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GETHOSTNAME(3)             Library Functions Manual             GETHOSTNAME(3)

NAME
     gethostname, sethostname - get/set name of current host

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <unistd.h>

     int
     gethostname(char *name, size_t namelen);

     int
     sethostname(const char *name, size_t namelen);

DESCRIPTION
     gethostname() returns the standard host name for the current machine, as
     previously set by sethostname().  The parameter namelen specifies the
     size of the name array.  The returned name is null-terminated unless
     insufficient space is provided.

     sethostname() sets the name of the host machine to be name, which has
     length namelen.  This call is restricted to the super-user and is
     normally used only when the system is bootstrapped.

RETURN VALUES
     If the call succeeds a value of 0 is returned.  If the call fails, a
     value of -1 is returned and an error code is placed in the global
     location errno.

ERRORS
     If the gethostname() or sethostname() functions fail, they will set errno
     for any of the errors specified for the routine sysctl(3).

SEE ALSO
     gethostid(3), sysctl(3), sysctl(8)

STANDARDS
     The gethostname() function conforms to X/Open Portability Guide Issue 4,
     Version 2 ("XPG4.2").

HISTORY
     The gethostname function call appeared in 4.2BSD.

BUGS
     Host names are limited to MAXHOSTNAMELEN (from <sys/param.h>) characters
     including null-termination, currently 256.

NetBSD 10.99                   September 2, 2015                  NetBSD 10.99