echo"Current $FUNCNAME, \$FUNCNAME => (${FUNCNAME[@]})"}functionanother_func(){echo"Current $FUNCNAME, \$FUNCNAME => (${FUNCNAME[@]})"}echo"Out of function, \$FUNCNAME => (${FUNCNAME[@]})"test_func echo"Out of
bash脚本退出代码解释 Exit Codes With Special Meanings Table E-1.ReservedExit Codes According to the above table, exit codes1 - 2, 126 - 165, and 255[1]have special meanings, and should therefore be avoided for user-specified exit parameters. Ending a script withexit 127would certainly cause...
A bash function can return a value via its exit status after execution. By default, a function returns the exit code from the last executed command inside the function. It will stop the function execution once it is called. You can use the return builtin command to return an arbitrary numb...
cat demo.txt</dev/null 注:linux中有一个经典名言【一切皆文件】,/dev/null可以认为是一个特殊的空文件,更形象点,可以理解为科幻片中的黑洞,任何信息重向定输出到它后,便有去无回,当然黑洞里也没有信息能出来。 综合来讲,上面的意思就是利用<将黑洞做为demo.txt的标准输入,黑洞里没任何内容,任何文件里的...
简介： SubMenu：代表一个子菜单，包含1~N个MenuItem 实现效果： 具体实现方法： 主活动 MainActivity： public class MainActivity extends AppCompatActivity { //定义 “字体大小” 菜单项的标识 final int FONT_10 = 0x111; final int FONT_12 = 0x112; final int FONT_14 = 0x113; f...
($3+$4)) echo "sum is $sum" } param_function A B 2 3 5 # output: Hello World # parameter 1: A # parameter 2: B # parameters : A B 2 3 5 7 # sum is 5 # 可以看到, 即使函数内没使用参数也可以传递, 若使用了不存在的参数, 如 $4, 则默认为空 (不是空格) print_Hello2(...
Code:#!/bin/bash # Define the factorial function factorial() { local num=$1 local result=1 # Check if num is negative if [ $num -lt 0 ]; then echo "Error: Factorial is not defined for negative numbers" exit 1 fi # Calculate factorial for ((i = 1; i <= num; i++)); do ...
avoids polluting the global name space and inadvertently setting variables that may have significance outside the function. Declaration and assignment must be separate statements when the assignment value is provided by a command substitution; as the local builtin does not propagate the exit code from...
function question(query?: string, options?: QuestionOptions): Promise<string> type QuestionOptions = { choices: string[] } 复制代码 1. 2. 3. sleep() 基于setTimeout 函数 await sleep(1000) 复制代码 1. 2. nothrow() 将$ 的行为更改, 如果退出码不是0,不跑出异常. ...
regex`trap'exit 42'sigint# Unportable signal speccmd &> file# Unportable redirection operatorreadfoo < /dev/tcp/host/22# Unportable intercepted filesfoo-bar() { ..; }# Undefined/unsupported function name[$UID= 0 ]# Variable undefined in dash/shlocalvar=value# local is undefined in shtim...