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DAWG.C
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DAWG.C
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/* ------------------------------------------------------------------------ */
/* */
/* WWIVTOSS! Fido/WWIV Message Tosser! */
/* */
/* A WWIV <-> Fidonet Message Tosser and Translator */
/* */
/* WWIVTOSS greatly simplifies the necessity for a seperate mail tosser */
/* and translation program to exchange messages between a WWIV BBS and */
/* Fidonet. */
/* */
/* WWIVTOSS relies heavily on code from Shay Walter's 4dog WWIV/Fido */
/* interface, as well as WWIV Source code, and features availble in the */
/* WFIDO software owned by WWIV Software Services and written by Kevin */
/* Carpenter. */
/* */
/* WWIVTOSS is NOT public domain or freeware. It is a shareware product */
/* and all rights are reserved by the author, Craig Dooley. */
/* */
/* File : DAWG.C */
/* */
/* Purpose : Handles Writing of Incoming Messages Directly To WWIV */
/* Data Bases. */
/* */
/* Credit for this section belongs to Lawrence C. Bensinger (Dawg) who */
/* provided the basic code, which I was able to modify for WWIVTOSS */
/* purposes. Permission was granted to use this code section in WWIVTOSS. */
/* */
/* ------------------------------------------------------------------------ */
#include <errno.h>
#include "vardec.h"
#include "vars.h"
#include "fcns.h"
#include "net.h"
#include "subxtr.c"
#define MAX_TO_CACHE 15 /* max postrecs to hold in cache */
/****************************************************************************/
void add_post(postrec *pp)
{
postrec p;
int close_file=0;
/* open the sub, if necessary */
if (sub_f <= 0)
{
open_sub(1);
close_file=1;
}
if (sub_f>=0)
{
/* get updated info */
read_status();
sh_lseek(sub_f, 0L, SEEK_SET);
sh_read(sub_f, &p, sizeof(postrec));
/* one more post */
p.owneruser++;
nummsgs=p.owneruser;
sh_lseek(sub_f, 0L, SEEK_SET);
sh_write(sub_f, &p, sizeof(postrec));
/* add the new post */
sh_lseek(sub_f, ((long)nummsgs)*sizeof(postrec), SEEK_SET);
sh_write(sub_f, pp, sizeof(postrec));
/* we've modified the sub */
believe_cache=0;
subchg=0;
sub_dates[curlsub]=pp->qscan;
}
if (close_file)
close_sub();
}
postrec *get_post(unsigned short mn)
/*
* Returns info for a post. Maintains a cache. Does not correct anything
* if the sub has changed.
*/
{
postrec p;
int close_file;
if (mn==0)
return(NULL);
if (subchg==1) {
/* sub has changed (detected in read_status); invalidate cache */
believe_cache=0;
/* kludge: subch==2 leaves subch indicating change, but the '2' value */
/* indicates, to this routine, that it has been handled at this level */
subchg=2;
}
/* see if we need new cache info */
if ((!believe_cache) ||
(mn<cache_start) ||
(mn>=(cache_start+MAX_TO_CACHE))) {
if (sub_f < 0) {
/* open the sub data file, if necessary */
if (open_sub(0)<0)
return(NULL);
close_file = 1;
} else {
close_file = 0;
}
/* re-read # msgs, if needed */
if (subchg==2) {
sh_lseek(sub_f, 0L, SEEK_SET);
sh_read(sub_f, &p, sizeof(postrec));
nummsgs=p.owneruser;
