ettomatic / xattr Goto Github PK

Sample program, where File is not found.

require "xattr"
xattr = XAttr.new(ARGV[0])
puts xattr.keys

Run using,

$ shards build
$ ./bin/xattrtest nonexisting.txt
[]

If I print error number then it is properly set.

require "xattr"
xattr = XAttr.new(ARGV[0])
puts xattr.keys
puts Errno.value

$ ./bin/xattrtest nonexisting.txt
[]
ENOENT

Please raise exceptions in case of failures. Like this https://github.com/crystal-lang/crystal/blob/5999ae29b/src/file/error.cr#L8

From the libxattr man page(Mac)

On success, the size of the extended attribute name list is returned. If no accessible extended attributes are associated with the given path or fd, the function returns zero. On failure, -1 is returned and the global variable errno is set as follows.