Add st_birthtime and friends for accurate create times on systems that support it (*BSD and MacOSX).

Should have done this ages ago, sorry.
Jeremy.
(This used to be commit 4c3a9558906f213948c3bdc081be73f8fed148cb)

4 files changed, 124 insertions, 14 deletions

diff --git a/source3/configure.in b/source3/configure.in
index 9436fed1ff..bc5a827b8c 100644
--- a/source3/configure.in
+++ b/source3/configure.in
@@ -1354,6 +1354,96 @@ if test x"$samba_cv_stat_hires_notimespec" = x"yes" ; then
 	    [whether struct stat has sub-second timestamps without struct timespec])
 fi
 
+AC_CACHE_CHECK([whether struct stat has st_birthtimespec], samba_cv_stat_st_birthtimespec,
+    [
+	AC_TRY_COMPILE(
+	    [
+#if TIME_WITH_SYS_TIME
+# include <sys/time.h>
+# include <time.h>
+#else
+# if HAVE_SYS_TIME_H
+#  include <sys/time.h>
+# else
+#  include <time.h>
+# endif
+#endif
+#ifdef HAVE_SYS_STAT_H
+#include <sys/stat.h>
+#endif
+	    ],
+	    [
+		struct timespec t;
+		struct stat s = {0};
+		t = s.st_birthtimespec;
+	    ],
+	    samba_cv_stat_st_birthtimespec=yes, samba_cv_stat_birthtimespec=no)
+    ])
+
+if test x"$samba_cv_stat_st_birthtimespec" = x"yes" ; then
+    AC_DEFINE(HAVE_STAT_ST_BIRTHTIMESPEC, 1, [whether struct stat contains st_birthtimespec])
+fi
+
+AC_CACHE_CHECK([whether struct stat has st_birthtimensec], samba_cv_stat_st_birthtimensec,
+    [
+	AC_TRY_COMPILE(
+	    [
+#if TIME_WITH_SYS_TIME
+# include <sys/time.h>
+# include <time.h>
+#else
+# if HAVE_SYS_TIME_H
+#  include <sys/time.h>
+# else
+#  include <time.h>
+# endif
+#endif
+#ifdef HAVE_SYS_STAT_H
+#include <sys/stat.h>
+#endif
+	    ],
+	    [
+		struct timespec t;
+		struct stat s = {0};
+		t.tv_nsec = s.st_birthtimensec;
+	    ],
+	    samba_cv_stat_st_birthtimensec=yes, samba_cv_stat_birthtimensec=no)
+    ])
+
+if test x"$samba_cv_stat_st_birthtimensec" = x"yes" ; then
+    AC_DEFINE(HAVE_STAT_ST_BIRTHTIMENSEC, 1, [whether struct stat contains st_birthtimensec])
+fi
+
+AC_CACHE_CHECK([whether struct stat has st_birthtime], samba_cv_stat_st_birthtime,
+    [
+	AC_TRY_COMPILE(
+	    [
+#if TIME_WITH_SYS_TIME
+# include <sys/time.h>
+# include <time.h>
+#else
+# if HAVE_SYS_TIME_H
+#  include <sys/time.h>
+# else
+#  include <time.h>
+# endif
+#endif
+#ifdef HAVE_SYS_STAT_H
+#include <sys/stat.h>
+#endif
+	    ],
+	    [
+		struct time_t t;
+		struct stat s = {0};
+		t = s.st_birthtime;
+	    ],
+	    samba_cv_stat_st_birthtime=yes, samba_cv_stat_birthtime=no)
+    ])
+
+if test x"$samba_cv_stat_st_birthtime" = x"yes" ; then
+    AC_DEFINE(HAVE_STAT_ST_BIRTHTIME, 1, [whether struct stat contains st_birthtime])
+fi
+
 #####################################
 # needed for SRV lookups
 AC_CHECK_LIB(resolv, dn_expand)
diff --git a/source3/include/proto.h b/source3/include/proto.h
index d3a8dbbc7f..2145a892c6 100644
--- a/source3/include/proto.h
+++ b/source3/include/proto.h
@@ -1185,7 +1185,6 @@ void srv_put_dos_date2(char *buf,int offset, time_t unixdate);
 void srv_put_dos_date3(char *buf,int offset,time_t unixdate);
 void put_long_date_timespec(char *p, struct timespec ts);
 void put_long_date(char *p, time_t t);
-time_t get_create_time(const SMB_STRUCT_STAT *st,bool fake_dirs);
 struct timespec get_create_timespec(const SMB_STRUCT_STAT *st,bool fake_dirs);
 struct timespec get_atimespec(const SMB_STRUCT_STAT *pst);
 void set_atimespec(SMB_STRUCT_STAT *pst, struct timespec ts);
diff --git a/source3/lib/time.c b/source3/lib/time.c
index 9db88b3fc8..3cf0cb4f64 100644
--- a/source3/lib/time.c
+++ b/source3/lib/time.c
@@ -826,14 +826,10 @@ void put_long_date(char *p, time_t t)
  structure.
 ****************************************************************************/
 
