lc[LINE_LIMIT];
10	reyssat	273
12242	bpr	274	f->linecnt=f->linepointer=0;
		275	f->for_idx=f->nocache=0;
		276	f->l=-1; f->lines=NULL;
		277	strncpy(f->filepath,fname,MAX_FNAME+1);
		278	f->textbuf=readfile(fname,NULL,WORKFILE_LIMIT);
		279	if(f->textbuf==NULL) return -1;
		280	p=f->textbuf; if(*p) {
		281	for(i=0,p--; i<LINE_LIMIT-1 && p!=NULL;p=strchr(p,'\n')) {
		282	if(i>0) *p=0;
		283	lc[i++]=(++p-f->textbuf);
10	reyssat	284	}
12242	bpr	285	}
		286	else i=0;
		287	if(i>=LINE_LIMIT-1) module_error("file_too_long");
		288	lc[i]=lc[i-1]+strlen(f->textbuf+lc[i-1])+1;
		289	f->textbuf[lc[i]]=0;
		290	f->linecnt=i; laststart=0;
		291	f->for_stack=xmalloc(MAX_FOR_LEVELsizeof(FOR_STACK)+(i+1)sizeof(LINE_STRUCT));
		292	vp=f->for_stack+MAX_FOR_LEVEL; f->lines=vp;
		293	for(j=0;j<i;j++) {
		294	f->lines[j].address=p=(f->textbuf)+lc[j];
		295	f->lines[j].llen=lc[j+1]-lc[j]-1;
		296	(f->lines[j]).execcode=(f->lines[j]).varcode=-1;
		297	if(j==0) goto normal;
		298	q=f->lines[laststart].address+f->lines[laststart].llen-1;
		299	if(q>=f->textbuf && *q=='\\') {
		300	f->lines[laststart].llen+=f->lines[j].llen; *q='\n';
		301	f->lines[j].isstart=f->lines[j].llen=0;
		302	memmove(q+1,p,lc[j+1]-lc[j]);
		303	}
		304	else {
		305	normal: for(q=p;myislspace(*q);q++);
		306	f->lines[j].isstart=1; laststart=j; k=0;
		307	switch(*q) {
		308	/* isstart: bit 1 = start.
		309	* bit 2 = exec
		310	* bit 3 (4) = label
		311	* bit 4 (8) = hard comment (!!)
		312	* bit 5 (16) = soft comment (#) */
		313	case exec_prefix_char: {
		314	if(myisalpha(q[1])) f->lines[j].isstart=3;
		315	else f->lines[j].isstart=9;
		316	k=1; break;
		317	}
		318	case label_prefix_char: {f->lines[j].isstart=5; k=1; break;}
		319	case comment_prefix_char: {f->lines[j].isstart=17; break;}
		320	default: {f->lines[j].isstart=1; break;}
5505	bpr	321	}
12242	bpr	322	if(k && q>p) {f->lines[j].address=q;f->lines[j].llen-=q-p;}
10	reyssat	323	}
12242	bpr	324	}
		325	f->lines[i].isstart=1; f->lines[i].llen=0;
		326	f->lines[i].address=(f->textbuf)+lc[i];
		327	mfilecnt++; return 0;
10	reyssat	328	}
		329
8343	bpr	330	/* close an earlier opened working file */
10	reyssat	331	void close_working_file(WORKING_FILE *f, int cache)
		332	{
12242	bpr	333	f->linepointer=f->l=0;
		334	if(cache && untrust==0 && mcachecnt<MAX_MCACHE && (f->nocache&7)==0) {
		335	memmove(mcache+mcachecnt,f,sizeof(WORKING_FILE));
		336	mcachecnt++;
		337	}
		338	else if((f->nocache&4)==0) {
		339	if(f->for_stack!=NULL) free(f->for_stack);
		340	if(f->textbuf!=NULL) free(f->textbuf);
		341	}
		342	f->for_stack=NULL; f->textbuf=NULL; f->linecnt=0;
10	reyssat	343	}
		344
		345	void free_mcache(void)
		346	{
12242	bpr	347	int i;
		348	untrust=0;
		349	for(i=mcachecnt-1;i>=0;i--) close_working_file(mcache+i,0);
		350	mcachecnt=0;
10	reyssat	351	}
		352
		353	void cleantmpdir(void);
		354	void user_error_log(char msg[]);
		355
		356	void nested_error(char msg[])
		357	{
12242	bpr	358	fprintf(stderr,"\nNested error! %s\n",msg);
		359	nph_header(420);
		360	printf("\r\n\r\nWIMS error processing aborted on nested error.\r\n\r\n%s\r\n",msg);
		361	delete_pid(); exit(1);
10	reyssat	362	}
		363
8343	bpr	364	/* Send an error message to requester and exit.
		365	* This is for user errors, language-sensitive.
		366	*/
10	reyssat	367	void user_error(char msg[])
		368	{
12242	bpr	369	char erfname[MAX_FNAME+1];
10	reyssat	370
12242	bpr	371	if(error_status) nested_error(msg);
		372	error_status=1;
		373	mkfname(erfname,"%s.%s",user_error_msg_file,lang);
		374	if(ftest(erfname)!=is_file) internal_error("user_error(): error message file not found.\n\
10	reyssat	375	Bad installation.");
12242	bpr	376	force_setvar("wims_user_error",msg);
		377	if(strcmp(msg,"threshold")!=0) user_error_log(msg);
		378	memmove(module_prefix,".",2);
		379	if(lastout_file!=-1 && outputing) {
		380	flushoutput(); close(lastout_file); lastout_file=-1;
		381	}
		382	nph_header(450);
		383	phtml_put_base(erfname,0);
		384	if(strcmp(msg,"double_click")!=0) delete_pid();
		385	else {
		386	cleantmpdir(); flushlog();
		387	}
		388	flushoutput(); exit(0);
10	reyssat	389	}
		390
		391	void module_error_log(char msg[]);
		392
8343	bpr	393	/* Messages for module errors. English only.
		394	* This is really rudimentary for the time being.
