javahostname

Prints the local hostname as Java would resolve it on Linux.

This program simulates how the local hostname is resolved in the OpenJDK Java 8 runtime, as outlined below.

1. resolve local hostname with gethostname(2)
2. resolve ip address belonging to the hostname you got in step 1 with getaddrinfo(3)
3. resolve canonical hostname for the ip address with getnameinfo(3)

Installation

1. generate build scripts (used autoconf 2.69)

$ autoreconf --install

2. configure and build

$ ./configure
$ make

3. run program

$ src/javahostname

Further reading

man 2 gethostname
man 3 getaddrinfo
man 3 getnameinfo