christos
862fe20f05
GC old signal handling and merge it in 4 places: ...
1. Immediately ignore all the signals we want to ignore and set the alarm.
2. Before we exit on error, restore all signals we modified
3. Before we exec a shell, restore all signals we modified and ignore TSTP.
Job control aware shells know how to deal with this.
4. Temporarily handle SIGINT while we read motd.
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862fe20f05