stpncpy: Allow stpncpy to be defined as a macro.

[gnulib.git] / lib / ftruncate.c

diff --git a/lib/ftruncate.c b/lib/ftruncate.c
index d5e1add..33b69d8 100644 (file)
--- a/lib/ftruncate.c
+++ b/lib/ftruncate.c
@@ -1,9 +1,10 @@
 /* ftruncate emulations that work on some System V's.
    This file is in the public domain.  */
 
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
+#include <config.h>
+
+/* Specification.  */
+#include <unistd.h>
 
 #include <sys/types.h>
 #include <fcntl.h>
@@ -23,9 +24,6 @@ ftruncate (int fd, off_t length)
 
 #  include <sys/stat.h>
 #  include <errno.h>
-#  if HAVE_UNISTD_H
-#   include <unistd.h>
-#  endif
 
 int
 ftruncate (int fd, off_t length)
@@ -40,11 +38,11 @@ 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
     {
@@ -54,21 +52,21 @@ ftruncate (int fd, off_t length)
       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)