[Bug 165042] Re: dash shell stdin handling not POSIX

[a7x]

Still a problem in raring.

** Changed in: dash (Ubuntu)
       Status: Invalid => Confirmed

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to dash in Ubuntu.
https://bugs.launchpad.net/bugs/165042

Title:
  dash shell stdin handling not POSIX

Status in “dash” package in Ubuntu:
  Confirmed

Bug description:
  Standard Input is not being handled according to the POSIX spec
  for a POSIX 'sh'

  $ (echo "(sed -e s/a/d/);"; echo abc)  | bash -s
  dbc
  $ (echo "(sed -e s/a/d/);"; echo abc)  | dash -s
  dash: abc: not found
  $ 

  ksh handles this correctly, as does zsh  and /usr/xpg4/bin/sh on
  OpenSolaris

  The relevant citation is this
  http://www.opengroup.org/onlinepubs/009695399/utilities/sh.html

  STDIN
  -----
      The standard input shall be used only if one of the
      following is true:
          * The -s option is specified.
          * The -c option is not specified and no operands are specified.
          * The script executes one or more commands that require input
            from standard input (such as a read command that does not
            redirect its input).

  See the INPUT FILES section.
     
  When the shell is using standard input and it invokes a command that
  also uses standard input, the shell shall ensure that the standard
  input file pointer points directly after the command it has read when the
  command begins execution. It shall not read ahead in such a manner that
  any characters intended to be read by the invoked command are consumed
  by the shell (whether interpreted by the shell or not) or that characters
  that are not read by the invoked command are not seen by the shell. When
  the command expecting to read standard input is started asynchronously
  by an interactive shell, it is unspecified whether characters are read
  by the command or interpreted by the shell.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/dash/+bug/165042/+subscriptions