FreeCalypso > hg > freecalypso-tools

annotate target-utils/libtiffs/findfile.c @ 407:19e5a3e2f9c0

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fcup-settime: moved time() retrieval a little closer to the output A fundamental problem with all simple time transfer tools is that there is always some delay between the time retrieval on the source system and that transmitted time being set on the destination, and the resulting time on the destination system is off by that delay amount. This delay cannot be fully eliminated when working in a simple environment like ours, but we should make our best effort to minimize it. In the present case, moving the atinterf_init() call before the time() retrieval should make a teensy-tiny improvement.
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 11 Aug 2018 21:52:17 +0000
parents 87cb03b35f77
children
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0
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 #include <sys/types.h>
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2 #include "types.h"
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3 #include "struct.h"
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4 #include "globals.h"
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5 #include "macros.h"
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6
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7 static u8 *
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Mychaela Falconia <falcon@freecalypso.org>
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8 find_endofchunk(ino)
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9 {
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10 struct inode *irec = tiffs_active_index + ino;
0
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11 u8 *p;
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12 int i;
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13
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14 p = inode_to_dataptr(irec) + irec->len;
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15 for (i = 0; i < 16; i++) {
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16 p--;
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17 if (!*p)
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18 return(p);
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19 if (*p != 0xFF)
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20 break;
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21 }
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22 printf("Error: inode #%x has no valid termination\n", ino);
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23 return(p); /* XXX */
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24 }
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25
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26 tiffs_find_file(pathname, startret, sizeret, continue_ret)
0
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27 char *pathname;
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28 u8 **startret;
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29 size_t *sizeret;
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30 int *continue_ret;
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31 {
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32 int ino, cont;
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33 struct inode *irec;
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34 u8 *start, *end;
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35 int size;
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36
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37 ino = tiffs_pathname_to_inode(pathname);
0
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38 if (ino <= 0)
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39 return(-1);
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40 irec = tiffs_active_index + ino;
0
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41 if (irec->type != OBJTYPE_FILE) {
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42 printf("Error: %s is not a regular file\n", pathname);
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43 return(-1);
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44 }
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45 start = inode_to_dataptr(irec);
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46 start += strlen(start) + 1;
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47 end = find_endofchunk(ino);
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48 size = end - start;
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49 if (size < 0)
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50 size = 0;
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51 cont = irec->descend;
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52 if (cont == 0xFFFF)
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53 cont = 0;
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54 if (startret)
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55 *startret = start;
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56 if (sizeret)
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57 *sizeret = size;
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58 if (continue_ret)
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59 *continue_ret = cont;
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60 return(0);
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61 }
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62
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63 tiffs_get_segment(ino, startret, sizeret, continue_ret)
0
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64 int ino;
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65 u8 **startret;
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66 size_t *sizeret;
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67 int *continue_ret;
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68 {
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69 int cont;
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70 struct inode *irec;
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71 u8 *start, *end;
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72 int size;
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73
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74 for (;;) {
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75 irec = tiffs_active_index + ino;
0
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76 if (irec->type)
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77 break;
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78 if (irec->sibling == 0xFFFF) {
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79 printf("Error: segment inode #%d: deleted and no sibling\n",
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80 ino);
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81 return(-1);
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82 }
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83 ino = irec->sibling;
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84 }
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85 if (irec->type != OBJTYPE_SEGMENT) {
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86 printf("Error: inode #%x is not a segment\n", ino);
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87 return(-1);
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88 }
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89 start = inode_to_dataptr(irec);
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90 end = find_endofchunk(ino);
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91 size = end - start;
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92 if (size <= 0) {
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93 printf("Error: segment inode #%x: bad length\n", ino);
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94 return(-1);
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95 }
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96 cont = irec->descend;
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97 if (cont == 0xFFFF)
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98 cont = 0;
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99 if (startret)
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100 *startret = start;
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101 if (sizeret)
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102 *sizeret = size;
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Mychaela Falconia <falcon@freecalypso.org>
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103 if (continue_ret)
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104 *continue_ret = cont;
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Mychaela Falconia <falcon@freecalypso.org>
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105 return(0);
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106 }