1 | /* basic fmemopen interface testing. |
2 | Copyright (C) 2014-2022 Free Software Foundation, Inc. |
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 |
17 | <https://www.gnu.org/licenses/>. */ |
18 | |
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 | |
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 (ptr: &test_file, fmt: "%s.test" , argv[0]) < 0) |
38 | { |
39 | puts (s: "asprintf failed\n" ); |
40 | exit (EXIT_FAILURE); |
41 | } |
42 | } |
43 | |
44 | static int |
45 | do_test (void) |
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 */ |
55 | if ((fp = fopen (test_file, "w+" )) == NULL) |
56 | return 1; |
57 | if (fwrite (blah, 1, strlen (blah), fp) != strlen (blah)) |
58 | { |
59 | fclose (fp); |
60 | return 2; |
61 | } |
62 | |
63 | rewind (fp); |
64 | printf (format: "file: " ); |
65 | cp = blah; |
66 | while ((ch = getc (stream: fp)) != EOF) |
67 | { |
68 | fputc (c: ch, stdout); |
69 | if (ch != *cp) |
70 | { |
71 | printf (format: "\ncharacter %td: '%c' instead of '%c'\n" , |
72 | cp - blah, ch, *cp); |
73 | fclose (fp); |
74 | return 1; |
75 | } |
76 | ++cp; |
77 | } |
78 | fputc (c: '\n', stdout); |
79 | if (ferror (stream: fp)) |
80 | { |
81 | puts (s: "fp: error" ); |
82 | fclose (fp); |
83 | return 1; |
84 | } |
85 | if (feof (stream: fp)) |
86 | printf (format: "fp: EOF\n" ); |
87 | else |
88 | { |
89 | puts (s: "not EOF" ); |
90 | fclose (fp); |
91 | return 1; |
92 | } |
93 | fclose (fp); |
94 | |
95 | /* Now, mmap the file into a buffer, and do that too */ |
96 | if ((fd = open (file: test_file, O_RDONLY)) == -1) |
97 | { |
98 | printf (format: "open (%s, O_RDONLY) failed\n" , test_file); |
99 | return 3; |
100 | } |
101 | if (fstat (fd: fd, buf: &fs) == -1) |
102 | { |
103 | printf (format: "stat (%i)\n" , fd); |
104 | return 4; |
105 | } |
106 | |
107 | if ((mmap_data = (char *) mmap (NULL, len: fs.st_size, PROT_READ, |
108 | MAP_SHARED, fd: fd, offset: 0)) == MAP_FAILED) |
109 | { |
110 | printf (format: "mmap (NULL, %zu, PROT_READ, MAP_SHARED, %i, 0) failed\n" , |
111 | (size_t) fs.st_size, fd); |
112 | return 5; |
113 | } |
114 | |
115 | if ((fp = fmemopen (mmap_data, fs.st_size, "r" )) == NULL) |
116 | { |
117 | printf (format: "fmemopen (%p, %zu) failed\n" , mmap_data, (size_t) fs.st_size); |
118 | return 1; |
119 | } |
120 | |
121 | printf (format: "mem: " ); |
122 | cp = blah; |
123 | while ((ch = getc (stream: fp)) != EOF) |
124 | { |
125 | fputc (c: ch, stdout); |
126 | if (ch != *cp) |
127 | { |
128 | printf (format: "%td character: '%c' instead of '%c'\n" , |
129 | cp - blah, ch, *cp); |
130 | fclose (fp); |
131 | return 1; |
132 | } |
133 | ++cp; |
134 | } |
135 | |
136 | fputc (c: '\n', stdout); |
137 | |
138 | if (ferror (stream: fp)) |
139 | { |
140 | puts (s: "fp: error" ); |
141 | fclose (fp); |
142 | return 1; |
143 | } |
144 | if (feof (stream: fp)) |
145 | printf (format: "fp: EOF\n" ); |
146 | else |
147 | { |
148 | puts (s: "not EOF" ); |
149 | fclose (fp); |
150 | return 1; |
151 | } |
152 | |
153 | fclose (fp); |
154 | |
155 | munmap (addr: mmap_data, len: fs.st_size); |
156 | |
157 | unlink (name: test_file); |
158 | free (ptr: test_file); |
159 | |
160 | return 0; |
161 | } |
162 | |
163 | #define PREPARE(argc, argv) do_prepare (argc, argv) |
164 | #define TEST_FUNCTION do_test () |
165 | #include "../test-skeleton.c" |
166 | |