/*- * Copyright (c) 1998 Michael Smith * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include __FBSDID("$FreeBSD$"); #include #include #include "bootstrap.h" /* * Core console support */ static int cons_set(struct env_var *ev, int flags, const void *value); static int cons_find(const char *name); static int cons_check(const char *string); static void cons_change(const char *string); /* * Detect possible console(s) to use. If preferred console(s) have been * specified, mark them as active. Else, mark the first probed console * as active. Also create the console variable. */ void cons_probe(void) { int cons; int active; char *prefconsole; /* Do all console probes */ for (cons = 0; consoles[cons] != NULL; cons++) { consoles[cons]->c_flags = 0; consoles[cons]->c_probe(consoles[cons]); } /* Now find the first working one */ active = -1; for (cons = 0; consoles[cons] != NULL && active == -1; cons++) { consoles[cons]->c_flags = 0; consoles[cons]->c_probe(consoles[cons]); if (consoles[cons]->c_flags == (C_PRESENTIN | C_PRESENTOUT)) active = cons; } /* Force a console even if all probes failed */ if (active == -1) active = 0; /* Check to see if a console preference has already been registered */ prefconsole = getenv("console"); if (prefconsole != NULL) prefconsole = strdup(prefconsole); if (prefconsole != NULL) { unsetenv("console"); /* we want to replace this */ cons_change(prefconsole); } else { consoles[active]->c_flags |= C_ACTIVEIN | C_ACTIVEOUT; consoles[active]->c_init(0); prefconsole = strdup(consoles[active]->c_name); } printf("Consoles: "); for (cons = 0; consoles[cons] != NULL; cons++) if (consoles[cons]->c_flags & (C_ACTIVEIN | C_ACTIVEOUT)) printf("%s ", consoles[cons]->c_desc); printf("\n"); if (prefconsole != NULL) { env_setenv("console", EV_VOLATILE, prefconsole, cons_set, env_nounset); free(prefconsole); } } int getchar(void) { int cons; int rv; /* Loop forever polling all active consoles */ for(;;) for (cons = 0; consoles[cons] != NULL; cons++) if ((consoles[cons]->c_flags & C_ACTIVEIN) && ((rv = consoles[cons]->c_in()) != -1)) return(rv); } int ischar(void) { int cons; for (cons = 0; consoles[cons] != NULL; cons++) if ((consoles[cons]->c_flags & C_ACTIVEIN) && (consoles[cons]->c_ready() != 0)) return(1); return(0); } void putchar(int c) { int cons; /* Expand newlines */ if (c == '\n') putchar('\r'); for (cons = 0; consoles[cons] != NULL; cons++) if (consoles[cons]->c_flags & C_ACTIVEOUT) consoles[cons]->c_out(c); } /* * Find the console with the specified name. */ static int cons_find(const char *name) { int cons; for (cons = 0; consoles[cons] != NULL; cons++) if (!strcmp(consoles[cons]->c_name, name)) return (cons); return (-1); } /* * Select one or more consoles. */ static int cons_set(struct env_var *ev, int flags, const void *value) { int cons; if ((value == NULL) || (cons_check(value) == -1)) { if (value != NULL) printf("no such console!\n"); printf("Available consoles:\n"); for (cons = 0; consoles[cons] != NULL; cons++) printf(" %s\n", consoles[cons]->c_name); return(CMD_ERROR); } cons_change(value); env_setenv(ev->ev_name, flags | EV_NOHOOK, value, NULL, NULL); return(CMD_OK); } /* * Check that all of the consoles listed in *string are valid consoles */ static int cons_check(const char *string) { int cons; char *curpos, *dup, *next; dup = next = strdup(string); cons = -1; while (next != NULL) { curpos = strsep(&next, " ,"); if (*curpos != '\0') { cons = cons_find(curpos); if (cons == -1) break; } } free(dup); return (cons); } /* * Activate all of the consoles listed in *string and disable all the others. */ static void cons_change(const char *string) { int cons; char *curpos, *dup, *next; /* Disable all consoles */ for (cons = 0; consoles[cons] != NULL; cons++) { consoles[cons]->c_flags &= ~(C_ACTIVEIN | C_ACTIVEOUT); } /* Enable selected consoles */ dup = next = strdup(string); while (next != NULL) { curpos = strsep(&next, " ,"); if (*curpos == '\0') continue; cons = cons_find(curpos); if (cons > 0) { consoles[cons]->c_flags |= C_ACTIVEIN | C_ACTIVEOUT; consoles[cons]->c_init(0); } } free(dup); }