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cmds.c revision 1.13 
      1 /*	$NetBSD: cmds.c,v 1.13 1999/12/16 06:16:16 jwise Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1980, 1992, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 #include <sys/cdefs.h>
     37 #ifndef lint
     38 #if 0
     39 static char sccsid[] = "@(#)cmds.c	8.2 (Berkeley) 4/29/95";
     40 #endif
     41 __RCSID("$NetBSD: cmds.c,v 1.13 1999/12/16 06:16:16 jwise Exp $");
     42 #endif /* not lint */
     43 
     44 #include <stdlib.h>
     45 #include <unistd.h>
     46 #include <signal.h>
     47 #include <ctype.h>
     48 #include <string.h>
     49 #include "systat.h"
     50 #include "extern.h"
     51 
     52 void	switch_mode __P((struct mode *p));
     53 
     54 void
     55 command(cmd)
     56 	char *cmd;
     57 {
     58 	struct command *c;
     59 	struct mode *p;
     60 	char *cp;
     61 	sigset_t set;
     62 
     63 	sigemptyset(&set);
     64 	sigaddset(&set, SIGALRM);
     65 	sigprocmask(SIG_BLOCK, &set, NULL);
     66 	for (cp = cmd; *cp && !isspace((unsigned char)*cp); cp++)
     67 		;
     68 	if (*cp)
     69 		*cp++ = '\0';
     70 	if (*cmd == '\0')
     71 		return;
     72 	for (; *cp && isspace((unsigned char)*cp); cp++)
     73 		;
     74 
     75 	for (c = global_commands; c->c_name; c++) {
     76 		if (strcmp(cmd, c->c_name) == 0) {
     77 			(c->c_cmd)(cp);
     78 			goto done;
     79 		}
     80 	}
     81 
     82 	if (isdigit(cmd[0])) {
     83 		global_interval(cmd);
     84 		goto done;
     85 	}
     86 
     87 	for (p = modes; p->c_name; p++) {
     88 		if (strcmp(cmd, p->c_name) == 0) {
     89 			switch_mode(p);
     90 			goto done;
     91 		}
     92 	}
     93 
     94 	if (curmode->c_cmd == 0 || !(*curmode->c_cmd)(cmd, cp))
     95 		error("%s: Unknown command.", cmd);
     96 done:
     97 	sigprocmask(SIG_UNBLOCK, &set, NULL);
     98 }
     99 
    100 void
    101 switch_mode(p)
    102 	struct mode *p;
    103 {
    104 	if (curmode == p)
    105 		return;
    106 
    107 	alarm(0);
    108 	(*curmode->c_close)(wnd);
    109 	wnd = (*p->c_open)();
    110 	if (wnd == 0) {
    111 		error("Couldn't open new display");
    112 		wnd = (*curmode->c_open)();
    113 		if (wnd == 0) {
    114 			error("Couldn't change back to previous mode");
    115 			exit(1);
    116 		}
    117 
    118 		p = curmode;
    119 	}
    120 
    121 	if ((p->c_flags & CF_INIT) == 0) {
    122 		if ((*p->c_init)())
    123 			p->c_flags |= CF_INIT;
    124 		else
    125 			return;
    126 	}
    127 
    128 	curmode = p;
    129 	labels();
    130 	display(0);
    131 	status();
    132 }
    133 
    134 void
    135 status()
    136 {
    137 	error("Showing %s, refresh every %d seconds.", curmode->c_name, naptime);
    138 }
    139 
    140 /* case insensitive prefix comparison */
    141 int
    142 prefix(s1, s2)
    143 	char *s1, *s2;
    144 {
    145 	char c1, c2;
    146 
    147 	while (1) {
    148 		c1 = *s1 >= 'A' && *s1 <= 'Z' ? *s1 + 'a' - 'A' : *s1;
    149 		c2 = *s2 >= 'A' && *s2 <= 'Z' ? *s2 + 'a' - 'A' : *s2;
    150 		if (c1 != c2)
    151 			break;
    152 		if (c1 == '\0')
    153 			return (1);
    154 		s1++, s2++;
    155 	}
    156 	return (*s1 == '\0');
    157 }
    158