I'm having problems with an in place edit on a file. I'm hoping someone can shed some light on a solution. The file I'm attempting to in-line edit has this sort of format:- 
nfs 1 active (followed by a variable number of words)
tempfs 2 active (followed by a variable number of words)
ufs 0 locked (followed by a variable number of words)
.
.
and so on

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I'm changing the second field only like this :- 
   local @ARGV = ("diskmon");
   local $^I = '.bak';
   while (<>) {
     m/^(\w+)\s+(\d+)$/;
     printf "$1 %d %s\n", exists $disk{$1} ? 0 : $2+$partition;
   }

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This is giving me :- 
nfs 1
tmpfs 6
ufs 2

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Whilst the second field has been changed as required, I've lost the rest of the record. I know I'm doing something dumb ??

In reply to In place edit and printf by Anonymous Monk

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