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mcopy.c
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/******************************************************************************
* @file mcopy.c
*****************************************************************************/
#include <ctype.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifndef __PDOS__
# if defined (_WIN32)
# include <windows.h>
# include <winioctl.h>
# elif defined (__GNUC__)
# include <sys/ioctl.h>
# include <termios.h>
# include <unistd.h>
# if defined (__CYGWIN__)
# include <sys/socket.h>
# endif
# endif
#endif
#include "common.h"
#include "mcopy.h"
#include "msdos.h"
#include "report.h"
#include "write7x.h"
#ifndef PATH_MAX
# define PATH_MAX 2048
#endif
static FILE *ofp;
struct dir_info {
unsigned int current_cluster;
unsigned char current_sector;
unsigned char current_entry;
unsigned char *scratch;
unsigned char flags;
};
struct file_info {
unsigned char dir_offset;
unsigned int dir_sector;
unsigned char *scratch;
unsigned int filelen;
unsigned int cluster;
unsigned int pointer;
unsigned long bytes;
};
static struct mcopy_state *state = 0;
static const char *program_name = 0;
static struct msdos_boot_sector bs;
static int size_fat = 0;
static unsigned int cluster_count = 0;
static unsigned int data_area = 0;
static unsigned int info_sector = 0;
static unsigned int number_of_fats = 0;
static unsigned int reserved_sectors = 0;
static unsigned int root_cluster = 0;
static unsigned int root_dir = 0;
static unsigned int root_entries = 0;
static unsigned int sectors_per_cluster = 0;
static unsigned int sectors_per_fat = 0;
static unsigned int total_sectors = 0;
struct option {
const char *name;
int index, flags;
};
#define OPTION_NO_ARG 0x0001
#define OPTION_HAS_ARG 0x0002
enum options {
OPTION_IGNORED = 1,
OPTION_HELP,
OPTION_INPUT,
OPTION_OFFSET,
OPTION_STATUS
};
static struct option opts[] = {
{ "i", OPTION_INPUT, OPTION_HAS_ARG },
{ "-help", OPTION_HELP, OPTION_NO_ARG },
{ "-offset", OPTION_OFFSET, OPTION_HAS_ARG },
{ "-status", OPTION_STATUS, OPTION_NO_ARG },
{ 0, 0, 0 }
};
static int strstart (const char *val, const char **str) {
const char *p = val;
const char *q = *str;
while (*p != '\0') {
if (*p != *q) {
return 0;
}
++p;
++q;
}
*str = q;
return 1;
}
static void print_help (int exitval) {
if (!program_name) {
goto _exit;
}
fprintf (stderr, "Usage: %s [options] [::]source-file [::]target-file\n\n", program_name);
fprintf (stderr, "Options:\n\n");
fprintf (stderr, " Short options:\n\n");
fprintf (stderr, " -i Specify the input target.\n");
fprintf (stderr, "\n");
fprintf (stderr, " Long options:\n\n");
fprintf (stderr, " --help Show this help information then exit.\n");
fprintf (stderr, " --offset SECTOR Write the filesystem starting at SECTOR.\n");
_exit:
exit (exitval);
}
static void *xmalloc (size_t size) {
void *ptr = malloc (size);
if (ptr == NULL && size) {
report_at (program_name, 0, REPORT_ERROR, "memory full (malloc)");
exit (EXIT_FAILURE);
}
memset (ptr, 0, size);
return ptr;
}
static void *xrealloc (void *ptr, size_t size) {
void *new_ptr = realloc (ptr, size);
if (new_ptr == NULL && size) {
report_at (program_name, 0, REPORT_ERROR, "memory full (realloc)");
exit (EXIT_FAILURE);
