No trouble at all, just a slightly different incantation.

print -l ./**/*.txt | xargs grep '\.\.\.\.'

(well, no trouble except that if your filenames may have spaces in them you'll need to use `-N' rather than `-l' and a GNUish xargs --null, but I digress . . .).

In reply to Re: Re^3: Find file that contains "....." (command in Unix) by Fletch
in thread Find file that contains "....." (command in Unix) by Anonymous Monk

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