tests/dollar-at-star

   1 # first, let's start with the basics
   2
   3 recho "$@"
   4 recho "$*"
   5
   6 recho $@
   7 recho $*
   8
   9 foo=$*
  10 foo=$@
  11
  12 foo="$*"
  13 foo="$@"
  14
  15 unset -v bar
  16
  17 foo=${bar:-$*}
  18 foo=${bar:-$@}
  19
  20 foo=${bar:-"$*"}
  21 foo=${bar:-"$@"}
  22
  23 foo=${!*}
  24 foo=${!@}
  25
  26 set a b
  27
  28 recho "$*"
  29
  30 # If IFS is null, the parameters are joined without separators
  31 IFS=''
  32 recho "$*"
  33
  34 # If IFS is unset, the parameters are separated by spaces
  35 unset IFS
  36 recho "${*}"
  37
  38 recho "$@"
  39 recho $@
  40
  41 IFS='/'
  42 set bob 'tom dick harry' joe
  43 set $*
  44 recho $#
  45 recho $1
  46 recho $2
  47 recho $3
  48
  49 set bob 'tom dick harry' joe
  50 set ${*}
  51 recho $#
  52 recho $1
  53 recho $2
  54 recho $3
  55
  56 set bob 'tom dick harry' joe
  57 set $@
  58 recho $#
  59 recho $1
  60 recho $2
  61 recho $3
  62
  63 set bob 'tom dick harry' joe
  64 set ${@}
  65 recho $#
  66 recho $1
  67 recho $2
  68 recho $3
  69
  70 # according to POSIX.2, unquoted $* should expand to multiple words if
  71 # $IFS is null, just like unquoted $@
  72 IFS=''
  73 set bob 'tom dick harry' joe
  74 set $*
  75 recho $#
  76 recho $1
  77 recho $2
  78 recho $3
  79
  80 set bob 'tom dick harry' joe
  81 set $@
  82 recho $#
  83 recho $1
  84 recho $2
  85 recho $3
  86
  87 # if IFS is unset, the individual positional parameters are split on
  88 # " \t\n" if $* or $@ are unquoted
  89 unset IFS
  90 set bob 'tom dick harry' joe
  91 set $*
  92 recho $#
  93 recho $1
  94 recho $2
  95 recho $3
  96
  97 set bob 'tom dick harry' joe
  98 set $@
  99 recho $#
 100 recho $1
 101 recho $2
 102 recho $3
 103
 104 # but not for "$@" or "$*"
 105 set bob 'tom dick harry' joe
 106 set "$*"
 107 recho $#
 108 recho $1
 109 recho $2
 110 recho $3
 111
 112 set bob 'tom dick harry' joe
 113 set "$@"
 114 recho $#
 115 recho $1
 116 recho $2
 117 recho $3
 118
 119 # POSIX.2 says these should both expand the positional parameters
 120 # to multiple words
 121 set a b c d e
 122 IFS=""
 123 recho $@
 124 recho "$@"
 125
 126 # this example is straight from the POSIX.2 rationale
 127 set foo bar bam
 128
 129 recho "$@"
 130 recho "$*"
 131
 132 unset IFS
 133
 134 recho "$@"
 135 recho $@
 136 recho "$*"
 137
 138 IFS=:
 139
 140 # special variables
 141 set -- 1 2 3 4 5 6 7 8 9 10
 142
 143 bar=${*}
 144 foo=$*
 145 echo foo = "$foo"
 146 echo bar = "$bar"
 147
 148 foo1=$@
 149 bar1=${@}
 150
 151 echo foo1 = "$foo1"
 152 echo bar1 = "$bar1"
 153
 154 foo2="$*"
 155 bar2="${*}"
 156
 157 echo foo2 = "$foo2"
 158 echo bar2 = "$bar2"
 159
 160 eval foo3='$*' bar3='${*}'
 161 echo foo3 = "$foo3"
 162 echo bar3 = "$bar3"
 163
 164 case $* in
 165 *\:*)   echo ok 1;;
 166 *)      echo bad 1;;
 167 esac
 168
 169 case $@ in
 170 *\:*)   echo bad 2;;
 171 *)      echo ok 2;;
 172 esac
 173
 174 case "$*" in
 175 *\:*)   echo ok 3;;
 176 *)      echo bad 3;;
 177 esac
 178
 179 case "$@" in
 180 *\:*)   echo bad 4;;
 181 *)      echo ok 4;;
 182 esac
 183
 184 IFS=$' \t\n'
 185
 186 bar=${*}
 187 foo=$*
 188 echo foo = "$foo"
 189 echo bar = "$bar"
 190
 191 foo1=$@
 192 bar1=${@}
 193
 194 echo foo1 = "$foo1"
 195 echo bar1 = "$bar1"
 196
 197 foo2="$*"
 198 bar2="${*}"
 199
 200 echo foo2 = "$foo2"
 201 echo bar2 = "$bar2"
 202
 203 eval foo3='$*' bar3='${*}'
 204 echo foo3 = "$foo3"
 205 echo bar3 = "$bar3"
