1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
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
34 __FBSDID("$FreeBSD$");
35
36 #ifdef lint
37 static const char sccsid[] = "@(#)cmds.c 8.2 (Berkeley) 4/29/95";
38 #endif
39
40 #include <sys/param.h>
41
42 #include <ctype.h>
43 #include <signal.h>
44 #include <stdlib.h>
45 #include <string.h>
46 #include <unistd.h>
47
48 #include "systat.h"
49 #include "extern.h"
50
51 void
command(const char * cmd)52 command(const char *cmd)
53 {
54 struct cmdtab *p;
55 char *cp, *tmpstr, *tmpstr1;
56 double t;
57
58 tmpstr = tmpstr1 = strdup(cmd);
59 for (cp = tmpstr1; *cp && !isspace(*cp); cp++)
60 ;
61 if (*cp)
62 *cp++ = '\0';
63 if (*tmpstr1 == '\0')
64 goto done;
65 for (; *cp && isspace(*cp); cp++)
66 ;
67 if (strcmp(tmpstr1, "quit") == 0 || strcmp(tmpstr1, "q") == 0)
68 die(0);
69 if (strcmp(tmpstr1, "load") == 0) {
70 load();
71 goto done;
72 }
73 if (strcmp(tmpstr1, "stop") == 0) {
74 delay = 0;
75 mvaddstr(CMDLINE, 0, "Refresh disabled.");
76 clrtoeol();
77 goto done;
78 }
79 if (strcmp(tmpstr1, "help") == 0) {
80 int _col, _len;
81
82 move(CMDLINE, _col = 0);
83 for (p = cmdtab; p->c_name; p++) {
84 _len = strlen(p->c_name);
85 if (_col + _len > COLS)
86 break;
87 addstr(p->c_name); _col += _len;
88 if (_col + 1 < COLS)
89 addch(' ');
90 }
91 clrtoeol();
92 goto done;
93 }
94 t = strtod(tmpstr1, NULL) * 1000000.0;
95 if (t > 0 && t < (double)UINT_MAX)
96 delay = (unsigned int)t;
97 if ((t <= 0 || t > (double)UINT_MAX) &&
98 (strcmp(tmpstr1, "start") == 0 ||
99 strcmp(tmpstr1, "interval") == 0)) {
100 if (*cp != '\0') {
101 t = strtod(cp, NULL) * 1000000.0;
102 if (t <= 0 || t >= (double)UINT_MAX) {
103 error("%d: bad interval.", (int)t);
104 goto done;
105 }
106 }
107 }
108 if (t > 0) {
109 delay = (unsigned int)t;
110 display();
111 status();
112 goto done;
113 }
114 p = lookup(tmpstr1);
115 if (p == (struct cmdtab *)-1) {
116 error("%s: Ambiguous command.", tmpstr1);
117 goto done;
118 }
119 if (p) {
120 if (curcmd == p)
121 goto done;
122 (*curcmd->c_close)(wnd);
123 curcmd->c_flags &= ~CF_INIT;
124 wnd = (*p->c_open)();
125 if (wnd == NULL) {
126 error("Couldn't open new display");
127 wnd = (*curcmd->c_open)();
128 if (wnd == NULL) {
129 error("Couldn't change back to previous cmd");
130 exit(1);
131 }
132 p = curcmd;
133 }
134 if ((p->c_flags & CF_INIT) == 0) {
135 if ((*p->c_init)())
136 p->c_flags |= CF_INIT;
137 else
138 goto done;
139 }
140 curcmd = p;
141 labels();
142 display();
143 status();
144 goto done;
145 }
146 if (curcmd->c_cmd == NULL || !(*curcmd->c_cmd)(tmpstr1, cp))
147 error("%s: Unknown command.", tmpstr1);
148 done:
149 free(tmpstr);
150 }
151
152 struct cmdtab *
lookup(const char * name)153 lookup(const char *name)
154 {
155 const char *p, *q;
156 struct cmdtab *ct, *found;
157 int nmatches, longest;
158
159 longest = 0;
160 nmatches = 0;
161 found = (struct cmdtab *) 0;
162 for (ct = cmdtab; (p = ct->c_name); ct++) {
163 for (q = name; *q == *p++; q++)
164 if (*q == 0) /* exact match? */
165 return (ct);
166 if (!*q) { /* the name was a prefix */
167 if (q - name > longest) {
168 longest = q - name;
169 nmatches = 1;
170 found = ct;
171 } else if (q - name == longest)
172 nmatches++;
173 }
174 }
175 if (nmatches > 1)
176 return ((struct cmdtab *)-1);
177 return (found);
178 }
179
180 void
status(void)181 status(void)
182 {
183
184 error("Showing %s, refresh every %d seconds.",
185 curcmd->c_name, delay / 1000000);
186 }
187
188 int
prefix(const char * s1,const char * s2)189 prefix(const char *s1, const char *s2)
190 {
191
192 while (*s1 == *s2) {
193 if (*s1 == '\0')
194 return (1);
195 s1++, s2++;
196 }
197 return (*s1 == '\0');
198 }
199