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463918b5 UD |
1 | #include <errno.h> |
2 | #include <stdio.h> | |
3 | #include <stdlib.h> | |
4 | #include <unistd.h> | |
5 | ||
6 | ||
7 | static char fname[] = "/tmp/rndseek.XXXXXX"; | |
8 | static char tempdata[65 * 1024]; | |
9 | ||
10 | ||
11 | static int do_test (void); | |
12 | #define TEST_FUNCTION do_test () | |
13 | ||
14 | #include "../test-skeleton.c" | |
15 | ||
16 | ||
17 | static int | |
284749da | 18 | fp_test (const char *name, FILE *fp) |
463918b5 UD |
19 | { |
20 | int result = 0; | |
21 | int rounds = 10000; | |
22 | ||
23 | do | |
24 | { | |
25 | int idx = random () % (sizeof (tempdata) - 2); | |
26 | char ch1; | |
27 | char ch2; | |
28 | ||
29 | if (fseek (fp, idx, SEEK_SET) != 0) | |
30 | { | |
284749da | 31 | printf ("%s: %d: fseek failed: %m\n", name, rounds); |
463918b5 UD |
32 | result = 1; |
33 | break; | |
34 | } | |
35 | ||
36 | ch1 = fgetc_unlocked (fp); | |
37 | ch2 = tempdata[idx]; | |
38 | if (ch1 != ch2) | |
39 | { | |
284749da UD |
40 | printf ("%s: %d: character at index %d not what is expected ('%c' vs '%c')\n", |
41 | name, rounds, idx, ch1, ch2); | |
463918b5 UD |
42 | result = 1; |
43 | break; | |
44 | } | |
45 | ||
46 | ch1 = fgetc (fp); | |
47 | ch2 = tempdata[idx + 1]; | |
48 | if (ch1 != ch2) | |
49 | { | |
284749da UD |
50 | printf ("%s: %d: character at index %d not what is expected ('%c' vs '%c')\n", |
51 | name, rounds, idx + 1, ch1, ch2); | |
463918b5 UD |
52 | result = 1; |
53 | break; | |
54 | } | |
55 | } | |
56 | while (--rounds > 0); | |
57 | ||
58 | fclose (fp); | |
59 | ||
60 | return result; | |
61 | } | |
62 | ||
63 | ||
64 | static int | |
65 | do_test (void) | |
66 | { | |
67 | int fd; | |
68 | FILE *fp; | |
57b36a0a | 69 | size_t i; |
463918b5 UD |
70 | int result; |
71 | ||
72 | fd = mkstemp (fname); | |
73 | if (fd == -1) | |
74 | { | |
75 | printf ("cannot open temporary file: %m\n"); | |
76 | return 1; | |
77 | } | |
78 | /* Make sure the file gets removed. */ | |
79 | add_temp_file (fname); | |
80 | ||
81 | /* Repeatability demands this. */ | |
82 | srandom (42); | |
83 | ||
84 | /* First create some temporary data. */ | |
85 | for (i = 0; i < sizeof (tempdata); ++i) | |
284749da | 86 | tempdata[i] = 'a' + random () % 26; |
463918b5 UD |
87 | |
88 | /* Write this data to a file. */ | |
89 | if (TEMP_FAILURE_RETRY (write (fd, tempdata, sizeof (tempdata))) | |
90 | != sizeof (tempdata)) | |
91 | { | |
92 | printf ("cannot wrote data to temporary file: %m\n"); | |
93 | return 1; | |
94 | } | |
95 | ||
96 | /* Now try reading the data. */ | |
97 | fp = fdopen (dup (fd), "r"); | |
98 | if (fp == NULL) | |
99 | { | |
100 | printf ("cannot duplicate temporary file descriptor: %m\n"); | |
101 | return 1; | |
102 | } | |
103 | ||
104 | rewind (fp); | |
105 | for (i = 0; i < sizeof (tempdata); ++i) | |
106 | { | |
107 | int ch0 = fgetc (fp); | |
108 | char ch1 = ch0; | |
109 | char ch2 = tempdata[i]; | |
110 | ||
111 | if (ch0 == EOF) | |
112 | { | |
113 | puts ("premature end of file while reading data"); | |
114 | return 1; | |
115 | } | |
116 | ||
117 | if (ch1 != ch2) | |
118 | { | |
9a2d7205 | 119 | printf ("%zd: '%c' vs '%c'\n", i, ch1, ch2); |
463918b5 UD |
120 | return 1; |
121 | } | |
122 | } | |
123 | ||
284749da | 124 | result = fp_test ("fdopen(\"r\")", fp); |
463918b5 UD |
125 | |
126 | fp = fopen (fname, "r"); | |
284749da | 127 | result |= fp_test ("fopen(\"r\")", fp); |
463918b5 UD |
128 | |
129 | fp = fopen64 (fname, "r"); | |
284749da | 130 | result |= fp_test ("fopen64(\"r\")", fp); |
463918b5 UD |
131 | |
132 | /* The "rw" mode will prevent the mmap-using code from being used. */ | |
133 | fp = fdopen (fd, "rw"); | |
284749da | 134 | result = fp_test ("fdopen(\"rw\")", fp); |
463918b5 UD |
135 | |
136 | fp = fopen (fname, "rw"); | |
284749da | 137 | result |= fp_test ("fopen(\"rw\")", fp); |
463918b5 UD |
138 | |
139 | fp = fopen64 (fname, "rw"); | |
284749da | 140 | result |= fp_test ("fopen64(\"rw\")", fp); |
463918b5 UD |
141 | |
142 | return result; | |
143 | } |