1 /*- 2 * Copyright (c) 2015 Nahanni Systems, Inc. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/types.h> 33 #include <unistd.h> 34 35 #include <errno.h> 36 37 #include "sockstream.h" 38 39 ssize_t 40 stream_read(int fd, void *buf, ssize_t nbytes) 41 { 42 uint8_t *p; 43 ssize_t len = 0; 44 ssize_t n; 45 46 p = buf; 47 48 while (len < nbytes) { 49 n = read(fd, p + len, nbytes - len); 50 if (n == 0) 51 break; 52 53 if (n < 0) { 54 if (errno == EINTR || errno == EAGAIN) 55 continue; 56 return (n); 57 } 58 len += n; 59 } 60 return (len); 61 } 62 63 ssize_t 64 stream_write(int fd, const void *buf, ssize_t nbytes) 65 { 66 const uint8_t *p; 67 ssize_t len = 0; 68 ssize_t n; 69 70 p = buf; 71 72 while (len < nbytes) { 73 n = write(fd, p + len, nbytes - len); 74 if (n == 0) 75 break; 76 if (n < 0) { 77 if (errno == EINTR || errno == EAGAIN) 78 continue; 79 return (n); 80 } 81 len += n; 82 } 83 return (len); 84 } 85 86 87