Wireshark mailing list archives
Re: Running with special privileges in build dir, result of get_datafile_dir()
From: Guy Harris <guy () alum mit edu>
Date: Wed, 31 Aug 2011 19:58:06 -0700
On Aug 31, 2011, at 11:29 AM, Anders Broman wrote:
N.B The case I'm refereeing to is "when run from build directory" presumably the "user" is the one who built it. And if you call Wireshark with environment variables set hopefully you know what you are doing...
That would require a 100% safe way to determine when you're running from the build directory, with "100% safe" meaning "there's no way to fool Wireshark into thinking it's being run from the build directory when it's not". "WIRESHARK_RUN_FROM_BUILD_DIRECTORY is set" is clearly not 100% safe, as anybody can set it. "The directory containing the executable image is named ".libs"" is reliable only if: 1) that directory is *not* found by looking at argv[0], as argv[0] can be set arbitrarily by the user if they write their own code to run Wireshark; 2) that directory is *not* found by dladdr() looking at argv[0] or anything else controllable by the user. I think that may well be equivalent to "only if you're running on Mac OS X", OS X being the only UN*X I know of where the exec* calls pass an absolute path to the executable along with the argument list and environment (done, I think, for the benefit of app bundles), and I'm not even sure that's guaranteed not to be foolable by playing games with symbolic links. ___________________________________________________________________________ Sent via: Wireshark-dev mailing list <wireshark-dev () wireshark org> Archives: http://www.wireshark.org/lists/wireshark-dev Unsubscribe: https://wireshark.org/mailman/options/wireshark-dev mailto:wireshark-dev-request () wireshark org?subject=unsubscribe
Current thread:
- Running with special privileges in build dir, result of get_datafile_dir() Anders Broman (Aug 31)
- Re: Running with special privileges in build dir, result of get_datafile_dir() Guy Harris (Aug 31)
- Re: Running with special privileges in build dir, result of get_datafile_dir() Anders Broman (Aug 31)
- Re: Running with special privileges in build dir, result of get_datafile_dir() Guy Harris (Aug 31)
- Re: Running with special privileges in build dir, result of get_datafile_dir() Guy Harris (Aug 31)
- Re: Running with special privileges in build dir, result of get_datafile_dir() Anders Broman (Aug 31)
- Re: Running with special privileges in build dir, result of get_datafile_dir() Guy Harris (Aug 31)