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
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 ...
#!/bin/bash if [ $# -ne 1 ] then echo "please input parameter" return 1 fi 上面的脚本如果直接执行则会报如下错误: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 return: can only`return' from a function or sourced script 但是如果使用 . 或 souce的方式被包含到父Shell中,则可以正常运...
在javascript中return (function())和return true的区别 Sender,From和Return-Path之间有什么区别? 将Iterator向前移动到for语句和while语句之间的区别 之间的区别??和|| Python break/return子集总和的递归函数 XSLT中的Break语句 "return view“和"return make:view”有什么区别? CSS中"word-break:break-all"与"wo...
TinCanTechchanged the titlebashism: bash: return: can only `return' from a function or sourced scriptJul 11, 2023 TinCanTechaddedVersion 3.1.6Version 3.1.xand removedVersion 3.1.6labelsJul 11, 2023 TinCanTechadded this to thev3.1.6milestoneJul 11, 2023 ...
在Shell脚本中,当你遇到错误 /root/.bashrc: line 6: return: can only return' from a function or sourced script,这表示你尝试在一个非函数或未被source命令引入的脚本中使用了return`命令。下面是对此问题的详细分析和解答: 1. 解释错误信息的含义 错误信息表明return命令只能在函数内部或者通过source命令引入...
这是一个Linux shell的问题。 就bash而言, return命令只能用在函数中，不能直接用在脚本中（不能直接用在脚本终端），当脚本用source a1.sh（或者 . a1.sh）执行时，可以用在脚本中。（ return: can only`return' from a function or sourced script）下面的内容，摘自<<实用Linux Shell编程>>...
For example, using the BASH shell, the following code sets the PATH variable to myPath, then calls the system command command with that value. system(['export PATH=' myPath ' ; ' command]) To execute the operating system command in the background, include the trailing character, &, in...
/bin/bash num=$# function return_test() { if [ $num == 0 ];then return 22 fi } return_test echo $? [root@kibana ~]# sh 22 [root@kibana ~]# sh 11 0 [root@kibana ~]# 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11....
For example, using the BASH shell, the following code sets the PATH variable to myPath, then calls the system command command with that value. system(['export PATH=' myPath ' ; ' command]) To execute the operating system command in the background, include the trailing character, &, in...