+/*
+ * Copyright (c) 2014-2016 Dmitry V. Levin <ldv@altlinux.org>
+ * 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"
+
+#ifdef HAVE_PWRITEV
+
+# include <fcntl.h>
+# include <stdio.h>
+# include <sys/uio.h>
+# include <unistd.h>
+
+# define LEN 8
+# define LIM (LEN - 1)
+
+static void
+print_iov(const struct iovec *iov)
+{
+ unsigned int i;
+ unsigned char *buf = iov->iov_base;
+
+ fputs("{\"", stdout);
+ for (i = 0; i < iov->iov_len; ++i) {
+ if (i < LIM)
+ printf("\\%d", (int) buf[i]);
+ }
+ printf("\"%s, %u}",
+ i > LIM ? "..." : "", (unsigned) iov->iov_len);
+}
+
+static void
+print_iovec(const struct iovec *iov, unsigned int cnt, unsigned int size)
+{
+ if (!size) {
+ printf("%p", iov);
+ return;
+ }
+ unsigned int i;
+ putchar('[');
+ for (i = 0; i < cnt; ++i) {
+ if (i)
+ fputs(", ", stdout);
+ if (i == LIM) {
+ fputs("...", stdout);
+ break;
+ }
+ if (i == size) {
+ printf("%p", &iov[i]);
+ break;
+ }
+ print_iov(&iov[i]);
+ }
+ putchar(']');
+}
+
+int
+main(void)
+{
+ (void) close(0);
+ if (open("/dev/null", O_WRONLY))
+ perror_msg_and_fail("open");
+
+ char *buf = tail_alloc(LEN);
+ unsigned i;
+ for (i = 0; i < LEN; ++i)
+ buf[i] = i;
+
+ struct iovec *iov = tail_alloc(sizeof(*iov) * LEN);
+ for (i = 0; i < LEN; ++i) {
+ buf[i] = i;
+ iov[i].iov_base = &buf[i];
+ iov[i].iov_len = LEN - i;
+ }
+ tail_alloc(1);
+
+ const off_t offset = 0xdefaceddeadbeefLL;
+ int written = 0;
+ for (i = 0; i < LEN; ++i) {
+ written += iov[i].iov_len;
+ if (pwritev(0, iov, i + 1, offset + i) != written)
+ perror_msg_and_fail("pwritev");
+ fputs("pwritev(0, ", stdout);
+ print_iovec(iov, i + 1, LEN);
+ printf(", %u, %lld) = %d\n",
+ i + 1, (long long) offset + i, written);
+ }
+
+ for (i = 0; i <= LEN; ++i) {
+ unsigned int n = LEN + 1 - i;
+ if (pwritev(0, iov + i, n, offset + LEN + i) != -1)
+ perror_msg_and_fail("pwritev");
+ fputs("pwritev(0, ", stdout);
+ print_iovec(iov + i, n, LEN - i);
+ printf(", %u, %lld) = -1 EFAULT (%m)\n",
+ n, (long long) offset + LEN + i);
+ }
+
+ iov->iov_base = iov + LEN * 2;
+ if (pwritev(0, iov, 1, -1) != -1)
+ perror_msg_and_fail("pwritev");
+ printf("pwritev(0, [{%p, %d}], 1, -1) = -1 EINVAL (%m)\n",
+ iov->iov_base, LEN);
+
+ iov += LEN;
+ if (pwritev(0, iov, 42, -2) != -1)
+ perror_msg_and_fail("pwritev");
+ printf("pwritev(0, %p, 42, -2) = -1 EINVAL (%m)\n", iov);
+
+ if (pwritev(0, NULL, 1, -3) != -1)
+ perror_msg_and_fail("pwritev");
+ printf("pwritev(0, NULL, 1, -3) = -1 EINVAL (%m)\n");
+
+ if (pwritev(0, NULL, 0, -4) != -1)
+ perror_msg_and_fail("pwritev");
+ printf("pwritev(0, [], 0, -4) = -1 EINVAL (%m)\n");
+
+ puts("+++ exited with 0 +++");
+ return 0;
+}
+
+#else
+
+SKIP_MAIN_UNDEFINED("HAVE_PWRITEV")
+
+#endif