Mercurial > gnulib
view tests/test-fseeko4.c @ 40246:c34f677e6117 default tip master
_Noreturn: GCC 4.7 does not support [[noreturn]] in C++11 mode
* lib/_Noreturn.h, m4/gnulib-common.m4: Don't use [[noreturn]] before
GCC 4.8.
author | Akim Demaille <akim.demaille@gmail.com> |
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date | Sun, 17 Mar 2019 19:27:20 +0100 |
parents | b06060465f09 |
children |
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/* Test of fseeko() function. Copyright (C) 2011-2019 Free Software Foundation, Inc. This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>. */ #include <config.h> #include <stdio.h> #include <errno.h> #include <unistd.h> #include "macros.h" int main (int argc, char **argv) { const char *filename = argv[1]; /* Test that fseeko() sets errno if someone else closes the stream fd behind the back of stdio. */ { FILE *fp = fopen (filename, "r"); ASSERT (fp != NULL); setvbuf (fp, NULL, _IONBF, 0); ASSERT (ftell (fp) == 0); ASSERT (fseeko (fp, 0, SEEK_END) == 0); ASSERT (ftell (fp) > 0); ASSERT (close (fileno (fp)) == 0); errno = 0; ASSERT (fseeko (fp, 0, SEEK_SET) == -1); ASSERT (errno == EBADF); fclose (fp); } /* Test that fseeko() sets errno if the stream was constructed with an invalid file descriptor. */ { FILE *fp = fdopen (-1, "w"); if (fp != NULL) { errno = 0; ASSERT (fseeko (fp, 0, SEEK_END) == -1); ASSERT (errno == EBADF); fclose (fp); } } { FILE *fp; close (99); fp = fdopen (99, "w"); if (fp != NULL) { errno = 0; ASSERT (fseeko (fp, 0, SEEK_END) == -1); ASSERT (errno == EBADF); fclose (fp); } } return 0; }