1 /* $NetBSD: cmds.c,v 1.21 2000/06/05 21:48:25 mycroft 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 #include <sys/cdefs.h> 37 #ifndef lint 38 #if 0 39 static char sccsid[] = "@(#)cmds.c 8.2 (Berkeley) 4/29/95"; 40 #endif 41 __RCSID("$NetBSD: cmds.c,v 1.21 2000/06/05 21:48:25 mycroft Exp $"); 42 #endif /* not lint */ 43 44 #include <stdlib.h> 45 #include <unistd.h> 46 #include <signal.h> 47 #include <ctype.h> 48 #include <string.h> 49 #include "systat.h" 50 #include "extern.h" 51 52 void switch_mode __P((struct mode *p)); 53 54 void 55 command(cmd) 56 char *cmd; 57 { 58 struct command *c; 59 struct mode *p; 60 char *args; 61 sigset_t set; 62 63 sigemptyset(&set); 64 sigaddset(&set, SIGALRM); 65 sigprocmask(SIG_BLOCK, &set, NULL); 66 67 args = cmd; 68 cmd = strsep(&args, " \t"); 69 70 if (curmode->c_commands) { 71 for (c = curmode->c_commands; c->c_name; c++) { 72 if (strstr(c->c_name, cmd) == c->c_name) { 73 (c->c_cmd)(args); 74 goto done; 75 } 76 } 77 } 78 79 for (c = global_commands; c->c_name; c++) { 80 if (strstr(c->c_name, cmd) == c->c_name) { 81 (c->c_cmd)(args); 82 goto done; 83 } 84 } 85 86 for (p = modes; p->c_name; p++) { 87 if (strstr(p->c_name, cmd) == p->c_name) { 88 switch_mode(p); 89 goto done; 90 } 91 } 92 93 if (isdigit(cmd[0])) { 94 global_interval(cmd); 95 goto done; 96 } 97 98 error("%s: Unknown command.", cmd); 99 done: 100 sigprocmask(SIG_UNBLOCK, &set, NULL); 101 } 102 103 void 104 switch_mode(p) 105 struct mode *p; 106 { 107 int switchfail; 108 109 switchfail = 0; 110 111 if (curmode == p) 112 return; 113 114 alarm(0); 115 (*curmode->c_close)(wnd); 116 wnd = (*p->c_open)(); 117 if (wnd == 0) { 118 wnd = (*curmode->c_open)(); 119 if (wnd == 0) { 120 error("Couldn't change back to previous mode"); 121 die(0); 122 } 123 124 p = curmode; 125 switchfail++; 126 } 127 128 if ((p->c_flags & CF_INIT) == 0) { 129 if ((*p->c_init)()) 130 p->c_flags |= CF_INIT; 131 else { 132 (*p->c_close)(wnd); 133 wnd = (*curmode->c_open)(); 134 p = curmode; 135 switchfail++; 136 } 137 } 138 139 curmode = p; 140 labels(); 141 display(0); 142 if (switchfail) 143 error("Couldn't switch mode, back to %s", curmode->c_name); 144 else 145 status(); 146 } 147 148 void 149 status() 150 { 151 error("Showing %s, refresh every %d seconds.", curmode->c_name, naptime); 152 } 153