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cmds.c revision 1.14 
      1 /*	$NetBSD: cmds.c,v 1.14 1999/12/20 03:45:01 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 1.14 1999/12/20 03:45:01 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 	if (curmode->c_commands) {
     76 		for (c = curmode->c_commands; c->c_name; c++) {
     77 			if (strcmp(cmd, c->c_name) == 0) {
     78 				(c->c_cmd)(cp);
     79 				goto done;
     80 			}
     81 		}
     82 	}
     83 
     84 	for (c = global_commands; c->c_name; c++) {
     85 		if (strcmp(cmd, c->c_name) == 0) {
     86 			(c->c_cmd)(cp);
     87 			goto done;
     88 		}
     89 	}
     90 
     91 	if (isdigit(cmd[0])) {
     92 		global_interval(cmd);
     93 		goto done;
     94 	}
     95 
     96 	for (p = modes; p->c_name; p++) {
     97 		if (strcmp(cmd, p->c_name) == 0) {
     98 			switch_mode(p);
     99 			goto done;
    100 		}
    101 	}
    102 
    103 	error("%s: Unknown command.", cmd);
    104 done:
    105 	sigprocmask(SIG_UNBLOCK, &set, NULL);
    106 }
    107 
    108 void
    109 switch_mode(p)
    110 	struct mode *p;
    111 {
    112 	if (curmode == p)
    113 		return;
    114 
    115 	alarm(0);
    116 	(*curmode->c_close)(wnd);
    117 	wnd = (*p->c_open)();
    118 	if (wnd == 0) {
    119 		error("Couldn't open new display");
    120 		wnd = (*curmode->c_open)();
    121 		if (wnd == 0) {
    122 			error("Couldn't change back to previous mode");
    123 			exit(1);
    124 		}
    125 
    126 		p = curmode;
    127 	}
    128 
    129 	if ((p->c_flags & CF_INIT) == 0) {
    130 		if ((*p->c_init)())
    131 			p->c_flags |= CF_INIT;
    132 		else
    133 			return;
    134 	}
    135 
    136 	curmode = p;
    137 	labels();
    138 	display(0);
    139 	status();
    140 }
    141 
    142 void
    143 status()
    144 {
    145 	error("Showing %s, refresh every %d seconds.", curmode->c_name, naptime);
    146 }
    147 
    148 /* case insensitive prefix comparison */
    149 int
    150 prefix(s1, s2)
    151 	char *s1, *s2;
    152 {
    153 	char c1, c2;
    154 
    155 	while (1) {
    156 		c1 = *s1 >= 'A' && *s1 <= 'Z' ? *s1 + 'a' - 'A' : *s1;
    157 		c2 = *s2 >= 'A' && *s2 <= 'Z' ? *s2 + 'a' - 'A' : *s2;
    158 		if (c1 != c2)
    159 			break;
    160 		if (c1 == '\0')
    161 			return (1);
    162 		s1++, s2++;
    163 	}
    164 	return (*s1 == '\0');
    165 }
    166