Date: Mon, 6 Dec 2021 09:23:31 +0100 From: "Floyd, Paul" <paulf2718@gmail.com> To: freebsd-hackers@freebsd.org Subject: Re: Is it possible to determine the open file path based on the file descriptor? Message-ID: <bedb6bc1-9921-2ca3-4170-09fded925a95@gmail.com> In-Reply-To: <Ya0K7NelXkKtFtx%2B@kib.kiev.ua> References: <21b0280d-c290-f27f-98a9-0c2242380718@rawbw.com> <CAGudoHEjFvt4nijEUj0FwN0CTYmuxuqvSbiMefTeMvrXeuEkJg@mail.gmail.com> <CAGudoHHE7UcNsT5hB8zRwhjABBCP2-rtFcuHE=dhmPwvf=6XgA@mail.gmail.com> <5a00f93e-21a1-47ab-6e8e-15d24840c525@rawbw.com> <CAGudoHHpaKEo9ZfHEGrRgLE6RknM_KbmN1B5cx2%2B6jNsDzgY1A@mail.gmail.com> <20200708175300.GA2866@kib.kiev.ua> <656bf089-bcc9-748a-6db2-52f3707e863c@rawbw.com> <Ya0K7NelXkKtFtx%2B@kib.kiev.ua>
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On 2021-12-05 19:54, Konstantin Belousov wrote: > On Sun, Dec 05, 2021 at 09:53:23AM -0800, Yuri wrote: >> On 7/8/20 10:53, Konstantin Belousov wrote: >>> I think an immediately useful addition would be a sysctl or fcntl that >>> return struct kinfo_file for single file descriptor. [snip] >>> https://reviews.freebsd.org/D33277 That looks really nice. It's possible to do this with sysctl CTL_KERN / VKI_KERN_PROC / KERN_PROC_FILEDESC but that gets info for all file descriptors, meaning that you then have to search for the one that you want. https://github.com/paulfloyd/freebsd_valgrind/blob/freebsd/coregrind/m_libcfile.c#L121 (I'm not the author of that bit of code). A+ Paul
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