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Internet Info 1994 March
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src890906.arc
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SMTPCLI.C
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C/C++ Source or Header
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1989-09-07
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21KB
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929 lines
/*
* Client routines for Simple Mail Transfer Protocol ala RFC821
* A.D. Barksdale Garbee II, aka Bdale, N3EUA
* Copyright 1986 Bdale Garbee, All Rights Reserved.
* Permission granted for non-commercial copying and use, provided
* this notice is retained.
* Modified 14 June 1987 by P. Karn for symbolic target addresses,
* also rebuilt locking mechanism
* Copyright 1987 1988 David Trulli, All Rights Reserved.
* Permission granted for non-commercial copying and use, provided
* this notice is retained.
*/
#include <stdio.h>
#include <fcntl.h>
#include <time.h>
#include <setjmp.h>
#ifdef UNIX
#include <sys/types.h>
#endif
#ifdef __TURBOC__
#include <dir.h>
#include <io.h>
#endif
#include "global.h"
#ifdef ANSIPROTO
#include <stdarg.h>
#endif
#include "mbuf.h"
#include "cmdparse.h"
#include "proc.h"
#include "socket.h"
#include "timer.h"
#include "netuser.h"
#include "smtp.h"
#include "dirutil.h"
extern char Badhost[];
static struct timer smtpcli_t;
static int32 gateway;
#ifdef SMTPTRACE
static int Smtptrace = 0; /* used for trace level */
static int dosmtptrace();
#endif
static unsigned short smtpmaxcli = MAXSESSIONS; /* the max client connections allowed */
static int smtpsessions = 0; /* number of client connections
* currently open */
int Smtpmode = 0;
static struct smtpcli *cli_session[MAXSESSIONS]; /* queue of client sessions */
static char quitcmd[] = "QUIT\r\n";
static char eom[] = "\r\n.\r\n";
static void abort_trans __ARGS((struct smtpcli *cb));
static void del_job __ARGS((struct smtp_job *jp));
static void del_session __ARGS((struct smtpcli *cb));
static int dogateway __ARGS((int argc,char *argv[],void *p));
static int dosmtpmaxcli __ARGS((int argc,char *argv[],void *p));
static int dotimer __ARGS((int argc,char *argv[],void *p));
static void execjobs __ARGS((void));
static void logerr __ARGS((struct smtpcli *cb));
static struct smtpcli *lookup __ARGS((int32 destaddr));
static struct smtpcli *newcb __ARGS((void));
static int next_job __ARGS((struct smtpcli *cb));
static void retmail __ARGS((struct smtpcli *cb));
static void sendcmd __ARGS((struct smtpcli *cb,char *fmt,...));
static int sendfile __ARGS((struct smtpcli *cb));
static void sendquit __ARGS((struct smtpcli *cb));
static int setsmtpmode __ARGS((int argc,char *argv[],void *p));
static struct smtp_job *setupjob __ARGS((struct smtpcli *cb,char *id,char *from));
static void smtp_send __ARGS((int unused,void *cb1,void *p));
static int smtpkick __ARGS((int argc,char *argv[],void *p));
static struct cmds Smtpcmds[] = {
"gateway", dogateway, 0, 0, NULLCHAR,
"mode", setsmtpmode, 0, 0, NULLCHAR,
"kick", smtpkick, 0, 0, NULLCHAR,
"maxclients", dosmtpmaxcli, 0, 0, NULLCHAR,
"timer", dotimer, 0, 0, NULLCHAR,
#ifdef SMTPTRACE
"trace", dosmtptrace, 0, 0, NULLCHAR,
#endif
NULLCHAR,
};
int
dosmtp(argc,argv,p)
int argc;
char *argv[];
void *p;
{
return subcmd(Smtpcmds,argc,argv,p);
}
static int
dosmtpmaxcli(argc,argv,p)
int argc;
