fork download
copy 
  1. f()                     # Wrapped in a function to verify all test cases.
  2. {
  3. 	[[ $2 = /* ]]||p=$1
  4. 	realpath -sm $p/$2
  5. 	unset p             # Not required in a full program.
  6. }
  7.  
  8. f "/a/b/c"      "d"
  9. f "/a/b/c/"     "d"
  10. f "/a/b/c/"     "d/"
  11. f "/a/b/c"      "/d"
  12. f "/a/b/c"      "/d/"
  13. f "/../a/b/c/"  "d"
  14. f "/a/../b/c/"  "d"
  15. f "/a/b/../c"   "d"
  16. f "/a/b/c/.."   "d"
  17. f "/a/b/c/"     ".."
  18. f "/a/b/c"      "../d"
  19. f "/a/b/c"      "/../d"
  20. f "/a/b/c"      ""
  21. f "/a/b/c"      "."
  22. f "/a/b/c"      "./d"
  23. f "/a/b/c"      "/./d"
  24. f "/a/b/c"      "d.txt"
  25. f "/a/b/c"      "d."
  26. f "/a/b/c"      ".txt"
  27. f "/a/b/c"      ".txt/d"
  28. f "/a/b/."      "./././."
  29. f "/direc"      "tory"
  30. f "/a-_.b/"     "__._-."
  31. f "/a/b"        "../.."
  32. f "/a/b"        "../../.."
  33. f "/a"          "../../.."
  34. f "/"           ""
  35. f "/"           "a"
  36. f "/.."         "a"
  37. f "/."          ""
Success #stdin #stdout 0s 5080KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
/a/b/c/d
/a/b/c/d
/a/b/c/d
/d
/d
/a/b/c/d
/b/c/d
/a/c/d
/a/b/d
/a/b
/a/b/d
/d
/a/b/c
/a/b/c
/a/b/c/d
/d
/a/b/c/d.txt
/a/b/c/d.
/a/b/c/.txt
/a/b/c/.txt/d
/a/b
/direc/tory
/a-_.b/__._-.
/
/
/
/
/a
/a
/
https://ideone.com/4z04WP
language:
Bash (bash 5.0.3)
created:
7 years ago
visibility:
secret

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!