1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119
|
# first, let's start with the basics
recho "$@"
recho "$*"
recho $@
recho $*
set a b
recho "$*"
# If IFS is null, the parameters are joined without separators
IFS=''
recho "$*"
# If IFS is unset, the parameters are separated by spaces
unset IFS
recho "${*}"
recho "$@"
recho $@
IFS='/'
set bob 'tom dick harry' joe
set $*
recho $#
recho $1
recho $2
recho $3
set bob 'tom dick harry' joe
set ${*}
recho $#
recho $1
recho $2
recho $3
set bob 'tom dick harry' joe
set $@
recho $#
recho $1
recho $2
recho $3
set bob 'tom dick harry' joe
set ${@}
recho $#
recho $1
recho $2
recho $3
# according to POSIX.2, unquoted $* should expand to multiple words if
# $IFS is null, just like unquoted $@
IFS=''
set bob 'tom dick harry' joe
set $*
recho $#
recho $1
recho $2
recho $3
set bob 'tom dick harry' joe
set $@
recho $#
recho $1
recho $2
recho $3
# if IFS is unset, the individual positional parameters are split on
# " \t\n" if $* or $@ are unquoted
unset IFS
set bob 'tom dick harry' joe
set $*
recho $#
recho $1
recho $2
recho $3
set bob 'tom dick harry' joe
set $@
recho $#
recho $1
recho $2
recho $3
# but not for "$@" or "$*"
set bob 'tom dick harry' joe
set "$*"
recho $#
recho $1
recho $2
recho $3
set bob 'tom dick harry' joe
set "$@"
recho $#
recho $1
recho $2
recho $3
# POSIX.2 says these should both expand the positional parameters
# to multiple words
set a b c d e
IFS=""
recho $@
recho "$@"
# this example is straight from the POSIX.2 rationale
set foo bar bam
recho "$@"
recho "$*"
unset IFS
recho "$@"
recho $@
recho "$*"
|