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      1 /*	$NetBSD: bootmenu.c,v 1.5 2016/06/11 06:58:42 dholland Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2008 The NetBSD Foundation, Inc.
      5  * 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  *
     16  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     26  * POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #include <sys/types.h>
     30 #include <sys/reboot.h>
     31 #include <sys/bootblock.h>
     32 
     33 #include "boot.h"
     34 #include "unixdev.h"
     35 #include "bootmenu.h"
     36 #include "pathnames.h"
     37 
     38 #define MENUFORMAT_AUTO	  0
     39 #define MENUFORMAT_NUMBER 1
     40 #define MENUFORMAT_LETTER 2
     41 
     42 void
     43 parsebootconf(const char *conf)
     44 {
     45 	perform_bootcfg(conf, &bootcfg_do_noop, 0);
     46 }
     47 
     48 /*
     49  * doboottypemenu will render the menu and parse any user input
     50  */
     51 static int
     52 getchoicefrominput(char *input, int def)
     53 {
     54 	int choice = -1;
     55 
     56 	if (*input == '\0' || *input == '\r' || *input == '\n')
     57 		choice = def;
     58 	else if (*input >= 'A' && *input < bootcfg_info.nummenu + 'A')
     59 		choice = (*input) - 'A';
     60 	else if (*input >= 'a' && *input < bootcfg_info.nummenu + 'a')
     61 		choice = (*input) - 'a';
     62 	else if (isdigit(*input)) {
     63 		choice = atoi(input) - 1;
     64 		if (choice < 0 || choice >= bootcfg_info.nummenu)
     65 			choice = -1;
     66 	}
     67 	return choice;
     68 }
     69 
     70 void
     71 doboottypemenu(void)
     72 {
     73 	char input[80], *ic, *oc;
     74 	int choice;
     75 
     76 	printf("\n");
     77 	/* Display menu */
     78 	if (bootcfg_info.menuformat == MENUFORMAT_LETTER) {
     79 		for (choice = 0; choice < bootcfg_info.nummenu; choice++)
     80 			printf("    %c. %s\n", choice + 'A',
     81 			    bootcfg_info.desc[choice]);
     82 	} else {
     83 		/* Can't use %2d format string with libsa */
     84 		for (choice = 0; choice < bootcfg_info.nummenu; choice++)
     85 			printf("    %s%d. %s\n",
     86 			    (choice < 9) ?  " " : "",
     87 			    choice + 1,
     88 			    bootcfg_info.desc[choice]);
     89 	}
     90 	choice = -1;
     91 	for (;;) {
     92 		input[0] = '\0';
     93 
     94 		if (bootcfg_info.timeout < 0) {
     95 			if (bootcfg_info.menuformat == MENUFORMAT_LETTER)
     96 				printf("\nOption: [%c]:",
     97 				    bootcfg_info.def + 'A');
     98 			else
     99 				printf("\nOption: [%d]:",
    100 				    bootcfg_info.def + 1);
    101 
    102 			kgets(input, sizeof(input));
    103 			choice = getchoicefrominput(input, bootcfg_info.def);
    104 		} else if (bootcfg_info.timeout == 0)
    105 			choice = bootcfg_info.def;
    106 		else  {
    107 			printf("\nChoose an option; RETURN for default; "
    108 			       "SPACE to stop countdown.\n");
    109 			if (bootcfg_info.menuformat == MENUFORMAT_LETTER)
    110 				printf("Option %c will be chosen in ",
    111 				    bootcfg_info.def + 'A');
    112 			else
    113 				printf("Option %d will be chosen in ",
    114 				    bootcfg_info.def + 1);
    115 			input[0] = awaitkey(bootcfg_info.timeout, 1);
    116 			input[1] = '\0';
    117 			choice = getchoicefrominput(input, bootcfg_info.def);
    118 			/* If invalid key pressed, drop to menu */
    119 			if (choice == -1)
    120 				bootcfg_info.timeout = -1;
    121 		}
    122 		if (choice < 0)
    123 			continue;
    124 		if (!strcmp(bootcfg_info.command[choice], "prompt")) {
    125 			printf("type \"?\" or \"help\" for help.\n");
    126 			bootmenu(); /* does not return */
    127 		} else {
    128 			ic = bootcfg_info.command[choice];
    129 			/* Split command string at ; into separate commands */
    130 			do {
    131 				oc = input;
    132 				/* Look for ; separator */
    133 				for (; *ic && *ic != COMMAND_SEPARATOR; ic++)
    134 					*oc++ = *ic;
    135 				if (*input == '\0')
    136 					continue;
    137 				/* Strip out any trailing spaces */
    138 				oc--;
    139 				for (; *oc == ' ' && oc > input; oc--);
    140 				*++oc = '\0';
    141 				if (*ic == COMMAND_SEPARATOR)
    142 					ic++;
    143 				/* Stop silly command strings like ;;; */
    144 				if (*input != '\0')
    145 					docommand(input);
    146 				/* Skip leading spaces */
    147 				for (; *ic == ' '; ic++);
    148 			} while (*ic);
    149 		}
    150 	}
    151 }
    152