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/*
* Copyright 1987, 1988 by the Massachusetts Institute of Technology.
* For copying and distribution information, please see the file
* <Copyright.MIT>.
*
* from: netread.c,v 4.1 88/11/15 16:47:21 jtkohl Exp $
* $FreeBSD$
*/
#if 0
#ifndef lint
static char rcsid[] =
"$FreeBSD$";
#endif lint
#endif
#include <unistd.h>
/*
* krb_net_read() reads from the file descriptor "fd" to the buffer
* "buf", until either 1) "len" bytes have been read or 2) cannot
* read anymore from "fd". It returns the number of bytes read
* or a read() error. (The calling interface is identical to
* read(2).)
*
* XXX must not use non-blocking I/O
*/
int
krb_net_read(fd, buf, len)
int fd;
register char *buf;
register int len;
{
int cc, len2 = 0;
do {
cc = read(fd, buf, len);
if (cc < 0)
return(cc); /* errno is already set */
else if (cc == 0) {
return(len2);
} else {
buf += cc;
len2 += cc;
len -= cc;
}
} while (len > 0);
return(len2);
}
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