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Commit | Line | Data |
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acbee5f6 RM |
1 | /* Test program for synchronization of stdio state with file after EOF. */ |
2 | ||
3 | #include <stdio.h> | |
4 | #include <error.h> | |
5 | #include <errno.h> | |
6 | #include <string.h> | |
7 | #include <unistd.h> | |
8 | ||
9 | static void do_prepare (void); | |
10 | #define PREPARE(argc, argv) do_prepare () | |
11 | static int do_test (void); | |
12 | #define TEST_FUNCTION do_test () | |
13 | #include <test-skeleton.c> | |
14 | ||
15 | static char *temp_file; | |
16 | static int temp_fd; | |
17 | ||
18 | static char *pages; | |
19 | ||
20 | static void | |
21 | do_prepare (void) | |
22 | { | |
23 | pages = malloc (getpagesize () * 2); | |
24 | memset (pages, 'a', getpagesize ()); | |
25 | memset (pages + getpagesize (), 'b', getpagesize ()); | |
26 | ||
27 | temp_fd = create_temp_file ("tst-mmap2-eofsync.", &temp_file); | |
28 | if (temp_fd == -1) | |
29 | error (1, errno, "cannot create temporary file"); | |
30 | else | |
31 | { | |
32 | ssize_t cc = write (temp_fd, pages, getpagesize ()); | |
33 | if (cc != getpagesize ()) | |
34 | error (1, errno, "cannot write to temporary file"); | |
35 | } | |
36 | } | |
37 | ||
38 | static int | |
39 | do_test (void) | |
40 | { | |
41 | const size_t pagesize = getpagesize (); | |
42 | FILE *f; | |
43 | char buf[pagesize]; | |
44 | int result = 0; | |
45 | int c; | |
46 | ||
1ce8aaae | 47 | f = fopen (temp_file, "rm"); |
acbee5f6 RM |
48 | if (f == NULL) |
49 | { | |
50 | perror (temp_file); | |
51 | return 1; | |
52 | } | |
53 | ||
54 | if (fread (buf, pagesize, 1, f) != 1) | |
55 | { | |
56 | perror ("fread"); | |
57 | return 1; | |
58 | } | |
59 | ||
60 | if (memcmp (buf, pages, pagesize)) | |
61 | { | |
62 | puts ("data mismatch in page 1"); | |
63 | result = 1; | |
64 | } | |
65 | ||
66 | printf ("feof = %d, ferror = %d immediately after fread\n", | |
67 | feof (f), ferror (f)); | |
68 | ||
69 | c = fgetc (f); | |
70 | if (c == EOF) | |
71 | printf ("fgetc -> EOF (feof = %d, ferror = %d)\n", | |
72 | feof (f), ferror (f)); | |
73 | else | |
74 | { | |
75 | printf ("fgetc returned %o (feof = %d, ferror = %d)\n", | |
76 | c, feof (f), ferror (f)); | |
77 | result = 1; | |
78 | } | |
79 | ||
80 | c = write (temp_fd, pages + pagesize, pagesize); | |
57b36a0a | 81 | if (c == (ssize_t) pagesize) |
acbee5f6 RM |
82 | printf ("wrote more to file\n"); |
83 | else | |
84 | { | |
6d497bbe | 85 | printf ("wrote %d != %zd (%m)\n", c, pagesize); |
acbee5f6 RM |
86 | result = 1; |
87 | } | |
88 | ||
89 | if (fread (buf, pagesize, 1, f) != 1) | |
90 | { | |
91 | printf ("second fread fails: feof = %d, ferror = %d (%m)\n", | |
92 | feof (f), ferror (f)); | |
93 | clearerr (f); | |
94 | if (fread (buf, pagesize, 1, f) != 1) | |
95 | { | |
96 | printf ("retry fread fails: feof = %d, ferror = %d (%m)\n", | |
97 | feof (f), ferror (f)); | |
98 | result = 1; | |
99 | } | |
100 | } | |
101 | if (result == 0 && memcmp (buf, pages + pagesize, pagesize)) | |
102 | { | |
103 | puts ("data mismatch in page 2"); | |
104 | result = 1; | |
105 | } | |
106 | ||
107 | fseek (f, pagesize - 1, SEEK_SET); | |
108 | c = fgetc (f); | |
109 | if (c != 'a') | |
110 | { | |
111 | printf ("fgetc at end of page 1 read '%c' (%m)\n", c); | |
112 | result = 1; | |
113 | } | |
114 | ||
115 | if (ftruncate (temp_fd, pagesize) < 0) | |
116 | { | |
117 | printf ("ftruncate failed: %m\n"); | |
118 | result = 1; | |
119 | } | |
120 | ||
121 | fflush (f); | |
122 | ||
123 | c = fgetc (f); | |
124 | if (c == EOF) | |
125 | printf ("after truncate fgetc -> EOF (feof = %d, ferror = %d)\n", | |
126 | feof (f), ferror (f)); | |
127 | else | |
128 | { | |
129 | printf ("after truncate fgetc returned '%c' (feof = %d, ferror = %d)\n", | |
130 | c, feof (f), ferror (f)); | |
131 | result = 1; | |
132 | } | |
133 | ||
134 | fclose (f); | |
135 | ||
136 | return result; | |
137 | } |