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Commit | Line | Data |
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de153e7f UD |
1 | #include <errno.h> |
2 | #include <fcntl.h> | |
3 | #include <stdio.h> | |
4 | #include <stdlib.h> | |
5 | #include <string.h> | |
6 | #include <unistd.h> | |
7 | #include <sys/mman.h> | |
8 | #include <sys/stat.h> | |
9 | #include <sys/types.h> | |
10 | ||
de153e7f | 11 | int |
c98d4212 | 12 | main (int argc, char **argv) |
de153e7f | 13 | { |
4579f81c | 14 | char *test_file; |
de153e7f UD |
15 | const char blah[] = "BLAH"; |
16 | FILE *fp; | |
17 | char *mmap_data; | |
18 | int ch, fd; | |
19 | struct stat fs; | |
20 | const char *cp; | |
21 | ||
c98d4212 RM |
22 | /* Construct the test file name based on ARGV[0], which will be |
23 | an absolute file name in the build directory. Don't touch the | |
24 | source directory, which might be read-only. */ | |
25 | if (argc != 1 || asprintf (&test_file, "%s.test", argv[0]) < 0) | |
26 | exit (99); | |
27 | ||
de153e7f | 28 | /* setup the physical file, and use it */ |
c98d4212 | 29 | if ((fp = fopen (test_file, "w+")) == NULL) |
de153e7f UD |
30 | exit (1); |
31 | if (fwrite (blah, 1, strlen (blah), fp) != strlen (blah)) | |
32 | exit (2); | |
33 | ||
34 | rewind (fp); | |
35 | printf ("file: "); | |
36 | cp = blah; | |
37 | while ((ch = getc (fp)) != EOF) | |
38 | { | |
39 | fputc (ch, stdout); | |
40 | if (ch != *cp) | |
41 | { | |
59553897 | 42 | printf ("\ncharacter %td: '%c' instead of '%c'\n", |
de153e7f UD |
43 | cp - blah, ch, *cp); |
44 | exit (1); | |
45 | } | |
46 | ++cp; | |
47 | } | |
48 | fputc ('\n', stdout); | |
49 | if (ferror (fp)) | |
50 | { | |
51 | puts ("fp: error"); | |
52 | exit (1); | |
53 | } | |
54 | if (feof (fp)) | |
55 | printf ("fp: EOF\n"); | |
56 | else | |
57 | { | |
58 | puts ("not EOF"); | |
59 | exit (1); | |
60 | } | |
61 | fclose (fp); | |
62 | ||
63 | /* Now, mmap the file into a buffer, and do that too */ | |
c98d4212 | 64 | if ((fd = open (test_file, O_RDONLY)) == -1) |
de153e7f UD |
65 | exit (3); |
66 | if (fstat (fd, &fs) == -1) | |
67 | exit (4); | |
68 | ||
69 | if ((mmap_data = (char *) mmap (NULL, fs.st_size, PROT_READ, | |
7c11c4a1 | 70 | MAP_SHARED, fd, 0)) == MAP_FAILED) |
de153e7f UD |
71 | { |
72 | if (errno == ENOSYS) | |
73 | exit (0); | |
74 | exit (5); | |
75 | } | |
76 | ||
77 | if ((fp = fmemopen (mmap_data, fs.st_size, "r")) == NULL) | |
78 | exit (1); | |
79 | ||
80 | printf ("mem: "); | |
81 | cp = blah; | |
82 | while ((ch = getc (fp)) != EOF) | |
83 | { | |
84 | fputc (ch, stdout); | |
85 | if (ch != *cp) | |
86 | { | |
59553897 | 87 | printf ("%td character: '%c' instead of '%c'\n", |
de153e7f UD |
88 | cp - blah, ch, *cp); |
89 | exit (1); | |
90 | } | |
91 | ++cp; | |
92 | } | |
93 | ||
94 | fputc ('\n', stdout); | |
95 | ||
96 | if (ferror (fp)) | |
97 | { | |
98 | puts ("fp: error"); | |
99 | exit (1); | |
100 | } | |
101 | if (feof (fp)) | |
102 | printf ("fp: EOF\n"); | |
103 | else | |
104 | { | |
105 | puts ("not EOF"); | |
106 | exit (1); | |
107 | } | |
108 | ||
109 | fclose (fp); | |
110 | ||
111 | munmap (mmap_data, fs.st_size); | |
112 | ||
c98d4212 RM |
113 | unlink (test_file); |
114 | free (test_file); | |
de153e7f UD |
115 | |
116 | return 0; | |
117 | } |