| /* getdomainname emulation for systems that doesn't have it. |
| |
| Copyright (C) 2003, 2006, 2008, 2010-2020 Free Software Foundation, Inc. |
| |
| This program is free software: you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <https://www.gnu.org/licenses/>. */ |
| |
| /* Written by Simon Josefsson. */ |
| |
| #include <config.h> |
| |
| /* Specification. */ |
| #include <unistd.h> |
| |
| #include <limits.h> |
| #include <string.h> |
| #include <errno.h> |
| |
| #if HAVE_SYSINFO && HAVE_SYS_SYSTEMINFO_H /* IRIX, OSF/1, Solaris */ |
| # include <sys/systeminfo.h> |
| #endif |
| |
| /* Return the NIS domain name of the machine. |
| WARNING! The NIS domain name is unrelated to the fully qualified host name |
| of the machine. It is also unrelated to email addresses. |
| WARNING! The NIS domain name is usually the empty string or "(none)" when |
| not using NIS. |
| |
| Put up to LEN bytes of the NIS domain name into NAME. |
| Null terminate it if the name is shorter than LEN. |
| If the NIS domain name is longer than LEN, set errno = EINVAL and return -1. |
| Return 0 if successful, otherwise set errno and return -1. */ |
| int |
| getdomainname (char *name, size_t len) |
| #undef getdomainname |
| { |
| #if HAVE_GETDOMAINNAME /* Mac OS X, FreeBSD, AIX, IRIX, OSF/1 */ |
| extern int getdomainname (char *, int); |
| |
| if (len > INT_MAX) |
| len = INT_MAX; |
| return getdomainname (name, (int) len); |
| #elif HAVE_SYSINFO && HAVE_SYS_SYSTEMINFO_H && defined SI_SRPC_DOMAIN |
| /* Solaris */ |
| int ret; |
| |
| /* The third argument is a 'long', but the return value must fit in an |
| 'int', therefore it's better to avoid arguments > INT_MAX. */ |
| ret = sysinfo (SI_SRPC_DOMAIN, name, len > INT_MAX ? INT_MAX : len); |
| if (ret < 0) |
| /* errno is set here. */ |
| return -1; |
| if (ret > len) |
| { |
| errno = EINVAL; |
| return -1; |
| } |
| return 0; |
| #else /* HP-UX, Cygwin, mingw */ |
| const char *result = ""; /* Hardcode your domain name if you want. */ |
| size_t result_len = strlen (result); |
| |
| if (result_len > len) |
| { |
| errno = EINVAL; |
| return -1; |
| } |
| memcpy (name, result, result_len); |
| if (result_len < len) |
| name[result_len] = '\0'; |
| return 0; |
| #endif |
| } |