Checking return values (was: Trojan Horses, NFS, etc.)

[Richard Tobin]

In article <1990Oct25.075856.4923 at robobar.co.uk> ronald at robobar.co.uk (Ronald S H Khoo) writes:
>For those of you still puzzled: perror() must be called *immediately* after
>the error returns

Or else you must save and restore errno.  Is this guaranteed to work?

-- Richard

-- 
Richard Tobin,                       JANET: R.Tobin at uk.ac.ed             
AI Applications Institute,           ARPA:  R.Tobin%uk.ac.ed at nsfnet-relay.ac.uk
Edinburgh University.                UUCP:  ...!ukc!ed.ac.uk!R.Tobin