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Red Hat Bugzilla – Attachment 145276 Details for
Bug 222177
File::writable? gives incorrect result if process changes euid/egid
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Ruby script demonstrating the problem (run as root)
w.rb (text/plain), 645 bytes, created by
David Lutterkort
on 2007-01-10 19:09:33 UTC
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Description:
Ruby script demonstrating the problem (run as root)
Filename:
MIME Type:
Creator:
David Lutterkort
Created:
2007-01-10 19:09:33 UTC
Size:
645 bytes
patch
obsolete
>#! /usr/bin/ruby > >def write_check(writable, dir) > if writable > puts " Writable" > begin > File::open("#{dir}/xxx", "w") { |f| f.puts "Yo" } > rescue > puts " FAIL - Failed to create file in writable dir" > end > else > puts " PASS - Not writable" > end >end > >unless Process.uid == 0 > puts "This test makes only sense as root" > exit(1) >end > >dir = `mktemp -dt writableXXXXX`.chomp >File::chmod(0755, dir) > >Process.egid=1 >Process.euid=1 > >puts "Test File::writable?" >write_check(File::writable?(dir), dir) > >puts "Test File::stat.writable?" >write_check(File::stat(dir).writable?, dir)
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bug 222177
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