console.c revision 1.2.2.2
1 1.2.2.2 simonb /* $NetBSD: console.c,v 1.2.2.2 2006/04/22 11:37:38 simonb Exp $ */ 2 1.2.2.2 simonb 3 1.2.2.2 simonb /*- 4 1.2.2.2 simonb * Copyright (c) 1998 Michael Smith <msmith (at) freebsd.org> 5 1.2.2.2 simonb * All rights reserved. 6 1.2.2.2 simonb * 7 1.2.2.2 simonb * Redistribution and use in source and binary forms, with or without 8 1.2.2.2 simonb * modification, are permitted provided that the following conditions 9 1.2.2.2 simonb * are met: 10 1.2.2.2 simonb * 1. Redistributions of source code must retain the above copyright 11 1.2.2.2 simonb * notice, this list of conditions and the following disclaimer. 12 1.2.2.2 simonb * 2. Redistributions in binary form must reproduce the above copyright 13 1.2.2.2 simonb * notice, this list of conditions and the following disclaimer in the 14 1.2.2.2 simonb * documentation and/or other materials provided with the distribution. 15 1.2.2.2 simonb * 16 1.2.2.2 simonb * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 1.2.2.2 simonb * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 1.2.2.2 simonb * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 1.2.2.2 simonb * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 1.2.2.2 simonb * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 1.2.2.2 simonb * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 1.2.2.2 simonb * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 1.2.2.2 simonb * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 1.2.2.2 simonb * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 1.2.2.2 simonb * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 1.2.2.2 simonb * SUCH DAMAGE. 27 1.2.2.2 simonb */ 28 1.2.2.2 simonb 29 1.2.2.2 simonb #include <sys/cdefs.h> 30 1.2.2.2 simonb 31 1.2.2.2 simonb #include <lib/libsa/stand.h> 32 1.2.2.2 simonb #include <lib/libkern/libkern.h> 33 1.2.2.2 simonb 34 1.2.2.2 simonb #include "bootstrap.h" 35 1.2.2.2 simonb /* 36 1.2.2.2 simonb * Core console support 37 1.2.2.2 simonb */ 38 1.2.2.2 simonb 39 1.2.2.2 simonb static int cons_set(struct env_var *ev, int flags, void *value); 40 1.2.2.2 simonb static int cons_find(char *name); 41 1.2.2.2 simonb 42 1.2.2.2 simonb /* 43 1.2.2.2 simonb * Detect possible console(s) to use. The first probed console 44 1.2.2.2 simonb * is marked active. Also create the console variable. 45 1.2.2.2 simonb * 46 1.2.2.2 simonb * XXX Add logic for multiple console support. 47 1.2.2.2 simonb */ 48 1.2.2.2 simonb void 49 1.2.2.2 simonb cons_probe(void) 50 1.2.2.2 simonb { 51 1.2.2.2 simonb int cons; 52 1.2.2.2 simonb int active; 53 1.2.2.2 simonb char *prefconsole; 54 1.2.2.2 simonb 55 1.2.2.2 simonb /* Do all console probes */ 56 1.2.2.2 simonb for (cons = 0; consoles[cons] != NULL; cons++) { 57 1.2.2.2 simonb consoles[cons]->c_flags = 0; 58 1.2.2.2 simonb consoles[cons]->c_probe(consoles[cons]); 59 1.2.2.2 simonb } 60 1.2.2.2 simonb /* Now find the first working one */ 61 1.2.2.2 simonb active = -1; 62 1.2.2.2 simonb for (cons = 0; consoles[cons] != NULL && active == -1; cons++) { 63 1.2.2.2 simonb consoles[cons]->c_flags = 0; 64 1.2.2.2 simonb consoles[cons]->c_probe(consoles[cons]); 65 1.2.2.2 simonb if (consoles[cons]->c_flags == (C_PRESENTIN | C_PRESENTOUT)) 66 1.2.2.2 simonb active = cons; 67 1.2.2.2 simonb } 68 1.2.2.2 simonb 69 1.2.2.2 simonb /* Check to see if a console preference has already been registered */ 70 1.2.2.2 simonb prefconsole = getenv("console"); 71 1.2.2.2 simonb if (prefconsole != NULL) 72 1.2.2.2 simonb prefconsole = strdup(prefconsole); 73 1.2.2.2 simonb if (prefconsole != NULL) { 74 1.2.2.2 simonb unsetenv("console"); /* we want to replace this */ 75 1.2.2.2 simonb for (cons = 0; consoles[cons] != NULL; cons++) 76 1.2.2.2 simonb /* look for the nominated console, use it if it's functional */ 77 1.2.2.2 simonb if (!strcmp(prefconsole, consoles[cons]->c_name) && 