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Hi, |
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|
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First, sorry if this is not the correct list. |
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|
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Second, the background story... |
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I was tracking a problem that I have always ignored when updating python |
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on my Gentoo laptop. The problem is that emerge-ing python always fail |
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when FEATURES="test" is on. Usually, I would just turn FEATURES="test" |
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off when updating python, but today I set up to search for the source of |
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the failure. |
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|
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After downloading the latest svn version from python and a few hours of |
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debugging python's test suite; I isolated the problem to this: |
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|
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lieryan@lieryan ~/Desktop/pythontrunk/trunk $ ./python |
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Python 2.7a0 (trunk:75376M, Oct 12 2009, 22:17:57) |
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[GCC 4.3.2] on linux2 |
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Type "help", "copyright", "credits" or "license" for more information. |
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>>> import socket |
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>>> socket.gethostname() |
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'lieryan' |
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>>> socket.gethostbyname(socket.gethostname()) |
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Traceback (most recent call last): |
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File "<stdin>", line 1, in <module> |
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socket.gaierror: [Errno -2] Name or service not known |
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>>> socket.gethostbyname('localhost') |
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'127.0.0.1' |
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|
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From that, I see that socket.gethostname() returned 'lieryan' which is |
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my user name; instead of 'localhost' which is the correct local |
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machine's name. |
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|
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Tracking the interpreter's source code, it seems that |
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socket.gethostname() simply returns what the libc's gethostname() |
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returns; which "man gethostname" says "The GNU C Library ... implements |
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gethostname() as a library function that calls uname(2)..." |
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|
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So running "uname -a": |
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lieryan@lieryan ~/Desktop/pythontrunk/trunk $ uname -a |
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Linux lieryan 2.6.28-gentoo-r5-LR-15 #14 SMP Tue Oct 6 18:12:23 EST 2009 |
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x86_64 AMD Turion(tm) 64 X2 AuthenticAMD GNU/Linux |
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|
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So clearly this is an environmental issue. |
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|
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============================= |
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|
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|
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It appears that gethostname() returns 'lieryan'; which is my user name |
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instead of 'localhost' which, I believe, should be the correct hostname |
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for the machine I'm currently in. |
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|
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Now I know where the source of the problem is; but I don't know how to |
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fix it. |
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|
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Anyone got any idea what I should do to change the return value of |
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gethostname()? |
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|
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Googling gethostname() only returned various versions of "gethostname()" |
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man page. The man pages also mentioned about another libc's function |
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sethostname() but this system call is not available in python and even |
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if I write a C script to call sethostname() with the correct value; I |
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doubt this will really fix the real root cause of the problem. |
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|
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Anyone got any lead? |
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|
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|
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Extra information: |
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|
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lieryan@lieryan ~/Desktop/pythontrunk/trunk $ /lib/libc.so.6 |
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GNU C Library stable release version 2.9, by Roland McGrath et al. |
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Copyright (C) 2008 Free Software Foundation, Inc. |
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This is free software; see the source for copying conditions. |
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There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A |
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PARTICULAR PURPOSE. |
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Compiled by GNU CC version 4.3.2. |
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Compiled on a Linux >>2.6.28-gentoo-r5-LR-12<< system on 2009-07-05. |
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Available extensions: |
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C stubs add-on version 2.1.2 |
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crypt add-on version 2.1 by Michael Glad and others |
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Gentoo snapshot 20081201 |
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Gentoo patchset 5 |
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GNU Libidn by Simon Josefsson |
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Native POSIX Threads Library by Ulrich Drepper et al |
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Support for some architectures added on, not maintained in glibc core. |
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BIND-8.2.3-T5B |
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For bug reporting instructions, please see: |
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<http://www.gnu.org/software/libc/bugs.html>. |
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