| /* |
| * Check decoding of preadv and pwritev syscalls. |
| * |
| * Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org> |
| * Copyright (c) 2016-2017 The strace developers. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "tests.h" |
| |
| #if defined HAVE_PREADV && defined HAVE_PWRITEV |
| |
| # include <fcntl.h> |
| # include <stdio.h> |
| # include <sys/uio.h> |
| # include <unistd.h> |
| |
| int |
| main(void) |
| { |
| tprintf("%s", ""); |
| |
| static char tmp[] = "preadv-pwritev-tmpfile"; |
| if (open(tmp, O_CREAT|O_RDONLY|O_TRUNC, 0600) != 0) |
| perror_msg_and_fail("creat: %s", tmp); |
| if (open(tmp, O_WRONLY) != 1) |
| perror_msg_and_fail("open: %s", tmp); |
| if (unlink(tmp)) |
| perror_msg_and_fail("unlink: %s", tmp); |
| |
| static const char w0_c[] = "012"; |
| const char *w0_d = hexdump_strdup(w0_c); |
| void *w0 = tail_memdup(w0_c, LENGTH_OF(w0_c)); |
| |
| const void *efault = w0 + LENGTH_OF(w0_c); |
| |
| static const char w1_c[] = "34567"; |
| const char *w1_d = hexdump_strdup(w1_c); |
| void *w1 = tail_memdup(w1_c, LENGTH_OF(w1_c)); |
| |
| static const char w2_c[] = "89abcde"; |
| const char *w2_d = hexdump_strdup(w2_c); |
| void *w2 = tail_memdup(w2_c, LENGTH_OF(w2_c)); |
| |
| long rc; |
| |
| rc = pwritev(1, efault, 42, 0); |
| tprintf("pwritev(1, %p, 42, 0) = %ld %s (%m)\n", |
| efault, rc, errno2name()); |
| |
| rc = preadv(0, efault, 42, 0); |
| tprintf("preadv(0, %p, 42, 0) = %ld %s (%m)\n", |
| efault, rc, errno2name()); |
| |
| static const char r0_c[] = "01234567"; |
| const char *r0_d = hexdump_strdup(r0_c); |
| static const char r1_c[] = "89abcde"; |
| const char *r1_d = hexdump_strdup(r1_c); |
| |
| const struct iovec w_iov_[] = { |
| { |
| .iov_base = w0, |
| .iov_len = LENGTH_OF(w0_c) |
| }, { |
| .iov_base = w1, |
| .iov_len = LENGTH_OF(w1_c) |
| }, { |
| .iov_base = w2, |
| .iov_len = LENGTH_OF(w2_c) |
| } |
| }; |
| const struct iovec *w_iov = tail_memdup(w_iov_, sizeof(w_iov_)); |
| |
| rc = pwritev(1, w_iov, 0, 0); |
| if (rc) |
| perror_msg_and_fail("pwritev: expected 0, returned %ld", rc); |
| tprintf("pwritev(1, [], 0, 0) = 0\n"); |
| |
| rc = pwritev(1, w_iov + ARRAY_SIZE(w_iov_) - 1, 2, 0); |
| tprintf("pwritev(1, [{iov_base=\"%s\", iov_len=%u}, %p], 2, 0)" |
| " = %ld %s (%m)\n", |
| w2_c, LENGTH_OF(w2_c), w_iov + ARRAY_SIZE(w_iov_), |
| rc, errno2name()); |
| |
| const unsigned int w_len = |
| LENGTH_OF(w0_c) + LENGTH_OF(w1_c) + LENGTH_OF(w2_c); |
| |
| rc = pwritev(1, w_iov, ARRAY_SIZE(w_iov_), 0); |
| if (rc != (int) w_len) |
| perror_msg_and_fail("pwritev: expected %u, returned %ld", |
| w_len, rc); |
| close(1); |
| tprintf("pwritev(1, [{iov_base=\"%s\", iov_len=%u}" |
| ", {iov_base=\"%s\", iov_len=%u}" |
| ", {iov_base=\"%s\", iov_len=%u}], %u, 0) = %u\n" |
| " * %u bytes in buffer 0\n" |
| " | 00000 %-49s %-16s |\n" |
| " * %u bytes in buffer 1\n" |
| " | 00000 %-49s %-16s |\n" |
| " * %u bytes in buffer 2\n" |
| " | 00000 %-49s %-16s |\n", |
| w0_c, LENGTH_OF(w0_c), w1_c, LENGTH_OF(w1_c), |
| w2_c, LENGTH_OF(w2_c), (unsigned int) ARRAY_SIZE(w_iov_), w_len, |
| LENGTH_OF(w0_c), w0_d, w0_c, |
| LENGTH_OF(w1_c), w1_d, w1_c, LENGTH_OF(w2_c), w2_d, w2_c); |
| |
| const unsigned int r_len = (w_len + 1) / 2; |
| void *r0 = tail_alloc(r_len); |
| const struct iovec r0_iov_[] = { |
| { |
| .iov_base = r0, |
| .iov_len = r_len |
| } |
| }; |
| const struct iovec *r_iov = tail_memdup(r0_iov_, sizeof(r0_iov_)); |
| |
| rc = preadv(0, r_iov, ARRAY_SIZE(r0_iov_), 0); |
| if (rc != (int) r_len) |
| perror_msg_and_fail("preadv: expected %u, returned %ld", |
| r_len, rc); |
| tprintf("preadv(0, [{iov_base=\"%s\", iov_len=%u}], %u, 0) = %u\n" |
| " * %u bytes in buffer 0\n" |
| " | 00000 %-49s %-16s |\n", |
| r0_c, r_len, (unsigned int) ARRAY_SIZE(r0_iov_), |
| r_len, r_len, r0_d, r0_c); |
| |
| void *r1 = tail_alloc(r_len); |
| void *r2 = tail_alloc(w_len); |
| const struct iovec r1_iov_[] = { |
| { |
| .iov_base = r1, |
| .iov_len = r_len |
| }, |
| { |
| .iov_base = r2, |
| .iov_len = w_len |
| } |
| }; |
| r_iov = tail_memdup(r1_iov_, sizeof(r1_iov_)); |
| |
| rc = preadv(0, r_iov, ARRAY_SIZE(r1_iov_), r_len); |
| if (rc != (int) w_len - (int) r_len) |
| perror_msg_and_fail("preadv: expected %d, returned %ld", |
| (int) w_len - r_len, rc); |
| tprintf("preadv(0, [{iov_base=\"%s\", iov_len=%u}" |
| ", {iov_base=\"\", iov_len=%u}], %u, %u) = %u\n" |
| " * %u bytes in buffer 0\n" |
| " | 00000 %-49s %-16s |\n", |
| r1_c, r_len, w_len, (unsigned int) ARRAY_SIZE(r1_iov_), |
| r_len, w_len - r_len, |
| w_len - r_len, r1_d, r1_c); |
| close(0); |
| |
| tprintf("+++ exited with 0 +++\n"); |
| return 0; |
| } |
| |
| #else |
| |
| SKIP_MAIN_UNDEFINED("HAVE_PREADV && HAVE_PWRITEV") |
| |
| #endif |