Re: rc.d and non daemon servers

["Steven M. Bellovin" <smb%cs.columbia.edu@localhost>]

On Wed, 4 Mar 2009 16:57:35 -0500
"Steven M. Bellovin" <smb%cs.columbia.edu@localhost> wrote:

> On Wed, 4 Mar 2009 15:15:00 -0500
> Amitai Schlair <schmonz%schmonz.com@localhost> wrote:
> 
> > http://libslack.org/daemon/
> 
> Interesting, but it's rather, umm, large...  Thanks.  I may still
> write my own.
> 
OK, here it is.  It's dumb and stupid, and does nothing but invoke our
daemon() subroutine.  If folks care, I'll write a man page and stick it
into pkgsrc.  Usage should be obvious from the code and daemon(3).


                --Steve Bellovin, http://www.cs.columbia.edu/~smb

#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>

main(int argc, char *argv[])
{
        int nochdir, noclose;
        char **p;
        extern void usage(void);

        nochdir = 0; noclose = 0;

        for (p = argv+1; *p && **p == '-'; p++) {
                if (strcmp(*p, "-c") == 0)
                        nochdir = 1;
                else if (strcmp(*p, "-f") == 0)
                        noclose = 1;
                else if (strcmp(*p, "-h") == 0) {
                        usage();
                        return(0);
                }
                else {
                        usage();
                        return 1;
                }
        }
        if (*p == NULL) {
                usage();
                return 2;
        }
        if (daemon(nochdir, noclose) != 0) {
                perror("daemon");
                return 3;
        }
        execvp(*p, p);
        perror("exec");
        return 4;
}

void
usage()
{
        fprintf(stderr, "Usage: daemond: [-c] [-f] command [args]\n");
}