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108 lines
2.3 KiB
C
108 lines
2.3 KiB
C
/* Test of fbufmode() function.
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Copyright (C) 2007-2017 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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/* Written by Bruno Haible <bruno@clisp.org>, 2007. */
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#include <config.h>
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#include "fbufmode.h"
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#include <stdio.h>
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#include "macros.h"
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#define TESTFILE "t-fbufmode.tmp"
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/* ISO C99 disallows more than one setvbuf call on a given stream,
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and HP-UX 11 and musl libc indeed don't support such use of setvbuf.
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Therefore allocate a new stream for each possible mode value. */
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static int
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test_mode (int mode)
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{
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FILE *fp;
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char buf[5];
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/* Open it for reading. */
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fp = fopen (TESTFILE, "r");
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switch (mode)
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{
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case _IONBF:
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ASSERT (setvbuf (fp, NULL, _IONBF, 0) == 0);
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ASSERT (fbufmode (fp) == _IONBF);
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break;
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case _IOLBF:
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ASSERT (setvbuf (fp, buf, _IOLBF, 5) == 0);
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/* mingw's setvbuf implements _IOLBF the same way as _IOFBF. */
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ASSERT (fbufmode (fp) == _IOLBF
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|| fbufmode (fp) == _IOFBF);
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break;
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case _IOFBF:
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ASSERT (setvbuf (fp, buf, _IOFBF, 5) == 0);
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ASSERT (fbufmode (fp) == _IOFBF);
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break;
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default:
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break;
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}
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fclose (fp);
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return 0;
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}
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int
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main ()
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{
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int ret;
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/* Create a file with some contents. */
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{
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FILE *fp;
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fp = fopen (TESTFILE, "w");
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if (fp == NULL)
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goto skip;
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if (fwrite ("foobarsh", 1, 8, fp) < 8)
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goto skip;
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if (fclose (fp))
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goto skip;
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}
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ret = test_mode (_IONBF);
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if (ret != 0)
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goto fail;
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ret = test_mode (_IOLBF);
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if (ret != 0)
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goto fail;
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ret = test_mode (_IOFBF);
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if (ret != 0)
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goto fail;
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return 0;
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fail:
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return ret;
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skip:
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fprintf (stderr, "Skipping test: file operations failed.\n");
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return 77;
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}
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