1 /* $NetBSD: cmds.c,v 1.26 2003/08/07 11:15:57 agc 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. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 #if 0 35 static char sccsid[] = "@(#)cmds.c 8.2 (Berkeley) 4/29/95"; 36 #endif 37 __RCSID("$NetBSD: cmds.c,v 1.26 2003/08/07 11:15:57 agc Exp $"); 38 #endif /* not lint */ 39 40 #include <ctype.h> 41 #include <signal.h> 42 #include <string.h> 43 #include <unistd.h> 44 45 #include "systat.h" 46 #include "extern.h" 47 48 void switch_mode(struct mode *p); 49 50 void 51 command(char *cmd) 52 { 53 struct command *c; 54 struct mode *p; 55 char *args; 56 sigset_t set; 57 58 if (cmd[0] == '\0') 59 return; 60 61 sigemptyset(&set); 62 sigaddset(&set, SIGALRM); 63 sigprocmask(SIG_BLOCK, &set, NULL); 64 65 args = cmd; 66 cmd = strsep(&args, " \t"); 67 68 if (curmode->c_commands) { 69 for (c = curmode->c_commands; c->c_name; c++) { 70 if (strstr(c->c_name, cmd) == c->c_name) { 71 (c->c_cmd)(args); 72 goto done; 73 } 74 } 75 } 76 77 for (c = global_commands; c->c_name; c++) { 78 if (strstr(c->c_name, cmd) == c->c_name) { 79 (c->c_cmd)(args); 80 goto done; 81 } 82 } 83 84 for (p = modes; p->c_name; p++) { 85 if (strstr(p->c_name, cmd) == p->c_name) { 86 switch_mode(p); 87 goto done; 88 } 89 } 90 91 if (isdigit(cmd[0])) { 92 global_interval(cmd); 93 goto done; 94 } 95 96 error("%s: Unknown command.", cmd); 97 done: 98 sigprocmask(SIG_UNBLOCK, &set, NULL); 99 } 100 101 void 102 switch_mode(struct mode *p) 103 { 104 int switchfail; 105 struct mode *r; 106 107 switchfail = 0; 108 r = p; 109 110 if (curmode == p) { 111 status(); 112 return; 113 } 114 115 alarm(0); 116 (*curmode->c_close)(wnd); 117 wnd = (*p->c_open)(); 118 if (wnd == 0) { 119 wnd = (*curmode->c_open)(); 120 if (wnd == 0) { 121 error("Couldn't change back to previous mode"); 122 die(0); 123 } 124 125 p = curmode; 126 switchfail++; 127 } 128 129 if ((p->c_flags & CF_INIT) == 0) { 130 if ((*p->c_init)()) 131 p->c_flags |= CF_INIT; 132 else { 133 (*p->c_close)(wnd); 134 wnd = (*curmode->c_open)(); 135 p = curmode; 136 switchfail++; 137 } 138 } 139 140 curmode = p; 141 labels(); 142 display(0); 143 if (switchfail && !allflag) 144 error("Couldn't switch mode, back to %s", curmode->c_name); 145 else { 146 if (switchfail && allflag) { 147 r++; 148 switch_mode(r); 149 } else { 150 status(); 151 } 152 } 153 } 154 155 void 156 status(void) 157 { 158 error("Showing %s, refresh every %d seconds.", curmode->c_name, naptime); 159 } 160