All together now
Last modified
Signals Recap
Some comments after going through last week’s quiz results:
- The only thing dated about HUP is its name. It is still used in a meaningful way. Just like “The Rule of Silence”, what started as a technology constraint has persisted, evolving when necessary to adapt to modern technology and usage patterns.
- If we wanted to answer the question “how does program X respond to HUP”, what could we do?
Everything is a File (Descriptor)
Diagram from Advanced Programming in the UNIX Environment, by W. Richard Stevens. (eBook available if signed into VT Libraries)
Some examples:
/dev/pts/N/proc/cpuinfo/sys/class/backlight/acpi_video0/brightness