Convert decimal to hexadecimal in UNIX shell script

Question

In a UNIX shell script  what can I use to convert decimal numbers into hexadecimal   I thought od would do the trick  but it s not realizing I m feeding it ASCII representations of numbers   printf   Gross   Using it for now  but what else is available

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Tried printf 1    printf   x n  34 22   There are probably ways of doing that with builtin functions in all shells but it would be less portable   I ve not checked the POSIX sh specs to see whether it has such capabilities

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Tried printf 1    printf   x n  34 22   There are probably ways of doing that with builtin functions in all shells but it would be less portable   I ve not checked the POSIX sh specs to see whether it has such capabilities

User · Answer

In zsh you can do this sort of thing     typeset -i 16 y   print       8  x   32  y   32    8 40   print  x  y 8 40 16 20   setopt c bases   print  y 0x20   Example taken from zsh docs page about Arithmetic Evaluation   I believe Bash has similar capabilities

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echo  obase 16  34    bc   If you want to filter a whole file of integers  one per line     echo  obase 16    cat file of integers     bc

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bash-4 2  printf   x n  4294967295 ffffffff  bash-4 2  printf -v hex   x  4294967295 bash-4 2  echo  hex ffffffff

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Tried printf 1    printf   x n  34 22   There are probably ways of doing that with builtin functions in all shells but it would be less portable   I ve not checked the POSIX sh specs to see whether it has such capabilities

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Sorry my fault  try this        bin bash    declare -r HEX DIGITS  0123456789ABCDEF   dec value  1 hex value     until    dec value    0    do      rem value    dec value   16       dec value    dec value   16        hex digit   HEX DIGITS  rem value 1       hex value    hex digit   hex value    done  echo -e    hex value     Example       dtoh 1024 400

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echo  obase 16  34    bc   If you want to filter a whole file of integers  one per line     echo  obase 16    cat file of integers     bc

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xd         printf  hex gt        while read i     do         printf  dec      0x  i     n nhex gt        done   dx         printf  dec gt        while read i     do         printf  hex   x n ndec gt     i     done

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Try   printf   X n    MY NUMBER

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Hexidecimal to decimal     echo    0xfee10000   4276158464   Decimal to hexadecimal     printf   x n  26 1a

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In my case  I stumbled upon one issue with using printf solution     printf   x  008 bash  printf  008  invalid octal number  The easiest way was to use solution with bc  suggested in post higher     bc  lt  lt  lt   obase 16  008  8

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echo  obase 16  34    bc   If you want to filter a whole file of integers  one per line     echo  obase 16    cat file of integers     bc

User · Answer

In zsh you can do this sort of thing     typeset -i 16 y   print       8  x   32  y   32    8 40   print  x  y 8 40 16 20   setopt c bases   print  y 0x20   Example taken from zsh docs page about Arithmetic Evaluation   I believe Bash has similar capabilities

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Try   printf   X n    MY NUMBER

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Sorry my fault  try this        bin bash    declare -r HEX DIGITS  0123456789ABCDEF   dec value  1 hex value     until    dec value    0    do      rem value    dec value   16       dec value    dec value   16        hex digit   HEX DIGITS  rem value 1       hex value    hex digit   hex value    done  echo -e    hex value     Example       dtoh 1024 400

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Hexidecimal to decimal     echo    0xfee10000   4276158464   Decimal to hexadecimal     printf   x n  26 1a

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Tried printf 1    printf   x n  34 22   There are probably ways of doing that with builtin functions in all shells but it would be less portable   I ve not checked the POSIX sh specs to see whether it has such capabilities

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xd         printf  hex gt        while read i     do         printf  dec      0x  i     n nhex gt        done   dx         printf  dec gt        while read i     do         printf  hex   x n ndec gt     i     done

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This is not a shell script  but it is the cli tool I m using to convert numbers among bin oct dec hex          usr bin perl      if   ARGV  lt  2          printf  Convert numbers among bin oct dec hex n          printf   nUsage  base b o d x num num2      n          exit             for   i 1   i lt  ARGV   i            if   ARGV 0  eq  b                          num   oct  0b ARGV  i             elsif   ARGV 0  eq  o                          num   oct  ARGV  i            elsif   ARGV 0  eq  d                          num    ARGV  i           elsif   ARGV 0  eq  h                          num   hex  ARGV  i            else                       printf  Usage  base b o d x num num2      n                        exit                printf  0x x   0d d   0 o   0b b n    num   num   num   num

