1 /*-
2 * Copyright (c) 1980, 1992, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #include <sys/cdefs.h>
31
32 __FBSDID("$FreeBSD$");
33
34 #ifdef lint
35 static const char sccsid[] = "@(#)cmds.c 8.2 (Berkeley) 4/29/95";
36 #endif
37
38 #include <sys/param.h>
39
40 #include <ctype.h>
41 #include <signal.h>
42 #include <stdlib.h>
43 #include <string.h>
44 #include <unistd.h>
45
46 #include "systat.h"
47 #include "extern.h"
48
49 void
command(const char * cmd)50 command(const char *cmd)
51 {
52 struct cmdtab *p;
53 char *cp, *tmpstr, *tmpstr1;
54 double t;
55
56 tmpstr = tmpstr1 = strdup(cmd);
57 for (cp = tmpstr1; *cp && !isspace(*cp); cp++)
58 ;
59 if (*cp)
60 *cp++ = '\0';
61 if (*tmpstr1 == '\0')
62 return;
63 for (; *cp && isspace(*cp); cp++)
64 ;
65 if (strcmp(tmpstr1, "quit") == 0 || strcmp(tmpstr1, "q") == 0)
66 die(0);
67 if (strcmp(tmpstr1, "load") == 0) {
68 load();
69 goto done;
70 }
71 if (strcmp(tmpstr1, "stop") == 0) {
72 delay = 0;
73 mvaddstr(CMDLINE, 0, "Refresh disabled.");
74 clrtoeol();
75 goto done;
76 }
77 if (strcmp(tmpstr1, "help") == 0) {
78 int _col, _len;
79
80 move(CMDLINE, _col = 0);
81 for (p = cmdtab; p->c_name; p++) {
82 _len = strlen(p->c_name);
83 if (_col + _len > COLS)
84 break;
85 addstr(p->c_name); _col += _len;
86 if (_col + 1 < COLS)
87 addch(' ');
88 }
89 clrtoeol();
90 goto done;
91 }
92 t = strtod(tmpstr1, NULL) * 1000000.0;
93 if (t > 0 && t < (double)UINT_MAX)
94 delay = (unsigned int)t;
95 if ((t <= 0 || t > (double)UINT_MAX) &&
96 (strcmp(tmpstr1, "start") == 0 ||
97 strcmp(tmpstr1, "interval") == 0)) {
98 if (*cp != '\0') {
99 t = strtod(cp, NULL) * 1000000.0;
100 if (t <= 0 || t >= (double)UINT_MAX) {
101 error("%d: bad interval.", (int)t);
102 goto done;
103 }
104 }
105 }
106 if (t > 0) {
107 delay = (unsigned int)t;
108 display();
109 status();
110 goto done;
111 }
112 p = lookup(tmpstr1);
113 if (p == (struct cmdtab *)-1) {
114 error("%s: Ambiguous command.", tmpstr1);
115 goto done;
116 }
117 if (p) {
118 if (curcmd == p)
119 goto done;
120 (*curcmd->c_close)(wnd);
121 curcmd->c_flags &= ~CF_INIT;
122 wnd = (*p->c_open)();
123 if (wnd == 0) {
124 error("Couldn't open new display");
125 wnd = (*curcmd->c_open)();
126 if (wnd == 0) {
127 error("Couldn't change back to previous cmd");
128 exit(1);
129 }
130 p = curcmd;
131 }
132 if ((p->c_flags & CF_INIT) == 0) {
133 if ((*p->c_init)())
134 p->c_flags |= CF_INIT;
135 else
136 goto done;
137 }
138 curcmd = p;
139 labels();
140 display();
141 status();
142 goto done;
143 }
144 if (curcmd->c_cmd == 0 || !(*curcmd->c_cmd)(tmpstr1, cp))
145 error("%s: Unknown command.", tmpstr1);
146 done:
147 free(tmpstr);
148 }
149
150 struct cmdtab *
lookup(const char * name)151 lookup(const char *name)
152 {
153 const char *p, *q;
154 struct cmdtab *ct, *found;
155 int nmatches, longest;
156
157 longest = 0;
158 nmatches = 0;
159 found = (struct cmdtab *) 0;
160 for (ct = cmdtab; (p = ct->c_name); ct++) {
161 for (q = name; *q == *p++; q++)
162 if (*q == 0) /* exact match? */
163 return (ct);
164 if (!*q) { /* the name was a prefix */
165 if (q - name > longest) {
166 longest = q - name;
167 nmatches = 1;
168 found = ct;
169 } else if (q - name == longest)
170 nmatches++;
171 }
172 }
173 if (nmatches > 1)
174 return ((struct cmdtab *)-1);
175 return (found);
176 }
177
178 void
status(void)179 status(void)
180 {
181
182 error("Showing %s, refresh every %d seconds.",
183 curcmd->c_name, delay / 1000000);
184 }
185
186 int
prefix(const char * s1,const char * s2)187 prefix(const char *s1, const char *s2)
188 {
189
190 while (*s1 == *s2) {
191 if (*s1 == '\0')
192 return (1);
193 s1++, s2++;
194 }
195 return (*s1 == '\0');
196 }
197