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Annotation of src/usr.bin/ssh/atomicio.c, Revision 1.1

1.1     ! deraadt     1: /*
        !             2:  * Copyright (c) 1999 Theo de Raadt
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms, with or without
        !             6:  * modification, are permitted provided that the following conditions
        !             7:  * are met:
        !             8:  * 1. Redistributions of source code must retain the above copyright
        !             9:  *    notice, this list of conditions and the following disclaimer.
        !            10:  * 2. Redistributions in binary form must reproduce the above copyright
        !            11:  *    notice, this list of conditions and the following disclaimer in the
        !            12:  *    documentation and/or other materials provided with the distribution.
        !            13:  *
        !            14:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
        !            15:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
        !            16:  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
        !            17:  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
        !            18:  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
        !            19:  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
        !            20:  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
        !            21:  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
        !            22:  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
        !            23:  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
        !            24:  */
        !            25:
        !            26: #include "includes.h"
        !            27: RCSID("$Id: scp.c,v 1.21 1999/11/24 20:26:35 markus Exp $");
        !            28:
        !            29: #include "xmalloc.h"
        !            30: #include "ssh.h"
        !            31:
        !            32: /*
        !            33:  * ensure all of data on socket comes through. f==read || f==write
        !            34:  */
        !            35: int
        !            36: atomicio(f, fd, s, n)
        !            37:        int (*f) ();
        !            38:        int fd;
        !            39:        void *s;
        !            40:        size_t n;
        !            41: {
        !            42:        int res, pos = 0;
        !            43:
        !            44:        while (n > pos) {
        !            45:                res = (f) (fd, s + pos, n - pos);
        !            46:                switch (res) {
        !            47:                case -1:
        !            48:                        if (errno == EINTR || errno == EAGAIN)
        !            49:                                continue;
        !            50:                case 0:
        !            51:                        return (res);
        !            52:                default:
        !            53:                        pos += res;
        !            54:                }
        !            55:        }
        !            56:        return (pos);
        !            57: }