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 1.4 2003/10/04 20:36:51 hmp 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(char *cmd) 48 { 49 register struct cmdtab *p; 50 register char *cp; 51 int omask; 52 double interval; 53 54 omask = sigblock(sigmask(SIGALRM)); 55 for (cp = cmd; *cp && !isspace(*cp); cp++) 56 ; 57 if (*cp) 58 *cp++ = '\0'; 59 if (*cmd == '\0') 60 return; 61 for (; *cp && isspace(*cp); cp++) 62 ; 63 if (strcmp(cmd, "quit") == 0 || strcmp(cmd, "q") == 0) 64 die(0); 65 if (strcmp(cmd, "load") == 0) { 66 load(); 67 goto done; 68 } 69 if (strcmp(cmd, "stop") == 0) { 70 alarm(0); 71 mvaddstr(CMDLINE, 0, "Refresh disabled."); 72 clrtoeol(); 73 goto done; 74 } 75 if (strcmp(cmd, "help") == 0) { 76 int col, len; 77 78 move(CMDLINE, col = 0); 79 for (p = cmdtab; p->c_name; p++) { 80 len = strlen(p->c_name); 81 if (col + len > COLS) 82 break; 83 addstr(p->c_name); col += len; 84 if (col + 1 < COLS) 85 addch(' '); 86 } 87 clrtoeol(); 88 goto done; 89 } 90 interval = strtod(cmd, NULL); 91 if (interval <= 0.0 && 92 (strcmp(cmd, "start") == 0 || strcmp(cmd, "interval") == 0)) { 93 interval = *cp ? strtod(cp, NULL) : naptime; 94 if (interval <= 0.0) { 95 error("%3.2f: bad interval.", interval); 96 goto done; 97 } 98 } 99 if (interval > 0.0) { 100 alarm(0); 101 naptime = interval; 102 display(0); 103 status(); 104 goto done; 105 } 106 p = lookup(cmd); 107 if (p == (struct cmdtab *)-1) { 108 error("%s: Ambiguous command.", cmd); 109 goto done; 110 } 111 if (p) { 112 if (curcmd == p) 113 goto done; 114 alarm(0); 115 (*curcmd->c_close)(wnd); 116 wnd = (*p->c_open)(); 117 if (wnd == 0) { 118 error("Couldn't open new display"); 119 wnd = (*curcmd->c_open)(); 120 if (wnd == 0) { 121 error("Couldn't change back to previous cmd"); 122 exit(1); 123 } 124 p = curcmd; 125 } 126 if ((p->c_flags & CF_INIT) == 0) { 127 if ((*p->c_init)()) 128 p->c_flags |= CF_INIT; 129 else 130 goto done; 131 } 132 curcmd = p; 133 labels(); 134 display(0); 135 status(); 136 goto done; 137 } 138 if (curcmd->c_cmd == 0 || !(*curcmd->c_cmd)(cmd, cp)) 139 error("%s: Unknown command.", cmd); 140 done: 141 sigsetmask(omask); 142 } 143 144 struct cmdtab * 145 lookup(register char *name) 146 { 147 register char *p, *q; 148 register struct cmdtab *c, *found; 149 register int nmatches, longest; 150 151 longest = 0; 152 nmatches = 0; 153 found = (struct cmdtab *) 0; 154 for (c = cmdtab; p = c->c_name; c++) { 155 for (q = name; *q == *p++; q++) 156 if (*q == 0) /* exact match? */ 157 return (c); 158 if (!*q) { /* the name was a prefix */ 159 if (q - name > longest) { 160 longest = q - name; 161 nmatches = 1; 162 found = c; 163 } else if (q - name == longest) 164 nmatches++; 165 } 166 } 167 if (nmatches > 1) 168 return ((struct cmdtab *)-1); 169 return (found); 170 } 171 172 void 173 status(void) 174 { 175 176 error("Showing %s, refresh every %3.2f seconds.", 177 curcmd->c_name, naptime); 178 } 179 180 int 181 prefix(register char *s1, register char *s2) 182 { 183 184 while (*s1 == *s2) { 185 if (*s1 == '\0') 186 return (1); 187 s1++, s2++; 188 } 189 return (*s1 == '\0'); 190 } 191