Vulnerabilities exist at entry and exit points in the system.

弱点存在于系统的入口和出口。

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Example: Probe at exit of read system call all processes.

示例：读取系统调用所有进程的出口的探针。

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Puts a probe on the exit system call to exit when the process exits.

在exit系统调用上设置探查，从而在进程退出时退出。

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After 10 years, people with provisional legal status could apply for permanent residency if the new security and fencing plans were operating, a new mandatory employment verification system was in place, and a new electronic exit system was tracking who leaves the country.

NPR: GOP: Stronger Borders Or Immigration Bill Will Die

The electronic exit system is meant to keep better track of people in the country on temporary visas.

NPR: AP Source: Senate Plan To Stiffen Border Security

People living here illegally could begin to get green cards in 10 years, but only if a new southern border security plan is in place, employers have adopted mandatory electronic verification of their workers' legal status and a new electronic exit system is operating at airports and seaports.

NPR: AP Source: Senate Plan To Stiffen Border Security