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DEFINITIONS
This source file includes following definitions.
- net_read
1 /*
2 * Copyright (c) 1995, 1996, 1997, 1998 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * 3. Neither the name of the Institute nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34 #ifdef HAVE_CONFIG_H
35 #include <config.h>
36 RCSID("$Id$");
37 #endif
38
39 #include <sys/types.h>
40 #include <unistd.h>
41 #include <errno.h>
42
43 #include "roken.h"
44
45 /*
46 * Like read but never return partial data.
47 */
48
49 ssize_t ROKEN_LIB_FUNCTION
50 net_read (int fd, void *buf, size_t nbytes)
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51 {
52 char *cbuf = (char *)buf;
53 ssize_t count;
54 size_t rem = nbytes;
55
56 while (rem > 0) {
57 #ifdef WIN32
58 count = recv (fd, cbuf, rem, 0);
59 #else
60 count = read (fd, cbuf, rem);
61 #endif
62 if (count < 0) {
63 if (errno == EINTR)
64 continue;
65 else
66 return count;
67 } else if (count == 0) {
68 return count;
69 }
70 cbuf += count;
71 rem -= count;
72 }
73 return nbytes;
74 }