另外Bash规定了返回值的范围是0-255,超出这个范围的值对256取模再返回;如果要返回的值可能在这个范围之外,比如查找指定进程的id或者当前的网络连接数,这种做法就是在给自己挖坑了。 Shell中的function,本质是脚本内的脚本,传参数的方式与向脚本传参数的方式一致,同样return的含义与脚本中exit的含义也是一样的,目的都...
function return_string(){ local local_str_var="Java2Blog" echo "Welcome to $local_str_var" } return_string OUTPUT 1 2 3 Welcome to Java2Blog Using Global Variable Use a global variable to return string from function in Bash. Use Global Variable 1 2 3 4 5 6 7 8 global_str_...
Bash cannot return values, whether a single value or an array, but it can return a status (the same as other programs). However, there are multiple turnarounds that we can use to return an array from a function. Let’s explore them below. Using nameref Feature To return the entire ar...
The variables in bash are global by default and accessible from anywhere, including function bodies. Variables defined inside a function are also global. Adding the keywordlocalmakes the term accessible only within the function and the child functions/processes. In dynamic scoping, a local variable ...
在Shell脚本中,当你遇到错误 /root/.bashrc: line 6: return: can only return' from a function or sourced script,这表示你尝试在一个非函数或未被source命令引入的脚本中使用了return`命令。下面是对此问题的详细分析和解答: 1. 解释错误信息的含义 错误信息表明return命令只能在函数内部或者通过source命令引入...
The process inherits the stdin, stdout, and stderr from... Bash - Builtin Commands builtin refers to: a builtin command. See or to the specific builtin command. See (useful when defining a function whose name is the same as a shell builtin) The builtin command execute the specified...
#!/bin/bash if [ $# -ne 1 ] then echo "please input parameter" return 1 fi 上面的脚本如果直接执行则会报如下错误: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 return: can only`return' from a function or sourced script 但是如果使用 . 或 souce的方式被包含到父Shell中,则可以正常运...
这是一个Linux shell的问题。 就bash而言, return命令只能用在函数中，不能直接用在脚本中（不能直接用在脚本终端），当脚本用source a1.sh（或者 . a1.sh）执行时，可以用在脚本中。（ return: can only`return' from a function or sourced script）下面的内容，摘自<<实用Linux Shell编程>>...
TinCanTechchanged the titlebashism: bash: return: can only `return' from a function or sourced scriptJul 11, 2023 TinCanTechaddedVersion 3.1.6Version 3.1.xand removedVersion 3.1.6labelsJul 11, 2023 TinCanTechadded this to thev3.1.6milestoneJul 11, 2023 ...
函数内部的return语句用于终止函数的执行并返回一个值。当程序执行到return语句时,函数将立即停止执行,并将return语句后面的表达式的值作为函数的返回值。这个返回值可以被调用该函数的其他代码...