Annotation of src/usr.bin/ssh/atomicio.c, Revision 1.16
1.16 ! djm 1: /* $OpenBSD$ */
1.1 deraadt 2: /*
1.13 avsm 3: * Copyright (c) 2005 Anil Madhavapeddy. All rights reserved.
1.9 deraadt 4: * Copyright (c) 1995,1999 Theo de Raadt. All rights reserved.
1.1 deraadt 5: * All rights reserved.
6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
15: *
16: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26: */
27:
28: #include "includes.h"
29:
1.8 markus 30: #include "atomicio.h"
1.1 deraadt 31:
32: /*
1.12 avsm 33: * ensure all of data on socket comes through. f==read || f==vwrite
1.1 deraadt 34: */
1.13 avsm 35: size_t
1.3 markus 36: atomicio(f, fd, _s, n)
1.11 deraadt 37: ssize_t (*f) (int, void *, size_t);
1.1 deraadt 38: int fd;
1.3 markus 39: void *_s;
1.1 deraadt 40: size_t n;
41: {
1.3 markus 42: char *s = _s;
1.13 avsm 43: size_t pos = 0;
44: ssize_t res;
1.1 deraadt 45:
46: while (n > pos) {
47: res = (f) (fd, s + pos, n - pos);
48: switch (res) {
49: case -1:
50: if (errno == EINTR || errno == EAGAIN)
51: continue;
1.13 avsm 52: return 0;
1.1 deraadt 53: case 0:
1.13 avsm 54: errno = EPIPE;
55: return pos;
1.1 deraadt 56: default:
1.14 otto 57: pos += (size_t)res;
1.1 deraadt 58: }
59: }
60: return (pos);
61: }