1
5
printf(“ Appending to file\n”);
fd = open(“junk.out”, 0_WRONLY| 0_APPEND);
assert(fd>=0);
printf( “ locking file\n”);
rc = flock(fd, LOCK_EX);
assert(rc == 0);
printf(“sleeping for 10 seconds\n”);
sleep(10);
printf(“writing data\n”);
rc = write(fd, sample2, strlen(sample2));
assert(rc == strlen(sample2));
printf(“unlocking file\n”);
rc = flock(fd, LOCK_UN);
assert(rc == 0);
close(fd);
printf(“Reading file \n”);
fd = open(“junk.out”, 0_RDONLY);
assert (fd >=0);
while (1)
{
rc = read (fd, data, sizeof (data) );
if( rc > 0 )
{
data[rc] =0; /* kết thúc xâu */
printf (“ Data read (rc = %d): <%s>\n”, rc, data);
}
else if (rc == 0)
{
printf (“ End of file read \ n”);
break;
} else
{
perror ( “ read error ” );
break;
}
}
close (fd);
printf (“ Fiddling with inode\n”);
fd = open (“ junk.out”, 0_RDONLY);
