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1 /* file.c - Additional file attributes */
2
3 /* Written 1993 by Werner Almesberger */
4
5 /* FAT32, VFAT, Atari format support, and various fixes additions May 1998
6 * by Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de> */
7
8
9 #include <stdlib.h>
10 #include <stdio.h>
11 #include <string.h>
12 #include <ctype.h>
13 #include <unistd.h>
14
15 #define _LINUX_STAT_H /* hack to avoid inclusion of <linux/stat.h> */
16 #define _LINUX_STRING_H_ /* hack to avoid inclusion of <linux/string.h>*/
17 #define _LINUX_FS_H /* hack to avoid inclusion of <linux/fs.h> */
18
19 #include <linux/version.h>
20 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0)
21 # define __KERNEL__
22 # include <asm/types.h>
23 # undef __KERNEL__
24 #endif
25
26 #include <linux/msdos_fs.h>
27
28 #include "common.h"
29 #include "file.h"
30
31
32 FDSC *fp_root = NULL;
33
34
35 static void put_char(char **p,unsigned char c)
36 {
37 if ((c >= ' ' && c < 0x7f) || c >= 0xa0) *(*p)++ = c;
38 else {
39 *(*p)++ = '\\';
40 *(*p)++ = '0'+(c >> 6);
41 *(*p)++ = '0'+((c >> 3) & 7);
42 *(*p)++ = '0'+(c & 7);
43 }
44 }
45
46
47 char *file_name(unsigned char *fixed)
48 {
49 static char path[MSDOS_NAME*4+2];
50 char *p;
51 int i,j;
52
53 p = path;
54 for (i = j = 0; i < 8; i++)
55 if (fixed[i] != ' ') {
56 while (j++ < i) *p++ = ' ';
57 put_char(&p,fixed[i]);
58 }
59 if (strncmp(fixed+8," ",3)) {
60 *p++ = '.';
61 for (i = j = 0; i < 3; i++)
62 if (fixed[i+8] != ' ') {
63 while (j++ < i) *p++ = ' ';
64 put_char(&p,fixed[i+8]);
65 }
66 }
67 *p = 0;
68 return path;
69 }
70
71
72 int file_cvt(unsigned char *name,unsigned char *fixed)
73 {
74 unsigned char c;
75 int size,ext,cnt;
76
77 size = 8;
78 ext = 0;
79 while (*name) {
80 c = *name;
81 if (c < ' ' || c > 0x7e || strchr("*?<>|\"/",c)) {
82 printf("Invalid character in name. Use \\ooo for special "
83 "characters.\n");
84 return 0;
85 }
86 if (c == '.') {
87 if (ext) {
88 printf("Duplicate dots in name.\n");
89 return 0;
90 }
91 while (size--) *fixed++ = ' ';
92 size = 3;
93 ext = 1;
94 name++;
95 continue;
96 }
97 if (c == '\\') {
98 c = 0;
99 for (cnt = 3; cnt; cnt--) {
100 if (*name < '0' || *name > '7') {
101 printf("Invalid octal character.\n");
102 return 0;
103 }
104 c = c*8+*name++-'0';
105 }
106 if (cnt < 4) {
107 printf("Expected three octal digits.\n");
108 return 0;
109 }
110 name += 3;
111 }
112 if (islower(c)) c = toupper(c);
113 if (size) {
114 *fixed++ = c;
115 size--;
116 }
117 name++;
118 }
119 if (*name || size == 8) return 0;
120 if (!ext) {
121 while (size--) *fixed++ = ' ';
122 size = 3;
123 }
124 while (size--) *fixed++ = ' ';
125 return 1;
126 }
127
128
129 void file_add(char *path,FD_TYPE type)
130 {
131 FDSC **current,*walk;
132 char name[MSDOS_NAME];
133 char *here;
134
135 current = &fp_root;
136 if (*path != '/') die("%s: Absolute path required.",path);
137 path++;
138 while (1) {
139 if ((here = strchr(path,'/'))) *here = 0;
140 if (!file_cvt(path,name)) exit(2);
141 for (walk = *current; walk; walk = walk->next)
142 if (!here && (!strncmp(name,walk->name,MSDOS_NAME) || (type ==
143 fdt_undelete && !strncmp(name+1,walk->name+1,MSDOS_NAME-1))))
144 die("Ambiguous name: \"%s\"",path);
145 else if (here && !strncmp(name,walk->name,MSDOS_NAME)) break;
146 if (!walk) {
147 walk = alloc(sizeof(FDSC));
148 strncpy(walk->name,name,MSDOS_NAME);
149 walk->type = here ? fdt_none : type;
150 walk->first = NULL;
151 walk->next = *current;
152 *current = walk;
153 }
154 current = &walk->first;
155 if (!here) break;
156 *here = '/';
157 path = here+1;
158 }
159 }
160
161
162 FDSC **file_cd(FDSC **curr,char *fixed)
163 {
164 FDSC **walk;
165
166 if (!curr || !*curr) return NULL;
167 for (walk = curr; *walk; walk = &(*walk)->next)
168 if (!strncmp((*walk)->name,fixed,MSDOS_NAME) && (*walk)->first)
169 return &(*walk)->first;
170 return NULL;
171 }
172
173
174 static FDSC **file_find(FDSC **dir,char *fixed)
175 {
176 if (!dir || !*dir) return NULL;
177 if (*(unsigned char *) fixed == DELETED_FLAG) {
178 while (*dir) {
179 if (!strncmp((*dir)->name+1,fixed+1,MSDOS_NAME-1) && !(*dir)->first)
180 return dir;
181 dir = &(*dir)->next;
182 }
183 return NULL;
184 }
185 while (*dir) {
186 if (!strncmp((*dir)->name,fixed,MSDOS_NAME) && !(*dir)->first)
187 return dir;
188 dir = &(*dir)->next;
189 }
190 return NULL;
191 }
192
193
194 FD_TYPE file_type(FDSC **curr,char *fixed)
195 {
196 FDSC **this;
197
198 if ((this = file_find(curr,fixed))) return (*this)->type;
199 return fdt_none;
200 }
201
202
203 void file_modify(FDSC **curr,char *fixed)
204 {
205 FDSC **this,*next;
206
207 if (!(this = file_find(curr,fixed)))
208 die("Internal error: file_find failed");
209 switch ((*this)->type) {
210 case fdt_drop:
211 printf("Dropping %s\n",file_name(fixed));
212 *(unsigned char *) fixed = DELETED_FLAG;
213 break;
214 case fdt_undelete:
215 *fixed = *(*this)->name;
216 printf("Undeleting %s\n",file_name(fixed));
217 break;
218 default:
219 die("Internal error: file_modify");
220 }
221 next = (*this)->next;
222 free(*this);
223 *this = next;
224 }
225
226
227 static void report_unused(FDSC *this)
228 {
229 FDSC *next;
230
231 while (this) {
232 next = this->next;
233 if (this->first) report_unused(this->first);
234 else if (this->type != fdt_none)
235 printf("Warning: did not %s file %s\n",this->type == fdt_drop ?
236 "drop" : "undelete",file_name(this->name));
237 free(this);
238 this = next;
239 }
240 }
241
242
243 void file_unused(void)
244 {
245 report_unused(fp_root);
246 }
247
248 /* Local Variables: */
249 /* tab-width: 8 */
250 /* End: */