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In the early days of coal mining, workers had to rely on rudimentary tools such as picks, shovels, and wheelbarrows to extract coal from the earth. These tools were not only labor-intensive but also posed significant safety risks. Miners worked in cramped, dark conditions, often exposed to harmful gases and the risk of cave-ins. Despite the dangers, their dedication to extracting coal was unwavering, driven by the growing demand for this vital energy source.

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Manipulation of the grp stack is achieved through system calls such as setgid(), getgid(), and initgroups()grp stack. These calls allow a program to adjust its gids according to its needs, enabling it to perform tasks with varying degrees of privilege. For instance, a server handling files owned by different groups might switch its EGID to match the file's group before performing operations, ensuring proper access control.

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