Mercurial > gnulib
view tests/test-pread.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 the pread function. Copyright (C) 2009-2019 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/>. */ /* Written by Jim Meyering. */ #include <config.h> #include <unistd.h> #include "signature.h" SIGNATURE_CHECK (pread, ssize_t, (int, void *, size_t, off_t)); #include <sys/types.h> #include <fcntl.h> #include <errno.h> #include "macros.h" #define N (sizeof buf - 1) int main (void) { char const *file = "in"; int fd; char buf[] = "0123456789"; off_t pos; ASSERT (file); fd = open (file, O_CREAT | O_WRONLY, 0600); ASSERT (0 <= fd); ASSERT (write (fd, buf, N) == N); ASSERT (close (fd) == 0); fd = open (file, O_RDONLY); ASSERT (0 <= fd); for (pos = 0; pos < 3; pos++) { size_t i; off_t init_pos = lseek (fd, pos, SEEK_SET); ASSERT (init_pos == pos); for (i = 0; i < N; i++) { char byte_buf; ASSERT (pread (fd, &byte_buf, 1, i) == 1); ASSERT (byte_buf == buf[i]); ASSERT (lseek (fd, 0, SEEK_CUR) == init_pos); } } { /* Invalid offset must evoke failure with EINVAL. */ char byte; ASSERT (pread (fd, &byte, 1, (off_t) -1) == -1); ASSERT (errno == EINVAL || errno == EFBIG /* seen on OpenBSD 4.9 */ ); } ASSERT (close (fd) == 0); { char byte; /* Trying to operate on a pipe must evoke failure with ESPIPE. This assumes that stdin is a pipe, and hence not seekable. */ ASSERT (pread (STDIN_FILENO, &byte, 1, 1) == -1); ASSERT (errno == ESPIPE); } /* Test behaviour for invalid file descriptors. */ { char byte; errno = 0; ASSERT (pread (-1, &byte, 1, 0) == -1); ASSERT (errno == EBADF); } { char byte; close (99); errno = 0; ASSERT (pread (99, &byte, 1, 0) == -1); ASSERT (errno == EBADF); } return 0; }