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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@@ -12,12 +12,13
12 12 ##############################
13 13
14 14 def talk(msg)
15 15 if ENV['TALKATIVE']!=nil
16 16 puts str
17 17 end
18 +
18 19 if ENV['GRADER_LOGGING']!=nil
19 20 log_fname = ENV['GRADER_LOGGING']
20 21 fp = File.open(log_fname,"a")
21 22 fp.puts("run: #{Time.new.strftime("%H:%M")} #{msg}")
22 23 fp.close
23 24 end
@@ -78,21 +79,37
78 79 end
79 80
80 81 if params[:prog_lang]=='cpp':
81 82 params[:prog_lang] = 'c++'
82 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 96 # Compile.
85 97 case params[:prog_lang]
86 98
87 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
89 104 system(command)
90 105
91 106 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]}"
93 110 system(command)
94 111
95 112 when "pas"
96 113 command = "#{PASCAL_COMPILER} #{params[:source_file]} -ooutpas #{PASCAL_OPTIONS} > #{params[:message_file]}"
97 114 system(command)
98 115 FileUtils.mv("output", params[:output_file])
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