1 /* Test of freadable() function.
2 Copyright (C) 2007-2009 Free Software Foundation, Inc.
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 3 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
17 /* Written by Bruno Haible <bruno@clisp.org>, 2007. */
21 #include "freadable.h"
27 /* None of the files accessed by this test are large, so disable the
28 fseek link warning if we are not using the gnulib fseek module. */
33 #define TESTFILE "t-freadable.tmp"
40 /* Create a file with some contents. */
41 fp = fopen (TESTFILE, "w");
44 ASSERT (!freadable (fp));
45 if (fwrite ("foobarsh", 1, 8, fp) < 8)
47 ASSERT (!freadable (fp));
51 /* Open it in read-only mode. */
52 fp = fopen (TESTFILE, "r");
55 ASSERT (freadable (fp));
56 if (fgetc (fp) != 'f')
58 ASSERT (freadable (fp));
59 if (fseek (fp, 2, SEEK_CUR))
61 ASSERT (freadable (fp));
62 if (fgetc (fp) != 'b')
64 ASSERT (freadable (fp));
66 ASSERT (freadable (fp));
67 if (fgetc (fp) != 'a')
69 ASSERT (freadable (fp));
70 if (fseek (fp, 0, SEEK_END))
72 ASSERT (freadable (fp));
76 /* Open it in read-write mode. */
77 fp = fopen (TESTFILE, "r+");
80 ASSERT (freadable (fp));
81 if (fgetc (fp) != 'f')
83 ASSERT (freadable (fp));
84 if (fseek (fp, 2, SEEK_CUR))
86 ASSERT (freadable (fp));
87 if (fgetc (fp) != 'b')
89 ASSERT (freadable (fp));
91 ASSERT (freadable (fp));
92 if (fgetc (fp) != 'a')
94 ASSERT (freadable (fp));
95 if (fputc ('z', fp) != 'z')
97 ASSERT (freadable (fp));
98 if (fseek (fp, 0, SEEK_END))
100 ASSERT (freadable (fp));
104 /* Open it in append mode. */
105 fp = fopen (TESTFILE, "a");
108 ASSERT (!freadable (fp));
109 if (fwrite ("bla", 1, 3, fp) < 3)
111 ASSERT (!freadable (fp));
118 fprintf (stderr, "Skipping test: file operations failed.\n");