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-rw-r--r--src/regress/lib/libc/stdio/Makefile29
-rw-r--r--src/regress/lib/libc/stdio/test___fpending.c58
-rw-r--r--src/regress/lib/libc/stdio/test___freadahead.c71
-rw-r--r--src/regress/lib/libc/stdio/test___freading.c125
-rw-r--r--src/regress/lib/libc/stdio/test___freadptr.c78
-rw-r--r--src/regress/lib/libc/stdio/test___fseterr.c60
-rw-r--r--src/regress/lib/libc/stdio/test___fwriting.c83
-rw-r--r--src/regress/lib/libc/stdio/test_fflush.c345
-rw-r--r--src/regress/lib/libc/stdio/test_ungetwc.c90
9 files changed, 939 insertions, 0 deletions
diff --git a/src/regress/lib/libc/stdio/Makefile b/src/regress/lib/libc/stdio/Makefile
new file mode 100644
index 0000000000..f1e980f688
--- /dev/null
+++ b/src/regress/lib/libc/stdio/Makefile
@@ -0,0 +1,29 @@
1# $OpenBSD: Makefile,v 1.4 2025/06/03 14:35:27 yasuoka Exp $
2
3PROGS= test_fflush
4CLEANFILES= test_fflush.tmp
5
6PROGS+= test_ungetwc
7CLEANFILES+= test_ungetwc.tmp
8
9PROGS+= test___freading
10CLEANFILES+= test___freading.tmp
11
12PROGS+= test___fwriting
13CLEANFILES+= test___fwriting.tmp
14
15PROGS+= test___fpending
16CLEANFILES+= test___fpending.tmp
17
18PROGS+= test___freadahead
19CLEANFILES+= test___freadahead.tmp
20
21PROGS+= test___freadptr
22CLEANFILES+= test___freadptr.tmp
23
24PROGS+= test___fseterr
25CLEANFILES+= test___fseterr.tmp
26
27WARNINGS= yes
28
29.include <bsd.regress.mk>
diff --git a/src/regress/lib/libc/stdio/test___fpending.c b/src/regress/lib/libc/stdio/test___fpending.c
new file mode 100644
index 0000000000..96ace2e481
--- /dev/null
+++ b/src/regress/lib/libc/stdio/test___fpending.c
@@ -0,0 +1,58 @@
1/* $OpenBSD: test___fpending.c,v 1.1 2025/05/25 00:20:54 yasuoka Exp $ */
2
3/*
4 * Copyright (c) 2025 YASUOKA Masahiko <yasuoka@yasuoka.net>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19#include <assert.h>
20#include <stdio.h>
21#include <stdio_ext.h>
22#include <stdlib.h>
23
24/* we use assert() */
25#undef NDEBUG
26
27#define TMPFILENAME "test___fpending.tmp"
28
29void test___fpending0(void);
30
31void
32test___fpending0(void)
33{
34 FILE *fp;
35 int r;
36 size_t s;
37
38 fp = fopen(TMPFILENAME, "w");
39 assert(fp != NULL);
40 r = fputs("Hello world", fp);
41 assert(r >= 0);
42 s = __fpending(fp);
43 assert(s > 0); /* assume buffered */
44 r = fflush(fp);
45 assert(r == 0);
46 s = __fpending(fp);
47 assert(s == 0); /* buffer must be 0 */
48 r = fclose(fp);
49 assert(r == 0);
50}
51
52int
53main(int argc, char *argv[])
54{
55 test___fpending0();
56
57 exit(0);
58}
diff --git a/src/regress/lib/libc/stdio/test___freadahead.c b/src/regress/lib/libc/stdio/test___freadahead.c
new file mode 100644
index 0000000000..66d5e3492a
--- /dev/null
+++ b/src/regress/lib/libc/stdio/test___freadahead.c
@@ -0,0 +1,71 @@
1/* $OpenBSD: test___freadahead.c,v 1.2 2025/06/03 14:35:27 yasuoka Exp $ */
2
3/*
4 * Copyright (c) 2025 YASUOKA Masahiko <yasuoka@yasuoka.net>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19#include <assert.h>