char *argv[];
void *p;
{
return setshort(&smtpmaxcli,"Max clients",argc,argv);
}
static int
setsmtpmode(argc,argv,p)
int argc;
char *argv[];
void *p;
{
if (argc < 2) {
printf("smtp mode: %s\n",
(Smtpmode & QUEUE) ? "queue" : "route");
} else {
switch(*argv[1]) {
case 'q':
Smtpmode |= QUEUE;
break;
case 'r':
Smtpmode &= ~QUEUE;
break;
default:
printf("Usage: smtp mode [queue | route]\n");
break;
}
}
return 0;
}
static int
dogateway(argc,argv,p)
int argc;
char *argv[];
void *p;
{
int32 n;
if(argc < 2){
printf("%s\n",inet_ntoa(gateway));
} else if((n = resolve(argv[1])) == 0){
printf(Badhost,argv[1]);
return 1;
} else
gateway = n;
return 0;
}
#ifdef SMTPTRACE
static int
dosmtptrace(argc,argv,p)
int argc;
char *argv[];
void *p;
{
return setbool(&Smtptrace,"SMTP tracing",argc,argv);
}
#endif
/* Set outbound spool scan interval */
static int
dotimer(argc,argv,p)
int argc;
char *argv[];
void *p;
{
if(argc < 2){
printf("%lu/%lu\n",
(smtpcli_t.start - smtpcli_t.count)/(1000/MSPTICK),
smtpcli_t.start/(1000/MSPTICK));
return 0;
}
smtpcli_t.func = (void (*)())smtptick;/* what to call on timeout */
smtpcli_t.arg = NULL; /* dummy value */
smtpcli_t.start = atol(argv[1])*(1000/MSPTICK); /* set timer duration */
start_timer(&smtpcli_t); /* and fire it up */
return 0;
}
static int
smtpkick(argc,argv,p)
int argc;
char *argv[];
void *p;
{
smtptick(NULL);
return 0;
}
/* This is the routine that gets called every so often to do outgoing
* mail processing. When called with a null argument, it runs the entire
* queue; if called with a specific non-zero IP address from the remote
* kick server, it only starts up sessions to that address.
*/
int
smtptick(t)
void *t;
{
register struct smtpcli *cb;
struct smtp_job *jp;
struct list *ap;
char tmpstring[LINELEN], wfilename[13], prefix[9];
char from[LINELEN], to[LINELEN];
char *cp, *cp1;
int32 destaddr,target;
FILE *wfile;
target = (int32)t;
#ifdef SMTPTRACE
if (Smtptrace > 5)
printf("smtp daemon entered, target = %s\n",inet_ntoa(target));
#endif
for(filedir(Mailqueue,0,wfilename);wfilename[0] != '\0';
filedir(Mailqueue,1,wfilename)){
/* save the prefix of the file name which it job id */
cp = wfilename;
cp1 = prefix;
while (*cp && *cp != '.')
*cp1++ = *cp++;
*cp1 = '\0';
/* lock this file from the smtp daemon */
if (mlock(Mailqdir,prefix))
continue;
sprintf(tmpstring,"%s/%s",Mailqdir,wfilename);
if ((wfile = fopen(tmpstring,READ_TEXT)) == NULLFILE) {
/* probably too many open files */
(void) rmlock(Mailqdir,prefix);
/* continue to next message. The failure
* may be temporary */
continue;
}
(void) fgets(tmpstring,LINELEN,wfile); /* read target host */
rip(tmpstring);
if ((destaddr = mailroute(tmpstring)) == 0) {
fclose(wfile);
printf("** smtp: Unknown address %s\n",tmpstring);
(void) rmlock(Mailqdir,prefix);
continue;
}
if(target != 0 && destaddr != target){
fclose(wfile);
(void) rmlock(Mailqdir,prefix);
continue; /* Not the proper target of a kick */
}
if ((cb = lookup(destaddr)) == NULLSMTPCLI) {
/* there are enough processes running already */
if (smtpsessions >= smtpmaxcli) {
#ifdef SMTPTRACE
if (Smtptrace) {
printf("smtp daemon: too many processes\n");
}
#endif
fclose(wfile);
(void) rmlock(Mailqdir,prefix);
break;
}
if ((cb = newcb()) == NULLSMTPCLI) {
fclose(wfile);
(void) rmlock(Mailqdir,prefix);
break;
}
cb->ipdest = destaddr;
} else {
/* This system is already is sending mail lets not
* interfere with its send queue.
