[英]bash: Expand list of arguments and pass it to find - escaping/white spaces hell
[英]Passing arguments with spaces via list in bash
我對在bash腳本中使用動態生成的參數調用某些函數很感興趣。
但是,如果某些參數有空格,則它似乎不起作用。
讓我們有這個測試腳本:
#!/bin/bash
# file uu.sh
[[ -z $1 ]] || echo '$1' $1
[[ -z $2 ]] || echo '$2' $2
[[ -z $3 ]] || echo '$3' $3
[[ -z $4 ]] || echo '$4' $4
[[ -z $5 ]] || echo '$5' $5
[[ -z $6 ]] || echo '$6' $6
[[ -z $7 ]] || echo '$7' $7
[[ -z $8 ]] || echo '$8' $8
[[ -z $9 ]] || echo '$9' $9
[[ -z $0 ]] || echo '$0' $0
我的任何腳本:
#!/bin/bash
# file vv.sh
ARR=(-x)
ARR+=($1)
ARR+=("$1")
ARR+=("'$1'")
ARR+=("\"$1\"")
bash uu.sh ${ARR[*]}
echo
bash uu.sh "${ARR[*]}"
當調用bash vv.sh "ab"
我得到以下結果:
$2 -x
$2 a
$3 b
$4 a
$5 b
$6 'a
$7 b'
$8 "a
$9 b"
$0 uu.sh
$1 -x a b a b 'a b' "a b"
$0 uu.sh
我期望一種將變量傳遞給uu.sh的方法,例如結果將是:
$1 -x
$2 a b
$0 uu.sh
(通過調用bash uu.sh -xa\\ b
或bash uu.sh -x "ab"
或bash uu.sh -x 'a b'
可以直接獲得它)
您應該具有這樣的vv.sh
,以便能夠將-x
之后的第二個參數中的所有參數傳遞給uu.sh
:
#!/bin/bash
# file vv.sh
ARR=(-x) # initialize array with "-x" as first element
ARR+=("$1") # append 1st argument in second element of array
bash uu.sh "${ARR[@]}" # call uu.sh with quoted and [@]
然后將其用作(請參見引用的參數):
bash vv.sh "a b"
...將作為輸出發出:
$1 -x
$2 a b
$0 uu.sh
這是$*
和$@
之間的區別,而且,您應始終引用變量(除非您知道為什么不想要):)
#uu.sh
[[ -z "$1" ]] || echo '$1' "$1"
[[ -z "$2" ]] || echo '$2' "$2"
[[ -z "$3" ]] || echo '$3' "$3"
[[ -z "$4" ]] || echo '$4' "$4"
[[ -z "$5" ]] || echo '$5' "$5"
[[ -z "$6" ]] || echo '$6' "$6"
[[ -z "$7" ]] || echo '$7' "$7"
[[ -z "$8" ]] || echo '$8' "$8"
[[ -z "$9" ]] || echo '$9' "$9"
[[ -z "$0" ]] || echo '$0' "$0"
和vv.sh
ARR=(-x)
ARR+=($1)
ARR+=("$1")
ARR+=("'$1'")
ARR+=("\"$1\"")
echo 'using quoted ARR[@]'
printf "=%s=\n" "${ARR[@]}"
echo 'using unquoted ARR[@]'
printf "=%s=\n" ${ARR[@]}
echo 'using quoted ARR[*]'
printf "=%s=\n" "${ARR[*]}"
echo 'using unquoted ARR[*]'
printf "=%s=\n" ${ARR[*]}
echo "running UU"
bash uu.sh "${ARR[@]}"
輸出:
using quoted ARR[@]
=-x=
=A=
=B=
=A B=
='A B'=
="A B"=
using unquoted ARR[@]
=-x=
=A=
=B=
=A=
=B=
='A=
=B'=
="A=
=B"=
using quoted ARR[*]
=-x A B A B 'A B' "A B"=
using unquoted ARR[*]
=-x=
=A=
=B=
=A=
=B=
='A=
=B'=
="A=
=B"=
running UU
$1 -x
$2 A
$3 B
$4 A B
$5 'A B'
$6 "A B"
$0 uu.sh
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