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 * @(#)cmds.c 8.2 (Berkeley) 4/29/95 34 * $FreeBSD: src/usr.bin/systat/cmds.c,v 1.3 1999/08/28 01:05:58 peter Exp $ 35 * $DragonFly: src/usr.bin/systat/cmds.c,v 1.3 2003/07/12 03:09:50 dillon Exp $ 36 */ 37 38 #include <stdlib.h> 39 #include <unistd.h> 40 #include <signal.h> 41 #include <ctype.h> 42 #include <string.h> 43 #include "systat.h" 44 #include "extern.h" 45 46 void 47 command(cmd) 48 char *cmd; 49 { 50 register struct cmdtab *p; 51 register char *cp; 52 int omask; 53 double interval; 54 55 omask = sigblock(sigmask(SIGALRM)); 56 for (cp = cmd; *cp && !isspace(*cp); cp++) 57 ; 58 if (*cp) 59 *cp++ = '\0'; 60 if (*cmd == '\0') 61 return; 62 for (; *cp && isspace(*cp); cp++) 63 ; 64 if (strcmp(cmd, "quit") == 0 || strcmp(cmd, "q") == 0) 65 die(0); 66 if (strcmp(cmd, "load") == 0) { 67 load(); 68 goto done; 69 } 70 if (strcmp(cmd, "stop") == 0) { 71 alarm(0); 72 mvaddstr(CMDLINE, 0, "Refresh disabled."); 73 clrtoeol(); 74 goto done; 75 } 76 if (strcmp(cmd, "help") == 0) { 77 int col, len; 78 79 move(CMDLINE, col = 0); 80 for (p = cmdtab; p->c_name; p++) { 81 len = strlen(p->c_name); 82 if (col + len > COLS) 83 break; 84 addstr(p->c_name); col += len; 85 if (col + 1 < COLS) 86 addch(' '); 87 } 88 clrtoeol(); 89 goto done; 90 } 91 interval = strtod(cmd, NULL); 92 if (interval <= 0.0 && 93 (strcmp(cmd, "start") == 0 || strcmp(cmd, "interval") == 0)) { 94 interval = *cp ? strtod(cp, NULL) : naptime; 95 if (interval <= 0.0) { 96 error("%3.2f: bad interval.", interval); 97 goto done; 98 } 99 } 100 if (interval > 0.0) { 101 alarm(0); 102 naptime = interval; 103 display(0); 104 status(); 105 goto done; 106 } 107 p = lookup(cmd); 108 if (p == (struct cmdtab *)-1) { 109 error("%s: Ambiguous command.", cmd); 110 goto done; 111 } 112 if (p) { 113 if (curcmd == p) 114 goto done; 115 alarm(0); 116 (*curcmd->c_close)(wnd); 117 wnd = (*p->c_open)(); 118 if (wnd == 0) { 119 error("Couldn't open new display"); 120 wnd = (*curcmd->c_open)(); 121 if (wnd == 0) { 122 error("Couldn't change back to previous cmd"); 123 exit(1); 124 } 125 p = curcmd; 126 } 127 if ((p->c_flags & CF_INIT) == 0) { 128 if ((*p->c_init)()) 129 p->c_flags |= CF_INIT; 130 else 131 goto done; 132 } 133 curcmd = p; 134 labels(); 135 display(0); 136 status(); 137 goto done; 138 } 139 if (curcmd->c_cmd == 0 || !(*curcmd->c_cmd)(cmd, cp)) 140 error("%s: Unknown command.", cmd); 141 done: 142 sigsetmask(omask); 143 } 144 145 struct cmdtab * 146 lookup(name) 147 register char *name; 148 { 149 register char *p, *q; 150 register struct cmdtab *c, *found; 151 register int nmatches, longest; 152 153 longest = 0; 154 nmatches = 0; 155 found = (struct cmdtab *) 0; 156 for (c = cmdtab; p = c->c_name; c++) { 157 for (q = name; *q == *p++; q++) 158 if (*q == 0) /* exact match? */ 159 return (c); 160 if (!*q) { /* the name was a prefix */ 161 if (q - name > longest) { 162 longest = q - name; 163 nmatches = 1; 164 found = c; 165 } else if (q - name == longest) 166 nmatches++; 167 } 168 } 169 if (nmatches > 1) 170 return ((struct cmdtab *)-1); 171 return (found); 172 } 173 174 void 175 status() 176 { 177 178 error("Showing %s, refresh every %3.2f seconds.", 179 curcmd->c_name, naptime); 180 } 181 182 int 183 prefix(s1, s2) 184 register char *s1, *s2; 185 { 186 187 while (*s1 == *s2) { 188 if (*s1 == '\0') 189 return (1); 190 s1++, s2++; 191 } 192 return (*s1 == '\0'); 193 } 194