Date: Thu, 13 Jan 2005 16:51:14 -0800 (PST) From: Doug White <dwhite@gumbysoft.com> To: Jose M Rodriguez <josemi@freebsd.jazztel.es> Cc: stable@freebsd.org Subject: Re: problems with devfs amd /dev/fd/ Message-ID: <20050113164715.G13904@carver.gumbysoft.com> In-Reply-To: <41DA75E2.30302@redesjm.local> References: <41DA75E2.30302@redesjm.local>
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On Tue, 4 Jan 2005, Jose M Rodriguez wrote: > Hi, > > trying to import foomatic-rip, I found great changes under /dev/fd/ > going from RELENG_4 to RELENG_5. > > Seems that /dev/fd/3 is used by several pipe construct like foomatic-rip > to get a free backwards error channel. > > Digging a bit, I found that now, I need mount fdescfs to get this. I > think this is not well documented in release notes. Nothing in the FreeBSD base system depends on /dev/fd. foomatic-rip a third-party program. It would be appropriate for the port to print a message reminding the user to mount fdescfs if they plan to use this application, but not appropriate to enable it by default just for this one port. > Also, seems that support /dev/fd/3 in devfs may be a good idea. Add a > sysctl to control how many /dev/fd/n devfs create will be even better. fdesc is populated automatically based on the calling program. If the program has file descriptor 3 open then /dev/fd/3 will be available. Likewise, if it is closed, /dev/fd/3 will not exist. -- Doug White | FreeBSD: The Power to Serve dwhite@gumbysoft.com | www.FreeBSD.org
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