Ensure that non-git basic installs return sane version information

[fio.git] / os / windows / posix.c

diff --git a/os/windows/posix.c b/os/windows/posix.c
index ba7abb54a97b6fd2473ed975bcbc58cb1f3ae05a..9ef369e1d313af14440e7f38618afddafb8322a2 100755 (executable)
--- a/os/windows/posix.c
+++ b/os/windows/posix.c
@@ -331,9 +331,43 @@ char *basename(char *path)
 
 int posix_fallocate(int fd, off_t offset, off_t len)
 {
-       log_err("%s is not implemented\n", __func__);
-       errno = ENOSYS;
-       return (-1);
+       const int BUFFER_SIZE = 64*1024*1024;
+       int rc = 0;
+       char *buf;
+       unsigned int write_len;
+       unsigned int bytes_written;
+       off_t bytes_remaining = len;
+
+       if (len == 0 || offset < 0)
+               return EINVAL;
+
+       buf = malloc(BUFFER_SIZE);
+
+       if (buf == NULL)
+               return ENOMEM;
+
+       memset(buf, 0, BUFFER_SIZE);
+
+       if (lseek(fd, offset, SEEK_SET) == -1)
+               return errno;
+
+       while (bytes_remaining > 0) {
+               if (bytes_remaining < BUFFER_SIZE)
+                       write_len = (unsigned int)bytes_remaining;
+               else
+                       write_len = BUFFER_SIZE;
+
+               bytes_written = _write(fd, buf, write_len);
+               if (bytes_written == -1) {
+                       rc = errno;
+                       break;
+               }
+
+               bytes_remaining -= bytes_written;
+       }
+
+       free(buf);
+       return rc;
 }
 
 int ftruncate(int fildes, off_t length)
@@ -545,7 +579,7 @@ int poll(struct pollfd fds[], nfds_t nfds, int timeout)
        int rc;
 
        if (timeout != -1)
-               to = &tv;               
+               to = &tv;
 
        to->tv_sec = timeout / 1000;
        to->tv_usec = (timeout % 1000) * 1000;
@@ -567,7 +601,7 @@ int poll(struct pollfd fds[], nfds_t nfds, int timeout)
                if (fds[i].events & POLLOUT)
                        FD_SET(fds[i].fd, &writefds);
 
-               FD_SET(fds[i].fd, &exceptfds);          
+               FD_SET(fds[i].fd, &exceptfds);
        }
 
        rc = select(nfds, &readfds, &writefds, &exceptfds, to);