mirror of
https://git.FreeBSD.org/src.git
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197 lines
5.1 KiB
C
197 lines
5.1 KiB
C
/*-
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* Copyright (c) 1980, 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)cmds.c 8.2 (Berkeley) 4/29/95";
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#endif
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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#include <stdlib.h>
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#include <unistd.h>
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#include <signal.h>
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#include <ctype.h>
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#include <string.h>
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#include "systat.h"
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#include "extern.h"
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void
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command(cmd)
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char *cmd;
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{
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register struct cmdtab *p;
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register char *cp;
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int interval, omask;
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omask = sigblock(sigmask(SIGALRM));
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for (cp = cmd; *cp && !isspace(*cp); cp++)
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;
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if (*cp)
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*cp++ = '\0';
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if (*cmd == '\0')
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return;
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for (; *cp && isspace(*cp); cp++)
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;
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if (strcmp(cmd, "quit") == 0 || strcmp(cmd, "q") == 0)
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die(0);
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if (strcmp(cmd, "load") == 0) {
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load();
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goto done;
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}
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if (strcmp(cmd, "stop") == 0) {
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alarm(0);
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mvaddstr(CMDLINE, 0, "Refresh disabled.");
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clrtoeol();
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goto done;
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}
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if (strcmp(cmd, "help") == 0) {
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int col, len;
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move(CMDLINE, col = 0);
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for (p = cmdtab; p->c_name; p++) {
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len = strlen(p->c_name);
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if (col + len > COLS)
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break;
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addstr(p->c_name); col += len;
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if (col + 1 < COLS)
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addch(' ');
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}
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clrtoeol();
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goto done;
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}
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interval = atoi(cmd);
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if (interval <= 0 &&
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(strcmp(cmd, "start") == 0 || strcmp(cmd, "interval") == 0)) {
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interval = *cp ? atoi(cp) : naptime;
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if (interval <= 0) {
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error("%d: bad interval.", interval);
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goto done;
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}
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}
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if (interval > 0) {
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alarm(0);
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naptime = interval;
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display(0);
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status();
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goto done;
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}
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p = lookup(cmd);
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if (p == (struct cmdtab *)-1) {
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error("%s: Ambiguous command.", cmd);
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goto done;
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}
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if (p) {
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if (curcmd == p)
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goto done;
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alarm(0);
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(*curcmd->c_close)(wnd);
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wnd = (*p->c_open)();
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if (wnd == 0) {
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error("Couldn't open new display");
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wnd = (*curcmd->c_open)();
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if (wnd == 0) {
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error("Couldn't change back to previous cmd");
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exit(1);
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}
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p = curcmd;
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}
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if ((p->c_flags & CF_INIT) == 0) {
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if ((*p->c_init)())
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p->c_flags |= CF_INIT;
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else
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goto done;
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}
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curcmd = p;
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labels();
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display(0);
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status();
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goto done;
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}
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if (curcmd->c_cmd == 0 || !(*curcmd->c_cmd)(cmd, cp))
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error("%s: Unknown command.", cmd);
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done:
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sigsetmask(omask);
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}
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struct cmdtab *
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lookup(name)
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register char *name;
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{
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register char *p, *q;
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register struct cmdtab *c, *found;
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register int nmatches, longest;
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longest = 0;
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nmatches = 0;
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found = (struct cmdtab *) 0;
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for (c = cmdtab; p = c->c_name; c++) {
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for (q = name; *q == *p++; q++)
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if (*q == 0) /* exact match? */
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return (c);
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if (!*q) { /* the name was a prefix */
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if (q - name > longest) {
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longest = q - name;
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nmatches = 1;
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found = c;
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} else if (q - name == longest)
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nmatches++;
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}
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}
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if (nmatches > 1)
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return ((struct cmdtab *)-1);
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return (found);
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}
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void
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status()
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{
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error("Showing %s, refresh every %d seconds.",
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curcmd->c_name, naptime);
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}
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int
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prefix(s1, s2)
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register char *s1, *s2;
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{
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while (*s1 == *s2) {
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if (*s1 == '\0')
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return (1);
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s1++, s2++;
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}
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return (*s1 == '\0');
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}
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