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Message-ID:	<42FB51FF.3000000@byu.net>
Date:	Thu, 11 Aug 2005 07:26:23 -0600
From:	Eric Blake <ebb9 AT byu DOT net>
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To:	cygwin AT cygwin DOT com
Subject:	Re: Rsync over SSH dies before it is able to send with lots of files
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According to Eric Blake on 8/10/2005 7:09 AM:
> 
> I still want to figure out why you were getting a crash.  I tried the
> following:
> 
> $ cd /tmp
> $ mount -m
> ...
> mount -f -s -b -X "c:/cygwin/bin" "/bin"
> $ mkdir lots
> $ # 45000 invocations of touch is slow, so do 10 files at a time...
> $ for i in `seq 4500` ; do echo $i ; touch longfilename${i}0
> longfilename${i}1 longfilename${i}2 longfilename${i}3 longfilename${i}4
> longfilename${i}5 longfilename${i}6 longfilename${i}7 longfilename${i}8
> longfilename${i}9 ; done
> $ echo /cygdrive/c/cygwin/tmp/lots/*
> ... # Works, echo is a builtin
> $ /bin/echo /cygdrive/c/cygwin/tmp/lots/*
> ... # Works for me, since my /bin is mounted executable
> $ /cygdrive/c/cygwin/bin/echo /cygdrive/c/cygwin/tmp/lots/*
> bash: /cygdrive/c/cygwin/bin/echo: Argument list too long

Aha - I found something.  When I first ran the touch command above, I
stopped at about 8000 files (or about 400k for the subsequent echo command
line), which gave the nice "Argument list too long" error.  But when I
increased the number of files to 45000 (or about 2 meg of command line),
the same command failed with a segfault with bash 3.0, and gave no input
but left $? at 5 (matching EIO) on the alpha bash 3.1.  I will have to try
debugging it now, but it seems odd that exec() is dying with E2BIG in one
case and EIO when the input is even bigger.

- --
Life is short - so eat dessert first!

Eric Blake             ebb9 AT byu DOT net
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