Bug #7423: ruby_process_options() dereferences argv even if argc is zero

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: ruby 1.9.3p327 (2012-11-10 revision 37606) [i686-linux]

[gfim (Graham Menhennitt)]

In ruby_process_options(), there is a line:

ruby_script(argv[0]);  /* for the time being */

This dereferences argv whether argc is zero or not. This causes a SEGV if there are no command line args. It should be changed to something like:

ruby_script(argc == 0 ? "ruby" : argv[0]);

In practice, this is unlikely to happen since shells never pass argc as zero. However, it can happen in two situations:

• a program calls something like 'static char argv[] = {0}; execv("/usr/bin/ruby", argv);'
• somebody embedding a ruby interpreter explicitly calls ruby_process_options(0, 0);

Argv is used in a number of other places too. These should all be tested for zero arguments.

[nobu (Nobuyoshi Nakada)]

• Status changed from Open to Closed
• % Done changed from 0 to 100

This issue was solved with changeset r37823.
Graham, thank you for reporting this issue.
Your contribution to Ruby is greatly appreciated.
May Ruby be with you.

---

ruby.c: argv check

• ruby.c (proc_options, process_options, ruby_process_options): take
  care of the case argc is 0, and check if argv has NULL.
  [ruby-core:49889] [Bug #7423]

[RolandH (Roland Hautz)]

This bug fix is neither on the (complete) Roadmap nor reported under the "Bugs unassociated with any target version". I'm afraid it should be reopened in order to get on the radar for a release.