/* another kludge: subch==3 indicates we have re-read # msgs also */
/* only used so we don't do this every time through */
subchg=3;
/* adjust msgnum, if it is no longer valid */
if (mn>nummsgs)
mn=nummsgs;
}
/* select new starting point of cache */
if (mn >= last_msgnum) {
/* going forward */
if (nummsgs<=MAX_TO_CACHE)
cache_start=1;
else if (mn>(nummsgs-MAX_TO_CACHE))
cache_start=nummsgs-MAX_TO_CACHE+1;
else
cache_start = mn;
} else {
/* going backward */
if (mn>MAX_TO_CACHE)
cache_start = mn-MAX_TO_CACHE+1;
else
cache_start = 1;
}
if (cache_start<1)
cache_start=1;
/* read in some sub info */
sh_lseek(sub_f, ((long) cache_start)*sizeof(postrec), SEEK_SET);
sh_read(sub_f, cache, MAX_TO_CACHE*sizeof(postrec));
/* now, close the file, if necessary */
if (close_file) {
close_sub();
}
/* cache is now valid */
believe_cache = 1;
}
/* error if msg # invalid */
if ((mn<1) || (mn>nummsgs))
return(NULL);
last_msgnum=mn;
return(cache+(mn-cache_start));
}
void close_sub(void)
{
if (sub_f>=0) {
sub_f=sh_close(sub_f);
}
}
/****************************************************************************/
int open_sub(int wr)
{
postrec p;
if (sub_f>=0)
close_sub();
if (wr) {
sub_f = sh_open1(subdat_fn, O_RDWR|O_BINARY|O_CREAT);
if (sub_f>=0) {
/* re-read info from file, to be safe */
believe_cache = 0;
sh_lseek(sub_f, 0L, SEEK_SET);
sh_read(sub_f, &p, sizeof(postrec));
nummsgs=p.owneruser;
}
} else {
sub_f = sh_open1(subdat_fn, O_RDONLY|O_BINARY);
}
return(sub_f);
}
void set_net_num(int n)
{
if ((n>=0) && (n<net_num_max)) {
net_num=n;
net_name=net_networks[net_num].name;
strcpy(net_data,net_networks[net_num].dir);
net_sysnum=net_networks[net_num].sysnum;
sprintf(wwiv_net_no,"WWIV_NET=%d",net_num);
}
}
void addline(char *b, char *s, long *len)
{
strcpy(&(b[*len]),s);
*len +=strlen(s);
strcpy(&(b[*len]),"\r\n");
*len += 2;
}
#define MAX_XFER 61440 /* 60 * 1024 */
long huge_xfer(int fd, void huge *buf, unsigned sz, unsigned nel, int wr)
{
long nxfr=0, len=((long)sz) * ((long)nel);
char huge *xbuf = (char huge *)buf;
unsigned cur,cur1;
while (len>0) {
if (len>MAX_XFER)
cur=MAX_XFER;
else
cur=len;
if (wr)
cur1=sh_write(fd,(char *)xbuf,cur);
else
cur1=sh_read(fd,(char *)xbuf,cur);
if (cur1!=65535) {
len -= cur1;
nxfr += cur1;
xbuf = ((char huge *)buf) + nxfr;
/* not xbuf += cur1 due to bug in certain version of compiler */
}
if (cur1!=cur)
break;
}
return(nxfr);
}
int read_subs(void)
{
int f;
char s[81];
if(subboards)
farfree(subboards);
subboards=NULL;
max_subs=syscfg.max_subs;
subboards=(subboardrec *) mallocx(max_subs*sizeof(subboardrec), "subboards");
sprintf(s,"%sSUBS.DAT",syscfg.datadir);
f=sh_open1(s,O_RDONLY | O_BINARY);
if (f<0) {
printf("%s NOT FOUND.\n",s);
return(1);
}
num_subs=(sh_read(f,subboards, (max_subs*sizeof(subboardrec))))/
sizeof(subboardrec);
f=sh_close(f);
return(read_subs_xtr(max_subs, num_subs, subboards));
}
void save_status(void)
/* saves system status in memory to disk */
{
char s[81];
if (statusfile<0) {
sprintf(s,"%sSTATUS.DAT",syscfg.datadir);
statusfile=sh_open1(s,O_RDWR | O_BINARY);
} else {
lseek(statusfile, 0L, SEEK_SET);
}
if (statusfile<0) {
