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af83568d | 1 | /* basic fmemopen interface testing. |
dff8da6b | 2 | Copyright (C) 2014-2024 Free Software Foundation, Inc. |
af83568d AZ |
3 | This file is part of the GNU C Library. |
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 | |
16 | License along with the GNU C Library; if not, see | |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
af83568d | 18 | |
de153e7f UD |
19 | #include <errno.h> |
20 | #include <fcntl.h> | |
21 | #include <stdio.h> | |
22 | #include <stdlib.h> | |
23 | #include <string.h> | |
24 | #include <unistd.h> | |
25 | #include <sys/mman.h> | |
26 | #include <sys/stat.h> | |
27 | #include <sys/types.h> | |
28 | ||
af83568d AZ |
29 | static char *test_file; |
30 | ||
31 | static void | |
32 | do_prepare (int argc, char *argv[]) | |
33 | { | |
34 | /* Construct the test file name based on ARGV[0], which will be | |
35 | an absolute file name in the build directory. Don't touch the | |
36 | source directory, which might be read-only. */ | |
37 | if (asprintf (&test_file, "%s.test", argv[0]) < 0) | |
38 | { | |
39 | puts ("asprintf failed\n"); | |
40 | exit (EXIT_FAILURE); | |
41 | } | |
42 | } | |
43 | ||
44 | static int | |
45 | do_test (void) | |
de153e7f UD |
46 | { |
47 | const char blah[] = "BLAH"; | |
48 | FILE *fp; | |
49 | char *mmap_data; | |
50 | int ch, fd; | |
51 | struct stat fs; | |
52 | const char *cp; | |
53 | ||
54 | /* setup the physical file, and use it */ | |
c98d4212 | 55 | if ((fp = fopen (test_file, "w+")) == NULL) |
af83568d | 56 | return 1; |
de153e7f | 57 | if (fwrite (blah, 1, strlen (blah), fp) != strlen (blah)) |
af83568d AZ |
58 | { |
59 | fclose (fp); | |
60 | return 2; | |
61 | } | |
de153e7f UD |
62 | |
63 | rewind (fp); | |
64 | printf ("file: "); | |
65 | cp = blah; | |
66 | while ((ch = getc (fp)) != EOF) | |
67 | { | |
68 | fputc (ch, stdout); | |
69 | if (ch != *cp) | |
70 | { | |
59553897 | 71 | printf ("\ncharacter %td: '%c' instead of '%c'\n", |
de153e7f | 72 | cp - blah, ch, *cp); |
af83568d AZ |
73 | fclose (fp); |
74 | return 1; | |
de153e7f UD |
75 | } |
76 | ++cp; | |
77 | } | |
78 | fputc ('\n', stdout); | |
79 | if (ferror (fp)) | |
80 | { | |
81 | puts ("fp: error"); | |
af83568d AZ |
82 | fclose (fp); |
83 | return 1; | |
de153e7f UD |
84 | } |
85 | if (feof (fp)) | |
86 | printf ("fp: EOF\n"); | |
87 | else | |
88 | { | |
89 | puts ("not EOF"); | |
af83568d AZ |
90 | fclose (fp); |
91 | return 1; | |
de153e7f UD |
92 | } |
93 | fclose (fp); | |
94 | ||
95 | /* Now, mmap the file into a buffer, and do that too */ | |
c98d4212 | 96 | if ((fd = open (test_file, O_RDONLY)) == -1) |
af83568d AZ |
97 | { |
98 | printf ("open (%s, O_RDONLY) failed\n", test_file); | |
99 | return 3; | |
100 | } | |
de153e7f | 101 | if (fstat (fd, &fs) == -1) |
af83568d AZ |
102 | { |
103 | printf ("stat (%i)\n", fd); | |
104 | return 4; | |
105 | } | |
de153e7f UD |
106 | |
107 | if ((mmap_data = (char *) mmap (NULL, fs.st_size, PROT_READ, | |
7c11c4a1 | 108 | MAP_SHARED, fd, 0)) == MAP_FAILED) |
de153e7f | 109 | { |
af83568d | 110 | printf ("mmap (NULL, %zu, PROT_READ, MAP_SHARED, %i, 0) failed\n", |
d88548f4 | 111 | (size_t) fs.st_size, fd); |
af83568d | 112 | return 5; |
de153e7f UD |
113 | } |
114 | ||
115 | if ((fp = fmemopen (mmap_data, fs.st_size, "r")) == NULL) | |
af83568d | 116 | { |
d88548f4 | 117 | printf ("fmemopen (%p, %zu) failed\n", mmap_data, (size_t) fs.st_size); |
af83568d AZ |
118 | return 1; |
119 | } | |
de153e7f UD |
120 | |
121 | printf ("mem: "); | |
122 | cp = blah; | |
123 | while ((ch = getc (fp)) != EOF) | |
124 | { | |
125 | fputc (ch, stdout); | |
126 | if (ch != *cp) | |
127 | { | |
59553897 | 128 | printf ("%td character: '%c' instead of '%c'\n", |
de153e7f | 129 | cp - blah, ch, *cp); |
af83568d AZ |
130 | fclose (fp); |
131 | return 1; | |
de153e7f UD |
132 | } |
133 | ++cp; | |
134 | } | |
135 | ||
136 | fputc ('\n', stdout); | |
137 | ||
138 | if (ferror (fp)) | |
139 | { | |
140 | puts ("fp: error"); | |
af83568d AZ |
141 | fclose (fp); |
142 | return 1; | |
de153e7f UD |
143 | } |
144 | if (feof (fp)) | |
145 | printf ("fp: EOF\n"); | |
146 | else | |
147 | { | |
148 | puts ("not EOF"); | |
af83568d AZ |
149 | fclose (fp); |
150 | return 1; | |
de153e7f UD |
151 | } |
152 | ||
153 | fclose (fp); | |
154 | ||
155 | munmap (mmap_data, fs.st_size); | |
156 | ||
c98d4212 RM |
157 | unlink (test_file); |
158 | free (test_file); | |
de153e7f UD |
159 | |
160 | return 0; | |
161 | } | |
af83568d AZ |
162 | |
163 | #define PREPARE(argc, argv) do_prepare (argc, argv) | |
164 | #define TEST_FUNCTION do_test () | |
165 | #include "../test-skeleton.c" |