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 (read, ssize_t, (int, void *, size_t));
23
24 #include <errno.h>
25 #include <fcntl.h>
26 #include <string.h>
27
28 #include "macros.h"
29
30 int
31 main (void)
32 {
33 const char *filename = "test-read.tmp";
34 int fd;
35
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37 fd = open (filename, O_CREAT | O_WRONLY, 0600);
38 ASSERT (fd >= 0);
39 ASSERT (write (fd, "Hello World", 11) == 11);
40 ASSERT (close (fd) == 0);
41
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43 fd = open (filename, O_RDONLY);
44 ASSERT (fd >= 0);
45 ASSERT (lseek (fd, 6, SEEK_SET) == 6);
46 {
47 char buf[10];
48 ssize_t ret = read (fd, buf, 10);
49 ASSERT (ret == 5);
50 ASSERT (memcmp (buf, "World", 5) == 0);
51 }
52 ASSERT (close (fd) == 0);
53
54
55 {
56 char byte;
57 errno = 0;
58 ASSERT (read (-1, &byte, 1) == -1);
59 ASSERT (errno == EBADF);
60 }
61 {
62 char byte;
63 close (99);
64 errno = 0;
65 ASSERT (read (99, &byte, 1) == -1);
66 ASSERT (errno == EBADF);
67 }
68
69
70 unlink (filename);
71
72 return 0;
73 }