printf("STATUS.DAT >CANNOT< be saved!!");
} else {
sh_write(statusfile, (void *)(&status), sizeof(statusrec));
statusfile=sh_close(statusfile);
}
}
void get_status(int mode, int lock)
{
char s[81];
char fc[7];
int i,i1,f;
long l;
if (statusfile<0) {
sprintf(s,"%sSTATUS.DAT",syscfg.datadir);
if (lock)
statusfile=sh_open1(s,O_RDWR | O_BINARY);
else
statusfile=sh_open1(s,O_RDONLY | O_BINARY);
} else {
lseek(statusfile, 0L, SEEK_SET);
}
if (statusfile<0) {
printf("%s NOT FOUND.\n",s);
exit(4);
} else {
l=status.qscanptr;
for (i=0; i<7; i++)
fc[i]=status.filechange[i];
read(statusfile,(void *)(&status), sizeof(statusrec));
if (!lock)
statusfile=sh_close(statusfile);
if (l != status.qscanptr) {
/* kill subs cache */
for (i1=0; i1<num_subs; i1++) {
if (sub_dates)
sub_dates[i1]=0;
}
subchg=1;
gatfn[0]=0;
}
for (i=0; i<7; i++) {
if (fc[i]!=status.filechange[i]) {
switch(i) {
case filechange_names: /* re-read names.lst */
if (smallist) {
sprintf(s,"%sNAMES.LST",syscfg.datadir);
f=sh_open1(s,O_RDONLY | O_BINARY);
if (f>=0) {
huge_xfer(f, smallist, sizeof(smalrec), status.users, 0);
sh_close(f);
}
}
break;
case filechange_upload: /* kill dirs cache */
break;
case filechange_posts:
subchg=1;
gatfn[0]=0;
break;
case filechange_email:
emchg=1;
break;
}
}
}
}
}
void lock_status(void)
{
get_status(1, 1);
}
void read_status(void)
{
get_status(1, 0);
}
/****************************************************************************/
int iscan1(int si, int quick)
/*
* Initializes use of a sub value (subboards[], not usub[]). If quick, then
* don't worry about anything detailed, just grab qscan info.
*/
{
postrec p;
/* make sure we have cache space */
if (!cache) {
cache=malloca(MAX_TO_CACHE*sizeof(postrec));
if (!cache)
return(0);
}
/* forget it if an invalid sub # */
if ((si<0) || (si>=num_subs))
return(0);
/* skip this stuff if being called from the WFC cache code */
if (!quick) {
/* go to correct net # */
if (xsubs[si].num_nets)
set_net_num(xsubs[si].nets[0].net_num);
else
set_net_num(0);
/* see if a sub has changed */
read_status();
/* if already have this one set, nothing more to do */
if (si==currsub)
return(1);
}
currsub=si;
/* sub cache no longer valid */
believe_cache=0;
/* set sub filename */
sprintf(subdat_fn,"%s%s.SUB",syscfg.datadir,subboards[si].filename);
/* open file, and create it if necessary */
if (open_sub(0)<0) {
if (open_sub(1)<0)
return(0);
p.owneruser=0;
sh_write(sub_f,(void *) &p,sizeof(postrec));
}
/* set sub */
curlsub=si;
subchg=0;
last_msgnum=0;
/* read in first rec, specifying # posts */
sh_lseek(sub_f,0L,SEEK_SET);
sh_read(sub_f,&p, sizeof(postrec));
nummsgs=p.owneruser;
/* read in sub date, if don't already know it */
if (sub_dates[si]==0) {
if (nummsgs) {
sh_lseek(sub_f, ((long) nummsgs)*sizeof(postrec), SEEK_SET);
sh_read(sub_f, &p, sizeof(postrec));
sub_dates[si]=p.qscan;
} else {
sub_dates[si]=1;
}
}
/* close file */
close_sub();
/* iscanned correctly */
return(1);
}
/****************************************************************************/
int iscan(int b)
/*
* Initializes use of a sub (usub[] value, not subboards[] value).
