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- /* 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);
- }
- }
- 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(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(path,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;
- }
- 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(fixed));
- *(unsigned char *) fixed = DELETED_FLAG;
- break;
- case fdt_undelete:
- *fixed = *(*this)->name;
- printf("Undeleting %s\n",file_name(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(this->name));
- free(this);
- this = next;
- }
- }
- void file_unused(void)
- {
- report_unused(fp_root);
- }
- /* Local Variables: */
- /* tab-width: 8 */
- /* End: */
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