Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!yale!cmcl2!kramden.acf.nyu.edu!brnstnd
From: brnstnd@kramden.acf.nyu.edu (Dan Bernstein)
Newsgroups: comp.unix.questions
Subject: Re: Signal handlers and errno
Message-ID: <5482:Jan422:54:4191@kramden.acf.nyu.edu>
Date: 4 Jan 91 22:54:41 GMT
References: <25390@adm.brl.mil>
Organization: IR
Lines: 10

In article <25390@adm.brl.mil> MANNS%DBNPIB5.BITNET@cunyvm.cuny.edu (Jochen Manns, PI der Uni Bonn, 732738/3611) writes:
  [ a signal handler may modify errno ]
>         For now I keep track on 'errno' in the signal handler but I
>         want to ask you if there is no better method to solve such
>         problems.

Saving and restoring errno is the correct method. The only ``better''
solution is not to make system calls inside handlers in the first place.

---Dan