Mac:Abort trap:6

本文讨论了scanf和gets函数在处理未知长度输入时存在的安全问题,由于这两个函数不会检查缓存区大小,可能会导致内存泄漏等问题,因此在编程中应当避免使用。

scanf或gets数组超界

读写都会有缓存区
scanf和gets恰恰是不检查缓存区大小的函数,会存在内存泄漏的安全问题,不建议在未知长度输入时使用这几个函数。

[~HUAWEI]interface 40GE1/0/32 [~HUAWEI-40GE1/0/32]split 4 ^ Error: Unrecognized command found at '^' position. [~HUAWEI-40GE1/0/32]? Current view commands: abort Abort the configuration which committed on a trial basis als Set automatic laser shutdown am Port isolate arp Specify ARP configuration information authentication Authentication unified-mode bpdu BPDU message carrier Set carrier function cfm Connectivity fault management check Check version clear Clear configuration commit Commit the configuration to the system configuration Configuration interlock dcb Data Center Bridging dei Specify dei as drop precedence description Specify interface description device Device information dhcp Dynamic host configuration protocol dhcpv6 Dynamic host configuration protocol for IPv6 display Display current system information dldp Device Link Detection Protocol domain Default domain dot1x 802.1x authentication dual-active Dual-active detection efm Operation, Administration and Maintenance (OAM) in the First Mile of Ethernet (EFM), which is defined in the 802.3ah enable Enable function erps Ethernet ring protection switching eth-trunk Add the interface into an Eth-Trunk fabric-port Fabric-Port interface fault-detect Port fault detection fcoe Specify FCoE configuration information fcoe-port Bind FCoE-Port interface flow-control Configure flow-control operation mode garp Generic Attribute Registration Protocol gvrp GARP VLAN Registration Protocol identity Identity ifg Interval frame gap igmp Specify IGMP parameters ip IP packet ip-subnet-vlan VLAN assignment based on IP subnet jumboframe Set jumbo frame l2protocol-tunnel Layer 2 protocol tunnel lacp Link aggregation control protocol lldp Link Layer Discovery Protocol loop-protect Configure the Layer 2 sub-interface to inherit loop status of the main interface loopback Configure port loopback loopback-detect Loopback detection m-lag Multi-chassis link aggregation group mac-address Mac-address mac-forced-forwarding MAC-Forced Forwarding mac-purge Mac purge configuration mac-vlan MAC-based VLAN mld Specify MLD parameters monitor Monitor multicast Multicast deny vlan netstream NetStream feature ping Send echo messages port Switch port port-isolate Port isolate port-mirroring Mirror feature port-security Port security port-status Port Status portswitch Switch port between router and switch mode protocol-vlan Protocol-based VLAN qinq 802.1Q in 802.1Q qos Quality of service quit Exit from the current command view recover Recover the state of the interface refresh Refresh candidate configuration reset Reset operation restart Restart the specified interface return Exit to user view rmon Specify RMON configuration rmon-statistics Specify RMON statistics run Execute command of user view set Set configuration sflow Sampled flow shutdown Shutdown the specified interface single-fiber Single-fiber communication mode smart-link Smart link configuration information stack-port Stack-Port interface statistics Statistics information storm Storm stp Specify Spanning Tree Protocol (STP) configuration information topology Topology change trace Trace route (switch) to host at the data link layer tracert Trace route to host traffic-filter Traffic filter traffic-mirroring Traffic mirror traffic-policy Apply specific traffic policy traffic-redirect Traffic redirect traffic-statistics Traffic statistics trap-threshold Set trap threshold trill Configure interface parameters for TRILL trust Specify trust parameters undo Cancel the current setting uplink-port Uplink port vlan Virtual LAN [~HUAWEI-40GE1/0/32]
最新发布
08-09
### 关于 `std::abort` 和 `std::cerr` 的用法及区别 #### 使用场景差异 `std::abort()` 函数用于立即终止程序执行并生成核心转储文件(如果操作系统支持)。这通常用来处理不可恢复的错误情况,例如严重的内部逻辑错误或资源耗尽等问题[^1]。 而 `std::cerr` 是标准库提供的一种流对象,专门用于输出错误信息至标准错误设备,默认情况下通常是控制台终端。通过它发送的信息不会被重定向到常规的标准输出(`stdout`)管道中去,因此非常适合报告运行时发生的异常状况给用户知道[^2]。 #### 实际应用对比 当检测到致命性的编程失误时应该调用 `std::abort()`. 下面是一个简单的例子展示如何使用: ```cpp if (!resourceAvailable()) { std::cout << "Critical resource not available!" << std::endl; std::abort(); // Terminate program due to critical failure. } ``` 对于非致命但仍然重要的警告消息,则更适合采用 `std::cerr`, 如下所示: ```cpp try { performOperation(); } catch(const Exception& e) { std::cerr << "Error during operation: " << e.what() << '\n'; handleException(e); // Handle exception without aborting the application. } ``` #### 主要特点总结 - **`std::abort`:** - 终止整个应用程序。 - 可能会创建一个核心转储供调试分析。 - 不返回任何值;一旦调用了就不会再继续正常流程。 - **`std::cerr`:** - 向标准错误流写入数据。 - 输出的内容可以被捕获和记录下来以便后续查看。 - 支持链式操作符<<语法糖来简化字符串拼接过程。
评论 1
成就一亿技术人!
拼手气红包6.0元
还能输入1000个字符
 
红包 添加红包
表情包 插入表情
 条评论被折叠 查看
添加红包

请填写红包祝福语或标题

红包个数最小为10个

红包金额最低5元

当前余额3.43前往充值 >
需支付:10.00
成就一亿技术人!
领取后你会自动成为博主和红包主的粉丝 规则
hope_wisdom
发出的红包
实付
使用余额支付
点击重新获取
扫码支付
钱包余额 0

抵扣说明:

1.余额是钱包充值的虚拟货币,按照1:1的比例进行支付金额的抵扣。
2.余额无法直接购买下载,可以购买VIP、付费专栏及课程。

余额充值