 206
 207 case $* in
 208 *\ *)   echo ok 1;;
 209 *)      echo bad 1;;
 210 esac
 211
 212 case $@ in
 213 *\ *)   echo ok 2;;
 214 *)      echo bad 2;;
 215 esac
 216
 217 case "$*" in
 218 *\ *)   echo ok 3;;
 219 *)      echo bad 3;;
 220 esac
 221
 222 case "$@" in
 223 *\ *)   echo ok 4;;
 224 *)      echo bad 4;;
 225 esac
 226
 227 # tests for the effect of quoting $* and $@ in an assignment context (plus
 228 # arrays) -- bugs through bash 4.2
 229 ${THIS_SH} ./dollar-at-star1.sub
 230
 231 # more tests for expanding $@ and $* in a context where there is no word
 232 # splitting
 233 ${THIS_SH} ./dollar-at-star2.sub
 234 ${THIS_SH} ./dollar-at-star3.sub
 235 ${THIS_SH} ./dollar-at-star4.sub
 236 ${THIS_SH} ./dollar-at-star5.sub
 237 ${THIS_SH} ./dollar-at-star6.sub
 238 ${THIS_SH} ./dollar-at-star7.sub
 239
 240 # tests for expansions of $@ and ${a[@]} (vs. $* and ${a[*]}) on the RHS of
 241 # assignment statements with non-default IFS: $@ expands to args or array
 242 # members separated by spaces
 243 ${THIS_SH} ./dollar-at-star8.sub
 244
 245 # tests for special expansion of "$*" and "${array[*]}" when used with other
 246 # expansions -- bugs through bash-2.05b
 247 ${THIS_SH} ./dollar-star1.sub
 248
 249 # tests for expansion of "$@" on rhs of things like ${param:+word}.  Bugs
 250 # though bash-2.05b
 251 ${THIS_SH} ./dollar-at1.sub
 252
 253 # tests for expansion of other variables in double-quoted strings containing
 254 # $@.  Bugs through bash-2.05b
 255 ${THIS_SH} ./dollar-at2.sub
 256
 257 # tests for various expansions of $* in different contexts -- word split,
 258 # no splitting, etc. when $IFS is NUL
 259 ${THIS_SH} ./dollar-star2.sub
 260
 261 # tests for expansions of "${array[*]}" and "${array[@]}" when $IFS is not the
 262 # default and the array contains null elements
 263 ${THIS_SH} ./dollar-star3.sub
 264
 265 # test for set -u and expansions of $@ when there are no positional parameters
 266 ${THIS_SH} ./dollar-at3.sub
 267 # test for set -u and expansions of $* when there are no positional parameters
 268 ${THIS_SH} ./dollar-star4.sub
 269
 270 # tests for expansions of $* when IFS is null
 271 ${THIS_SH} ./dollar-star5.sub
 272
 273 # tests for inappropriate word splitting through bash-4.2
 274 ${THIS_SH} ./dollar-at4.sub
 275
 276 # tests for problems with "$@" preceded and followed by other quoted expansions
 277 # through bash-4.2
 278 ${THIS_SH} ./dollar-at5.sub
 279
 280 # tests for problems with "${@:1}" and other expansions with null entries
 281 # in positional parameters
 282 ${THIS_SH} ./dollar-at6.sub
 283
 284 # tests for expansions of $* when $1 == ""; problem through bash-4.2
 285 ${THIS_SH} ./dollar-star6.sub
 286
 287 # tests for expansions of $* (unquoted) when IFS changes (e.g., ${IFS:=-})
 288 # problem through bash-4.2
 289 ${THIS_SH} ./dollar-star7.sub
 290
 291 # tests for expansions of $* (unquoted) when IFS is null and word splitting is
 292 # not going to be performed.
 293 # problem through bash-4.4 in some parameter expansion contexts
 294 ${THIS_SH} ./dollar-star8.sub
 295
 296 # tests for expansions of "$@" when there are no positional parameter or when
 297 # $1 == '' and the expansion is preceded by something that results in a quoted
 298 # null string
 299 ${THIS_SH} ./dollar-at7.sub
 300
 301 # tests for expansions of $* when in an assignment context (no splitting) and
 302 # IFS is null
 303 ${THIS_SH} ./dollar-star9.sub
 304
 305 exit 0