X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Fstat-time.h;h=649c848732bd8b184f39b08989ed7b11c7ca420c;hb=fa662f811f9a6dda54f64639b107b1637c3ba2e5;hp=5fd18c1fac094dae47bbd02a3843415646089944;hpb=0e698b54a2d85bddf2bb04ecb60435da4b1bcf11;p=gnulib.git

diff --git a/lib/stat-time.h b/lib/stat-time.h
index 5fd18c1fa..649c84873 100644
--- a/lib/stat-time.h
+++ b/lib/stat-time.h
@@ -21,13 +21,15 @@
 #ifndef STAT_TIME_H
 #define STAT_TIME_H 1
 
+#include <sys/stat.h>
 #include <time.h>
 
 /* STAT_TIMESPEC (ST, ST_XTIM) is the ST_XTIM member for *ST of type
    struct timespec, if available.  If not, then STAT_TIMESPEC_NS (ST,
    ST_XTIM) is the nanosecond component of the ST_XTIM member for *ST,
-   if available.  ST_XTIM can be st_atim, st_ctim, or st_mtim for
-   access, status change, or data modification time, respectively.
+   if available.  ST_XTIM can be st_atim, st_ctim, st_mtim, or st_birthtim
+   for access, status change, data modification, or birth (creation)
+   time respectively.
 
    These macros are private to stat-time.h.  */
 #if defined HAVE_STRUCT_STAT_ST_ATIM_TV_NSEC
@@ -52,8 +54,6 @@ get_stat_atime_ns (struct stat const *st)
   return STAT_TIMESPEC (st, st_atim).tv_nsec;
 # elif defined STAT_TIMESPEC_NS
   return STAT_TIMESPEC_NS (st, st_atim);
-# elif defined HAVE_STRUCT_STAT_ST_SPARE1
-  return st->st_spare1 * 1000;
 # else
   return 0;
 # endif
@@ -67,8 +67,6 @@ get_stat_ctime_ns (struct stat const *st)
   return STAT_TIMESPEC (st, st_ctim).tv_nsec;
 # elif defined STAT_TIMESPEC_NS
   return STAT_TIMESPEC_NS (st, st_ctim);
-# elif defined HAVE_STRUCT_STAT_ST_SPARE1
-  return st->st_spare3 * 1000;
 # else
   return 0;
 # endif
@@ -82,8 +80,19 @@ get_stat_mtime_ns (struct stat const *st)
   return STAT_TIMESPEC (st, st_mtim).tv_nsec;
 # elif defined STAT_TIMESPEC_NS
   return STAT_TIMESPEC_NS (st, st_mtim);
-# elif defined HAVE_STRUCT_STAT_ST_SPARE1
-  return st->st_spare2 * 1000;
+# else
+  return 0;
+# endif
+}
+
+/* Return the nanosecond component of *ST's birth time.  */
+static inline long int
+get_stat_birthtime_ns (struct stat const *st)
+{
+# if defined HAVE_STRUCT_STAT_ST_BIRTHTIMESPEC_TV_NSEC
+  return STAT_TIMESPEC (st, st_birthtim).tv_nsec;
+# elif defined HAVE_STRUCT_STAT_ST_BIRTHTIMENSEC
+  return STAT_TIMESPEC_NS (st, st_birthtim);
 # else
   return 0;
 # endif
@@ -131,4 +140,45 @@ get_stat_mtime (struct stat const *st)
 #endif
 }
 
+/* Return *ST's birth time, if available; otherwise return a value
+   with negative tv_nsec.  */
+static inline struct timespec
+get_stat_birthtime (struct stat const *st)
+{
+  struct timespec t;
+
+#if (defined HAVE_STRUCT_STAT_ST_BIRTHTIMESPEC_TV_NSEC \
+     || defined HAVE_STRUCT_STAT_ST_BIRTHTIM_TV_NSEC)
+  t = STAT_TIMESPEC (st, st_birthtim);
+#elif defined HAVE_STRUCT_STAT_ST_BIRTHTIMENSEC
+  t.tv_sec = st->st_birthtime;
+  t.tv_nsec = st->st_birthtimensec;
+#elif (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
+  /* Woe32 native platforms (but not Cygwin) put the "file creation
+     time" in st_ctime (!).  See
+     <http://msdn2.microsoft.com/de-de/library/14h5k7ff(VS.80).aspx>.  */
+  t.tv_sec = st->st_ctime;
+  t.tv_nsec = 0;
+#else
+  /* Birth time is not supported.  Set tv_sec to avoid undefined behavior.  */
+  t.tv_sec = -1;
+  t.tv_nsec = -1;
+#endif
+
+#if (defined HAVE_STRUCT_STAT_ST_BIRTHTIMESPEC_TV_NSEC \
+     || defined HAVE_STRUCT_STAT_ST_BIRTHTIM_TV_NSEC \
+     || defined HAVE_STRUCT_STAT_ST_BIRTHTIMENSEC)
+  /* FreeBSD and NetBSD sometimes signal the absence of knowledge by
+     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;
+#endif
+
+  return t;
+}
+
 #endif