xref: /illumos-gate/usr/src/lib/gss_mechs/mech_krb5/krb5/os/net_write.c (revision 55fea89dcaa64928bed4327112404dcb3e07b79f)
1 /*
2  * lib/krb5/os/net_write.c
3  *
4  * Copyright 1987, 1988, 1990 by the Massachusetts Institute of Technology.
5  * All Rights Reserved.
6  *
7  * Export of this software from the United States of America may
8  *   require a specific license from the United States Government.
9  *   It is the responsibility of any person or organization contemplating
10  *   export to obtain such a license before exporting.
11  *
12  * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
13  * distribute this software and its documentation for any purpose and
14  * without fee is hereby granted, provided that the above copyright
15  * notice appear in all copies and that both that copyright notice and
16  * this permission notice appear in supporting documentation, and that
17  * the name of M.I.T. not be used in advertising or publicity pertaining
18  * to distribution of the software without specific, written prior
19  * permission.  Furthermore if you modify this software you must label
20  * your software as modified software and not distribute it in such a
21  * fashion that it might be confused with the original M.I.T. software.
22  * M.I.T. makes no representations about the suitability of
23  * this software for any purpose.  It is provided "as is" without express
24  * or implied warranty.
25  *
26  */
27 
28 #include "k5-int.h"
29 
30 /*
31  * krb5_net_write() writes "len" bytes from "buf" to the file
32  * descriptor "fd".  It returns the number of bytes written or
33  * a write() error.  (The calling interface is identical to
34  * write(2).)
35  *
36  * XXX must not use non-blocking I/O
37  */
38 
39 /*ARGSUSED*/
40 int
krb5_net_write(krb5_context context,int fd,register const char * buf,int len)41 krb5_net_write(krb5_context context, int fd, register const char *buf, int len)
42 {
43     int cc;
44     register int wrlen = len;
45     do {
46 	cc = SOCKET_WRITE((SOCKET)fd, buf, wrlen);
47 	if (cc < 0) {
48 	    if (SOCKET_ERRNO == SOCKET_EINTR)
49 		continue;
50 
51 		/* XXX this interface sucks! */
52         errno = SOCKET_ERRNO;
53 
54 	    return(cc);
55 	}
56 	else {
57 	    buf += cc;
58 	    wrlen -= cc;
59 	}
60     } while (wrlen > 0);
61     return(len);
62 }
63