Date: Mon, 12 Nov 2007 14:05:25 -0800 From: Yuri <yuri@rawbw.com> To: Robert Watson <rwatson@FreeBSD.org> Cc: freebsd-hackers@FreeBSD.org Subject: Re: How to get filename of an open file descriptor Message-ID: <1194905125.4738ce25a968c@webmail.rawbw.com> In-Reply-To: <20071112214243.Y81124@fledge.watson.org> References: <1194896018.4738aa922f776@webmail.rawbw.com> <20071112214243.Y81124@fledge.watson.org>
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Robert, Thank you for your response. I attempted to compile procstat but procstat.h seems to be missing in tgz. Yuri Quoting Robert Watson <rwatson@FreeBSD.org>: > On Mon, 12 Nov 2007, Yuri wrote: > > > I am looking for functionality similar to Linux's /proc/<PID>/fd/<FD>. I > > need to know what is the file name of an open file descriptor. > > > > /proc/<PID>/fd is missing on FreeBSD. > > > > There's something called 'fdescfs'. In /dev/fd/ it shows the list of file > > > descriptors. But they don't seem to be symbolic links to open files. And > > also it only shows FDs of the current process. > > > > So why there's no /proc/<PID>/fd in FreeBSD? And how do I work around this? > > > Or should I just invest time and write a kernel patch implementing > > /proc/<PID>/fd/? > > You can give these patches a try: > > http://www.watson.org/~robert/freebsd/20071112-procstat.tgz > > They reflect a work-in-progress procstat(1) tool, which inspects process > state > in various ways. They are developed against 8-CURRENT, but likely still > apply > fairly easily to 7-STABLE. They suffer various deficiencies, such as relying > > on the name cache in-kernel to generate file paths for mapped files and open > > file descriptors, so don't currently work with devfs nodes (for example). > However, they may do what you need. Any feedback would be most welcome. > > Robert N M Watson > Computer Laboratory > University of Cambridge > --
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