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 } 64