GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libc/stdio/stdio.c Lines: 11 19 57.9 %
Date: 2017-11-13 Branches: 2 6 33.3 %

Line Branch Exec Source
1
/*	$OpenBSD: stdio.c,v 1.10 2016/09/21 04:38:56 guenther Exp $ */
2
/*-
3
 * Copyright (c) 1990, 1993
4
 *	The Regents of the University of California.  All rights reserved.
5
 *
6
 * This code is derived from software contributed to Berkeley by
7
 * Chris Torek.
8
 *
9
 * Redistribution and use in source and binary forms, with or without
10
 * modification, are permitted provided that the following conditions
11
 * are met:
12
 * 1. Redistributions of source code must retain the above copyright
13
 *    notice, this list of conditions and the following disclaimer.
14
 * 2. Redistributions in binary form must reproduce the above copyright
15
 *    notice, this list of conditions and the following disclaimer in the
16
 *    documentation and/or other materials provided with the distribution.
17
 * 3. Neither the name of the University nor the names of its contributors
18
 *    may be used to endorse or promote products derived from this software
19
 *    without specific prior written permission.
20
 *
21
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31
 * SUCH DAMAGE.
32
 */
33
34
#include <stdio.h>
35
#include <unistd.h>
36
#include "local.h"
37
38
/*
39
 * Small standard I/O/seek/close functions.
40
 * These maintain the `known seek offset' for seek optimisation.
41
 */
42
int
43
__sread(void *cookie, char *buf, int n)
44
{
45
	FILE *fp = cookie;
46
	int ret;
47
48
	ret = read(fp->_file, buf, n);
49
	/* if the read succeeded, update the current offset */
50
	if (ret >= 0)
51
		fp->_offset += ret;
52
	else
53
		fp->_flags &= ~__SOFF;	/* paranoia */
54
	return (ret);
55
}
56
57
int
58
__swrite(void *cookie, const char *buf, int n)
59
{
60
130
	FILE *fp = cookie;
61
62
65
	if (fp->_flags & __SAPP)
63
		(void) lseek(fp->_file, 0, SEEK_END);
64
65
	fp->_flags &= ~__SOFF;	/* in case FAPPEND mode is set */
65
65
	return (write(fp->_file, buf, n));
66
}
67
68
fpos_t
69
__sseek(void *cookie, fpos_t offset, int whence)
70
{
71
796
	FILE *fp = cookie;
72
	off_t ret;
73
74
398
	ret = lseek(fp->_file, offset, whence);
75
398
	if (ret == -1)
76
		fp->_flags &= ~__SOFF;
77
	else {
78
398
		fp->_flags |= __SOFF;
79
398
		fp->_offset = ret;
80
	}
81
398
	return (ret);
82
}
83
84
int
85
__sclose(void *cookie)
86
{
87
822
	return (close(((FILE *)cookie)->_file));
88
}