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23

5

On my machine I get the following output when I run these commands:

$ echo foos > myfile

$ hexdump myfile

6f66 736f 000a

The output from hexdump is little-endian. Does this mean that my machine is little-endian, or does hexdump always use little-endian format?

utilities bsd hexdump

share|improve this question

edited Aug 27 '14 at 17:10

jw013

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asked Nov 14 '12 at 23:48

Cory KleinCory Klein

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add a comment | 

23

5

On my machine I get the following output when I run these commands:

$ echo foos > myfile

$ hexdump myfile

6f66 736f 000a

The output from hexdump is little-endian. Does this mean that my machine is little-endian, or does hexdump always use little-endian format?

utilities bsd hexdump

share|improve this question

edited Aug 27 '14 at 17:10

jw013

38.4k77 gold badges107107 silver badges127127 bronze badges

asked Nov 14 '12 at 23:48

Cory KleinCory Klein

5,9722222 gold badges6262 silver badges8585 bronze badges

add a comment | 

On my machine I get the following output when I run these commands:

$ echo foos > myfile

$ hexdump myfile

6f66 736f 000a

The output from hexdump is little-endian. Does this mean that my machine is little-endian, or does hexdump always use little-endian format?

utilities bsd hexdump

share|improve this question

edited Aug 27 '14 at 17:10

jw013

38.4k77 gold badges107107 silver badges127127 bronze badges

asked Nov 14 '12 at 23:48

Cory KleinCory Klein

5,9722222 gold badges6262 silver badges8585 bronze badges

$ echo foos > myfile

$ hexdump myfile

6f66 736f 000a

share|improve this question

edited Aug 27 '14 at 17:10

jw013

38.4k77 gold badges107107 silver badges127127 bronze badges

asked Nov 14 '12 at 23:48

Cory KleinCory Klein

5,9722222 gold badges6262 silver badges8585 bronze badges

share|improve this question

edited Aug 27 '14 at 17:10

jw013

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asked Nov 14 '12 at 23:48

Cory KleinCory Klein

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edited Aug 27 '14 at 17:10

jw013

38.4k77 gold badges107107 silver badges127127 bronze badges

edited Aug 27 '14 at 17:10

jw013

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asked Nov 14 '12 at 23:48

Cory KleinCory Klein

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asked Nov 14 '12 at 23:48

Cory KleinCory Klein

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2 Answers
2

active

oldest

votes

30

The traditional BSD hexdump utility uses the platform's endianness, so the output you see means your machine is little-endian.

Use hexdump -C (or od -t x1) to get consistent byte-by-byte output irrespective of the platform's endianness.

share|improve this answer

edited 2 hours ago

Cory Klein

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answered Nov 14 '12 at 23:55

GillesGilles

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add a comment | 

5

From the manpage:

 -x      Two-byte hexadecimal display.  Display the input offset in hexa‐

         decimal, followed by eight, space separated, four column, zero-

         filled, two-byte quantities of input data, in hexadecimal, per

         line.

...

 If no format strings are specified, the default display is equivalent to

 specifying the -x option.

Your output is little-endian (least significant byte first), which is also the endianness of the x86 and x86_64 architectures, which you are probably using.

share|improve this answer

edited Jan 30 at 22:46

Cory Klein

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answered Nov 14 '12 at 23:54

Dennis KaarsemakerDennis Kaarsemaker

7,28311 gold badge2323 silver badges2626 bronze badges

• 
  
  
  

  
  3
  

  
  
  
  
  
  

  
  
  Is it just me, or does the man page not mention anywhere that it is treating the "two-byte quantities" as integers? I thought I was taking crazy pills...
  
  – slashingweapon
  Jun 14 '17 at 21:41
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @slashingweapon "two-byte quantity of input data" is uint16_t integer.
  
  – Ruslan
  May 8 '18 at 7:53
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  "Two bytes" is not the same as uint16_t on a little-endian system.
  
  – slashingweapon
  May 10 '18 at 16:43
  

  
  
  
  

add a comment | 

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30

The traditional BSD hexdump utility uses the platform's endianness, so the output you see means your machine is little-endian.

Use hexdump -C (or od -t x1) to get consistent byte-by-byte output irrespective of the platform's endianness.

share|improve this answer

edited 2 hours ago

Cory Klein

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answered Nov 14 '12 at 23:55

GillesGilles

571k138138 gold badges11801180 silver badges16921692 bronze badges

add a comment | 

30

The traditional BSD hexdump utility uses the platform's endianness, so the output you see means your machine is little-endian.

Use hexdump -C (or od -t x1) to get consistent byte-by-byte output irrespective of the platform's endianness.

share|improve this answer

edited 2 hours ago

Cory Klein

5,9722222 gold badges6262 silver badges8585 bronze badges

answered Nov 14 '12 at 23:55

GillesGilles

571k138138 gold badges11801180 silver badges16921692 bronze badges

add a comment | 

The traditional BSD hexdump utility uses the platform's endianness, so the output you see means your machine is little-endian.

