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Warn on access/modify of $SAFE, and remove effects of modifying $SAFE

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This removes the security features added by $SAFE = 1, and warns for access
or modification of $SAFE from Ruby-level, as well as warning when calling
all public C functions related to $SAFE.

This modifies some internal functions that took a safe level argument
to no longer take the argument.

rb_require_safe now warns, rb_require_string has been added as a
version that takes a VALUE and does not warn.

One public C function that still takes a safe level argument and that
this doesn't warn for is rb_eval_cmd.  We may want to consider
adding an alternative method that does not take a safe level argument,
and warn for rb_eval_cmd.
This commit is contained in:
Jeremy Evans 2019-09-20 19:06:22 -07:00
parent 7b6a8b5b54
commit c5c05460ac
Notes: git 2019-11-18 08:01:15 +09:00
59 changed files with 283 additions and 751 deletions
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spec/ruby/language/predefined_spec.rb
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@ -771,8 +771,6 @@ __LINE__ String The current line number in the source file. [r/
$LOAD_PATH Array A synonym for $:. [r/o]
$-p Object Set to true if the -p option (which puts an implicit while gets . . . end
loop around your program) is present on the command line. [r/o]
$SAFE Fixnum The current safe level. This variable’s value may never be
reduced by assignment. [thread] (Not implemented in Rubinius)
$VERBOSE Object Set to true if the -v, --version, -W, or -w option is specified on the com-
mand line. Set to false if no option, or -W1 is given. Set to nil if -W0
was specified. Setting this option to true causes the interpreter and some