*/
if (cb->state != CLI_INIT_STATE) {
fclose(wfile);
(void) rmlock(Mailqdir,prefix);
continue;
}
}
(void) fgets(from,LINELEN,wfile); /* read from */
rip(from);
if ((jp = setupjob(cb,prefix,from)) == NULLJOB) {
fclose(wfile);
(void) rmlock(Mailqdir,prefix);
del_session(cb);
break;
}
while (fgets(to,LINELEN,wfile) != NULLCHAR) {
rip(to);
if (addlist(&jp->to,to,DOMAIN) == NULLLIST) {
fclose(wfile);
del_session(cb);
}
}
fclose(wfile);
#ifdef SMTPTRACE
if (Smtptrace > 1) {
printf("queue job %s From: %s To:",prefix,from);
for (ap = jp->to; ap != NULLLIST; ap = ap->next)
printf(" %s",ap->val);
printf("\n");
}
#endif
}
/* start sending that mail */
execjobs();
/* Restart timer */
start_timer(&smtpcli_t);
return 0;
}
/* this is the master state machine that handles a single SMTP transaction */
/* it is called with a queue of jobs for a particular host. */
static void
smtp_send(unused,cb1,p)
int unused;
void *cb1;
void *p;
{
register struct smtpcli *cb;
register char reply;
register struct list *tp;
struct sockaddr_in fsocket;
struct mbuf *bp,*bpl;
char *cp;
char tbuf[LINELEN];
int rcode;
cb = (struct smtpcli *)cb1;
fsocket.sin_family = AF_INET;
fsocket.sin_addr.s_addr = cb->ipdest;
fsocket.sin_port = IPPORT_SMTP;
cb->s = socket(AF_INET,SOCK_STREAM,0);
cb->state = CLI_OPEN_STATE; /* init state placeholder */
#ifdef SMTPTRACE
if (Smtptrace)
printf("SMTP client Trying...\n");
#endif
if(connect(cb->s,(char *)&fsocket,SOCKSIZE) == 0){
#ifdef SMTPTRACE
if (Smtptrace)
printf("Connected\n");
#endif
;
} else {
cp = sockerr(cb->s);
#ifdef SMTPTRACE
if (Smtptrace)
printf("Connect failed: %s\n",cp != NULLCHAR ? cp : "");
#endif
log(cb->s,"Connect failed: %s\n",cp != NULLCHAR ? cp : "");
}
while(1) {
if (recvline(cb->s,cb->buf,LINELEN) == -1)
goto quit;
rip(cb->buf);
#ifdef SMTPTRACE
if (Smtptrace)
printf("smtp rcvd: '%s'\n",cb->buf);
#endif
/* Another line follows, ignore this one */
if(cb->buf[0] == '0' || cb->buf[3] == '-')
continue;
reply = cb->buf[0];
rcode = atoi(cb->buf);
/* if service shuting down */
if (rcode == 421) {
sendquit(cb);
continue;
}
switch(cb->state) {
case CLI_OPEN_STATE:
if (reply != '2')
sendquit(cb);
else {
cb->state = CLI_HELO_STATE;
sendcmd(cb,"HELO %s\r\nMAIL FROM:<%s>\r\n",
Hostname,cb->jobq->from);
}
break;
case CLI_HELO_STATE:
if (reply != '2')
sendquit(cb);
else
cb->state = CLI_MAIL_STATE;
break;
case CLI_MAIL_STATE:
if (reply != '2')
sendquit(cb);
else {
cb->state = CLI_RCPT_STATE;
cb->rcpts = 0;
bpl = NULLBUF;
for (tp = cb->jobq->to; tp != NULLLIST; tp = tp->next){
sprintf(tbuf,"RCPT TO:<%s>\r\n",tp->val);
bp = qdata(tbuf,(int16)strlen(tbuf));
if (bp == NULLBUF) {
free_p(bpl);
sendquit(cb);
goto quit;
}
append(&bpl,bp);
cb->rcpts++;
#ifdef SMTPTRACE
if (Smtptrace) {
printf("smtp sent: %s",tbuf);
}
#endif
}
send_mbuf(cb->s,bpl,0,NULLCHAR,0);
}
break;
case CLI_RCPT_STATE:
if (reply == '5') {
logerr(cb);
} else if (reply == '2') {
cb->goodrcpt = 1;
} else {
/* some kind of temporary failure */
abort_trans(cb);
break;
}
/* if more rcpts stay in this state */
if (--cb->rcpts != 0)
break;
/* check for no good rcpt on the list */
