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Commit | Line | Data |
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405550bf UD |
1 | #include <errno.h> |
2 | #include <stdio.h> | |
3 | #include <stdlib.h> | |
4 | #include <unistd.h> | |
5 | ||
6 | ||
7 | static char *fname; | |
8 | ||
9 | ||
10 | static void do_prepare (void); | |
11 | #define PREPARE(argc, argv) do_prepare () | |
12 | static int do_test (void); | |
13 | #define TEST_FUNCTION do_test () | |
14 | #include <test-skeleton.c> | |
15 | ||
16 | ||
17 | static void | |
18 | do_prepare (void) | |
19 | { | |
20 | static const char pattern[] = "12345678901234567890"; | |
21 | int fd = create_temp_file ("bug-fseek.", &fname); | |
22 | if (fd == -1) | |
23 | { | |
24 | printf ("cannot create temporary file: %m\n"); | |
25 | exit (1); | |
26 | } | |
27 | ||
28 | if (write (fd, pattern, sizeof (pattern)) != sizeof (pattern)) | |
29 | { | |
30 | perror ("short write"); | |
31 | abort (); | |
32 | } | |
33 | close (fd); | |
34 | } | |
35 | ||
36 | ||
37 | ||
38 | static int | |
39 | do_test (void) | |
40 | { | |
41 | FILE *f; | |
42 | int result = 0; | |
43 | char buf[10]; | |
44 | ||
45 | ||
46 | if ((f = fopen (fname, "r")) == (FILE *) NULL) | |
47 | { | |
48 | perror ("fopen(\"r\")"); | |
49 | } | |
50 | ||
51 | fread (buf, 3, 1, f); | |
52 | errno = 0; | |
53 | if (fseek (f, -10, SEEK_CUR) == 0) | |
54 | { | |
55 | printf ("fseek() for r to before start of file worked!\n"); | |
56 | result = 1; | |
57 | } | |
58 | else if (errno != EINVAL) | |
59 | { | |
60 | printf ("\ | |
61 | fseek() for r to before start of file did not set errno to EINVAL. \ | |
62 | Got %d instead\n", | |
63 | errno); | |
64 | result = 1; | |
65 | } | |
66 | ||
67 | fclose (f); | |
68 | ||
69 | ||
70 | if ((f = fopen (fname, "r+")) == (FILE *) NULL) | |
71 | { | |
72 | perror ("fopen(\"r+\")"); | |
73 | } | |
74 | ||
75 | fread (buf, 3, 1, f); | |
76 | errno = 0; | |
77 | if (fseek (f, -10, SEEK_CUR) == 0) | |
78 | { | |
79 | printf ("fseek() for r+ to before start of file worked!\n"); | |
80 | result = 1; | |
81 | } | |
82 | else if (errno != EINVAL) | |
83 | { | |
84 | printf ("\ | |
85 | fseek() for r+ to before start of file did not set errno to EINVAL. \ | |
86 | Got %d instead\n", | |
87 | errno); | |
88 | result = 1; | |
89 | } | |
90 | ||
91 | fclose (f); | |
92 | ||
7a9a2681 UD |
93 | |
94 | if ((f = fopen (fname, "r+")) == (FILE *) NULL) | |
95 | { | |
96 | perror ("fopen(\"r+\")"); | |
97 | } | |
98 | ||
99 | fread (buf, 3, 1, f); | |
100 | if (ftell (f) != 3) | |
101 | { | |
102 | puts ("ftell failed"); | |
103 | return 1; | |
104 | } | |
105 | errno = 0; | |
106 | if (fseek (f, -10, SEEK_CUR) == 0) | |
107 | { | |
108 | printf ("fseek() for r+ to before start of file worked!\n"); | |
109 | result = 1; | |
110 | } | |
111 | else if (errno != EINVAL) | |
112 | { | |
113 | printf ("\ | |
114 | fseek() for r+ to before start of file did not set errno to EINVAL. \ | |
115 | Got %d instead\n", | |
116 | errno); | |
117 | result = 1; | |
118 | } | |
119 | ||
120 | fclose (f); | |
121 | ||
405550bf UD |
122 | return result; |
123 | } |