Walter Harms wrote, quoting Ralph Corderoy: >> ... if you've a grep that produces >> 1E6 lines and you just want to read the first then pipe it into >> `sed 1q' before reading it into awk so the grep gets a SIGPIPE on >> writing to the finished sed, curtailing its largess. > > To access head or tail of a ascii file the 'head' and 'tail' commands > are what you are looking at (prevents reading the whole file just to > get the result).
And if the one line you are looking for is somewhere between 1E5 and 2E5, in the 1E6 lines of the original stream? ... | grep pattern | sed 1q will get the first line which matches pattern, regardless of where it appears in the stream, which I think, is what Ralph said. Regards, Keith. _______________________________________________ Groff mailing list Groff@gnu.org http://lists.gnu.org/mailman/listinfo/groff