-time_t get_create_time(const SMB_STRUCT_STAT *st,bool fake_dirs)
+static time_t calc_create_time(const SMB_STRUCT_STAT *st)
 {
 	time_t ret, ret1;
 
-	if(S_ISDIR(st->st_mode) && fake_dirs) {
-		return (time_t)315493200L;          /* 1/1/1980 */
-	}
-    
 	ret = MIN(st->st_ctime, st->st_mtime);
 	ret1 = MIN(ret, st->st_atime);
 
@@ -848,12 +844,36 @@ time_t get_create_time(const SMB_STRUCT_STAT *st,bool fake_dirs)
 	return ret;
 }
 
-struct timespec get_create_timespec(const SMB_STRUCT_STAT *st,bool fake_dirs)
+/****************************************************************************
+ Return the 'create time' from a stat struct if it exists (birthtime) or else
+ use the best approximation.
+****************************************************************************/
+
+struct timespec get_create_timespec(const SMB_STRUCT_STAT *pst,bool fake_dirs)
 {
-	struct timespec ts;
-	ts.tv_sec = get_create_time(st, fake_dirs);
-	ts.tv_nsec = 0;
-	return ts;
+	struct timespec ret;
+
+	if(S_ISDIR(pst->st_mode) && fake_dirs) {
+		ret.tv_sec = 315493200L;          /* 1/1/1980 */
+		ret.tv_nsec = 0;
+		return ret;
+	}
+
+#if defined(HAVE_STAT_ST_BIRTHTIMESPEC)
+	return pst->st_birthtimespec;
+#elif defined(HAVE_STAT_ST_BIRTHTIMENSEC)
+	ret.tv_sec = pst->st_birthtime;
+	ret.tv_nsec = pst->st_birthtimenspec;
+	return ret;
+#elif defined(HAVE_STAT_ST_BIRTHTIME)
+	ret.tv_sec = pst->st_birthtime;
+	ret.tv_nsec = 0;
+	return ret;
+#else
+	ret.tv_sec = calc_create_time(pst);
+	ret.tv_nsec = 0;
+	return ret;
+#endif
 }
 
 /****************************************************************************
diff --git a/source3/smbd/reply.c b/source3/smbd/reply.c
index 06aa835cb0..ff38ac88cf 100644
--- a/source3/smbd/reply.c
+++ b/source3/smbd/reply.c
@@ -7126,6 +7126,7 @@ void reply_getattrE(struct smb_request *req)
 	SMB_STRUCT_STAT sbuf;
 	int mode;
 	files_struct *fsp;
+	struct timespec create_ts;
 
 	START_PROFILE(SMBgetattrE);
 
@@ -7160,9 +7161,9 @@ void reply_getattrE(struct smb_request *req)
 
 	reply_outbuf(req, 11, 0);
 
-	srv_put_dos_date2((char *)req->outbuf, smb_vwv0,
-			  get_create_time(&sbuf,
-					  lp_fake_dir_create_times(SNUM(conn))));
+	create_ts = get_create_timespec(&sbuf,
+				  lp_fake_dir_create_times(SNUM(conn)));
+	srv_put_dos_date2((char *)req->outbuf, smb_vwv0, create_ts.tv_sec);
 	srv_put_dos_date2((char *)req->outbuf, smb_vwv2, sbuf.st_atime);
 	/* Should we check pending modtime here ? JRA */
 	srv_put_dos_date2((char *)req->outbuf, smb_vwv4, sbuf.st_mtime);