tests/redir7.sub

   1 #   This program is free software: you can redistribute it and/or modify
   2 #   it under the terms of the GNU General Public License as published by
   3 #   the Free Software Foundation, either version 3 of the License, or
   4 #   (at your option) any later version.
   5 #
   6 #   This program is distributed in the hope that it will be useful,
   7 #   but WITHOUT ANY WARRANTY; without even the implied warranty of
   8 #   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   9 #   GNU General Public License for more details.
  10 #
  11 #   You should have received a copy of the GNU General Public License
  12 #   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  13 #
  14 # weird redirections that caused trouble and were fixed in post-3.0 bash
  15 stuff()
  16 {
  17         c=1
  18         ( sleep 5 < /dev/null >/dev/null 2>&1 & ) &
  19 }
  20
  21 exec 3>&1
  22 eval `
  23 exec 4>&1 >&3 3>&-
  24 {
  25         stuff 4>&-
  26         echo "c=$c" >&4
  27 }`
  28 echo c1 is $c
  29
  30 unset -f stuff
  31
  32 stuff()
  33 {
  34         c=2
  35         ( sleep 5 < /dev/null >/dev/null 2>&1 & )
  36 }
  37
  38 exec 3>&1
  39 eval `
  40 exec 4>&1 >&3 3>&-
  41 {
  42         stuff 4>&-
  43         echo "c=$c" >&4
  44 }`
  45 echo c2 is $c
  46
  47 unset -f stuff
  48
  49 stuff()
  50 {
  51         c=3
  52         { sleep 5 < /dev/null >/dev/null 2>&1 & } &
  53 }
  54
  55 exec 3>&1
  56 eval `
  57 exec 4>&1 >&3 3>&-
  58 {
  59         stuff 4>&-
  60         echo "c=$c" >&4
  61 }`
  62 echo c3 is $c
  63
  64 unset -f stuff
  65
  66 stuff()
  67 {
  68         c=4
  69         { sleep 5 < /dev/null >/dev/null 2>&1 & }
  70 }
  71
  72 exec 3>&1
  73 eval `
  74 exec 4>&1 >&3 3>&-
  75 {
  76         stuff 4>&-
  77         echo "c=$c" >&4
  78 }`
  79 echo c4 is $c
  80
  81 # fixed in bash-3.1
  82 echo 'exec <&3' | ${THIS_SH} 3<&0