On Sun, Nov 1, 2020 at 9:10 PM David Čepelík <[email protected]> wrote: > I've noticed an interesting discrepancy between gawk and BusyBox awk: > when the FS is set to e.g. ` *` (space asterisk), gawk will not consider > empty matches of the regular expression (see e.g. [1]) while BusyBox > will. This example demonstrates it: > > ~% gawk --version > GNU Awk 5.1.0, API: 3.0 (GNU MPFR 4.1.0, GNU MP 6.2.0) > [...] > ~% echo 'foo bar' | gawk -F' *' '{print $1}' > foo > > While BusyBox (a7c065354) will produce: > > 1! ~/sw/3rd/busybox:master% echo 'foo bar' | ./busybox awk -F' *' '{print > $1}' > f > > Is this desired behavior? To my best knowledge, this isn't standardized. > Would it make sense to harmonize BusyBox's implementation with GNU Awk? > > This caused a problem in a 3rd-party script I was using and which > stopped working after being migrated to Alpine Linux. > > Please let me know if I can provide further details. I'm happy to > provide a patch if that's the desired solution.
Yes, following gawk is likely to be most useful for the users. Please send the patch. _______________________________________________ busybox mailing list [email protected] http://lists.busybox.net/mailman/listinfo/busybox
