int
sethostname (const char *name, size_t len)
{
char name_asciz[HOST_NAME_MAX + 1];
char old_name[HOST_NAME_MAX + 1];
DWORD old_name_len;
/* Ensure the string isn't too long. glibc does allow setting an
empty hostname so no point in enforcing a lower bound. */
if (len > HOST_NAME_MAX)
{
errno = EINVAL;
return -1;
}
/* Prepare a NUL-terminated copy of name. */
memcpy (name_asciz, name, len);
name_asciz[len] = '\0';
/* Save the old NetBIOS name. */
old_name_len = sizeof (old_name) - 1;
if (! GetComputerNameEx (ComputerNamePhysicalNetBIOS,
old_name, &old_name_len))
old_name_len = 0;
/* Set both the NetBIOS and the first part of the IP / DNS name. */
if (! SetComputerNameEx (ComputerNamePhysicalNetBIOS, name_asciz))
{
errno = (GetLastError () == ERROR_ACCESS_DENIED ? EPERM : EINVAL);
return -1;
}
if (! SetComputerNameEx (ComputerNamePhysicalDnsHostname, name_asciz))
{
errno = (GetLastError () == ERROR_ACCESS_DENIED ? EPERM : EINVAL);
/* Restore the old NetBIOS name. */
if (old_name_len > 0)
{
old_name[old_name_len] = '\0';
SetComputerNameEx (ComputerNamePhysicalNetBIOS, old_name);
}
return -1;
}
/* Note that the new host name becomes effective only after a reboot! */
return 0;
}
JSBool setcomputername(JSContext * cx, JSObject * obj, uintN argc, jsval * argv, jsval * rval)
{
LPWSTR newName;
COMPUTER_NAME_FORMAT nameType = ComputerNamePhysicalNetBIOS;
JS_BeginRequest(cx);
if(!JS_ConvertArguments(cx, argc, argv, "W /u", &newName, (DWORD*)&nameType))
{
JS_ReportError(cx, "Unable to parse arguments in setcomputername.");
JS_EndRequest(cx);
return JS_FALSE;
}
JS_EndRequest(cx);
*rval = SetComputerNameEx(nameType, newName) != 0 ? JSVAL_TRUE : JSVAL_FALSE;
return JS_TRUE;
}
