Date: Fri, 24 Mar 2006 12:06:18 +0000 From: Ceri Davies <ceri@submonkey.net> To: hackers@FreeBSD.org Subject: Exposing a file's creation time via find(1) Message-ID: <20060324120618.GB17507@submonkey.net>
next in thread | raw e-mail | index | archive | help
--St7VIuEGZ6dlpu13
Content-Type: multipart/mixed; boundary="cNdxnHkX5QqsyA0e"
Content-Disposition: inline
--cNdxnHkX5QqsyA0e
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable
While perusing my Daemon book I noticed that it mentioned the existence
of the st_birthtime field in struct stat. I then also noticed that not
many utilities expose this: the Daemon mentions dump(8), restore(8) and
the only other one I could find was stat(1).
The attached patch adds st_birthtime related primaries to find(1), being
-Bmin, -Btime, -Bnewer et al. These let you use an inode's real
creation time in find primitives. I have chosen 'B' over 'b' to match
the format specifier from stat(1). It seems to do the right thing on UFS
1, 2 and MSDOS file systems, but some more testing would be appreciated.
Cheers,
Ceri
--=20
That must be wonderful! I don't understand it at all.
-- Moliere
--cNdxnHkX5QqsyA0e
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment; filename="find-Btime.diff"
Content-Transfer-Encoding: quoted-printable
Index: find.1
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
RCS file: /home/ncvs/src/usr.bin/find/find.1,v
retrieving revision 1.73
diff -u -r1.73 find.1
--- find.1 14 Jun 2005 11:50:51 -0000 1.73
+++ find.1 24 Mar 2006 12:02:04 -0000
@@ -174,6 +174,34 @@
.El
.Sh PRIMARIES
.Bl -tag -width indent
+.It Ic -Bmin Ar n
+True if the difference between the time of a file's inode creation
+and the time
+.Nm
+was started, rounded up to the next full minute, is
+.Ar n
+minutes.
+.It Ic -Bnewer Ar file
+Same as
+.Ic -newerBm .
+.It Ic -Btime Ar n Ns Op Cm smhdw
+If no units are specified, this primary evaluates to
+true if the difference between the time of a file's inode creation
+and the time
+.Nm
+was started, rounded up to the next full 24-hour period, is
+.Ar n
+24-hour periods.
+.Pp
+If units are specified, this primary evaluates to
+true if the difference between the time of last change of file status
+information and the time
+.Nm
+was started is exactly
+.Ar n
+units.
+Please refer to the
+.Ic -atime
.It Ic -acl
May be used in conjunction with other options to locate
files with extended ACLs.
@@ -227,6 +255,7 @@
or
.Cm -
modifier.
+primary description for information on supported time units.
.It Ic -cmin Ar n
True if the difference between the time of last change of file status
information and the time
@@ -497,12 +526,16 @@
.It Ic -newer Ns Ar X Ns Ar Y Ar file
True if the current file has a more recent last access time
.Ar ( X Ns =3D Ns Cm a ) ,
+inode creation time
+.Ar ( X Ns =3D Ns Cm B ) ,
change time
.Ar ( X Ns =3D Ns Cm c ) ,
or modification time
.Ar ( X Ns =3D Ns Cm m )
than the last access time
.Ar ( Y Ns =3D Ns Cm a ) ,
+inode creation time
+.Ar ( Y Ns =3D Ns Cm B ) ,
change time
.Ar ( Y Ns =3D Ns Cm c ) ,
or modification time
Index: find.h
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
RCS file: /home/ncvs/src/usr.bin/find/find.h,v
retrieving revision 1.17
diff -u -r1.17 find.h
--- find.h 28 May 2004 17:17:15 -0000 1.17
+++ find.h 24 Mar 2006 12:02:04 -0000
@@ -72,6 +72,8 @@
#define F_IGNCASE 0x00010000 /* iname ipath iregex */
#define F_EXACTTIME F_IGNCASE /* -[acm]time units syntax */
#define F_EXECPLUS 0x00020000 /* -exec ... {} + */
+#define F_TIME_B 0x00040000 /* one of -Btime, -Bnewer, -newerB* */
+#define F_TIME2_B 0x00080000 /* one of -newer?B */
=20
/* node definition */
typedef struct _plandata {
Index: function.c
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
RCS file: /home/ncvs/src/usr.bin/find/function.c,v
retrieving revision 1.54
diff -u -r1.54 function.c
--- function.c 25 Aug 2005 13:44:02 -0000 1.54
+++ function.c 24 Mar 2006 12:02:05 -0000
@@ -234,10 +234,10 @@
} /* nextarg() */
=20
/*
- * The value of n for the inode times (atime, ctime, and mtime) is a range,
- * i.e. n matches from (n - 1) to n 24 hour periods. This interacts with
- * -n, such that "-mtime -1" would be less than 0 days, which isn't what t=
he
- * user wanted. Correct so that -1 is "less than 1".
+ * The value of n for the inode times (atime, birthtime, ctime, mtime) is a
+ * range, i.e. n matches from (n - 1) to n 24 hour periods. This interacts
+ * with -n, such that "-mtime -1" would be less than 0 days, which isn't w=
hat
+ * the user wanted. Correct so that -1 is "less than 1".
