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OpenSolaris 2009.06 - man page for gethostid (opensolaris section 3c)

gethostid(3C)						   Standard C Library Functions 					     gethostid(3C)

gethostid - get an identifier for the current host
#include <unistd.h> long gethostid(void);
The gethostid() function returns the 32-bit identifier for the current host. If the hardware capability exists, this identifier is taken from platform-dependent stable storage; otherwise it is a randomly generated number. It is not guaranteed to be unique. If the calling thread's process is executing within a non-global zone that emulates a host identifier, then the zone's emulated 32-bit host identifier is returned.
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Committed | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ |Standard |See standards(5). | +-----------------------------+-----------------------------+
hostid(1), sysinfo(2), attributes(5), standards(5), zones(5) SunOS 5.11 29 Jan 2009 gethostid(3C)