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47 lines
1.0 KiB
C
47 lines
1.0 KiB
C
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/*
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* Copyright 1987, 1988 by the Massachusetts Institute of Technology.
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* For copying and distribution information, please see the file
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* <Copyright.MIT>.
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*
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* from: netread.c,v 4.1 88/11/15 16:47:21 jtkohl Exp $
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* $Id: netread.c,v 1.2 1994/07/19 19:26:03 g89r4222 Exp $
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*/
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#ifndef lint
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static char rcsid[] =
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"$Id: netread.c,v 1.2 1994/07/19 19:26:03 g89r4222 Exp $";
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#endif lint
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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(fd, buf, len)
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int fd;
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register char *buf;
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register int len;
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{
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int cc, len2 = 0;
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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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