Mercurial > dropbear
comparison atomicio.c @ 391:00fcf5045160
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head c1db4398d56c56c6d06ae1e20c1e0d04dbb598ed)
to branch 'au.asn.ucc.matt.dropbear' (head d26d5eb2837f46b56a33fb0e7573aa0201abd4d5)
author | Matt Johnston <matt@ucc.asn.au> |
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date | Thu, 11 Jan 2007 04:29:08 +0000 |
parents | 1bb50993acf1 |
children | 968be6f7cff6 |
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390:d8e44bef7917 | 391:00fcf5045160 |
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1 /* | |
2 * Copied from OpenSSH 3.6.1p2. | |
3 * | |
4 * Copyright (c) 1995,1999 Theo de Raadt. All rights reserved. | |
5 * All rights reserved. | |
6 * | |
7 * Redistribution and use in source and binary forms, with or without | |
8 * modification, are permitted provided that the following conditions | |
9 * are met: | |
10 * 1. Redistributions of source code must retain the above copyright | |
11 * notice, this list of conditions and the following disclaimer. | |
12 * 2. Redistributions in binary form must reproduce the above copyright | |
13 * notice, this list of conditions and the following disclaimer in the | |
14 * documentation and/or other materials provided with the distribution. | |
15 * | |
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
26 */ | |
27 | |
28 /* RCSID("OpenBSD: atomicio.c,v 1.10 2001/05/08 22:48:07 markus Exp "); */ | |
29 | |
30 #include "atomicio.h" | |
31 | |
32 /* | |
33 * ensure all of data on socket comes through. f==read || f==write | |
34 */ | |
35 ssize_t | |
36 atomicio(f, fd, _s, n) | |
37 ssize_t (*f) (); | |
38 int fd; | |
39 void *_s; | |
40 size_t n; | |
41 { | |
42 char *s = _s; | |
43 ssize_t res; | |
44 size_t pos = 0; | |
45 | |
46 while (n > pos) { | |
47 res = (f) (fd, s + pos, n - pos); | |
48 switch (res) { | |
49 case -1: | |
50 #ifdef EWOULDBLOCK | |
51 if (errno == EINTR || errno == EAGAIN || errno == EWOULDBLOCK) | |
52 #else | |
53 if (errno == EINTR || errno == EAGAIN) | |
54 #endif | |
55 continue; | |
56 case 0: | |
57 return (res); | |
58 default: | |
59 pos += res; | |
60 } | |
61 } | |
62 return (pos); | |
63 } |