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Full Discussion: getservbyname returning NULL
Top Forums UNIX for Advanced & Expert Users getservbyname returning NULL Post 302552790 by satish@123 on Monday 5th of September 2011 03:56:43 PM
Old 09-05-2011
getservbyname returning NULL

OS : Solaris 10

When I try to get the "echo" service port, getservbyname is returning null.

I checked - /etc/services having an entry for echo -

echo 7/tcp (But still getservbyname returning null)

Any other config required to consider?
 

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services(4)						     Kernel Interfaces Manual						       services(4)

NAME
services - Defines the sockets and protocols used for Internet services SYNOPSIS
/etc/services DESCRIPTION
The /etc/services file associates Internet service names and aliases with the port number and protocol used by the service. Each service is listed in this file on a single line of the form: ServiceName PortNumber/ProtocolName Aliases The fields contain the following information: The official Internet service name. The socket port number used for the service and the transport protocol used for the service. A list of unofficial service names. Items on a line are separated by spaces or tabs. Comments begin with a # (number sign) and continue to the end of the line. EXAMPLES
Entries in the /etc/services file for the inetd internal services might look like this: echo 7/tcp echo 7/udp discard 9/tcp sink null discard 9/udp sink null daytime 13/tcp daytime 13/udp chargen 19/tcp ttytst source chargen 19/tcp ttytst source ftp 21/tcp time 37/tcp timeserver time 37/udp timeserver RELATED INFORMATION
Functions: endservent(3), getservbyname(3), getservbyport(3), getservent(3), setservent(3) The RFC923 specification. delim off services(4)
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