#include <config.h>
+/* Specification. */
+#include <unistd.h>
+
#include <sys/types.h>
#include <fcntl.h>
# include <sys/stat.h>
# include <errno.h>
-# include <unistd.h>
int
ftruncate (int fd, off_t length)
{
/* Extend file length. */
if (lseek (fd, (length - 1), SEEK_SET) < 0)
- return -1;
+ return -1;
/* Write a "0" byte. */
if (write (fd, "", 1) != 1)
- return -1;
+ return -1;
}
else
{
fl.l_whence = 0;
fl.l_len = 0;
fl.l_start = length;
- fl.l_type = F_WRLCK; /* write lock on file space */
+ fl.l_type = F_WRLCK; /* write lock on file space */
/* This relies on the *undocumented* F_FREESP argument to fcntl,
- which truncates the file so that it ends at the position
- indicated by fl.l_start. Will minor miracles never cease? */
+ which truncates the file so that it ends at the position
+ indicated by fl.l_start. Will minor miracles never cease? */
if (fcntl (fd, F_FREESP, &fl) < 0)
- return -1;
+ return -1;
}
return 0;
}
# else /* not F_CHSIZE nor F_FREESP */
-# if HAVE_CHSIZE
+# if HAVE_CHSIZE /* native Windows, e.g. mingw */
int
ftruncate (int fd, off_t length)