56 lines
1.7 KiB
C
56 lines
1.7 KiB
C
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/*
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Copyright (C) 1989 by the Massachusetts Institute of Technology
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Export of this software from the United States of America is assumed
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to require a specific license from the United States Government.
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It is the responsibility of any person or organization contemplating
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export to obtain such a license before exporting.
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WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
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distribute this software and its documentation for any purpose and
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without fee is hereby granted, provided that the above copyright
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notice appear in all copies and that both that copyright notice and
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this permission notice appear in supporting documentation, and that
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the name of M.I.T. not be used in advertising or publicity pertaining
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to distribution of the software without specific, written prior
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permission. M.I.T. makes no representations about the suitability of
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this software for any purpose. It is provided "as is" without express
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or implied warranty.
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*/
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#include "krb_locl.h"
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RCSID("$Id: netread.c,v 1.6 1997/03/23 03:53:15 joda Exp $");
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/*
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* krb_net_read() reads from the file descriptor "fd" to the buffer
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* "buf", until either 1) "len" bytes have been read or 2) cannot
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* read anymore from "fd". It returns the number of bytes read
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* or a read() error. (The calling interface is identical to
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* read(2).)
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*
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* XXX must not use non-blocking I/O
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*/
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int
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krb_net_read (int fd, void *v, size_t len)
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{
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int cc, len2 = 0;
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char *buf = v;
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do {
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cc = read(fd, buf, len);
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if (cc < 0)
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return(cc); /* errno is already set */
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else if (cc == 0) {
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return(len2);
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} else {
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buf += cc;
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len2 += cc;
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len -= cc;
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}
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} while (len > 0);
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return(len2);
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}
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