dos2unix permission problem

Hi All,

I want to use the command "dos2unix" to format the file line break from win to unix,
but after changing the file permission has been change to 600.
how can i keep the original permisson after formatting?

Many thz

-h --help 
Print online help. 
-k --keepdate 
Keep the date stamp of output file same as input file. 
-q --quiet 
Quiet mode. Suppress all warning and messages. 
-V --version 
Prints version information. 
-c --convmode convmode 
Sets conversion mode. Where convmode is one of: ASCII, 7bit, ISO, Mac with ASCII being the default. Simulates dos2unix under SunOS. 
-o --oldfile file ... 
Old file mode. Convert the file and write output to it. The program default to run in this mode. Wildcard names may be used. 
-n --newfile infile outfile ... 
New file mode. Convert the infile and write output to outfile. File names must be given in pairs and wildcard names should NOT be used or you WILL lost your files.

There doesn't look like an option to do it in the program.

What is your umask set to?

my root a/c umask is 0022
thz