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[/] [eco32/] [trunk/] [disk/] [tools/] [mkpart/] [mkpart.c] - Blame information for rev 128

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Line No. Rev Author Line
1 17 hellwig 
/*
2 
 * mkpart.c -- make partitions on a disk
3 
 */
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5 
 
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdarg.h>
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#define SECTOR_SIZE     512
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#define NPE             (SECTOR_SIZE / sizeof(PartEntry))
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#define DESCR_SIZE      20
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#define LINE_SIZE       100
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unsigned char buf[32 * SECTOR_SIZE];
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typedef struct {
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  unsigned long type;
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  unsigned long start;
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  unsigned long size;
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  char descr[DESCR_SIZE];
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} PartEntry;
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PartEntry ptr[NPE];
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/**************************************************************/
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34 
 
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void error(char *fmt, ...) {
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  va_list ap;
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  va_start(ap, fmt);
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  printf("Error: ");
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  vprintf(fmt, ap);
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  printf("\n");
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  va_end(ap);
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  exit(1);
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}
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46 
 
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/**************************************************************/
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49 
 
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void convertNumber(unsigned char *p, unsigned long val) {
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  *(p + 0) = val >> 24;
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  *(p + 1) = val >> 16;
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  *(p + 2) = val >>  8;
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  *(p + 3) = val >>  0;
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}
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void convertPartitionTable(PartEntry *e, int n) {
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  int i;
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  unsigned char *p;
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  for (i = 0; i < n; i++) {
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    p = (unsigned char *) &e[i];
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    convertNumber(p + 0, e[i].type);
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    convertNumber(p + 4, e[i].start);
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    convertNumber(p + 8, e[i].size);
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  }
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}
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/**************************************************************/
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int parseNumber(char **pc, unsigned long *pi) {
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  char *p;
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  unsigned int base, dval;
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  unsigned long n;
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  p = *pc;
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  while (*p == ' ' || *p == '\t') {
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    p++;
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  }
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  if (*p == '\0' || *p == '\n') {
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    printf("Error: number is missing!\n");
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    return 0;
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  }
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  base = 10;
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  if (*p == '0') {
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    p++;
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    if (*p != '\0' && *p != '\n') {
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      if (*p == 'x' || *p == 'X') {
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        base = 16;
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        p++;
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      } else {
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        base = 8;
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      }
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    }
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  }
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  n = 0;
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  while ((*p >= '0' && *p <= '9') ||
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         (*p >= 'a' && *p <= 'f') ||
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         (*p >= 'A' && *p <= 'F')) {
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    if (*p >= '0' && *p <= '9') {
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      dval = (*p - '0');
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    } else
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    if (*p >= 'a' && *p <= 'f') {
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      dval = (*p - 'a' + 10);
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    } else
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    if (*p >= 'A' && *p <= 'F') {
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      dval = (*p - 'A' + 10);
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    }
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    if (dval >= base) {
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      printf("Error: digit value %d is illegal in number base %d\n",
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             dval, base);
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      return 0;
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    }
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    n *= base;
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    n += dval;
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    p++;
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  }
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  while (*p == ' ' || *p == '\t') {
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    p++;
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  }
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  *pc = p;
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  *pi = n;
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  return 1;
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}
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129 
 
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int parseString(char **pc, char *dst) {
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  char *p;
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133 
  p = *pc;
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  while (*p == ' ' || *p == '\t') {
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    p++;
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  }
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  if (*p != '\"') {
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    return 0;
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  }
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  p++;
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  while (*p != '\"' && *p != '\0' && *p != '\n') {
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    *dst++ = *p++;
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  }
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  if (*p != '\"') {
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    return 0;
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  }
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  p++;
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  while (*p == ' ' || *p == '\t') {
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    p++;
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  }
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  *pc = p;
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  *dst = '\0';
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  return 1;
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}
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156 
 
