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 * 3. 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 * @(#)cmds.c 8.2 (Berkeley) 4/29/95
30 * $FreeBSD: src/usr.bin/systat/cmds.c,v 1.3 1999/08/28 01:05:58 peter Exp $
31 * $DragonFly: src/usr.bin/systat/cmds.c,v 1.6 2008/11/10 04:59:45 swildner Exp $
32 */
33
34 #include <stdlib.h>
35 #include <unistd.h>
36 #include <signal.h>
37 #include <ctype.h>
38 #include <string.h>
39 #include "systat.h"
40 #include "extern.h"
41
42 void
command(const char * cmd)43 command(const char *cmd)
44 {
45 struct cmdtab *p;
46 char *cp;
47 int omask;
48 double interval;
49
50 omask = sigblock(sigmask(SIGALRM));
51 for (cp = __DECONST(char *, cmd); *cp && !isspace(*cp); cp++)
52 ;
53 if (*cp)
54 *cp++ = '\0';
55 if (*cmd == '\0')
56 return;
57 for (; *cp && isspace(*cp); cp++)
58 ;
59 if (strcmp(cmd, "quit") == 0 || strcmp(cmd, "q") == 0)
60 die(0);
61 if (strcmp(cmd, "load") == 0) {
62 load();
63 goto done;
64 }
65 if (strcmp(cmd, "stop") == 0) {
66 alarm(0);
67 mvaddstr(CMDLINE, 0, "Refresh disabled.");
68 clrtoeol();
69 goto done;
70 }
71 if (strcmp(cmd, "help") == 0) {
72 int _col, _len;
73
74 move(CMDLINE, _col = 0);
75 for (p = cmdtab; p->c_name; p++) {
76 _len = strlen(p->c_name);
77 if (_col + _len > COLS)
78 break;
79 addstr(p->c_name); _col += _len;
80 if (_col + 1 < COLS)
81 addch(' ');
82 }
83 clrtoeol();
84 goto done;
85 }
86 interval = strtod(cmd, NULL);
87 if (interval <= 0.0 &&
88 (strcmp(cmd, "start") == 0 || strcmp(cmd, "interval") == 0)) {
89 interval = *cp ? strtod(cp, NULL) : naptime;
90 if (interval <= 0.0) {
91 error("%3.2f: bad interval.", interval);
92 goto done;
93 }
94 }
95 if (interval > 0.0) {
96 alarm(0);
97 naptime = interval;
98 display(0);
99 status();
100 goto done;
101 }
102 p = lookup(cmd);
103 if (p == (struct cmdtab *)-1) {
104 error("%s: Ambiguous command.", cmd);
105 goto done;
106 }
107 if (p) {
108 if (curcmd == p)
109 goto done;
110 alarm(0);
111 (*curcmd->c_close)(wnd);
112 wnd = (*p->c_open)();
113 if (wnd == 0) {
114 error("Couldn't open new display");
115 wnd = (*curcmd->c_open)();
116 if (wnd == 0) {
117 error("Couldn't change back to previous cmd");
118 exit(1);
119 }
120 p = curcmd;
121 }
122 if ((p->c_flags & CF_INIT) == 0) {
123 if ((*p->c_init)())
124 p->c_flags |= CF_INIT;
125 else
126 goto done;
127 }
128 curcmd = p;
129 labels();
130 display(0);
131 status();
132 goto done;
133 }
134 if (curcmd->c_cmd == 0 || !(*curcmd->c_cmd)(cmd, cp))
135 error("%s: Unknown command.", cmd);
136 done:
137 sigsetmask(omask);
138 }
139
140 struct cmdtab *
lookup(const char * name)141 lookup(const char *name)
142 {
143 const char *p, *q;
144 struct cmdtab *ct, *found;
145 int nmatches, longest;
146
147 longest = 0;
148 nmatches = 0;
149 found = NULL;
150 for (ct = cmdtab; (p = ct->c_name); ct++) {
151 for (q = name; *q == *p++; q++)
152 if (*q == 0) /* exact match? */
153 return (ct);
154 if (!*q) { /* the name was a prefix */
155 if (q - name > longest) {
156 longest = q - name;
157 nmatches = 1;
158 found = ct;
159 } else if (q - name == longest)
160 nmatches++;
161 }
162 }
163 if (nmatches > 1)
164 return ((struct cmdtab *)-1);
165 return (found);
166 }
167
168 void
status(void)169 status(void)
170 {
171
172 error("Showing %s, refresh every %3.2f seconds.",
173 curcmd->c_name, naptime);
174 }
175
176 int
prefix(const char * s1,const char * s2)177 prefix(const char *s1, const char *s2)
178 {
179
180 while (*s1 == *s2) {
181 if (*s1 == '\0')
182 return (1);
183 s1++, s2++;
184 }
185 return (*s1 == '\0');
186 }
187