strace pdns_server

open("//pdns.pid", O_WRONLY|O_CREAT|O_TRUNC, 0666) = 5
ioctl(5, TIOCGWINSZ, 0x7ffc0e805ee8)    = -1 ENOTTY (Not a tty)
getpid()                                = 7
write(5, "7\n", 2)                      = 2
close(5)                                = 0
wait4(9, 0x7ffc0e806438, WNOHANG, NULL) = 0
nanosleep({1, 0}, Oct 19 16:27:18 Guardian is launching an instance
Oct 19 16:27:18 Reading random entropy from '/dev/urandom'
Oct 19 16:27:18 Loading '/usr/lib/pdns/pdns/libldapbackend.so'
Oct 19 16:27:18 [ldapbackend] This is the ldap backend version 4.0.3 (Apr  3 2017 12:38:37) reporting
Oct 19 16:27:18 This is a guarded instance of pdns
Oct 19 16:27:18 UDP server bound to 0.0.0.0:53
Oct 19 16:27:18 UDPv6 server bound to [::]:53
Oct 19 16:27:18 TCP server bound to 0.0.0.0:53
Oct 19 16:27:18 TCPv6 server bound to [::]:53
Oct 19 16:27:18 PowerDNS Authoritative Server 4.0.3 (C) 2001-2016 PowerDNS.COM BV
Oct 19 16:27:18 Using 64-bits mode. Built using gcc 6.2.1 20160822 on Apr  3 2017 12:39:24 by buildozer@build-3-5-x86_64.
Oct 19 16:27:18 PowerDNS comes with ABSOLUTELY NO WARRANTY. This is free software, and you are welcome to redistribute it according to the terms of the GPL version 2.
Oct 19 16:27:18 Listening for HTTP requests on 0.0.0.0:80
Oct 19 16:27:18 Doing stub resolving, using resolvers: 127.0.0.11
Oct 19 16:27:18 Question got answered by 127.0.0.11
Oct 19 16:27:18 Polled security status of version 4.0.3 at startup, no known issues reported: OK
Oct 19 16:27:18 Creating backend connection for TCP
Oct 19 16:27:18 [LdapBackend] LDAP servers = ldap://ldap/
Oct 19 16:27:18 [LdapBackend] Ldap connection succeeded
Oct 19 16:27:18 About to create 3 backend threads for UDP
Oct 19 16:27:18 [LdapBackend] LDAP servers = ldap://ldap/
Oct 19 16:27:18 [LdapBackend] Ldap connection succeeded
Oct 19 16:27:18 [LdapBackend] LDAP servers = ldap://ldap/
Oct 19 16:27:18 [LdapBackend] Ldap connection succeeded
Oct 19 16:27:18 [LdapBackend] LDAP servers = ldap://ldap/
Oct 19 16:27:18 [LdapBackend] Ldap connection succeeded
Oct 19 16:27:18 Done launching threads, ready to distribute questions
0x7ffc0e8063b0)       = 0
wait4(9, 0x7ffc0e806438, WNOHANG, NULL) = 0
nanosleep({1, 0}, 0x7ffc0e8063b0)       = 0
wait4(9, 0x7ffc0e806438, WNOHANG, NULL) = 0
nanosleep({1, 0}, 0x7ffc0e8063b0)       = 0
wait4(9, 0x7ffc0e806438, WNOHANG, NULL) = 0
nanosleep({1, 0}, 0x7ffc0e8063b0)       = 0
wait4(9, 0x7ffc0e806438, WNOHANG, NULL) = 0
nanosleep({1, 0}, 0x7ffc0e8063b0)       = 0