cafe-grader-judge-scripts

Commit r128:e73e7e444f1c public

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Description:
added redefine to protect against forbidded functions
Commit status:
[Not Reviewed]
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r128:e73e7e444f1c - - 1 file changed: 19 inserted, 2 deleted

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@@ -15,6 +15,7
15 if ENV['TALKATIVE']!=nil
15 if ENV['TALKATIVE']!=nil
16 puts str
16 puts str
17 end
17 end
18 +
18 if ENV['GRADER_LOGGING']!=nil
19 if ENV['GRADER_LOGGING']!=nil
19 log_fname = ENV['GRADER_LOGGING']
20 log_fname = ENV['GRADER_LOGGING']
20 fp = File.open(log_fname,"a")
21 fp = File.open(log_fname,"a")
@@ -81,15 +82,31
81 params[:prog_lang] = 'c++'
82 params[:prog_lang] = 'c++'
82 end
83 end
83
84
85 + forbidden_functions = ['system', 'fopen', 'freopen', 'open', 'remove', 'rename']
86 + redefine_list = []
87 + forbidden_count = 0
88 + forbidden_key = (rand(8999) + 1000).to_s
89 + forbidden_functions.each do |f|
90 + redefine_list << "-D#{f}=forbidden#{forbidden_key}#{forbidden_count}"
91 + forbidden_count += 1
92 + end
93 + redefine_str = redefine_list.join ' '
94 + puts redefine_str
95 +
84 # Compile.
96 # Compile.
85 case params[:prog_lang]
97 case params[:prog_lang]
86
98
87 when "c"
99 when "c"
88 - command = "#{C_COMPILER} #{params[:source_file]} -o #{params[:output_file]} #{C_OPTIONS} 2> #{params[:message_file]}"
100 + command = "#{C_COMPILER} -E #{params[:source_file]} -o source_prep.c"
101 + system(command)
102 + command = "#{C_COMPILER} source_prep.c #{redefine_str} -o #{params[:output_file]} #{C_OPTIONS} 2> #{params[:message_file]}"
103 + puts command
89 system(command)
104 system(command)
90
105
91 when "c++"
106 when "c++"
92 - command = "#{CPLUSPLUS_COMPILER} #{params[:source_file]} -o #{params[:output_file]} #{CPLUSPLUS_OPTIONS} 2> #{params[:message_file]}"
107 + command = "#{CPLUSPLUS_COMPILER} -E #{params[:source_file]} -o source_prep.cpp"
108 + system(command)
109 + command = "#{CPLUSPLUS_COMPILER} #{redefine_str} #{params[:source_file]} -o #{params[:output_file]} #{CPLUSPLUS_OPTIONS} 2> #{params[:message_file]}"
93 system(command)
110 system(command)
94
111
95 when "pas"
112 when "pas"
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