stdioext: Add support for Minix.

[gnulib.git] / lib / stat-time.h

diff --git a/lib/stat-time.h b/lib/stat-time.h
index 6b02e4c..86d9d4b 100644 (file)
--- a/lib/stat-time.h
+++ b/lib/stat-time.h
@@ -1,6 +1,6 @@
 /* stat-related time functions.
 
-   Copyright (C) 2005, 2007 Free Software Foundation, Inc.
+   Copyright (C) 2005, 2007, 2009-2011 Free Software Foundation, Inc.
 
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -93,6 +93,8 @@ get_stat_birthtime_ns (struct stat const *st)
 # elif defined HAVE_STRUCT_STAT_ST_BIRTHTIMENSEC
   return STAT_TIMESPEC_NS (st, st_birthtim);
 # else
+  /* Avoid a "parameter unused" warning.  */
+  (void) st;
   return 0;
 # endif
 }
@@ -140,7 +142,7 @@ get_stat_mtime (struct stat const *st)
 }
 
 /* Return *ST's birth time, if available; otherwise return a value
-   with negative tv_nsec.  */
+   with tv_sec and tv_nsec both equal to -1.  */
 static inline struct timespec
 get_stat_birthtime (struct stat const *st)
 {
@@ -159,9 +161,11 @@ get_stat_birthtime (struct stat const *st)
   t.tv_sec = st->st_ctime;
   t.tv_nsec = 0;
 #else
-  /* Birth time is not supported.  Set tv_sec to avoid undefined behavior.  */
+  /* Birth time is not supported.  */
   t.tv_sec = -1;
   t.tv_nsec = -1;
+  /* Avoid a "parameter unused" warning.  */
+  (void) st;
 #endif
 
 #if (defined HAVE_STRUCT_STAT_ST_BIRTHTIMESPEC_TV_NSEC \
@@ -171,10 +175,12 @@ get_stat_birthtime (struct stat const *st)
      using zero.  Attempt to work around this problem.  Alas, this can
      report failure even for valid time stamps.  Also, NetBSD
      sometimes returns junk in the birth time fields; work around this
-     bug if it it is detected.  There's no need to detect negative
-     tv_nsec junk as negative tv_nsec already indicates an error.  */
-  if (t.tv_sec == 0 || 1000000000 <= t.tv_nsec)
-    t.tv_nsec = -1;
+     bug if it is detected.  */
+  if (! (t.tv_sec && 0 <= t.tv_nsec && t.tv_nsec < 1000000000))
+    {
+      t.tv_sec = -1;
+      t.tv_nsec = -1;
+    }
 #endif
 
   return t;