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annotate tests/test-freopen.c @ 40231:9b3c79fdfe0b

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strtod: fix clash with strtold Problem reported for RHEL 5 by Jesse Caldwell (Bug#34817). * lib/strtod.c (compute_minus_zero, minus_zero): Simplify by remving the macro / external variable, and having just a function. User changed. This avoids the need for an external variable that might clash.
author Paul Eggert <eggert@cs.ucla.edu>
date Mon, 11 Mar 2019 16:40:29 -0700
parents b06060465f09
children
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1 /* Test of opening a file stream.
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2 Copyright (C) 2007-2019 Free Software Foundation, Inc.
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3
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4 This program is free software: you can redistribute it and/or modify
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5 it under the terms of the GNU General Public License as published by
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6 the Free Software Foundation; either version 3 of the License, or
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7 (at your option) any later version.
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8
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9 This program is distributed in the hope that it will be useful,
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10 but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 GNU General Public License for more details.
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13
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14 You should have received a copy of the GNU General Public License
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15 along with this program. If not, see <https://www.gnu.org/licenses/>. */
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16
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17 /* Written by Bruno Haible <bruno@clisp.org>, 2007. */
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18
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19 #include <config.h>
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20
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21 #include <stdio.h>
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22
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23 #include "signature.h"
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24 SIGNATURE_CHECK (freopen, FILE *, (char const *, char const *, FILE *));
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25
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26 #include <errno.h>
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27 #include <unistd.h>
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28
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29 #include "macros.h"
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30
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31 int
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32 main ()
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33 {
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34 const char *filename = "test-freopen.txt";
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35
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36 close (STDIN_FILENO);
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37 ASSERT (freopen ("/dev/null", "r", stdin) != NULL);
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38 ASSERT (getchar () == EOF);
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39 ASSERT (!ferror (stdin));
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40 ASSERT (feof (stdin));
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41
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42 #if 0 /* freopen (NULL, ...) is unsupported on most platforms. */
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43 /* Test that freopen() sets errno if someone else closes the stream
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44 fd behind the back of stdio. */
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45 {
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46 FILE *fp = fopen (filename, "w+");
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47 ASSERT (fp != NULL);
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48 ASSERT (close (fileno (fp)) == 0);
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49 errno = 0;
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50 ASSERT (freopen (NULL, "r", fp) == NULL);
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51 perror("freopen");
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52 ASSERT (errno == EBADF);
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53 fclose (fp);
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54 }
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55
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56 /* Test that freopen() sets errno if the stream was constructed with
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57 an invalid file descriptor. */
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58 {
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59 FILE *fp = fdopen (-1, "w+");
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60 if (fp != NULL)
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61 {
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62 errno = 0;
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63 ASSERT (freopen (NULL, "r", fp) == NULL);
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64 ASSERT (errno == EBADF);
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65 fclose (fp);
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66 }
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67 }
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68 {
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69 FILE *fp;
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70 close (99);
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71 fp = fdopen (99, "w+");
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72 if (fp != NULL)
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73 {
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74 errno = 0;
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75 ASSERT (freopen (NULL, "r", fp) == NULL);
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76 ASSERT (errno == EBADF);
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77 fclose (fp);
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78 }
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79 }
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80 #endif
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81
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82 /* Clean up. */
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83 unlink (filename);
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84
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85 return 0;
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86 }