*/
{
return(iscan1(b, 0));
}
void savebase(int b)
/* saves message information in memory to disk */
{
int f;
char s[81];
sprintf(s, "%s%s.SUB", syscfg.datadir, subboards[b].filename);
f = sh_open(s, O_RDWR | O_BINARY | O_TRUNC | O_CREAT, S_IREAD | S_IWRITE);
sh_lseek(f, 0L, SEEK_SET);
msgs[0].owneruser = nummsgs;
sh_write(f, (void *)(&msgs[0]), ((nummsgs+1) * sizeof(postrec)));
sh_close(f);
if (nummsgs) {
sub_dates[b]=msgs[nummsgs].qscan;
} else {
sub_dates[b]=1;
}
lock_status();
status.filechange[filechange_posts]++;
save_status();
}
int open_file(char *fn)
/* opens a WWIV Type-2 data file */
{
int f,i;
char s[81];
sprintf(s,"%s%s.DAT",syscfg.msgsdir,fn);
f=sh_open1(s,O_RDWR | O_BINARY);
if (f<0) {
f=sh_open(s,O_RDWR | O_BINARY | O_CREAT, S_IREAD | S_IWRITE);
for (i=0; i<2048; i++)
gat[i]=0;
sh_write(f,(void *)gat,4096);
strcpy(gatfn,fn);
/* chsize(f,4096L + (75L * 1024L)); */
}
if (strcmp(gatfn,fn)) {
sh_lseek(f,0L,SEEK_SET);
sh_read(f,(void *)gat,4096);
strcpy(gatfn,fn);
}
return(f);
}
void remove_link(messagerec *m1, char *aux)
/* deletes a message */
{
messagerec m;
char s[81],s1[81];
int f;
long csec,nsec;
m=*m1;
strcpy(s,syscfg.msgsdir);
switch(m.storage_type) {
case 0:
case 1:
ltoa(m.stored_as,s1,16);
if (m.storage_type==1) {
strcat(s,aux);
strcat(s,"\\");
}
strcat(s,s1);
unlink(s);
break;
case 2:
f=open_file(aux);
csec=m.stored_as;
while ((csec>0) && (csec<2048)) {
nsec=(long) gat[csec];
gat[csec]=0;
csec=nsec;
}
sh_lseek(f,0L,SEEK_SET);
sh_write(f,(void *)gat,4096);
sh_close(f);
break;
default:
/* illegal storage type */
break;
}
setcbrk(1);
}
#define GATSECLEN (4096L+2048L*512L)
#ifndef MSG_STARTING
#define MSG_STARTING (((long)gat_section)*GATSECLEN + 4096L)
#endif
void set_gat_section(int f, int section)
{
long l,l1;
int i;
if (gat_section!=section) {
l=filelength(f);
l1=((long)section)*GATSECLEN;
if (l<l1) {
chsize(f,l1);
l=l1;
}
sh_lseek(f,l1,SEEK_SET);
if (l<(l1+4096L)) {
for (i=0; i<2048; i++)
gat[i]=0;
sh_write(f,(void *)gat, 4096);
} else {
sh_read(f,(void *)gat, 4096);
}
gat_section=section;
}
}
void save_gat(int f)
{
long l;
l=((long)gat_section)*GATSECLEN;
sh_lseek(f,l,SEEK_SET);
sh_write(f,(void *)gat,4096);
lock_status();
status.filechange[filechange_posts]++;
save_status();
}
void savefile(char *b, long l1, messagerec *m1, char *aux)
/* saves a message in memory to disk */
{
int f,gatp,i5,i4,gati[128];
messagerec m;
char s[81],s1[81];
int section;
long l2;
setcbrk(0);
m=*m1;
switch(m.storage_type) {
case 0:
case 1:
lock_status();
m.stored_as=status.qscanptr++;
save_status();
ltoa(m.stored_as,s1,16);
strcpy(s,syscfg.msgsdir);
if (m.storage_type==1) {
strcat(s,aux);
strcat(s,"\\");
}
strcat(s,s1);
f=sh_open(s,O_RDWR | O_CREAT | O_BINARY,S_IREAD | S_IWRITE);
sh_write(f, (void *)b,l1);
sh_close(f);
break;
case 2:
f=open_file(aux);
if (f>0) {
for (section=0; section<1024; section++) {
set_gat_section(f,section);
gatp=0;
i5=(int) ((l1 + 511L)/512L);
i4=1;
while ((gatp<i5) && (i4<2048)) {
if (gat[i4]==0)
gati[gatp++]=i4;
++i4;
}
if (gatp>=i5) {
l2=MSG_STARTING;
