no name resolution in busybox system

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noone Contact options for registered users 's Avatar (by Gravatar) posted on
June 21, 2007, 7:09 pm
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I created an embedded (CF card based) system using a glibc linked version
of busybox.  I do have a /etc/nsswitch.conf file but I cannot get any
name resolution for the entries in /etc/hosts.

Some of my custom programs do gethostbyname() calls and they also fail so the
problem is not busybox specific.

Any clues?


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Jim Jackson Contact options for registered users 's Avatar (by Gravatar) posted on
June 26, 2007, 9:42 pm
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Re: no name resolution in busybox system
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and what is in your /etc/nsswitch.conf file?

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noone Contact options for registered users 's Avatar (by Gravatar) posted on
June 28, 2007, 8:07 pm
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Re: no name resolution in busybox system

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That's not the issue...trust me...

Problem was, that modern glibc breaks up services into several different
libraries.  It is enough of an unforgivable sin to not be able to create
a static binary that uses naming services unless you dynamically link glibc,
but to then have to include additional support libraries besides libc.so...
well, this is what happens when you have a large group of undisciplined
programmers working on something and no draconian authority to force things
in a specific direction.

But I'm getting close to my other rant about how modern linux is becoming
less and less suited for embedded applications...so I'll shut up for now.

-regards

Jim Jackson Contact options for registered users 's Avatar (by Gravatar) posted on
July 2, 2007, 2:46 pm
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Re: no name resolution in busybox system
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Ah that would bite me too. I'd not caught up with that, still using 2.4
era distributions for most of my current dev efforts. Quick logon to a
very recent linux box, and indeed man resolver has the "Link with
-lresolv." advice. wonder why the glibc guys split it out?

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