henry (08/26/82)
Figured out a way to test whether login(1) is being invoked from the top level or not: testing whether its parent is process #1 is not quite 100% right, but close enough for all practical purposes. Changed login to refuse to cooperate if getppid() != 1. Took the opportunity to do some minor cleanup in the code and check usage a bit more closely.
henry@utzoo.UUCP (Henry Spencer) (10/30/84)
Login(1) has been changed to initialize the ME environment variable.
The immediate reason is for some shell command-usage experiments,
although it may prove useful in general since at present everyone's
.profile contains an explicit initialization for ME.
--
Henry Spencer @ U of Toronto Zoology
{allegra,ihnp4,linus,decvax}!utzoo!henry