console.c revision 1.1.2.3
1 1.1.2.3 yamt /* $NetBSD: console.c,v 1.1.2.3 2006/05/24 10:56:53 yamt Exp $ */ 2 1.1.2.2 yamt 3 1.1.2.2 yamt /*- 4 1.1.2.2 yamt * Copyright (c) 1998 Michael Smith <msmith (at) freebsd.org> 5 1.1.2.2 yamt * All rights reserved. 6 1.1.2.2 yamt * 7 1.1.2.2 yamt * Redistribution and use in source and binary forms, with or without 8 1.1.2.2 yamt * modification, are permitted provided that the following conditions 9 1.1.2.2 yamt * are met: 10 1.1.2.2 yamt * 1. Redistributions of source code must retain the above copyright 11 1.1.2.2 yamt * notice, this list of conditions and the following disclaimer. 12 1.1.2.2 yamt * 2. Redistributions in binary form must reproduce the above copyright 13 1.1.2.2 yamt * notice, this list of conditions and the following disclaimer in the 14 1.1.2.2 yamt * documentation and/or other materials provided with the distribution. 15 1.1.2.2 yamt * 16 1.1.2.2 yamt * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 1.1.2.2 yamt * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 1.1.2.2 yamt * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 1.1.2.2 yamt * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 1.1.2.2 yamt * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 1.1.2.2 yamt * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 1.1.2.2 yamt * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 1.1.2.2 yamt * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 1.1.2.2 yamt * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 1.1.2.2 yamt * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 1.1.2.2 yamt * SUCH DAMAGE. 27 1.1.2.2 yamt */ 28 1.1.2.2 yamt 29 1.1.2.2 yamt #include <sys/cdefs.h> 30 1.1.2.3 yamt /* __FBSDID("$FreeBSD: src/sys/boot/common/console.c,v 1.6 2003/08/25 23:30:41 obrien Exp $"); */ 31 1.1.2.2 yamt 32 1.1.2.2 yamt #include <lib/libsa/stand.h> 33 1.1.2.2 yamt #include <lib/libkern/libkern.h> 34 1.1.2.2 yamt 35 1.1.2.2 yamt #include "bootstrap.h" 36 1.1.2.2 yamt /* 37 1.1.2.2 yamt * Core console support 38 1.1.2.2 yamt */ 39 1.1.2.2 yamt 40 1.1.2.2 yamt static int cons_set(struct env_var *ev, int flags, void *value); 41 1.1.2.2 yamt static int cons_find(char *name); 42 1.1.2.2 yamt 43 1.1.2.2 yamt /* 44 1.1.2.2 yamt * Detect possible console(s) to use. The first probed console 45 1.1.2.2 yamt * is marked active. Also create the console variable. 46 1.1.2.2 yamt * 47 1.1.2.2 yamt * XXX Add logic for multiple console support. 48 1.1.2.2 yamt */ 49 1.1.2.2 yamt void 50 1.1.2.2 yamt cons_probe(void) 51 1.1.2.2 yamt { 52 1.1.2.2 yamt int cons; 53 1.1.2.2 yamt int active; 54 1.1.2.2 yamt char *prefconsole; 55 1.1.2.2 yamt 56 1.1.2.2 yamt /* Do all console probes */ 57 1.1.2.2 yamt for (cons = 0; consoles[cons] != NULL; cons++) { 58 1.1.2.2 yamt consoles[cons]->c_flags = 0; 59 1.1.2.2 yamt consoles[cons]->c_probe(consoles[cons]); 60 1.1.2.2 yamt } 61 1.1.2.2 yamt /* Now find the first working one */ 62 1.1.2.2 yamt active = -1; 63 1.1.2.2 yamt for (cons = 0; consoles[cons] != NULL && active == -1; cons++) { 64 1.1.2.2 yamt consoles[cons]->c_flags = 0; 65 1.1.2.2 yamt consoles[cons]->c_probe(consoles[cons]); 66 1.1.2.2 yamt if (consoles[cons]->c_flags == (C_PRESENTIN | C_PRESENTOUT)) 67 1.1.2.2 yamt active = cons; 68 1.1.2.2 yamt } 69 1.1.2.2 yamt 70 1.1.2.2 yamt /* Check to see if a console preference has already been registered */ 71 1.1.2.2 yamt prefconsole = getenv("console"); 72 1.1.2.2 yamt if (prefconsole != NULL) 73 1.1.2.2 yamt prefconsole = strdup(prefconsole); 74 1.1.2.2 yamt if (prefconsole != NULL) { 75 1.1.2.2 yamt unsetenv("console"); /* we want to replace this */ 76 1.1.2.2 yamt for (cons = 0; consoles[cons] != NULL; cons++) 77 1.1.2.2 yamt /* look for the nominated console, use it if