if (cb->goodrcpt == 0) {
if (cb->errlog != NULLLIST)
retmail(cb);
(void) unlink(cb->wname); /* unlink workfile */
(void) unlink(cb->tname); /* unlink text */
abort_trans(cb);
break;
}
/* if this file open fails abort */
if ((cb->tfile = fopen(cb->tname,READ_TEXT)) == NULLFILE)
abort_trans(cb);
else {
sendcmd(cb,"DATA\r\n");
cb->state = CLI_SEND_STATE;
}
break;
case CLI_SEND_STATE:
if (reply == '3') {
cb->state = CLI_UNLK_STATE;
sendfile(cb);
} else {
sendquit(cb);
}
break;
case CLI_UNLK_STATE:
/* if a good transfer or permanent failure remove job */
if (reply == '2' || reply == '5') {
if (reply == '5')
logerr(cb);
/* close and unlink the textfile */
if(cb->tfile != NULLFILE) {
fclose(cb->tfile);
cb->tfile = NULLFILE;
}
if (cb->errlog != NULLLIST)
retmail(cb);
(void) unlink(cb->tname);
(void) unlink(cb->wname); /* unlink workfile */
log(cb->s,"SMTP sent job %s To: %s From: %s",
cb->jobq->jobname,cb->jobq->to->val,cb->jobq->from);
}
if (next_job(cb)) {
cb->state = CLI_MAIL_STATE;
sendcmd(cb,"MAIL FROM:<%s>\r\n",cb->jobq->from);
} else {
sendquit(cb);
cb->state = CLI_QUIT_STATE;
}
break;
case CLI_IDLE_STATE: /* used after a RSET and more mail to send */
if (reply != '2')
sendquit(cb);
else {
cb->state = CLI_MAIL_STATE;
sendcmd(cb,"MAIL FROM:<%s>\r\n",cb->jobq->from);
}
break;
case CLI_QUIT_STATE:
goto quit;
}
}
quit:
(void) close_s(cb->s);
if(cb->tfile != NULLFILE)
fclose(cb->tfile);
del_session(cb);
}
/* abort the currrent job.
* If more work exists set up the next job if
* not then shut down.
*/
static void
abort_trans(cb)
register struct smtpcli *cb;
{
#ifdef SMTPSTRACE
if (Smtptrace)
printf("smtpcli: abort transaction\n");
#endif
if(cb->tfile != NULLFILE) {
fclose(cb->tfile);
cb->tfile = NULLFILE;
}
if (next_job(cb)) {
sendcmd(cb,"RSET\r\n");
cb->state = CLI_IDLE_STATE;
} else
sendquit(cb);
}
static void
sendquit(cb)
struct smtpcli *cb;
{
cb->state = CLI_QUIT_STATE;
sendcmd(cb,quitcmd); /* issue a quit command */
}
/* Send message back to server */
#if defined(ANSIPROTO) && !defined(AMIGA)
static void
sendcmd(struct smtpcli *cb,char *fmt,...)
{
va_list ap;
struct mbuf *bp;
char tmpstring[256];
va_start(ap,fmt);
#ifdef SMTPTRACE
if (Smtptrace) {
printf("smtp sent: ");
vprintf(fmt,ap);
}
#endif
vsprintf(tmpstring,fmt,ap);
va_end(ap);
bp = qdata(tmpstring,(int16)strlen(tmpstring));
send_mbuf(cb->s,bp,0,NULLCHAR,0);
}
#else
static void
sendcmd(cb,fmt,arg1,arg2)
struct smtpcli *cb;
char *fmt,*arg1,*arg2;
{
struct mbuf *bp;
char tmpstring[256];
#ifdef SMTPTRACE
if (Smtptrace) {
printf("smtp sent: ");
printf(fmt,arg1,arg2);
}
#endif
sprintf(tmpstring,fmt,arg1,arg2);
bp = qdata(tmpstring,(int16)strlen(tmpstring));
send_mbuf(cb->s,bp,0,NULLCHAR,0);
}
#endif
/* create mail lockfile */
int
mlock(dir,id)
char *dir,*id;
{
char lockname[LINELEN];
int fd;
/* Try to create the lock file in an atomic operation */
sprintf(lockname,"%s/%s.lck",dir,id);
if((fd = open(lockname, O_WRONLY|O_EXCL|O_CREAT,0600)) == -1)
return -1;
close(fd);
return 0;
}
/* remove mail lockfile */
int
rmlock(dir,id)
char *dir,*id;
{
char lockname[LINELEN];
sprintf(lockname,"%s/%s.lck",dir,id);