}
return new_ptr;
}
static char *xstrdup (const char *str) {
char *ptr = xmalloc (strlen (str) + 1);
strcpy (ptr, str);
return ptr;
}
static void dynarray_add (void *ptab, size_t *nb_ptr, void *data) {
int nb, nb_alloc;
void **pp;
nb = *nb_ptr;
pp = *(void ***) ptab;
if ((nb & (nb - 1)) == 0) {
if (!nb) {
nb_alloc = 1;
} else {
nb_alloc = nb * 2;
}
pp = xrealloc (pp, nb_alloc * sizeof (void *));
*(void ***) ptab = pp;
}
pp[nb++] = data;
*nb_ptr = nb;
}
static void parse_args (int *pargc, char ***pargv, int optind) {
char **argv = *pargv;
int argc = *pargc;
struct option *popt;
const char *optarg, *r;
if (argc == optind) {
print_help (EXIT_SUCCESS);
}
while (optind < argc) {
r = argv[optind++];
if (r[0] != '-' || r[1] == '\0') {
dynarray_add (&state->files, &state->nb_files, xstrdup (r));
continue;
}
for (popt = opts; popt; ++popt) {
const char *p1 = popt->name;
const char *r1 = (r + 1);
if (!p1) {
report_at (program_name, 0, REPORT_ERROR, "invalid option -- '%s'", r);
exit (EXIT_FAILURE);
}
if (!strstart (p1, &r1)) {
continue;
}
optarg = r1;
if (popt->flags & OPTION_HAS_ARG) {
if (*optarg == '\0') {
if (optind >= argc) {
report_at (program_name, 0, REPORT_ERROR, "argument to '%s' is missing", r);
exit (EXIT_FAILURE);
}
optarg = argv[optind++];
}
} else if (*optarg != '\0') {
continue;
}
break;
}
switch (popt->index) {
case OPTION_HELP: {
print_help (EXIT_SUCCESS);
break;
}
case OPTION_INPUT: {
if (state->outfile) {
report_at (program_name, 0, REPORT_ERROR, "multiple output files provided");
exit (EXIT_FAILURE);
}
state->outfile = xstrdup (optarg);
break;
}
case OPTION_OFFSET: {
long conversion;
char *temp;
errno = 0;
conversion = strtol (optarg, &temp, 0);
if (!*optarg || isspace ((int) *optarg) || errno || *temp) {
report_at (program_name, 0, REPORT_ERROR, "bad number for offset (%s)", optarg);
exit (EXIT_FAILURE);
}
if (conversion < 0 || (unsigned long) conversion > UINT_MAX) {
report_at (program_name, 0, REPORT_ERROR, "offset must be between 0 and %u", UINT_MAX);
exit (EXIT_FAILURE);
}
state->offset = (unsigned long) conversion;
break;
}
case OPTION_STATUS: {
state->status = 1;
break;
}
default: {
report_at (program_name, 0, REPORT_ERROR, "unsupported option '%s'", r);
exit (EXIT_FAILURE);
}
}
}
}
#ifndef __PDOS__
/** Get a single character from the terminal. */
static char getch () {
#if defined(_WIN32) && !defined (__PDOS__)
KEY_EVENT_RECORD keyevent;
INPUT_RECORD irec;
DWORD events;
for (;;) {
ReadConsoleInput (GetStdHandle (STD_INPUT_HANDLE), &irec, 1, &events);
if (irec.EventType == KEY_EVENT && ((KEY_EVENT_RECORD) irec.Event.KeyEvent).bKeyDown) {
const int ca = (int) keyevent.uChar.AsciiChar;
const int cv = (int) keyevent.wVirtualKeyCode;
const int key = ca == 0 ? -cv : ca + (ca > 0 ? 0 : 256);
keyevent = (KEY_EVENT_RECORD) irec.Event.KeyEvent;
switch (key) {
case -16: continue; /* disable Shift */
case -17: continue; /* disable Ctrl / AltGr */
case -18: continue; /* disable Alt / AltGr */
case -220: continue; /* disable first detection of "^" key (not "^" symbol) */
case -221: continue; /* disable first detection of "'" key (not "'" symbol) */
case -191: continue; /* disable AltGr + "#" */
case -52: continue; /* disable AltGr + "4" */
case -53: continue; /* disable AltGr + "5" */
