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annotate atomicio.c @ 1450:5b25d86b865b fuzz
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author | Matt Johnston <matt@ucc.asn.au> |
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date | Mon, 14 Aug 2017 00:00:10 +0800 |
parents | 83d85b28b353 |
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1 /* $OpenBSD: atomicio.c,v 1.17 2006/04/01 05:51:34 djm Exp $ */ |
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2 /* |
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3 * Copied from OpenSSH/OpenBSD. |
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4 * |
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5 * Copyright (c) 2005 Anil Madhavapeddy. All rights reserved. |
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6 * Copyright (c) 1995,1999 Theo de Raadt. All rights reserved. |
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7 * All rights reserved. |
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8 * |
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9 * Redistribution and use in source and binary forms, with or without |
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10 * modification, are permitted provided that the following conditions |
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11 * are met: |
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12 * 1. Redistributions of source code must retain the above copyright |
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13 * notice, this list of conditions and the following disclaimer. |
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14 * 2. Redistributions in binary form must reproduce the above copyright |
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15 * notice, this list of conditions and the following disclaimer in the |
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16 * documentation and/or other materials provided with the distribution. |
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17 * |
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18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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28 */ |
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29 |
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30 #include "includes.h" |
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31 |
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32 #include "atomicio.h" |
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33 |
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34 /* |
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35 * ensure all of data on socket comes through. f==read || f==vwrite |
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36 */ |
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37 size_t |
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38 atomicio(ssize_t (*f) (int, void *, size_t), int fd, void *_s, size_t n) |
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39 { |
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40 char *s = _s; |
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41 size_t pos = 0; |
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42 ssize_t res; |
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43 |
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44 while (n > pos) { |
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45 res = (f) (fd, s + pos, n - pos); |
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46 switch (res) { |
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47 case -1: |
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48 if (errno == EINTR || errno == EAGAIN) |
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49 continue; |
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50 return 0; |
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51 case 0: |
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52 errno = EPIPE; |
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53 return pos; |
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54 default: |
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55 pos += (size_t)res; |
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56 } |
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57 } |
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58 return (pos); |
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59 } |