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f98ca075 | 1 | /* Test for some *_unlocked stdio interfaces. |
6d7e8eda | 2 | Copyright (C) 2004-2023 Free Software Foundation, Inc. |
f98ca075 | 3 | This file is part of the GNU C Library. |
f98ca075 RM |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 | 16 | License along with the GNU C Library; if not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
f98ca075 RM |
18 | |
19 | #include <stdlib.h> | |
20 | #include <stdio.h> | |
21 | #include <string.h> | |
e15f7de6 | 22 | #include <libc-diag.h> |
f98ca075 RM |
23 | |
24 | int fd; | |
25 | static void do_prepare (void); | |
26 | static int do_test (void); | |
27 | #define PREPARE(argc, argv) do_prepare () | |
28 | #define TEST_FUNCTION do_test () | |
29 | #include "../test-skeleton.c" | |
30 | ||
31 | static int | |
32 | do_test (void) | |
33 | { | |
34 | const char blah[] = "BLAH"; | |
35 | char buf[strlen (blah) + 1]; | |
36 | FILE *fp, *f; | |
37 | const char *cp; | |
38 | char *wp; | |
39 | ||
40 | if ((fp = fdopen (fd, "w+")) == NULL) | |
41 | exit (1); | |
42 | ||
43 | flockfile (fp); | |
44 | ||
45 | f = fp; | |
46 | cp = blah; | |
c81e9deb JM |
47 | /* These tests deliberately use fwrite_unlocked with the size |
48 | argument specified as 0, which results in "division by zero" | |
49 | warnings from the expansion of that macro (in code that is not | |
50 | evaluated for a size of 0). This applies to the tests of | |
51 | fread_unlocked below as well. */ | |
52 | DIAG_PUSH_NEEDS_COMMENT; | |
53 | DIAG_IGNORE_NEEDS_COMMENT (4.9, "-Wdiv-by-zero"); | |
f98ca075 RM |
54 | if (ftello (fp) != 0 |
55 | || fwrite_unlocked (blah, blah - blah, strlen (blah), f++) != 0 | |
56 | || f != fp + 1 | |
57 | || fwrite_unlocked ("", 5.0, 0, --f) != 0 | |
58 | || f != fp | |
59 | || fwrite_unlocked (cp++, 16, 0.25, fp) != 0 | |
60 | || cp != blah + 1 | |
61 | || fwrite_unlocked (--cp, 0.25, 16, fp) != 0 | |
62 | || cp != blah | |
63 | || fwrite_unlocked (blah, 0, -0.0, fp) != 0 | |
64 | || ftello (fp) != 0) | |
65 | { | |
66 | puts ("One of fwrite_unlocked tests failed"); | |
67 | exit (1); | |
68 | } | |
c81e9deb | 69 | DIAG_POP_NEEDS_COMMENT; |
f98ca075 RM |
70 | |
71 | if (fwrite_unlocked (blah, 1, strlen (blah) - 2, fp) != strlen (blah) - 2) | |
72 | { | |
73 | puts ("Could not write string into file"); | |
74 | exit (1); | |
75 | } | |
76 | ||
77 | if (putc_unlocked ('A' + 0x1000000, fp) != 'A') | |
78 | { | |
79 | puts ("putc_unlocked failed"); | |
80 | exit (1); | |
81 | } | |
82 | ||
83 | f = fp; | |
84 | cp = blah + strlen (blah) - 1; | |
85 | if (putc_unlocked (*cp++, f++) != 'H' | |
86 | || f != fp + 1 | |
87 | || cp != strchr (blah, '\0')) | |
88 | { | |
89 | puts ("fputc_unlocked failed"); | |
90 | exit (1); | |
91 | } | |
92 | ||
93 | if (ftello (fp) != (off_t) strlen (blah)) | |
94 | { | |
95 | printf ("Failed to write %zd bytes to temporary file", strlen (blah)); | |
96 | exit (1); | |
97 | } | |
98 | ||
99 | rewind (fp); | |
100 | ||
101 | f = fp; | |
102 | wp = buf; | |
103 | memset (buf, ' ', sizeof (buf)); | |
c81e9deb JM |
104 | /* See explanation above. */ |
105 | DIAG_PUSH_NEEDS_COMMENT; | |
106 | DIAG_IGNORE_NEEDS_COMMENT (4.9, "-Wdiv-by-zero"); | |
f98ca075 RM |
107 | if (ftello (fp) != 0 |
108 | || fread_unlocked (buf, buf - buf, strlen (blah), f++) != 0 | |
109 | || f != fp + 1 | |
110 | || fread_unlocked (buf, 5.0, 0, --f) != 0 | |
111 | || f != fp | |
112 | || fread_unlocked (wp++, 16, 0.25, fp) != 0 | |
113 | || wp != buf + 1 | |
114 | || fread_unlocked (--wp, 0.25, 16, fp) != 0 | |
115 | || wp != buf | |
116 | || fread_unlocked (buf, 0, -0.0, fp) != 0 | |
117 | || ftello (fp) != 0 | |
118 | || memcmp (buf, " ", sizeof (buf)) != 0) | |
119 | { | |
120 | puts ("One of fread_unlocked tests failed"); | |
121 | exit (1); | |
122 | } | |
c81e9deb | 123 | DIAG_POP_NEEDS_COMMENT; |
f98ca075 RM |
124 | |
125 | if (fread_unlocked (buf, 1, strlen (blah) - 2, fp) != strlen (blah) - 2) | |
126 | { | |
127 | puts ("Could not read string from file"); | |
128 | exit (1); | |
129 | } | |
130 | ||
131 | if (getc_unlocked (fp) != 'A') | |
132 | { | |
133 | puts ("getc_unlocked failed"); | |
134 | exit (1); | |
135 | } | |
136 | ||
137 | f = fp; | |
138 | if (fgetc_unlocked (f++) != 'H' | |
139 | || f != fp + 1 | |
140 | || fgetc_unlocked (--f) != EOF | |
141 | || f != fp) | |
142 | { | |
143 | puts ("fgetc_unlocked failed"); | |
144 | exit (1); | |
145 | } | |
146 | ||
147 | if (ftello (fp) != (off_t) strlen (blah)) | |
148 | { | |
149 | printf ("Failed to read %zd bytes from temporary file", strlen (blah)); | |
150 | exit (1); | |
151 | } | |
152 | ||
153 | funlockfile (fp); | |
154 | fclose (fp); | |
155 | ||
156 | return 0; | |
157 | } | |
158 | ||
159 | static void | |
160 | do_prepare (void) | |
161 | { | |
162 | fd = create_temp_file ("tst-unlockedio.", NULL); | |
163 | if (fd == -1) | |
164 | { | |
165 | printf ("cannot create temporary file: %m\n"); | |
166 | exit (1); | |
167 | } | |
168 | } |