sethostname(3) - NetBSD Manual Pages

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GETHOSTNAME(3)          NetBSD 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 nor-
     mally 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 loca-
     tion 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 10.1                    September 2, 2015                   NetBSD 10.1