awk is rewritten to follow gawk 5.2

Bashkit’s awk was rewritten to target gawk 5.2, Debian’s awk. It covers POSIX awk plus the gawk extensions scripts commonly use; system(), output pipes and cmd | getline run through the sandbox shell. Number output, printf, the rand() sequence, leftmost-longest regex matching, diagnostics and options follow gawk. gawk, mawk and nawk run the same builtin.

On Bashkit’s Debian-oracle awk tests, the pass rate went from 51.5% to 93.8%. Resource caps still apply, and split and record splitting count against the memory cap.

See the compatibility scorecard, #2583 and #2561.