1 /* $NetBSD: cmds.c,v 1.8 1997/10/19 23:36:21 lukem 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 #if 0 39 static char sccsid[] = "@(#)cmds.c 8.2 (Berkeley) 4/29/95"; 40 #endif 41 __RCSID("$NetBSD: cmds.c,v 1.8 1997/10/19 23:36:21 lukem Exp $"); 42 #endif /* not lint */ 43 44 #include <stdlib.h> 45 #include <unistd.h> 46 #include <signal.h> 47 #include <ctype.h> 48 #include <string.h> 49 #include "systat.h" 50 #include "extern.h" 51 52 void 53 command(cmd) 54 char *cmd; 55 { 56 struct cmdtab *p; 57 char *cp; 58 int interval; 59 sigset_t set; 60 61 sigemptyset(&set); 62 sigaddset(&set, SIGALRM); 63 sigprocmask(SIG_BLOCK, &set, NULL); 64 for (cp = cmd; *cp && !isspace(*cp); cp++) 65 ; 66 if (*cp) 67 *cp++ = '\0'; 68 if (*cmd == '\0') 69 return; 70 for (; *cp && isspace(*cp); cp++) 71 ; 72 if (strcmp(cmd, "quit") == 0 || strcmp(cmd, "q") == 0) 73 die(0); 74 if (strcmp(cmd, "load") == 0) { 75 load(); 76 goto done; 77 } 78 if (strcmp(cmd, "stop") == 0) { 79 alarm(0); 80 mvaddstr(CMDLINE, 0, "Refresh disabled."); 81 clrtoeol(); 82 goto done; 83 } 84 if (strcmp(cmd, "help") == 0) { 85 int col, len; 86 87 move(CMDLINE, col = 0); 88 for (p = cmdtab; p->c_name; p++) { 89 len = strlen(p->c_name); 90 if (col + len > COLS) 91 break; 92 addstr(p->c_name); col += len; 93 if (col + 1 < COLS) 94 addch(' '); 95 } 96 clrtoeol(); 97 goto done; 98 } 99 interval = atoi(cmd); 100 if (interval <= 0 && 101 (strcmp(cmd, "start") == 0 || strcmp(cmd, "interval") == 0)) { 102 interval = *cp ? atoi(cp) : naptime; 103 if (interval <= 0) { 104 error("%d: bad interval.", interval); 105 goto done; 106 } 107 } 108 if (interval > 0) { 109 alarm(0); 110 naptime = interval; 111 display(0); 112 status(); 113 goto done; 114 } 115 p = lookup(cmd); 116 if (p == (struct cmdtab *)-1) { 117 error("%s: Ambiguous command.", cmd); 118 goto done; 119 } 120 if (p) { 121 if (curcmd == p) 122 goto done; 123 alarm(0); 124 (*curcmd->c_close)(wnd); 125 wnd = (*p->c_open)(); 126 if (wnd == 0) { 127 error("Couldn't open new display"); 128 wnd = (*curcmd->c_open)(); 129 if (wnd == 0) { 130 error("Couldn't change back to previous cmd"); 131 exit(1); 132 } 133 p = curcmd; 134 } 135 if ((p->c_flags & CF_INIT) == 0) { 136 if ((*p->c_init)()) 137 p->c_flags |= CF_INIT; 138 else 139 goto done; 140 } 141 curcmd = p; 142 labels(); 143 display(0); 144 status(); 145 goto done; 146 } 147 if (curcmd->c_cmd == 0 || !(*curcmd->c_cmd)(cmd, cp)) 148 error("%s: Unknown command.", cmd); 149 done: 150 sigprocmask(SIG_UNBLOCK, &set, NULL); 151 } 152 153 struct cmdtab * 154 lookup(name) 155 char *name; 156 { 157 char *p, *q; 158 struct cmdtab *c, *found; 159 int nmatches, longest; 160 161 longest = 0; 162 nmatches = 0; 163 found = (struct cmdtab *) 0; 164 for (c = cmdtab; (p = c->c_name); c++) { 165 for (q = name; *q == *p++; q++) 166 if (*q == 0) /* exact match? */ 167 return (c); 168 if (!*q) { /* the name was a prefix */ 169 if (q - name > longest) { 170 longest = q - name; 171 nmatches = 1; 172 found = c; 173 } else if (q - name == longest) 174 nmatches++; 175 } 176 } 177 if (nmatches > 1) 178 return ((struct cmdtab *)-1); 179 return (found); 180 } 181 182 void 183 status() 184 { 185 error("Showing %s, refresh every %d seconds.", curcmd->c_name, naptime); 186 } 187 188 int 189 prefix(s1, s2) 190 char *s1, *s2; 191 { 192 193 while (*s1 == *s2) { 194 if (*s1 == '\0') 195 return (1); 196 s1++, s2++; 197 } 198 return (*s1 == '\0'); 199 } 200