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Name

gethostname, sethostname - get/set name of current host

Synopsis

int gethostname(char *name, int namelen);

int sethostname(char *name, int 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 array pointed to by name. 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 privileged 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, then a value of -1 is returned and an error code is placed in the global location errno.

Errors

The following error may be returned by these calls:
EFAULT
The name or namelen parameter gave an invalid address.
EPERM
The caller was not the privileged user. Note: this error only applies to sethostname().

See Also

uname(2) , sysinfo(2) , gethostid(3C)

Notes

Host names are limited to MAXHOSTNAMELEN characters, currently 256. (See the <sys/param.h> header.)

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