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From: shadow@pawl.rpi.edu (Deven T. Corzine)
Newsgroups: comp.sys.amiga
Subject: Re: Fred Fish, PD programs
Message-ID: <195@rpi.edu>
Date: 17 Jan 89 10:18:09 GMT
References: <6540@louie.udel.EDU> <14892@cisunx.UUCP> <1624@cveg.uucp> <146@rpi.edu> <34@snll-arpagw.UUCP>
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Organization: Rensselaer Polytechnic Institute, Troy, NY
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[line eater? what li

In article <34@snll-arpagw.UUCP> paolucci@snll-arpagw.UUCP (Sam Paolucci) writes:
>In article <146@rpi.edu> shadow@pawl.rpi.edu (Deven T. Corzine) writes:
>->Actually, I've noticed that on every Unix system I've used ftp on, the
>->number of hash marks is never quite the same, even for the same file.
>->And the number of hash marks is always at least as many as there
>->should be, but usually more.  For example, transferring an 80K file,
>->you might get 93 hash marks one time, and 107 another. My
>->interpretation of why this happens is that in the code, it does a
>->read(fd,buf,1024) to read 1K, printing a hash mark for that 1K, but
>->not taking into account (as far as printing hash marks goes) that the
>->read call may return less than 1024 bytes read. So you end up with
>->extra reads, and therefore an inappropriate number of hash marks
>->printed. I believe it has the same problem with writes, also. (Haven't
>->watched carefully; I usually do "ftp" get commands so the umask value
>->will take effect.) JTYMLTK.
>
>Another possibility is that some packets were bad so they had to be
>retransmitted again :^).
>
>->Deven
>->
>->------- shadow@pawl.rpi.edu --- Deven Thomas Corzine -------------------------
>-- 
>					-+= SAM =+-
>"the best things in life are free"
>
>				ARPA: paolucci@snll-arpagw.llnl.gov


Oh, sure.  Happens ALL the time.  After all, TCP is just SOOO
unreliable...  :-)

BTW, ftp apprears to get the number of hash marks right on "put"
commands.  Only the "get" commands exhibit the flaw.

Deven

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------- shadow@pawl.rpi.edu ------- Deven Thomas Corzine ---------------------
Cogito  shadow@acm.rpi.edu          2346 15th Street            Pi-Rho America
ergo    userfxb6@rpitsmts.bitnet    Troy, NY 12180-2306         (518) 272-5847
sum...     In the immortal words of Socrates:  "I drank what?"     ...I think.