1: #include <stdio.h>
   2: #include <time.h>
   3: #include <ctype.h>
   4: #include "msdos.h"
   5: 
   6: extern int fd, dir_dirty, clus_size, dir_entries;
   7: extern long dir_chain[MAX_DIR_SECS];
   8: extern unsigned char *dir_buf;
   9: 
  10: /*
  11:  * Write a directory entry.  A simple cache is used instead of something
  12:  * more elaborate.
  13:  */
  14: 
  15: void
  16: dir_write(num, dir)
  17: int num;
  18: struct directory *dir;
  19: {
  20:     unsigned char *offset;
  21:     char *memcpy();
  22: 
  23:     offset = dir_buf + (num * MDIR_SIZE);
  24:     memcpy((char *) offset, (char *) dir, MDIR_SIZE);
  25:     dir_dirty = 1;
  26:     return;
  27: }
  28: 
  29: /*
  30:  * Write a partially filled directory buffer to disk.  Resets dir_dirty to
  31:  * zero.
  32:  */
  33: 
  34: void
  35: dir_flush()
  36: {
  37:     int i, length;
  38:     unsigned char *offset;
  39:     void disk_write();
  40: 
  41:     if (fd < 0 || !dir_dirty)
  42:         return;
  43: 
  44:     length = dir_entries / 16;
  45:     for (i = 0; i < length; i++) {
  46:         offset = dir_buf + (i * MSECTOR_SIZE);
  47:         disk_write(dir_chain[i], offset, MSECTOR_SIZE);
  48:     }
  49:     dir_dirty = 0;
  50:     return;
  51: }
  52: 
  53: /*
  54:  * Convert a Unix filename to a legal MSDOS name.  Returns a pointer to
  55:  * a static area.  Will truncate file and extension names, will
  56:  * substitute the letter 'X' for any illegal character in the name.
  57:  */
  58: 
  59: unsigned char *
  60: dos_name(filename, verbose)
  61: char *filename;
  62: int verbose;
  63: {
  64:     static char *dev[9] = {"CON", "AUX", "COM1", "COM2", "PRN", "LPT1",
  65:     "LPT2", "LPT3", "NUL"};
  66:     char *s, buf[MAX_PATH], *name, *ext, *strcpy(), *strpbrk(), *strrchr();
  67:     static unsigned char ans[13];
  68:     int dot, modified, len;
  69:     register int i;
  70: 
  71:     strcpy(buf, filename);
  72:     name = buf;
  73:                     /* skip drive letter */
  74:     if (buf[0] && buf[1] == ':')
  75:         name = &buf[2];
  76:                     /* zap the leading path */
  77:     if (s = strrchr(name, '/'))
  78:         name = s + 1;
  79:     if (s = strrchr(name, '\\'))
  80:         name = s + 1;
  81: 
  82:     ext = "";
  83:     dot = 0;
  84:     len = strlen(name);
  85:     for (i = 0; i < len; i++) {
  86:         s = name + len -i -1;
  87:         if (*s == '.' && !dot) {
  88:             dot = 1;
  89:             *s = '\0';
  90:             ext = s +1;
  91:         }
  92:         if (islower(*s))
  93:             *s = toupper(*s);
  94:     }
  95:     if (*name == '\0') {
  96:         name = "X";
  97:         if (verbose)
  98:             printf("\"%s\" Null name component, using \"%s.%s\"\n", filename, name, ext);
  99:     }
 100:     for (i = 0; i < 9; i++) {
 101:         if (!strcmp(name, dev[i])) {
 102:             *name = 'X';
 103:             if (verbose)
 104:                 printf("\"%s\" Is a device name, using \"%s.%s\"\n", filename, name, ext);
 105:         }
 106:     }
 107:     if (strlen(name) > 8) {
 108:         *(name + 8) = '\0';
 109:         if (verbose)
 110:             printf("\"%s\" Name too long, using, \"%s.%s\"\n", filename, name, ext);
 111:     }
 112:     if (strlen(ext) > 3) {
 113:         *(ext + 3) = '\0';
 114:         if (verbose)
 115:             printf("\"%s\" Extension too long, using \"%s.%s\"\n", filename, name, ext);
 116:     }
 117:     modified = 0;
 118:     while (s = strpbrk(name, "^+=/[]:',?*\\<>|\". ")) {
 119:         modified++;
 120:         *s = 'X';
 121:     }
 122:     while (s = strpbrk(ext, "^+=/[]:',?*\\<>|\". ")) {
 123:         modified++;
 124:         *s = 'X';
 125:     }
 126:     if (modified && verbose)
 127:         printf("\"%s\" Contains illegal character(s), using \"%s.%s\"\n", filename, name, ext);
 128: 
 129:     sprintf((char *) ans, "%-8.8s%-3.3s", name, ext);
 130:     return(ans);
 131: }
 132: 
 133: /*
 134:  * Make a directory entry.  Builds a directory entry based on the
 135:  * name, attribute, starting cluster number, and size.  Returns a pointer
 136:  * to a static directory structure.
 137:  */
 138: 
 139: struct directory *
 140: mk_entry(filename, attr, fat, size, date)
 141: unsigned char *filename;
 142: unsigned char attr;
 143: unsigned int fat;
 144: long size, date;
 145: {
 146:     int i;
 147:     char *strncpy();
 148:     static struct directory ndir;
 149:     struct tm *now, *localtime();
 150:     unsigned char hour, min_hi, min_low, sec;
 151:     unsigned char year, month_hi, month_low, day;
 152: 
 153:     now = localtime(&date);
 154:     strncpy((char *) ndir.name, (char *) filename, 8);
 155:     strncpy((char *) ndir.ext, (char *) filename + 8, 3);
 156:     ndir.attr = attr;
 157:     for (i = 0; i < 10; i++)
 158:         ndir.reserved[i] = '\0';
 159:     hour = now->tm_hour << 3;
 160:     min_hi = now->tm_min >> 3;
 161:     min_low = now->tm_min << 5;
 162:     sec = now->tm_sec / 2;
 163:     ndir.time[1] = hour + min_hi;
 164:     ndir.time[0] = min_low + sec;
 165:     year = (now->tm_year - 80) << 1;
 166:     month_hi = (now->tm_mon + 1) >> 3;
 167:     month_low = (now->tm_mon + 1) << 5;
 168:     day = now->tm_mday;
 169:     ndir.date[1] = year + month_hi;
 170:     ndir.date[0] = month_low + day;
 171:     ndir.start[1] = fat / 0x100;
 172:     ndir.start[0] = fat % 0x100;
 173:     ndir.size[3] = size / 0x1000000L;
 174:     ndir.size[2] = (size % 0x1000000L) / 0x10000L;
 175:     ndir.size[1] = ((size % 0x1000000L) % 0x10000L) / 0x100;
 176:     ndir.size[0] = ((size % 0x1000000L) % 0x10000L) % 0x100;
 177:     return(&ndir);
 178: }
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