This source file includes following definitions.
- main
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17 #include <config.h>
18
19 #include <unistd.h>
20
21 #include "signature.h"
22 SIGNATURE_CHECK (pwrite, ssize_t, (int, const void *, size_t, off_t));
23
24 #include <sys/types.h>
25 #include <fcntl.h>
26 #include <errno.h>
27 #include <string.h>
28
29 #include "macros.h"
30
31 #define N (sizeof buf - 1)
32
33 int
34 main (void)
35 {
36 char const *file = "out";
37 int fd;
38 char buf[] = "0123456789";
39 off_t pos = 2;
40 size_t i;
41 off_t init_pos;
42
43 ASSERT (file);
44
45 fd = open (file, O_CREAT | O_WRONLY, 0600);
46 ASSERT (0 <= fd);
47 ASSERT (write (fd, buf, N) == N);
48 ASSERT (close (fd) == 0);
49
50 fd = open (file, O_WRONLY, 0600);
51 ASSERT (0 <= fd);
52
53 init_pos = lseek (fd, pos, SEEK_SET);
54 ASSERT (init_pos == pos);
55
56 for (i = 0; i < N; i+=2)
57 {
58 const char byte = 'W';
59 ASSERT (pwrite (fd, &byte, 1, i) == 1);
60 ASSERT (lseek (fd, 0, SEEK_CUR) == init_pos);
61 }
62
63 {
64
65 const char byte = 'b';
66 ASSERT (pwrite (fd, &byte, 1, (off_t) -1) == -1);
67 ASSERT (errno == EINVAL);
68 }
69
70 ASSERT (close (fd) == 0);
71
72 {
73 fd = open (file, O_RDONLY);
74 ASSERT (0 <= fd);
75 ASSERT (read (fd, buf, N) == N);
76 ASSERT (close (fd) == 0);
77 ASSERT (strcmp ("W1W3W5W7W9",buf) == 0);
78 }
79
80
81 {
82 char byte = 'x';
83 errno = 0;
84 ASSERT (pwrite (-1, &byte, 1, 0) == -1);
85 ASSERT (errno == EBADF);
86 }
87 {
88 char byte = 'x';
89 close (99);
90 errno = 0;
91 ASSERT (pwrite (99, &byte, 1, 0) == -1);
92 ASSERT (errno == EBADF);
93 }
94
95 return 0;
96 }