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annotate tests/test-gethostname.c @ 15681:c21e706c88b2

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Tests for module 'shutdown'. * modules/shutdown-tests: New file. * tests/test-shutdown.c: New file.
author Bruno Haible <bruno@clisp.org>
date Tue, 20 Sep 2011 21:38:04 +0200
parents 97fc9a21a8fb
children 8250f2777afc
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1 /*
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2 * Copyright (C) 2008-2011 Free Software Foundation, Inc.
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3 * Written by Simon Josefsson.
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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 #include <config.h>
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19
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20 /* Get gethostname() declaration. */
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21 #include <unistd.h>
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22
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23 #include "signature.h"
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24 SIGNATURE_CHECK (gethostname, int, (char *, size_t));
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25
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26 /* Get HOST_NAME_MAX definition. */
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27 #include <limits.h>
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28
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29 #include <stdio.h>
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30 #include <string.h>
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31 #include <errno.h>
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32
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33 #define NOHOSTNAME "magic-gnulib-test-string"
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34
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35 int
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36 main (int argc, char *argv[] _GL_UNUSED)
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37 {
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38 char buf[HOST_NAME_MAX];
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39 int rc;
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40
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41 if (strlen (NOHOSTNAME) >= HOST_NAME_MAX)
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42 {
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43 printf ("HOST_NAME_MAX impossibly small?! %d\n", HOST_NAME_MAX);
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44 return 2;
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45 }
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46
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47 strcpy (buf, NOHOSTNAME);
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48
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49 rc = gethostname (buf, sizeof (buf));
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50
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51 if (rc != 0)
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52 {
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53 printf ("gethostname failed, rc %d errno %d\n", rc, errno);
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54 return 1;
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55 }
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56
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57 if (strcmp (buf, NOHOSTNAME) == 0)
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58 {
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59 printf ("gethostname left buffer untouched.\n");
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60 return 1;
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61 }
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62
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63 if (argc > 1)
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64 printf ("hostname: %s\n", buf);
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65
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66 return 0;
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67 }