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Annotation of 43BSDReno/kerberosIV/krb/netread.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * $Source: /mit/kerberos/src/lib/krb/RCS/netread.c,v $
        !             3:  * $Author: jtkohl $
        !             4:  *
        !             5:  * Copyright 1987, 1988 by the Massachusetts Institute of Technology.
        !             6:  *
        !             7:  * For copying and distribution information, please see the file
        !             8:  * <mit-copyright.h>.
        !             9:  */
        !            10: 
        !            11: #ifndef        lint
        !            12: static char rcsid_netread_c[] =
        !            13: "$Header: netread.c,v 4.1 88/11/15 16:47:21 jtkohl Exp $";
        !            14: #endif lint
        !            15: 
        !            16: #include <mit-copyright.h>
        !            17: 
        !            18: /*
        !            19:  * krb_net_read() reads from the file descriptor "fd" to the buffer
        !            20:  * "buf", until either 1) "len" bytes have been read or 2) cannot
        !            21:  * read anymore from "fd".  It returns the number of bytes read
        !            22:  * or a read() error.  (The calling interface is identical to
        !            23:  * read(2).)
        !            24:  *
        !            25:  * XXX must not use non-blocking I/O
        !            26:  */
        !            27: 
        !            28: int
        !            29: krb_net_read(fd, buf, len)
        !            30: int fd;
        !            31: register char *buf;
        !            32: register int len;
        !            33: {
        !            34:     int cc, len2 = 0;
        !            35: 
        !            36:     do {
        !            37:        cc = read(fd, buf, len);
        !            38:        if (cc < 0)
        !            39:            return(cc);          /* errno is already set */
        !            40:        else if (cc == 0) {
        !            41:            return(len2);
        !            42:        } else {
        !            43:            buf += cc;
        !            44:            len2 += cc;
        !            45:            len -= cc;
        !            46:        }
        !            47:     } while (len > 0);
        !            48:     return(len2);
        !            49: }

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