This reproduces on grep 3.1 on Ubuntu. The command:
grep -f - should accept a list of patterns from standard input, like this: $ grep -f - pat1 pat2 pat3 [Ctrl-D] Upon receiving the EOF indication (zero byte read), the program should immediately conclude that the list of patterns has ended, and begin processing the input using the patterns. This does not seem to be working. After a single Ctrl-D, grep is still accumulating patterns: It appears that Ctrl-D must be issued twice: $ grep -f - pat1 [Ctrl-D] ;; effectively ignored pat2 ;; can add more patterns pat3 [Ctrl-D] [Ctrl-D] ;; OK, now we are in the matching loop. pat3blahblah pat3blahblah ... Cheers ...
