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From: J Wunsch <j@uriah.heep.sax.de>
Message-Id: <199511041803.TAA02420@uriah.heep.sax.de>
Subject: Re: cvs commit: src/release/sysinstall command.c config.c disks.c label.c sysinstall.h
To: jkh@freefall.freebsd.org (Jordan K. Hubbard)
Date: Sat, 4 Nov 1995 19:03:50 +0100 (MET)
Cc: CVS-commiters@freefall.freebsd.org, cvs-user@freefall.freebsd.org
Reply-To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch)
In-Reply-To: <199511041545.HAA28940@freefall.freebsd.org> from "Jordan K. Hubbard" at Nov 4, 95 07:45:33 am
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As Jordan K. Hubbard wrote:
> 
>   Log:
>   Avoid doing disk selection twice in novice install.
>   Finally sort the fstab file entries correctly!  qsort() either
>   doesn't work or isn't working as documented.

qsort() usage is somewhat obfuscated:

j@uriah 222% cat foo.c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

const char *text[] = {
        "foo", "bar", "mumble", "murx", "junk", "rubbish",
        "trash", "bin", "junkpointer"
};

int
compar(const void *a, const void *b)
{
        return strcmp((const char *)*((const char **)a),
                      (const char *)*((const char **)b));
}

int main(void)
{
        const char **cp;
        int i;

        qsort(text, sizeof text / sizeof(const char *), sizeof(const char *),
              compar);

        for(cp = text, i = 0;
            i < sizeof text / sizeof(const char *);
            cp++, i++)
                printf("%s\n", *cp);

        return 0;
}
j@uriah 223% cc -Wall foo.c
j@uriah 224% ./a.out 
bar
bin
foo
junk
junkpointer
mumble
murx
rubbish
trash

-- 
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. ;-)