Escapes a string so that it can be safely used in a Bourne shell command line.
Note that a resulted string should be used unquoted and is not intended for use in double quotes nor in single quotes.
open("| grep #{Shellwords.escape(pattern)} file") { |pipe| # ... }
+String#shellescape+ is a shorthand for this function.
open("| grep #{pattern.shellescape} file") { |pipe| # ... }
# File lib/mail/core_extensions/shell_escape.rb, line 24 def escape_for_shell(str) # An empty argument will be skipped, so return empty quotes. return "''" if str.empty? str = str.dup # Process as a single byte sequence because not all shell # implementations are multibyte aware. str.gsub!(/([^A-Za-z0-9_\s\+\-.,:\/@])/, "\\\\\\1") # A LF cannot be escaped with a backslash because a backslash + LF # combo is regarded as line continuation and simply ignored. str.gsub!(/\n/, "'\n'") return str end
Escapes a string so that it can be safely used in a Bourne shell command line.
Note that a resulted string should be used unquoted and is not intended for use in double quotes nor in single quotes.
open("| grep #{Shellwords.escape(pattern)} file") { |pipe| # ... }
+String#shellescape+ is a shorthand for this function.
open("| grep #{pattern.shellescape} file") { |pipe| # ... }
# File lib/mail/core_extensions/shell_escape.rb, line 24 def escape_for_shell(str) # An empty argument will be skipped, so return empty quotes. return "''" if str.empty? str = str.dup # Process as a single byte sequence because not all shell # implementations are multibyte aware. str.gsub!(/([^A-Za-z0-9_\s\+\-.,:\/@])/, "\\\\\\1") # A LF cannot be escaped with a backslash because a backslash + LF # combo is regarded as line continuation and simply ignored. str.gsub!(/\n/, "'\n'") return str end