1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
|
/* $OpenBSD: test___freading.c,v 1.2 2025/06/12 07:39:26 yasuoka Exp $ */
/*
* Copyright (c) 2025 YASUOKA Masahiko <yasuoka@yasuoka.net>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <assert.h>
#include <stdio.h>
#include <stdio_ext.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
/* we use assert() */
#undef NDEBUG
#define TMPFILENAME "test___freading.tmp"
void setup(void);
void test___freading0(void);
void test___freading1(void);
void test___freading2(void);
void
setup(void)
{
FILE *fp;
/* common setup */
unlink(TMPFILENAME);
fp = fopen(TMPFILENAME, "w+");
assert(fp != NULL);
fputs("Hello world\n", fp);
fclose(fp);
}
void
test___freading0(void)
{
FILE *fp;
int r;
char buf[80];
fp = popen("echo Hello world", "r");
assert(fp != NULL);
assert(__freading(fp) != 0);
assert(fgets(buf, sizeof(buf), fp) != NULL);
assert(strcmp(buf, "Hello world\n") == 0);
r = pclose(fp);
assert(r == 0);
}
void
test___freading1(void)
{
FILE *fp;
int r;
/* when the last operaiton is read, __freading() returns true */
fp = fopen(TMPFILENAME, "w+");
assert(fp != NULL);
assert(__freading(fp) == 0);
r = fputs("Hello world\n", fp);
assert(r >= 0);
assert(__freading(fp) == 0);
rewind(fp);
assert(fgetc(fp) == 'H');
assert(__freading(fp) != 0);
/* write */
fseek(fp, 0, SEEK_END);
r = fputs("\n", fp);
assert(__freading(fp) == 0);
/* ungetc */
rewind(fp);
assert(ungetc('X', fp) != 0);
assert(__freading(fp) != 0); /* reading */
r = fclose(fp);
assert(r == 0);
}
void
test___freading2(void)
{
int r;
FILE *fp;
/*
* until v1.10 of fpurge.c mistakenly enables the writing buffer
* without _SRD flag set.
*/
fp = fopen(TMPFILENAME, "r+");
assert(fp != NULL);
assert(fgetc(fp) == 'H');
fpurge(fp);
fseek(fp, 0, SEEK_CUR);
assert(fputc('X', fp) == 'X');
assert(__freading(fp) == 0);
r = fclose(fp);
assert(r == 0);
}
int
main(int argc, char *argv[])
{
test___freading0();
test___freading1();
test___freading2();
exit(0);
}
|