78 1.2.2.2 simonb (consoles[cons]->c_flags == (C_PRESENTIN | C_PRESENTOUT))) 79 1.2.2.2 simonb active = cons; 80 1.2.2.2 simonb free(prefconsole); 81 1.2.2.2 simonb } 82 1.2.2.2 simonb if (active == -1) 83 1.2.2.2 simonb active = 0; 84 1.2.2.2 simonb consoles[active]->c_flags |= (C_ACTIVEIN | C_ACTIVEOUT); 85 1.2.2.2 simonb consoles[active]->c_init(0); 86 1.2.2.2 simonb 87 1.2.2.2 simonb printf("Console: %s\n", consoles[active]->c_desc); 88 1.2.2.2 simonb env_setenv("console", EV_VOLATILE, consoles[active]->c_name, (ev_sethook_t *) cons_set, 89 1.2.2.2 simonb env_nounset); 90 1.2.2.2 simonb } 91 1.2.2.2 simonb 92 1.2.2.2 simonb int 93 1.2.2.2 simonb getchar(void) 94 1.2.2.2 simonb { 95 1.2.2.2 simonb int cons; 96 1.2.2.2 simonb int rv; 97 1.2.2.2 simonb 98 1.2.2.2 simonb /* Loop forever polling all active consoles */ 99 1.2.2.2 simonb for(;;) 100 1.2.2.2 simonb for (cons = 0; consoles[cons] != NULL; cons++) 101 1.2.2.2 simonb if ((consoles[cons]->c_flags & C_ACTIVEIN) && 102 1.2.2.2 simonb ((rv = consoles[cons]->c_in()) != -1)) 103 1.2.2.2 simonb return(rv); 104 1.2.2.2 simonb } 105 1.2.2.2 simonb 106 1.2.2.2 simonb int 107 1.2.2.2 simonb ischar(void) 108 1.2.2.2 simonb { 109 1.2.2.2 simonb int cons; 110 1.2.2.2 simonb 111 1.2.2.2 simonb for (cons = 0; consoles[cons] != NULL; cons++) 112 1.2.2.2 simonb if ((consoles[cons]->c_flags & C_ACTIVEIN) && 113 1.2.2.2 simonb (consoles[cons]->c_ready() != 0)) 114 1.2.2.2 simonb return(1); 115 1.2.2.2 simonb return(0); 116 1.2.2.2 simonb } 117 1.2.2.2 simonb 118 1.2.2.2 simonb void 119 1.2.2.2 simonb putchar(int c) 120 1.2.2.2 simonb { 121 1.2.2.2 simonb int cons; 122 1.2.2.2 simonb 123 1.2.2.2 simonb /* Expand newlines */ 124 1.2.2.2 simonb if (c == '\n') 125 1.2.2.2 simonb putchar('\r'); 126 1.2.2.2 simonb 127 1.2.2.2 simonb for (cons = 0; consoles[cons] != NULL; cons++) 128 1.2.2.2 simonb if (consoles[cons]->c_flags & C_ACTIVEOUT) 129 1.2.2.2 simonb consoles[cons]->c_out(c); 130 1.2.2.2 simonb } 131 1.2.2.2 simonb 132 1.2.2.2 simonb static int 133 1.2.2.2 simonb cons_find(char *name) 134 1.2.2.2 simonb { 135 1.2.2.2 simonb int cons; 136 1.2.2.2 simonb 137 1.2.2.2 simonb for (cons = 0; consoles[cons] != NULL; cons++) 138 1.2.2.2 simonb if (!strcmp(consoles[cons]->c_name, name)) 139 1.2.2.2 simonb return(cons); 140 1.2.2.2 simonb return(-1); 141 1.2.2.2 simonb } 142 1.2.2.2 simonb 143 1.2.2.2 simonb 144 1.2.2.2 simonb /* 145 1.2.2.2 simonb * Select a console. 146 1.2.2.2 simonb * 147 1.2.2.2 simonb * XXX Note that the console system design allows for some extension 148 1.2.2.2 simonb * here (eg. multiple consoles, input/output only, etc.) 149 1.2.2.2 simonb */ 150 1.2.2.2 simonb static int 151 1.2.2.2 simonb cons_set(struct env_var *ev, int flags, void *value) 152 1.2.2.2 simonb { 153 1.2.2.2 simonb int cons, active; 154 1.2.2.2 simonb 155 1.2.2.2 simonb if ((value == NULL) || ((active = cons_find(value)) == -1)) { 156 1.2.2.2 simonb if (value != NULL) 157 1.2.2.2 simonb printf("no such console '%s'\n", (char *)value); 158 1.2.2.2 simonb printf("Available consoles:\n"); 159 1.2.2.2 simonb for (cons = 0; consoles[cons] != NULL; cons++) 160 1.2.2.2 simonb printf(" %s\n", consoles[cons]->c_name); 161 1.2.2.2 simonb return(CMD_ERROR); 162 1.2.2.2 simonb } 163 1.2.2.2 simonb 164 1.2.2.2 simonb /* disable all current consoles */ 165 1.2.2.2 simonb for (cons = 0; consoles[cons] != NULL; cons++) 166 1.2.2.2 simonb consoles[cons]->c_flags &= ~(C_ACTIVEIN | C_ACTIVEOUT); 167 1.2.2.2 simonb 168 1.2.2.2 simonb /* enable selected console */ 169 1.2.2.2 simonb consoles[active]->c_flags |= C_ACTIVEIN | C_ACTIVEOUT; 170 1.2.2.2 simonb consoles[active]->c_init(0); 171 1.2.2.2 simonb 172 1.2.2.2 simonb env_setenv(ev->ev_name, flags | EV_NOHOOK, value, NULL, NULL); 173 1.2.2.2 simonb return(CMD_OK); 174 1.2.2.2 simonb } 175
Indexes created Fri Oct 03 02:09:57 GMT 2025