Short:        OpenBSD grep pattern search for AmigaOS
Author:       James Howard / Dag-Erling Smorgrav (ported by Duncan Bowring)
Uploader:     duncan bowring us
Type:         util/cli
Version:      1.68
Replaces:     util/cli/grep.lha
Architecture: m68k-amigaos >= 3.0
URL:          https://github.com/bdgscotland/amiport

grep ? OpenBSD grep (pattern search) for AmigaOS

Original author: James Howard / Dag-Erling Smorgrav
Ported by Duncan Bowring using amiport (AI-assisted porting toolkit).
Project: https://github.com/bdgscotland/amiport

Cross-compiled with m68k-amigaos-gcc for AmigaOS 3.x (68000+).
Tested in vamos emulator and FS-UAE (Amiga 1200).

Usage:
  grep [options] pattern [file ...]

  grep hello file.txt          Search for "hello" in file.txt
  grep -i HELLO file.txt       Case-insensitive search
  grep -n pattern file.txt     Show line numbers
  grep -v pattern file.txt     Show non-matching lines
  grep -c pattern file.txt     Count matching lines
  grep -E "foo|bar" file.txt   Extended regex (alternation)
  grep -F "a.b" file.txt       Fixed string (no regex)
  grep -R pattern dir          Recursive directory search
  grep -B2 -A2 pattern file    Show 2 lines before/after match

Exit codes (Amiga-native):
  0  = match found (RETURN_OK)
  5  = no match found (RETURN_WARN)
  10 = error (RETURN_ERROR)

Note: -Z (decompress) is not supported (no zlib on AmigaOS).

Includes full source code (original POSIX and ported Amiga versions)
and PORT.md documenting every transformation applied.