20#include <errno.h>
21#include <stdio.h>
22#include <stdio_ext.h>
23#include <stdlib.h>
24
25/* we use assert() */
26#undef NDEBUG
27
28#define TMPFILENAME "test___freadahead.tmp"
29
30void test___freadahead0(void);
31
32void
33test___freadahead0(void)
34{
35 FILE *fp;
36 int r;
37 size_t s;
38
39 fp = fopen(TMPFILENAME, "w");
40 assert(fp != NULL);
41 r = fputs("Hello world", fp);
42 assert(r >= 0);
43 r = fclose(fp);
44
45 fp = fopen(TMPFILENAME, "r");
46 s = __freadahead(fp);
47 assert(s == 0);
48 assert(fgetc(fp) == 'H');
49 s = __freadahead(fp);
50 assert(s == 10);
51 r = fflush(fp);
52#if 0
53 /* fflush() to reading file is not supported (yet) */
54 assert(errno == EBADF);
55#else
56 assert(r == 0);
57 s = __freadahead(fp);
58 assert(s == 0);
59#endif
60
61 r = fclose(fp);
62 assert(r == 0);
63}
64
65int
66main(int argc, char *argv[])
67{
68 test___freadahead0();
69
70 exit(0);
71}
diff --git a/src/regress/lib/libc/stdio/test___freading.c b/src/regress/lib/libc/stdio/test___freading.c
new file mode 100644
index 0000000000..f74eb78d35
--- /dev/null
+++ b/src/regress/lib/libc/stdio/test___freading.c
@@ -0,0 +1,125 @@
1/* $OpenBSD: test___freading.c,v 1.2 2025/06/12 07:39:26 yasuoka Exp $ */
2
3/*
4 * Copyright (c) 2025 YASUOKA Masahiko <yasuoka@yasuoka.net>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19#include <assert.h>
20#include <stdio.h>
21#include <stdio_ext.h>
22#include <stdlib.h>
23#include <string.h>
24#include <unistd.h>
25
26/* we use assert() */
27#undef NDEBUG
28
29#define TMPFILENAME "test___freading.tmp"
30
31void setup(void);
32
33void test___freading0(void);
34void test___freading1(void);
35void test___freading2(void);
36
37void
38setup(void)
39{
40 FILE *fp;
41
42 /* common setup */
43 unlink(TMPFILENAME);
44 fp = fopen(TMPFILENAME, "w+");
45 assert(fp != NULL);
46 fputs("Hello world\n", fp);
47 fclose(fp);
48}
49
50void
51test___freading0(void)
52{
53 FILE *fp;
54 int r;
55 char buf[80];
56
57 fp = popen("echo Hello world", "r");
58 assert(fp != NULL);
59 assert(__freading(fp) != 0);
60 assert(fgets(buf, sizeof(buf), fp) != NULL);
61 assert(strcmp(buf, "Hello world\n") == 0);
62 r = pclose(fp);
63 assert(r == 0);
64}
65
66void
67test___freading1(void)
68{
69 FILE *fp;
70 int r;
71
72 /* when the last operaiton is read, __freading() returns true */
73 fp = fopen(TMPFILENAME, "w+");
74 assert(fp != NULL);
75 assert(__freading(fp) == 0);
76 r = fputs("Hello world\n", fp);
77 assert(r >= 0);
78 assert(__freading(fp) == 0);
79 rewind(fp);
80 assert(fgetc(fp) == 'H');
81 assert(__freading(fp) != 0);
82 /* write */
83 fseek(fp, 0, SEEK_END);
84 r = fputs("\n", fp);
85 assert(__freading(fp) == 0);
86 /* ungetc */
87 rewind(fp);
88 assert(ungetc('X', fp) != 0);
89 assert(__freading(fp) != 0); /* reading */
90
91 r = fclose(fp);
92 assert(r == 0);
93}
94
95void
96test___freading2(void)
97{
98 int r;
99 FILE *fp;
100
101 /*
102 * until v1.10 of fpurge.c mistakenly enables the writing buffer
103 * without _SRD flag set.
