1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * Copyright (c) 1995,1999 Theo de Raadt. All rights reserved. 3*0Sstevel@tonic-gate * All rights reserved. 4*0Sstevel@tonic-gate * 5*0Sstevel@tonic-gate * Redistribution and use in source and binary forms, with or without 6*0Sstevel@tonic-gate * modification, are permitted provided that the following conditions 7*0Sstevel@tonic-gate * are met: 8*0Sstevel@tonic-gate * 1. Redistributions of source code must retain the above copyright 9*0Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer. 10*0Sstevel@tonic-gate * 2. Redistributions in binary form must reproduce the above copyright 11*0Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer in the 12*0Sstevel@tonic-gate * documentation and/or other materials provided with the distribution. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 15*0Sstevel@tonic-gate * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16*0Sstevel@tonic-gate * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17*0Sstevel@tonic-gate * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 18*0Sstevel@tonic-gate * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19*0Sstevel@tonic-gate * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20*0Sstevel@tonic-gate * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21*0Sstevel@tonic-gate * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22*0Sstevel@tonic-gate * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23*0Sstevel@tonic-gate * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24*0Sstevel@tonic-gate */ 25*0Sstevel@tonic-gate 26*0Sstevel@tonic-gate #include "includes.h" 27*0Sstevel@tonic-gate RCSID("$OpenBSD: atomicio.c,v 1.10 2001/05/08 22:48:07 markus Exp $"); 28*0Sstevel@tonic-gate 29*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 30*0Sstevel@tonic-gate 31*0Sstevel@tonic-gate #include "atomicio.h" 32*0Sstevel@tonic-gate 33*0Sstevel@tonic-gate /* 34*0Sstevel@tonic-gate * ensure all of data on socket comes through. f==read || f==write 35*0Sstevel@tonic-gate */ 36*0Sstevel@tonic-gate ssize_t 37*0Sstevel@tonic-gate atomicio(f, fd, _s, n) 38*0Sstevel@tonic-gate ssize_t (*f) (); 39*0Sstevel@tonic-gate int fd; 40*0Sstevel@tonic-gate void *_s; 41*0Sstevel@tonic-gate size_t n; 42*0Sstevel@tonic-gate { 43*0Sstevel@tonic-gate char *s = _s; 44*0Sstevel@tonic-gate ssize_t res, pos = 0; 45*0Sstevel@tonic-gate 46*0Sstevel@tonic-gate while (n > pos) { 47*0Sstevel@tonic-gate res = (f) (fd, s + pos, n - pos); 48*0Sstevel@tonic-gate switch (res) { 49*0Sstevel@tonic-gate case -1: 50*0Sstevel@tonic-gate #ifdef EWOULDBLOCK 51*0Sstevel@tonic-gate if (errno == EINTR || errno == EAGAIN || errno == EWOULDBLOCK) 52*0Sstevel@tonic-gate #else 53*0Sstevel@tonic-gate if (errno == EINTR || errno == EAGAIN) 54*0Sstevel@tonic-gate #endif 55*0Sstevel@tonic-gate continue; 56*0Sstevel@tonic-gate /* FALLTHROUGH */ 57*0Sstevel@tonic-gate case 0: 58*0Sstevel@tonic-gate return (res); 59*0Sstevel@tonic-gate default: 60*0Sstevel@tonic-gate pos += res; 61*0Sstevel@tonic-gate } 62*0Sstevel@tonic-gate } 63*0Sstevel@tonic-gate return (pos); 64*0Sstevel@tonic-gate } 65