1 /* $NetBSD: cmds.c,v 1.2 1995/01/20 08:51:50 jtc 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 8.1 (Berkeley) 6/6/93"; 39 #endif 40 static char rcsid[] = "$NetBSD: cmds.c,v 1.2 1995/01/20 08:51:50 jtc 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, omask; 58 59 omask = sigblock(sigmask(SIGALRM)); 60 for (cp = cmd; *cp && !isspace(*cp); cp++) 61 ; 62 if (*cp) 63 *cp++ = '\0'; 64 if (*cmd == '\0') 65 return; 66 for (; *cp && isspace(*cp); cp++) 67 ; 68 if (strcmp(cmd, "quit") == 0 || strcmp(cmd, "q") == 0) 69 die(0); 70 if (strcmp(cmd, "load") == 0) { 71 load(); 72 goto done; 73 } 74 if (strcmp(cmd, "stop") == 0) { 75 alarm(0); 76 mvaddstr(CMDLINE, 0, "Refresh disabled."); 77 clrtoeol(); 78 goto done; 79 } 80 if (strcmp(cmd, "help") == 0) { 81 int col, len; 82 83 move(CMDLINE, col = 0); 84 for (p = cmdtab; p->c_name; p++) { 85 len = strlen(p->c_name); 86 if (col + len > COLS) 87 break; 88 addstr(p->c_name); col += len; 89 if (col + 1 < COLS) 90 addch(' '); 91 } 92 clrtoeol(); 93 goto done; 94 } 95 interval = atoi(cmd); 96 if (interval <= 0 && 97 (strcmp(cmd, "start") == 0 || strcmp(cmd, "interval") == 0)) { 98 interval = *cp ? atoi(cp) : naptime; 99 if (interval <= 0) { 100 error("%d: bad interval.", interval); 101 goto done; 102 } 103 } 104 if (interval > 0) { 105 alarm(0); 106 naptime = interval; 107 display(0); 108 status(); 109 goto done; 110 } 111 p = lookup(cmd); 112 if (p == (struct cmdtab *)-1) { 113 error("%s: Ambiguous command.", cmd); 114 goto done; 115 } 116 if (p) { 117 if (curcmd == p) 118 goto done; 119 alarm(0); 120 (*curcmd->c_close)(wnd); 121 wnd = (*p->c_open)(); 122 if (wnd == 0) { 123 error("Couldn't open new display"); 124 wnd = (*curcmd->c_open)(); 125 if (wnd == 0) { 126 error("Couldn't change back to previous cmd"); 127 exit(1); 128 } 129 p = curcmd; 130 } 131 if ((p->c_flags & CF_INIT) == 0) { 132 if ((*p->c_init)()) 133 p->c_flags |= CF_INIT; 134 else 135 goto done; 136 } 137 curcmd = p; 138 labels(); 139 display(0); 140 status(); 141 goto done; 142 } 143 if (curcmd->c_cmd == 0 || !(*curcmd->c_cmd)(cmd, cp)) 144 error("%s: Unknown command.", cmd); 145 done: 146 sigsetmask(omask); 147 } 148 149 struct cmdtab * 150 lookup(name) 151 register char *name; 152 { 153 register char *p, *q; 154 register struct cmdtab *c, *found; 155 register int nmatches, longest; 156 157 longest = 0; 158 nmatches = 0; 159 found = (struct cmdtab *) 0; 160 for (c = cmdtab; p = c->c_name; c++) { 161 for (q = name; *q == *p++; q++) 162 if (*q == 0) /* exact match? */ 163 return (c); 164 if (!*q) { /* the name was a prefix */ 165 if (q - name > longest) { 166 longest = q - name; 167 nmatches = 1; 168 found = c; 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 179 status() 180 { 181 182 error("Showing %s, refresh every %d seconds.", 183 curcmd->c_name, naptime); 184 } 185 186 int 187 prefix(s1, s2) 188 register char *s1, *s2; 189 { 190 191 while (*s1 == *s2) { 192 if (*s1 == '\0') 193 return (1); 194 s1++, s2++; 195 } 196 return (*s1 == '\0'); 197 } 198