return(unlink(lockname));
}
/* free the message struct and data */
static void
del_session(cb)
register struct smtpcli *cb;
{
register struct smtp_job *jp,*tp;
register int i;
if (cb == NULLSMTPCLI)
return;
for(i=0; i<MAXSESSIONS; i++)
if(cli_session[i] == cb) {
cli_session[i] = NULLSMTPCLI;
break;
}
free(cb->wname);
free(cb->tname);
for (jp = cb->jobq; jp != NULLJOB;jp = tp) {
tp = jp->next;
del_job(jp);
}
del_list(cb->errlog);
free((char *)cb);
smtpsessions--; /* number of connections active */
}
static void
del_job(jp)
register struct smtp_job *jp;
{
if ( *jp->jobname != '\0')
(void) rmlock(Mailqdir,jp->jobname);
free(jp->from);
del_list(jp->to);
free((char *)jp);
}
/* delete a list of list structs */
void
del_list(lp)
struct list *lp;
{
register struct list *tp, *tp1;
for (tp = lp; tp != NULLLIST; tp = tp1) {
tp1 = tp->next;
free(tp->val);
free((char *)tp);
}
}
/* return message to sender */
static void
retmail(cb)
struct smtpcli *cb;
{
register struct list *lp;
register FILE *tfile;
register int c;
FILE *infile;
char *to;
time_t t;
#ifdef SMTPTRACE
if (Smtptrace > 5) {
printf("smtp job %s returned to sender\n",cb->wname);
}
#endif
/* A null From<> so no looping replys to MAIL-DAEMONS */
to = cb->jobq->from;
if (*to == '\0')
return;
if ((infile = fopen(cb->tname,READ_TEXT)) == NULLFILE)
return;
if ((tfile = tmpfile()) == NULLFILE) {
fclose(infile);
return;
}
time(&t);
fprintf(tfile,"Date: %s",ptime(&t));
fprintf(tfile,"Message-Id: <%ld@%s>\n",get_msgid(),Hostname);
fprintf(tfile,"From: MAILER-DAEMON@%s\n",Hostname);
fprintf(tfile,"To: %s\n",to);
fprintf(tfile,"Subject: Failed mail\n\n");
fprintf(tfile," ===== transcript follows =====\n\n");
for (lp = cb->errlog; lp != NULLLIST; lp = lp->next)
fprintf(tfile,"%s\n",lp->val);
fprintf(tfile,"\n ===== Unsent message follows ====\n");
while((c = getc(infile)) != EOF)
if (putc(c,tfile) == EOF)
break;
fclose(infile);
fseek(tfile,0L,0);
(void) mailuser(tfile,"",to);
fclose(tfile);
}
/* look to see if a smtp control block exists for this ipdest */
static struct smtpcli *
lookup(destaddr)
int32 destaddr;
{
register int i;
for(i=0; i<MAXSESSIONS; i++) {
if (cli_session[i] == NULLSMTPCLI)
continue;
if(cli_session[i]->ipdest == destaddr)
return cli_session[i];
}
return NULLSMTPCLI;
}
/* create a new smtp control block */
static struct smtpcli *
newcb()
{
register int i;
register struct smtpcli *cb;
for(i=0; i<MAXSESSIONS; i++) {
if(cli_session[i] == NULLSMTPCLI) {
cb = (struct smtpcli *)calloc(1,sizeof(struct smtpcli));
if (cb == NULLSMTPCLI)
return(NULLSMTPCLI);
cb->wname = malloc((unsigned)strlen(Mailqdir)+JOBNAME);
if (cb->wname == NULLCHAR) {
free((char *)cb);
return(NULLSMTPCLI);
}
cb->tname = malloc((unsigned)strlen(Mailqdir)+JOBNAME);
if (cb->tname == NULLCHAR) {
free(cb->wname);
free((char *)cb);
return(NULLSMTPCLI);
}
cb->state = CLI_INIT_STATE;
cli_session[i] = cb;
smtpsessions++; /* number of connections active */
return(cb);
}
}
return NULLSMTPCLI;
}
static void
execjobs()
{
register struct smtpcli *cb;
register int i;
for(i=0; i<MAXSESSIONS; i++) {
cb = cli_session[i];
