Subject: ftpd stuck in read when in STOR mode
To: None <tech-userlevel@NetBSD.ORG>
From: Gerryt <>
List: tech-userlevel
Date: 03/12/1998 17:01:13
We have an ftp server for clients to upload web pages to 
their home directories. SOME people experience a gradual
slow down in transfer rate until the session stops altogether.
They disconnect and try again - and again and again.

Trouble is, OUR side stays alive stuck in read() everytime
they do this. : <

Its bad enough that uploads fail but it worse when they
dont know they are dead....

Our ftp server - an i386 1.2.1 box  (ftpd Version 7.02) gets stuck here in
ftpd.c :

static int
receive_data(instr, outstr)
        FILE *instr, *outstr;
        int     c, cnt, bare_lfs;
        char    buf[BUFSIZ];
#ifdef __GNUC__
        (void) &bare_lfs;

        bare_lfs = 0;
        if (setjmp(urgcatch)) {
                transflag = 0;
                return (-1);

        switch (type) {

        case TYPE_I:
        case TYPE_L:
                while ((cnt = read(fileno(instr), buf, sizeof(buf))) > 0) {
			/* Help! I'm stuck here! */

                        if (write(fileno(outstr), buf, cnt) != cnt)
                                goto file_err;
                        byte_count += cnt;
                if (cnt < 0)
                        goto data_err;
                transflag = 0;
                return (0);

>From home I have become a Windows 95 (ugh) person and am able to upload 3-4 MB
files in ascii or binary mode no problem. Same with my old BSD/OS 2.1 box.. Our
former Web designer was the first to bring this to my attention - he uses a Mac
hmmm.. Not sure about the others.