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| -rw-r--r-- | test/misc/tst-preadvwritev.c | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/test/misc/tst-preadvwritev.c b/test/misc/tst-preadvwritev.c new file mode 100644 index 0000000..e9818d4 --- /dev/null +++ b/test/misc/tst-preadvwritev.c @@ -0,0 +1,125 @@ +/* Tests for preadv and pwritev. + Copyright (C) 2016 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#define __USE_MISC +#include <sys/uio.h> + +static void do_prepare (void); +#define PREPARE(argc, argv) do_prepare () +static int do_test (void); +#define TEST_FUNCTION do_test () +#include "test-skeleton.c" + +static char *temp_filename; +static int temp_fd; + +static void +do_prepare (void) +{ + temp_fd = create_temp_file ("tst-preadvwritev.", &temp_filename); + if (temp_fd == -1) + { + printf ("cannot create temporary file: %m\n"); + exit (1); + } +} + +#if defined(preadv) && defined(pwritev) + +#define FAIL(str) \ + do { printf ("error: %s (line %d)\n", str, __LINE__); return 1; } while (0) + +static int +do_test_with_offset (off_t offset) +{ + struct iovec iov[2]; + ssize_t ret; + + char buf1[32]; + char buf2[64]; + + memset (buf1, 0xf0, sizeof buf1); + memset (buf2, 0x0f, sizeof buf2); + + /* Write two buffer with 32 and 64 bytes respectively. */ + memset (iov, 0, sizeof iov); + iov[0].iov_base = buf1; + iov[0].iov_len = sizeof buf1; + iov[1].iov_base = buf2; + iov[1].iov_len = sizeof buf2; + + ret = pwritev (temp_fd, iov, 2, offset); + if (ret == -1) + FAIL ("first pwritev returned -1"); + if (ret != (sizeof buf1 + sizeof buf2)) + FAIL ("first pwritev returned an unexpected value"); + + ret = pwritev (temp_fd, iov, 2, sizeof buf1 + sizeof buf2 + offset); + if (ret == -1) + FAIL ("second pwritev returned -1"); + if (ret != (sizeof buf1 + sizeof buf2)) + FAIL ("second pwritev returned an unexpected value"); + + char buf3[32]; + char buf4[64]; + + memset (buf3, 0x0f, sizeof buf3); + memset (buf4, 0xf0, sizeof buf4); + + iov[0].iov_base = buf3; + iov[0].iov_len = sizeof buf3; + iov[1].iov_base = buf4; + iov[1].iov_len = sizeof buf4; + + /* Now read two buffer with 32 and 64 bytes respectively. */ + ret = preadv (temp_fd, iov, 2, offset); + if (ret == -1) + FAIL ("first preadv returned -1"); + if (ret != (sizeof buf3 + sizeof buf4)) + FAIL ("first preadv returned an unexpected value"); + + if (memcmp (buf1, buf3, sizeof buf1) != 0) + FAIL ("first buffer from first preadv different than expected"); + if (memcmp (buf2, buf4, sizeof buf2) != 0) + FAIL ("second buffer from first preadv different than expected"); + + ret = preadv (temp_fd, iov, 2, sizeof buf3 + sizeof buf4 + offset); + if (ret == -1) + FAIL ("second preadv returned -1"); + if (ret != (sizeof buf3 + sizeof buf4)) + FAIL ("second preadv returned an unexpected value"); + + /* And compare the buffers read and written to check if there are equal. */ + if (memcmp (buf1, buf3, sizeof buf1) != 0) + FAIL ("first buffer from second preadv different than expected"); + if (memcmp (buf2, buf4, sizeof buf2) != 0) + FAIL ("second buffer from second preadv different than expected"); + + return 0; +} +#endif + +static int +do_test (void) +{ +#if defined(preadv) && defined(pwritev) + return do_test_with_offset (0); +#else + return 23; +#endif +} |