104 */
105 fp = fopen(TMPFILENAME, "r+");
106 assert(fp != NULL);
107 assert(fgetc(fp) == 'H');
108 fpurge(fp);
109 fseek(fp, 0, SEEK_CUR);
110 assert(fputc('X', fp) == 'X');
111 assert(__freading(fp) == 0);
112
113 r = fclose(fp);
114 assert(r == 0);
115}
116
117int
118main(int argc, char *argv[])
119{
120 test___freading0();
121 test___freading1();
122 test___freading2();
123
124 exit(0);
125}
diff --git a/src/regress/lib/libc/stdio/test___freadptr.c b/src/regress/lib/libc/stdio/test___freadptr.c
new file mode 100644
index 0000000000..cce362f2ae
--- /dev/null
+++ b/src/regress/lib/libc/stdio/test___freadptr.c
@@ -0,0 +1,78 @@
1/* $OpenBSD: test___freadptr.c,v 1.1 2025/05/25 00:20:54 yasuoka Exp $ */
2
3/*
4 * Copyright (c) 2025 YASUOKA Masahiko <yasuoka@yasuoka.net>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19#include <sys/types.h>
20#include <assert.h>
21#include <stdio.h>
22#include <stdio_ext.h>
23#include <stdlib.h>
24#include <string.h>
25
26/* we use assert() */
27#undef NDEBUG
28
29#define TMPFILENAME "test___freadptr.tmp"
30
31void test___freadptr0(void);
32
33/* test __freadptr() and __freadptrinc() */
34void
35test___freadptr0(void)
36{
37 FILE *fp;
38 int r;
39 ssize_t s;
40 const char *p;
41
42 fp = fopen(TMPFILENAME, "w");
43 assert(fp != NULL);
44 r = fputs("Hello world", fp);
45 assert(r >= 0);
46 r = fclose(fp);
47
48 fp = fopen(TMPFILENAME, "r");
49 assert(fgetc(fp) == 'H');
50 p = __freadptr(fp, &s);
51 assert(p != NULL);
52 assert(s > 4); /* this test assume this (not by the spec) */
53 assert(*p == 'e');
54 assert(strncmp(p, "ello world", s) == 0);
55
56 __freadptrinc(fp, 4);
57 assert(fgetc(fp) == ' ');
58
59 ungetc('A', fp);
60 ungetc('A', fp);
61 ungetc('A', fp);
62 p = __freadptr(fp, &s);
63 assert(s > 0);
64 assert(*p == 'A');
65 /* ptr will contains only the pushback buffer */
66 assert(strncmp(p, "AAAworld", s) == 0);
67
68 r = fclose(fp);
69 assert(r == 0);
70}
71
72int
73main(int argc, char *argv[])
74{
75 test___freadptr0();
76
77 exit(0);
78}
diff --git a/src/regress/lib/libc/stdio/test___fseterr.c b/src/regress/lib/libc/stdio/test___fseterr.c
new file mode 100644
index 0000000000..70fb491c6c
--- /dev/null
+++ b/src/regress/lib/libc/stdio/test___fseterr.c
@@ -0,0 +1,60 @@
1/* $OpenBSD: test___fseterr.c,v 1.1 2025/05/25 00:20:54 yasuoka Exp $ */
2
3/*
4 * Copyright (c) 2025 YASUOKA Masahiko <yasuoka@yasuoka.net>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19#include <assert.h>
20#include <stdio.h>
21#include <stdio_ext.h>
22#include <stdlib.h>
23
24/* we use assert() */
25#undef NDEBUG
26
27#define TMPFILENAME "test___fseterr.tmp"
28
29void test___fseterr0(void);
30
31void
32test___fseterr0(void)
33{
34 FILE *fp;
35 int r;
36
37 fp = fopen(TMPFILENAME, "w+");
38 assert(fp != NULL);