		395	*/
10	reyssat	396	void module_error(char msg[])
		397	{
12242	bpr	398	int send=0;
		399	char *p;
		400	WORKING_FILE mf;
10	reyssat	401
12242	bpr	402	if(error_status) nested_error(msg);
		403	error_status=1; untrust=0;
		404	module_error_log(msg);
		405	nph_header(550);
		406	printf("Server: %s %s (%s)\r\n", SHORTSWNAME,wims_version,LONGSWNAME);
		407	p=getvar("wims_main_font");
		408	if(p!=NULL && *p!=0) printf("Content-type: text/plain; charset=%s\r\n\r\n",p);
		409	else printf("Content-type: text/plain\r\n\r\n");
		410	p=getvar(ro_name[ro_module]); if(p==NULL) p="???";
		411	printf("ERROR.\n\nwims has detected an error in the module '%s'.",p);
		412	if(m_file.l>=0) printf("\n\nIn file '%s', line %d:", m_file.name,m_file.l+1);
		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) {
		417	if(tmplbuf[0]!=tag_prefix_char) {
		418	if(send) {substit(tmplbuf); puts(tmplbuf);}
		419	continue;
10	reyssat	420	}
12242	bpr	421	strip_trailing_spaces(tmplbuf);
		422	if(tmplbuf[1]==0 \|\| strcmp(msg,tmplbuf+1)==0) send=1;
		423	else send=0;
		424	}
		425	close_working_file(&mf,0);
		426	outptr=outbuf; delete_pid(); exit(1);
10	reyssat	427	}
		428
5505	bpr	429	/* Output kernel routine */
10	reyssat	430	void _output_(char *s)
		431	{
12242	bpr	432	int l,l2;
		433	l=strlen(s); output_length+=l;
		434	if(output_length>=OUTPUT_LENGTH_LIMIT) {
		435	module_error("output_too_long"); return;
		436	}
		437	l2=sizeof(outbuf)-(outptr-outbuf);
		438	put: if(l<=l2) {
		439	memmove(outptr,s,l); outptr+=l; return;
		440	}
		441	memmove(outptr,s,l2); s+=l2; l-=l2;
		442	if(lastout_file!=-1) (void)write(lastout_file,outbuf,sizeof(outbuf));
		443	else fwrite(outbuf,sizeof(outbuf),1,stdout);
		444	outptr=outbuf; l2=sizeof(outbuf); goto put;
10	reyssat	445	}
		446
5505	bpr	447	/* Output with no var. */
10	reyssat	448	void output0(char buf[])
		449	{
12242	bpr	450	char p1, p2, *ps;
		451	int dynsave;
		452	if(backslash_insmath) {
		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);
10	reyssat	460	}
12242	bpr	461	if(*ps) _output_(ps);
		462	instex_usedynamic=dynsave;
		463	}
		464	else _output_(buf);
10	reyssat	465	}
		466
5505	bpr	467	/* Output routine */
10	reyssat	468	void output(char *s,...)
		469	{
12242	bpr	470	va_list vp;
		471	char buf[4*MAX_LINELEN+1];
10	reyssat	472
12242	bpr	473	va_start(vp,s);
		474	vsnprintf(buf,sizeof(buf),s,vp);
		475	va_end(vp);
		476	output0(buf);
10	reyssat	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	{
12242	bpr	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) {
		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,"$$");
10	reyssat	493	}
12242	bpr	494	}
		495	else {
		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);
		505	}
10	reyssat	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	{
12242	bpr	513	char modname, w, buf[MAX_LINELEN+1];
		514	int i,n;
		515	static int _trusted=-1; /* avoid repeated computations */
7646	bpr	516
12242	bpr	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;
		521	if(memcmp(modname,"adm/",strlen("adm/"))==0 \|\|
		522	memcmp(modname,"classes/",strlen("classes/"))==0 \|\|
		523	strcmp(modname,home_module)==0 \|\|
		524	memcmp(modname,"help/",strlen("help/"))==0) {
		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;
		530	}
		531	n=wordnum(trusted_modules);
		532	for(i=0;i<n;i++) {
		533	w=fnd_word(trusted_modules,i+1,buf);
		534	if(strcmp(w,modname)==0) goto tr;
		535	}
		536	return _trusted=0;
10	reyssat	537	}
		538
8343	bpr	539	/* file should be in the module directory, but
		540	* it may also be somewhere else.
		541	* buf[] requires MAX_FNAME+1 length.
		542	* Returns 0 if found.
		543	*/
10	reyssat	544	int find_module_file(char *fname, char buf[], int mode)
		545	{
12242	bpr	546	char *p, dtest[32];
7646	bpr	547
12242	bpr	548	fname=find_word_start(fname);
		549	if(*fname==0) return -1;
8343	bpr	550	/* Name checking: no directory backtracing. */
12242	bpr	551	if(strstr(fname,parent_dir_string)!=NULL) {
		552	setvar(error_data_string,fname); module_error("illegal_fname");
		553	return -1;
		554	}
		555	p=strchr(fname,'/'); if(p==NULL \|\| p>fname+10) goto openit;
		556	memmove(dtest,fname,p-fname); dtest[p-fname]=0;
		557	if(strcmp(dtest,"datamodule")==0) {
		558	mkfname(buf,"modules/data%s",p); goto lastopen;
		559	}
		560	if(strcmp(dtest,"wimshome")==0 && trusted_module()) {
		561	mkfname(buf,"%s%s",getvar("wims_home"),p); goto lastopen;
		562	}
		563	if(strcmp(dtest,"writable")==0) {
		564	if(strncmp(p+1,"TEMP_",5)==0 && strchr(p+1,'/')==NULL) {
		565	mkfname(buf,"%s/%s",tmp_dir,p+1);
10	reyssat	566	}
12242	bpr	567	else {
		568	mkfname(buf,"w/%s/%s",module_prefix,p+1);
10	reyssat	569	}
12242	bpr	570	untrust\|=4;
		571	}
		572	else {
		573	openit: mkfname(buf,"%s/%s",module_prefix,fname);
		574	}
		575	if(mode) return 0;
		576	if(ftest(buf)!=is_file) {
		577	if(lastftype==is_exec) {
		578	isexec:
		579	setvar("executable",fname); module_error("executable");
		580	return -1;
10	reyssat	581	}
12242	bpr	582	if(strncmp(fname,"adm/",4)==0 &&
		583	(!trusted_module() \|\| is_class_module)) return -1;
		584	mkfname(buf,"scripts/%s",fname);
		585	lastopen:
10	reyssat	586	if(mode) return 0;
		587	if(ftest(buf)!=is_file) {
12242	bpr	588	if(lastftype==is_exec) goto isexec;
		589	else return -1;
10	reyssat	590	}
12242	bpr	591	}
		592	return 0;
10	reyssat	593	}
		594
8343	bpr	595	/* check whether a file is user-submitted
		596	* This is deprecated because of the wimshome/ method.
