Damien Miller | 05ec5c6 | 1999-12-07 17:03:33 +1100 | [diff] [blame] | 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" |
Damien Miller | 5f05637 | 2000-04-16 12:31:48 +1000 | [diff] [blame] | 27 | RCSID("$Id: atomicio.c,v 1.11 2000/04/16 02:31:49 damien Exp $"); |
Damien Miller | 05ec5c6 | 1999-12-07 17:03:33 +1100 | [diff] [blame] | 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 | */ |
Damien Miller | 98c7ad6 | 2000-03-09 21:27:49 +1100 | [diff] [blame] | 35 | ssize_t |
Damien Miller | 7684ee1 | 2000-03-17 23:40:15 +1100 | [diff] [blame] | 36 | atomicio(f, fd, _s, n) |
Damien Miller | 98c7ad6 | 2000-03-09 21:27:49 +1100 | [diff] [blame] | 37 | ssize_t (*f) (); |
Damien Miller | 05ec5c6 | 1999-12-07 17:03:33 +1100 | [diff] [blame] | 38 | int fd; |
Damien Miller | 7684ee1 | 2000-03-17 23:40:15 +1100 | [diff] [blame] | 39 | void *_s; |
Damien Miller | 05ec5c6 | 1999-12-07 17:03:33 +1100 | [diff] [blame] | 40 | size_t n; |
| 41 | { |
Damien Miller | 7684ee1 | 2000-03-17 23:40:15 +1100 | [diff] [blame] | 42 | char *s = _s; |
Damien Miller | 98c7ad6 | 2000-03-09 21:27:49 +1100 | [diff] [blame] | 43 | ssize_t res, pos = 0; |
Damien Miller | 05ec5c6 | 1999-12-07 17:03:33 +1100 | [diff] [blame] | 44 | |
| 45 | while (n > pos) { |
Damien Miller | 5f05637 | 2000-04-16 12:31:48 +1000 | [diff] [blame] | 46 | res = (f) (fd, s + pos, n - pos); |
Damien Miller | 05ec5c6 | 1999-12-07 17:03:33 +1100 | [diff] [blame] | 47 | switch (res) { |
| 48 | case -1: |
| 49 | if (errno == EINTR || errno == EAGAIN) |
| 50 | continue; |
| 51 | case 0: |
| 52 | return (res); |
| 53 | default: |
| 54 | pos += res; |
| 55 | } |
| 56 | } |
| 57 | return (pos); |
| 58 | } |