FreeCalypso > hg > freecalypso-tools

annotate rvinterf/etmsync/fspath.c @ 854:74331b35b1da

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ringtools/examples/ring.pwt: PWT equivalent of ring.buz
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 09 Nov 2021 16:39:52 +0000
parents e7502631a0f9
children
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1 /*
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2 * FFS pathname manipulation functions
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3 */
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4
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5 #include <sys/types.h>
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6 #include <stdio.h>
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7 #include <stdlib.h>
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8 #include <string.h>
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9 #include <strings.h>
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10 #include "ffs.h"
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11 #include "limits.h"
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12 #include "ffslimits.h"
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13 #include "exitcodes.h"
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14
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15 validate_ffs_pathname(cand)
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16 char *cand;
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17 {
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18 char *cp;
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19 int depth, c;
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20
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21 cp = cand;
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22 if (*cp++ != '/') {
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23 fprintf(stderr, "error: FFS pathnames must be absolute\n");
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24 return(-1);
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25 }
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26 for (depth = 0; *cp; depth++) {
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27 if (*cp == '/') {
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28 fprintf(stderr,
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29 "error: FFS pathname must not contain duplicate slashes\n");
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30 return(-1);
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31 }
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32 for (c = 0; *cp && *cp != '/'; cp++)
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33 c++;
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34 if (c > MAX_FN_COMPONENT) {
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35 fprintf(stderr,
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36 "error: FFS pathname component is too long\n");
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37 return(-1);
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38 }
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39 if (!*cp)
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40 continue;
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41 cp++;
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42 if (!*cp) {
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43 fprintf(stderr,
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44 "error: FFS pathname must not end with a trailing slash\n");
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45 return(-1);
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46 }
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47 }
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48 if (depth > MAX_NAME_DEPTH) {
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49 fprintf(stderr, "error: FFS pathname exceeds depth limit\n");
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50 return(-1);
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51 }
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52 return(depth);
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53 }
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54
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55 char *
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56 pathname_for_ffs_child(parent, childbuf)
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57 char *parent, *childbuf;
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58 {
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59 int depth;
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60 char *cp;
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61
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62 depth = validate_ffs_pathname(parent);
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63 if (depth < 0 || depth >= MAX_NAME_DEPTH)
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64 return(0);
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65 strcpy(childbuf, parent);
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66 cp = index(childbuf, '\0');
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67 if (depth)
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68 *cp++ = '/';
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69 return(cp);
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70 }