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Commit | Line | Data |
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521b3913 | 1 | /* |
05624c18 | 2 | * Copyright (c) 2005 Anil Madhavapeddy. All rights reserved. |
f3c7c613 | 3 | * Copyright (c) 1995,1999 Theo de Raadt. All rights reserved. |
521b3913 | 4 | * All rights reserved. |
5 | * | |
6 | * Redistribution and use in source and binary forms, with or without | |
7 | * modification, are permitted provided that the following conditions | |
8 | * are met: | |
9 | * 1. Redistributions of source code must retain the above copyright | |
10 | * notice, this list of conditions and the following disclaimer. | |
11 | * 2. Redistributions in binary form must reproduce the above copyright | |
12 | * notice, this list of conditions and the following disclaimer in the | |
13 | * documentation and/or other materials provided with the distribution. | |
14 | * | |
15 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
16 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
17 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
18 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
19 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
20 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
21 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
22 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
23 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
24 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
25 | */ | |
26 | ||
27 | #include "includes.h" | |
cfb9181c | 28 | RCSID("$OpenBSD: atomicio.c,v 1.14 2006/02/11 19:31:18 otto Exp $"); |
521b3913 | 29 | |
42f11eb2 | 30 | #include "atomicio.h" |
521b3913 | 31 | |
32 | /* | |
4899ccef | 33 | * ensure all of data on socket comes through. f==read || f==vwrite |
521b3913 | 34 | */ |
05624c18 | 35 | size_t |
610cd5c6 | 36 | atomicio(f, fd, _s, n) |
dc54438a | 37 | ssize_t (*f) (int, void *, size_t); |
521b3913 | 38 | int fd; |
610cd5c6 | 39 | void *_s; |
521b3913 | 40 | size_t n; |
41 | { | |
610cd5c6 | 42 | char *s = _s; |
05624c18 | 43 | size_t pos = 0; |
44 | ssize_t res; | |
521b3913 | 45 | |
46 | while (n > pos) { | |
35484284 | 47 | res = (f) (fd, s + pos, n - pos); |
521b3913 | 48 | switch (res) { |
49 | case -1: | |
b28e4a3b | 50 | #ifdef EWOULDBLOCK |
51 | if (errno == EINTR || errno == EAGAIN || errno == EWOULDBLOCK) | |
52 | #else | |
521b3913 | 53 | if (errno == EINTR || errno == EAGAIN) |
b28e4a3b | 54 | #endif |
521b3913 | 55 | continue; |
05624c18 | 56 | return 0; |
521b3913 | 57 | case 0: |
05624c18 | 58 | errno = EPIPE; |
59 | return pos; | |
521b3913 | 60 | default: |
cfb9181c | 61 | pos += (size_t)res; |
521b3913 | 62 | } |
63 | } | |
64 | return (pos); | |
65 | } |