# Setting \_\_FILE\_\_ impossible with rb\_eval\_string() - hack ide **URL:** \ **Category:** Ruby\ **Created:** [January 2, 2007, 3:40am UTC](https://www.ruby-forum.com/t/setting-file-impossible-with-rb-eval-string-hack-ide/80922 "2007-01-02T03:40:46Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![John-Mason\_PSShack](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/94ad74/32.png) [@John-Mason\_PSShack](https://www.ruby-forum.com/u/John-Mason_PSShack)\ **Post date:** [January 2, 2007, 3:40am UTC](https://www.ruby-forum.com/t/setting-file-impossible-with-rb-eval-string-hack-ide/80922/1 "2007-01-02T03:40:46Z")
In the following C code: int main(const int argc, const char \*\* argv){ ruby\_init(); ruby\_init\_loadpath(); ruby\_script(argv[0]); ruby\_sourcefile = rb\_source\_filename(argv[0]); rb\_eval\_string(“puts **FILE** ”); /\* → returns (eval) wanted argv[0] \*/ rb\_eval\_string(“puts $0”); return 0; } my attempts to to set a value for **FILE** fail because rb\_eval\_string resets it to “(eval)” every time as shown below: ----- eval.c ----- 01600 VALUE 01601 rb\_eval\_string(str) 01602 const char \*str; 01603 { 01604 VALUE v; 01605 NODE \*oldsrc = ruby\_current\_node; 01606 01607 ruby\_current\_node = 0; 01608 ruby\_sourcefile = rb\_source\_filename(“(eval)”); 01609 v = eval(ruby\_top\_self, rb\_str\_new2(str), Qnil, 0, 0); 01610 ruby\_current\_node = oldsrc; 01611 01612 return v; 01613 } Can anyone suggest a clever hack ( C novice here ) so that I can reset **FILE** to argv[0]? I thought that perhaps I could just call eval directly but I can’t seem to grab ruby\_top\_self from within the context of my application, but I am a C ignoramus so I may be missing something obvious. ## I’d be grateful for any pointers (he, he). John-Mason Shackelford Software Developer Pearson Educational Measurement 2510 North Dodge St. Iowa City, IA 52245 ph. 319-354-9200x6214 removed\_email\_address@domain.invalid [http://pearsonedmeasurement.com](http://pearsonedmeasurement.com)