if [ $exit_code -eq 0 ]; then echo “Command executed successfully” else echo “Command failed with exit code: $exit_code” fi “` 在这个例子中,我们使用了ls命令来示范。脚本首先执行ls命令,然后使用$?获取ls命令的返回值并将其赋值给变量exit_code。接下来,使用if语句判断exit_code的值,如果等于...
退出码(exit status,或exit code)的约定: 0表示成功(Zero - Success) 非0表示失败(Non-Zero - Failure) 2表示用法不当(Incorrect Usage) 127表示命令没有找到(Command Not Found) 126表示不是可执行的(Not an executable) >=128 信号产生 man 3 exit 写道 The C standard specifies two constants, EXIT_SU...
<view class="text-grey text-xs"> <button v-if="item.isLeave === 0">离厂解绑</button...
exit ;; 2) echo "功能2已执行!" exit ;; 3) echo "功能3已执行!" exit ;; # 默认选项 4|"") echo "功能4已执行!" exit ;; esac 4、将指定输出内容写入文件 代码语言:javascript 代码运行次数:0 运行 AI代码解释 { echo "hahh" echo "lalal" } > /tmp/test 5、判断变量是否存在或为空...
位运算逻辑运算echo $(( 0&&5 )) #有一个为零(false) 结果是0 echo $(( b && 5 )) # 其中b不是数字,为false 结果是 0 status code exit status(sometimes referred to as areturn statusorexit c…
\$1 $1 \$2 $2 \$3 $3" # 访问传入的参数 echo "the number of parameters: \$# $#" # 传入的参数数量 echo "all parameters: \$@ $@" # 每个参数作为独立字符串 echo "all parameters: \$* $*" # 所有参数合在一个字符串中 pwd # linux 打印当前路径的命令 echo "exit status of the ...
Please submit patches to code or documentation as GitHub pull requests! Check out theDevGuideon the ShellCheck Wiki. Contributions must be licensed under the GNU GPLv3. The contributor retains the copyright. Copyright ShellCheck is licensed under the GNU General Public License, v3. A copy of thi...
log(log_time + ":消息发送失败 返回信息:%s %s\n" % (code, errmsg)) print(log_time + ":消息发送失败 返回信息:%s %s\n" % (code, errmsg)) exit(3) if __name__ == "__main__": text = sys.argv[3] user_info = sys.argv[1] ...
An exit code or a return code results from a process executed on a shell in Linux/UNIX systems. Every Linux/UNIX command returns an exit status, which is represented by an exit code (a number ranging from 0 to 255). When a command returns an exit status “0,” it means the command...
要在命令行中检测和处理选项,您可以使用getopts或getopt命令,或者在Bash脚本中使用$1,$2,$3等位置参数。 使用getopts 命令(适用于Bash脚本): getopts 命令是用于解析命令行选项的Bash内置命令。以下是一个示例,演示了如何在Bash脚本中使用 getopts 来处理选项: ...