Use hexdump -C (or od -t x1) to get consistent byte-by-byte output irrespective of the platform's endianness.

share|improve this answer

edited 2 hours ago

Cory Klein

5,9722222 gold badges6262 silver badges8585 bronze badges

answered Nov 14 '12 at 23:55

GillesGilles

571k138138 gold badges11801180 silver badges16921692 bronze badges

share|improve this answer

edited 2 hours ago

Cory Klein

5,9722222 gold badges6262 silver badges8585 bronze badges

answered Nov 14 '12 at 23:55

GillesGilles

571k138138 gold badges11801180 silver badges16921692 bronze badges

edited 2 hours ago

Cory Klein

5,9722222 gold badges6262 silver badges8585 bronze badges

edited 2 hours ago

Cory Klein

5,9722222 gold badges6262 silver badges8585 bronze badges

answered Nov 14 '12 at 23:55

GillesGilles

571k138138 gold badges11801180 silver badges16921692 bronze badges

answered Nov 14 '12 at 23:55

GillesGilles

571k138138 gold badges11801180 silver badges16921692 bronze badges

5

From the manpage:

 -x      Two-byte hexadecimal display.  Display the input offset in hexa‐

         decimal, followed by eight, space separated, four column, zero-

         filled, two-byte quantities of input data, in hexadecimal, per

         line.

...

 If no format strings are specified, the default display is equivalent to

 specifying the -x option.

Your output is little-endian (least significant byte first), which is also the endianness of the x86 and x86_64 architectures, which you are probably using.

share|improve this answer

edited Jan 30 at 22:46

Cory Klein

5,9722222 gold badges6262 silver badges8585 bronze badges

answered Nov 14 '12 at 23:54

Dennis KaarsemakerDennis Kaarsemaker

7,28311 gold badge2323 silver badges2626 bronze badges

• 
  
  
  

  
  3
  

  
  
  
  
  
  

  
  
  Is it just me, or does the man page not mention anywhere that it is treating the "two-byte quantities" as integers? I thought I was taking crazy pills...
  
  – slashingweapon
  Jun 14 '17 at 21:41
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @slashingweapon "two-byte quantity of input data" is uint16_t integer.
  
  – Ruslan
  May 8 '18 at 7:53
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  "Two bytes" is not the same as uint16_t on a little-endian system.
  
  – slashingweapon
  May 10 '18 at 16:43
  

  
  
  
  

add a comment | 

5

From the manpage:

 -x      Two-byte hexadecimal display.  Display the input offset in hexa‐

         decimal, followed by eight, space separated, four column, zero-

         filled, two-byte quantities of input data, in hexadecimal, per

         line.

...

 If no format strings are specified, the default display is equivalent to

 specifying the -x option.

Your output is little-endian (least significant byte first), which is also the endianness of the x86 and x86_64 architectures, which you are probably using.

share|improve this answer

edited Jan 30 at 22:46

Cory Klein

5,9722222 gold badges6262 silver badges8585 bronze badges

answered Nov 14 '12 at 23:54

Dennis KaarsemakerDennis Kaarsemaker

7,28311 gold badge2323 silver badges2626 bronze badges

• 
  
  
  

  
  3
  

  
  
  
  
  
  

  
  
  Is it just me, or does the man page not mention anywhere that it is treating the "two-byte quantities" as integers? I thought I was taking crazy pills...
  
  – slashingweapon
  Jun 14 '17 at 21:41
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @slashingweapon "two-byte quantity of input data" is uint16_t integer.
  
  – Ruslan
  May 8 '18 at 7:53
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  "Two bytes" is not the same as uint16_t on a little-endian system.
  
  – slashingweapon
  May 10 '18 at 16:43
  

  
  
  
  

add a comment | 

From the manpage:

 -x      Two-byte hexadecimal display.  Display the input offset in hexa‐

         decimal, followed by eight, space separated, four column, zero-

         filled, two-byte quantities of input data, in hexadecimal, per

         line.

...

 If no format strings are specified, the default display is equivalent to

 specifying the -x option.

Your output is little-endian (least significant byte first), which is also the endianness of the x86 and x86_64 architectures, which you are probably using.

share|improve this answer

edited Jan 30 at 22:46

Cory Klein

5,9722222 gold badges6262 silver badges8585 bronze badges

answered Nov 14 '12 at 23:54

Dennis KaarsemakerDennis Kaarsemaker

7,28311 gold badge2323 silver badges2626 bronze badges

 -x      Two-byte hexadecimal display.  Display the input offset in hexa‐

         decimal, followed by eight, space separated, four column, zero-

         filled, two-byte quantities of input data, in hexadecimal, per

         line.

 If no format strings are specified, the default display is equivalent to

 specifying the -x option.

share|improve this answer

edited Jan 30 at 22:46

Cory Klein

5,9722222 gold badges6262 silver badges8585 bronze badges

answered Nov 14 '12 at 23:54

Dennis KaarsemakerDennis Kaarsemaker

7,28311 gold badge2323 silver badges2626 bronze badges

edited Jan 30 at 22:46

Cory Klein

5,9722222 gold badges6262 silver badges8585 bronze badges

edited Jan 30 at 22:46

Cory Klein

5,9722222 gold badges6262 silver badges8585 bronze badges

answered Nov 14 '12 at 23:54

Dennis KaarsemakerDennis Kaarsemaker

7,28311 gold badge2323 silver badges2626 bronze badges

answered Nov 14 '12 at 23:54

Dennis KaarsemakerDennis Kaarsemaker

7,28311 gold badge2323 silver badges2626 bronze badges