it's functional */ 78 1.1.2.2 yamt if (!strcmp(prefconsole, consoles[cons]->c_name) && 79 1.1.2.2 yamt (consoles[cons]->c_flags == (C_PRESENTIN | C_PRESENTOUT))) 80 1.1.2.2 yamt active = cons; 81 1.1.2.2 yamt free(prefconsole); 82 1.1.2.2 yamt } 83 1.1.2.2 yamt if (active == -1) 84 1.1.2.2 yamt active = 0; 85 1.1.2.2 yamt consoles[active]->c_flags |= (C_ACTIVEIN | C_ACTIVEOUT); 86 1.1.2.2 yamt consoles[active]->c_init(0); 87 1.1.2.2 yamt 88 1.1.2.2 yamt printf("Console: %s\n", consoles[active]->c_desc); 89 1.1.2.2 yamt env_setenv("console", EV_VOLATILE, consoles[active]->c_name, (ev_sethook_t *) cons_set, 90 1.1.2.2 yamt env_nounset); 91 1.1.2.2 yamt } 92 1.1.2.2 yamt 93 1.1.2.2 yamt int 94 1.1.2.2 yamt getchar(void) 95 1.1.2.2 yamt { 96 1.1.2.2 yamt int cons; 97 1.1.2.2 yamt int rv; 98 1.1.2.2 yamt 99 1.1.2.2 yamt /* Loop forever polling all active consoles */ 100 1.1.2.2 yamt for(;;) 101 1.1.2.2 yamt for (cons = 0; consoles[cons] != NULL; cons++) 102 1.1.2.2 yamt if ((consoles[cons]->c_flags & C_ACTIVEIN) && 103 1.1.2.2 yamt ((rv = consoles[cons]->c_in()) != -1)) 104 1.1.2.2 yamt return(rv); 105 1.1.2.2 yamt } 106 1.1.2.2 yamt 107 1.1.2.2 yamt int 108 1.1.2.2 yamt ischar(void) 109 1.1.2.2 yamt { 110 1.1.2.2 yamt int cons; 111 1.1.2.2 yamt 112 1.1.2.2 yamt for (cons = 0; consoles[cons] != NULL; cons++) 113 1.1.2.2 yamt if ((consoles[cons]->c_flags & C_ACTIVEIN) && 114 1.1.2.2 yamt (consoles[cons]->c_ready() != 0)) 115 1.1.2.2 yamt return(1); 116 1.1.2.2 yamt return(0); 117 1.1.2.2 yamt } 118 1.1.2.2 yamt 119 1.1.2.2 yamt void 120 1.1.2.2 yamt putchar(int c) 121 1.1.2.2 yamt { 122 1.1.2.2 yamt int cons; 123 1.1.2.2 yamt 124 1.1.2.2 yamt /* Expand newlines */ 125 1.1.2.2 yamt if (c == '\n') 126 1.1.2.2 yamt putchar('\r'); 127 1.1.2.2 yamt 128 1.1.2.2 yamt for (cons = 0; consoles[cons] != NULL; cons++) 129 1.1.2.2 yamt if (consoles[cons]->c_flags & C_ACTIVEOUT) 130 1.1.2.2 yamt consoles[cons]->c_out(c); 131 1.1.2.2 yamt } 132 1.1.2.2 yamt 133 1.1.2.2 yamt static int 134 1.1.2.2 yamt cons_find(char *name) 135 1.1.2.2 yamt { 136 1.1.2.2 yamt int cons; 137 1.1.2.2 yamt 138 1.1.2.2 yamt for (cons = 0; consoles[cons] != NULL; cons++) 139 1.1.2.2 yamt if (!strcmp(consoles[cons]->c_name, name)) 140 1.1.2.2 yamt return(cons); 141 1.1.2.2 yamt return(-1); 142 1.1.2.2 yamt } 143 1.1.2.2 yamt 144 1.1.2.2 yamt 145 1.1.2.2 yamt /* 146 1.1.2.2 yamt * Select a console. 147 1.1.2.2 yamt * 148 1.1.2.2 yamt * XXX Note that the console system design allows for some extension 149 1.1.2.2 yamt * here (eg. multiple consoles, input/output only, etc.) 150 1.1.2.2 yamt */ 151 1.1.2.2 yamt static int 152 1.1.2.2 yamt cons_set(struct env_var *ev, int flags, void *value) 153 1.1.2.2 yamt { 154 1.1.2.2 yamt int cons, active; 155 1.1.2.2 yamt 156 1.1.2.2 yamt if ((value == NULL) || ((active = cons_find(value)) == -1)) { 157 1.1.2.2 yamt if (value != NULL) 158 1.1.2.2 yamt printf("no such console '%s'\n", (char *)value); 159 1.1.2.2 yamt printf("Available consoles:\n"); 160 1.1.2.2 yamt for (cons = 0; consoles[cons] != NULL; cons++) 161 1.1.2.2 yamt printf(" %s\n", consoles[cons]->c_name); 162 1.1.2.2 yamt return(CMD_ERROR); 163 1.1.2.2 yamt } 164 1.1.2.2 yamt 165 1.1.2.2 yamt /* disable all current consoles */ 166 1.1.2.2 yamt for (cons = 0; consoles[cons] != NULL; cons++) 167 1.1.2.2 yamt consoles[cons]->c_flags &= ~(C_ACTIVEIN | C_ACTIVEOUT); 168 1.1.2.2 yamt 169 1.1.2.2 yamt /* enable selected console */ 170 1.1.2.2 yamt consoles[active]->c_flags |= C_ACTIVEIN | C_ACTIVEOUT; 171 1.1.2.2 yamt consoles[active]->c_init(0); 172 1.1.2.2 yamt 173 1.1.2.2 yamt env_setenv(ev->ev_name, flags | EV_NOHOOK, value, NULL, NULL); 174 1.1.2.2 yamt return(CMD_OK); 175 1.1.2.2 yamt } 176
Indexes created Fri Oct 03 02:09:57 GMT 2025