/*      $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');
}