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bash-4 2  printf   x n  4294967295 ffffffff  bash-4 2  printf -v hex   x  4294967295 bash-4 2  echo  hex ffffffff

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number conversion   while  test  ans  y   do     echo  Menu      echo  1 Decimal to Hexadecimal      echo  2 Decimal to Octal      echo  3 Hexadecimal to Binary      echo  4 Octal to Binary      echo  5 Hexadecimal to  Octal      echo  6 Octal to Hexadecimal      echo  7 Exit       read choice     case  choice in          1  echo  Enter the decimal no              read n            hex  echo  ibase 10 obase 16  n  bc             echo  The hexadecimal no  is  hex                         2  echo  Enter the decimal no              read n            oct  echo  ibase 10 obase 8  n  bc             echo  The octal no  is  oct                         3  echo  Enter the hexadecimal no              read n            binary  echo  ibase 16 obase 2  n  bc             echo  The binary no  is  binary                         4  echo  Enter the octal no              read n            binary  echo  ibase 8 obase 2  n  bc             echo  The binary no  is  binary                         5  echo  Enter the hexadecimal no              read n            oct  echo  ibase 16 obase 8  n  bc             echo  The octal no  is  oct                         6  echo  Enter the octal no              read n            hex  echo  ibase 8 obase 16  n  bc             echo  The hexadecimal no  is  hex                         7  exit                        echo  invalid no                    esac done

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Try   printf   X n    MY NUMBER

User · Answer

echo  obase 16  34    bc   If you want to filter a whole file of integers  one per line     echo  obase 16    cat file of integers     bc

User · Answer

In zsh you can do this sort of thing     typeset -i 16 y   print       8  x   32  y   32    8 40   print  x  y 8 40 16 20   setopt c bases   print  y 0x20   Example taken from zsh docs page about Arithmetic Evaluation   I believe Bash has similar capabilities

User · Answer

In my case  I stumbled upon one issue with using printf solution     printf   x  008 bash  printf  008  invalid octal number  The easiest way was to use solution with bc  suggested in post higher     bc  lt  lt  lt   obase 16  008  8

User · Answer

In zsh you can do this sort of thing     typeset -i 16 y   print       8  x   32  y   32    8 40   print  x  y 8 40 16 20   setopt c bases   print  y 0x20   Example taken from zsh docs page about Arithmetic Evaluation   I believe Bash has similar capabilities

User · Answer

Try   printf   X n    MY NUMBER

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number conversion   while  test  ans  y   do     echo  Menu      echo  1 Decimal to Hexadecimal      echo  2 Decimal to Octal      echo  3 Hexadecimal to Binary      echo  4 Octal to Binary      echo  5 Hexadecimal to  Octal      echo  6 Octal to Hexadecimal      echo  7 Exit       read choice     case  choice in          1  echo  Enter the decimal no              read n            hex  echo  ibase 10 obase 16  n  bc             echo  The hexadecimal no  is  hex                         2  echo  Enter the decimal no              read n            oct  echo  ibase 10 obase 8  n  bc             echo  The octal no  is  oct                         3  echo  Enter the hexadecimal no              read n            binary  echo  ibase 16 obase 2  n  bc             echo  The binary no  is  binary                         4  echo  Enter the octal no              read n            binary  echo  ibase 8 obase 2  n  bc             echo  The binary no  is  binary                         5  echo  Enter the hexadecimal no              read n            oct  echo  ibase 16 obase 8  n  bc             echo  The octal no  is  oct                         6  echo  Enter the octal no              read n            hex  echo  ibase 8 obase 16  n  bc             echo  The hexadecimal no  is  hex                         7  exit                        echo  invalid no                    esac done

User · Answer

This is not a shell script  but it is the cli tool I m using to convert numbers among bin oct dec hex          usr bin perl      if   ARGV  lt  2          printf  Convert numbers among bin oct dec hex n          printf   nUsage  base b o d x num num2      n          exit             for   i 1   i lt  ARGV   i            if   ARGV 0  eq  b                          num   oct  0b ARGV  i             elsif   ARGV 0  eq  o                          num   oct  ARGV  i            elsif   ARGV 0  eq  d                          num    ARGV  i           elsif   ARGV 0  eq  h                          num   hex  ARGV  i            else                       printf  Usage  base b o d x num num2      n                        exit                printf  0x x   0d d   0 o   0b b n    num   num   num   num

[unix] Convert decimal to hexadecimal in UNIX shell script

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