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gethostname(2) [ultrix man page]

gethostname(2)							System Calls Manual						    gethostname(2)

Name
       gethostname, sethostname - get or set the name of the current host

Syntax
       gethostname(name, namelen)
       char *name;
       int namelen;

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

Description
       The  system call returns the standard host name for the current processor, as previously set by The namelen parameter specifies the size of
       the name array.	The returned name is null-terminated unless insufficient space is provided.

       The system call 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.

Return Values
	0   If the call succeeds, it returns a value of zero.

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

Restrictions
       Host  names  are  limited to 31 characters and may contain only lower case ASCII characters a to z, numbers 0 to 9, dashes (-), underscores
       (_), and periods (.).

Diagnostics
       The system call fails under the following condition:

       [EFAULT]       The name parameter points outside the process's allocated address space.

       The system call fails under the following conditions:

       [EPERM]	      The caller is not the superuser.

       [EINVAL]       The name or namelen parameter is an invalid address.

See Also
       hostname(1), gethostid(2)

																    gethostname(2)

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)
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