Author: dwmalone
Date: Sun Mar 3 20:10:56 2013
New Revision: 247730
URL: http://svnweb.freebsd.org/changeset/base/247730
Log:
Add an option for finding sparse files.
Reviewed by: iedowse
MFC after: 3 weeks
Modified:
head/usr.bin/find/extern.h
head/usr.bin/find/find.1
head/usr.bin/find/function.c
head/usr.bin/find/option.c
Modified: head/usr.bin/find/extern.h
==============================================================================
--- head/usr.bin/find/extern.h Sun Mar 3 19:31:44 2013 (r247729)
+++ head/usr.bin/find/extern.h Sun Mar 3 20:10:56 2013 (r247730)
@@ -73,6 +73,7 @@ creat_f c_regex;
creat_f c_samefile;
creat_f c_simple;
creat_f c_size;
+creat_f c_sparse;
creat_f c_type;
creat_f c_user;
creat_f c_xdev;
@@ -109,6 +110,7 @@ exec_f f_prune;
exec_f f_quit;
exec_f f_regex;
exec_f f_size;
+exec_f f_sparse;
exec_f f_type;
exec_f f_user;
Modified: head/usr.bin/find/find.1
==============================================================================
--- head/usr.bin/find/find.1 Sun Mar 3 19:31:44 2013 (r247729)
+++ head/usr.bin/find/find.1 Sun Mar 3 20:10:56 2013 (r247730)
@@ -816,6 +816,10 @@ terabytes (1024 gigabytes)
.It Cm P
petabytes (1024 terabytes)
.El
+.It Ic -sparse
+True if the current file is sparse,
+i.e. has fewer blocks allocated than expected based on its size in bytes.
+This might also match files that have been compressed by the filesystem.
.It Ic -type Ar t
True if the file is of the specified type.
Possible file types are as follows:
@@ -997,7 +1001,7 @@ and
as well as
.Ic -amin , -anewer , -cmin , -cnewer , -delete , -empty , -fstype ,
.Ic -iname , -inum , -iregex , -ls , -maxdepth , -mindepth , -mmin ,
-.Ic -path , -print0 , -regex
+.Ic -path , -print0 , -regex, -sparse
and all of the
.Ic -B*
birthtime related primaries are extensions to
Modified: head/usr.bin/find/function.c
==============================================================================
--- head/usr.bin/find/function.c Sun Mar 3 19:31:44 2013
(r247729)
+++ head/usr.bin/find/function.c Sun Mar 3 20:10:56 2013
(r247730)
@@ -1497,6 +1497,29 @@ c_size(OPTION *option, char ***argvp)
}
/*
+ * -sparse functions --
+ *
+ * Check if a file is sparse by finding if it occupies fewer blocks
+ * than we expect based on its size.
+ */
+int
+f_sparse(PLAN *plan __unused, FTSENT *entry)
+{
+ off_t expected_blocks;
+
+ expected_blocks = (entry->fts_statp->st_size + 511) / 512;
+ return entry->fts_statp->st_blocks < expected_blocks;
+}
+
+PLAN *
+c_sparse(OPTION *option, char ***argvp __unused)
+{
+ ftsoptions &= ~FTS_NOSTAT;
+
+ return palloc(option);
+}
+
+/*
* -type c functions --
*
* True if the type of the file is c, where c is b, c, d, p, f or w
Modified: head/usr.bin/find/option.c
==============================================================================
--- head/usr.bin/find/option.c Sun Mar 3 19:31:44 2013 (r247729)
+++ head/usr.bin/find/option.c Sun Mar 3 20:10:56 2013 (r247730)
@@ -145,6 +145,7 @@ static OPTION const options[] = {
{ "-regex", c_regex, f_regex, 0 },
{ "-samefile", c_samefile, f_inum, 0 },
{ "-size", c_size, f_size, 0 },
+ { "-sparse", c_sparse, f_sparse, 0 },
{ "-true", c_simple, f_always_true, 0 },
{ "-type", c_type, f_type, 0 },
{ "-uid", c_user, f_user, 0 },
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