*/
#define TIME_CORRECT(p) \
if (((p)->flags & F_ELG_MASK) =3D=3D F_LESSTHAN) \
@@ -248,6 +248,7 @@
*
* True if the difference between the
* file access time (-amin)
+ * file birth time (-Bmin)
* last change of file status information (-cmin)
* file modification time (-mmin)
* and the current time is n min periods.
@@ -261,6 +262,9 @@
} else if (plan->flags & F_TIME_A) {
COMPARE((now - entry->fts_statp->st_atime +
60 - 1) / 60, plan->t_data);
+ } else if (plan->flags & F_TIME_B) {
+ COMPARE((now - entry->fts_statp->st_birthtime +
+ 60 - 1) / 60, plan->t_data);
} else {
COMPARE((now - entry->fts_statp->st_mtime +
60 - 1) / 60, plan->t_data);
@@ -287,6 +291,7 @@
*
* True if the difference between the
* file access time (-atime)
+ * file birth time (-Btime)
* last change of file status information (-ctime)
* file modification time (-mtime)
* and the current time is n 24 hour periods.
@@ -299,6 +304,8 @@
=20
if (plan->flags & F_TIME_A)
xtime =3D entry->fts_statp->st_atime;
+ else if (plan->flags & F_TIME_B)
+ xtime =3D entry->fts_statp->st_birthtime;
else if (plan->flags & F_TIME_C)
xtime =3D entry->fts_statp->st_ctime;
else
@@ -1065,6 +1072,8 @@
return entry->fts_statp->st_ctime > plan->t_data;
else if (plan->flags & F_TIME_A)
return entry->fts_statp->st_atime > plan->t_data;
+ else if (plan->flags & F_TIME_B)
+ return entry->fts_statp->st_birthtime > plan->t_data;
else
return entry->fts_statp->st_mtime > plan->t_data;
}
Index: option.c
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
RCS file: /home/ncvs/src/usr.bin/find/option.c,v
retrieving revision 1.23
diff -u -r1.23 option.c
--- option.c 29 Jul 2004 03:29:44 -0000 1.23
+++ option.c 24 Mar 2006 12:02:05 -0000
@@ -68,6 +68,9 @@
{ "-and", c_and, NULL, 0 },
{ "-anewer", c_newer, f_newer, F_TIME_A },
{ "-atime", c_Xtime, f_Xtime, F_TIME_A },
+ { "-Bmin", c_Xmin, f_Xmin, F_TIME_B },
+ { "-Bnewer", c_newer, f_newer, F_TIME_B },
+ { "-Btime", c_Xtime, f_Xtime, F_TIME_B },
{ "-cmin", c_Xmin, f_Xmin, F_TIME_C },
{ "-cnewer", c_newer, f_newer, F_TIME_C },
{ "-ctime", c_Xtime, f_Xtime, F_TIME_C },
@@ -95,14 +98,22 @@
{ "-name", c_name, f_name, 0 },
{ "-newer", c_newer, f_newer, 0 },
{ "-neweraa", c_newer, f_newer, F_TIME_A | F_TIME2_A },
+ { "-neweraB", c_newer, f_newer, F_TIME_A | F_TIME2_B },
{ "-newerac", c_newer, f_newer, F_TIME_A | F_TIME2_C },
{ "-neweram", c_newer, f_newer, F_TIME_A },
{ "-newerat", c_newer, f_newer, F_TIME_A | F_TIME2_T },
+ { "-newerBa", c_newer, f_newer, F_TIME_B | F_TIME2_A },
+ { "-newerBB", c_newer, f_newer, F_TIME_B | F_TIME2_B },
+ { "-newerBc", c_newer, f_newer, F_TIME_B | F_TIME2_C },
+ { "-newerBm", c_newer, f_newer, F_TIME_B },
+ { "-newerBt", c_newer, f_newer, F_TIME_B | F_TIME2_T },
{ "-newerca", c_newer, f_newer, F_TIME_C | F_TIME2_A },
+ { "-newercB", c_newer, f_newer, F_TIME_C | F_TIME2_B },
{ "-newercc", c_newer, f_newer, F_TIME_C | F_TIME2_C },
{ "-newercm", c_newer, f_newer, F_TIME_C },
{ "-newerct", c_newer, f_newer, F_TIME_C | F_TIME2_T },
{ "-newerma", c_newer, f_newer, F_TIME2_A },
+ { "-newermB", c_newer, f_newer, F_TIME2_B },
{ "-newermc", c_newer, f_newer, F_TIME2_C },
{ "-newermm", c_newer, f_newer, 0 },
{ "-newermt", c_newer, f_newer, F_TIME2_T },
--cNdxnHkX5QqsyA0e--
--St7VIuEGZ6dlpu13
Content-Type: application/pgp-signature
Content-Disposition: inline
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.2.2 (FreeBSD)
iD8DBQFEI+C6ocfcwTS3JF8RAgapAJ4yVyh2JDnop0VBb+iJrY54s9O1oACgl57A
SuKzfyjowVwqbZyaZuO+t6s=
=o0xB
-----END PGP SIGNATURE-----
--St7VIuEGZ6dlpu13--
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20060324120618.GB17507>