1 /* $NetBSD: cmds.c,v 1.25 2000/12/01 02:19:43 simonb 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 1.25 2000/12/01 02:19:43 simonb Exp $"); 42 #endif /* not lint */ 43 44 #include <ctype.h> 45 #include <signal.h> 46 #include <string.h> 47 #include <unistd.h> 48 49 #include "systat.h" 50 #include "extern.h" 51 52 void switch_mode(struct mode *p); 53 54 void 55 command(char *cmd) 56 { 57 struct command *c; 58 struct mode *p; 59 char *args; 60 sigset_t set; 61 62 if (cmd[0] == '\0') 63 return; 64 65 sigemptyset(&set); 66 sigaddset(&set, SIGALRM); 67 sigprocmask(SIG_BLOCK, &set, NULL); 68 69 args = cmd; 70 cmd = strsep(&args, " \t"); 71 72 if (curmode->c_commands) { 73 for (c = curmode->c_commands; c->c_name; c++) { 74 if (strstr(c->c_name, cmd) == c->c_name) { 75 (c->c_cmd)(args); 76 goto done; 77 } 78 } 79 } 80 81 for (c = global_commands; c->c_name; c++) { 82 if (strstr(c->c_name, cmd) == c->c_name) { 83 (c->c_cmd)(args); 84 goto done; 85 } 86 } 87 88 for (p = modes; p->c_name; p++) { 89 if (strstr(p->c_name, cmd) == p->c_name) { 90 switch_mode(p); 91 goto done; 92 } 93 } 94 95 if (isdigit(cmd[0])) { 96 global_interval(cmd); 97 goto done; 98 } 99 100 error("%s: Unknown command.", cmd); 101 done: 102 sigprocmask(SIG_UNBLOCK, &set, NULL); 103 } 104 105 void 106 switch_mode(struct mode *p) 107 { 108 int switchfail; 109 struct mode *r; 110 111 switchfail = 0; 112 r = p; 113 114 if (curmode == p) { 115 status(); 116 return; 117 } 118 119 alarm(0); 120 (*curmode->c_close)(wnd); 121 wnd = (*p->c_open)(); 122 if (wnd == 0) { 123 wnd = (*curmode->c_open)(); 124 if (wnd == 0) { 125 error("Couldn't change back to previous mode"); 126 die(0); 127 } 128 129 p = curmode; 130 switchfail++; 131 } 132 133 if ((p->c_flags & CF_INIT) == 0) { 134 if ((*p->c_init)()) 135 p->c_flags |= CF_INIT; 136 else { 137 (*p->c_close)(wnd); 138 wnd = (*curmode->c_open)(); 139 p = curmode; 140 switchfail++; 141 } 142 } 143 144 curmode = p; 145 labels(); 146 display(0); 147 if (switchfail && !allflag) 148 error("Couldn't switch mode, back to %s", curmode->c_name); 149 else { 150 if (switchfail && allflag) { 151 r++; 152 switch_mode(r); 153 } else { 154 status(); 155 } 156 } 157 } 158 159 void 160 status(void) 161 { 162 error("Showing %s, refresh every %d seconds.", curmode->c_name, naptime); 163 } 164