1 /* $NetBSD: cmds.c,v 1.6 1996/12/21 09:16:35 matthias 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 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)cmds.c 8.2 (Berkeley) 4/29/95"; 39 #endif 40 static char rcsid[] = "$NetBSD: cmds.c,v 1.6 1996/12/21 09:16:35 matthias Exp $"; 41 #endif /* not lint */ 42 43 #include <stdlib.h> 44 #include <unistd.h> 45 #include <signal.h> 46 #include <ctype.h> 47 #include <string.h> 48 #include "systat.h" 49 #include "extern.h" 50 51 void 52 command(cmd) 53 char *cmd; 54 { 55 register struct cmdtab *p; 56 register char *cp; 57 int interval; 58 sigset_t set; 59 60 sigemptyset(&set); 61 sigaddset(&set, SIGALRM); 62 sigprocmask(SIG_BLOCK, &set, NULL); 63 for (cp = cmd; *cp && !isspace(*cp); cp++) 64 ; 65 if (*cp) 66 *cp++ = '\0'; 67 if (*cmd == '\0') 68 return; 69 for (; *cp && isspace(*cp); cp++) 70 ; 71 if (strcmp(cmd, "quit") == 0 || strcmp(cmd, "q") == 0) 72 die(0); 73 if (strcmp(cmd, "load") == 0) { 74 load(); 75 goto done; 76 } 77 if (strcmp(cmd, "stop") == 0) { 78 alarm(0); 79 mvaddstr(CMDLINE, 0, "Refresh disabled."); 80 clrtoeol(); 81 goto done; 82 } 83 if (strcmp(cmd, "help") == 0) { 84 int col, len; 85 86 move(CMDLINE, col = 0); 87 for (p = cmdtab; p->c_name; p++) { 88 len = strlen(p->c_name); 89 if (col + len > COLS) 90 break; 91 addstr(p->c_name); col += len; 92 if (col + 1 < COLS) 93 addch(' '); 94 } 95 clrtoeol(); 96 goto done; 97 } 98 interval = atoi(cmd); 99 if (interval <= 0 && 100 (strcmp(cmd, "start") == 0 || strcmp(cmd, "interval") == 0)) { 101 interval = *cp ? atoi(cp) : naptime; 102 if (interval <= 0) { 103 error("%d: bad interval.", interval); 104 goto done; 105 } 106 } 107 if (interval > 0) { 108 alarm(0); 109 naptime = interval; 110 display(0); 111 status(); 112 goto done; 113 } 114 p = lookup(cmd); 115 if (p == (struct cmdtab *)-1) { 116 error("%s: Ambiguous command.", cmd); 117 goto done; 118 } 119 if (p) { 120 if (curcmd == p) 121 goto done; 122 alarm(0); 123 (*curcmd->c_close)(wnd); 124 wnd = (*p->c_open)(); 125 if (wnd == 0) { 126 error("Couldn't open new display"); 127 wnd = (*curcmd->c_open)(); 128 if (wnd == 0) { 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(0); 143 status(); 144 goto done; 145 } 146 if (curcmd->c_cmd == 0 || !(*curcmd->c_cmd)(cmd, cp)) 147 error("%s: Unknown command.", cmd); 148 done: 149 sigprocmask(SIG_UNBLOCK, &set, NULL); 150 } 151 152 struct cmdtab * 153 lookup(name) 154 register char *name; 155 { 156 register char *p, *q; 157 register struct cmdtab *c, *found; 158 register int nmatches, longest; 159 160 longest = 0; 161 nmatches = 0; 162 found = (struct cmdtab *) 0; 163 for (c = cmdtab; p = c->c_name; c++) { 164 for (q = name; *q == *p++; q++) 165 if (*q == 0) /* exact match? */ 166 return (c); 167 if (!*q) { /* the name was a prefix */ 168 if (q - name > longest) { 169 longest = q - name; 170 nmatches = 1; 171 found = c; 172 } else if (q - name == longest) 173 nmatches++; 174 } 175 } 176 if (nmatches > 1) 177 return ((struct cmdtab *)-1); 178 return (found); 179 } 180 181 void 182 status() 183 { 184 error("Showing %s, refresh every %d seconds.", curcmd->c_name, naptime); 185 } 186 187 int 188 prefix(s1, s2) 189 register char *s1, *s2; 190 { 191 192 while (*s1 == *s2) { 193 if (*s1 == '\0') 194 return (1); 195 s1++, s2++; 196 } 197 return (*s1 == '\0'); 198 } 199