From: "Frank Filz" <ffilzlnx@mindspring.com>
To: "'Peter Chen'" <peter.feifan.chen@gmail.com>,
<linux-fsdevel@vger.kernel.org>
Subject: RE: Getting the file path of a file descriptor
Date: Mon, 18 Jul 2016 13:27:36 -0700 [thread overview]
Message-ID: <008c01d1e132$d2ba63a0$782f2ae0$@mindspring.com> (raw)
In-Reply-To: <CAMGYKAcKB5aK=Kh8ogXBY3CHAm_c8W4PTuq1NRnEjKvj4W3_iA@mail.gmail.com>
> I was wondering if I intercepted the system call such as read(). Can I get the
> file path of the file descriptor somehow from the kernel process's internal
> data structures or some helper functions? For example if I had previously
> opened a file "abcd.txt", and then called read on it, I would like to get the
> filepath "abcd.txt" from the fd for the read().
There may be zero to N paths to an open file descriptor...
> Also aside, I was wondering if it was all possible to get the file path of the
> executable of the process itself. So if I was running a program such as "ping",
> when I intercept the system calls of the program, I want to know the filepath
> of the ping program.
Argv[0], and that is the specific name the executable was invoked by (some utilities actually use this to behave differently based on execution name...).
Frank
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next prev parent reply other threads:[~2016-07-18 20:27 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-18 19:13 Getting the file path of a file descriptor Peter Chen
2016-07-18 20:27 ` Frank Filz [this message]
2016-07-19 1:33 ` Peter Chen
2016-07-19 1:59 ` Al Viro
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