case -54: continue; /* disable AltGr + "6" */
case -12: continue; /* disable num block 5 with num lock deactivated */
case 13: return 10; /* enter */
case -46: return 127; /* delete */
case -49: return 251; /* ¹ */
case 0: continue;
case 1: continue; /* disable Ctrl + a (selects all text) */
case 2: continue; /* disable Ctrl + b */
case 3: continue; /* disable Ctrl + c (terminates program) */
case 4: continue; /* disable Ctrl + d */
case 5: continue; /* disable Ctrl + e */
case 6: continue; /* disable Ctrl + f (opens search) */
case 7: continue; /* disable Ctrl + g */
case 10: continue; /* disable Ctrl + j */
case 11: continue; /* disable Ctrl + k */
case 12: continue; /* disable Ctrl + l */
case 14: continue; /* disable Ctrl + n */
case 15: continue; /* disable Ctrl + o */
case 16: continue; /* disable Ctrl + p */
case 17: continue; /* disable Ctrl + q */
case 18: continue; /* disable Ctrl + r */
case 19: continue; /* disable Ctrl + s */
case 20: continue; /* disable Ctrl + t */
case 21: continue; /* disable Ctrl + u */
case 22: continue; /* disable Ctrl + v (inserts clipboard) */
case 23: continue; /* disable Ctrl + w */
case 24: continue; /* disable Ctrl + x */
case 25: continue; /* disable Ctrl + y */
case 26: continue; /* disable Ctrl + z */
default: return key; /* any other ASCII/virtual character */
}
}
}
#else
int key;
#if defined (__PDOS__)
setvbuf (stdin, NULL, _IONBF, 0);
for (;;) {
#else
struct termios term;
int nbbytes;
tcgetattr (0, &term);
for (;;) {
term.c_lflag &= ~(ICANON | ECHO); /* turn off line buffering and echoing */
tcsetattr (0, TCSANOW, &term);
ioctl (0, FIONREAD, &nbbytes); /* 0 is STDIN */
while (!nbbytes) {
sleep (1);
fflush (stdout);
ioctl (0, FIONREAD, &nbbytes); /* 0 is STDIN */
}
#endif
key = (int) getchar ();
if (key == 27 || key == 194 || key == 195) { /* escape, 194/195 is escape for °ß´äöüÄÖÜ */
key = (int) getchar ();
if (key == 91) { /* [ following escape */
key = (int) getchar (); /* get code of next char after \e[ */
if (key == 49) { /* F5-F8 */
key = 62 + (int) getchar (); /* 53, 55-57 */
if (key == 115) {
key++; /* F5 code is too low by 1 */
}
getchar (); /* take in following ~ (126), but discard code */
} else if (key == 50) { /* insert or F9-F12 */
key = (int) getchar ();
if (key == 126) { /* insert */
key = 45;
} else { /* F9-F12 */
key += 71; /* 48, 49, 51, 52 */
if (key < 121) {
key++; /* F11 and F12 are too low by 1 */
}
getchar (); /* take in following ~ (126), but discard code */
}
} else if (key == 51 || key == 53 || key == 54) { /* delete, page up/down */
getchar (); /* take in following ~ (126), but discard code */
}
} else if (key == 79) { /* F1-F4 */
key = 32 + (int) getchar (); /* 80-83 */
}
key = -key; /* use negative numbers for escaped keys */
}
#if defined (__PDOS__)
setvbuf (stdin, NULL, _IOLBF, 0);
#else
term.c_lflag |= (ICANON | ECHO); /* turn on line buffering and echoing */
tcsetattr (0, TCSANOW, &term);
#endif
switch (key) {
case 127: return (char) 8; /* backspace */
case -27: return (char) 27; /* escape */
case -51: return (char) 127; /* delete */
case -164: return (char) 132; /* ä */
case -182: return (char) 148; /* ö */
case -188: return (char) 129; /* ü */
case -132: return (char) 142; /* Ä */