39
40 assert(!ferror(fp));
41
42 r = fprintf(fp, "hello world\n");
43 assert(r > 0);
44
45 __fseterr(fp);
46 assert(ferror(fp));
47
48 r = fprintf(fp, "hello world\n");
49 assert(r == -1);
50
51 fclose(fp);
52}
53
54int
55main(int argc, char *argv[])
56{
57 test___fseterr0();
58
59 exit(0);
60}
diff --git a/src/regress/lib/libc/stdio/test___fwriting.c b/src/regress/lib/libc/stdio/test___fwriting.c
new file mode 100644
index 0000000000..eb4671d3cf
--- /dev/null
+++ b/src/regress/lib/libc/stdio/test___fwriting.c
@@ -0,0 +1,83 @@
1/* $OpenBSD: test___fwriting.c,v 1.1 2025/05/25 00:20:54 yasuoka Exp $ */
2
3/*
4 * Copyright (c) 2025 YASUOKA Masahiko <yasuoka@yasuoka.net>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19#include <assert.h>
20#include <stdio.h>
21#include <stdio_ext.h>
22#include <stdlib.h>
23
24/* we use assert() */
25#undef NDEBUG
26
27#define TMPFILENAME "test___fwriting.tmp"
28
29void test___fwriting0(void);
30void test___fwriting1(void);
31
32void
33test___fwriting0(void)
34{
35 FILE *fp;
36 int r;
37
38 fp = fopen(TMPFILENAME, "w"); /* write only */
39 assert(fp != NULL);
40 assert(__fwriting(fp) != 0); /* writing is true immediately */
41 r = fputs("Hello world\n", fp);
42 assert(r >= 0);
43 r = fclose(fp);
44 assert(r == 0);
45
46 fp = fopen(TMPFILENAME, "a"); /* append only */
47 assert(fp != NULL);
48 assert(__fwriting(fp) != 0); /* writing immediately */
49 r = fclose(fp);
50 assert(r == 0);
51}
52
53void
54test___fwriting1(void)
55{
56 FILE *fp;
57 int r;
58
59 fp = fopen(TMPFILENAME, "w+"); /* read / write */
60 assert(fp != NULL);
61 r = fputs("Hello world\n", fp);
62 assert(r >= 0);
63 assert(__fwriting(fp) != 0);
64 rewind(fp);
65 assert(fgetc(fp) == 'H'); /* read */
66 assert(__fwriting(fp) == 0); /* writing becomes false */
67 fputc('e', fp);
68 assert(__fwriting(fp) != 0); /* writing becomes true */
69 ungetc('e', fp);
70 assert(__fwriting(fp) == 0); /* ungetc -> writing becomes false */
71
72 r = fclose(fp);
73 assert(r == 0);
74}
75
76int
77main(int argc, char *argv[])
78{
79 test___fwriting0();
80 test___fwriting1();
81
82 exit(0);
83}
diff --git a/src/regress/lib/libc/stdio/test_fflush.c b/src/regress/lib/libc/stdio/test_fflush.c
new file mode 100644
index 0000000000..a0586b7d14
--- /dev/null
+++ b/src/regress/lib/libc/stdio/test_fflush.c
@@ -0,0 +1,345 @@
1/* $OpenBSD: test_fflush.c,v 1.3 2025/06/08 08:53:53 yasuoka Exp $ */
2
3/*
4 * Copyright (c) 2025 YASUOKA Masahiko <yasuoka@yasuoka.net>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19#include <assert.h>
20#include <locale.h>
21#include <stdio.h>
22#include <stdlib.h>
23#include <string.h>
24#include <unistd.h>
25#include <wchar.h>
26
27/* we use assert() */
28#undef NDEBUG
29
30#define TMPFILENAME "test_fflush.tmp"
31
