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annotate lib/getdomainname.c @ 10661:65c9436dc0d3

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Move the getdomainname() declaration to <unistd.h>.
author Bruno Haible <bruno@clisp.org>
date Sun, 19 Oct 2008 03:36:00 +0200
parents bbbbbf4cd1c5
children e8d2c6fc33ad
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1 /* getdomainname emulation for systems that doesn't have it.
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2
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3 Copyright (C) 2003, 2006, 2008 Free Software Foundation, Inc.
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4
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5 This program is free software: you can redistribute it and/or modify
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6 it under the terms of the GNU General Public License as published by
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7 the Free Software Foundation; either version 3 of the License, or
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8 (at your option) any later version.
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9
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10 This program is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 GNU General Public License for more details.
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14
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15 You should have received a copy of the GNU General Public License
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16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
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17
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18 /* Written by Simon Josefsson. */
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19
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20 #include <config.h>
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21
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22 /* Specification. */
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23 #include <unistd.h>
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24
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25 #include <string.h>
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26 #include <errno.h>
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27
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28 /* Return the NIS domain name of the machine.
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29 WARNING! The NIS domain name is unrelated to the fully qualified host name
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30 of the machine. It is also unrelated to email addresses.
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31 WARNING! The NIS domain name is usually the empty string or "(none)" when
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32 not using NIS.
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33
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34 Put up to LEN bytes of the NIS domain name into NAME.
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35 Null terminate it if the name is shorter than LEN.
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36 If the NIS domain name is longer than LEN, set errno = EINVAL and return -1.
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37 Return 0 if successful, otherwise set errno and return -1. */
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38 int
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39 getdomainname (char *name, size_t len)
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40 {
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41 const char *result = ""; /* Hardcode your domain name if you want. */
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42 size_t result_len = strlen (result);
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43
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44 if (result_len > len)
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45 {
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46 errno = EINVAL;
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47 return -1;
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48 }
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49 memcpy (name, result, result_len);
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50 if (result_len < len)
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51 name[result_len] = '\0';
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52 return 0;
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53 }