Damien Miller | 05ec5c6 | 1999-12-07 17:03:33 +1100 | [diff] [blame] | 1 | /* |
Damien Miller | b253cc4 | 2005-05-26 12:23:44 +1000 | [diff] [blame] | 2 | * Copyright (c) 2005 Anil Madhavapeddy. All rights reserved. |
Ben Lindstrom | 92a2e38 | 2001-03-05 06:59:27 +0000 | [diff] [blame] | 3 | * Copyright (c) 1995,1999 Theo de Raadt. All rights reserved. |
Damien Miller | 05ec5c6 | 1999-12-07 17:03:33 +1100 | [diff] [blame] | 4 | * All rights reserved. |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions |
| 8 | * are met: |
| 9 | * 1. Redistributions of source code must retain the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer. |
| 11 | * 2. Redistributions in binary form must reproduce the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer in the |
| 13 | * documentation and/or other materials provided with the distribution. |
| 14 | * |
| 15 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 16 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 17 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 18 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 19 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 20 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 21 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 22 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 23 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 24 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 25 | */ |
| 26 | |
| 27 | #include "includes.h" |
Damien Miller | 3fd019e | 2006-03-15 11:29:51 +1100 | [diff] [blame] | 28 | RCSID("$OpenBSD: atomicio.c,v 1.14 2006/02/11 19:31:18 otto Exp $"); |
Damien Miller | 05ec5c6 | 1999-12-07 17:03:33 +1100 | [diff] [blame] | 29 | |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 30 | #include "atomicio.h" |
Damien Miller | 05ec5c6 | 1999-12-07 17:03:33 +1100 | [diff] [blame] | 31 | |
| 32 | /* |
Darren Tucker | 85f04c6 | 2003-08-03 00:05:58 +1000 | [diff] [blame] | 33 | * ensure all of data on socket comes through. f==read || f==vwrite |
Damien Miller | 05ec5c6 | 1999-12-07 17:03:33 +1100 | [diff] [blame] | 34 | */ |
Damien Miller | b253cc4 | 2005-05-26 12:23:44 +1000 | [diff] [blame] | 35 | size_t |
Damien Miller | 7684ee1 | 2000-03-17 23:40:15 +1100 | [diff] [blame] | 36 | atomicio(f, fd, _s, n) |
Darren Tucker | 9f63f22 | 2003-07-03 13:46:56 +1000 | [diff] [blame] | 37 | ssize_t (*f) (int, void *, size_t); |
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 | b253cc4 | 2005-05-26 12:23:44 +1000 | [diff] [blame] | 43 | size_t pos = 0; |
| 44 | ssize_t res; |
Damien Miller | 05ec5c6 | 1999-12-07 17:03:33 +1100 | [diff] [blame] | 45 | |
| 46 | while (n > pos) { |
Damien Miller | 5f05637 | 2000-04-16 12:31:48 +1000 | [diff] [blame] | 47 | res = (f) (fd, s + pos, n - pos); |
Damien Miller | 05ec5c6 | 1999-12-07 17:03:33 +1100 | [diff] [blame] | 48 | switch (res) { |
| 49 | case -1: |
Damien Miller | f2fdbe5 | 2000-07-08 10:57:08 +1000 | [diff] [blame] | 50 | #ifdef EWOULDBLOCK |
| 51 | if (errno == EINTR || errno == EAGAIN || errno == EWOULDBLOCK) |
| 52 | #else |
Damien Miller | 05ec5c6 | 1999-12-07 17:03:33 +1100 | [diff] [blame] | 53 | if (errno == EINTR || errno == EAGAIN) |
Damien Miller | f2fdbe5 | 2000-07-08 10:57:08 +1000 | [diff] [blame] | 54 | #endif |
Damien Miller | 05ec5c6 | 1999-12-07 17:03:33 +1100 | [diff] [blame] | 55 | continue; |
Damien Miller | b253cc4 | 2005-05-26 12:23:44 +1000 | [diff] [blame] | 56 | return 0; |
Damien Miller | 05ec5c6 | 1999-12-07 17:03:33 +1100 | [diff] [blame] | 57 | case 0: |
Damien Miller | b253cc4 | 2005-05-26 12:23:44 +1000 | [diff] [blame] | 58 | errno = EPIPE; |
| 59 | return pos; |
Damien Miller | 05ec5c6 | 1999-12-07 17:03:33 +1100 | [diff] [blame] | 60 | default: |
Damien Miller | 3fd019e | 2006-03-15 11:29:51 +1100 | [diff] [blame] | 61 | pos += (size_t)res; |
Damien Miller | 05ec5c6 | 1999-12-07 17:03:33 +1100 | [diff] [blame] | 62 | } |
| 63 | } |
| 64 | return (pos); |
| 65 | } |