case -150: return (char) 153; /* Ö */
case -156: return (char) 154; /* Ü */
case -159: return (char) 225; /* ß */
case -181: return (char) 230; /* µ */
case -167: return (char) 245; /* § */
case -176: return (char) 248; /* ° */
case -178: return (char) 253; /* ² */
case -179: return (char) 252; /* ³ */
case -180: return (char) 239; /* ´ */
case -65: return (char) -38; /* up arrow */
case -66: return (char) -40; /* down arrow */
case -68: return (char) -37; /* left arrow */
case -67: return (char) -39; /* right arrow */
case -53: return (char) -33; /* page up */
case -54: return (char) -34; /* page down */
case -72: return (char) -36; /* pos1 */
case -70: return (char) -35; /* end */
case 0: continue;
case 1: continue; /* disable Ctrl + a */
case 2: continue; /* disable Ctrl + b */
case 3: continue; /* disable Ctrl + c (terminates program) */
case 4: continue; /* disable Ctrl + d */
case 5: continue; /* disable Ctrl + e */
case 6: continue; /* disable Ctrl + f */
case 7: continue; /* disable Ctrl + g */
case 8: continue; /* disable Ctrl + h */
case 11: continue; /* disable Ctrl + k */
case 12: continue; /* disable Ctrl + l */
case 13: continue; /* disable Ctrl + m */
case 14: continue; /* disable Ctrl + n */
case 15: continue; /* disable Ctrl + o */
case 16: continue; /* disable Ctrl + p */
case 17: continue; /* disable Ctrl + q */
case 18: continue; /* disable Ctrl + r */
case 19: continue; /* disable Ctrl + s */
case 20: continue; /* disable Ctrl + t */
case 21: continue; /* disable Ctrl + u */
case 22: continue; /* disable Ctrl + v */
case 23: continue; /* disable Ctrl + w */
case 24: continue; /* disable Ctrl + x */
case 25: continue; /* disable Ctrl + y */
case 26: continue; /* disable Ctrl + z (terminates program) */
default: return key; /* any other ASCII character */
}
}
#endif
}
#endif
static int check_overwrite (const char *fn) {
#if defined (__PDOS__)
report_at (NULL, 0, REPORT_WARNING, "overwriting %s", fn);
return 1;
#else
char ch;
printf ("File %s already exists.\n", fn);
printf ("o)verwrite s)skip (os): ");
while ((ch = tolower (getch ())) < 0) {}
if (isspace (ch)) {
printf ("\n");
} else {
printf ("%c\n", ch);
}
if (ch == 'o') {
return 1;
} else if (ch == 's') {
return 0;
}
return check_overwrite (fn);
#endif
}
static int seekto (long offset) {
return fseek (ofp, (state->offset * 512) + offset, SEEK_SET);
}
static int get_next_entry (struct dir_info *di, struct msdos_dirent *de);
static int open_dir (const char *target, struct dir_info *di);
static unsigned int get_fat_entry (unsigned char *scratch, unsigned int cluster);
static int set_fat_entry (unsigned char *scratch, unsigned int cluster, unsigned int value);
static unsigned int get_free_fat (unsigned char *scratch);
static int canonical_to_dir (char *dest, const char *src) {
static const char invalid_chars[] = "\"*+,./:;<=>?[\\]|";
int i, j;
int namelen = 0, dots = 0, extlen = 0;
memset (dest, ' ', 11);
if (*src == '\0' || *src == '.') {
return -1;
}
for (j = i = 0; *src != '\0'; i++) {
int c = (unsigned char) *src++;
if (c == '/' || c == '\\') {
break;
}
if (i >= 12) {
return -1;
}
if (i == 0 && c == 0xE5) {
/**
* 0xE5 in the first character of the name is a marker for delected files,
* it needs to be translated to 0x05.