		597	*/
10	reyssat	598	/* int user_file(char *name) {
		599	if(name[0]=='/' \|\| name[0]=='.' \|\|
7646	bpr	600	strstr(name,"classes/")!=NULL \|\|
10	reyssat	601	strstr(name,"forums/")!=NULL \|\|
		602	strstr(name,"sessions/")!=NULL \|\|
		603	strstr(name,"doc/")!=NULL) return 1; else return 0;
8343	bpr	604	}
		605	*/
10	reyssat	606
8343	bpr	607	/* returns 1 if violation */
10	reyssat	608	int datafile_check(char *name) {
12242	bpr	609	if((untrust&255)==0) return 0;
		610	if(strncmp(name,"data/",strlen("data/"))==0) return 0;
		611	if(strncmp(name,"authors/",strlen("authors/"))==0) return 0;
		612	if(strncmp(name,"datamodule/",strlen("datamodule/"))==0) return 0;
		613	return 1;
10	reyssat	614	}
		615
8343	bpr	616	/* returns 0 if success */
10	reyssat	617	void readdatafile(char *name)
		618	{
12242	bpr	619	char *pp;
		620	if(strcmp(name,lastdatafile)==0) return;
		621	lastdata[0]=0; readfile(name,lastdata,WORKFILE_LIMIT);
		622	mystrncpy(lastdatafile,name,sizeof(lastdatafile));
		623	datacache[0]=lastdata; nextdatacache=1;
		624	if(lastdata[0]==tag_string[1]) {
		625	datacache[1]=lastdata; nextdatacache++;
		626	}
		627	pp=strstr(lastdata,tag_string);
		628	if(pp) datacache[nextdatacache]=pp;
		629	else datacache[nextdatacache]=lastdata+strlen(lastdata);
10	reyssat	630	}
		631
		632	char _nextdata(char p)
		633	{
12242	bpr	634	char *pp;
		635	if(!*p) return p;
		636	pp=strstr(p,tag_string);
		637	if(pp) return pp;
		638	else return p+strlen(p);
10	reyssat	639	}
		640
8343	bpr	641	/* datafile structure: number of records.
		642	* tag=1 if direct access
		643	*/
10	reyssat	644	unsigned int datafile_recordnum(char *p)
		645	{
12242	bpr	646	char nbuf[MAX_LINELEN+1], *pp;
		647	int i, t, ret;
10	reyssat	648
12242	bpr	649	t=untrust; ret=0;
		650	if(direct_datafile) mystrncpy(nbuf,p,sizeof(nbuf));
		651	else if(datafile_check(p)!=0 \|\| find_module_file(p,nbuf,0)) goto ret;
		652	readdatafile(nbuf);
		653	for(i=nextdatacache, pp=datacache[i]; *pp;) {
		654	pp=_nextdata(pp+1); i++;
		655	if(i<DATAFIELD_LIMIT) {
		656	datacache[i]=pp; nextdatacache=i;
10	reyssat	657	}
12242	bpr	658	}
		659	ret=i-1;
		660	ret:
		661	untrust=t;
		662	return ret;
10	reyssat	663	}
		664
8343	bpr	665	/* datafile structure: find record n, starting from 1 */
10	reyssat	666	char datafile_fnd_record(char p, int n, char bf[])
		667	{
12242	bpr	668	char nbuf[MAX_LINELEN+1], pp, p2;
		669	int i, t;
10	reyssat	670
12242	bpr	671	bf[0]=0; t=untrust;
		672	if(n<0) goto ret;
		673	if(direct_datafile) mystrncpy(nbuf,p,sizeof(nbuf));
		674	else if(datafile_check(p)!=0 \|\| find_module_file(p,nbuf,0)) goto ret;
		675	readdatafile(nbuf); if(*lastdata==0) goto ret;
		676	if(n>nextdatacache) {
		677	for(i=nextdatacache, pp=datacache[i]; i<n && *pp;) {
		678	pp=_nextdata(pp+1); i++;
		679	if(i<DATAFIELD_LIMIT) {
		680	datacache[i]=pp; nextdatacache=i;
5505	bpr	681	}
10	reyssat	682	}
12242	bpr	683	}
		684	else pp=datacache[n];
		685	if(!*pp) goto ret;
		686	if(n>1 \|\| (n==1 && *pp!=tag_string[1])) pp+=strlen(tag_string);
		687	else if(n==1) pp+=strlen(tag_string)-1;
		688	if(n<nextdatacache) p2=datacache[n+1];
		689	else {
		690	p2=strstr(pp,tag_string); if(p2==NULL) p2=pp+strlen(pp);
		691	if(n<DATAFIELD_LIMIT-1 && n==nextdatacache) {
5505	bpr	692	nextdatacache++; datacache[nextdatacache]=p2;
10	reyssat	693	}
12242	bpr	694	}
		695	if(p2-pp>=MAX_LINELEN) p2=pp+MAX_LINELEN-1;
		696	if(p2<pp) p2=pp;
		697	memmove(bf,pp,p2-pp); bf[p2-pp]=0;
		698	ret:
		699	untrust=t; return bf;
10	reyssat	700	}
		701
		702	char hex2char(char c1, char c2)
		703	{
12242	bpr	704	char tbuf[16];
		705	if(c1<'0' \|\| c1>'f' \|\| c2<'0' \|\| c2>'f') {
10	reyssat	706	invl:
12242	bpr	707	snprintf(tbuf,sizeof(tbuf),"%%%c%c",c1,c2);
		708	setvar(error_data_string,tbuf);
		709	user_error("invalid_char_in_query_string");
		710	}
		711	c1=toupper(c1);c2=toupper(c2);
		712	if(c1>'9' && c1<'A') goto invl;
		713	if(c2>'9' && c2<'A') goto invl;
		714	if(c1>'F' \|\| c2>'F') goto invl;
		715	if(c1>='A') c1=c1-'A'+'9'+1;
		716	if(c2>='A') c2=c2-'A'+'9'+1;
		717	return (c1-'0')*16+c2-'0';
10	reyssat	718	}
		719
8343	bpr	720	/* Converts back http escaped chars, slight. Does not check buffer length.
		721	* Returns converted string length.
