/*      $NetBSD: cmds.c,v 1.30 2016/10/22 22:02:55 christos Exp $       */

/*-
 * Copyright (c) 1980, 1992, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)cmds.c      8.2 (Berkeley) 4/29/95";
#endif
__RCSID("$NetBSD: cmds.c,v 1.30 2016/10/22 22:02:55 christos Exp $");
#endif /* not lint */

#include <ctype.h>
#include <signal.h>
#include <string.h>
#include <unistd.h>

#include "systat.h"
#include "extern.h"

void    switch_mode(struct mode *p);

void
command(char *cmd)
{
        struct command *c;
        struct mode *p;
        char *args;

        if (cmd[0] == '\0')
                return;

        args = cmd;
        cmd = strsep(&args, " \t");

        if (curmode->c_commands) {
                for (c = curmode->c_commands; c->c_name; c++) {
                        if (strstr(c->c_name, cmd) == c->c_name) {
                                (c->c_cmd)(args);
                                goto done;
                        }
                }
        }

        for (c = global_commands; c->c_name; c++) {
                if (strstr(c->c_name, cmd) == c->c_name) {
                        (c->c_cmd)(args);
                        goto done;
                }
        }

        for (p = modes; p->c_name; p++) {
                if (strstr(p->c_name, cmd) == p->c_name) {
                        switch_mode(p);
                        goto done;
                }
        }

        if (isdigit((unsigned char)cmd[0])) {
                global_interval(cmd);
                goto done;
        }

        error("%s: Unknown command.", cmd);
done:
        ;
}

void
switch_mode(struct mode *p)
{
        int switchfail;
        struct mode *r;

        switchfail = 0;
        r = p;

        if (curmode == p) {
                status();
                return;
        }

        alarm(0);
        (*curmode->c_close)(wnd);
        wnd = (*p->c_open)();
        if (wnd == 0) {
                wnd = (*curmode->c_open)();
                if (wnd == 0) {
                        error("Couldn't change back to previous mode");
                        die(0);
                }

                p = curmode;
                switchfail++;
        }

        if ((p->c_flags & CF_INIT) == 0) {
                if ((*p->c_init)())
                        p->c_flags |= CF_INIT;
                else {
                        (*p->c_close)(wnd);
                        wnd = (*curmode->c_open)();
                        p = curmode;
                        switchfail++;
                }
        }

        curmode = p;
        labels();
        display(0);
        if (switchfail && !allflag)
                error("Couldn't switch mode, back to %s", curmode->c_name);
        else {
                if (switchfail && allflag) {
                        r++;
                        switch_mode(r);
                } else {
                        status();
                }
        }
}

void
status(void)
{
        error("Showing %s, refresh every %g seconds.", curmode->c_name, naptime);
}

int
prefix(const char *s1, const char *s2)
{

        while (*s1 == *s2) {
                if (*s1 == '\0')
                        return (1);
                s1++, s2++;
        }
        return (*s1 == '\0');
}