gethostname(3) [netbsd man page]

GETHOSTNAME(3)						   BSD 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 processor, 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.

BSD
								 October 14, 2005							       BSD

GETHOSTNAME(3)						   BSD 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, int namelen);

DESCRIPTION

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

     The sethostname() function 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.

     Host names are limited to {HOST_NAME_MAX} characters, not including the trailing null, currently 255.

RETURN VALUES

     Upon successful completion, the value 0 is returned; otherwise the value -1 is returned and the global variable errno is set to indicate the
     error.

ERRORS

     The following errors may be returned by these calls:

     [EFAULT]		The name or namelen argument gave an invalid address.

     [ENAMETOOLONG]	The current host name is longer than namelen.  (For gethostname() only.)

     [EPERM]		The caller tried to set the host name and was not the super-user.

SEE ALSO

     sysconf(3), sysctl(3)

STANDARDS

     The gethostname() function conforms to IEEE Std 1003.1-2001 (``POSIX.1'').  Callers should be aware that {HOST_NAME_MAX} may be variable or
     infinite, but is guaranteed to be no less than {_POSIX_HOST_NAME_MAX}.  On older systems, this limit was defined in the non-standard header
     <sys/param.h> as MAXHOSTNAMELEN, and counted the terminating null.  The sethostname() function and the error returns for gethostname() are
     not standardized.

HISTORY

     The gethostname() function appeared in 4.2BSD.  The namelen argument to gethostname() was changed to size_t in FreeBSD 5.2 for alignment with
     IEEE Std 1003.1-2001 (``POSIX.1'').

BSD
								  August 18, 2003							       BSD