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From: J Wunsch <j@uriah.heep.sax.de>
Message-Id: <199601282226.XAA03630@uriah.heep.sax.de>
Subject: Re: sysexits.h. which EX_ to use
To: freebsd-hackers@freebsd.org (FreeBSD hackers)
Date: Sun, 28 Jan 1996 23:26:37 +0100 (MET)
Reply-To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch)
In-Reply-To: <199601281744.EAA18411@godzilla.zeta.org.au> from "Bruce Evans" at Jan 29, 96 04:44:52 am
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As Bruce Evans wrote:
> 
> >	EX_OSERR for fstat  (stat'ing should always be possible if the
> >	                     file exists)
> 
> stat() usually fails because the file doesn't exist.

The file for fstat() should always exist as long fd is a valid file
descriptor:

j@uriah 643% cat > foo.c
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <stdio.h> 
#include <fcntl.h>

int main(void)
{
        struct stat s;
        int fd;

        fd = open("foobar", O_CREAT, 0666);
        unlink("foobar");
        if(fstat(fd, &s) == -1) {
                perror("fstat()");
                return 1;
        } else {
                printf("fstat() result: mode 0%o, inode %d\n",
                        s.st_mode, s.st_ino);
        }
        return 0;
}
j@uriah 644% cc foo.c
j@uriah 645% ./a.out
fstat() result: mode 0100644, inode 324

-- 
cheers, J"org

joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)