32void setup(void);
33
34void test_fflush_read0(void);
35void test_fflush_read1(void);
36void test_fflush_read2(void);
37void test_fflush_read3(void);
38void test_fflush_read4(void);
39void setupw(void);
40void test_fflush_read5(void);
41void test_fflush_read6(void);
42
43void
44setup(void)
45{
46 FILE *fp;
47
48 /* common setup */
49 unlink(TMPFILENAME);
50 fp = fopen(TMPFILENAME, "w+");
51 assert(fp != NULL);
52 fputs("Hello world\n", fp);
53 fclose(fp);
54}
55
56/* fflush work with reading file and seekable */
57void
58test_fflush_read0(void)
59{
60 int r;
61 char buf[80];
62 FILE *fp;
63
64 setup();
65
66 /* In POSIX 2008, fflush() must work with the file object for reading */
67 fp = fopen(TMPFILENAME, "r");
68 assert(fp != NULL);
69 assert(fgetc(fp) == 'H');
70 r = fflush(fp);
71 assert(r == 0);
72
73 /* the position is moved to 1 */
74 assert(ftell(fp) == 1);
75
76 /* can read rest of that */
77 fgets(buf, sizeof(buf), fp);
78 assert(strcmp(buf, "ello world\n") == 0);
79 r = fclose(fp);
80 assert(r == 0);
81}
82
83/* fflush work with reading file and seekable + unget */
84void
85test_fflush_read1(void)
86{
87 int r;
88 char buf[80];
89 FILE *fp;
90
91 setup();
92
93 fp = fopen(TMPFILENAME, "r");
94 assert(fp != NULL);
95 assert(fgetc(fp) == 'H');
96 assert(fgetc(fp) == 'e');
97 assert(fgetc(fp) == 'l');
98 assert(fgetc(fp) == 'l');
99 assert(fgetc(fp) == 'o');
100
101 /* push the 'AAAA' back */
102 ungetc('A', fp);
103 ungetc('A', fp);
104 ungetc('A', fp);
105 ungetc('A', fp);
106
107 /* can read rest of that */
108 fgets(buf, sizeof(buf), fp);
109 assert(strcmp(buf, "AAAA world\n") == 0);
110 r = fclose(fp);
111 assert(r == 0);
112
113 /* do the same thing + fflush */
114
115 fp = fopen(TMPFILENAME, "r");
116 assert(fp != NULL);
117 assert(fgetc(fp) == 'H');
118 assert(fgetc(fp) == 'e');
119 assert(fgetc(fp) == 'l');
120 assert(fgetc(fp) == 'l');
121 assert(fgetc(fp) == 'o');
122
123 /* push 'AAAA' back */
124 ungetc('A', fp);
125 ungetc('A', fp);
126 ungetc('A', fp);
127 ungetc('A', fp);
128
129 /* then fflush */
130 r = fflush(fp);
131 assert(r == 0);
132
133 /* fllush() clears the all pushed back chars */
134
135 /* can read rest of that */
136 fgets(buf, sizeof(buf), fp);
137 assert(strcmp(buf, " world\n") == 0);
138 r = fclose(fp);
139 assert(r == 0);
140}
141
142/* fflush() to reading and non-seekable stream */
143void
144test_fflush_read2(void)
145{
146 int r;
147 FILE *fp;
148 char buf[80];
149
150 /* In POSIX-2008, fflush() must work with the file object for reading */
151 fp = popen("echo Hello world", "r");
152 assert(fp != NULL);
153 assert(fgetc(fp) == 'H');
154 r = fflush(fp);
155 assert(r == 0);
156
157 /*
158 * FILE object for read and NOT seekable. In that case, fflush does
159 * nothing, but must keep the buffer.
