如何将默认值传递给标志

发布于 2025-02-12 10:34:41 字数 594 浏览 0 评论 0原文

我需要将默认值传递到-c -t -u标志。在-ci中需要无限在-ti中需要1秒在-u中，defauls是

#!/bin/bash

set -u

print_usage(){
echo "usage: script[-c] [-t] [-u] exe-name"
}
if [[ $# -eq 0 ]]; then
print_usage
exit 1
fi

while getopts :c:t:u: flag; do
case $flag in
c) counts=$OPTARG;;
t) timeout=$OPTARG;;
u) user_name=$OPTARG;;
esac
done

if [ $counts==true ]
    then
top -n ${counts}
    fi
if [ $timeout==true ]
    then
top -d ${timeout}
    fi
if [ $user_name==true ]
    then
top -u ${user_name}
    fi

我试图将类似的用户放在杰出的情况下，但它不起作用：

counts=
timeout=1
user_name=.

原文

I need to pass defaults to the -c -t -u flags.
in the -c i need that to be infinite
in the -t i need that to be 1 sec
and in the -u the defauls is ANY user

#!/bin/bash

set -u

print_usage(){
echo "usage: script[-c] [-t] [-u] exe-name"
}
if [[ $# -eq 0 ]]; then
print_usage
exit 1
fi

while getopts :c:t:u: flag; do
case $flag in
c) counts=$OPTARG;;
t) timeout=$OPTARG;;
u) user_name=$OPTARG;;
esac
done

if [ $counts==true ]
    then
top -n ${counts}
    fi
if [ $timeout==true ]
    then
top -d ${timeout}
    fi
if [ $user_name==true ]
    then
top -u ${user_name}
    fi

I tried to put something like that in the biginning but it doesn't work:

counts=
timeout=1
user_name=.

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暗藏城府 2025-02-19 10:34:41

在循环之前，将默认值分配给变量。

将数组用于可以容纳多个参数的变量。请参阅出于原因，请使用bash 设置一个参数。

然后，您可以执行具有所有参数合并的单个top命令。

#!/bin/bash

set -u

print_usage(){
    echo "usage: script [-c repetitions] [-t timeout] [-u username] exe-name"
}
if [[ $# -eq 0 ]]; then
    print_usage
    exit 1
fi

counts=()
timeout=(-d 1)
user_name=()

while getopts :c:t:u: flag; do
    case $flag in
        c) counts=(-n "$OPTARG");;
        t) timeout=(-d "$OPTARG");;
        u) user_name=(-u "$OPTARG");;
    esac
done

top "${counts[@]}" "${timeout[@]}" "${user_name[@]}"

Assign default values to the variables before the while loop.

Use arrays for variables that can hold multiple arguments. See Setting an argument with bash for the reasons.

You can then execute a single top command that has all the arguments combined.

#!/bin/bash

set -u

print_usage(){
    echo "usage: script [-c repetitions] [-t timeout] [-u username] exe-name"
}
if [[ $# -eq 0 ]]; then
    print_usage
    exit 1
fi

counts=()
timeout=(-d 1)
user_name=()

while getopts :c:t:u: flag; do
    case $flag in
        c) counts=(-n "$OPTARG");;
        t) timeout=(-d "$OPTARG");;
        u) user_name=(-u "$OPTARG");;
    esac
done

top "${counts[@]}" "${timeout[@]}" "${user_name[@]}"

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