diff options
Diffstat (limited to 'gnulib/tests/test-pwrite.c')
m--------- | gnulib | 0 | ||||
-rw-r--r-- | gnulib/tests/test-pwrite.c | 95 |
2 files changed, 95 insertions, 0 deletions
diff --git a/gnulib b/gnulib deleted file mode 160000 -Subproject 443bc5ffcf7429e557f4a371b0661abe98ddbc1 diff --git a/gnulib/tests/test-pwrite.c b/gnulib/tests/test-pwrite.c new file mode 100644 index 0000000..5875b5a --- /dev/null +++ b/gnulib/tests/test-pwrite.c @@ -0,0 +1,95 @@ +/* Test the pwrite function. + Copyright (C) 2009-2011 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 <http://www.gnu.org/licenses/>. */ + +#include <config.h> + +#include <unistd.h> + +#include "signature.h" +SIGNATURE_CHECK (pwrite, ssize_t, (int, const void *, size_t, off_t)); + +#include <sys/types.h> +#include <fcntl.h> +#include <errno.h> +#include <string.h> + +#include "macros.h" + +#define N (sizeof buf - 1) + +int +main (void) +{ + char const *file = "out"; + int fd; + char buf[] = "0123456789"; + off_t pos = 2; + size_t i; + off_t init_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_WRONLY, 0600); + ASSERT (0 <= fd); + + init_pos = lseek (fd, pos, SEEK_SET); + ASSERT (init_pos == pos); + + for (i = 0; i < N; i+=2) + { + const char byte = 'W'; + ASSERT (pwrite (fd, &byte, 1, i) == 1); + ASSERT (lseek (fd, 0, SEEK_CUR) == init_pos); + } + + { + /* Invalid offset must evoke failure with EINVAL. */ + const char byte = 'b'; + ASSERT (pwrite (fd, &byte, 1, (off_t) -1) == -1); + ASSERT (errno == EINVAL); + } + + ASSERT (close (fd) == 0); + + { + fd = open (file, O_RDONLY); + ASSERT (0 <= fd); + ASSERT (read (fd, buf, N) == N); + ASSERT (close (fd) == 0); + ASSERT (strcmp ("W1W3W5W7W9",buf) == 0); + } + + /* Test behaviour for invalid file descriptors. */ + { + char byte = 'x'; + errno = 0; + ASSERT (pwrite (-1, &byte, 1, 0) == -1); + ASSERT (errno == EBADF); + } + { + char byte = 'x'; + errno = 0; + ASSERT (pwrite (99, &byte, 1, 0) == -1); + ASSERT (errno == EBADF); + } + + return 0; +} |