Mercurial > dropbear

annotate atomicio.c @ 1629:258b57b208ae

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Fix for issue successfull login of disabled user (#78) This commit introduces fix for scenario: 1. Root login disabled on dropbear 2. PAM authentication model enabled While login as root user, after prompt for password user is being notified about login failrue, but after second attempt of prompt for password within same session, login becames succesfull. Signed-off-by: Pawel Rapkiewicz <[email protected]>
author vincentto13 <33652988+vincentto13@users.noreply.github.com>
date Wed, 20 Mar 2019 15:03:40 +0100
parents 83d85b28b353
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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Francois Perrad <francois.perrad@gadz.org>
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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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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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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 }