302 lines
8.0 KiB
C
302 lines
8.0 KiB
C
/*
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* misc/bximage.c
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* $Id: bximage.c,v 1.9 2002-08-29 14:07:17 bdenney Exp $
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*
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* Create empty hard disk or floppy disk images for bochs.
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <assert.h>
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#include "config.h"
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char *EOF_ERR = "ERROR: End of input";
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char *rcsid = "$Id: bximage.c,v 1.9 2002-08-29 14:07:17 bdenney Exp $";
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char *divider = "========================================================================";
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/* menu data for choosing floppy/hard disk */
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char *fdhd_menu = "\nDo you want to create a floppy disk image or a hard disk image?\nPlease type hd or fd. [hd] ";
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char *fdhd_choices[] = { "fd", "hd" };
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int fdhd_n_choices = 2;
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/* menu data for choosing floppy size */
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char *fdsize_menu = "\nChoose the size of floppy disk image to create, in megabytes.\nPlease type 0.36, 0.72, 1.2, 1.44, or 2.88. [1.44] ";
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char *fdsize_choices[] = { "0.36","0.72","1.2","1.44","2.88" };
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int fdsize_n_choices = 5;
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/* stolen from main.cc */
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void bx_center_print (FILE *file, char *line, int maxwidth)
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{
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int imax;
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int i;
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imax = (maxwidth - strlen(line)) >> 1;
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for (i=0; i<imax; i++) fputc (' ', file);
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fputs (line, file);
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}
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void
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print_banner ()
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{
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printf ("%s\n", divider);
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bx_center_print (stdout, "bximage\n", 72);
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bx_center_print (stdout, "Disk Image Creation Tool for Bochs\n", 72);
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bx_center_print (stdout, rcsid, 72);
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printf ("\n%s\n", divider);
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}
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/* this is how we crash */
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void fatal (char *c)
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{
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printf ("%s\n", c);
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exit (1);
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}
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/* remove leading spaces, newline junk at end. returns pointer to
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cleaned string, which is between s0 and the null */
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char *
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clean_string (char *s0)
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{
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char *s = s0;
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char *ptr;
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/* find first nonblank */
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while (isspace (*s))
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s++;
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/* truncate string at first non-alphanumeric */
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ptr = s;
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while (isprint (*ptr))
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ptr++;
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*ptr = 0;
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return s;
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}
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/* returns 0 on success, -1 on failure. The value goes into out. */
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int
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ask_int (char *prompt, int min, int max, int the_default, int *out)
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{
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int n = max + 1;
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char buffer[1024];
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char *clean;
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int illegal;
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while (1) {
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printf ("%s", prompt);
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if (!fgets (buffer, sizeof(buffer), stdin))
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return -1;
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clean = clean_string (buffer);
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if (strlen(clean) < 1) {
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// empty line, use the default
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*out = the_default;
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return 0;
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}
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illegal = (1 != sscanf (buffer, "%d", &n));
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if (illegal || n<min || n>max) {
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printf ("Your choice (%s) was not an integer between %d and %d.\n\n",
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clean, min, max);
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} else {
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// choice is okay
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*out = n;
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return 0;
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}
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}
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}
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int
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ask_menu (char *prompt, int n_choices, char *choice[], int the_default, int *out)
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{
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char buffer[1024];
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char *clean;
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int i;
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*out = -1;
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while (1) {
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printf ("%s", prompt);
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if (!fgets (buffer, sizeof(buffer), stdin))
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return -1;
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clean = clean_string (buffer);
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if (strlen(clean) < 1) {
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// empty line, use the default
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*out = the_default;
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return 0;
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}
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for (i=0; i<n_choices; i++) {
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if (!strcmp (choice[i], clean)) {
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// matched, return the choice number
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*out = i;
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return 0;
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}
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}
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printf ("Your choice (%s) did not match any of the choices:\n", clean);
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for (i=0; i<n_choices; i++) {
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if (i>0) printf (", ");
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printf ("%s", choice[i]);
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}
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printf ("\n");
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}
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}
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int
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ask_yn (char *prompt, int the_default, int *out)
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{
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char buffer[16];
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char *clean;
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*out = -1;
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while (1) {
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printf ("%s", prompt);
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if (!fgets (buffer, sizeof(buffer), stdin))
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return -1;
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clean = clean_string (buffer);
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if (strlen(clean) < 1) {
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// empty line, use the default
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*out = the_default;
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return 0;
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}
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switch (tolower(clean[0])) {
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case 'y': *out=1; return 0;
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case 'n': *out=0; return 0;
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}
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printf ("Please type either yes or no.\n");
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}
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}
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int
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ask_string (char *prompt, char *the_default, char *out)
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{
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char buffer[1024];
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char *clean;
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out[0] = 0;
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printf ("%s", prompt);
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if (!fgets (buffer, sizeof(buffer), stdin))
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return -1;
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clean = clean_string (buffer);
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if (strlen(clean) < 1) {
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// empty line, use the default
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strcpy (out, the_default);
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return 0;
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}
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strcpy (out, clean);
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return 0;
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}
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/* produce the image file */
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int make_image (int sec, char *filename)
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{
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FILE *fp;
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char buffer[1024];
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int i;
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unsigned int n;
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// check if it exists before trashing someone's disk image
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fp = fopen (filename, "r");
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if (fp) {
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int confirm;
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sprintf (buffer, "\nThe disk image '%s' already exists. Are you sure you want to replace it?\nPlease type yes or no. [no] ", filename);
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if (ask_yn (buffer, 0, &confirm) < 0)
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fatal (EOF_ERR);
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if (!confirm)
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fatal ("ERROR: Aborted");
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fclose (fp);
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}
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// okay, now open it for writing
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fp = fopen (filename, "w");
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if (fp == NULL) {
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// attempt to print an error
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#ifdef HAVE_PERROR
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sprintf (buffer, "while opening '%s' for writing", filename);
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perror (buffer);
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#endif
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fatal ("ERROR: Could not write disk image");
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}
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printf ("\nWriting: [");
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/*
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* seek to sec*512-1 and write a single character.
