Jira (PUP-10122) Only collect checksum metadata for links pointing to files

Title: Message Title

Josh Cooper commented on

It seems to hang on ruby MRI too... at least File.read:

require 'tempfile'

dir = '/tmp/dir'

link = '/tmp/link'

File.unlink(link) if File.exist?(link)

Dir.mkdir(dir) unless File.directory?(dir)

link = File.symlink(dir, link)

puts "Opening"

File.open(link, File::RDONLY) do |fh|

  puts "Opened"

  puts fh.read

  puts "Done"

end

# strace -f ruby linkbug.rb

...

[pid 14513] stat("/tmp/link", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0

[pid 14513] unlink("/tmp/link")         = 0

[pid 14513] stat("/tmp/dir", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0

[pid 14513] symlink("/tmp/dir", "/tmp/link") = 0

[pid 14513] writev(1, [{iov_base="Opening", iov_len=7}, {iov_base="\n", iov_len=1}], 2Opening

) = 8

[pid 14513] fcntl(0, F_GETFL)           = 0x2 (flags O_RDWR)

[pid 14513] ioctl(0, TCGETS, {B38400 opost isig icanon echo ...}) = 0

[pid 14513] writev(1, [{iov_base="Opened", iov_len=6}, {iov_base="\n", iov_len=1}], 2Opened

) = 7

[pid 14513] fstat(0, {st_mode=S_IFCHR|0600, st_rdev=makedev(136, 0), ...}) = 0

[pid 14513] read(0,

# ruby is hung here ^

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