157 
/**************************************************************/
158 
 
159 
 
160 
int main(int argc, char *argv[]) {
161 
  char *diskName;
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  char *confName;
163 
  FILE *disk;
164 
  FILE *conf;
165 
  unsigned long diskSize;
166 
  unsigned long numSectors;
167 
  char line[LINE_SIZE];
168 
  char *p, *q;
169 
  int lineNumber;
170 
  FILE *mbootblk;
171 
  long mbootblkSize;
172 
  int i;
173 
  unsigned long partNum;
174 
  unsigned long bootable;
175 
  unsigned long partType;
176 
  unsigned long partStart;
177 
  unsigned long partLast;
178 
  unsigned long partSize;
179 
  char descr[LINE_SIZE];
180 
 
181 
  /* check command line arguments */
182 
  if (argc != 3) {
183 
    printf("Usage: %s <disk image file> <configuration file>\n", argv[0]);
184 
    exit(1);
185 
  }
186 
  diskName = argv[1];
187 
  confName = argv[2];
188 
  /* determine disk size */
189 
  disk = fopen(diskName, "rb");
190 
  if (disk == NULL) {
191 
    error("cannot open disk image '%s'", diskName);
192 
  }
193 
  fseek(disk, 0, SEEK_END);
194 
  diskSize = ftell(disk);
195 
  numSectors = diskSize / SECTOR_SIZE;
196 
  fclose(disk);
197 
  printf("Disk '%s' has %lu (0x%lX) sectors.\n",
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         diskName, numSectors, numSectors);
199 
  if (numSectors < 32) {
200 
    error("disk is too small");
201 
  }
202 
  if (diskSize % SECTOR_SIZE != 0) {
203 
    printf("Warning: disk size is not a multiple of sector size!\n");
204 
  }
205 
  /* create partition table */
206 
  conf = fopen(confName, "rt");
207 
  if (conf == NULL) {
208 
    error("cannot open configuration file '%s'", confName);
209 
  }
210 
  lineNumber = 0;
211 
  /* first, handle master boot block specification */
212 
  while (fgets(line, LINE_SIZE, conf) != NULL) {
213 
    lineNumber++;
214 
    p = line;
215 
    while (*p == ' ' || *p == '\t') {
216 
      p++;
217 
    }
218 
    if (*p == '\0' || *p == '\n' || *p == '#') {
219 
      continue;
220 
    }
221 
    q = p;
222 
    while (*q > 0x20 && *q < 0x7F) {
223 
      q++;
224 
    }
225 
    *q = '\0';
226 
    if (strcmp(p, "-noboot-") == 0) {
227 
      /* master boot block not wanted */
228 
    } else {
229 
      /* p points to name of master boot block file */
230 
      mbootblk = fopen(p, "rb");
231 
      if (mbootblk == NULL) {
232 
        error("cannot open master boot block file '%s'", p);
233 
      }
234 
      fseek(mbootblk, 0, SEEK_END);
235 
      mbootblkSize = ftell(mbootblk);
236 
      fseek(mbootblk, 0, SEEK_SET);
237 
      if (mbootblkSize > 32 * SECTOR_SIZE) {
238 
        error("master boot block file '%s' is bigger than 32 sectors", p);
239 
      }
240 
      for (i = 0; i < 32 * SECTOR_SIZE; i++) {
241 
        buf[i] = '\0';
242 
      }
243 
      if (fread(buf, 1, mbootblkSize, mbootblk) != mbootblkSize) {
244 
        error("cannot read master boot block file '%s'", p);
245 
      }
246 
      fclose(mbootblk);
247 
      disk = fopen(diskName, "r+b");
248 
      if (disk == NULL) {
249 
        error("cannot open disk image '%s'", diskName);
250 
      }
251 
      if (fwrite(buf, 1, 32 * SECTOR_SIZE, disk) != 32 * SECTOR_SIZE) {
252 
        error("cannot write master boot block to disk image '%s'", diskName);
253 
      }
254 
      fclose(disk);
255 
    }
256 
    break;
257 
  }
258 
  /* then, handle partition table entries */
259 
  while (fgets(line, LINE_SIZE, conf) != NULL) {
260 
    lineNumber++;
261 
    p = line;
262 
    while (*p == ' ' || *p == '\t') {
263 
      p++;
264 
    }
265 
    if (*p == '\0' || *p == '\n' || *p == '#') {
