Mercurial > gnulib
view tests/test-fflush2.c @ 40198:5a34193cbc07
long-options: add parse_gnu_standard_options_only
Discussed in https://bugs.gnu.org/33468 .
* lib/long-options.c (parse_long_options): Use EXIT_SUCCESS instead
of 0.
(parse_gnu_standard_options_only): Add function to
process the GNU default options --help and --version and fail for any other
unknown long or short option. See
https://gnu.org/prep/standards/html_node/Command_002dLine-Interfaces.html .
* lib/long-options.h (parse_gnu_standard_options_only): Declare it.
* modules/long-options (depends-on): Add stdbool, exitfail.
* top/maint.mk (sc_prohibit_long_options_without_use): Update
syntax-check rule, add new function name.
author | Bernhard Voelker <mail@bernhard-voelker.de> |
---|---|
date | Thu, 29 Nov 2018 09:06:26 +0100 |
parents | b06060465f09 |
children |
line wrap: on
line source
/* Test of POSIX compatible fflush() function. Copyright (C) 2008-2019 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 "binary-io.h" #include "macros.h" int main (int argc, char **argv) { int c; /* Avoid the well-known bugs of fflush() on streams in O_TEXT mode on native Windows platforms. */ set_binary_mode (0, O_BINARY); if (argc > 1) switch (argv[1][0]) { case '1': /* Check fflush after a backup ungetc() call. This is case 1a in terms of <https://lists.gnu.org/r/bug-gnulib/2008-03/msg00131.html>, according to the Austin Group's resolution on 2009-01-08. */ c = fgetc (stdin); ASSERT (c == '#'); c = fgetc (stdin); ASSERT (c == '!'); /* Here the file-position indicator must be 2. */ c = ungetc ('!', stdin); ASSERT (c == '!'); fflush (stdin); /* Here the file-position indicator must be 1. */ c = fgetc (stdin); ASSERT (c == '!'); c = fgetc (stdin); ASSERT (c == '/'); return 0; case '2': /* Check fflush after a non-backup ungetc() call. This is case 2a in terms of <https://lists.gnu.org/r/bug-gnulib/2008-03/msg00131.html>, according to the Austin Group's resolution on 2009-01-08. */ /* Check that fflush after a non-backup ungetc() call discards the ungetc buffer. This is mandated by POSIX <http://www.opengroup.org/susv3/functions/ungetc.html>: "The value of the file-position indicator for the stream after reading or discarding all pushed-back bytes shall be the same as it was before the bytes were pushed back." <http://www.opengroup.org/austin/aardvark/latest/xshbug3.txt> "[After fflush(),] the file offset of the underlying open file description shall be set to the file position of the stream, and any characters pushed back onto the stream by ungetc() or ungetwc() that have not subsequently been read from the stream shall be discarded." */ c = fgetc (stdin); ASSERT (c == '#'); c = fgetc (stdin); ASSERT (c == '!'); /* Here the file-position indicator must be 2. */ c = ungetc ('@', stdin); ASSERT (c == '@'); fflush (stdin); /* Here the file-position indicator must be 1. */ c = fgetc (stdin); ASSERT (c == '!'); c = fgetc (stdin); ASSERT (c == '/'); return 0; } return 1; }