*/
c = 0x05;
} else if (c == '.') {
if (dots++) {
return -1;
}
j = 8;
continue;
}
if (c <= 0x20 || strchr (invalid_chars, c)) {
return -1;
}
if (dots) {
if (++extlen > 3) {
return -1;
}
} else {
if (++namelen > 8) {
return -1;
}
}
if (c >= 'a' && c <= 'z') {
c -= 'a' - 'A';
}
dest[j++] = c;
}
return 0;
}
static int copy_file (const char *source, struct file_info *fi, const char *fname) {
struct msdos_dirent de;
struct fat32_fsinfo *info;
unsigned int free_clusters;
unsigned int next_cluster;
FILE *ifp;
long bytes;
unsigned char *buffer, *temp;
unsigned int i, j, sector;
unsigned int clust_size = sectors_per_cluster * 512;
unsigned int start_cluster = 0, prev_cluster = 0, size = 0;
unsigned long flen, copied = 0;
unsigned int num_clusters = 0, *cluster_chain;
if ((ifp = fopen (source, "rb")) == NULL) {
return -1;
}
fseek (ifp, 0, SEEK_END);
if ((flen = ftell (ifp)) > UINT_MAX) {
fclose (ifp);
return -1;
}
if (!(cluster_chain = malloc (cluster_count * sizeof (unsigned int)))) {
fclose (ifp);
return -1;
}
num_clusters = (flen + clust_size - 1) / clust_size;
memset (cluster_chain, 0, cluster_count * sizeof (unsigned int));
for (i = 2, j = 0; i < cluster_count && j < num_clusters; i++) {
if (get_fat_entry (fi->scratch, i) == 0) {
cluster_chain[j++] = i;
}
}
if (j < num_clusters) {
report_at (program_name, 0, REPORT_ERROR, "Not enough free space available");
free (cluster_chain);
fclose (ifp);
return -1;
}
fseek (ifp, 0, SEEK_SET);
if (!(buffer = (unsigned char *) malloc (clust_size))) {
free (cluster_chain);
fclose (ifp);
return -1;
}
memset (buffer, 0, clust_size);
j = 0;
while ((bytes = fread (buffer, 1, clust_size, ifp)) > 0) {
size += bytes;
i = cluster_chain[j++];
if (i == cluster_count) {
free (cluster_chain);
free (buffer);
fclose (ifp);
return -1;
}
if (start_cluster == 0) {
start_cluster = i;
if (seekto ((unsigned long) fi->dir_sector * 512) || fread (fi->scratch, 512, 1, ofp) != 1) {
free (cluster_chain);
free (buffer);
fclose (ifp);
return -1;
}
de = (((struct msdos_dirent *) fi->scratch)[fi->dir_offset]);
write721_to_byte_array (de.startlo, start_cluster);
write721_to_byte_array (de.starthi, start_cluster >> 16);
memcpy (&(((struct msdos_dirent *) fi->scratch)[fi->dir_offset]), &de, sizeof (de));
if (seekto ((unsigned long) fi->dir_sector * 512) || fwrite (fi->scratch, 512, 1, ofp) != 1) {
free (cluster_chain);
free (buffer);
fclose (ifp);
return -1;
}
} else {
if (prev_cluster == 0) {
free (cluster_chain);
free (buffer);
fclose (ifp);
return -1;
}
if (set_fat_entry (fi->scratch, prev_cluster, i) < 0) {
free (cluster_chain);
free (buffer);
fclose (ifp);
return -1;
}
}
sector = data_area + ((i - 2) * sectors_per_cluster);
if (seekto ((unsigned long) sector * 512)) {
free (cluster_chain);
free (buffer);
fclose (ifp);
return -1;
}
temp = buffer;
while (bytes > 0) {
