tests/varenv.tests

   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 #
  15 # varenv.sh
  16 #
  17 # Test the behavior of the shell with respect to variable and environment
  18 # assignments
  19 #
  20 expect()
  21 {
  22         echo expect "$@"
  23 }
  24
  25 a=1
  26 b=2
  27 c=3
  28 d=4
  29 e=5
  30 f=6 g=7 h=8
  31
  32 a=3 b=4 $CHMOD $MODE $FN
  33
  34 # This should echo "3 4" according to Posix.2
  35 expect "3 4"
  36 echo $a $b
  37
  38 set -k
  39
  40 # Assignment statements made when no words are left affect the shell's
  41 # environment
  42 a=5 b=6 $CHMOD c=7 $MODE d=8 $FN e=9
  43
  44 expect "5 6 7 8 9"
  45 echo $a $b $c $d $e
  46
  47 $CHMOD f=7 $MODE g=8 $FN h=9
  48 expect "7 8 9"
  49 echo $f $g $h
  50
  51 set +k
  52
  53 # The temporary environment does not affect variable expansion, only the
  54 # environment given to the command
  55
  56 export HOME=/usr/chet
  57 expect $HOME
  58 echo $HOME
  59
  60 expect $HOME
  61 HOME=/a/b/c /bin/echo $HOME
  62
  63 expect $HOME
  64 echo $HOME
  65
  66 # This should echo /a/b/c
  67 expect /a/b/c
  68 HOME=/a/b/c printenv HOME
  69
  70 set -k
  71
  72 # This should echo $HOME 9, NOT /a/b/c 9
  73
  74 expect "$HOME"
  75 HOME=/a/b/c /bin/echo $HOME c=9
  76 expect "$HOME 7"
  77 echo $HOME $c
  78
  79 # I claim the next two echo calls should give identical output.
  80 # ksh agrees, the System V.3 sh does not
  81
  82 expect "/a/b/c 9 /a/b/c"
  83 HOME=/a/b/c $ECHO a=$HOME c=9
  84 echo $HOME $c $a
  85
  86 expect "/a/b/c 9 /a/b/c"
  87 HOME=/a/b/c a=$HOME c=9
  88 echo $HOME $c $a
  89 set +k
  90
  91 # How do assignment statements affect subsequent assignments on the same
  92 # line?
  93 expect "/a/b/c /a/b/c"
  94 HOME=/a/b/c a=$HOME
  95 echo $HOME $a
  96
  97 # The system V.3 sh does this wrong; the last echo should output "1 1",
  98 # but the system V.3 sh has it output "2 2".  Posix.2 says the assignment
  99 # statements are processed left-to-right.  bash and ksh output the right
 100 # thing
 101 c=1
 102 d=2
 103 expect "1 2"
 104 echo $c $d
 105 d=$c c=$d
 106 expect "1 1"
 107 echo $c $d
 108
 109 # just for completeness
 110 unset d c
 111 expect unset
 112 echo ${d-unset}
 113
 114 # no output
 115 export a
 116 a=bcde
 117 export a
 118 /bin/true 2>/dev/null
 119
 120 func()