		722	*/
10	reyssat	723	int _http2env(char outs[], char ins[])
		724	{
12242	bpr	725	int j,k,l;
		726	l=strlen(ins);
		727	for(j=k=0;j<l && !isspace(ins[j]);j++,k++) {
		728	if(isspace(ins[j])) { /* skip space characters in query string */
		729	k--;continue;
		730	}
		731	if(ins[j]=='%') {
8343	bpr	732	/* skip Carriage-Return. */
12242	bpr	733	if(ins[j+1]=='0' && (ins[j+2]=='d' \|\| ins[j+2]=='D')) {
		734	j+=2; k--; continue;
		735	}
		736	outs[k]=hex2char(ins[j+1],ins[j+2]);
		737	j+=2; continue;
10	reyssat	738	}
12242	bpr	739	outs[k]=ins[j];
		740	}
		741	outs[k]=0;
		742	return k;
10	reyssat	743	}
		744
8343	bpr	745	/* Converts back http escaped chars. Does not check buffer length.
		746	* Returns converted string length.
		747	*/
10	reyssat	748	int http2env(char outs[], char ins[])
		749	{
12242	bpr	750	int j,k,l;
		751	l=strlen(ins);
		752	for(j=k=0;j<l && !isspace(ins[j]);j++,k++) {
		753	if(isspace(ins[j])) { /* skip space characters in query string */
		754	k--;continue;
		755	}
		756	if(ins[j]=='%') {
8343	bpr	757	/* skip Carriage-Return. */
12242	bpr	758	if(ins[j+1]=='0' && (ins[j+2]=='d' \|\| ins[j+2]=='D')) {
		759	j+=2; k--; continue;
5505	bpr	760	}
12242	bpr	761	outs[k]=hex2char(ins[j+1],ins[j+2]);
		762	j+=2; continue;
10	reyssat	763	}
12242	bpr	764	if(ins[j]=='+') {
		765	outs[k]=' '; continue;
		766	}
		767	if(ins[j]=='?' \|\| ins[j]=='&') {
		768	outs[k]=0; continue;
		769	}
		770	outs[k]=ins[j];
		771	}
		772	outs[k]=0;
		773	return k;
10	reyssat	774	}
		775
8343	bpr	776	/* translate a string to http querystring style.
		777	* '&' is not translated.
		778	* Buffer p must be at least MAX_LINELEN.
		779	*/
10	reyssat	780	void tohttpquery(char *p)
		781	{
12242	bpr	782	char trlist[]=" ()[]{}+-*^\|/\"\'!:;,<>\n";
		783	char *pp;
		784	for(pp=p;*pp;pp++) {
		785	if(*pp==' ') {
		786	*pp='+'; continue;
10	reyssat	787	}
12242	bpr	788	if(strchr(trlist,*pp)==NULL) continue;
		789	if(pp=='+' && pp>p && (pp-1)=='&') continue;
		790	if(pp>p && *(pp-1)=='\\') {
		791	ovlstrcpy(pp-1,pp);pp--;continue;
		792	}
		793	if(*pp=='\n') {
		794	string_modify(p,pp,pp+1,"%%0D%%0A");pp+=5;
		795	}
		796	else {
		797	string_modify(p,pp,pp+1,"%%%02X",*pp);pp+=2;
		798	}
		799	}
10	reyssat	800	}
		801
8343	bpr	802	/* substitute backslash parameters. Internal use only. */
10	reyssat	803	void slashsubst(char *p)
		804	{
12242	bpr	805	char p1, p2, pt, pp, namebuf[128];
		806	int n;
10	reyssat	807
12242	bpr	808	n=strlen(mathfont_prefix); memmove(namebuf,mathfont_prefix,n+1);
		809	for(p1=strchr(p,'\\'); p1!=NULL; p1=strchr(p1,'\\')) {
		810	p1++; for(p2=p1; myisalnum(p2) \|\| p2=='_'; p2++);
		811	if(p2<=p1 \|\| p2>p1+100) continue;
		812	memmove(namebuf+n,p1,p2-p1); namebuf[p2-p1+n]=0;
		813	pt=_getvar(namebuf); if(pt==NULL) continue;
		814	if(*p2=='[' && (pp=find_matching(p2+1,']'))!=NULL) {
		815	string_modify(p,pp+1,pp+1,")");
		816	string_modify(p,p1-1,p1,"$(%s",mathfont_prefix);
10	reyssat	817	}
12242	bpr	818	else string_modify(p,p1-1,p1,"$%s",mathfont_prefix);
		819	}
10	reyssat	820	}
		821
8343	bpr	822	/* two alarm handlers. */
10	reyssat	823	void alarm1(int s)
		824	{
12242	bpr	825	if(killpid>0 && kill(killpid,SIGKILL)) module_error("timeup");
		826	killpid=0;
10	reyssat	827	}
		828
		829	void alarm2(int s)
		830	{
12242	bpr	831	cleantmpdir();
		832	alarm1(s); module_error("timeup");
10	reyssat	833	}
		834
		835	void finalalarm(void)
		836	{
12242	bpr	837	time_t curr;
		838	curr=time(0);
		839	if(curr>=limtime) alarm2(SIGALRM);
		840	errno=0;
		841	if(signal(SIGALRM,alarm2)==SIG_ERR)
		842	internal_error(strerror(errno));
		843	alarm(limtime-curr+1);
10	reyssat	844	}
		845
		846	void initalarm(void)
		847	{
12242	bpr	848	limtimex=nowtime+4*rlimit_cpu/3;
		849	limtime=limtimex+2; finalalarm();
10	reyssat	850	}
		851
		852	void forkalarm(void)
		853	{
12242	bpr	854	time_t curr;
		855	curr=time(0);
		856	if(curr>=limtimex) {alarm1(SIGALRM); return;}
		857	if(signal(SIGALRM,alarm1)==SIG_ERR)
		858	internal_error(strerror(errno));
		859	alarm(limtimex-curr+1);
10	reyssat	860	}
		861
8343	bpr	862	/* create pid tag */
10	reyssat	863	void create_pid(void)
		864	{
12242	bpr	865	char buf[MAX_FNAME+1], pbuf[256], obuf[MAX_FNAME+1];
		866	struct stat dst;
		867	struct utimbuf ub;
7646	bpr	868
12242	bpr	869	if(robot_access \|\| *session_prefix==0) return;
		870	if(cmd_type==cmd_getframe) return;
		871	mkfname(buf,"%s/.pid",s2_prefix);
8343	bpr	872	/* another process running? */
