[Bug nscd/11928] New: nscd does not account for 'multi on' in /etc/host.conf when ai-resolving hosts

[Bug nscd/11928] New: nscd does not account for 'multi on' in /etc/host.conf when ai-resolving hosts

[pasky at suse dot cz]

When nscd is handling getaddrinfo() resolution requests, it fails to properly
initialize its resolver options state and ignores /etc/host.conf. An easy way to
reproduce this is by putting 'multi on' in /etc/host.conf and

cat >>/etc/host.conf <<EOT
1.2.3.4 test
1.2.3.5 test
EOT

Then, with nscd stopped:
$ getent ahosts test
1.2.3.4         STREAM test
1.2.3.4         DGRAM  
1.2.3.4         RAW    
1.2.3.5         STREAM 
1.2.3.5         DGRAM  
1.2.3.5         RAW    

However, with nscd running:
$ getent ahosts test
1.2.3.4         STREAM test
1.2.3.4         DGRAM  
1.2.3.4         RAW

-- 
           Summary: nscd does not account for 'multi on' in /etc/host.conf
                    when ai-resolving hosts
           Product: glibc
           Version: 2.12
            Status: NEW
          Severity: normal
          Priority: P2
         Component: nscd
        AssignedTo: drepper at redhat dot com
        ReportedBy: pasky at suse dot cz
                CC: glibc-bugs at sources dot redhat dot com


http://sourceware.org/bugzilla/show_bug.cgi?id=11928

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[Bug nscd/11928] nscd does not account for 'multi on' in /etc/host.conf when ai-resolving hosts

[pasky at suse dot cz]

------- Additional Comments From pasky at suse dot cz  2010-08-19 20:23 -------
Created an attachment (id=4940)
 --> (http://sourceware.org/bugzilla/attachment.cgi?id=4940&action=view)
proposed patch

This patch makes sure _res_hconf is initialized before resolving is being done.
However, this would not be enough since nscd has its own _res_hconf due to
nscd/res_hconf.c; _res_hconf_init() would work on different _res_hconf instance
than the NSS routines. We just need to make sure nscd and glibc share the same
_res_hconf instance - this should not be a problem since users should run
matching versions of glibc and nscd anyway.

-- 


http://sourceware.org/bugzilla/show_bug.cgi?id=11928

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[Bug nscd/11928] nscd does not account for 'multi on' in /etc/host.conf when ai-resolving hosts

[pasky at suse dot cz]

------- Additional Comments From pasky at suse dot cz  2010-08-22 14:42 -------
*** Bug 11536 has been marked as a duplicate of this bug. ***

-- 


http://sourceware.org/bugzilla/show_bug.cgi?id=11928

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