1 /* $NetBSD: net_write.c,v 1.1.1.1 2011/04/13 18:15:42 elric Exp $ */ 2 3 /* 4 * Copyright (c) 1995, 1996, 1997, 1998 Kungliga Tekniska Högskolan 5 * (Royal Institute of Technology, Stockholm, Sweden). 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * 3. Neither the name of the Institute nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <config.h> 37 38 #include <krb5/roken.h> 39 40 /* 41 * Like write but never return partial data. 42 */ 43 44 #ifndef _WIN32 45 46 ROKEN_LIB_FUNCTION ssize_t ROKEN_LIB_CALL 47 net_write (rk_socket_t fd, const void *buf, size_t nbytes) 48 { 49 const char *cbuf = (const char *)buf; 50 ssize_t count; 51 size_t rem = nbytes; 52 53 while (rem > 0) { 54 count = write (fd, cbuf, rem); 55 if (count < 0) { 56 if (errno == EINTR) 57 continue; 58 else 59 return count; 60 } 61 cbuf += count; 62 rem -= count; 63 } 64 return nbytes; 65 } 66 67 #else 68 69 ROKEN_LIB_FUNCTION ssize_t ROKEN_LIB_CALL 70 net_write(rk_socket_t sock, const void *buf, size_t nbytes) 71 { 72 const char *cbuf = (const char *)buf; 73 ssize_t count; 74 size_t rem = nbytes; 75 #ifdef SOCKET_IS_NOT_AN_FD 76 int use_write = 0; 77 #endif 78 79 while (rem > 0) { 80 #ifdef SOCKET_IS_NOT_AN_FD 81 if (use_write) 82 count = _write (sock, cbuf, rem); 83 else 84 count = send (sock, cbuf, rem, 0); 85 86 if (use_write == 0 && 87 rk_IS_SOCKET_ERROR(count) && 88 (rk_SOCK_ERRNO == WSANOTINITIALISED || 89 rk_SOCK_ERRNO == WSAENOTSOCK)) { 90 use_write = 1; 91 92 count = _write (sock, cbuf, rem); 93 } 94 #else 95 count = send (sock, cbuf, rem, 0); 96 #endif 97 if (count < 0) { 98 if (errno == EINTR) 99 continue; 100 else 101 return count; 102 } 103 cbuf += count; 104 rem -= count; 105 } 106 return nbytes; 107 } 108 109 #endif 110