diff options
Diffstat (limited to 'REORG.TODO/stdio-common/errnobug.c')
-rw-r--r-- | REORG.TODO/stdio-common/errnobug.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/REORG.TODO/stdio-common/errnobug.c b/REORG.TODO/stdio-common/errnobug.c new file mode 100644 index 0000000000..9b09a3849e --- /dev/null +++ b/REORG.TODO/stdio-common/errnobug.c @@ -0,0 +1,59 @@ +/* Regression test for reported old bug that errno is clobbered + by the first successful output to a stream on an unseekable object. + Copyright (C) 1995-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <errno.h> +#include <stdio.h> +#include <unistd.h> + +int +main (void) +{ + int fd[2]; + FILE *f; + + /* Get a stream that cannot seek. */ + + if (pipe (fd)) + { + perror ("pipe"); + return 1; + } + f = fdopen (fd[1], "w"); + if (f == NULL) + { + perror ("fdopen"); + return 1; + } + + errno = 0; + if (fputs ("fnord", f) == EOF) + { + perror ("fputs"); + return 1; + } + + if (errno) + { + perror ("errno gratuitously set -- TEST FAILED"); + return 1; + } + + puts ("Test succeeded."); + return 0; +} |