gati[gatp]=-1;
for (i4=0; i4<i5; i4++) {
sh_lseek(f,l2 + 512L * (long)(gati[i4]),SEEK_SET);
sh_write(f,(void *)(&b[i4*512]),512);
gat[gati[i4]]=gati[i4+1];
}
save_gat(f);
break;
}
}
sh_close(f);
}
m.stored_as=((long) gati[0]) + ((long)gat_section)*2048L;
break;
case 255:
f=sh_open(aux,O_RDWR | O_CREAT | O_BINARY,S_IREAD | S_IWRITE);
sh_write(f, (void *)b,l1);
sh_close(f);
break;
default:
break;
}
farfree((void *)b);
*m1=m;
}
char *readfile(messagerec *m1, char *aux, long *l)
/* reads a message from disk into memory */
{
int f,csec;
long l1,l2;
char *b,s[81],s1[81];
messagerec m;
setcbrk(0);
*l=0L;
m=*m1;
switch(m.storage_type) {
case 0:
case 1:
strcpy(s,syscfg.msgsdir);
ltoa(m.stored_as,s1,16);
if (m.storage_type==1) {
strcat(s,aux);
strcat(s,"\\");
}
strcat(s,s1);
f=sh_open1(s,O_RDONLY | O_BINARY);
if (f==-1) {
*l=0L;
return(NULL);
}
l1=filelength(f);
if ((b=(char *)farmalloc(l1))==NULL) {
sh_close(f);
return(NULL);
}
sh_read(f,(void *)b,l1);
sh_close(f);
*l=l1;
break;
case 2:
f=open_file(aux);
csec=m.stored_as;
l1=0;
while ((csec>0) && (csec<2048)) {
l1+=512L;
csec=gat[csec];
}
if (!l1) {
sh_close(f);
return(NULL);
}
if ((b=(char *)farmalloc(l1))==NULL) {
sh_close(f);
return(NULL);
}
csec=m.stored_as;
l1=0;
while ((csec>0) && (csec<2048)) {
sh_lseek(f,4096L + 512L*csec,SEEK_SET);
l1+=(long)read(f,(void *)(&(b[l1])),512);
csec=gat[csec];
}
sh_close(f);
l2=l1-512;
while ((l2<l1) && (b[l2]!=26))
++l2;
*l=l2;
break;
case 255:
f=sh_open1(aux,O_RDONLY | O_BINARY);
if (f==-1) {
*l=0L;
return(NULL);
}
l1=filelength(f);
if ((b=(char *)farmalloc(l1+256L))==NULL) {
sh_close(f);
return(NULL);
}
sh_read(f,(void *)b,l1);
sh_close(f);
*l=l1;
break;
default:
/* illegal storage type */
*l=0L;
b=NULL;
break;
}
return(b);
}
unsigned char *getnetfile(void)
{
int i,z;
char t[81];
static unsigned char sy[256];
strcpy(sy,"");
z=0;
for (i = 0; (z!=1) ; i++) {
sprintf(t,"%sP-0-%d.NET",net_data,i);
if (!(exist(t))) {
z=1;
strcpy(sy,t);
return(sy);
}
}
strcpy(sy,t);
return(sy);
}
void gate_msg(net_header_rec *nh, char *text, unsigned short nn, char *byname,unsigned int *list, unsigned short fnn)
{
char newname[128], fn[100], qn[100], on[100];
char *ti, nm[82], *ss;
int f,i;
unsigned short ntl;
if (strlen(text)<80) {
ti=text;
text+=strlen(ti)+1;
ntl=nh->length-strlen(ti)-1;
ss=strchr(text,'\r');
if (ss && (ss-text<80) && (ss-text<ntl)) {
strncpy(nm,text,ss-text);
nm[ss-text]=0;
ss++;
if (*ss=='\n')
ss++;
nh->length-=(ss-text);
ntl-=(ss-text);
text=ss;
qn[0]=on[0]=0;
if (fnn==65535) {
strcpy(newname,nm);
ss=strrchr(newname,'@');
if (ss) {
sprintf(ss+1,"%u",net_networks[nn].sysnum);
ss=strrchr(nm,'@');
if (ss) {
++ss;
while ((*ss>='0') && (*ss<='9'))
++ss;
strcat(newname,ss);
}
strcat(newname,"\r\n");
}
} else {
if ((nm[0]=='`') && (nm[1]=='`')) {
for (i=strlen(nm)-2; i>0; i--) {
if ((nm[i]=='`') && (nm[i+1]=='`')) {
break;
}
}
if (i>0) {
i+=2;
strncpy(qn,nm,i);
qn[i]=' ';
qn[i+1]=0;
}
} else
i=0;
if (qn[0]==0) {
ss=strrchr(nm,'#');
if (ss) {
if ((ss[1]>='0') && (ss[1]<='9')) {
*ss=0;
ss--;
