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annotate pirollback/pathname.c @ 45:18472a2ccf55

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pirollback: pathname reconstruction implemented
author Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
date Sat, 06 Jul 2013 22:06:38 +0000
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45
18472a2ccf55 pirollback: pathname reconstruction implemented
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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1 #include <sys/types.h>
18472a2ccf55 pirollback: pathname reconstruction implemented
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2 #include <stdio.h>
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3 #include <stdlib.h>
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4 #include <string.h>
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5 #include <strings.h>
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6 #include "types.h"
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7 #include "struct.h"
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8 #include "pathname.h"
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9
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10 extern struct inode_info inode[];
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11
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12 pathname_of_inode(ino, pnbuf)
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13 char *pnbuf;
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14 {
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15 int level, revpath[MAX_DIR_NEST];
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16 struct inode_info *inf;
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17 char *op;
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18
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19 for (level = 0; ino != 1; ino = inode[ino].parent) {
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20 if (!inode[ino].parent)
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21 return(-1);
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22 if (level >= MAX_DIR_NEST)
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23 return(-1);
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24 revpath[level++] = ino;
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25 }
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26 op = pnbuf;
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27 *op++ = '/';
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28 while (level) {
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29 level--;
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30 inf = inode + revpath[level];
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31 switch (inf->type) {
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32 case 0xE1:
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33 case 0xF1:
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34 /* good only for the last component */
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35 if (!level)
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36 break;
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37 else
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38 return(-1);
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39 case 0xF2:
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40 /* good for all components */
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41 break;
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42 default:
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43 /* bad */
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44 return(-1);
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45 }
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46 strcpy(op, inf->dataptr);
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47 op += strlen(inf->dataptr);
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48 if (inf->type == 0xF2)
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49 *op++ = '/';
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50 }
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51 *op = '\0';
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52 return(0);
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53 }