Feature #21872: `-S` with directory separator

• Status: Closed
• Assignee: -
• Target version: -

[nobu (Nobuyoshi Nakada)]

Ruby’s -S option searches the script from $RUBYPATH and $PATH always:

$ mkdir -p a/test
$ echo 'p $0' > a/test/t.rb
$ chmod +x a/test/t.rb
$ PATH=$PWD/a:$PATH ruby -S test/t.rb

However, I don't think this action is intentional, because Perl’s -S doesn't search $PATH as stated at https://perldoc.perl.org/perlrun#-S:

makes Perl use the "PATH" environment variable to search for the program unless the name of the program contains path separators.

$ mkdir -p a/test
$ echo 'print $0, "\n"' > a/test/t.pl
$ chmod +x a/test/t.pl
$ PATH=$PWD/a:$PATH perl -S test/t.pl
Can't open perl script "test/t.pl": No such file or directory

This is same in sh:

$ echo 'echo $0' > a/test/t.sh
$ chmod +x a/test/t.sh
$ PATH=$PWD/a:$PATH sh -c test/t.sh
sh: test/t.sh: No such file or directory

[nobu (Nobuyoshi Nakada)]

• Tracker changed from Misc to Feature

Matz thinks old Perl didn't see the separator and it changed then probably because of security improvements.
We agreed that also Ruby should follow it.

[nobu (Nobuyoshi Nakada)]

• Status changed from Open to Closed

Applied in changeset git|f486ee340289b779654fe2d6c1de5a348fd76d86.

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[Feature #21872] Search script from $PATH only if no separator