Skip to main content

40 Operating System Interface

This chapter is about starting and getting out of Emacs, access to values in the operating system environment, and terminal input, output.

See Building Emacs, for related information. See Display, for additional operating system status information pertaining to the terminal and the screen.

Starting Up  Customizing Emacs startup processing.
Getting Out  How exiting works (permanent or temporary).
System Environment  Distinguish the name and kind of system.
User Identification  Finding the name and user id of the user.
Time of Day  Getting the current time.
Time Zone Rules  Rules for time zones and daylight saving time.
Time Conversion  Converting among timestamp forms.
Time Parsing  Converting timestamps to text and vice versa.
Processor Run Time  Getting the run time used by Emacs.
Time Calculations  Adding, subtracting, comparing times, etc.
Timers  Setting a timer to call a function at a certain time.
Idle Timers  Setting a timer to call a function when Emacs has been idle for a certain length of time.
Terminal Input  Accessing and recording terminal input.
Terminal Output  Controlling and recording terminal output.
Sound Output  Playing sounds on the computer’s speaker.
X11 Keysyms  Operating on key symbols for X Windows.
Batch Mode  Running Emacs without terminal interaction.
Session Management  Saving and restoring state with X Session Management.
Desktop Notifications  Desktop notifications.
File Notifications  File notifications.
Dynamic Libraries  On-demand loading of support libraries.
Security Considerations  Running Emacs in an unfriendly environment.