tests/varenv12.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 set -o posix
  15
  16 fn() { foo=abc : ; typeset +x foo; printenv|grep ^foo=; }
  17
  18 fn
  19 unset -v foo
  20 unset -f fn
  21
  22 func1() {
  23   var=1
  24   var=2 :       # or 'var=2 return', or another special builtin
  25   unset -v var
  26   echo $FUNCNAME: var = $var
  27 }
  28 func2() {
  29   func1
  30   unset -v var  # bug: fails silently
  31 }
  32 func1
  33 echo ${var+"BUG: still set 1"}
  34
  35 unset var
  36 func2
  37 echo ${var+"BUG: still set 2"}
  38
  39 unset -v var
  40 unset -f func1 func2
  41
  42 fn() { foo=abc : ; typeset +x foo; echo -n 'inside: ' ; declare -p foo; }
  43 fn
  44 echo outside:
  45 declare -p foo
  46
  47 unset -v foo
  48 unset -f fn
  49
  50 func()
  51 {
  52         var=value declare -x var
  53         echo -n 'inside: ' ; declare -p var
  54 }
  55
  56 var=one
  57 func
  58 echo -n 'outside: ' ; declare -p var
  59
  60 unset -v var
  61 unset -f func
  62
  63 # this will probably change behavior; export shouldn't behave like this when
  64 # not in posix mode and the sequencing is probably wrong in posix mode. since
  65 # export is a special builtin, the variable assignment should modify the
  66 # local variable, as if a standalone assignment statement had been executed
  67 # (posix modifying "the current execution environment") leaving the global
  68 # variable unchanged. all shells, including bash, modify the local variable;
  69 # bash was the only one that propagates the value out to the calling
  70 # environment, but no longer does so.
  71
  72 func()
  73 {
  74         local var=inside
  75         var=value export var
  76         echo -n 'inside: ' ; declare -p var
  77 }
  78
  79 var=outside
  80 func
  81 echo -n 'outside: ' ; declare -p var
  82
  83 unset -v var
  84 unset -f func
  85
  86 func()
  87 {
  88         local var=local
  89         var=inside :
  90         echo -n 'inside: ' ; declare -p var
  91 }
  92
  93 var=outside
  94 func
  95 echo -n 'outside: ' ; declare -p var
  96
  97 unset -v var
  98 unset -f func
  99
 100 func()
 101 {
 102         echo -n 'inside func: ' ; echo "var=${var-<unset>}"
 103 }
 104
 105 unset -v var
 106 var=one :
 107 echo -n 'outside 1.0: ' ; echo "var=${var-<unset>}"
 108
 109 unset -v var
 110 var=one eval ':'
 111 echo -n 'outside 1.1: ' ; echo "var=${var-<unset>}"
 112
 113 unset -v var
 114
 115 var=two func
 116 echo -n 'outside 2.0: ' ; echo "var=${var-<unset>}"
 117 var=global
 118 var=two func
 119 echo -n 'outside 2.1: ' ; echo "var=${var-<unset>}"
 120
 121 unset -v var
 122 unset -f func
 123
 124 func1()
 125 {
 126         var=value export var
 127         echo -n 'inside func1: ' ; echo "var=${var-<unset>}"
 128 }
 129
 130 var=outside
 131 func1
 132 echo -n 'outside 3.0: ' ; echo "var=${var-<unset>}"
 133
 134 unset -v var
 135 unset -f func1
 136
 137 func2()
 138 {
 139         local var=local
 140         var=global :
 141         echo -n 'inside func2: ' ; echo "var=${var-<unset>}"
 142 }
 143
 144 var=outside
 145 func2
 146 echo -n 'outside 4.0: ' ; echo "var=${var-<unset>}"
 147
 148 unset -v var
 149 unset -f fecho foo bar
 150
 151 fecho() {
 152     echo $var
 153 }
 154
 155 foo() {
 156     local var="foo: bye bye"
 157     var="foo: hello world" fecho
 158 }
 159
 160 bar() {
 161     var="bar: hello world" fecho
 162 }
 163
 164 var=global
 165 var=outside foo
 166 echo after foo: var=$var
 167 var=global
 168 var=outside bar
 169 echo after bar: var=$var
 170
 171 unset -v var