Web是一个特殊变量,用来获取上一个命令的退出状态,或者上一个函数的返回值。. 所谓退出状态,就是上一个命令执行后的返回结果。. 退出状态是一个数字,一般情况下,大部分命 … Web示例4: sendHciCommand. # 或者: from socket import timeout [as 别名] def sendHciCommand(self, opcode, data, timeout=2): """ Send an arbitrary HCI packet by pushing a send-task into the sendQueue. This function blocks until the response is received or the timeout expires. The return value is the Payload of the HCI Command Complete …
shell 命令设置超时时间 - 腾讯云开发者社区-腾讯云
WebSep 23, 2024 · For instance, there is the timeout command, part of the GNU coreutils package. The timeout command stops an executed process after the timeout period: $ timeout 1s bash -c 'for((;;)); do :; done' $ echo $? 124. Here, we run an endless loop. We set a timeout of one second before timeout should kill the process. Importantly, note the exit … WebMar 18, 2024 · shell获取返回值的方法有多种,这里介绍两种:第一种是直接执行command然后获取返回值;第二种是包装成function并获取返回值。这种比较简单,也 … tiffany\u0027s leeds
Timeout a command in bash without unnecessary delay
WebJun 7, 2024 · You could add an “s,” but it really makes no difference. To use a time value measured in minutes, hours or days add an “m,” an “h,” or a “d.”. To have ping run for three minutes, use the following command: timeout 3m ping 192.168.4.28. ping will run for three minutes before timeout steps in and halts the ping session. WebJun 30, 2016 · Linux system函数返回值. 简介: 例: [cpp] view plain copy status = system ("./test.sh"); 1、先统一两个说法: (1)system返回值:指调用system函数后的返回值,比如上例中status为system返回值 (2)shell返回值:指system所调用的shell命令的返回值,比如上例中,test.sh中返回的值为 ... WebJun 28, 2024 · 1 实现思路. 在Shell开发中会存在脚本执行出现超时的现象,需要限制命令的执行时间。. 通过 timeout 限制命令执行时间,同时通过 $? 来获取命令是否超时执行失 … tiffany\u0027s lawn and garden