如何修復以下print_error功能：
#!/bin/bash
script_name="tmp.bash"
function print_error {
format="$1"
shift
printf "%s: ERROR: %s\n" "$script_name" "$format" "$@"
}
print_error "Today is %s; tomorrow is %s" "$(date)" "$(date -d " 1 day")"
以便它輸出：
tmp.bash: ERROR: Today is Mon Nov 22 15:10:40 PST 2021; tomorrow is Tue Nov 23 15:10:50 PST 2021
目前，它輸出：
tmp.bash: ERROR: Today is %s; tomorrow is %s
Mon Nov 22 15:10:40 PST 2021: ERROR: Tue Nov 23 15:10:50 PST 2021
print_error 應該能夠接受可變數量的引數。
uj5u.com熱心網友回復：
使用中間變數（此處substr）構建功能訊息（日期訊息）和技術訊息（錯誤訊息）的第二個構建：
#! /bin/bash
declare -r script_name="tmp.bash"
function print_error {
local substr=
printf -v substr "$1" "${@:2}"
printf "%s: ERROR: %s\n" "$script_name" "$substr"
}
print_error "Today is %s; tomorrow is %s" "$(date)" "$(date -d " 1 day")"
然后，您可以將功能構建和技術構建分開：
#! /bin/bash
declare -r script_name="tmp.bash"
function print_tech_error () {
printf "%s: ERROR: %s\n" "$script_name" "$1"
}
function print_fct_error {
local substr=
printf -v substr "$1" "${@:2}"
print_tech_error "${substr}"
}
print_fct_error "Today is %s; tomorrow is %s" "$(date)" "$(date -d " 1 day")"
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