while ((ss>nm) && (*ss==' ')) {
*ss=0;
ss--;
}
}
}
if (nm[0]) {
if (nh->fromuser)
sprintf(qn,"``%s`` ",nm);
else
strcpy(on,nm);
}
}
if ((on[0]==0) && (nh->fromuser==0)) {
strcpy(on,nm+i);
}
if (on[0])
sprintf(newname,"%s%s %s AT %u\r\n",qn, net_networks[fnn].name,
on, nh->fromsys);
else
sprintf(newname,"%s%s #%u AT %u\r\n",qn, net_networks[fnn].name,
nh->fromuser, nh->fromsys);
nh->fromsys=net_networks[nn].sysnum;
nh->fromuser=0;
}
nh->length += strlen(newname);
if ((nh->main_type == main_type_email_name) ||
(nh->main_type == main_type_new_post))
nh->length += strlen(byname)+1;
sprintf(fn,"%sP0-WT.NET",net_data);
f=sh_open(fn,O_RDWR|O_BINARY|O_APPEND | O_CREAT, S_IREAD|S_IWRITE);
if (f) {
sh_lseek(f,0L,SEEK_END);
if (!list)
nh->list_len=0;
if (nh->list_len)
nh->tosys=0;
sh_write(f,nh, sizeof(net_header_rec));
if (nh->list_len)
sh_write(f,list,2*(nh->list_len));
if ((nh->main_type == main_type_email_name) ||
(nh->main_type == main_type_new_post))
sh_write(f,byname, strlen(byname)+1);
sh_write(f,ti,strlen(ti)+1);
sh_write(f,newname,strlen(newname));
sh_write(f,text,ntl);
sh_close(f);
}
}
}
}
void send_net(net_header_rec *nh, unsigned int *list, char *text, char *byname)
{
int f;
char s[100];
long l1;
sprintf(s,"%sP0-WT.NET",net_data);
f=sh_open(s,O_RDWR | O_BINARY | O_APPEND | O_CREAT, S_IREAD | S_IWRITE);
sh_lseek(f,0L,SEEK_END);
if (!list)
nh->list_len=0;
if (!text)
nh->length=0;
if (nh->list_len)
nh->tosys=0;
l1=nh->length;
if (byname && *byname)
nh->length += strlen(byname)+1;
sh_write(f,(void *)nh,sizeof(net_header_rec));
if (nh->list_len)
sh_write(f,(void *)list,2*(nh->list_len));
if (byname && *byname)
sh_write(f,byname, strlen(byname)+1);
if (nh->length)
sh_write(f,(void *)text,l1);
sh_close(f);
}
void send_net_post(postrec *p, char *extra, int subnum)
{
net_header_rec nh, nh1;
char *b, *b1,s[81];
long len1, len2;
int f,i,onn,nn,n,nn1;
unsigned int *list;
xtrasubsnetrec *xnp;
if (extra[0]==0)
return;
b=readfile(&(p -> msg),extra,&len1);
if (b==NULL)
return;
onn=net_num;
if (p->status & status_post_new_net)
nn=p->title[80];
else if (xsubs[subnum].num_nets)
nn=xsubs[subnum].nets[0].net_num;
else
nn=net_num;
nn1=nn;
if (p->ownersys==0)
nn=-1;
nh1.tosys=0;
nh1.touser=0;
nh1.fromsys=p->ownersys;
nh1.fromuser=p->owneruser;
nh1.list_len=0;
nh1.daten=p->daten;
nh1.length=len1+1+strlen(p -> title);
nh1.method=0;
if (nh1.length > 32755) {
nh1.length = 32755;
len1=nh1.length-strlen(p->title)-1;
}
if ((b1=(char *)malloca(nh1.length+100))==NULL) {
farfree(b);
set_net_num(onn);
return;
}
strcpy(b1,p -> title);
memmove(&(b1[strlen(p -> title)+1]),b,(unsigned int) len1);
farfree(b);
for (n=0; n<xsubs[subnum].num_nets; n++) {
xnp=&(xsubs[subnum].nets[n]);
if ((xnp->net_num==nn) && (xnp->host))
continue;
set_net_num(xnp->net_num);
nh=nh1;
list=NULL;
nh.minor_type=xnp->type;
if (!nh.fromsys)
nh.fromsys=net_sysnum;
if (xnp->host) {
nh.main_type=main_type_pre_post;
nh.tosys=xnp->host;
} else {
nh.main_type=main_type_post;
sprintf(s,"%sN%s.NET",net_data, xnp->stype);
f=sh_open1(s,O_RDONLY|O_BINARY);