12242	bpr	873	if(readfile(buf,pbuf,sizeof(pbuf))!=NULL) {
		874	mkfname(obuf,"/proc/%s",pbuf);
		875	if(stat(obuf,&dst)==0) user_error("double_click");
		876	}
		877	snprintf(pidbuf,sizeof(pidbuf),"%u",getpid());
		878	accessfile(pidbuf,"w","%s",buf);
8343	bpr	879	/* Touch session time */
12242	bpr	880	if(strstr(session_prefix,"sessions/")==NULL) return;
		881	ub.actime=ub.modtime=nowtime;
		882	utime(session_prefix,&ub);
		883	if(strchr(session_prefix,'_')!=NULL) { /* touch parent too */
		884	char sbuf[MAX_FNAME+1], *p;
		885	mystrncpy(sbuf,session_prefix,sizeof(sbuf));
		886	p=strchr(sbuf,'_'); if(p!=NULL) *p=0;
		887	utime(sbuf,&ub);
		888	}
10	reyssat	889	}
		890
8185	bpr	891	struct mxtab mxtab[MAX_MULTIEXEC];
10	reyssat	892	int mxno=0;
		893
		894	int execredirected(char cmdf, char inf, char outf, char errf, char *arg[])
		895	{
12242	bpr	896	pid_t pid;
		897	int status, t;
10	reyssat	898
12242	bpr	899	if(robot_access) return 0;
		900	if(time(0)>=limtimex) {
		901	if(errf!=NULL)
		902	accessfile("No time left to execute subprograms.\n","w","%s",errf);
		903	return -100;
		904	}
		905	lastdatafile[0]=lastftest[0]=0;
		906	fflush(NULL); /* flush all output streams before forking
		907	* otherwise they will be doubled
		908	*/
		909	pid=fork(); if(pid==-1) return -1;
		910	if(!pid) { /* child */
		911	char buf[MAX_LINELEN+1]; int k;
		912	(void)nice(10); /* lower priority for children */
		913	if(is_multiexec) {
		914	dup2(mxtab[multiexec_index].pipe_stdin[0],0);
		915	dup2(mxtab[multiexec_index].pipe_stdout[1],1);
		916	dup2(mxtab[multiexec_index].pipe_stderr[1],2);
10	reyssat	917	}
12242	bpr	918	else {
		919	if(inf!=NULL) (void)freopen(inf,"r",stdin);
		920	if(outf!=NULL) (void)freopen(outf,"w",stdout);
		921	if(errf!=NULL) (void)freopen(errf,"w",stderr);
		922	}
8343	bpr	923	/* This is to patch LinuxPPC uid wrapping
		924	* for scripts */
12242	bpr	925	t=0; if(strchr(cmdf,'/')) {
		926	int tf;
		927	char tbuf[16];
		928	tf=open(cmdf,O_RDONLY); (void)read(tf,tbuf,8); close(tf);
		929	if(memcmp(tbuf+1,"ELF",3)!=0) t=1;
		930	}
		931	if(wrapexec==-1) {
		932	setreuid(getuid(),getuid());setregid(getgid(),getgid());
		933	}
		934	if(wrapexec==1 \|\| (t==1 && wrapexec==0)) {
		935	setreuid(geteuid(),geteuid());setregid(getegid(),getegid());
		936	}
		937	errno=0;
		938	if(strchr(cmdf,'/')) execve(cmdf,arg,environ);
		939	else execvp(cmdf,arg);
		940	snprintf(buf,sizeof(buf),"Failed to execute");
		941	for(k=0;arg[k];k++) {
5505	bpr	942	t=strlen(buf);
12242	bpr	943	snprintf(buf+t,sizeof(buf)-t," %s",arg[k]);
10	reyssat	944	}
12242	bpr	945	t=strlen(buf);
		946	snprintf(buf+t,sizeof(buf)-t,"\n %s\n",strerror(errno));
		947	accessfile(buf,"a","%s/exec.fail",tmp_dir);
		948	exit(127);
		949	}
		950	else { /* parent */
		951	wrapexec=0; status=0;
		952	if(exec_wait && !is_multiexec) {
		953	killpid=pid; forkalarm();
		954	waitpid(pid,&status,0); killpid=0; finalalarm();
10	reyssat	955	}
12242	bpr	956	return WEXITSTATUS(status);
		957	}
10	reyssat	958	}
		959
8343	bpr	960	/* preparation for resident execution.
		961	* Returns 1 if already up, otherwise 0.
		962	*/
10	reyssat	963	int multiexec(char cmd, char *abuf)
		964	{
12242	bpr	965	char *p;
		966	int i;
7646	bpr	967
12242	bpr	968	if(robot_access) return 0;
		969	if(strstr(tmp_dir,"sessions/")==NULL) return 0;
		970	if(strstr(tmp_debug,"yes")!=NULL && checkhost(manager_site)>=1)
		971	setenv("multiexec_debug","yes",1);
		972	p=getvar("wims_multiexec");
		973	if(p==NULL \|\| wordchr(p,cmd)==NULL) return 0; /* not allowed */
		974	if(!multiexec_random[0]) {
		975	snprintf(multiexec_random, sizeof(multiexec_random),
		976	"%lX%lX%lX%lX%lX%lX%lX%lX",
		977	random(),random(),random(),random(),
		978	random(),random(),random(),random());
		979	setenv("multiexec_random",multiexec_random,1);
		980	}
		981	for(i=0;i<mxno && strcmp(cmd,mxtab[i].cmd)!=0; i++);
		982	multiexec_index=i;
		983	if(i==mxno) {
		984	if(mxno>=MAX_MULTIEXEC) return 0;
		985	if(pipe(mxtab[i].pipe_stdin)<0) return 0;
		986	if(pipe(mxtab[i].pipe_stdout)<0) return 0;
		987	if(pipe(mxtab[i].pipe_stderr)<0) return 0;
		988	mystrncpy(mxtab[i].cmd,cmd,sizeof(mxtab[i].cmd));
		989	mxno++; is_multiexec=1;
		990	exportall(); setenv("wims_exec_parm",multiexec_random,1);
		991	execredirected(abuf[0],NULL,NULL,NULL,abuf);
		992	}
		993	is_multiexec=0;
		994	return 1;
10	reyssat	995	}
		996
8343	bpr	997	/* my system(), but with variable parms
		998	* More secure than system(), and direct fork.
