Date: Tue, 10 Dec 2002 13:13:12 -0600 From: Dan Nelson <dnelson@allantgroup.com> To: George Georgalis <george@galis.org> Cc: nbari@unixmexico.com, freebsd-isp@FreeBSD.ORG, hackers@FreeBSD.ORG Subject: Re: tail -f <file> on webpage Message-ID: <20021210191312.GG48182@dan.emsphone.com> In-Reply-To: <20021210185212.GC23550@trot.local> References: <26647.148.243.211.1.1039409754.squirrel@mail.unixmexico.com> <20021209054521.GB20704@dan.emsphone.com> <20021210185212.GC23550@trot.local>
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In the last episode (Dec 10), George Georgalis said: > On Sun, Dec 08, 2002 at 11:45:22PM -0600, Dan Nelson wrote: > > #! /bin/sh > > printf "Content-type: text/plain\r\n\r\n" > > tail -f /var/log/messages > > > > Unfortunatly if you try that your webserver will quickly fail because > the connection never closes. If your customers can create cgi scripts > they can bring down your server too. > > How fast depends on httpd.conf MaxSpareServers, and how quickly you > hit reload. The connection does close, but it looks like tail does not correctly exit: kevent(0x4,0x0,0x0,0xbfbff410,0x1,0x0) = 1 (0x1) read(0x3,0x804d000,0x2000) = 90 (0x5a) read(0x3,0x804d000,0x2000) = 0 (0x0) write(1,0x804f000,90) ERR#32 'Broken pipe' kevent(0x4,0x0,0x0,0xbfbff410,0x1,0x0) = 1 (0x1) read(0x3,0x804d000,0x2000) = 85 (0x55) read(0x3,0x804d000,0x2000) = 0 (0x0) write(1,0x804f000,85) ERR#32 'Broken pipe' kevent(0x4,0x0,0x0,0xbfbff410,0x1,0x0) = 1 (0x1) read(0x3,0x804d000,0x2000) = 34 (0x22) read(0x3,0x804d000,0x2000) = 0 (0x0) write(1,0x804f000,34) ERR#32 'Broken pipe' Not sure why though. The error-checking code in tail looks fine. -- Dan Nelson dnelson@allantgroup.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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