160 */
161
162 /* can read rest of that */
163 fgets(buf, sizeof(buf), fp);
164 assert(strcmp(buf, "ello world\n") == 0);
165 r = pclose(fp);
166 assert(r == 0);
167}
168
169/* fflush() to the file which doesn't have any buffer */
170void
171test_fflush_read3(void)
172{
173 int r;
174 FILE *fp;
175
176 setup();
177
178 /* In POSIX-2008, fflush() must work with the file object for reading */
179 fp = fopen(TMPFILENAME, "r");
180 assert(fp != NULL);
181 r = fflush(fp);
182 assert(r == 0);
183 r = fclose(fp);
184 assert(r == 0);
185}
186
187/* freopen() should call fflush() internal */
188void
189test_fflush_read4(void)
190{
191 int r;
192 FILE *fp;
193 off_t pos;
194 char buf[80];
195
196 setup();
197
198 /* In POSIX-2008, fflush() must work with the file object for reading */
199 fp = fopen(TMPFILENAME, "r");
200 assert(fp != NULL);
201
202 assert(fgetc(fp) == 'H'); /* read 1 */
203
204 pos = lseek(fileno(fp), 0, SEEK_CUR);
205 assert(pos >= 1);
206 assert(pos > 1); /* this test assume the buffer is used */
207
208 /* freopen() should call fflush() internal */
209 fp = freopen(TMPFILENAME, "r", fp);
210 assert(fp != NULL);
211
212 /* can read rest of that on fp */
213 fgets(buf, sizeof(buf), fp);
214 assert(strcmp(buf, "Hello world\n") == 0);
215
216 r = fclose(fp);
217 assert(r == 0);
218}
219
220void
221setupw(void)
222{
223 FILE *fp;
224
225 /* common setup */
226 unlink(TMPFILENAME);
227 fp = fopen(TMPFILENAME, "w+");
228 assert(fp != NULL);
229 /* Konnitiwa Sekai(in Kanji) */
230 fputws(L"\u3053\u3093\u306b\u3061\u308f \u4e16\u754c\n", fp);
231 fclose(fp);
232}
233
234/* fflush work with reading file and seekable + ungetwc */
235void
236test_fflush_read5(void)
237{
238 int r;
239 wchar_t buf[80];
240 FILE *fp;
241
242 setupw();
243
244 fp = fopen(TMPFILENAME, "r");
245
246 assert(fp != NULL);
247 assert(fgetwc(fp) == L'\u3053'); /* Ko */
248 assert(fgetwc(fp) == L'\u3093'); /* N */
249 assert(fgetwc(fp) == L'\u306b'); /* Ni */
250 assert(fgetwc(fp) == L'\u3061'); /* Ti */
251 assert(fgetwc(fp) == L'\u308f'); /* Wa */
252
253 /* push 263A(smile) back */
254 assert(ungetwc(L'\u263a', fp));
255
256 /* we support 1 push back wchar_t */
257 assert(fgetwc(fp) == L'\u263a');
258
259 /* can read reset of that */
260 fgetws(buf, sizeof(buf), fp);
261 assert(wcscmp(buf, L" \u4e16\u754c\n") == 0);
262
263 r = fclose(fp);
264 assert(r == 0);
265
266 /* do the same thing + fflush */
267 fp = fopen(TMPFILENAME, "r");
268
269 assert(fp != NULL);
270 assert(fgetwc(fp) == L'\u3053'); /* Ko */
271 assert(fgetwc(fp) == L'\u3093'); /* N */
272 assert(fgetwc(fp) == L'\u306b'); /* Ni */
273 assert(fgetwc(fp) == L'\u3061'); /* Ti */
274 assert(fgetwc(fp) == L'\u308f'); /* Wa */
275
276 /* push 263A(smile) back */
277 assert(ungetwc(L'\u263a', fp));
278
279 /* we support 1 push back wchar_t */
280 assert(fgetwc(fp) == L'\u263a');
281
282 /* then fflush */
283 r = fflush(fp);
284 assert(r == 0);
285
286 /* fllush() clears the all pushed back chars */
287
288 /* can read rest of that */
289 fgetws(buf, sizeof(buf), fp);
290 assert(wcscmp(buf, L" \u4e16\u754c\n") == 0);
291 r = fclose(fp);
292 assert(r == 0);
293}
294
295void
296test_fflush_read6(void)
297{
298 int r, c;
299 FILE *fp;
300
301 setup();
302 fp = fopen(TMPFILENAME, "r");
303 assert(fp != NULL);
304
305 /*
306 * https://pubs.opengroup.org/onlinepubs/9699919799/functions/fflush.html
307 * .. any characters pushed back onto the stream by ungetc() or ungetwc()
308 * that have not subsequently been read from the stream shall be discarded
309 * (without further changing the file offset).
