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60 lines
1.4 KiB
C
60 lines
1.4 KiB
C
/* Regression test for reported old bug that errno is clobbered
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by the first successful output to a stream on an unseekable object.
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Copyright (C) 1995-2020 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <stdio.h>
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#include <unistd.h>
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int
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main (void)
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{
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int fd[2];
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FILE *f;
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/* Get a stream that cannot seek. */
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if (pipe (fd))
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{
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perror ("pipe");
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return 1;
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}
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f = fdopen (fd[1], "w");
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if (f == NULL)
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{
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perror ("fdopen");
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return 1;
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}
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errno = 0;
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if (fputs ("fnord", f) == EOF)
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{
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perror ("fputs");
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return 1;
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}
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if (errno)
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{
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perror ("errno gratuitously set -- TEST FAILED");
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return 1;
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}
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puts ("Test succeeded.");
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return 0;
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}
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