/* file.c - Additional file attributes
Copyright (C) 1993 Werner Almesberger <werner.almesberger@lrc.di.epfl.ch>
Copyright (C) 1998 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
On Debian systems, the complete text of the GNU General Public License
can be found in /usr/share/common-licenses/GPL-3 file.
*/
/* FAT32, VFAT, Atari format support, and various fixes additions May 1998
* by Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de> */
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <unistd.h>
#define _LINUX_STAT_H /* hack to avoid inclusion of <linux/stat.h> */
#define _LINUX_STRING_H_ /* hack to avoid inclusion of <linux/string.h> */
#define _LINUX_FS_H /* hack to avoid inclusion of <linux/fs.h> */
#include <asm/types.h>
#include <linux/msdos_fs.h>
#include "common.h"
#include "file.h"
FDSC *fp_root = NULL;
static void put_char(char **p, unsigned char c)
{
if ((c >= ' ' && c < 0x7f) || c >= 0xa0)
*(*p)++ = c;
else {
*(*p)++ = '\\';
*(*p)++ = '0' + (c >> 6);
*(*p)++ = '0' + ((c >> 3) & 7);
*(*p)++ = '0' + (c & 7);
}
}
/**
* Construct the "pretty-printed" representation of the name in a short directory entry.
*
* @param[in] fixed Pointer to name[0] of a DIR_ENT
*
* @return Pointer to static string containing pretty "8.3" equivalent of the
* name in the directory entry.
*/
char *file_name(unsigned char *fixed)
{
static char path[MSDOS_NAME * 4 + 2];
char *p;
int i, j;
p = path;
for (i = j = 0; i < 8; i++)
if (fixed[i] != ' ') {
while (j++ < i)
*p++ = ' ';
put_char(&p, fixed[i]);
}
if (strncmp((const char *)(fixed + 8), " ", 3)) {
*p++ = '.';
for (i = j = 0; i < 3; i++)
if (fixed[i + 8] != ' ') {
while (j++ < i)
*p++ = ' ';
put_char(&p, fixed[i + 8]);
}
}
*p = 0;
return path;
}
int file_cvt(unsigned char *name, unsigned char *fixed)
{
unsigned char c;
int size, ext, cnt;
size = 8;
ext = 0;
while (*name) {
c = *name;
if (c < ' ' || c > 0x7e || strchr("*?<>|\"/", c)) {
printf("Invalid character in name. Use \\ooo for special "
"characters.\n");
return 0;
}
if (c == '.') {
if (ext) {
printf("Duplicate dots in name.\n");
return 0;
}
while (size--)
*fixed++ = ' ';
size = 3;
ext = 1;
name++;
continue;
}
if (c == '\\') {
c = 0;
for (cnt = 3; cnt; cnt--) {
if (*name < '0' || *name > '7') {
printf("Invalid octal character.\n");
return 0;
}
c = c * 8 + *name++ - '0';
}
if (cnt < 4) {
printf("Expected three octal digits.\n");
return 0;
}
name += 3;
}
if (islower(c))
c = toupper(c);
if (size) {
*fixed++ = c;
size--;
}
name++;
}
if (*name || size == 8)
return 0;
if (!ext) {
while (size--)
*fixed++ = ' ';
size = 3;
}
while (size--)
*fixed++ = ' ';
return 1;
}
void file_add(char *path, FD_TYPE type)
{
FDSC **current, *walk;
char name[MSDOS_NAME];
char *here;
current = &fp_root;
if (*path != '/')
die("%s: Absolute path required.", path);
path++;
while (1) {
if ((here = strchr(path, '/')))
*here = 0;
if (!file_cvt((unsigned char *)path, (unsigned char *)name))
exit(2);
for (walk = *current; walk; walk = walk->next)
if (!here && (!strncmp(name, walk->name, MSDOS_NAME) || (type ==
fdt_undelete
&&
!strncmp
(name + 1,
walk->name
+ 1,
MSDOS_NAME
- 1))))
die("Ambiguous name: \"%s\"", path);
else if (here && !strncmp(name, walk->name, MSDOS_NAME))
break;
if (!walk) {
walk = alloc(sizeof(FDSC));
strncpy(walk->name, name, MSDOS_NAME);
walk->type = here ? fdt_none : type;
walk->first = NULL;
walk->next = *current;
*current = walk;
}
current = &walk->first;
if (!here)
break;
*here = '/';
path = here + 1;
}
}
FDSC **file_cd(FDSC ** curr, char *fixed)
{
FDSC **walk;
if (!curr || !*curr)
return NULL;
for (walk = curr; *walk; walk = &(*walk)->next)
if (!strncmp((*walk)->name, fixed, MSDOS_NAME) && (*walk)->first)
return &(*walk)->first;
return NULL;
}
static FDSC **file_find(FDSC ** dir, char *fixed)
{
if (!dir || !*dir)
return NULL;
if (*(unsigned char *)fixed == DELETED_FLAG) {
while (*dir) {
if (!strncmp((*dir)->name + 1, fixed + 1, MSDOS_NAME - 1)
&& !(*dir)->first)
return dir;
dir = &(*dir)->next;
}
return NULL;
}
while (*dir) {
if (!strncmp((*dir)->name, fixed, MSDOS_NAME) && !(*dir)->first)
return dir;
dir = &(*dir)->next;
}
return NULL;
}
/* Returns the attribute of the file FIXED in directory CURR or FDT_NONE if no
such file exists or if CURR is NULL. */
FD_TYPE file_type(FDSC ** curr, char *fixed)
{
FDSC **this;
if ((this = file_find(curr, fixed)))
return (*this)->type;
return fdt_none;
}
void file_modify(FDSC ** curr, char *fixed)
{
FDSC **this, *next;
if (!(this = file_find(curr, fixed)))
die("Internal error: file_find failed");
switch ((*this)->type) {
case fdt_drop:
printf("Dropping %s\n", file_name((unsigned char *)fixed));
*(unsigned char *)fixed = DELETED_FLAG;
break;
case fdt_undelete:
*fixed = *(*this)->name;
printf("Undeleting %s\n", file_name((unsigned char *)fixed));
break;
default:
die("Internal error: file_modify");
}
next = (*this)->next;
free(*this);
*this = next;
}
static void report_unused(FDSC * this)
{
FDSC *next;
while (this) {
next = this->next;
if (this->first)
report_unused(this->first);
else if (this->type != fdt_none)
printf("Warning: did not %s file %s\n", this->type == fdt_drop ?
"drop" : "undelete", file_name((unsigned char *)this->name));
free(this);
this = next;
}
}
void file_unused(void)
{
report_unused(fp_root);
}
