FreeCalypso > hg > freecalypso-tools
annotate target-utils/libtiffs/init.c @ 407:19e5a3e2f9c0
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> |
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date | Sat, 11 Aug 2018 21:52:17 +0000 |
parents | c10a65f7563e |
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1 #include "types.h" |
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2 #include "struct.h" |
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3 #include "globals.h" |
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4 #include "macros.h" |
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5 |
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6 static const u8 ffs_sector_signature[6] = {'F', 'f', 's', '#', 0x10, 0x02}; |
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7 |
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8 static |
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9 find_indexblk() |
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10 { |
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11 u32 sector_addr; |
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12 u8 *sector_ptr; |
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13 int i; |
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14 |
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15 printf("Looking for TIFFS active index block\n"); |
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16 sector_addr = tiffs_base_addr; |
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17 for (i = 0; i < tiffs_nsectors; i++) { |
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18 sector_ptr = (u8 *) sector_addr; |
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19 if (!bcmp(sector_ptr, ffs_sector_signature, 6) && |
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20 sector_ptr[8] == 0xAB) { |
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21 printf("Found at %08X\n", sector_addr); |
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22 tiffs_active_index = (struct inode *) sector_ptr; |
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23 return(0); |
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24 } |
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25 sector_addr += tiffs_sector_size; |
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26 } |
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27 printf("Error: Not found in any of the %d candidate sectors\n", |
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28 tiffs_nsectors); |
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29 return(-1); |
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30 } |
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31 |
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32 static |
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33 find_rootino() |
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34 { |
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35 int ino; |
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36 struct inode *irec; |
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37 |
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38 printf("Looking for the root inode\n"); |
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39 for (ino = 1; ; ino++) { |
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40 if (ino >= tiffs_sector_size >> 4) { |
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41 printf("Error: Hit end of sector, no root inode found\n"); |
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42 return(-1); |
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43 } |
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44 irec = tiffs_active_index + ino; |
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45 if (irec->type == OBJTYPE_DIR && *inode_to_dataptr(irec) == '/') |
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46 break; |
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47 } |
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48 printf("Found at inode #%x\n", ino); |
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49 tiffs_root_ino = ino; |
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50 return(0); |
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51 } |
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52 |
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53 tiffs_init() |
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54 { |
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55 int stat; |
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56 |
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57 if (tiffs_init_done) |
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58 return(0); |
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59 stat = find_indexblk(); |
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60 if (stat < 0) |
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61 return(stat); |
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62 stat = find_rootino(); |
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63 if (stat < 0) |
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64 return(stat); |
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65 tiffs_init_done = 1; |
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66 return(0); |
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67 } |