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* can't just do: fseek(fp, 512*sec-1, SEEK_SET)
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* because 512*sec may be too large for signed int.
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*/
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while (sec > 0)
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{
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/* temp <-- min(sec, 4194303)
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* 4194303 is (int)(0x7FFFFFFF/512)
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*/
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int temp = ((sec < 4194303) ? sec : 4194303);
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fseek(fp, 512*temp, SEEK_CUR);
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sec -= temp;
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}
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fseek(fp, -1, SEEK_CUR);
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if (fputc('\0', fp) == EOF)
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{
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fclose (fp);
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fatal ("ERROR: The disk image is not complete!");
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}
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printf ("] Done.\n");
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fclose (fp);
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return 0;
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}
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int main()
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{
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int hd;
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int sectors = 0;
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char filename[256];
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char bochsrc_line[256];
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print_banner ();
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filename[0] = 0;
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if (ask_menu (fdhd_menu, fdhd_n_choices, fdhd_choices, 1, &hd) < 0)
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fatal (EOF_ERR);
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if (hd) {
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int hdsize, cyl, heads=16, spt=63;
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if (ask_int ("\nEnter the hard disk size in megabytes, between 1 and 32255\n[10] ", 1, 32255, 10, &hdsize) < 0)
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fatal (EOF_ERR);
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cyl = (int) (hdsize*1024.0*1024.0/16.0/63.0/512.0);
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assert (cyl < 65536);
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sectors = cyl*heads*spt;
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printf ("\nI will create a hard disk image with\n");
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printf (" cyl=%d\n", cyl);
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printf (" heads=%d\n", heads);
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printf (" sectors per track=%d\n", spt);
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printf (" total sectors=%d\n", sectors);
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printf (" total size=%.2f megabytes\n", (float)sectors*512.0/1024.0/1024.0);
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if (ask_string ("\nWhat should I name the image?\n[c.img] ", "c.img", filename) < 0)
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fatal (EOF_ERR);
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sprintf (bochsrc_line, "diskc: file=\"%s\", cyl=%d, heads=%d, spt=%d", filename, cyl, heads, spt);
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} else {
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int fdsize, cyl=0, heads=0, spt=0;
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char *name = NULL;
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if (ask_menu (fdsize_menu, fdsize_n_choices, fdsize_choices, 3, &fdsize) < 0)
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fatal (EOF_ERR);
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switch (fdsize) {
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case 0: name="360k"; cyl=40; heads=2; spt=9; break; /* 0.36 meg */
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case 1: name="720k"; cyl=80; heads=2; spt=9; break; /* 0.72 meg */
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case 2: name="1_2"; cyl=80; heads=2; spt=15; break; /* 1.2 meg */
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case 3: name="1_44"; cyl=80; heads=2; spt=18; break; /* 1.44 meg */
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case 4: name="2_88"; cyl=80; heads=2; spt=36; break; /* 2.88 meg */
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default:
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fatal ("ERROR: fdsize out of range");
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}
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sectors = cyl*heads*spt;
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printf ("I will create a floppy image with\n");
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printf (" cyl=%d\n", cyl);
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printf (" heads=%d\n", heads);
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printf (" sectors per track=%d\n", spt);
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printf (" total sectors=%d\n", sectors);
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printf (" total bytes=%d\n", sectors*512);
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if (ask_string ("\nWhat should I name the image?\n[a.img] ", "a.img", filename) < 0)
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fatal (EOF_ERR);
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sprintf (bochsrc_line, "floppya: %s=\"%s\", status=inserted", name, filename);
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}
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if (sectors < 1)
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fatal ("ERROR: Illegal disk size!");
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if (strlen (filename) < 1)
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fatal ("ERROR: Illegal filename");
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make_image (sectors, filename);
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printf ("\nI wrote %d bytes to %s.\n", sectors*512, filename);
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printf ("\nThe following line should appear in your bochsrc:\n");
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printf (" %s\n", bochsrc_line);
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return 0;
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}
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