2005/01/18 plutil

Mac OS X: checks the syntax of property list files. In your ~/Library/Preferences folder (and in /Library/Preferences) are lots of little XML files that tell apps and system programs how to act. You can read a bit more about them at /MacOSX/configxml.html, at /MacOSX/twosafaris.html and at /Basics/basicxml.html Personally, I have never (yet) had any problem with a preferences file, but it is suggested that you run plutil now and then to verify integrity. To do so, you'd just:



sudo plutil -s ~//Library/Preferences/*.plist /Library/Preferences/*plist



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I've also read that plutil can think there's a problem where there is none, though I've never experienced that either. It's not a bad idea to keep safe copies of known good plist files where you cabn get at them quickly if necessary.

This can also convert plist files to a binary format or back to the ordinary text format. Should you every come across a binary format plist, "file" may not recognize it as such:



$ cat foo.plist
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
        <key>NSTreatUnknownArgumentsAsOpen</key>
        <string>NO</string>
</dict>
</plist>
$ cp foo.plist foosafe.plist
$ file *plist
foo.plist:     ASCII text
foosafe.plist: ASCII text
$ plutil -convert binary1 foo.plist
$ file *plist
foo.plist:     \<head                   HTML document text
foosafe.plist: ASCII text
$ od -c foo.plist
0000000    b   p   l   i   s   t   0   0 321 001 002   _ 020 035   N   S
0000020    T   r   e   a   t   U   n   k   n   o   w   n   A   r   g   u
0000040    m   e   n   t   s   A   s   O   p   e   n   R   N   O  \b 013
0000060    +  \0  \0  \0  \0  \0  \0 001 001  \0  \0  \0  \0  \0  \0  \0
0000100  003  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0
0000120    .                                                            
0000121
$ plutil -convert xml1 foo.plist
$ diff *.plist         
$ 



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