xref: /titanic_50/usr/src/man/man3c/gethostname.3c (revision b0e753dd6a955fb2f10a0ce17d32bd33172e0400)
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GETHOSTNAME 3C "Feb 7, 2015"
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 machine, as previously set by sethostname(). The namelen argument 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)