gethostname(3) [mojave 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, 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 in length to {sysconf(_SC_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 {sysconf(_SC_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-stan-
     dard 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

Check Out this Related Man Page

gethostname(3C) 					   Standard C Library Functions 					   gethostname(3C)

NAME

       gethostname, sethostname - get or set name of current host

SYNOPSIS

       #include <unistd.h>

       int gethostname(char *name, int namelen);

       int sethostname(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 array pointed to by name. 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 superuser
       and is normally used only when the system is bootstrapped.

       Host names are limited to MAXHOSTNAMELEN characters, currently 256, defined in the <netdb.h> header.

RETURN VALUES

       Upon successful completion, gethostname() and sethostname() return 0. Otherwise, they return -1 and set errno to indicate the error.

ERRORS

       The gethostname() and sethostname() functions will fail if:

       EFAULT	 The name or namelen argument gave an invalid address.

       The sethostname() function will fail if:

       EPERM	The {PRIV_SYS_ADMIN} privilege was not asserted in the effective set of the calling process.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       sysinfo(2), uname(2), gethostid(3C), attributes(5), standards(5)

SunOS 5.11							    22 Mar 2004 						   gethostname(3C)

Linux and UNIX Man Pages

gethostname(3) [mojave man page]

Check Out this Related Man Page