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From: hoey@nrl-aic.arpa (Dan Hoey)
Newsgroups: comp.lang.c
Subject: Perror complication
Message-ID: <8913@brl-adm.ARPA>
Date: Thu, 20-Aug-87 15:46:46 EDT
Article-I.D.: brl-adm.8913
Posted: Thu Aug 20 15:46:46 1987
Date-Received: Sat, 22-Aug-87 11:24:27 EDT
Sender: news@brl-adm.ARPA
Lines: 22


    From: der Mouse <mouse@mcgill-vision.uucp>
    Subject: Re: Accessing argc & argv from a functi
    Message-Id: <853@mcgill-vision.UUCP>
    Date: 5 Aug 87 07:33:09 GMT

    ... Well over half of all the calls to perror() I write look like
    perror((char *)0); because the prefix is more complicated than a
    single string, so I have fprintf(stderr,....); before the
    perror().

Then you had better save and restore errno around the call to fprintf,
in case fprint makes a failing syscall.

    Wish perror() were printflike, perhaps like syslog() - syslog()
    accepts a printf format, except that %m means insert
    sys_errlst[errno].

Maybe that's why sendmail sometimes says ``Not a typewriter''?

Dan Hoey
HOEY@NRL-AIC.ARPA