Date: Sat, 15 Jan 2005 15:59:38 +0100 From: Jose M Rodriguez <josemi@freebsd.jazztel.es> To: Doug White <dwhite@gumbysoft.com> Cc: Jose M Rodriguez <josemi@freebsd.jazztel.es> Subject: Re: problems with devfs amd /dev/fd/ Message-ID: <41E92FDA.2070405@redesjm.local> In-Reply-To: <20050113164715.G13904@carver.gumbysoft.com> References: <41DA75E2.30302@redesjm.local> <20050113164715.G13904@carver.gumbysoft.com>
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Doug White escribió: >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. > > > Yes, but with fdescfs mounted, not with only devfs. This is not a so clean change from RELENG_4 to RELENG_5. I think this need a simple note on release docs. -- josemi
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