When a signal is caught, the current command being executed attempts to complete before the trap command takes over.

在捕捉到信号后，正在执行的当前命令会尝试在trap接管之前结束执行。

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The first trap command causes the stopsleep function to be run whenever a SIGCHLD, SIGINT, or SIGTERM signal is received.

第一个trap命令将使stopsleep函数在接受到SIGCHLD、SIGINT或SIGTERM信号时运行。

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The trap command prevents the script from being interrupted by the user (by pressing control-C during boot, for example) while the script executes.

trap命令防止用户在脚本执行时中断(例如，在引导时键入control - c)脚本。

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A message displays containing the line number and command when the trap was caught; the script then exits (from the exit command on the trap command list).

在捕捉到trap后，会显示一条包含行号和命令的消息；脚本随后将退出执行(使用trap命令列表中的exit命令)。

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A message displays containing the line number and command when the trap was caught; the script then exits (from the exit command on the trap command list).

在捕捉到trap后，会显示一条包含行号和命令的消息；脚本随后将退出执行(使用trap命令列表中的exit命令)。

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