UNIX in a Nutshell: System V Edition

UNIX in a Nutshell: System V EditionSearch this book
Previous: Reference: ipcsChapter 2
UNIX Commands
Next: Reference: join


ismpx [option]

Test whether standard input is running under layers. (Command name comes from "Is the multiplexor running?") Output is either yes (exit status 0) or no (exit status 1). Useful for shell scripts that send programs to a windowing terminal or depend on screen size.



Suppress output and return exit status only.

Example shell script

if ismpx -s
then jwin

Previous: Reference: ipcsUNIX in a Nutshell: System V EditionNext: Reference: join
Reference: ipcsBook IndexReference: join

The UNIX CD Bookshelf NavigationThe UNIX CD BookshelfUNIX Power ToolsUNIX in a NutshellLearning the vi Editorsed & awkLearning the Korn ShellLearning the UNIX Operating System