310 */
311
312 assert(fgetc(fp) == 'H');
313 c = getc(fp);
314 ungetc(c, fp); /* push back the character has been read */
315 r = fflush(fp);
316 assert(r == 0);
317 assert(getc(fp) == c);
318
319 fseek(fp, 0, SEEK_SET);
320 assert(fgetc(fp) == 'H');
321 c = getc(fp);
322 ungetc('X', fp); /* push back the character has not been read */
323 r = fflush(fp);
324 assert(r == 0);
325 assert(getc(fp) == 'l');
326
327 r = fclose(fp);
328 assert(r == 0);
329}
330
331int
332main(int argc, char *argv[])
333{
334 setlocale(LC_ALL, "C.UTF-8");
335
336 test_fflush_read0();
337 test_fflush_read1();
338 test_fflush_read2();
339 test_fflush_read3();
340 test_fflush_read4();
341 test_fflush_read5();
342 test_fflush_read6();
343
344 exit(0);
345}
diff --git a/src/regress/lib/libc/stdio/test_ungetwc.c b/src/regress/lib/libc/stdio/test_ungetwc.c
new file mode 100644
index 0000000000..bb4e853020
--- /dev/null
+++ b/src/regress/lib/libc/stdio/test_ungetwc.c
@@ -0,0 +1,90 @@
1/* $OpenBSD: test_ungetwc.c,v 1.1 2025/05/25 05:32:45 yasuoka Exp $ */
2
3/*
4 * Copyright (c) 2025 YASUOKA Masahiko <yasuoka@yasuoka.net>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19#include <assert.h>
20#include <stdio.h>
21#include <stdlib.h>
22#include <string.h>
23#include <unistd.h>
24#include <locale.h>
25#include <wchar.h>
26
27/* we use assert() */
28#undef NDEBUG
29
30#define TMPFILENAME "test_ungetwc.tmp"
31
32void setupw(void);
33void test_fflush_ungetwc0(void);
34
35void
36setupw(void)
37{
38 FILE *fp;
39
40 /* common setup */
41 unlink(TMPFILENAME);
42 fp = fopen(TMPFILENAME, "w+");
43 assert(fp != NULL);
44 /* Konnitiwa Sekai(in Kanji) */
45 fputws(L"\u3053\u3093\u306b\u3061\u308f \u4e16\u754c\n", fp);
46 fclose(fp);
47}
48
49/* fflush work with reading file and seekable + ungetwc */
50void
51test_fflush_ungetwc0(void)
52{
53 int r;
54 wchar_t buf[80];
55 FILE *fp;
56
57 setupw();
58
59 fp = fopen(TMPFILENAME, "r");
60
61 assert(fp != NULL);
62 assert(fgetwc(fp) == L'\u3053'); /* Ko */
63 assert(fgetwc(fp) == L'\u3093'); /* N */
64 assert(fgetwc(fp) == L'\u306b'); /* Ni */
65 assert(fgetwc(fp) == L'\u3061'); /* Ti */
66 assert(fgetwc(fp) == L'\u308f'); /* Wa */
67
68 /* push 263A(smile) back */
69 assert(ungetwc(L'\u263a', fp));
70
71 /* we support 1 push back wchar_t */
72 assert(fgetwc(fp) == L'\u263a');
73
74 /* can read reset of that */
75 fgetws(buf, sizeof(buf), fp);
76 assert(wcscmp(buf, L" \u4e16\u754c\n") == 0);
77
78 r = fclose(fp);
79 assert(r == 0);
80}
81
82int
83main(int argc, char *argv[])
84{
85 setlocale(LC_ALL, "C.UTF-8");
86
87 test_fflush_ungetwc0();
88
89 exit(0);
90}
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