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An architecture note on awk's FS and OFS: requirements for safe field splitting, the smallest correct design, portability traps across gawk/nawk/mawk, and the checks that catch silent field shifts.
When both -F and -v FS= are provided on the awk command line, the effective field separator may depend on the awk implementation and the relative order of the arguments. Some implementations prioritize one mechanism over the other, while older variants disregard -v for FS assignment entirely. The POSIX specification does not standardize this interaction, lea
Design goal is a low-traffic, single-pass log aggregation that keeps resident memory bounded while using field splitting and an END block for final totals. The script relies on awk's line-by-line processing and dynamic FS for record parsing. Associative arrays are required for keyed counts, so memory growth with unique keys is a design constraint. Portabilit
awk