if (fwrite (temp, 512, 1, ofp) != 1) {
free (cluster_chain);
free (buffer);
fclose (ifp);
return -1;
}
if (bytes > 512) {
copied += 512;
} else {
copied += bytes;
}
if (state->status) {
double percent = (double) copied / (double) flen;
printf ("\rcopied %lu bytes (%.2f%%) to %s", copied, percent * 100, fname);
}
bytes -= 512;
temp += 512;
}
memset (buffer, 0, clust_size);
if (set_fat_entry (fi->scratch, i, 0x0FFFFFF8) < 0) {
free (cluster_chain);
free (buffer);
fclose (ifp);
return -1;
}
prev_cluster = i;
if (feof (ifp)) { break; }
}
free (cluster_chain);
free (buffer);
fclose (ifp);
if (seekto ((unsigned long) fi->dir_sector * 512) || fread (fi->scratch, 512, 1, ofp) != 1) {
return -1;
}
if (size_fat == 32) {
if (seekto ((unsigned long) info_sector * 512) || fread (fi->scratch, 512, 1, ofp) != 1) {
return -1;
}
info = (struct fat32_fsinfo *) (fi->scratch + 0x1e0);
free_clusters = (unsigned int) info->free_clusters[0] | (((unsigned int) info->free_clusters[1]) << 8) | (((unsigned int) info->free_clusters[2]) << 16) | (((unsigned int) info->free_clusters[3]) << 24);
next_cluster = (unsigned int) info->next_cluster[0] | (((unsigned int) info->next_cluster[1]) << 8) | (((unsigned int) info->next_cluster[2]) << 16) | (((unsigned int) info->next_cluster[3]) << 24);
free_clusters -= num_clusters;
next_cluster += num_clusters;
write741_to_byte_array (info->free_clusters, free_clusters);
write741_to_byte_array (info->next_cluster, next_cluster);
if (seekto ((unsigned long) info_sector * 512) || fwrite (fi->scratch, 512, 1, ofp) != 1) {
return -1;
}
}
if (seekto ((unsigned long) fi->dir_sector * 512) || fread (fi->scratch, 512, 1, ofp) != 1) {
return -1;
}
de = (((struct msdos_dirent *) fi->scratch)[fi->dir_offset]);
write741_to_byte_array (de.size, size);
memcpy (&(((struct msdos_dirent *) fi->scratch)[fi->dir_offset]), &de, sizeof (de));
if (seekto ((unsigned long) fi->dir_sector * 512) || fwrite (fi->scratch, 512, 1, ofp) != 1) {
return -1;
}
return 0;
}
static int get_free_dirent (const char *path, struct dir_info *di, struct msdos_dirent *de) {
int entry;
unsigned int i, tempclust;
if (open_dir (path, di) < 0) {
return -1;
}
entry = 0;
di->flags |= 0x01;
do {
entry = get_next_entry (di, de);
/*if (entry == 0 && (!de->name[0] || de->name[0] == 0xE5 || (de->attr & ATTR_LONG_NAME) == ATTR_LONG_NAME)) {*/
if (entry == 0 && (!de->name[0] || de->name[0] == 0xE5)) {
/*if (de->name[0] == 0xE5 || (de->attr & ATTR_LONG_NAME) == ATTR_LONG_NAME) {*/
if (de->name[0] == 0xE5) {
di->current_entry--;
}
return 0;
} else if (entry == -1) {
return -1;
} else if (entry == 1) {
if ((tempclust = get_free_fat (di->scratch) == 0x0FFFFFF7)) {
return -1;
}
memset (di->scratch, 0, 512);
for (i = 0; i < sectors_per_cluster; i++) {
unsigned long offset = (unsigned long) (data_area + ((tempclust - 2) * sectors_per_cluster) + i);