On Sun, Mar 02, 2014 at 11:54:57AM +0100, Philippe Ombredanne wrote: > On Wed, Feb 26, 2014 at 2:28 AM, Dmitry V. Levin <l...@altlinux.org> wrote: > > > Fourth, I think -yy should also "canonicalize" socket descriptors, i.e. > > print their addresses in <> form, resembling lsof(8) output. This would > > be a really nice feature. > > Indeed that would be awesome and help a lot with tracing network related > calls. > > I think you meant this lsof output, for instance from a wget invocation: > > COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME > wget 3695865 pombredanne 3u IPv4 125707086 0t0 TCP > myhost.local:56120->ch3.sourceforge.net:http (ESTABLISHED) > > How would you report this? > > Would this work for the example above?: > 3<socket:[125707086] IPv4, TCP, "myhost.local:56120", > "ch3.sourceforge.net:http"> > where: > - IPv4 would be the type as reported by lsof(8) > - TCP, "myhost.local:56120" and "ch3.sourceforge.net:http" would the > parts of the node name as reported by lsof(8)
Employing network address resolving in strace is risky because of potentially huge delays it may cause. By mentioning "lsof" I rather meant "lsof -n". The exact output format may vary, but the general idea of strace decoding is to mimic C syntax. From this PoV, path names should always be enclosed in double quotes. Unfortunately, in case of -y output this rule hasn't been enforced, so you cannot distinguish a socket with inode 1234567 with a file named "socket:[1234567]". -- ldv
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