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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 #if 0 36 static char sccsid[] = "@(#)cmds.c 8.2 (Berkeley) 4/29/95"; 37 #endif 38 static const char rcsid[] = 39 "$FreeBSD$"; 40 #endif /* not lint */ 41 42 #include <stdlib.h> 43 #include <unistd.h> 44 #include <signal.h> 45 #include <ctype.h> 46 #include <string.h> 47 #include "systat.h" 48 #include "extern.h" 49 50 void 51 command(cmd) 52 char *cmd; 53 { 54 register struct cmdtab *p; 55 register char *cp; 56 int interval, omask; 57 58 omask = sigblock(sigmask(SIGALRM)); 59 for (cp = cmd; *cp && !isspace(*cp); cp++) 60 ; 61 if (*cp) 62 *cp++ = '\0'; 63 if (*cmd == '\0') 64 return; 65 for (; *cp && isspace(*cp); cp++) 66 ; 67 if (strcmp(cmd, "quit") == 0 || strcmp(cmd, "q") == 0) 68 die(0); 69 if (strcmp(cmd, "load") == 0) { 70 load(); 71 goto done; 72 } 73 if (strcmp(cmd, "stop") == 0) { 74 alarm(0); 75 mvaddstr(CMDLINE, 0, "Refresh disabled."); 76 clrtoeol(); 77 goto done; 78 } 79 if (strcmp(cmd, "help") == 0) { 80 int col, len; 81 82 move(CMDLINE, col = 0); 83 for (p = cmdtab; p->c_name; p++) { 84 len = strlen(p->c_name); 85 if (col + len > COLS) 86 break; 87 addstr(p->c_name); col += len; 88 if (col + 1 < COLS) 89 addch(' '); 90 } 91 clrtoeol(); 92 goto done; 93 } 94 interval = atoi(cmd); 95 if (interval <= 0 && 96 (strcmp(cmd, "start") == 0 || strcmp(cmd, "interval") == 0)) { 97 interval = *cp ? atoi(cp) : naptime; 98 if (interval <= 0) { 99 error("%d: bad interval.", interval); 100 goto done; 101 } 102 } 103 if (interval > 0) { 104 alarm(0); 105 naptime = interval; 106 display(0); 107 status(); 108 goto done; 109 } 110 p = lookup(cmd); 111 if (p == (struct cmdtab *)-1) { 112 error("%s: Ambiguous command.", cmd); 113 goto done; 114 } 115 if (p) { 116 if (curcmd == p) 117 goto done; 118 alarm(0); 119 (*curcmd->c_close)(wnd); 120 wnd = (*p->c_open)(); 121 if (wnd == 0) { 122 error("Couldn't open new display"); 123 wnd = (*curcmd->c_open)(); 124 if (wnd == 0) { 125 error("Couldn't change back to previous cmd"); 126 exit(1); 127 } 128 p = curcmd; 129 } 130 if ((p->c_flags & CF_INIT) == 0) { 131 if ((*p->c_init)()) 132 p->c_flags |= CF_INIT; 133 else 134 goto done; 135 } 136 curcmd = p; 137 labels(); 138 display(0); 139 status(); 140 goto done; 141 } 142 if (curcmd->c_cmd == 0 || !(*curcmd->c_cmd)(cmd, cp)) 143 error("%s: Unknown command.", cmd); 144 done: 145 sigsetmask(omask); 146 } 147 148 struct cmdtab * 149 lookup(name) 150 register char *name; 151 { 152 register char *p, *q; 153 register struct cmdtab *c, *found; 154 register int nmatches, longest; 155 156 longest = 0; 157 nmatches = 0; 158 found = (struct cmdtab *) 0; 159 for (c = cmdtab; p = c->c_name; c++) { 160 for (q = name; *q == *p++; q++) 161 if (*q == 0) /* exact match? */ 162 return (c); 163 if (!*q) { /* the name was a prefix */ 164 if (q - name > longest) { 165 longest = q - name; 166 nmatches = 1; 167 found = c; 168 } else if (q - name == longest) 169 nmatches++; 170 } 171 } 172 if (nmatches > 1) 173 return ((struct cmdtab *)-1); 174 return (found); 175 } 176 177 void 178 status() 179 { 180 181 error("Showing %s, refresh every %d seconds.", 182 curcmd->c_name, naptime); 183 } 184 185 int 186 prefix(s1, s2) 187 register char *s1, *s2; 188 { 189 190 while (*s1 == *s2) { 191 if (*s1 == '\0') 192 return (1); 193 s1++, s2++; 194 } 195 return (*s1 == '\0'); 196 } 197