1 /*        $NetBSD: cmds.c,v 1.30 2016/10/22 22:02:55 christos 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. Neither the name of the University nor the names of its contributors
16  *    may be used to endorse or promote products derived from this software
17  *    without specific prior written permission.
18  *
19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29  * SUCH DAMAGE.
30  */
31 
32 #include <sys/cdefs.h>
33 #ifndef lint
34 #if 0
35 static char sccsid[] = "@(#)cmds.c      8.2 (Berkeley) 4/29/95";
36 #endif
37 __RCSID("$NetBSD: cmds.c,v 1.30 2016/10/22 22:02:55 christos Exp $");
38 #endif /* not lint */
39 
40 #include <ctype.h>
41 #include <signal.h>
42 #include <string.h>
43 #include <unistd.h>
44 
45 #include "systat.h"
46 #include "extern.h"
47 
48 void      switch_mode(struct mode *p);
49 
50 void
command(char * cmd)51 command(char *cmd)
52 {
53           struct command *c;
54           struct mode *p;
55           char *args;
56 
57           if (cmd[0] == '\0')
58                     return;
59 
60           args = cmd;
61           cmd = strsep(&args, " \t");
62 
63           if (curmode->c_commands) {
64                     for (c = curmode->c_commands; c->c_name; c++) {
65                               if (strstr(c->c_name, cmd) == c->c_name) {
66                                         (c->c_cmd)(args);
67                                         goto done;
68                               }
69                     }
70           }
71 
72           for (c = global_commands; c->c_name; c++) {
73                     if (strstr(c->c_name, cmd) == c->c_name) {
74                               (c->c_cmd)(args);
75                               goto done;
76                     }
77           }
78 
79           for (p = modes; p->c_name; p++) {
80                     if (strstr(p->c_name, cmd) == p->c_name) {
81                               switch_mode(p);
82                               goto done;
83                     }
84           }
85 
86           if (isdigit((unsigned char)cmd[0])) {
87                     global_interval(cmd);
88                     goto done;
89           }
90 
91           error("%s: Unknown command.", cmd);
92 done:
93           ;
94 }
95 
96 void
switch_mode(struct mode * p)97 switch_mode(struct mode *p)
98 {
99           int switchfail;
100           struct mode *r;
101 
102           switchfail = 0;
103           r = p;
104 
105           if (curmode == p) {
106                     status();
107                     return;
108           }
109 
110           alarm(0);
111           (*curmode->c_close)(wnd);
112           wnd = (*p->c_open)();
113           if (wnd == 0) {
114                     wnd = (*curmode->c_open)();
115                     if (wnd == 0) {
116                               error("Couldn't change back to previous mode");
117                               die(0);
118                     }
119 
120                     p = curmode;
121                     switchfail++;
122           }
123 
124           if ((p->c_flags & CF_INIT) == 0) {
125                     if ((*p->c_init)())
126                               p->c_flags |= CF_INIT;
127                     else {
128                               (*p->c_close)(wnd);
129                               wnd = (*curmode->c_open)();
130                               p = curmode;
131                               switchfail++;
132                     }
133           }
134 
135           curmode = p;
136           labels();
137           display(0);
138           if (switchfail && !allflag)
139                     error("Couldn't switch mode, back to %s", curmode->c_name);
140           else {
141                     if (switchfail && allflag) {
142                               r++;
143                               switch_mode(r);
144                     } else {
145                               status();
146                     }
147           }
148 }
149 
150 void
status(void)151 status(void)
152 {
153           error("Showing %s, refresh every %g seconds.", curmode->c_name, naptime);
154 }
155 
156 int
prefix(const char * s1,const char * s2)157 prefix(const char *s1, const char *s2)
158 {
159 
160           while (*s1 == *s2) {
161                     if (*s1 == '\0')
162                               return (1);
163                     s1++, s2++;
164           }
165           return (*s1 == '\0');
166 }
167