Add mksparse.

2 files changed, 57 insertions, 0 deletions

diff --git a/mksparse b/mksparse
new file mode 100755
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+++ b/mksparse
@@ -0,0 +1,26 @@
+#!/usr/bin/python
+
+import cliapp
+
+
+class MakeSparseFile(cliapp.Application):
+
+    def add_settings(self):
+        self.settings.add_bytesize_setting(['size'],
+                                           'size of whole to append to file')
+
+    def process_args(self, filenames):
+        if self.settings['size'] > 0:
+            for filename in filenames:
+                self.append_hole(filename, self.settings['size'])
+            
+    def append_hole(self, filename, size):
+        f = open(filename, 'r+b')
+        f.seek(size - 1, 2)
+        print 'pos:', f.tell()
+        f.write('\0')
+        f.close()
+    
+    
+if __name__ == '__main__':
+    MakeSparseFile().run()
diff --git a/mksparse.1 b/mksparse.1
new file mode 100644
index 0000000..e7b54e4
--- /dev/null
+++ b/mksparse.1
@@ -0,0 +1,31 @@
+.\" Copyright 2011 Lars Wirzenius <liw@liw.fi>
+.\" 
+.\" This program is free software: you can redistribute it and/or modify
+.\" it under the terms of the GNU General Public License as published by
+.\" the Free Software Foundation, either version 3 of the License, or
+.\" (at your option) any later version.
+.\" 
+.\" This program is distributed in the hope that it will be useful,
+.\" but WITHOUT ANY WARRANTY; without even the implied warranty of
+.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+.\" GNU General Public License for more details.
+.\" 
+.\" You should have received a copy of the GNU General Public License
+.\" along with this program.  If not, see <http://www.gnu.org/licenses/>.
+.\"
+.TH MKSPARSE 1
+.SH NAME
+mksparse \- add a hole to the end of a file
+.SH SYNOPSIS
+.B mksparse
+.RB [ \-\-size =\fISIZE\fR]
+.SH DESCRIPTION
+.B mksparse
+appends a "whole" to the end of an existing file.
+It appends one real NUL byte at the end of the whole.
+.SH OPTIONS
+.TP
+.BR \-\-size "=\fISIZE"
+Size of the whole to append.
+The actual size is one byte less.
+