usr/src/usr.bin/tip/remote.c

/*      remote.c        4.2     81/06/16        */
# include "tip.h"

/*
 * Attributes to be gleened from remote host description
 *   data base.
 */
static char **caps[] = {
        &AT, &DV, &CM, &CU, &EL, &IE, &OE, &PN
};

static char *capstrings[] = {
        "at", "dv", "cm", "cu", "el", "ie", "oe", "pn", 0
};

char *rgetstr();

static
getremcap(host)
        register char *host;
{
        int stat;
        char tbuf[BUFSIZ];
        static char buf[BUFSIZ/2];
        char *bp = buf;
        register char **p, ***q;

        if ((stat = rgetent(tbuf, host)) <= 0) {
                fprintf(stderr, stat == 0 ?
                        "tip: unknown host %s\n" :
                        "tip: can't open host description file\n", host);
                exit(3);
        }

        for (p = capstrings, q = caps; *p != NULL; p++, q++)
                **q = rgetstr(*p, &bp);
        if ((BR = rgetnum("br")) < 0)
                BR = DEFBR;
        if ((FS = rgetnum("fs")) < 0)
                FS = DEFFS;
        DU = rgetflag("du");
        HW = rgetflag("hw");
        if (DV == NOSTR) {
                fprintf(stderr, "%s: missing device spec\n", host);
                exit(3);
        }
        if (DU && CU == NOSTR)
                CU = DV;
        if (DU && PN == NOSTR) {
                fprintf(stderr, "%s: missing phone number\n", host);
                exit(3);
        }
        HO = host;
}

char *
getremote(host)
        char *host;
{
        register char *cp;
        static char *next;
        static int lookedup = 0;

        if (!lookedup) {
                if (host == NOSTR && (host = getenv("HOST")) == NOSTR) {
                        fprintf(stderr, "tip: no host specified\n");
                        exit(3);
                }
                getremcap(host);
                next = DV;
                lookedup++;
        }
        /*
         * We return a new device each time we're called (to allow
         *   a rotary action to be simulated)
         */
        if (next == NOSTR)
                return(NOSTR);
        if ((cp = index(next, ',')) == NULL) {
                DV = next;
                next = NOSTR;
        } else {
                *cp++ = '\0';
                DV = next;
                next = cp;
        }
        return(DV);
}