NetBSD/usr.bin/systat/cmds.c

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/* $NetBSD: cmds.c,v 1.25 2000/12/01 02:19:43 simonb Exp $ */
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/*-
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*/
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#include <sys/cdefs.h>
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#ifndef lint
#if 0
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static char sccsid[] = "@(#)cmds.c 8.2 (Berkeley) 4/29/95";
#endif
__RCSID("$NetBSD: cmds.c,v 1.25 2000/12/01 02:19:43 simonb Exp $");
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#endif /* not lint */
#include <ctype.h>
#include <signal.h>
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#include <string.h>
#include <unistd.h>
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#include "systat.h"
#include "extern.h"
void switch_mode(struct mode *p);
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void
command(char *cmd)
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{
struct command *c;
struct mode *p;
char *args;
sigset_t set;
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if (cmd[0] == '\0')
return;
sigemptyset(&set);
sigaddset(&set, SIGALRM);
sigprocmask(SIG_BLOCK, &set, NULL);
args = cmd;
cmd = strsep(&args, " \t");
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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;
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}
}
for (p = modes; p->c_name; p++) {
if (strstr(p->c_name, cmd) == p->c_name) {
switch_mode(p);
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goto done;
}
}
if (isdigit(cmd[0])) {
global_interval(cmd);
goto done;
}
error("%s: Unknown command.", cmd);
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done:
sigprocmask(SIG_UNBLOCK, &set, NULL);
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}
void
switch_mode(struct mode *p)
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{
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);
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}
p = curmode;
switchfail++;
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}
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();
}
}
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}
void
status(void)
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{
error("Showing %s, refresh every %d seconds.", curmode->c_name, naptime);
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}