Annotation of src/usr.bin/sendbug/atomicio.c, Revision 1.1
1.1 ! ray 1: /* $OpenBSD: atomicio.c,v 1.23 2006/08/03 03:34:41 deraadt Exp $ */
! 2: /*
! 3: * Copyright (c) 2006 Damien Miller. All rights reserved.
! 4: * Copyright (c) 2005 Anil Madhavapeddy. All rights reserved.
! 5: * Copyright (c) 1995,1999 Theo de Raadt. All rights reserved.
! 6: * All rights reserved.
! 7: *
! 8: * Redistribution and use in source and binary forms, with or without
! 9: * modification, are permitted provided that the following conditions
! 10: * are met:
! 11: * 1. Redistributions of source code must retain the above copyright
! 12: * notice, this list of conditions and the following disclaimer.
! 13: * 2. Redistributions in binary form must reproduce the above copyright
! 14: * notice, this list of conditions and the following disclaimer in the
! 15: * documentation and/or other materials provided with the distribution.
! 16: *
! 17: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
! 18: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
! 19: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
! 20: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
! 21: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
! 22: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
! 23: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
! 24: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
! 25: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
! 26: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 27: */
! 28:
! 29: #include <sys/param.h>
! 30: #include <sys/uio.h>
! 31:
! 32: #include <errno.h>
! 33: #include <string.h>
! 34:
! 35: #include "atomicio.h"
! 36:
! 37: /*
! 38: * ensure all of data on socket comes through. f==read || f==vwrite
! 39: */
! 40: size_t
! 41: atomicio(ssize_t (*f) (int, void *, size_t), int fd, void *_s, size_t n)
! 42: {
! 43: char *s = _s;
! 44: size_t pos = 0;
! 45: ssize_t res;
! 46:
! 47: while (n > pos) {
! 48: res = (f) (fd, s + pos, n - pos);
! 49: switch (res) {
! 50: case -1:
! 51: if (errno == EINTR || errno == EAGAIN)
! 52: continue;
! 53: return 0;
! 54: case 0:
! 55: errno = EPIPE;
! 56: return pos;
! 57: default:
! 58: pos += (size_t)res;
! 59: }
! 60: }
! 61: return (pos);
! 62: }