/* * $Source: /mit/kerberos/src/lib/krb/RCS/netread.c,v $ * $Author: jtkohl $ * * Copyright 1987, 1988 by the Massachusetts Institute of Technology. * * For copying and distribution information, please see the file * <mit-copyright.h>. */ #ifndef lint static char rcsid_netread_c[] = "$Header: netread.c,v 4.1 88/11/15 16:47:21 jtkohl Exp $"; #endif lint #include <mit-copyright.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); }