Mercurial > dropbear
view atomicio.c @ 1204:d2f9ef67af15
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author | Matt Johnston <matt@ucc.asn.au> |
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date | Fri, 11 Dec 2015 22:12:12 +0800 |
parents | 1bb50993acf1 |
children | 968be6f7cff6 |
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/* * Copied from OpenSSH 3.6.1p2. * * 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. */ /* RCSID("OpenBSD: atomicio.c,v 1.10 2001/05/08 22:48:07 markus Exp "); */ #include "atomicio.h" /* * ensure all of data on socket comes through. f==read || f==write */ ssize_t atomicio(f, fd, _s, n) ssize_t (*f) (); int fd; void *_s; size_t n; { char *s = _s; ssize_t res; size_t pos = 0; while (n > pos) { res = (f) (fd, s + pos, n - pos); switch (res) { case -1: #ifdef EWOULDBLOCK if (errno == EINTR || errno == EAGAIN || errno == EWOULDBLOCK) #else if (errno == EINTR || errno == EAGAIN) #endif continue; case 0: return (res); default: pos += res; } } return (pos); }