The example supports many options.

egrep.pl --help

Options for Many-Core Engine:
  --max-workers=NUM         override max workers (default auto)
                              e.g. auto, auto-2, 4

  --chunk-size=NUM[KM]      override chunk size (default 4M)
                              minimum: 200K; maximum: 20M

Usage: egrep.pl [OPTION]... PATTERN [FILE] ...
Search for PATTERN in each FILE or standard input.
Example: egrep.pl -i 'hello world' menu.h main.c

Regexp selection and interpretation:
  -e, --regexp=PATTERN      use PATTERN as a regular expression
  -i, --ignore-case         ignore case distinctions

Miscellaneous:
  -s, --no-messages         suppress error messages
  -v, --invert-match        select non-matching lines
      --help                display this help and exit

Output control:
  -m, --max-count=NUM       stop after NUM matches
  -n, --line-number         print line number with output lines
  -H, --with-filename       print the filename for each match
  -h, --no-filename         suppress the prefixing filename on output
  -q, --quiet, --silent     suppress all normal output
  -R, -r, --recursive       equivalent to --directories=recurse
      --include=PATTERN     files that match PATTERN will be examined
      --exclude=PATTERN     files that match PATTERN will be skipped
      --exclude-from=FILE   files that match PATTERN in FILE will be s
+kipped
      --exclude-dir=PATTERN directories that match PATTERN will be ski
+pped
                            requires a recent egrep binary for --exclu
+de-dir
  -L, --files-without-match only print FILE names containing no match
  -l, --files-with-matches  only print FILE names containing matches
  -c, --count               only print a count of matching lines per F
+ILE

With no FILE, or when FILE is -, read standard input. If less than
two FILEs given, assume -h. Exit status is 0 if match, 1 if no match,
and 2 if trouble.
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