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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.bin/ssh/lib/../atomicio.c	Lines:	15	56	26.8 %
Date:	2017-11-13	Branches:	9	42	21.4 %


/* $OpenBSD: atomicio.c,v 1.28 2016/07/27 23:18:12 djm Exp $ */
/*
 * Copyright (c) 2006 Damien Miller. All rights reserved.
 * Copyright (c) 2005 Anil Madhavapeddy. All rights reserved.
 * Copyright (c) 1995,1999 Theo de Raadt.  All rights reserved.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/uio.h>

#include <errno.h>
#include <poll.h>
#include <string.h>
#include <unistd.h>
#include <limits.h>

#include "atomicio.h"

/*
 * ensure all of data on socket comes through. f==read || f==vwrite
 */
size_t
atomicio6(ssize_t (*f) (int, void *, size_t), int fd, void *_s, size_t n,
    int (*cb)(void *, size_t), void *cb_arg)
{
	char *s = _s;
	size_t pos = 0;
	ssize_t res;
	struct pollfd pfd;

	pfd.fd = fd;
	pfd.events = f == read ? POLLIN : POLLOUT;
	while (n > pos) {
		res = (f) (fd, s + pos, n - pos);
		switch (res) {
		case -1:
			if (errno == EINTR)
				continue;
			if (errno == EAGAIN) {
				(void)poll(&pfd, 1, -1);
				continue;
			}
			return 0;
		case 0:
			errno = EPIPE;
			return pos;
		default:
			pos += (size_t)res;
			if (cb != NULL && cb(cb_arg, (size_t)res) == -1) {
				errno = EINTR;
				return pos;
			}
		}
	}
	return pos;
}

size_t
atomicio(ssize_t (*f) (int, void *, size_t), int fd, void *_s, size_t n)
{
	return atomicio6(f, fd, _s, n, NULL, NULL);
}

/*
 * ensure all of data on socket comes through. f==readv || f==writev
 */
size_t
atomiciov6(ssize_t (*f) (int, const struct iovec *, int), int fd,
    const struct iovec *_iov, int iovcnt,
    int (*cb)(void *, size_t), void *cb_arg)
{
	size_t pos = 0, rem;
	ssize_t res;
	struct iovec iov_array[IOV_MAX], *iov = iov_array;
	struct pollfd pfd;

	if (iovcnt < 0 || iovcnt > IOV_MAX) {
		errno = EINVAL;
		return 0;
	}
	/* Make a copy of the iov array because we may modify it below */
	memcpy(iov, _iov, (size_t)iovcnt * sizeof(*_iov));

	pfd.fd = fd;
	pfd.events = f == readv ? POLLIN : POLLOUT;
	for (; iovcnt > 0 && iov[0].iov_len > 0;) {
		res = (f) (fd, iov, iovcnt);
		switch (res) {
		case -1:
			if (errno == EINTR)
				continue;
			if (errno == EAGAIN) {
				(void)poll(&pfd, 1, -1);
				continue;
			}
			return 0;
		case 0:
			errno = EPIPE;
			return pos;
		default:
			rem = (size_t)res;
			pos += rem;
			/* skip completed iov entries */
			while (iovcnt > 0 && rem >= iov[0].iov_len) {
				rem -= iov[0].iov_len;
				iov++;
				iovcnt--;
			}
			/* This shouldn't happen... */
			if (rem > 0 && (iovcnt <= 0 || rem > iov[0].iov_len)) {
				errno = EFAULT;
				return 0;
			}
			if (iovcnt == 0)
				break;
			/* update pointer in partially complete iov */
			iov[0].iov_base = ((char *)iov[0].iov_base) + rem;
			iov[0].iov_len -= rem;
		}
		if (cb != NULL && cb(cb_arg, (size_t)res) == -1) {
			errno = EINTR;
			return pos;
		}
	}
	return pos;
}

