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Filter files in place

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Use one of these nifty utilities to automatically process files in-place. Both store the results of programs which write to stdout until they are done, and then write the result. See also `sed`'s `-i` option. Be aware that this may clobber your files if an error occurs during processing, so it is best to back them up (though `reservoir` refuses to truncate files to nothing by default).

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  1. # Example 1: capitalisation
  2. tr a-z A-Z < xy.txt | reservoir -o xy.txt
  3. tr a-z A-Z < xy.txt | sponge xy.txt
  4.  
  5. # Example 2: evaluate #ifdefs of all C files in directory
  6. # unifdef is from http://dotat.at/prog/unifdef/
  7. # MAKE A BACKUP BEFORE RUNNING THIS LOOP, YOUR FILES WILL BE OVERWRITTEN!
  8. find . -iname \*.c | while read file ; do unifdef $file | reservoir -o $file ; done

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