if (cb == NULLSMTPCLI)
continue;
if(cb->state != CLI_INIT_STATE)
continue;
sprintf(cb->tname,"%s/%s.txt",Mailqdir,cb->jobq->jobname);
sprintf(cb->wname,"%s/%s.wrk",Mailqdir,cb->jobq->jobname);
newproc("smtp_send", 1024, smtp_send, 0, cb,NULL);
#ifdef SMTPTRACE
if (Smtptrace)
printf("Trying Connection to %s\n",inet_ntoa(cb->ipdest));
#endif
}
}
/* add this job to control block queue */
static struct smtp_job *
setupjob(cb,id,from)
struct smtpcli *cb;
char *id,*from;
{
register struct smtp_job *p1,*p2;
p1 = (struct smtp_job *)calloc(1,sizeof(struct smtp_job));
if (p1 == NULLJOB)
return NULLJOB;
p1->from = malloc((unsigned)strlen(from) + 1);
if (p1->from == NULLCHAR) {
free((char *)p1);
return NULLJOB;
}
strcpy(p1->from,from);
strcpy(p1->jobname,id);
/* now add to end of jobq */
if ((p2 = cb->jobq) == NULLJOB)
cb->jobq = p1;
else {
while(p2->next != NULLJOB)
p2 = p2->next;
p2->next = p1;
}
return p1;
}
/* called to advance to the next job */
static int
next_job(cb)
register struct smtpcli *cb;
{
register struct smtp_job *jp;
jp = cb->jobq->next;
del_job(cb->jobq);
if (jp == NULLJOB) {
cb->jobq = NULLJOB;
return 0;
}
/* remove the error log of previous message */
del_list(cb->errlog);
cb->errlog = NULLLIST;
cb->goodrcpt = 0;
cb->jobq = jp;
sprintf(cb->tname,"%s/%s.txt",Mailqdir,jp->jobname);
sprintf(cb->wname,"%s/%s.wrk",Mailqdir,jp->jobname);
#ifdef SMTPTRACE
if (Smtptrace > 5) {
printf("sending job %s\n",jp->jobname);
}
#endif
return 1;
}
/* mail routing funtion. For now just used the hosts file */
int32
mailroute(dest)
char *dest;
{
int32 destaddr;
/* look up address or use the gateway */
if ((destaddr = resolve(dest)) == 0)
if (gateway != 0)
destaddr = gateway; /* Use the gateway */
return destaddr;
}
/* save error reply for in error list */
static void
logerr(cb)
struct smtpcli *cb;
{
register struct list *lp,*tp;
if ((tp = (struct list *)calloc(1,sizeof(struct list))) == NULLLIST)
return;
if ((tp->val = malloc((unsigned)strlen(cb->buf)+1)) == NULLCHAR) {
free((char *)tp);
return;
}
/* find end of list */
if ((lp = cb->errlog) == NULLLIST)
cb->errlog = tp;
else {
while(lp->next != NULLLIST)
lp = lp->next;
lp->next = tp;
}
strcpy(tp->val,cb->buf);
}
static int
sendfile(cb)
register struct smtpcli *cb;
{
register int c;
char *cp;
register struct mbuf *bp;
int sawnl = 1;
int error = 0;
for(;;) {
/* Hard to know what to do here */
if ((bp = alloc_mbuf(BUFSIZ)) == NULLBUF)
return EOF;
cp = bp->data;
while(bp->cnt < BUFSIZ-2 && (c = fgetc(cb->tfile)) != EOF){
if (c == '\r') /* strip cr from some pc hosts */
continue;
if (c == '\n') { /* send line end as \r\n */
*cp++ = '\r';
bp->cnt++;
sawnl = 1;
} else {
/* special case of a line with just a . sent as .. one it */
if (c == '.' && sawnl) {
c = fgetc(cb->tfile);
if ( c != EOF && c != '\n' && c != '\r')
ungetc(c,cb->tfile);
else {
*cp++ = '.';
bp->cnt++;
}
c = '.';
}
sawnl = 0;
}
*cp++ = c;
bp->cnt++;
}
if(bp->cnt != 0) {
if(send_mbuf(cb->s,bp,0,NULLCHAR,0) == -1){
error = 1;
break;
}
} else {
free_p(bp);
break;
}
}
fclose(cb->tfile);
cb->tfile = NULLFILE;
sendcmd(cb,eom);
return error;
}