		999	*/
10	reyssat	1000	int call_ssh(char *s,...)
		1001	{
12242	bpr	1002	va_list vp;
		1003	char buf[MAX_LINELEN+1];
		1004	char *arg[1024];
		1005	char inf=NULL, outf=NULL, *errf=NULL;
		1006	char cmdf, p, *p2;
		1007	int i, d;
10	reyssat	1008
12242	bpr	1009	if(robot_access) return 0;
		1010	va_start(vp,s);
		1011	vsnprintf(buf,sizeof(buf),s,vp);
		1012	va_end(vp);
		1013	p=find_word_start(buf); if(*p==0) return 0;
		1014	cmdf=p;
		1015	for(i=0;*p!=0 && i<1000; p=find_word_start(p2)) {
		1016	switch(*p) {
		1017	case '\'': {
		1018	p++; p2=strchr(p,'\''); if(p2==NULL) p2=p+strlen(p);
		1019	d=0; break;
5505	bpr	1020	}
12242	bpr	1021	case '"': {
		1022	p++; p2=strchr(p,'"'); if(p2==NULL) p2=p+strlen(p);
		1023	d=0; break;
5505	bpr	1024	}
12242	bpr	1025	default: d=1; p2=find_word_end(p); break;
10	reyssat	1026	}
12242	bpr	1027	if(p2) p2++=0;
		1028	if(!d) {arg[i++]=p; continue;}
		1029	switch(*p) {
		1030	case '<': inf=++p; break;
		1031	case '>': {
		1032	p++;
		1033	if(*p=='&') {
		1034	merge: p++; errf=outf=p; break;
		1035	}
		1036	else outf=p;
		1037	break;
		1038	}
		1039	case '&': {
		1040	p++;
		1041	if(*p=='>') goto merge;
		1042	else break;
		1043	}
		1044	case '2': {
		1045	if(*(p+1)=='>') {errf=p+2; break;}
		1046	}
		1047	default: arg[i++]=p; break;
		1048	}
		1049	}
		1050	arg[i]=NULL;
		1051	return execredirected(cmdf,inf,outf,errf,arg);
10	reyssat	1052	}
		1053
8343	bpr	1054	/* Read/write to a file with variable parms to print filename */
10	reyssat	1055	void accessfile(char content, char type, char *s,...)
		1056	{
12242	bpr	1057	va_list vp;
		1058	char buf[MAX_FNAME+1];
		1059	int fd;
10	reyssat	1060
12242	bpr	1061	if(robot_access) return;
		1062	va_start(vp,s);
		1063	vsnprintf(buf,sizeof(buf),s,vp);
		1064	va_end(vp);
		1065	if(strlen(buf)>=MAX_FNAME-1) nametoolong(buf);
		1066	switch(*type) {
		1067	case 'r': readfile(buf,content,MAX_LINELEN); return;
		1068	case 'e': readfile(buf,content,MAX_LINELEN/4); return; /* limited read */
		1069	case 'w': fd=creat(buf,S_IRUSR\|S_IWUSR\|S_IRGRP\|S_IROTH); break;
		1070	case 'a': fd=open(buf,O_WRONLY\|O_CREAT\|O_APPEND,S_IRUSR\|S_IWUSR\|S_IRGRP\|S_IROTH); break;
		1071	default : return;
		1072	}
		1073	lastdatafile[0]=lastftest[0]=0;
		1074	if(fd==-1) return;
		1075	(void)write(fd,content,strlen(content)); close(fd);
10	reyssat	1076	}
		1077
8343	bpr	1078	/* system(), but with variable parms
		1079	* Uses sh to execute command.
		1080	*/
10	reyssat	1081	int call_sh(char *s,...)
		1082	{
12242	bpr	1083	va_list vp;
		1084	char buf[MAX_LINELEN+1];
		1085	char *abuf[8];
10	reyssat	1086
12242	bpr	1087	if(robot_access) return 0;
		1088	va_start(vp,s);
		1089	vsnprintf(buf,sizeof(buf),s,vp);
		1090	va_end(vp);
		1091	abuf[0]="sh"; abuf[1]="-c"; abuf[2]=buf; abuf[3]=NULL;
		1092	return execredirected(abuf[0],NULL,NULL,NULL,abuf);
10	reyssat	1093	}
		1094
		1095	void _getdef(char buf[], char *name, char value[])
		1096	{
12242	bpr	1097	char p1, p2, p3, p4;
10	reyssat	1098
12242	bpr	1099	if(name==0) goto nothing; / this would create segfault. */
		1100	for(p1=strstr(buf,name); p1!=NULL; p1=strstr(p1+1,name)) {
		1101	p2=find_word_start(p1+strlen(name));
		1102	if((p1>buf && !isspace((p1-1))) \|\| p2!='=') continue;
		1103	p3=p1; while(p3>buf && *(p3-1)!='\n') p3--;
		1104	p3=find_word_start(p3);
		1105	if(p3<p1 && *p3!='!') continue;
		1106	if(p3<p1) {
		1107	p3++; p4=find_word_end(p3);
		1108	if(find_word_start(p4)!=p1) continue;
		1109	if(p4-p3!=3 \|\| (strncmp(p3,"set",3)!=0 &&
		1110	strncmp(p3,"let",3)!=0 &&
		1111	strncmp(p3,"def",3)!=0)) {
		1112	if(p4-p3!=6 \|\| strncmp(p3,"define",6)!=0) continue;
5505	bpr	1113	}
10	reyssat	1114	}
12242	bpr	1115	p2++;p3=strchr(p2,'\n'); if(p3==NULL) p3=p2+strlen(p2);
		1116	p2=find_word_start(p2);
		1117	if(p2>p3) goto nothing;
		1118	if(p3-p2>=MAX_LINELEN) user_error("cmd_output_too_long");
		1119	memmove(value,p2,p3-p2); value[p3-p2]=0;
		1120	strip_trailing_spaces(value); return;
		1121	}
10	reyssat	1122	nothing:
12242	bpr	1123	value[0]=0; return;
10	reyssat	1124	}
		1125
8155	bpr	1126	/* Get variable definition from a file.
		1127	* Result stored in buffer value of length MAX_LINELEN.