 121 {
 122         local YYZ
 123
 124         YYZ="song by rush"
 125         echo $YYZ
 126         echo $A
 127 }
 128
 129 YYZ="toronto airport"
 130 A="AVAR"
 131 echo $YYZ
 132 echo $A
 133 A=BVAR func
 134 echo $YYZ
 135 echo $A
 136
 137 export A
 138 # Make sure expansion doesn't use assignment statements preceding a builtin
 139 A=ZVAR echo $A
 140
 141 XPATH=/bin:/usr/bin:/usr/local/bin:.
 142 func2()
 143 {
 144         local z=yy
 145         local -a avar=( ${XPATH//: } )
 146         echo ${avar[@]}
 147         local
 148 }
 149
 150 avar=42
 151 echo $avar
 152 func2
 153 echo $avar
 154
 155 # try to set an attribute for an unset variable; make sure it persists
 156 # when the variable is assigned a value
 157 declare -i ivar
 158
 159 ivar=10
 160
 161 declare -p ivar
 162 unset ivar
 163
 164 # export an unset variable, make sure it is not suddenly set, but make
 165 # sure the export attribute persists when the variable is assigned a
 166 # value
 167 export ivar
 168 echo ${ivar-unset}
 169
 170 ivar=42
 171 declare -p ivar
 172
 173 # make sure set [-+]o ignoreeof and $IGNOREEOF are reflected
 174 unset IGNOREEOF
 175 set +o ignoreeof
 176 set -o ignoreeof
 177 if [ "$IGNOREEOF" -ne 10 ]; then
 178         echo "./varenv.sh: set -o ignoreeof is not reflected in IGNOREEOF" >&2
 179 fi
 180 unset IGNOREEOF
 181 set +o ignoreeof
 182
 183 # older versions of bash used to not reset RANDOM in subshells correctly
 184 [[ $RANDOM -eq $(echo $RANDOM) ]] && echo "RANDOM: problem with subshells"
 185
 186 # make sure that shopt -o is reflected in $SHELLOPTS
 187 # first, get rid of things that might be set automatically via shell
 188 # variables
 189 set +o posix
 190 set +o ignoreeof
 191 set +o monitor
 192 echo $-
 193 echo ${SHELLOPTS}
 194 shopt -so physical
 195 echo $-
 196 echo ${SHELLOPTS}
 197
 198 # and make sure it is readonly
 199 readonly -p | grep SHELLOPTS
 200
 201 # This was an error in bash versions prior to bash-2.04.  The `set -a'
 202 # should cause the assignment statement that's an argument to typeset
 203 # to create an exported variable
 204 unset FOOFOO
 205 FOOFOO=bar
 206 set -a
 207 typeset FOOFOO=abcde
 208
 209 printenv FOOFOO
 210
 211 # test out export behavior of variable assignments preceding builtins and
 212 # functions
 213 $THIS_SH ./varenv1.sub
 214
 215 # more tests; bugs in bash up to version 2.05a
 216 $THIS_SH ./varenv2.sub
 217
 218 # more tests; bugs in bash IFS scoping up through version 4.2
 219 $THIS_SH ./varenv3.sub
 220
 221 # scoping problems with declare -g through bash-4.2
 222 ${THIS_SH} ./varenv4.sub
 223
 224 # more scoping and declaration problems with -g and arrays through bash-4.2
 225 ${THIS_SH} ./varenv5.sub
 226
 227 # variable scoping in the presence of nameref
 228 ${THIS_SH} ./varenv6.sub
 229
 230 # variable declaration problems with arrays and readonly local variables
 231 ${THIS_SH} ./varenv7.sub
 232
 233 # variable visibility problems with process substitution subshells in
 234 # redirections
 235 ${THIS_SH} ./varenv8.sub
 236
 237 # make sure that builtins like readonly and export modify local array variables
 238 # if executed in shell functions, like they modify local scalar variables
 239 ${THIS_SH} ./varenv9.sub
 240
 241 # more tests of unset and local variables with dynamic scoping
 242 ${THIS_SH} ./varenv10.sub
 243
 244 # tests of compound assignments in function scope
 245 ${THIS_SH} ./varenv11.sub
 246
 247 # temporary environment variable propagation and scoping in posix mode
 248 ${THIS_SH} ./varenv12.sub
 249
 250 # temporary environment and invalid shell identifier names
 251 ${THIS_SH} ./varenv13.sub
 252
 253 # localvar_inherit
 254 ${THIS_SH} ./varenv14.sub
 255 ${THIS_SH} ./varenv15.sub
 256 ${THIS_SH} ./varenv16.sub
 257 ${THIS_SH} ./varenv17.sub
 258 ${THIS_SH} ./varenv18.sub
 259 ${THIS_SH} ./varenv19.sub
 260 ${THIS_SH} ./varenv20.sub
 261
 262 # make sure variable scoping is done right
 263 tt() { typeset a=b;echo a=$a; };a=z;echo a=$a;tt;echo a=$a