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Full Discussion: "exec" with "read"
Top Forums UNIX for Advanced & Expert Users "exec" with "read" Post 302863545 by wisecracker on Monday 14th of October 2013 02:24:16 PM
Old 10-14-2013
OK a few tests, OSX 10.7.5, default bash terminal:-

The first block is MadeInGermany's, the last three characters should be newlines not NULLs.
Second is alister's and only allows KB input much akin to INKEY$ on this tool.
Third is mine unchanged from the original post, last three characters correct.
Lastly a real hexdump command showing the last three characters.

Alister, the original code I found did include LANG=C but I removed it. Thanks for the info...

The test binary code is attached as a "txt" file...
Code:
Last login: Mon Oct 14 18:32:36 on ttys000
AMIGA:barrywalker~> ./hex_dump3.sh /tmp/bin.dat
 20  00  20  09  00  20  00  00  01  02  03  04  05  06  07  08  09  00  0B  0C 
 0D  0E  0F  10  11  12  13  14  15  16  17  18  19  1A  1B  1C  1D  1E  1F  20 
 21  22  23  24  25  26  27  28  29  2A  2B  2C  2D  2E  2F  30  31  32  33  34 
 35  36  37  38  39  3A  3B  3C  3D  3E  3F  40  41  42  43  44  45  46  47  48 
 49  4A  4B  4C  4D  4E  4F  50  51  52  53  54  55  56  57  58  59  5A  5B  5C 
 5D  5E  5F  60  61  62  63  64  65  66  67  68  69  6A  6B  6C  6D  6E  6F  70 
 71  72  73  74  75  76  77  78  79  7A  7B  7C  7D  7E  7F  80  81  82  83  84 
 85  86  87  88  89  8A  8B  8C  8D  8E  8F  90  91  92  93  94  95  96  97  98 
 99  9A  9B  9C  9D  9E  9F  A0  A1  A2  A3  A4  A5  A6  A7  A8  A9  AA  AB  AC 
 AD  AE  AF  B0  B1  B2  B3  B4  B5  B6  B7  B8  B9  BA  BB  BC  BD  BE  BF  C0 
 C1  C2  C3  C4  C5  C6  C7  C8  C9  CA  CB  CC  CD  CE  CF  D0  D1  D2  D3  D4 
 D5  D6  D7  D8  D9  DA  DB  DC  DD  DE  DF  E0  E1  E2  E3  E4  E5  E6  E7  E8 
 E9  EA  EB  EC  ED  EE  EF  F0  F1  F2  F3  F4  F5  F6  F7  F8  F9  FA  FB  FC 
 FD  FE  FF  00  00  00 
AMIGA:barrywalker~> ./hex_dump4.sh /tmp/bin.dat
71
77
65
72
74
79
75
69
6F
70

AMIGA:barrywalker~> ./hex_dump5.sh /tmp/bin.dat
 20  0A  20  09  0A  20  0A  00  01  02  03  04  05  06  07  08  09  0A  0B  0C 
 0D  0E  0F  10  11  12  13  14  15  16  17  18  19  1A  1B  1C  1D  1E  1F  20 
 21  22  23  24  25  26  27  28  29  2A  2B  2C  2D  2E  2F  30  31  32  33  34 
 35  36  37  38  39  3A  3B  3C  3D  3E  3F  40  41  42  43  44  45  46  47  48 
 49  4A  4B  4C  4D  4E  4F  50  51  52  53  54  55  56  57  58  59  5A  5B  5C 
 5D  5E  5F  60  61  62  63  64  65  66  67  68  69  6A  6B  6C  6D  6E  6F  70 
 71  72  73  74  75  76  77  78  79  7A  7B  7C  7D  7E  7F  80  81  82  83  84 
 85  86  87  88  89  8A  8B  8C  8D  8E  8F  90  91  92  93  94  95  96  97  98 
 99  9A  9B  9C  9D  9E  9F  A0  A1  A2  A3  A4  A5  A6  A7  A8  A9  AA  AB  AC 
 AD  AE  AF  B0  B1  B2  B3  B4  B5  B6  B7  B8  B9  BA  BB  BC  BD  BE  BF  C0 
 C1  C2  C3  C4  C5  C6  C7  C8  C9  CA  CB  CC  CD  CE  CF  D0  D1  D2  D3  D4 
 D5  D6  D7  D8  D9  DA  DB  DC  DD  DE  DF  E0  E1  E2  E3  E4  E5  E6  E7  E8 
 E9  EA  EB  EC  ED  EE  EF  F0  F1  F2  F3  F4  F5  F6  F7  F8  F9  FA  FB  FC 
 FD  FE  FF  0A  0A  0A 
AMIGA:barrywalker~> hexdump -C /tmp/bin.dat
00000000  20 0a 20 09 0a 20 0a 00  01 02 03 04 05 06 07 08  | . .. ..........|
00000010  09 0a 0b 0c 0d 0e 0f 10  11 12 13 14 15 16 17 18  |................|
00000020  19 1a 1b 1c 1d 1e 1f 20  21 22 23 24 25 26 27 28  |....... !"#$%&'(|
00000030  29 2a 2b 2c 2d 2e 2f 30  31 32 33 34 35 36 37 38  |)*+,-./012345678|
00000040  39 3a 3b 3c 3d 3e 3f 40  41 42 43 44 45 46 47 48  |9:;<=>?@ABCDEFGH|
00000050  49 4a 4b 4c 4d 4e 4f 50  51 52 53 54 55 56 57 58  |IJKLMNOPQRSTUVWX|
00000060  59 5a 5b 5c 5d 5e 5f 60  61 62 63 64 65 66 67 68  |YZ[\]^_`abcdefgh|
00000070  69 6a 6b 6c 6d 6e 6f 70  71 72 73 74 75 76 77 78  |ijklmnopqrstuvwx|
00000080  79 7a 7b 7c 7d 7e 7f 80  81 82 83 84 85 86 87 88  |yz{|}~..........|
00000090  89 8a 8b 8c 8d 8e 8f 90  91 92 93 94 95 96 97 98  |................|
000000a0  99 9a 9b 9c 9d 9e 9f a0  a1 a2 a3 a4 a5 a6 a7 a8  |................|
000000b0  a9 aa ab ac ad ae af b0  b1 b2 b3 b4 b5 b6 b7 b8  |................|
000000c0  b9 ba bb bc bd be bf c0  c1 c2 c3 c4 c5 c6 c7 c8  |................|
000000d0  c9 ca cb cc cd ce cf d0  d1 d2 d3 d4 d5 d6 d7 d8  |................|
000000e0  d9 da db dc dd de df e0  e1 e2 e3 e4 e5 e6 e7 e8  |................|
000000f0  e9 ea eb ec ed ee ef f0  f1 f2 f3 f4 f5 f6 f7 f8  |................|
00000100  f9 fa fb fc fd fe ff 0a  0a 0a                    |..........|
0000010a
AMIGA:barrywalker~>

EDIT:
I forgot to add that I want to use the bash builtins only and not rely on transient commands like od,
xxd or hexdump to get my required results purely as an exercise to learn more about the limitations
of bash, (or any shell for that matter), scripting... You guys are a godsend to people like me and
certainly have put me on the straight and narrow...

Thank to all...
bin.txt (266 Bytes) 
Last edited by wisecracker; 10-14-2013 at 03:34 PM..
 

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