| /* Test of fwrite() function. |
| Copyright (C) 2011-2020 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, 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 "signature.h" |
| SIGNATURE_CHECK (fwrite, size_t, (const void *, size_t, size_t, FILE *)); |
| |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <unistd.h> |
| |
| #if HAVE_MSVC_INVALID_PARAMETER_HANDLER |
| # include "msvc-inval.h" |
| #endif |
| |
| #include "macros.h" |
| |
| int |
| main (int argc, char **argv) |
| { |
| const char *filename = "test-fwrite.txt"; |
| |
| /* We don't have an fwrite() function that installs an invalid parameter |
| handler so far. So install that handler here, explicitly. */ |
| #if HAVE_MSVC_INVALID_PARAMETER_HANDLER \ |
| && MSVC_INVALID_PARAMETER_HANDLING == DEFAULT_HANDLING |
| gl_msvc_inval_ensure_handler (); |
| #endif |
| |
| /* Test that fwrite() on an unbuffered stream sets errno if someone else |
| closes the stream fd behind the back of stdio. */ |
| { |
| FILE *fp = fopen (filename, "w"); |
| char buf[5] = "world"; |
| ASSERT (fp != NULL); |
| setvbuf (fp, NULL, _IONBF, 0); |
| ASSERT (close (fileno (fp)) == 0); |
| errno = 0; |
| ASSERT (fwrite (buf, 1, sizeof (buf), fp) == 0); |
| ASSERT (errno == EBADF); |
| ASSERT (ferror (fp)); |
| fclose (fp); |
| } |
| |
| /* Test that fwrite() on an unbuffered stream sets errno if the stream |
| was constructed with an invalid file descriptor. */ |
| { |
| FILE *fp = fdopen (-1, "w"); |
| if (fp != NULL) |
| { |
| char buf[5] = "world"; |
| setvbuf (fp, NULL, _IONBF, 0); |
| errno = 0; |
| ASSERT (fwrite (buf, 1, sizeof (buf), fp) == 0); |
| ASSERT (errno == EBADF); |
| ASSERT (ferror (fp)); |
| fclose (fp); |
| } |
| } |
| { |
| FILE *fp; |
| close (99); |
| fp = fdopen (99, "w"); |
| if (fp != NULL) |
| { |
| char buf[5] = "world"; |
| setvbuf (fp, NULL, _IONBF, 0); |
| errno = 0; |
| ASSERT (fwrite (buf, 1, sizeof (buf), fp) == 0); |
| ASSERT (errno == EBADF); |
| ASSERT (ferror (fp)); |
| fclose (fp); |
| } |
| } |
| |
| /* Clean up. */ |
| unlink (filename); |
| |
| return 0; |
| } |