size_t
atomiciov(ssize_t (*f) (int, const struct iovec *, int), int fd,
    const struct iovec *_iov, int iovcnt)
{
	return atomiciov6(f, fd, _iov, iovcnt, NULL, NULL);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: atomicio.c,v 1.28 2016/07/27 23:18:12 djm 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/uio.h>
30
31			#include <errno.h>
32			#include <poll.h>
33			#include <string.h>
34			#include <unistd.h>
35			#include <limits.h>
36
37			#include "atomicio.h"
38
39			/*
40			* ensure all of data on socket comes through. f==read \|\| f==vwrite
41			*/
42			size_t
43			atomicio6(ssize_t (f) (int, void , size_t), int fd, void *_s, size_t n,
44			int (cb)(void , size_t), void *cb_arg)
45			{
46			char *s = _s;
47			size_t pos = 0;
48			ssize_t res;
49		573878	struct pollfd pfd;
50
51		286939	pfd.fd = fd;
52		286939	pfd.events = f == read ? POLLIN : POLLOUT;
53	✓✓	1231896	while (n > pos) {
54		371079	res = (f) (fd, s + pos, n - pos);
55	✓✗✓	371079	switch (res) {
56			case -1:
57	✗✓	84140	if (errno == EINTR)
58			continue;
59	✓✗	84140	if (errno == EAGAIN) {
60		84140	(void)poll(&pfd, 1, -1);
61		84140	continue;
62			}
63			return 0;
64			case 0:
65			errno = EPIPE;
66			return pos;
67			default:
68		286939	pos += (size_t)res;
69	✓✓✗✓	401662	if (cb != NULL && cb(cb_arg, (size_t)res) == -1) {
70			errno = EINTR;
71			return pos;
72			}
73			}
74			}
75		286939	return pos;
76		286939	}
77
78			size_t
79			atomicio(ssize_t (f) (int, void , size_t), int fd, void *_s, size_t n)
80			{
81		344432	return atomicio6(f, fd, _s, n, NULL, NULL);
82			}
83
84			/*
85			* ensure all of data on socket comes through. f==readv \|\| f==writev
86			*/
87			size_t
88			atomiciov6(ssize_t (f) (int, const struct iovec , int), int fd,
89			const struct iovec *_iov, int iovcnt,
90			int (cb)(void , size_t), void *cb_arg)
91			{
92			size_t pos = 0, rem;
93			ssize_t res;
94			struct iovec iov_array[IOV_MAX], *iov = iov_array;
95			struct pollfd pfd;
96
97			if (iovcnt < 0 \|\| iovcnt > IOV_MAX) {
98			errno = EINVAL;
99			return 0;
100			}
101			/* Make a copy of the iov array because we may modify it below */
102			memcpy(iov, _iov, (size_t)iovcnt * sizeof(*_iov));
103
104			pfd.fd = fd;
105			pfd.events = f == readv ? POLLIN : POLLOUT;
106			for (; iovcnt > 0 && iov[0].iov_len > 0;) {
107			res = (f) (fd, iov, iovcnt);
108			switch (res) {
109			case -1:
110			if (errno == EINTR)
111			continue;
112			if (errno == EAGAIN) {
113			(void)poll(&pfd, 1, -1);
114			continue;
115			}
116			return 0;
117			case 0:
118			errno = EPIPE;
119			return pos;
120			default:
121			rem = (size_t)res;
122			pos += rem;
123			/* skip completed iov entries */
124			while (iovcnt > 0 && rem >= iov[0].iov_len) {
125			rem -= iov[0].iov_len;
126			iov++;
127			iovcnt--;
128			}
129			/* This shouldn't happen... */
130			if (rem > 0 && (iovcnt <= 0 \|\| rem > iov[0].iov_len)) {
131			errno = EFAULT;
132			return 0;
133			}
134			if (iovcnt == 0)
135			break;
136			/* update pointer in partially complete iov */
137			iov[0].iov_base = ((char *)iov[0].iov_base) + rem;
138			iov[0].iov_len -= rem;
139			}
140			if (cb != NULL && cb(cb_arg, (size_t)res) == -1) {
141			errno = EINTR;
142			return pos;
143			}
144			}
145			return pos;
146			}
147
148			size_t
149			atomiciov(ssize_t (f) (int, const struct iovec , int), int fd,
150			const struct iovec *_iov, int iovcnt)
151			{
152			return atomiciov6(f, fd, _iov, iovcnt, NULL, NULL);
153			}