1 /*-
2 * Copyright (c) 1980, 1992, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * %sccs.include.redist.c%
6 */
7
8 #ifndef lint
9 static char sccsid[] = "@(#)cmds.c 8.2 (Berkeley) 04/29/95";
10 #endif /* not lint */
11
12 #include <stdlib.h>
13 #include <unistd.h>
14 #include <signal.h>
15 #include <ctype.h>
16 #include <string.h>
17 #include "systat.h"
18 #include "extern.h"
19
20 void
command(cmd)21 command(cmd)
22 char *cmd;
23 {
24 register struct cmdtab *p;
25 register char *cp;
26 int interval, omask;
27
28 omask = sigblock(sigmask(SIGALRM));
29 for (cp = cmd; *cp && !isspace(*cp); cp++)
30 ;
31 if (*cp)
32 *cp++ = '\0';
33 if (*cmd == '\0')
34 return;
35 for (; *cp && isspace(*cp); cp++)
36 ;
37 if (strcmp(cmd, "quit") == 0 || strcmp(cmd, "q") == 0)
38 die(0);
39 if (strcmp(cmd, "load") == 0) {
40 load();
41 goto done;
42 }
43 if (strcmp(cmd, "stop") == 0) {
44 alarm(0);
45 mvaddstr(CMDLINE, 0, "Refresh disabled.");
46 clrtoeol();
47 goto done;
48 }
49 if (strcmp(cmd, "help") == 0) {
50 int col, len;
51
52 move(CMDLINE, col = 0);
53 for (p = cmdtab; p->c_name; p++) {
54 len = strlen(p->c_name);
55 if (col + len > COLS)
56 break;
57 addstr(p->c_name); col += len;
58 if (col + 1 < COLS)
59 addch(' ');
60 }
61 clrtoeol();
62 goto done;
63 }
64 interval = atoi(cmd);
65 if (interval <= 0 &&
66 (strcmp(cmd, "start") == 0 || strcmp(cmd, "interval") == 0)) {
67 interval = *cp ? atoi(cp) : naptime;
68 if (interval <= 0) {
69 error("%d: bad interval.", interval);
70 goto done;
71 }
72 }
73 if (interval > 0) {
74 alarm(0);
75 naptime = interval;
76 display(0);
77 status();
78 goto done;
79 }
80 p = lookup(cmd);
81 if (p == (struct cmdtab *)-1) {
82 error("%s: Ambiguous command.", cmd);
83 goto done;
84 }
85 if (p) {
86 if (curcmd == p)
87 goto done;
88 alarm(0);
89 (*curcmd->c_close)(wnd);
90 wnd = (*p->c_open)();
91 if (wnd == 0) {
92 error("Couldn't open new display");
93 wnd = (*curcmd->c_open)();
94 if (wnd == 0) {
95 error("Couldn't change back to previous cmd");
96 exit(1);
97 }
98 p = curcmd;
99 }
100 if ((p->c_flags & CF_INIT) == 0) {
101 if ((*p->c_init)())
102 p->c_flags |= CF_INIT;
103 else
104 goto done;
105 }
106 curcmd = p;
107 labels();
108 display(0);
109 status();
110 goto done;
111 }
112 if (curcmd->c_cmd == 0 || !(*curcmd->c_cmd)(cmd, cp))
113 error("%s: Unknown command.", cmd);
114 done:
115 sigsetmask(omask);
116 }
117
118 struct cmdtab *
lookup(name)119 lookup(name)
120 register char *name;
121 {
122 register char *p, *q;
123 register struct cmdtab *c, *found;
124 register int nmatches, longest;
125
126 longest = 0;
127 nmatches = 0;
128 found = (struct cmdtab *) 0;
129 for (c = cmdtab; p = c->c_name; c++) {
130 for (q = name; *q == *p++; q++)
131 if (*q == 0) /* exact match? */
132 return (c);
133 if (!*q) { /* the name was a prefix */
134 if (q - name > longest) {
135 longest = q - name;
136 nmatches = 1;
137 found = c;
138 } else if (q - name == longest)
139 nmatches++;
140 }
141 }
142 if (nmatches != 1)
143 return ((struct cmdtab *)-1);
144 return (found);
145 }
146
147 void
status()148 status()
149 {
150
151 error("Showing %s, refresh every %d seconds.",
152 curcmd->c_name, naptime);
153 }
154
155 int
prefix(s1,s2)156 prefix(s1, s2)
157 register char *s1, *s2;
158 {
159
160 while (*s1 == *s2) {
161 if (*s1 == '\0')
162 return (1);
163 s1++, s2++;
164 }
165 return (*s1 == '\0');
166 }
167