		1128	*/
10	reyssat	1129	void getdef(char fname, char name, char value[])
		1130	{
12242	bpr	1131	char buf[MAX_LINELEN+1], tbuf[MAX_LINELEN+1], nbuf[MAX_NAMELEN+1];
		1132	char p1, p2;
10	reyssat	1133
12242	bpr	1134	value[0]=0; if(readfile(fname,buf,sizeof(buf)-16)==NULL) return;
		1135	mystrncpy(value,name,MAX_LINELEN);
		1136	for(p1=value; *p1; p1=p2) {
		1137	while(p1 && !myisalnum(p1) && *p1!='_') p1++;
		1138	if(*p1==0) break;
		1139	for(p2=p1; myisalnum(p2) \|\| p2=='_'; p2++);
		1140	if(p2-p1>MAX_NAMELEN) continue;
		1141	memmove(nbuf,p1,p2-p1); nbuf[p2-p1]=0;
		1142	_getdef(buf,nbuf,tbuf);
		1143	string_modify(value,p1,p2,"%s",tbuf);
		1144	p2=p1+strlen(tbuf);
		1145	}
10	reyssat	1146	}
		1147
		1148	int _setdef_changed;
		1149
		1150	void _setdef(char buf[], char name, char value)
		1151	{
12242	bpr	1152	char p1, p2, *p3;
		1153	int n;
7646	bpr	1154
12242	bpr	1155	for(p1=strstr(buf,name); p1!=NULL; p1=strstr(p1+1,name)) {
		1156	p2=find_word_start(p1+strlen(name));
		1157	if((p1>buf && !isspace((p1-1))) \|\| p2!='=') continue;
		1158	p3=p1; while(p3>buf && *(p3-1)==' ') p3--;
		1159	if(p3>buf && *(p3-1)!='\n') continue;
		1160	p2++;p3=strchr(p2,'\n'); if(p3==NULL) p3=p2+strlen(p2);
		1161	if(strlen(value)!=p3-p2 \|\| strncmp(value,p2,p3-p2)!=0) {
		1162	string_modify(buf,p2,p3,"%s",value);
		1163	_setdef_changed++;
10	reyssat	1164	}
12242	bpr	1165	return;
		1166	}
		1167	n=strlen(buf);
		1168	if(n>0 && buf[n-1]!='\n')
		1169	snprintf(buf+n,MAX_LINELEN-n,"\n%s=%s\n",name,value);
		1170	else
		1171	snprintf(buf+n,MAX_LINELEN-n,"%s=%s\n",name,value);
		1172	_setdef_changed++;
10	reyssat	1173	}
		1174
8155	bpr	1175	/* Set variable definition to a file. */
10	reyssat	1176	void setdef(char fname, char name)
		1177	{
12242	bpr	1178	char buf[MAX_LINELEN+1];
		1179	char p1, p2, *p3;
10	reyssat	1180
12242	bpr	1181	_setdef_changed=0;
		1182	if(strchr(name,'=')==NULL) return;
		1183	for(p1=name;*p1;p1++) {
		1184	if(isspace(p1) && p1!=' ' && p1!='\n') p1=' ';
		1185	if(*p1==' ') {
		1186	for(p2=p1+1; isspace(p2) && p2!='\n'; p2++);
		1187	if(p2>p1+1) ovlstrcpy(p1+1,p2);
		1188	p2=p1+1; if(p2=='=' \|\| p2=='\n') ovlstrcpy(p1,p2);
10	reyssat	1189	}
12242	bpr	1190	}
		1191	if(readfile(fname,buf,sizeof(buf))==NULL) buf[0]=0;
		1192	for(p1=find_word_start(name); p1!=NULL; p1=p2) {
		1193	p2=strchr(p1,'\n'); if(p2!=NULL) *p2++=0;
		1194	p1=find_word_start(p1);
		1195	p3=strchr(p1,'='); if(p3==NULL) continue;
		1196	*p3++=0; p3=find_word_start(p3);
		1197	_setdef(buf,p1,p3);
		1198	}
		1199	if(_setdef_changed) accessfile(buf,"w","%s",fname);
10	reyssat	1200	}
		1201
8155	bpr	1202	/* check whether connecting host is part of given list.
		1203	* Returns 0 if no, 1 if yes.
		1204	*/
10	reyssat	1205	int checkhost(char *hlist)
		1206	{
12242	bpr	1207	char buf[MAX_LINELEN+1];
		1208	char lbuf[1024], hbuf1[256], hbuf2[256];
		1209	char p1, p2, pb, pe, *pp;
7646	bpr	1210
12242	bpr	1211	if(*remote_addr==0) return 0;
		1212	snprintf(hbuf1,sizeof(hbuf1),"+%s+",remote_addr);
		1213	if(*remote_host!=0) {
		1214	snprintf(hbuf2,sizeof(hbuf2),"+%s+",remote_host);
		1215	for(p1=hbuf2; p1; p1++) p1=tolower(*p1);
		1216	}
		1217	else hbuf2[0]=0;
		1218	mystrncpy(buf,find_word_start(hlist),sizeof(buf)); strip_trailing_spaces(buf);
		1219	for(p1=buf; *p1; p1++) {
		1220	p1=tolower(p1);
		1221	if(!myisalnum(p1) && strchr(".-_",p1)==NULL) *p1=' ';
		1222	}
		1223	if(strcmp(buf,"all")==0) return 1; /* all is all */
		1224	for(p1=find_word_start(buf); *p1; p1=find_word_start(p2)) {
		1225	p2=find_word_end(p1); if(p2) p2++=0;
		1226	if(p2-p1<3) continue;
		1227	if(myisalnum(*p1)) pb="+"; else pb="";
		1228	if(myisalnum(*(p2-1))) pe="+"; else pe="";
		1229	snprintf(lbuf,sizeof(lbuf),"%s%s%s",pb,p1,pe);
		1230	for(pp=p1; pp && (myisdigit(pp) \|\| *pp=='.'); pp++);
		1231	if(pp) pp=hbuf2; / host name */
		1232	else pp=hbuf1; /* ip number */
		1233	if(strstr(pp,lbuf)!=NULL) return 1; /* found */
		1234	}
		1235	return 0;
10	reyssat	1236	}
		1237
13011	bpr	1238	/* return 1 if a word of bf2 is a substring of host
		1239	* and if time constraints are verified
		1240	* Like checkhost, but check first time then host.
8155	bpr	1241	* The content of bf2[] is destroyed.
