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authorXin LI <delphij@FreeBSD.org>2008-09-27 00:53:34 +0000
committerXin LI <delphij@FreeBSD.org>2008-09-27 00:53:34 +0000
commitb3b9c2bbcbfcfcf82bad6883010212cd729b95d5 (patch)
tree0333f89179cbc0450520419ce10b8f3ed4e5ff0c /atomicio.c
parentc7c53f7a0355239b6dd9bcb403c7e820fbc9577b (diff)
downloadsrc-b3b9c2bbcbfcfcf82bad6883010212cd729b95d5.tar.gz
src-b3b9c2bbcbfcfcf82bad6883010212cd729b95d5.zip
Flatten all tags of the dist tree of netcat.
Notes
Notes: svn path=/vendor/netcat/dist/; revision=183393
Diffstat (limited to 'atomicio.c')
-rw-r--r--atomicio.c69
1 files changed, 69 insertions, 0 deletions
diff --git a/atomicio.c b/atomicio.c
new file mode 100644
index 000000000000..e9d98b3561e8
--- /dev/null
+++ b/atomicio.c
@@ -0,0 +1,69 @@
+/* $OpenBSD: atomicio.c,v 1.9 2007/09/07 14:50:44 tobias Exp $ */
+/*
+ * Copyright (c) 2006 Damien Miller. All rights reserved.
+ * Copyright (c) 2005 Anil Madhavapeddy. All rights reserved.
+ * Copyright (c) 1995,1999 Theo de Raadt. All rights reserved.
+ * 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.
+ *
+ * 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 <sys/param.h>
+
+#include <errno.h>
+#include <poll.h>
+#include <unistd.h>
+
+#include "atomicio.h"
+
+/*
+ * ensure all of data on socket comes through. f==read || f==vwrite
+ */
+size_t
+atomicio(ssize_t (*f) (int, void *, size_t), int fd, void *_s, size_t n)
+{
+ char *s = _s;
+ size_t pos = 0;
+ ssize_t res;
+ struct pollfd pfd;
+
+ pfd.fd = fd;
+ pfd.events = f == read ? POLLIN : POLLOUT;
+ while (n > pos) {
+ res = (f) (fd, s + pos, n - pos);
+ switch (res) {
+ case -1:
+ if (errno == EINTR)
+ continue;
+ if (errno == EAGAIN) {
+ (void)poll(&pfd, 1, -1);
+ continue;
+ }
+ return 0;
+ case 0:
+ errno = EPIPE;
+ return pos;
+ default:
+ pos += (size_t)res;
+ }
+ }
+ return (pos);
+}