1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2015 Nahanni Systems, Inc. 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 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 */ 30 31 #include <sys/cdefs.h> 32 __FBSDID("$FreeBSD$"); 33 34 #include <sys/types.h> 35 #include <unistd.h> 36 37 #include <errno.h> 38 39 #include "sockstream.h" 40 41 ssize_t 42 stream_read(int fd, void *buf, ssize_t nbytes) 43 { 44 uint8_t *p; 45 ssize_t len = 0; 46 ssize_t n; 47 48 p = buf; 49 50 while (len < nbytes) { 51 n = read(fd, p + len, nbytes - len); 52 if (n == 0) 53 break; 54 55 if (n < 0) { 56 if (errno == EINTR || errno == EAGAIN) 57 continue; 58 return (n); 59 } 60 len += n; 61 } 62 return (len); 63 } 64 65 ssize_t 66 stream_write(int fd, const void *buf, ssize_t nbytes) 67 { 68 const uint8_t *p; 69 ssize_t len = 0; 70 ssize_t n; 71 72 p = buf; 73 74 while (len < nbytes) { 75 n = write(fd, p + len, nbytes - len); 76 if (n == 0) 77 break; 78 if (n < 0) { 79 if (errno == EINTR || errno == EAGAIN) 80 continue; 81 return (n); 82 } 83 len += n; 84 } 85 return (len); 86 } 87