15414	bpr	1242	* it is possible to put a joker in the times
8155	bpr	1243	*/
10	reyssat	1244	int checkhostt(char bf2[])
		1245	{
12242	bpr	1246	char p1, p2, *p3;
15414	bpr	1247	int i;
13011	bpr	1248	/* compare with starting time */
12242	bpr	1249	for(p1=strchr(bf2,'>'); p1!=NULL; p1=strchr(p1+1,'>')) {
		1250	if(p1>bf2 && !isspace(*(p1-1))) continue;
		1251	p3=find_word_start(++p1); p2=find_word_end(p3);
		1252	if(p2-p3!=14) continue;
		1253	p3[8]='.'; p3[11]=':'; if(p2) p2++=0;
15414	bpr	1254	for (i=0; i<14; i++) if(p3[i]=='*') p3[i]=nowstr[i];
12242	bpr	1255	if(strncmp(nowstr,p3,14)<0) return 0;
		1256	ovlstrcpy(p1-1,p2); p1-=2;
		1257	}
13011	bpr	1258	/* compare with ending time */
12242	bpr	1259	for(p1=strchr(bf2,'<'); p1!=NULL; p1=strchr(p1+1,'<')) {
		1260	if(p1>bf2 && !isspace(*(p1-1))) continue;
		1261	p3=find_word_start(++p1); p2=find_word_end(p3);
		1262	if(p2-p3!=14) continue;
		1263	p3[8]='.'; p3[11]=':'; if(p2) p2++=0;
15414	bpr	1264	for (i=0; i<14; i++) if(p3[i]=='*') p3[i]=nowstr[i];
12242	bpr	1265	if(strncmp(nowstr,p3,14)>0) return 0;
		1266	ovlstrcpy(p1-1,p2); p1-=2;
		1267	}
		1268	p1=find_word_start(bf2); if(*p1==0) return 1;
		1269	return checkhost(p1);
10	reyssat	1270	}
		1271
8155	bpr	1272	/* bad identification */
10	reyssat	1273	void bad_ident(void)
		1274	{
12242	bpr	1275	if(cookiegot[0]!=0) {
		1276	}
		1277	user_error("bad_ident");
10	reyssat	1278	}
		1279
		1280	void instex_flush(void)
		1281	{
12242	bpr	1282	char *p;
		1283	setenv("texgif_style","",1);
		1284	setenv("texgif_tmpdir",tmp_dir,1);
		1285	setenv("texgif_src",instex_src,1);
		1286	setenv("texgif_outfile",instex_fname,1);
		1287	unsetenv("w_instex_color");
		1288	getwimstexsize=0; fix_tex_size(); getwimstexsize=1;
		1289	for(p=instex_fname;p;p++) if(p=='\n') *p=' ';
		1290	wrapexec=0; call_ssh("%s/%s >%s/ins.Out 2>%s/ins.Err",
		1291	bin_dir,instex_processor,
		1292	tmp_dir,tmp_dir);
		1293	call_ssh("mv %s %s >/dev/null 2>/dev/null", instex_fname,s2_prefix);
		1294	instex_src[0]=instex_fname[0]=0; instex_cnt=0;
10	reyssat	1295	}
		1296
8155	bpr	1297	/* put last.phtml */
10	reyssat	1298	void putlastout(void)
		1299	{
12242	bpr	1300	int t;
		1301	if(instex_cnt>0) instex_flush();
		1302	t=catfile(stdout,"%s/%s",s2_prefix,lastout);
		1303	if(t==0) printf("Content-type: text/plain\r\n\r\n");
10	reyssat	1304	}
		1305
		1306	struct sockaddr_un sun;
		1307
8155	bpr	1308	/* returns >=0 if OK. */
7646	bpr	1309
10	reyssat	1310	int kerneld(char *p, int bufsize)
		1311	{
12242	bpr	1312	int sock, s, t, t1, l, *ip;
		1313	struct timeval tv;
		1314	fd_set rset;
		1315	sock=socket(PF_UNIX,SOCK_STREAM,0);
		1316	s=connect(sock,(const struct sockaddr *)&sun,sizeof(sun));
		1317	if(s) {bad: close(sock); return -1;}
		1318	ip=(int *) p;
		1319	l=strlen(p+sizeof(int)); *ip=l;
		1320	s=write(sock,p,l+sizeof(int)); if(s!=l+sizeof(int)) goto bad;
		1321	for(t=0, l=bufsize-1; t<l+sizeof(int);) {
		1322	tv.tv_sec=2; tv.tv_usec=0;
		1323	FD_ZERO(&rset); FD_SET(sock,&rset);
		1324	if(select(sock+1,&rset,NULL,NULL,&tv)<=0) goto bad;
		1325	t1=read(sock,p+t,l+sizeof(int)-t);
		1326	if(t1+t<sizeof(int)) goto bad;
		1327	if (t1 < 0) goto bad;
		1328	l=*ip; if(l<=0) goto bad;
		1329	if(l>=bufsize-sizeof(int)-4) user_error("cmd_output_too_long");
		1330	t+=t1;
		1331	}
		1332	p[l+sizeof(int)]=0;
		1333	close(sock);
		1334	return l+sizeof(int);
10	reyssat	1335	}
		1336
		1337	void _daemoncmd(char *p)
		1338	{
12242	bpr	1339	char buf[MAX_LINELEN+1+sizeof(int)];
		1340	char p1, p2, *p3;
		1341	mystrncpy(buf+sizeof(int),p,sizeof(buf)-sizeof(int));
		1342	if(kerneld(buf,sizeof(buf))<0)
		1343	internal_error("Daemon communication error.");
		1344	p1=find_word_start(buf+sizeof(int));
		1345	p2=find_word_end(p1); if(p2) p2++=0;
		1346	if(strcmp(p1,"OK")==0) {
		1347	mystrncpy(p,p2,MAX_LINELEN); return;
		1348	}
		1349	p1=find_word_start(p2); p2=find_word_end(p1); if(p2) p2++=0;
		1350	p2=find_word_start(p2); p3=find_word_end(p2);
		1351	if(*p3) {
		1352	*p3++=0; p3=find_word_start(p3); strip_trailing_spaces(p3);
		1353	setvar("wims_error_data",p3);
		1354	}
		1355	switch(*p1) {
		1356	case '1': user_error(p2);
		1357	case '2': module_error(p2);
		1358	case '3':
		1359	default: internal_error(p2);
		1360	}
		1361	*p=0;
10	reyssat	1362	}

Subversion Repositories wimsdev

(root)/trunk/wims/src/lines.c – Rev 15414