rosapps/sysutils/dosfsck/file.c

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