Rename st_*timespec fields to st_*tim for POSIX 2008 compliance.

A nice thing about POSIX 2008 is that it finally standardizes a way to
obtain file access/modification/change times in sub-second precision,
namely using struct timespec, which we already have for a very long
time. Unfortunately POSIX uses different names.

This commit adds compatibility macros, so existing code should still
build properly. Also change all source code in the kernel to work
without any of the compatibility macros. This makes it all a less
ambiguous.

I am also renaming st_birthtime to st_birthtim, even though it was a
local extension anyway. It seems Cygwin also has a st_birthtim.

1 files changed, 17 insertions, 11 deletions

diff --git a/lib/libc/sys/stat.2 b/lib/libc/sys/stat.2
index 3085ef0..917b6be 100644
--- a/lib/libc/sys/stat.2
+++ b/lib/libc/sys/stat.2
@@ -149,8 +149,8 @@ fields together identify the file uniquely within the system.
 The time-related fields of
 .Vt "struct stat"
 are as follows:
-.Bl -tag -width ".Va st_birthtime"
-.It Va st_atime
+.Bl -tag -width ".Va st_birthtim"
+.It Va st_atim
 Time when file data last accessed.
 Changed by the
 .Xr mknod 2 ,
@@ -159,7 +159,7 @@ Changed by the
 and
 .Xr readv 2
 system calls.
-.It Va st_mtime
+.It Va st_mtim
 Time when file data last modified.
 Changed by the
 .Xr mkdir 2 ,
@@ -170,7 +170,7 @@ Changed by the
 and
 .Xr writev 2
 system calls.
-.It Va st_ctime
+.It Va st_ctim
 Time when file status was last changed (inode data modification).
 Changed by the
 .Xr chflags 2 ,
@@ -191,18 +191,24 @@ Changed by the
 and
 .Xr writev 2
 system calls.
-.It Va st_birthtime
+.It Va st_birthtim
 Time when the inode was created.
 .El
 .Pp
-If
-.Dv _POSIX_SOURCE
-is not defined, the time-related fields are defined as:
+The following time-related macros are defined for compatibility:
 .Bd -literal
+#define	st_atime		st_atim.tv_sec
+#define	st_mtime		st_mtim.tv_sec
+#define	st_ctime		st_ctim.tv_sec
+#ifndef _POSIX_SOURCE
+#define	st_birthtime		st_birthtim.tv_sec
+#endif
+
 #ifndef _POSIX_SOURCE
-#define st_atime st_atimespec.tv_sec
-#define st_mtime st_mtimespec.tv_sec
-#define st_ctime st_ctimespec.tv_sec
+#define	st_atimespec		st_atim
+#define	st_mtimespec		st_mtim
+#define	st_ctimespec		st_ctim
+#define	st_birthtimespec	st_birthtim
 #endif
 .Ed
 .Pp