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
net_write(rk_socket_t fd,const void * buf,size_t nbytes)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
net_write(rk_socket_t sock,const void * buf,size_t nbytes)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