/usr/lib/x86_64-linux-gnu/libnss_dns_pic.map is in libc6-pic 2.19-0ubuntu6.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 | GLIBC_PRIVATE {
global:
_nss_dns_gethostbyaddr2_r;
_nss_dns_gethostbyaddr_r; _nss_dns_gethostbyname2_r;
_nss_dns_gethostbyname3_r;
_nss_dns_gethostbyname4_r;
_nss_dns_gethostbyname_r; _nss_dns_getnetbyaddr_r;
_nss_dns_getnetbyname_r; _nss_dns_getcanonname_r;
local:
*;
};
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