1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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 29 #include <sys/types.h> 30 #include <unistd.h> 31 32 #include <errno.h> 33 34 #include "sockstream.h" 35 36 ssize_t 37 stream_read(int fd, void *buf, ssize_t nbytes) 38 { 39 uint8_t *p; 40 ssize_t len = 0; 41 ssize_t n; 42 43 p = buf; 44 45 while (len < nbytes) { 46 n = read(fd, p + len, nbytes - len); 47 if (n == 0) 48 break; 49 50 if (n < 0) { 51 if (errno == EINTR || errno == EAGAIN) 52 continue; 53 return (n); 54 } 55 len += n; 56 } 57 return (len); 58 } 59 60 ssize_t 61 stream_write(int fd, const void *buf, ssize_t nbytes) 62 { 63 const uint8_t *p; 64 ssize_t len = 0; 65 ssize_t n; 66 67 p = buf; 68 69 while (len < nbytes) { 70 n = write(fd, p + len, nbytes - len); 71 if (n == 0) 72 break; 73 if (n < 0) { 74 if (errno == EINTR || errno == EAGAIN) 75 continue; 76 return (n); 77 } 78 len += n; 79 } 80 return (len); 81 } 82