266 
      continue;
267 
    }
268 
    if (!parseNumber(&p, &partNum)) {
269 
      error("cannot read partition number in config file '%s', line %d",
270 
            confName, lineNumber);
271 
    }
272 
    if (partNum >= 16) {
273 
      error("illegal partition number in config file '%s', line %d",
274 
            confName, lineNumber);
275 
    }
276 
    if (*p == '*') {
277 
      p++;
278 
      bootable = 0x80000000;
279 
    } else {
280 
      bootable = 0x00000000;
281 
    }
282 
    if (!parseNumber(&p, &partType)) {
283 
      error("cannot read partition type in config file '%s', line %d",
284 
            confName, lineNumber);
285 
    }
286 
    if ((partType & 0x80000000) != 0) {
287 
      error("illegal partition type in config file '%s', line %d",
288 
            confName, lineNumber);
289 
    }
290 
    if (!parseNumber(&p, &partStart)) {
291 
      error("cannot read start sector in config file '%s', line %d",
292 
            confName, lineNumber);
293 
    }
294 
    if (partStart < 32 || partStart >= numSectors) {
295 
      error("illegal start sector in config file '%s', line %d",
296 
            confName, lineNumber);
297 
    }
298 
    if (!parseNumber(&p, &partLast)) {
299 
      error("cannot read last sector in config file '%s', line %d",
300 
            confName, lineNumber);
301 
    }
302 
    if (partLast < partStart || partLast >= numSectors) {
303 
      error("illegal last sector in config file '%s', line %d",
304 
            confName, lineNumber);
305 
    }
306 
    partSize = partLast - partStart + 1;
307 
    if (!parseString(&p, descr)) {
308 
      error("cannot read description in config file '%s', line %d",
309 
            confName, lineNumber);
310 
    }
311 
    if (strlen(descr) >= DESCR_SIZE) {
312 
      error("description too long in config file '%s', line %d",
313 
            confName, lineNumber);
314 
    }
315 
    if (partType != 0) {
316 
      ptr[partNum].type = bootable | partType;
317 
      ptr[partNum].start = partStart;
318 
      ptr[partNum].size = partSize;
319 
      memset(ptr[partNum].descr, 0, DESCR_SIZE);
320 
      strcpy(ptr[partNum].descr, descr);
321 
    } else {
322 
      ptr[partNum].type = 0;
323 
      ptr[partNum].start = 0;
324 
      ptr[partNum].size = 0;
325 
      memset(ptr[partNum].descr, 0, DESCR_SIZE);
326 
    }
327 
  }
328 
  fclose(conf);
329 
  /* next, show partition table */
330 
  printf("Partitions:\n");
331 
  printf(" # b type       start      last       size       description\n");
332 
  for (partNum = 0; partNum < NPE; partNum++) {
333 
    if (ptr[partNum].type != 0) {
334 
      partLast = ptr[partNum].start + ptr[partNum].size - 1;
335 
    } else {
336 
      partLast = 0;
337 
    }
338 
    printf("%2lu %s 0x%08lX 0x%08lX 0x%08lX 0x%08lX %s\n",
339 
           partNum,
340 
           ptr[partNum].type & 0x80000000 ? "*" : " ",
341 
           ptr[partNum].type & 0x7FFFFFFF,
342 
           ptr[partNum].start,
343 
           partLast,
344 
           ptr[partNum].size,
345 
           ptr[partNum].descr);
346 
  }
347 
  /* finally, write partition table record */
348 
  convertPartitionTable(ptr, NPE);
349 
  disk = fopen(diskName, "r+b");
350 
  if (disk == NULL) {
351 
    error("cannot open disk image '%s'", diskName);
352 
  }
353 
  fseek(disk, 1 * SECTOR_SIZE, SEEK_SET);
354 
  if (fwrite(ptr, 1, SECTOR_SIZE, disk) != SECTOR_SIZE) {
355 
    error("cannot write partition table to disk image '%s'", diskName);
356 
  }
357 
  fclose(disk);
358 
  /* done */
359 
  return 0;
360 
}

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